/* --------------------------------
   DESIGN SYSTEM
-------------------------------- */
/* Minimum supported browsers: Chrome 111+, Firefox 113+, Safari 16.2+.
  color-mix(in srgb, ...) is used throughout for theme-adaptive tints. */

* {
  box-sizing: border-box;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 120;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: var(--color-bg);
  transform: translateY(-140%);
  transition: transform var(--transition-fast);
}

.skip-link:focus {
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-soft: #4a4a4a;
  --color-border: #e5e5e5;
  --color-accent: #3a86ff;
  --color-success: #2ecc71;
  --color-warning: #ffb703;
  --color-error: #d62828;

  --radius-sm: 6px;
  --radius-md: 8px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --shadow-soft: 0 12px 30px rgba(26, 26, 26, 0.05);
  --transition-fast: 160ms ease;
  --transition-med: 220ms ease;
}

body.mode-light {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-soft: #4a4a4a;
  --color-border: #e5e5e5;
  --color-accent: #3a86ff;
  --color-success: #2ecc71;
  --color-warning: #ffb703;
  --color-error: #d62828;
  --shadow-soft: 0 12px 30px rgba(26, 26, 26, 0.05);
}

body.mode-dark {
  --color-bg: #121417;
  --color-text: #f5f7fa;
  --color-text-soft: #c7ced6;
  --color-border: #2b3239;
  --color-accent: #70acff;
  --color-success: #4fd78a;
  --color-warning: #ffc13d;
  --color-error: #ff6e6e;
  --shadow-soft: 0 14px 36px rgba(0, 0, 0, 0.32);
}

body.contrast-high.mode-light {
  --color-bg: #ffffff;
  --color-text: #000000;
  --color-text-soft: #111111;
  --color-border: #101010;
  --color-accent: #0046d5;
  --color-success: #0a8f38;
  --color-warning: #9a5f00;
  --color-error: #b50000;
  --shadow-soft: none;
}

body.contrast-high.mode-dark {
  --color-bg: #000000;
  --color-text: #ffffff;
  --color-text-soft: #f3f3f3;
  --color-border: #ffffff;
  --color-accent: #8abaff;
  --color-success: #80ffb6;
  --color-warning: #ffd369;
  --color-error: #ffa0a0;
  --shadow-soft: none;
}

body.density-compact {
  --space-3: 10px;
  --space-4: 14px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
}

body.density-compact {
  font-size: 15px;
  line-height: 1.45;
}

body.density-compact .page-header,
body.density-compact .planner,
body.density-compact .group-card,
body.density-compact .toc,
body.density-compact .cover {
  padding: clamp(18px, 2.4vw, 30px);
}

body.density-compact .display-btn {
  min-height: 36px;
  padding: 6px 12px;
  font-size: 0.84rem;
}

body.density-compact .primary-btn {
  min-height: 40px;
  margin-top: var(--space-4);
  padding: 8px 14px;
}

body.density-compact input[type="number"],
body.density-compact input[type="text"],
body.density-compact input[type="email"],
body.density-compact input[type="search"],
body.density-compact textarea,
body.density-compact select {
  min-height: 38px;
  padding: 8px 10px;
}

body.density-compact .door-card summary,
body.density-compact .collapsible-card summary {
  padding: var(--space-3) var(--space-4);
}

body.density-compact .door-row,
body.density-compact .group-card-body {
  padding: var(--space-4);
}

body.density-compact th,
body.density-compact td {
  padding: 9px 10px;
}

body.density-compact .step {
  padding: var(--space-3);
  column-gap: var(--space-3);
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  padding: clamp(24px, 3vw, 48px);
  color: var(--color-text);
  background:
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--color-accent) 9%, transparent), transparent 42%),
    var(--color-bg);
  font-family: "Inter", "Roboto", "SF Pro Text", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: 0.01em;

  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-6);
  counter-reset: step;
  overflow-x: hidden;
}

img,
svg {
  max-width: 100%;
}

body > * {
  grid-column: 2 / -2;
  margin: 0;
}

main {
  display: grid;
  gap: var(--space-5);
}

@media (max-width: 1100px) {
  body > * {
    grid-column: 1 / -1;
  }
}

/* --------------------------------
   TYPOGRAPHY
-------------------------------- */
h1,
h2,
h3 {
  margin: 0;
  color: var(--color-text);
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 3.2vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h2 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h3 {
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

p,
li,
label,
th,
td {
  color: var(--color-text-soft);
}

p {
  margin: var(--space-2) 0 0;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

a:hover,
a:focus-visible {
  color: var(--color-accent);
  border-color: currentColor;
}

/* --------------------------------
   SURFACES
-------------------------------- */
.page-header,
.planner,
.group-card,
.callout,
.toc,
.cover,
.assumptions-panel {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.page-header,
.planner,
.group-card,
.toc,
.cover {
  padding: clamp(24px, 3vw, 40px);
}

.page-header p {
  max-width: 70ch;
}

/* --------------------------------
   NAV / TOOLBARS
-------------------------------- */

.top-nav {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-3);
}

.top-nav-desktop {
  display: none;
}

.menu-trigger-wrap {
  display: flex;
  justify-content: flex-start;
  margin-top: var(--space-2);
  position: sticky;
  top: max(var(--space-2), env(safe-area-inset-top));
  z-index: 30;
}

