/* =========================
   1. VARIABLES
   ========================= */

:root {
  --color-navy: #102a43;
  --color-navy-deep: #071d31;
  --color-navy-soft: #294863;
  --color-text: #202b35;
  --color-muted: #68747f;
  --color-subtle: #8b959e;
  --color-border: #d9dfe3;
  --color-border-strong: #aeb8c0;
  --color-background: #f4f3f0;
  --color-surface: #fffefb;
  --color-surface-muted: #f8f8f6;
  --color-accent: #c92838;
  --color-accent-soft: #f7e9eb;
  --color-success: #2f6b57;
  --color-success-soft: #e8f1ed;
  --color-warning: #8b5f20;
  --color-warning-soft: #f7f0e3;
  --color-danger: #a53542;
  --color-danger-soft: #f8e9eb;
  --color-chart-fill: #e8edf0;

  --font-sans: "Helvetica Neue", "Yu Gothic", "YuGothic", "Hiragino Kaku Gothic ProN", Arial, sans-serif;
  --font-serif: "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", Georgia, serif;

  --font-size-xs: 0.6875rem;
  --font-size-sm: 0.8125rem;
  --font-size-md: 0.9375rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: clamp(1.75rem, 4vw, 3.5rem);

  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  --border-width: 1px;
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.125rem;
  --shadow-soft: 0 18px 50px rgba(16, 42, 67, 0.08);
  --content-width: 1180px;
  --transition: 160ms ease;
}

/* =========================
   2. BASE
   ========================= */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-md);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  color: inherit;
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(41, 72, 99, 0.22);
  outline-offset: 2px;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

[hidden] {
  display: none;
}

.brand-lockup {
  align-items: center;
  background: transparent;
  border: 0;
  display: inline-flex;
  padding: 0;
}

.brand-lockup img {
  display: block;
  height: auto;
  width: 15rem;
}

.button {
  align-items: center;
  border: var(--border-width) solid transparent;
  border-radius: var(--radius-sm);
  display: inline-flex;
  font-size: var(--font-size-sm);
  font-weight: 700;
  justify-content: center;
  letter-spacing: 0.04em;
  min-height: 2.8rem;
  padding: 0.65rem 1.15rem;
  transition: background-color var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}

.button:not(:disabled):active {
  transform: translateY(1px);
}

.button-primary {
  background: var(--color-navy);
  color: #fff;
}

.button-primary:hover {
  background: var(--color-navy-deep);
}

.button-secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-navy);
}

.button-secondary:hover {
  border-color: var(--color-navy-soft);
}

.button-quiet {
  background: transparent;
  color: var(--color-muted);
}

.button-quiet:hover {
  color: var(--color-navy);
}

.app-header {
  align-items: center;
  background: rgba(255, 254, 251, 0.94);
  border-bottom: var(--border-width) solid var(--color-border);
  display: flex;
  justify-content: center;
  min-height: 7rem;
  padding: var(--space-md) max(var(--space-lg), calc((100vw - var(--content-width)) / 2));
  position: sticky;
  top: 0;
  z-index: 20;
}

.app-main {
  margin: 0 auto;
  max-width: var(--content-width);
  padding: 0 var(--space-lg) var(--space-3xl);
}

.back-link {
  color: var(--color-navy-soft);
  display: inline-flex;
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
}

.app-header .back-link {
  left: 1rem;
  margin: 0;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.app-header .app-brand {
  margin: 0 auto;
}

.app-header .app-actions {
  margin-left: 0;
  position: absolute;
  right: max(var(--space-lg), calc((100vw - var(--content-width)) / 2));
}

.back-link:hover {
  color: var(--color-navy);
  text-decoration: underline;
}

.hero-section {
  padding: clamp(4rem, 9vw, 8rem) 0 clamp(3rem, 6vw, 5rem);
}

.hero-section .eyebrow,
.section-index {
  color: var(--color-accent);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.22em;
  margin-bottom: var(--space-sm);
}

.hero-section h1 {
  color: var(--color-navy-deep);
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.25;
  margin-bottom: var(--space-md);
}

.hero-section > p:not(.eyebrow) {
  color: var(--color-muted);
  font-size: var(--font-size-lg);
  max-width: 43rem;
}

.application-status {
  border-left: 2px solid var(--color-border-strong);
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  margin-top: var(--space-xl);
  min-height: 1.7rem;
  padding-left: var(--space-md);
  white-space: pre-line;
}

.application-status[data-status="success"] {
  border-color: var(--color-success);
  color: var(--color-success);
}

.application-status[data-status="warning"] {
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.application-status[data-status="error"] {
  border-color: var(--color-danger);
  color: var(--color-danger);
}

.section-heading {
  align-items: end;
  border-bottom: var(--border-width) solid var(--color-border-strong);
  display: flex;
  gap: var(--space-xl);
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
}

.section-heading h2 {
  color: var(--color-navy-deep);
  font-family: var(--font-serif);
  font-size: clamp(1.65rem, 3vw, 2.5rem);
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 0;
}

.section-heading p:last-child {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
  max-width: 30rem;
  text-align: right;
}

.section-heading .result-property span {
  display: block;
  font-size: var(--font-size-xs);
  letter-spacing: 0.08em;
}

.section-heading .result-property b {
  color: var(--color-navy-deep);
  display: block;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.app-footer {
  align-items: center;
  border-top: var(--border-width) solid var(--color-border);
  color: var(--color-muted);
  display: flex;
  font-size: var(--font-size-xs);
  gap: var(--space-xl);
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--content-width);
  padding: var(--space-xl) var(--space-lg);
}

.app-footer span {
  color: var(--color-navy);
  font-weight: 800;
  letter-spacing: 0.18em;
}

.app-footer p {
  margin-bottom: 0;
  text-align: right;
}

/* =========================
   3. INPUT SCREEN
   ========================= */

.input-screen {
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: clamp(1.5rem, 4vw, 3.5rem);
}

.form-section {
  border: 0;
  border-bottom: var(--border-width) solid var(--color-border);
  margin: 0;
  padding: 0 0 var(--space-xl);
}

.form-section + .form-section {
  padding-top: var(--space-xl);
}

.form-section legend {
  color: var(--color-navy);
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  padding: 0;
}

.source-guidance,
.calculation-boundary-note {
  background: var(--color-surface-muted);
  border-left: 2px solid var(--color-navy-soft);
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
}

.source-guidance {
  border-left: 0;
}

.source-guidance strong {
  color: var(--color-navy);
  flex: 0 0 9rem;
  font-size: var(--font-size-sm);
}

.source-guidance p,
.calculation-boundary-note p {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

.load-input-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.load-input-card {
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.load-input-card .load-code {
  color: var(--color-accent);
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
  margin-bottom: var(--space-xs);
}

.load-input-card h3 {
  color: var(--color-navy-deep);
  font-size: 1.05rem;
  margin-bottom: var(--space-2xs);
}

.load-input-card > p {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-lg);
}

.operation-fields {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.additional-loads {
  border-top: var(--border-width) solid var(--color-border);
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
}

.additional-loads > header {
  align-items: center;
  display: flex;
  gap: var(--space-lg);
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.additional-loads .load-code {
  color: var(--color-accent);
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
}

.additional-loads h3 {
  color: var(--color-navy-deep);
  font-size: 1.05rem;
  margin: var(--space-2xs) 0;
}

.additional-loads header p,
.empty-load-message {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

.additional-load-list {
  display: grid;
  gap: var(--space-sm);
}

.additional-load-row {
  align-items: start;
  background: var(--color-surface-muted);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  display: grid;
  gap: var(--space-md);
  grid-template-columns: minmax(0, 1.4fr) minmax(8rem, 0.7fr) minmax(11rem, 1fr) auto;
  padding: var(--space-md);
}

.emergency-lighting-row {
  align-items: start;
  background: var(--color-surface-muted);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  display: grid;
  gap: var(--space-sm);
  grid-template-columns: 1fr;
  padding: var(--space-md);
}

.emergency-lighting-row > * {
  min-width: 0;
}

.emergency-lighting-list {
  display: grid;
  gap: var(--space-sm);
}

.emergency-lighting-actions {
  display: flex;
  justify-content: flex-start;
  margin-top: var(--space-sm);
}

.emergency-lighting-row-title {
  align-self: center;
  color: var(--color-navy-deep);
  font-size: var(--font-size-md);
  margin: 0;
  white-space: nowrap;
}

.emergency-lighting-row .remove-load-button {
  justify-self: end;
}

.emergency-lighting-type-field {
  min-width: 0;
}

.emergency-lighting-radio-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1rem;
}

.emergency-lighting-brightness-options,
.emergency-lighting-halogen-options {
  display: grid;
  gap: 0.45rem 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.emergency-lighting-operation-options {
  gap: 0.55rem 1.25rem;
}

.emergency-lighting-condition-grid {
  gap: var(--space-md) var(--space-lg);
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: var(--space-md);
}

.emergency-lighting-fixed-maintenance {
  align-items: baseline;
  color: var(--color-navy-deep);
  display: flex;
  gap: 0.35rem;
  margin: 0;
}

.emergency-lighting-fixed-maintenance strong {
  font-size: 1.75rem;
  line-height: 1.2;
}

.emergency-lighting-fixed-maintenance span {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  font-weight: 700;
}

.emergency-lighting-brightness-options label,
.emergency-lighting-halogen-options label {
  white-space: normal;
}

.emergency-lighting-radio-options label {
  align-items: center;
  display: inline-flex;
  gap: 0.45rem;
  white-space: nowrap;
}

.emergency-lighting-radio-options input[type="radio"] {
  appearance: auto;
  background: transparent;
  border: 0;
  border-radius: 50%;
  box-shadow: none;
  margin: 0;
  min-height: auto;
  padding: 0;
  width: auto;
}

.emergency-lighting-power-fields {
  display: grid;
  gap: var(--space-xs);
}

.emergency-lighting-power-fields[hidden] {
  display: none !important;
}

.emergency-lighting-led-power-display {
  justify-content: center;
  padding: 0;
}

.emergency-lighting-line-total-field {
  background: rgba(255, 255, 255, 0.7);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  justify-content: center;
  padding: var(--space-sm);
}

.result-emergency-lighting-lines {
  display: grid;
  gap: var(--space-sm);
}

.result-emergency-lighting-line {
  background: var(--color-surface-muted);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-sm);
}

.result-emergency-lighting-line h4 {
  margin: 0 0 0.2rem;
}

.result-emergency-lighting-line p,
.result-emergency-lighting-line small {
  margin: 0;
}

.remove-load-button {
  align-self: center;
  background: transparent;
  border: 0;
  color: var(--color-danger);
  font-size: var(--font-size-sm);
  padding: var(--space-sm);
}

.remove-load-button:hover {
  text-decoration: underline;
}

.empty-load-message {
  border: var(--border-width) dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
}

.calculation-boundary-note span {
  align-items: center;
  background: var(--color-navy);
  border-radius: 50%;
  color: #fff;
  display: inline-flex;
  flex: 0 0 2.1rem;
  font-size: var(--font-size-xs);
  font-weight: 800;
  height: 2.1rem;
  justify-content: center;
}

.form-actions {
  align-items: center;
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
  padding-top: var(--space-xl);
}

/* =========================
   4. FORM
   ========================= */

.form-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-grid-single {
  grid-template-columns: 1fr;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  min-width: 0;
}

.form-field-wide {
  max-width: 42rem;
}

.field-label {
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 700;
}

.form-field input,
.form-field select {
  appearance: none;
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  min-height: 3rem;
  padding: 0.65rem 0.8rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}

.form-field select {
  appearance: auto;
  background-image: none;
  padding-right: 0.8rem;
}

.form-field input:hover,
.form-field select:hover {
  border-color: var(--color-navy-soft);
}

.form-field input[readonly] {
  background: var(--color-surface-muted);
  color: var(--color-muted);
  cursor: default;
}

.form-field input[aria-invalid="true"],
.form-field select[aria-invalid="true"] {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(165, 53, 66, 0.1);
}

.form-field.has-error .field-label {
  color: var(--color-danger);
}

.input-with-unit {
  align-items: center;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
}

.input-with-unit input {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.input-with-unit > span {
  align-items: center;
  background: var(--color-surface-muted);
  border: var(--border-width) solid var(--color-border-strong);
  border-left: 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-muted);
  display: flex;
  font-size: var(--font-size-sm);
  height: 3rem;
  padding: 0 var(--space-sm);
  white-space: nowrap;
}

.emergency-lighting-total-field {
  background: var(--color-surface-muted);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-sm);
  justify-content: center;
  padding: var(--space-md);
}

.emergency-lighting-total-value {
  align-items: baseline;
  color: var(--color-navy-deep);
  display: flex;
  gap: 0.35rem;
  margin: 0;
}

.emergency-lighting-total-value strong {
  font-size: 1.75rem;
  line-height: 1.2;
}

.emergency-lighting-total-value span {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  font-weight: 700;
}

.emergency-lighting-grid {
  gap: var(--space-md);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.emergency-lighting-grid .form-field {
  min-width: 0;
}

.emergency-lighting-quick-field {
  grid-column: 1 / -1;
}

.emergency-lighting-grid .emergency-lighting-total-field {
  grid-column: 1 / -1;
}

.emergency-lighting-row .remove-load-button {
  align-self: center;
  min-height: 2.6rem;
}

.field-error {
  color: var(--color-danger);
  font-size: var(--font-size-xs);
  min-height: 1.2em;
}

.voltage-total {
  color: var(--color-navy-soft);
  font-size: var(--font-size-sm);
  font-weight: 700;
}

/* =========================
   5. DISCHARGE PATTERN
   ========================= */

.discharge-pattern-chart {
  display: block;
  height: auto;
  width: 100%;
}

.discharge-pattern-chart .chart-axis {
  stroke: var(--color-navy);
  stroke-width: 1.25;
}

.discharge-pattern-chart .chart-grid {
  stroke: var(--color-border);
  stroke-width: 1;
}

.discharge-pattern-chart .chart-grid-vertical {
  stroke-dasharray: 3 4;
}

.discharge-pattern-chart .chart-area {
  fill: var(--color-chart-fill);
  opacity: 0.68;
  stroke: none;
}

.discharge-pattern-chart .chart-line {
  fill: none;
  stroke: var(--color-navy);
  stroke-linejoin: round;
  stroke-width: 2.4;
}

.discharge-pattern-chart .chart-point {
  fill: var(--color-navy);
}

.discharge-pattern-chart .chart-tick,
.discharge-pattern-chart .chart-axis-label,
.discharge-pattern-chart .chart-y-axis-title,
.discharge-pattern-chart .chart-segment-duration,
.discharge-pattern-chart .chart-recovery-label {
  fill: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 11px;
}

.discharge-pattern-chart .chart-axis-label,
.discharge-pattern-chart .chart-y-axis-title,
.discharge-pattern-chart .chart-segment-id {
  font-weight: 700;
}

.discharge-pattern-chart .chart-segment-id {
  fill: var(--color-navy);
  font-family: var(--font-sans);
  font-size: 12px;
}

.discharge-pattern-chart .chart-current {
  fill: var(--color-navy-deep);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
}

.discharge-pattern-chart .chart-recovery-label {
  fill: var(--color-accent);
  font-weight: 700;
}

/* =========================
   6. RESULT SCREEN
   ========================= */

.result-screen {
  padding-top: var(--space-3xl);
}

.calculation-notice {
  background: var(--color-warning-soft);
  border-left: 3px solid var(--color-warning);
  margin-bottom: var(--space-lg);
  padding: var(--space-lg);
}

.calculation-notice strong {
  color: var(--color-warning);
}

.calculation-notice p {
  margin: var(--space-xs) 0;
}

.calculation-notice ul {
  margin: 0;
  padding-left: 1.2rem;
}

.result-overview {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: 1.35fr repeat(4, minmax(0, 1fr));
}

.primary-result-card,
.result-metric-card {
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  min-height: 10.5rem;
  padding: var(--space-lg);
}

.primary-result-card {
  background: var(--color-navy);
  border-color: var(--color-navy);
  color: #fff;
}

.primary-result-card > span,
.result-metric-card > span {
  color: var(--color-subtle);
  display: block;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  margin-bottom: var(--space-lg);
}

.primary-result-card > span {
  color: #bfcbd4;
}

.primary-result-card h3,
.result-metric-card h3 {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-sm);
}

.primary-result-card strong {
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 500;
  line-height: 1.1;
}

.result-metric-card strong {
  color: var(--color-navy-deep);
  display: block;
  font-size: 1.15rem;
  line-height: 1.35;
}

.result-metric-card small {
  color: var(--color-muted);
  display: block;
  font-size: var(--font-size-xs);
  margin-top: var(--space-xs);
}

.combined-power-values {
  display: grid;
  gap: var(--space-xs);
  margin: 0;
}

.combined-power-values div {
  align-items: baseline;
  display: flex;
  gap: var(--space-sm);
  justify-content: space-between;
}

.combined-power-values dt {
  color: var(--color-muted);
  font-size: var(--font-size-xs);
}

.combined-power-values dd {
  color: var(--color-navy-deep);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0;
  white-space: nowrap;
}

.dc-power-card .dc-power-process {
  border-top: var(--border-width) solid var(--color-border);
  line-height: 1.5;
  margin-top: var(--space-sm);
  padding-top: var(--space-xs);
}

.dc-power-card small b {
  color: var(--color-navy);
}

.sba-equation {
  align-items: center;
  color: var(--color-navy-deep);
  display: flex;
  flex-wrap: wrap;
  font-family: var(--font-serif);
  font-size: 0.86rem;
  gap: 0.25em;
  line-height: 1.65;
  margin: 0 0 var(--space-sm);
  max-width: 100%;
}

.equation-prefix {
  align-items: center;
  display: inline-flex;
  gap: 0.22em;
  white-space: nowrap;
}

.equation-body {
  white-space: nowrap;
}

.equation-fraction {
  display: inline-grid;
  grid-template-rows: auto auto;
  line-height: 1;
  text-align: center;
  vertical-align: middle;
}

.equation-fraction span:first-child {
  border-bottom: 1px solid currentColor;
  padding: 0 0.25em 0.08em;
}

.equation-fraction span:last-child {
  padding-top: 0.08em;
}

.sba-equation sub {
  font-size: 0.68em;
  line-height: 0;
}

.sba-symbols {
  display: grid;
  gap: 0.15rem var(--space-sm);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
}

.sba-symbols div {
  display: grid;
  font-size: 0.62rem;
  grid-template-columns: 1rem 1fr;
}

.sba-symbols dt {
  color: var(--color-navy);
  font-weight: 700;
}

.sba-symbols dd {
  color: var(--color-muted);
  margin: 0;
}

.result-detail-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1.6fr 1fr;
  margin-top: var(--space-lg);
}

.result-panel {
  background: var(--color-surface);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.discharge-pattern-panel {
  grid-row: span 2;
}

.result-panel header {
  border-bottom: var(--border-width) solid var(--color-border);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
}

.result-panel header span {
  color: var(--color-accent);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
}

.result-panel header h3 {
  color: var(--color-navy-deep);
  font-size: var(--font-size-lg);
  margin: var(--space-2xs) 0 0;
}