.menu-trigger-btn {
  min-width: 120px;
}

.mobile-drawer-backdrop {
  display: block;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.34);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  z-index: 44;
}

.mobile-drawer {
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  width: min(88vw, 360px);
  height: 100dvh;
  padding: var(--space-4);
  padding-bottom: calc(var(--space-4) + env(safe-area-inset-bottom, 0px));
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  box-shadow: 12px 0 26px rgba(0, 0, 0, 0.18);
  overflow-y: auto;
  transform: translateX(-102%);
  transition: transform var(--transition-med);
  z-index: 45;
}

.mobile-drawer-backdrop[hidden] {
  display: none !important;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.mobile-drawer-header h2 {
  margin: 0;
  font-size: 1.05rem;
}

.mobile-drawer-controls {
  margin-bottom: var(--space-4);
}

.mobile-drawer-subactions {
  margin-bottom: var(--space-4);
  display: grid;
  gap: var(--space-2);
}

.mobile-drawer-subactions > p {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.mobile-drawer-subactions .menu-subaction-btn {
  min-height: 34px;
  padding: 6px 12px;
  justify-content: center;
  font-size: 0.82rem;
}

.mobile-drawer-controls .display-controls,
.mobile-drawer-controls .toolbar-row {
  width: 100%;
}

.mobile-drawer-controls .display-btn {
  width: 100%;
  justify-content: center;
}

.mobile-drawer .top-nav {
  display: grid;
  grid-template-columns: 1fr;
}

.mobile-drawer .top-nav a {
  grid-column: auto;
  justify-content: flex-start;
  border-radius: var(--radius-sm);
}

.menu-subaction-source,
#export-host,
#collapse-controls-host {
  display: none !important;
}

body.menu-open {
  overflow: hidden;
}

body.menu-open .mobile-drawer {
  transform: translateX(0);
}

body.menu-open .mobile-drawer-backdrop {
  opacity: 1;
  pointer-events: auto;
}

.top-nav a {
  grid-column: span 3;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.9rem;
  font-weight: 700;
  transition: border-color var(--transition-med), background-color var(--transition-med), color var(--transition-med), box-shadow var(--transition-med);
}

.top-nav a:hover,
.top-nav a:focus-visible {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 8%, var(--color-bg));
  color: var(--color-accent);
  box-shadow: 0 10px 20px rgba(58, 134, 255, 0.12);
}

.top-nav a.is-active {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 12%, var(--color-bg));
}

.top-nav a.is-disabled,
.top-nav a[aria-disabled="true"] {
  opacity: 0.48;
  cursor: not-allowed;
  pointer-events: none;
}

.display-controls,
.toolbar-row,
#export-host,
#collapse-controls-host,
.collapsible-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

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

.display-btn,
.primary-btn {
  font: inherit;
}

.display-btn {
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color var(--transition-med), background-color var(--transition-med), color var(--transition-med), box-shadow var(--transition-med);
}

.display-btn:hover,
.display-btn:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: 0 6px 16px rgba(58, 134, 255, 0.12);
}

.assumptions-panel {
  padding: var(--space-4) var(--space-5);
}

.assumptions-panel summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-text);
}

.assumptions-panel ul {
  margin: var(--space-3) 0 0;
  padding-left: 1.15rem;
}

.purchase-tax-controls {
  display: grid;
  gap: var(--space-3);
}

.purchase-tax-controls p {
  margin: 0;
}

.purchase-tax-row {
  align-items: end;
}

.purchase-tax-row label {
  flex: 1 1 220px;
}

.purchase-tax-row .display-btn {
  align-self: end;
}

.purchase-tax-status {
  font-size: 0.9rem;
}

/* --------------------------------
   FORM CONTROLS
-------------------------------- */
label {
  display: grid;
  gap: var(--space-2);
  font-size: 0.92rem;
  font-weight: 700;
}

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

input[type="number"],
input[type="text"],
input[type="email"],
input[type="search"],
textarea,
select {
  width: 100%;
  min-height: 42px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

textarea {
  resize: vertical;
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible,
button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 18%, transparent);
}

.primary-btn {
  min-height: 44px;
  margin-top: var(--space-5);
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: background-color var(--transition-med), transform var(--transition-fast), box-shadow var(--transition-med);
}

.primary-btn:hover,
.primary-btn:focus-visible {
  background: color-mix(in srgb, var(--color-accent) 88%, #000000 12%);
  box-shadow: 0 10px 22px rgba(58, 134, 255, 0.25);
  transform: translateY(-1px);
}

/* --------------------------------
   PLANNER
-------------------------------- */
.planner h2:first-of-type {
  margin-top: 0;
}

.planner-intro {
  margin-bottom: var(--space-4);
}

.planner-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-4);
}

.planner-grid > label {
  grid-column: span 3;
}

.planner-grid-qty > label {
  grid-column: span 4;
}

.planner-grid-project > label {
  grid-column: span 4;
}

.door-total-label {
  margin: var(--space-4) 0 var(--space-2);
  color: var(--color-text-muted);
  font-weight: 700;
}