.calculation-case {
  align-items: center;
  border-bottom: var(--border-width) solid var(--color-border);
  display: grid;
  gap: var(--space-md);
  grid-template-columns: auto minmax(0, 1fr) auto;
  padding: var(--space-md) 0;
}

.calculation-case:last-child {
  border-bottom: 0;
}

.calculation-case-number {
  color: var(--color-border-strong);
  font-family: var(--font-serif);
  font-size: 1.6rem;
}

.calculation-case h4 {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-2xs);
}

.calculation-case p {
  color: var(--color-muted);
  font-size: var(--font-size-xs);
  margin-bottom: 0;
}

.calculation-case strong {
  color: var(--color-navy);
  font-size: var(--font-size-sm);
  text-align: right;
}

.alternative-battery {
  background: var(--color-surface-muted);
  border-left: 2px solid var(--color-navy-soft);
  display: grid;
  gap: var(--space-xs);
  padding: var(--space-md);
}

.alternative-battery span {
  color: var(--color-muted);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
}

.alternative-battery strong {
  color: var(--color-navy);
  font-size: var(--font-size-lg);
}

.alternative-battery small {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
}

@media screen {
  .calculation-mode-options {
    display: grid;
    gap: 1px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .calculation-mode-options label {
    align-items: flex-start;
    border: 1px solid var(--color-border);
    display: flex;
    gap: 0.75rem;
    padding: 1rem;
  }

  .calculation-mode-options input {
    accent-color: var(--color-navy);
    margin-top: 0.25rem;
  }

  .calculation-mode-options b,
  .calculation-mode-options small {
    display: block;
  }

  .calculation-mode-options b {
    color: var(--color-navy-deep);
  }

  .calculation-mode-options small {
    color: var(--color-muted);
    font-size: var(--font-size-xs);
    line-height: 1.55;
    margin-top: 0.2rem;
  }

  .generator-result-grid {
    display: grid;
    gap: 1px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .generator-result-grid dl {
    border: 1px solid var(--color-border);
    margin: 0;
    padding: 1rem;
  }

  .generator-result-grid dt {
    color: var(--color-muted);
    font-size: var(--font-size-xs);
  }

  .generator-result-grid dd {
    color: var(--color-navy-deep);
    font-weight: 700;
    margin: 0 0 0.75rem;
  }

  .emergency-lighting-result-grid dd {
    font-size: 1.05rem;
  }

  .emergency-lighting-result-grid dl:last-child dd:first-of-type {
    color: var(--color-accent);
    font-size: 1.3rem;
  }

  .fire-safety-result {
    border-bottom: 1px solid var(--color-border);
    border-top: 1px solid var(--color-navy);
    margin-top: 2rem;
    padding: 1.5rem 0;
  }

  .fire-safety-result header span {
    color: var(--color-accent);
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: 0.16em;
  }

  .fire-safety-result h3 {
    color: var(--color-navy-deep);
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 500;
    margin: 0.2rem 0 1rem;
  }

  .fire-safety-result dl {
    display: grid;
    gap: 0;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin: 0;
  }

  .fire-safety-result dl div {
    border-left: 1px solid var(--color-border);
    min-width: 0;
    padding: 0.75rem 1rem;
  }

  .fire-safety-result dl div:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .fire-safety-result dt {
    color: var(--color-muted);
    font-size: 0.65rem;
  }

  .fire-safety-result dd {
    color: var(--color-navy-deep);
    font-size: 1rem;
    font-weight: 700;
    margin: 0.2rem 0 0;
    overflow-wrap: anywhere;
  }
}

/* =========================
   7. PDF REPORT
   ========================= */

.pdf-report {
  background: var(--color-surface);
  color: var(--color-navy-deep);
  display: none;
  font-family: var(--font-sans);
  height: 297mm;
  padding: 12mm 13mm 10mm;
  width: 210mm;
}

/* =========================================
   PDF REPORT — FACILINEX COVER HEADER
   ========================================= */

.pdf-report .report-header {
  align-items: center;
  display: flex;
  height: 13mm;
  justify-content: space-between;
  position: relative;
}

.pdf-report .report-header::after {
  background: var(--color-border);
  bottom: -2.5mm;
  content: "";
  height: 0.2mm;
  left: 0;
  position: absolute;
  right: 0;
}

.pdf-report .report-brand {
  align-items: center;
  display: flex;
  height: 12mm;
  justify-content: flex-start;
  width: 34mm;
}

.pdf-report .report-brand img {
  display: block;
  height: auto;
  max-height: 12mm;
  max-width: 34mm;
  object-fit: contain;
  object-position: left center;
  width: auto;
}

.pdf-report .report-system-label {
  align-items: center;
  display: flex;
  gap: 3mm;
}

.pdf-report .report-system-label::after {
  background: var(--color-subtle);
  content: "";
  display: block;
  height: 0.2mm;
  width: 8mm;
}

.pdf-report .report-system-label span {
  color: var(--color-subtle);
  font-size: 4.6pt;
  font-weight: 700;
  letter-spacing: 0.24em;
  white-space: nowrap;
}

.pdf-report .report-title {
  align-items: start;
  display: grid;
  gap: 12mm;
  grid-template-columns: minmax(0, 1fr) 32mm;
  margin-top: 13mm;
  padding-bottom: 8mm;
}

.pdf-report .report-title-main {
  min-width: 0;
}

.pdf-report .report-title-main > p:first-child {
  color: var(--color-muted);
  font-size: 6.5pt;
  font-weight: 700;
  letter-spacing: 0.24em;
  line-height: 1.4;
  margin: 0 0 3.2mm;
}

.pdf-report .report-title h1 {
  color: var(--color-navy-deep);
  font-family: var(--font-serif);
  font-size: 27pt;
  font-weight: 500;
  letter-spacing: 0.055em;
  line-height: 1.18;
  margin: 0;
}

.pdf-report .report-tagline {
  color: var(--color-muted);
  font-size: 7.2pt;
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1.6;
  margin: 4mm 0 0;
}

.pdf-report .report-title-meta {
  border-left: 0.2mm solid var(--color-border-strong);
  display: flex;
  flex-direction: column;
  gap: 4.5mm;
  min-height: 24mm;
  padding-left: 5mm;
}

.pdf-report .report-meta-item {
  display: grid;
  gap: 1mm;
}

.pdf-report .report-meta-item small {
  color: var(--color-muted);
  font-size: 4.8pt;
  font-weight: 700;
  letter-spacing: 0.2em;
  line-height: 1.3;
}

.pdf-report .report-meta-item b,
.pdf-report .report-meta-item time {
  color: var(--color-navy-deep);
  font-size: 6.5pt;
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.4;
  white-space: nowrap;
}

.pdf-report .report-meta-item time {
  display: block;
}

.pdf-report #report-project-block b,
.pdf-report #report-company-block b {
  overflow-wrap: anywhere;
  white-space: normal;
}

@media (max-width: 720px) {
  .pdf-report .report-header { height: 11mm; }
  .pdf-report .report-brand { height: 10mm; width: 29mm; }
  .pdf-report .report-brand img { max-height: 10mm; max-width: 29mm; }
  .pdf-report .report-system-label span { font-size: 4pt; letter-spacing: 0.16em; }
  .pdf-report .report-system-label::after { width: 5mm; }
  .pdf-report .report-title { gap: 6mm; grid-template-columns: minmax(0, 1fr) 27mm; margin-top: 9mm; }
  .pdf-report .report-title h1 { font-size: 21pt; }
  .pdf-report .report-title-main > p:first-child { font-size: 5.5pt; }
  .pdf-report .report-tagline { font-size: 6pt; }
  .pdf-report .report-title-meta { padding-left: 3.5mm; }
  .pdf-report .report-meta-item small { font-size: 4pt; }
  .pdf-report .report-meta-item b,
  .pdf-report .report-meta-item time { font-size: 5.5pt; }
}

.pdf-report .result-formula {
  display: grid;
  grid-template-columns: 43% 57%;
  margin-top: 6mm;
  min-height: 36mm;
}

.pdf-report .result-formula > article {
  padding-right: 8mm;
}

.pdf-report .result-formula .formula {
  border-left: 0.25mm solid var(--color-border-strong);
  padding-left: 8mm;
  padding-right: 0;
}

.pdf-report .report-section-label {
  align-items: center;
  display: flex;
  gap: 2.5mm;
  line-height: 1;
  margin-bottom: 3mm;
}

.pdf-report .report-section-label i {
  background: var(--color-accent);
  display: block;
  height: 4mm;
  width: 0.55mm;
}

.pdf-report .report-section-label b {
  font-size: 9pt;
  letter-spacing: 0.04em;
}

.pdf-report .report-section-label span {
  color: var(--color-muted);
  font-size: 5.5pt;
  letter-spacing: 0.16em;
}

.pdf-report .result > p {
  font-size: 8pt;
  font-weight: 700;
  margin: 5mm 0 0;
}

.pdf-report .result > strong {
  align-items: baseline;
  display: flex;
  font-family: var(--font-serif);
  font-size: 40pt;
  font-weight: 500;
  gap: 2mm;
  line-height: 1;
  margin-top: 2mm;
}

.pdf-report .result > strong small {
  font-family: var(--font-sans);
  font-size: 16pt;
  font-weight: 400;
}

.pdf-report .formula .sba-equation {
  flex-wrap: nowrap;
  font-size: 10pt;
  margin-bottom: 2mm;
}

.pdf-report .formula dl {
  font-size: 6.4pt;
  margin: 0;
}

.pdf-report .formula dl div {
  display: grid;
  grid-template-columns: 5mm 1fr;
}

.pdf-report .formula dt,
.pdf-report .formula dd {
  margin: 0;
}

.pdf-report .power-summary {
  border-bottom: 0.25mm solid var(--color-border-strong);
  border-top: 0.25mm solid var(--color-border-strong);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 3mm;
  min-height: 20mm;
}

.pdf-report .power-summary article {
  border-right: 0.25mm solid var(--color-border);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2.5mm 4mm;
}

.pdf-report .power-summary article:last-child {
  border-right: 0;
}

.pdf-report .power-summary span {
  color: var(--color-muted);
  font-size: 5pt;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.pdf-report .power-summary b {
  font-family: var(--font-serif);
  font-size: 12pt;
  font-weight: 500;
  line-height: 1.2;
  margin-top: 1.2mm;
}

.pdf-report .report-generator-starting,
.pdf-report .report-fire-safety-summary {
  margin-top: 3mm;
}

.pdf-report .report-generator-starting .report-section-label,
.pdf-report .report-fire-safety-summary .report-section-label {
  margin-bottom: 1.5mm;
}

.pdf-report .report-generator-starting table,
.pdf-report .report-fire-safety-summary table {
  border-collapse: collapse;
  font-size: 5.8pt;
  table-layout: fixed;
  width: 100%;
}

.pdf-report .report-generator-starting th,
.pdf-report .report-generator-starting td,
.pdf-report .report-fire-safety-summary th,
.pdf-report .report-fire-safety-summary td {
  border: 0.2mm solid var(--color-border);
  padding: 1mm 2mm;
  text-align: left;
}

.pdf-report .report-generator-starting th,
.pdf-report .report-fire-safety-summary th {
  color: var(--color-muted);
  font-weight: 600;
  width: 34%;
}

.pdf-report .report-generator-starting td,
.pdf-report .report-fire-safety-summary td {
  color: var(--color-navy-deep);
  font-weight: 700;
}

.pdf-report .report-generator-starting tr:nth-child(2) th,
.pdf-report .report-generator-starting tr:nth-child(2) td {
  background: transparent;
}

.pdf-report .report-generator-starting tr:nth-child(2) td {
  color: var(--color-navy-deep);
  font-size: 5.8pt;
  font-weight: 700;
  white-space: nowrap;
}

.pdf-report .power-summary small {
  color: var(--color-muted);
  font-size: 5.8pt;
  margin-top: 0.8mm;
}

.pdf-report .report-power-combined dl {
  display: grid;
  font-size: 5.8pt;
  gap: 0.6mm;
  margin: 1.2mm 0 0;
}

.pdf-report .report-power-combined dl div {
  display: flex;
  gap: 1.5mm;
  justify-content: space-between;
}

.pdf-report .report-power-combined dt,
.pdf-report .report-power-combined dd {
  margin: 0;
}

.pdf-report .report-power-combined dd {
  font-weight: 700;
}

.pdf-report #report-charger-basis,
.pdf-report #report-dc-process {
  border-top: 0.2mm solid var(--color-border);
  font-size: 4.8pt;
  line-height: 1.3;
  padding-top: 0.6mm;
}

.pdf-report .report-reference {
  align-items: baseline;
  display: flex;
  gap: 1.2mm;
}

.pdf-report .report-reference em {
  color: var(--color-subtle);
  font-size: 4.5pt;
  font-style: normal;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.pdf-report .report-dc-power small b {
  display: inline;
  font-family: var(--font-sans);
  font-size: 5.8pt;
  font-weight: 700;
  margin: 0;
}

.pdf-report #report-capacity-margin-basis {
  border-top: 0.2mm solid var(--color-border);
  font-size: 5pt;
  line-height: 1.3;
  padding-top: 0.6mm;
}

.pdf-report #report-capacity-margin-rate {
  font-size: 5pt;
  line-height: 1.3;
}

.pdf-report #report-battery-alternative {
  color: var(--color-navy-soft);
  line-height: 1.3;
}

.pdf-report .report-discharge-pattern {
  margin-top: 5mm;
}

.pdf-report .report-discharge-pattern .discharge-pattern-chart {
  height: 48mm;
}

/* Hidden report blocks must stay hidden during html2canvas export.
   Some PDF layout rules have higher specificity than the global [hidden] rule. */
.pdf-report [hidden] {
  display: none !important;
}


.pdf-report .technical-data {
  display: grid;
  gap: 5mm;
  grid-template-columns: 29% 40% 31%;
  margin-top: 4mm;
  min-height: 49mm;
}

.pdf-report .technical-data > article {
  border-right: 0.25mm solid var(--color-border-strong);
  padding-right: 5mm;
}

.pdf-report .technical-data > article:last-child {
  border-right: 0;
  padding-right: 0;
}

.pdf-report .conditions dl {
  font-size: 6.2pt;
  margin: 0;
}

.pdf-report .conditions dl div {
  border-bottom: 0.2mm solid var(--color-border);
  display: grid;
  grid-template-columns: 45% 55%;
  padding: 1.15mm 0;
}

.pdf-report .conditions dt {
  color: var(--color-muted);
}

.pdf-report .conditions dd {
  margin: 0;
  text-align: right;
}

.pdf-report .calculation ol,
.pdf-report .k-value ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.pdf-report .calculation li {
  align-items: center;
  border-bottom: 0.2mm solid var(--color-border);
  display: grid;
  gap: 2mm;
  grid-template-columns: 8mm 1fr auto;
  padding: 2mm 0;
}

.pdf-report .calculation li > span {
  color: var(--color-border-strong);
  font-family: var(--font-serif);
  font-size: 14pt;
}

.pdf-report .calculation li b {
  display: block;
  font-size: 6.4pt;
}

.pdf-report .calculation li small {
  color: var(--color-muted);
  display: block;
  font-size: 5.5pt;
  line-height: 1.35;
}

.pdf-report .calculation li strong {
  font-size: 6.5pt;
  white-space: nowrap;
}

.pdf-report .calculation-basis {
  border-top: 0.25mm solid var(--color-border-strong);
  margin-top: 2mm;
  padding-top: 1.5mm;
}

.pdf-report .calculation-basis h3 {
  color: var(--color-navy);
  font-size: 5.8pt;
  letter-spacing: 0.08em;
  margin-bottom: 0.8mm;
}

.pdf-report .calculation-basis p {
  display: grid;
  font-size: 5.2pt;
  gap: 1.2mm;
  grid-template-columns: 10mm 1fr;
  line-height: 1.35;
  margin-bottom: 0.5mm;
}

.pdf-report .calculation-basis p b {
  color: var(--color-muted);
  font-size: 5.2pt;
}

.pdf-report .calculation-basis .basis-result {
  border-top: 0.2mm solid var(--color-border);
  margin-top: 0.8mm;
  padding-top: 0.8mm;
}

.pdf-report .k-value li {
  background: var(--color-surface-muted);
  display: flex;
  flex-direction: column;
  margin-bottom: 2mm;
  padding: 3.5mm 4mm;
}

.pdf-report .k-value li strong {
  color: var(--color-navy-deep);
  font-family: var(--font-serif);
  font-size: 11.5pt;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.32;
}

.pdf-report .k-value li span {
  color: var(--color-muted);
  font-size: 5.8pt;
  line-height: 1.4;
  margin-top: 2.2mm;
}

.pdf-report .k-value li small {
  border-top: 0.2mm solid var(--color-border);
  color: var(--color-muted);
  font-size: 5.2pt;
  line-height: 1.4;
  margin-top: 2mm;
  padding-top: 2mm;
}

.pdf-report .source-note {
  border-top: 0.25mm solid var(--color-navy);
  display: grid;
  gap: 3.5mm;
  grid-template-columns: 23mm 1fr;
  margin-top: 3.5mm;
  padding-top: 2.3mm;
}

.pdf-report .source-note b {
  color: var(--color-navy);
  font-size: 5.5pt;
  letter-spacing: 0.12em;
}

.pdf-report .source-note p {
  color: var(--color-muted);
  font-size: 5.6pt;
  line-height: 1.55;
  margin-bottom: 0;
}

.pdf-report .source-note .report-disclaimer {
  border-top: 0.2mm solid var(--color-border);
  font-size: 5.2pt;
  line-height: 1.5;
  margin-top: 1.5mm;
  padding-top: 1.5mm;
}

/* =========================
   8. RESPONSIVE
   ========================= */

@media (max-width: 1020px) {
  .result-overview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .primary-result-card {
    grid-column: span 2;
  }

  .result-detail-grid {
    grid-template-columns: 1fr;
  }

  .discharge-pattern-panel {
    grid-row: auto;
  }
}

@media (max-width: 720px) {
  :root {
    --space-3xl: 4rem;
  }

  .app-header {
    justify-content: center;
    min-height: 5.75rem;
    padding: var(--space-sm) var(--space-md);
  }

  .app-brand {
    left: 50%;
    position: absolute;
    transform: translateX(-50%);
  }

  .app-header .back-link {
    left: 0.25rem;
    top: 0.5rem;
    transform: none;
  }

  .app-header .app-actions {
    right: 0.75rem;
  }

  .app-actions {
    margin-left: auto;
  }

  .app-actions .button {
    font-size: 0;
    min-width: 2.8rem;
    padding: 0.65rem;
  }

  .app-actions .button::before {
    content: "PDF";
    font-size: var(--font-size-xs);
  }

  .app-brand img {
    width: 10.5rem;
  }

  .app-main {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .hero-section {
    padding-top: 4rem;
  }


  .section-heading {
    align-items: start;
    flex-direction: column;
    gap: var(--space-sm);
  }

  .section-heading p:last-child {
    text-align: left;
  }

  .input-screen {
    border-radius: var(--radius-md);
    padding: var(--space-lg) var(--space-md);
  }

  .form-grid,
  .load-input-grid,
  .operation-fields,
  .additional-load-row,
  .emergency-lighting-row,
  .result-overview {
    grid-template-columns: 1fr;
  }

  .emergency-lighting-row .remove-load-button {
    justify-self: end;
  }

  .emergency-lighting-brightness-options,
  .emergency-lighting-halogen-options {
    gap: 0.4rem 0.8rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .primary-result-card {
    grid-column: auto;
  }

  .source-guidance {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .source-guidance strong {
    flex-basis: auto;
  }

  .additional-loads > header {
    align-items: stretch;
    flex-direction: column;
  }

  .sba-formula-card .sba-equation {
    font-size: 0.82rem;
  }

  .form-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .form-actions .button {
    width: 100%;
  }

  .result-panel {
    padding: var(--space-md);
  }

  .calculation-case {
    align-items: start;
    grid-template-columns: auto minmax(0, 1fr);
  }

  .calculation-case strong {
    grid-column: 2;
    text-align: left;
  }

  .app-footer {
    align-items: start;
    flex-direction: column;
    gap: var(--space-sm);
  }

  .app-footer p {
    text-align: left;
  }
}

@media (max-width: 420px) {
  .app-brand img {
    width: 9rem;
  }

  .hero-section > p:not(.eyebrow) {
    font-size: var(--font-size-md);
  }

  .load-input-card {
    padding: var(--space-md);
  }

  .emergency-lighting-input {
    overflow-x: hidden;
  }

  .emergency-lighting-row {
    gap: var(--space-sm);
    padding: var(--space-sm);
  }

  .emergency-lighting-row .input-with-unit input,
  .emergency-lighting-row .input-with-unit > span {
    height: 3.1rem;
    min-height: 3.1rem;
  }

  .emergency-lighting-row .remove-load-button {
    justify-self: end;
    padding-right: 0;
  }

  .emergency-lighting-brightness-options,
  .emergency-lighting-halogen-options {
    grid-template-columns: 1fr;
  }
}

/* =========================
   9. PRINT
   ========================= */

@page {
  size: A4 portrait;
  margin: 0;
}

@media print {
  html,
  body {
    background: #fff;
    height: 297mm;
    margin: 0;
    padding: 0;
    width: 210mm;
  }

  .app-header,
  .app-main,
  .app-footer {
    display: none;
  }

  .pdf-report {
    display: block;
    page-break-after: avoid;
    page-break-before: avoid;
    page-break-inside: avoid;
  }
}

/* =========================
   10. WEB UI FINAL POLISH
   PDF rules above remain isolated from these screen-only styles.
   ========================= */

@media screen {
  body {
    background: #f2f1ee;
    letter-spacing: 0.005em;
  }

  .app-header {
    backdrop-filter: blur(14px);
    min-height: 4.75rem;
  }

  .app-main {
    max-width: 1120px;
    padding-bottom: 7rem;
  }

  .hero-section {
    border-left: 1px solid var(--color-border);
    padding: clamp(4.5rem, 10vw, 8.5rem) 0 clamp(3rem, 7vw, 5.5rem) clamp(1.5rem, 4vw, 3.5rem);
  }

  .hero-section h1 {
    font-size: clamp(2.45rem, 6vw, 4.9rem);
    letter-spacing: 0.01em;
    margin-bottom: 1.25rem;
  }

  .hero-section > p:not(.eyebrow) {
    line-height: 1.9;
  }

  .application-status {
    border-left-color: var(--color-accent);
    margin-top: 2rem;
    max-width: 38rem;
  }

  .input-screen {
    border-radius: 2px;
    box-shadow: 0 24px 70px rgba(7, 29, 49, 0.055);
    padding: clamp(2rem, 5vw, 4.25rem);
  }

  .section-heading {
    align-items: flex-end;
    border-bottom-color: var(--color-navy);
    margin-bottom: clamp(2rem, 5vw, 3.5rem);
    padding-bottom: 1.25rem;
  }

  .section-heading h2 {
    font-size: clamp(2rem, 4vw, 3.2rem);
  }

  .section-index {
    margin-bottom: 0.55rem;
  }

  .form-section {
    padding-bottom: clamp(2.5rem, 5vw, 4rem);
  }

  .form-section + .form-section {
    padding-top: clamp(2.5rem, 5vw, 4rem);
  }

  .form-section legend {
    color: var(--color-navy-deep);
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 500;
    margin-bottom: 2rem;
  }

  .form-section legend span {
    color: var(--color-accent);
    display: block;
    font-family: var(--font-sans);
    font-size: 0.62rem;
    font-weight: 800;
    letter-spacing: 0.2em;
    margin-bottom: 0.35rem;
  }

  .form-grid {
    column-gap: clamp(2rem, 5vw, 4rem);
    row-gap: 2rem;
  }

  .field-label {
    color: var(--color-muted);
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.12em;
  }

  .form-field input,
  .form-field select {
    background-color: transparent;
    border-color: var(--color-border);
    border-radius: 2px;
    color: var(--color-navy-deep);
    font-size: 1.05rem;
    min-height: 3.25rem;
    padding: 0.7rem 0.9rem;
  }

  .form-field input::placeholder {
    color: #a7afb6;
    font-size: var(--font-size-sm);
    font-weight: 400;
    opacity: 1;
  }

  .form-field input:focus,
  .form-field select:focus {
    border-color: var(--color-navy);
    box-shadow: 0 0 0 1px var(--color-navy);
  }

  .form-field input[type="number"] {
    appearance: textfield;
  }

  .form-field input[type="number"]::-webkit-inner-spin-button,
  .form-field input[type="number"]::-webkit-outer-spin-button {
    appearance: none;
    margin: 0;
  }

  .field-hint,
  .voltage-total {
    color: var(--color-subtle);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.02em;
  }

  .load-input-grid {
    gap: 0;
    border-left: 1px solid var(--color-border);
    border-top: 1px solid var(--color-border);
  }

  .load-input-card {
    border: 0;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
    border-right: 1px solid var(--color-border);
    min-height: 15rem;
    padding: clamp(1.5rem, 3vw, 2.25rem);
  }

  .load-input-card .load-code,
  .additional-loads .load-code,
  .result-panel header span {
    letter-spacing: 0.2em;
  }

  .source-guidance,
  .calculation-boundary-note {
    background: transparent;
    border-bottom: 1px solid var(--color-border);
    border-left-color: var(--color-accent);
    margin-top: 2rem;
    padding: 1.25rem 1.5rem;
  }

  .calculation-boundary-note span {
    background: transparent;
    border: 1px solid var(--color-navy);
    border-radius: 50%;
    color: var(--color-navy);
  }

  .additional-load-row,
  .empty-load-message {
    border-radius: 2px;
  }

  .form-actions {
    gap: 1rem;
    padding-top: 2.5rem;
  }

  .button {
    border-radius: 2px;
    min-height: 2.875rem;
  }

  .button-primary {
    min-width: 11rem;
  }

  .result-screen {
    padding-top: clamp(5rem, 10vw, 8rem);
  }

  .result-screen:not([hidden]) {
    animation: result-enter 220ms ease-out both;
  }

  .result-overview {
    border-bottom: 1px solid var(--color-navy);
    border-top: 1px solid var(--color-navy);
    gap: 0;
    grid-template-columns: 1.5fr repeat(4, minmax(0, 1fr));
  }

  .primary-result-card,
  .result-metric-card {
    background: transparent;
    border: 0;
    border-radius: 0;
    border-right: 1px solid var(--color-border);
    min-height: 13.5rem;
    padding: clamp(1.35rem, 2.5vw, 2rem);
  }

  .result-overview > article:last-child {
    border-right: 0;
  }

  .primary-result-card {
    background: var(--color-navy-deep);
    color: #fff;
    position: relative;
  }

  .primary-result-card::before {
    background: var(--color-accent);
    content: "";
    height: 2px;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
  }

  .primary-result-card strong {
    font-size: clamp(2.8rem, 5vw, 4.5rem);
    letter-spacing: -0.035em;
    margin-top: 1.5rem;
  }

  .result-metric-card > span,
  .primary-result-card > span {
    margin-bottom: 1.5rem;
  }

  .result-metric-card strong {
    font-family: var(--font-serif);
    font-size: clamp(1.25rem, 2vw, 1.65rem);
    font-weight: 500;
  }

  .result-metric-card small {
    line-height: 1.55;
  }

  .result-detail-grid {
    gap: 1px;
    background: var(--color-border);
    border: 1px solid var(--color-border);
    margin-top: 2.5rem;
  }

  .result-panel {
    border: 0;
    border-radius: 0;
    padding: clamp(1.5rem, 3vw, 2.5rem);
  }

  .result-identities {
    align-items: flex-end;
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem 2.5rem;
    justify-content: flex-end;
  }

  .result-identities p {
    margin: 0;
    max-width: 18rem;
    text-align: right;
  }

  .result-identities span {
    color: var(--color-subtle);
    display: block;
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: 0.16em;
  }

  .result-identities b {
    color: var(--color-navy-deep);
    display: block;
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.35;
    overflow-wrap: anywhere;
  }

  .result-actions {
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 2rem;
    padding: 1.25rem 0;
  }

  .result-actions .share-status {
    color: var(--color-muted);
    flex: 1 1 100%;
    font-size: var(--font-size-xs);
    min-height: 1.3em;
  }

  .result-consultation-cta {
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
    padding: 1.1rem 0 1.25rem;
  }

  .result-consultation-cta p {
    color: var(--color-muted);
    flex: 1 1 18rem;
    font-size: var(--font-size-sm);
    margin: 0;
  }

  .result-consultation-cta .consultation-link {
    max-width: 100%;
    text-align: center;
    text-decoration: none;
    white-space: normal;
  }

  .history-export-panel {
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    display: grid;
    gap: 0.75rem 1.5rem;
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 1.25rem 0;
  }

  .history-export-panel h3 {
    color: var(--color-navy-deep);
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.2rem;
  }

  .history-export-panel p,
  .history-export-panel > div > span,
  .history-export-status {
    color: var(--color-muted);
    font-size: var(--font-size-xs);
    margin-bottom: 0;
  }

  .history-export-panel > div > span {
    color: var(--color-accent);
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: 0.16em;
  }

  .history-export-actions {
    display: flex;
    gap: 0.5rem;
  }

  .history-export-status {
    grid-column: 1 / -1;
    min-height: 1.3em;
  }

  .discharge-pattern-panel {
    max-width: 100%;
    min-width: 0;
  }

  .pdf-exporting .pdf-report {
    display: block;
    left: -10000px;
    position: fixed;
    top: 0;
    z-index: -1;
  }

  body.pdf-preview-open {
    overflow: hidden;
  }

  .pdf-preview-dialog {
    background: transparent;
    border: 0;
    height: min(94dvh, 920px);
    max-height: none;
    max-width: none;
    overflow: visible;
    padding: 0;
    width: min(74rem, calc(100vw - 2rem));
  }

  .pdf-preview-dialog::backdrop {
    background: rgba(7, 29, 49, 0.52);
  }

  .pdf-preview-shell {
    background: var(--color-surface-muted);
    border: 1px solid rgba(255, 255, 255, 0.42);
    box-shadow: 0 28px 90px rgba(7, 29, 49, 0.28);
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    height: 100%;
    overflow: hidden;
  }

  .pdf-preview-header,
  .pdf-preview-actions {
    align-items: center;
    background: var(--color-surface);
    display: flex;
    gap: 1rem;
    padding: 1rem 1.25rem;
  }

  .pdf-preview-header {
    border-bottom: 1px solid var(--color-border);
    justify-content: space-between;
  }

  .pdf-preview-header p {
    color: var(--color-accent);
    font-size: 0.625rem;
    font-weight: 800;
    letter-spacing: 0.18em;
    margin-bottom: 0.1rem;
  }

  .pdf-preview-header h2 {
    color: var(--color-navy-deep);
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: 0;
  }

  .pdf-preview-header span,
  .pdf-preview-actions > span {
    color: var(--color-muted);
    font-size: var(--font-size-xs);
  }

  .pdf-preview-header span {
    display: block;
    margin-top: 0.15rem;
    overflow-wrap: anywhere;
  }

  .pdf-preview-close-icon {
    align-items: center;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-navy);
    display: inline-flex;
    flex: 0 0 auto;
    font-size: 1.35rem;
    height: 2.5rem;
    justify-content: center;
    line-height: 1;
    width: 2.5rem;
  }

  .pdf-preview-close-icon:hover {
    border-color: var(--color-navy-soft);
  }

  .pdf-preview-stage {
    align-items: center;
    background: #dfe3e6;
    display: flex;
    justify-content: center;
    min-height: 0;
    overflow: hidden;
    padding: 1rem;
  }

  .pdf-preview-frame {
    aspect-ratio: 210 / 297;
    background: #fff;
    border: 1px solid var(--color-border-strong);
    box-shadow: 0 10px 32px rgba(7, 29, 49, 0.16);
    height: auto;
    max-width: 100%;
    width: min(100%, calc((94dvh - 9rem) * 210 / 297));
  }

  .pdf-preview-actions {
    border-top: 1px solid var(--color-border);
    justify-content: flex-end;
  }

  .pdf-preview-actions > span {
    margin-right: auto;
  }

  .app-footer {
    padding-bottom: 3rem;
    padding-top: 3rem;
  }

  @keyframes result-enter {
    from {
      opacity: 0;
      transform: translateY(8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

@media screen and (max-width: 1020px) {
  .result-overview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .primary-result-card {
    grid-column: span 2;
    min-height: 12rem;
  }

  .result-overview > article {
    border-bottom: 1px solid var(--color-border);
  }

  .result-overview > article:nth-child(odd):not(:first-child) {
    border-right: 0;
  }
}

@media screen and (max-width: 720px) {
  .app-header {
    min-height: 4.25rem;
  }

  .app-main {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .hero-section {
    border-left: 0;
    padding: 4rem 0 3.5rem;
  }

  .hero-section h1 {
    font-size: clamp(2.35rem, 12vw, 3.25rem);
  }

  .hero-section > p:not(.eyebrow) {
    font-size: 0.95rem;
    line-height: 1.85;
  }

  .input-screen {
    border-left: 0;
    border-right: 0;
    box-shadow: none;
    margin-left: -1rem;
    margin-right: -1rem;
    padding: 2.5rem 1.25rem;
  }

  .section-heading {
    gap: 1rem;
    margin-bottom: 2.5rem;
  }

  .section-heading h2 {
    font-size: 2.2rem;
  }

  .form-section {
    padding-bottom: 3.25rem;
  }

  .form-section + .form-section {
    padding-top: 3.25rem;
  }

  .form-grid,
  .load-input-grid,
  .operation-fields,
  .result-overview {
    grid-template-columns: 1fr;
  }

  .load-input-card {
    min-height: 0;
    padding: 1.5rem 1.25rem 1.75rem;
  }

  .operation-fields {
    gap: 1.25rem;
  }

  .form-field input,
  .form-field select {
    font-size: 1.0625rem;
    min-height: 3.25rem;
  }

  .form-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .form-actions .button {
    min-height: 3rem;
    width: 100%;
  }

  .result-identities {
    align-items: flex-start;
    justify-content: flex-start;
    width: 100%;
  }

  .result-identities p {
    max-width: 100%;
    text-align: left;
  }

  .result-actions {
    align-items: stretch;
    flex-direction: column;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .result-actions .button {
    min-height: 3rem;
    width: 100%;
  }

  .history-export-panel {
    align-items: stretch;
    grid-template-columns: 1fr;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .history-export-actions {
    flex-direction: column;
  }

  .history-export-actions .button {
    min-height: 3rem;
    width: 100%;
  }

  .history-export-status {
    grid-column: 1;
  }

  .pdf-preview-dialog {
    height: calc(100dvh - 1rem);
    width: calc(100vw - 1rem);
  }

  .pdf-preview-header,
  .pdf-preview-actions {
    padding: 0.75rem;
  }

  .pdf-preview-header h2 {
    font-size: 1.05rem;
  }

  .pdf-preview-stage {
    padding: 0.5rem;
  }

  .pdf-preview-actions {
    flex-wrap: wrap;
  }

  .pdf-preview-actions > span {
    flex: 1 1 100%;
  }

  .pdf-preview-actions .button {
    flex: 1 1 calc(50% - 0.5rem);
  }

  .result-screen {
    margin-left: -1rem;
    margin-right: -1rem;
    padding-top: 5rem;
  }

  .result-screen > .section-heading {
    margin-left: 1.25rem;
    margin-right: 1.25rem;
  }

  .result-overview {
    border-bottom-color: var(--color-border);
    border-top-color: var(--color-navy);
  }

  .primary-result-card,
  .result-metric-card {
    border-bottom: 1px solid var(--color-border);
    border-right: 0;
    min-height: 0;
    padding: 1.75rem 1.25rem;
  }

  .primary-result-card {
    grid-column: auto;
    min-height: 12.5rem;
    padding-top: 2rem;
  }

  .primary-result-card strong {
    font-size: clamp(3.2rem, 16vw, 4.25rem);
  }

  .result-metric-card {
    display: grid;
    gap: 0.35rem 1rem;
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .result-metric-card > span,
  .result-metric-card h3 {
    grid-column: 1;
  }

  .result-metric-card > span {
    margin-bottom: 0.25rem;
  }

  .result-metric-card h3 {
    margin-bottom: 0;
  }

  .result-metric-card > strong {
    align-self: center;
    grid-column: 2;
    grid-row: 1 / span 2;
    text-align: right;
  }

  .result-metric-card > small {
    grid-column: 1 / -1;
  }

  .result-detail-grid {
    border-left: 0;
    border-right: 0;
    margin-top: 2rem;
  }

  .result-panel {
    padding: 2rem 1.25rem;
  }

  .discharge-pattern-panel .discharge-pattern-chart {
    max-width: 100%;
    min-width: 0;
  }
}

@media screen and (max-height: 520px) and (orientation: landscape) {
  .app-header {
    min-height: 3.75rem;
    position: static;
  }

  .hero-section {
    padding-bottom: 2.5rem;
    padding-top: 2.5rem;
  }

  .hero-section h1 {
    font-size: 2.6rem;
  }

  .input-screen {
    padding-bottom: 2.5rem;
    padding-top: 2.5rem;
  }

  .form-grid,
  .load-input-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .result-screen:not([hidden]) {
    animation: none;
  }
}

/* =========================
   11. MOBILE TECHNICAL SHEET
   Screen-only; the PDF report remains unchanged.
   ========================= */

@media screen {
  .mobile-document-index,
  .load-profile-sequence {
    display: none;
  }
}

@media screen and (max-width: 720px) {
  html,
  body {
    max-width: 100%;
    overflow-x: clip;
  }

  body {
    background: #fff;
  }

  body.pdf-exporting {
    overflow: visible;
  }

  .app-header {
    background: rgba(255, 255, 255, 0.97);
    border-bottom-color: #dfe3e6;
  }

  .app-main {
    padding-bottom: 5rem;
  }

  .hero-section {
    border-bottom: 1px solid var(--color-border);
    padding: 3.75rem 0 2.25rem;
  }

  .hero-section .eyebrow {
    font-size: 0.58rem;
    letter-spacing: 0.24em;
    margin-bottom: 0.85rem;
  }

  .hero-section h1 {
    font-family: var(--font-sans);
    font-size: clamp(2rem, 10vw, 2.75rem);
    font-weight: 500;
    letter-spacing: -0.035em;
    line-height: 1.08;
    margin-bottom: 1rem;
  }

  .hero-section > p:not(.eyebrow) {
    font-size: 0.8rem;
    line-height: 1.75;
    margin-bottom: 0;
    max-width: 22rem;
  }

  .application-status {
    font-size: 0.7rem;
    margin-top: 1.25rem;
    min-height: 0;
  }

  .application-status:empty {
    display: none;
  }

  .mobile-document-index {
    border-bottom: 1px solid var(--color-navy);
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin: 0 -1rem;
    padding: 1.1rem 1rem 0;
  }

  .mobile-document-brand {
    color: var(--color-navy-deep);
    display: flex;
    font-size: 0.61rem;
    font-weight: 800;
    grid-column: 1 / -1;
    justify-content: space-between;
    letter-spacing: 0.17em;
    margin-bottom: 1rem;
  }

  .mobile-document-brand b {
    font-weight: 500;
  }

  .mobile-document-index a {
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 0.54rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    min-width: 0;
    padding: 0.8rem 0.25rem 0.75rem;
    text-decoration: none;
    white-space: nowrap;
  }

  .mobile-document-index a b {
    color: var(--color-subtle);
    display: block;
    font-size: 0.55rem;
    margin-bottom: 0.15rem;
  }

  .mobile-document-index a.is-current {
    border-top-color: var(--color-accent);
    color: var(--color-navy-deep);
  }

  .mobile-document-index a.is-current b {
    color: var(--color-accent);
  }

  .mobile-document-index[data-mode="generatorStarting"],
  .mobile-document-index[data-mode="emergencyLighting"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mobile-document-index[data-mode="generatorStarting"] a[href="#load-profile-section"],
  .mobile-document-index[data-mode="emergencyLighting"] a[href="#load-profile-section"] {
    display: none;
  }

  .input-screen {
    background: #fff;
    border-bottom: 0;
    padding: 3.5rem 1.25rem 0;
  }

  .section-heading {
    border-bottom: 1px solid var(--color-navy-deep);
    margin-bottom: 3.5rem;
    padding-bottom: 1.15rem;
  }

  .section-heading h2 {
    font-family: var(--font-sans);
    font-size: 1.85rem;
    font-weight: 500;
    letter-spacing: -0.025em;
  }

  .section-heading p:last-child {
    color: var(--color-subtle);
    font-size: 0.68rem;
    line-height: 1.65;
  }

  .form-section {
    border-bottom-color: var(--color-navy-deep);
    padding-bottom: 4rem;
  }

  .form-section + .form-section {
    padding-top: 4rem;
  }

  .form-section legend {
    font-family: var(--font-sans);
    font-size: 1.3rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    margin-bottom: 2.5rem;
  }

  .form-section legend span {
    font-size: 0.56rem;
    letter-spacing: 0.24em;
    margin-bottom: 0.55rem;
  }

  .form-grid {
    gap: 0;
  }

  .form-grid .form-field {
    border-top: 1px solid var(--color-border);
    gap: 0.4rem;
    padding: 1.2rem 0 1.35rem;
  }

  .form-grid .form-field:last-child {
    border-bottom: 1px solid var(--color-border);
  }

  .project-input-grid .form-field {
    padding-bottom: 1.1rem;
    padding-top: 1.1rem;
  }

  .field-label {
    color: var(--color-muted);
    font-size: 0.59rem;
    letter-spacing: 0.16em;
    line-height: 1.4;
    text-transform: uppercase;
  }

  .form-field input,
  .form-field select {
    border: 0;
    border-bottom: 1px solid var(--color-border-strong);
    border-radius: 0;
    color: var(--color-navy-deep);
    font-size: 1.45rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    min-height: 3.35rem;
    min-width: 0;
    padding: 0.55rem 0;
  }

  .project-input-grid .form-field input {
    font-size: 1rem;
    letter-spacing: 0;
  }

  .form-field select {
    padding-right: 0.5rem;
  }

  .form-field input:focus,
  .form-field select:focus {
    border-color: var(--color-navy-deep);
    box-shadow: 0 1px 0 var(--color-navy-deep);
  }

  .input-with-unit,
  .technical-value-input {
    border-bottom: 1px solid var(--color-border-strong);
    min-width: 0;
  }

  .input-with-unit input,
  .technical-value-input input {
    border: 0;
    box-shadow: none;
    font-size: 1.8rem;
    min-width: 0;
    padding-left: 0;
  }

  .input-with-unit > span,
  .technical-value-input > span {
    align-items: flex-end;
    background: transparent;
    border: 0;
    color: var(--color-muted);
    font-size: 0.62rem;
    font-weight: 800;
    height: auto;
    letter-spacing: 0.14em;
    min-width: 2.75rem;
    padding: 0 0 0.85rem 0.5rem;
  }

  .field-error {
    line-height: 1.55;
    max-width: 100%;
    min-height: 0;
    overflow-wrap: anywhere;
  }

  .field-error:not(:empty) {
    margin-top: 0.2rem;
  }

  .field-error:empty {
    display: none;
  }

  .voltage-total,
  .field-hint {
    font-size: 0.62rem;
    line-height: 1.55;
  }

  .source-guidance {
    border: 0;
    border-bottom: 1px solid var(--color-border);
    margin-top: 1.25rem;
    padding: 0.85rem 0;
  }

  .source-guidance p,
  .calculation-boundary-note p {
    font-size: 0.65rem;
    line-height: 1.65;
  }

  .load-profile-sequence {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin: -0.5rem 0 2.5rem;
  }

  .load-profile-sequence span {
    border-top: 1px solid var(--color-border-strong);
    min-width: 0;
    padding: 0.75rem 0.25rem 0;
    position: relative;
  }

  .load-profile-sequence span:first-child {
    border-top-color: var(--color-accent);
  }

  .load-profile-sequence span::before {
    background: var(--color-border-strong);
    border-radius: 50%;
    content: "";
    height: 5px;
    left: 0;
    position: absolute;
    top: -3px;
    width: 5px;
  }

  .load-profile-sequence span:first-child::before,
  .load-profile-sequence span:last-child::before {
    background: var(--color-accent);
  }

  .load-profile-sequence b,
  .load-profile-sequence small {
    display: block;
  }

  .load-profile-sequence b {
    color: var(--color-navy-deep);
    font-size: 0.72rem;
    letter-spacing: 0.15em;
  }

  .load-profile-sequence small {
    color: var(--color-subtle);
    font-size: 0.48rem;
    letter-spacing: 0.06em;
    margin-top: 0.2rem;
    overflow-wrap: anywhere;
  }

  .load-input-grid {
    border: 0;
    gap: 0;
    position: relative;
  }

  .load-input-grid::before {
    background: var(--color-border);
    bottom: 0;
    content: "";
    left: 0.25rem;
    position: absolute;
    top: 0;
    width: 1px;
  }

  .load-input-card {
    border: 0;
    border-bottom: 1px solid var(--color-border);
    min-height: 0;
    padding: 1.75rem 0 2rem 1.5rem;
    position: relative;
  }

  .load-input-card::before {
    background: #fff;
    border: 1px solid var(--color-border-strong);
    border-radius: 50%;
    content: "";
    height: 7px;
    left: 1px;
    position: absolute;
    top: 2rem;
    width: 7px;
  }

  .timeline-load-card::before {
    background: var(--color-accent);
    border-color: var(--color-accent);
  }

  .load-input-card .load-code {
    font-size: 0.55rem;
    letter-spacing: 0.19em;
    margin-bottom: 0.5rem;
  }

  .load-input-card h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
  }

  .load-input-card > p {
    font-size: 0.65rem;
    line-height: 1.65;
    margin-bottom: 1.25rem;
  }

  .load-input-card .form-field {
    gap: 0.35rem;
  }

  .operation-fields {
    gap: 1.5rem;
  }

  .additional-loads {
    margin-top: 3.5rem;
    padding-top: 2rem;
  }

  .additional-loads > header {
    gap: 1.25rem;
  }

  .additional-loads header p,
  .empty-load-message {
    font-size: 0.65rem;
    line-height: 1.65;
  }

  .empty-load-message,
  .additional-load-row,
.emergency-lighting-row {
    background: transparent;
    border-left: 0;
    border-right: 0;
  }

  .calculation-boundary-note {
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    border-left: 0;
    border-top: 1px solid var(--color-border);
    margin-top: 2rem;
    padding: 1rem 0;
  }

  .calculation-boundary-note span {
    border-color: var(--color-accent);
    border-radius: 0;
    color: var(--color-accent);
    height: 1.75rem;
  }

  .form-actions {
    border-bottom: 1px solid var(--color-navy-deep);
    gap: 0;
    padding: 2.75rem 0 0;
  }

  .form-actions .button-primary {
    border-radius: 0;
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    min-height: 4.25rem;
  }

  .form-actions .button-quiet {
    font-size: 0.68rem;
    min-height: 3.5rem;
  }

  .result-screen {
    background: #fff;
    padding-top: 5.5rem;
  }

  .result-screen > .section-heading {
    margin-bottom: 2.5rem;
  }

  .result-overview {
    border-top: 1px solid var(--color-navy-deep);
  }

  .primary-result-card {
    min-height: 14rem;
    padding: 2rem 1.5rem;
  }

  .primary-result-card > span {
    letter-spacing: 0.2em;
  }

  .primary-result-card h3 {
    font-size: 0.75rem;
    font-weight: 500;
  }

  .primary-result-card strong {
    font-family: var(--font-sans);
    font-size: clamp(3rem, 15vw, 4.1rem);
    font-weight: 300;
    letter-spacing: -0.055em;
    line-height: 1;
    margin-top: 2rem;
    overflow-wrap: anywhere;
  }

  .result-metric-card {
    display: block;
    padding: 1.65rem 1.25rem 1.85rem;
  }

  .result-metric-card > span {
    margin-bottom: 1rem;
  }

  .result-metric-card h3 {
    color: var(--color-muted);
    font-size: 0.63rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 0.65rem;
  }

  .result-metric-card > strong {
    font-family: var(--font-sans);
    font-size: clamp(1.65rem, 8vw, 2.25rem);
    font-weight: 400;
    letter-spacing: -0.035em;
    line-height: 1.15;
    overflow-wrap: anywhere;
    text-align: left;
  }

  .result-metric-card > small {
    font-size: 0.65rem;
    margin-top: 0.55rem;
  }

  .result-actions,
  .history-export-panel {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .fire-safety-result {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .calculation-mode-options,
  .generator-result-grid {
    grid-template-columns: 1fr;
  }

  .calculation-mode-options label {
    align-items: center;
    min-height: 3.75rem;
    padding: 1rem 0;
  }

  .calculation-mode-options input {
    height: 1.2rem;
    width: 1.2rem;
  }

  .emergency-lighting-total-field {
    margin-top: 0.8rem;
  }

  .emergency-lighting-total-value strong {
    font-size: 2rem;
  }

  .fire-safety-result dl {
    grid-template-columns: 1fr;
  }

  .fire-safety-result dl div,
  .fire-safety-result dl div:first-child {
    border-left: 0;
    border-top: 1px solid var(--color-border);
    padding: 0.8rem 0;
  }

  .result-detail-grid,
  .result-panel,
  .calculation-case,
  .sba-equation,
  .history-export-panel,
  .result-actions {
    max-width: 100%;
    min-width: 0;
  }

  .calculation-case,
  .sba-equation,
  .result-panel,
  .history-export-panel {
    overflow-wrap: anywhere;
  }

  .app-footer {
    padding-bottom: 3rem;
    padding-top: 3rem;
  }
}


.battery-result-card .result-battery-alternative {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .12rem;
  margin-top: .45rem;
  color: var(--color-navy-soft);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .03em;
  line-height: 1.25;
}

.battery-result-card .result-battery-alternative > span {
  display: block;
  white-space: nowrap;
}

.alternative-battery-panel {
  border-color: var(--color-border);
  background: var(--color-surface);
}

.alternative-battery-panel header span {
  color: var(--color-muted);
  font-weight: 700;
}

.alternative-battery {
  align-items: baseline;
  display: flex;
  flex-wrap: wrap;
  gap: .35rem .75rem;
}

.alternative-battery > span {
  color: var(--color-muted);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  width: 100%;
}

.alternative-battery > strong {
  color: var(--color-navy-deep);
  font-family: var(--font-serif);
  font-size: 1.55rem;
  font-weight: 500;
  line-height: 1.2;
}

.alternative-battery > small {
  color: var(--color-muted);
  font-size: .82rem;
  font-weight: 600;
}

.generator-starting-result #result-generator-alternative {
  color: inherit;
  font-size: inherit;
  font-weight: 700;
  white-space: nowrap;
}


/* Public result screen: calculation history export is intentionally private/internal. */
.history-export-panel { display: none !important; }

/* =========================================================
   GENERATOR STARTING — FINAL DATA SHEET / WEB NEIGHBOR CARDS
   Keep the established FACILINEX visual language; generator-only.
   ========================================================= */
.generator-battery-neighbors {
  margin-top: 1.5rem;
  padding: 1.5rem;
}

.generator-battery-neighbor-row {
  align-items: stretch;
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 1rem;
  margin-top: .9rem;
}

.generator-battery-neighbor-series {
  align-items: center;
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  color: var(--color-navy-deep);
  display: flex;
  font-size: .8rem;
  font-weight: 700;
  justify-content: flex-start;
  padding: 1rem;
}

.generator-battery-neighbor-series::first-line {
  letter-spacing: .08em;
}

.generator-battery-neighbor-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .75rem;
}

.generator-battery-neighbor-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: .45rem;
  box-shadow: 0 6px 18px rgba(11, 34, 55, .06);
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 6.4rem;
  padding: 1rem 1.1rem;
  position: relative;
}

.generator-battery-neighbor-card > span {
  color: var(--color-muted);
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .08em;
  margin-bottom: .35rem;
}

.generator-battery-neighbor-card > strong {
  color: var(--color-navy-deep);
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 500;
  line-height: 1.15;
}

.generator-battery-neighbor-card > small {
  color: var(--color-muted);
  font-size: .72rem;
  line-height: 1.35;
  margin-top: .25rem;
}

.generator-battery-neighbor-card.is-recommended {
  background: var(--color-navy-deep);
  border-color: var(--color-navy-deep);
  box-shadow: 0 8px 22px rgba(11, 34, 55, .14);
}

.generator-battery-neighbor-card.is-recommended::before {
  background: var(--color-accent);
  border-radius: .45rem 0 0 .45rem;
  bottom: 0;
  content: "";
  left: 0;
  position: absolute;
  top: 0;
  width: .28rem;
}

.generator-battery-neighbor-card.is-recommended > span,
.generator-battery-neighbor-card.is-recommended > strong,
.generator-battery-neighbor-card.is-recommended > small {
  color: #fff;
}

.generator-battery-neighbor-card.is-recommended > span {
  color: var(--color-accent);
}

/* Generator PDF: reproduce the approved A4 technical-sheet composition. */
.pdf-report.generator-report .report-title {
  display: block;
  margin-top: 10mm;
  padding-bottom: 5mm;
}

.pdf-report.generator-report .report-title h1 {
  font-size: 25pt;
}

.pdf-report.generator-report .report-tagline {
  color: var(--color-navy-deep);
  font-family: var(--font-serif);
  font-size: 9pt;
  font-weight: 500;
  letter-spacing: .04em;
  margin-top: 2.5mm;
}

.pdf-report.generator-report .report-title-meta {
  border-left: 0;
  border-top: .2mm solid var(--color-border-strong);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 4mm;
  min-height: 0;
  padding: 3mm 0 0;
}

.pdf-report.generator-report .report-title-meta .report-meta-item {
  padding-left: 4mm;
}

.pdf-report.generator-report .report-title-meta .report-meta-item:first-child {
  border-left: 0;
  padding-left: 0;
}

.pdf-report.generator-report .result-formula {
  margin-top: 2mm;
}

.pdf-report.generator-report .power-summary {
  margin-top: 2.5mm;
}

.pdf-report.generator-report .report-battery-neighbors {
  margin-top: 3.5mm;
}

.pdf-report .report-battery-neighbors .report-section-label {
  margin-bottom: 1.5mm;
}

.pdf-report .battery-neighbor-row {
  align-items: stretch;
  display: grid;
  grid-template-columns: 18mm minmax(0, 1fr);
  gap: 2mm;
  margin-top: 1.2mm;
}

.pdf-report .battery-neighbor-series {
  align-items: center;
  background: var(--color-surface-soft);
  border: .2mm solid var(--color-border);
  display: flex;
  font-size: 6.2pt;
  font-weight: 700;
  padding: 2mm;
}

.pdf-report .battery-neighbor-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5mm;
}

.pdf-report .battery-neighbor-card {
  border: .2mm solid var(--color-border);
  border-radius: 1.2mm;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 12mm;
  padding: 1.7mm 2.2mm;
  position: relative;
}

.pdf-report .battery-neighbor-card > span {
  color: var(--color-muted);
  font-size: 4.2pt;
  font-weight: 700;
  line-height: 1.2;
}

.pdf-report .battery-neighbor-card > strong {
  font-family: var(--font-serif);
  font-size: 8.2pt;
  font-weight: 500;
  line-height: 1.15;
  margin-top: .8mm;
}

.pdf-report .battery-neighbor-card > small {
  color: var(--color-muted);
  font-size: 4.5pt;
  line-height: 1.2;
  margin-top: .5mm;
}

.pdf-report .battery-neighbor-card.is-recommended {
  background: var(--color-navy-deep);
  border-color: var(--color-navy-deep);
}

.pdf-report .battery-neighbor-card.is-recommended::before {
  background: var(--color-accent);
  bottom: 0;
  content: "";
  left: 0;
  position: absolute;
  top: 0;
  width: .8mm;
}

.pdf-report .battery-neighbor-card.is-recommended > span,
.pdf-report .battery-neighbor-card.is-recommended > strong,
.pdf-report .battery-neighbor-card.is-recommended > small {
  color: #fff;
}

.pdf-report .battery-neighbor-card.is-recommended > span {
  color: var(--color-accent);
}

.pdf-report.generator-report .report-discharge-pattern {
  margin-top: 4mm;
}

.pdf-report.generator-report .report-pattern-note {
  color: var(--color-navy-deep);
  font-size: 6.4pt;
  font-weight: 600;
  margin: 0 0 1mm;
}

.pdf-report.generator-report .report-generator-reference {
  background: var(--color-surface-soft);
  border-radius: 1.5mm;
  float: right;
  font-size: 4.7pt;
  line-height: 1.45;
  margin: 0 0 1mm 4mm;
  padding: 2.5mm;
  width: 43mm;
}

.pdf-report.generator-report .report-generator-reference b {
  color: var(--color-navy-deep);
}

.pdf-report.generator-report .report-generator-reference p {
  margin: 1.2mm 0 0;
}

.pdf-report.generator-report .report-generator-reference .reference-secondary b {
  color: var(--color-accent);
}

.pdf-report.generator-report .report-discharge-pattern .discharge-pattern-chart {
  height: 46mm;
}

.pdf-report.generator-report .technical-data {
  margin-top: 3mm;
}

@media (max-width: 720px) {
  .generator-battery-neighbor-row {
    grid-template-columns: 1fr;
  }
  .generator-battery-neighbor-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .generator-battery-neighbor-card {
    padding: .8rem;
  }
  .generator-battery-neighbor-card > strong {
    font-size: 1.05rem;
  }
}