#door-rows {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.door-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  overflow: hidden;
}

.door-card summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: color-mix(in srgb, var(--color-bg) 92%, #f4f8fc 8%);
  color: var(--color-text);
  font-weight: 800;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.door-card summary::-webkit-details-marker {
  display: none;
}

.door-card summary:hover {
  background: color-mix(in srgb, var(--color-bg) 86%, #f4f8fc 14%);
}

.door-summary-values {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--color-text-soft);
  text-align: right;
}

.door-row {
  border-top: 1px solid var(--color-border);
  padding: var(--space-5);
  margin: 0;
}

/* --------------------------------
   GROUP CARDS / COLLAPSIBLE
-------------------------------- */
.groups-grid,
#content {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-5);
}

.groups-grid > *,
#content > * {
  grid-column: span 12;
}

.group-card {
  padding: clamp(24px, 3vw, 40px);
  overflow: visible;
}

.group-card h2,
.group-card p {
  margin: 0;
}

.collapsible-card {
  padding: 0;
  overflow: hidden;
}

.collapsible-card summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.collapsible-card summary::-webkit-details-marker {
  display: none;
}

.collapsible-card summary::after {
  content: "+";
  color: var(--color-text-soft);
  font-size: 1.25rem;
  line-height: 1;
}

.collapsible-card[open] summary::after {
  content: "-";
}

.collapsible-card[open] summary {
  border-bottom-color: var(--color-border);
}

.collapsible-card summary:hover {
  background: color-mix(in srgb, var(--color-accent) 6%, var(--color-bg));
}

.group-card-body {
  padding: 0 var(--space-5) var(--space-5);
  display: grid;
  gap: var(--space-3);
}

.group-card-body > p {
  margin: 0;
}

.print-meta {
  font-size: 0.84rem;
  color: var(--color-text-soft);
}

/* --------------------------------
   TABLES
-------------------------------- */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-bg);
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--color-text);
  font-weight: 800;
  background: color-mix(in srgb, var(--color-bg) 90%, #f2f5f9 10%);
}

tr:last-child td {
  border-bottom: 0;
}

/* --------------------------------
   CALLOUTS
.print-meta {
  display: none;
}

-------------------------------- */
.callout {
  margin: 0;
  padding: var(--space-4) var(--space-5);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  color: var(--color-text-soft);
  position: relative;
  overflow-wrap: anywhere;
}

.callout strong {
  color: var(--color-text);
}

.callout.tip {
  border-left-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 7%, var(--color-bg));
  padding-right: calc(var(--space-5) + 28px);
}

.callout.tip.is-dismissed {
  display: none;
}

.callout-dismiss {
  position: absolute;
  top: 50%;
  right: var(--space-3);
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--color-text-soft);
  font: inherit;
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.callout-dismiss:hover,
.callout-dismiss:focus-visible {
  color: var(--color-text);
  background: color-mix(in srgb, var(--color-accent) 14%, var(--color-bg));
  outline: none;
}

.callout.ready {
  border-left-color: var(--color-success);
  background: color-mix(in srgb, var(--color-success) 10%, var(--color-bg));
}

.callout.warning {
  border-left-color: var(--color-warning);
  background: color-mix(in srgb, var(--color-warning) 13%, var(--color-bg));
}

.callout.error {
  border-left-color: var(--color-error);
  background: color-mix(in srgb, var(--color-error) 10%, var(--color-bg));
}

.workflow-nav-meta {
  margin-bottom: var(--space-3);
}

.workflow-nav-meta p {
  margin: 0;
}

.workflow-nav-meta p + p {
  margin-top: var(--space-1);
}

.workflow-status-row {
  margin-top: var(--space-3);
  display: grid;
  gap: var(--space-2);
}

.workflow-status-row p {
  margin: 0;
}

.status-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.78rem;
  font-weight: 700;
}

.status-pill.is-complete {
  color: var(--color-success);
  background: rgba(46, 204, 113, 0.14);
  border: 1px solid rgba(46, 204, 113, 0.34);
}

.status-pill.is-pending {
  color: var(--color-text-soft);
  background: rgba(74, 74, 74, 0.08);
  border: 1px solid rgba(74, 74, 74, 0.2);
}

.field-error {
  display: block;
  margin-top: var(--space-1);
  color: var(--color-error);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.3;
}

input.is-invalid {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-error) 16%, transparent);
}

/* --------------------------------
   CHECKLIST
-------------------------------- */
.checklist {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.checklist li {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: var(--space-3);
  margin: 0;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.checklist li:hover {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 5%, var(--color-bg));
}

.checklist input[type="checkbox"] {
  margin-top: 2px;
  width: 18px;
  height: 18px;
  accent-color: var(--color-success);
}

.checklist label {
  margin: 0;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
}

/* --------------------------------
   LEGACY / MANUAL ELEMENTS
-------------------------------- */
.section-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-7) 0 var(--space-5);
}

.page-break {
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px dashed var(--color-border);
}

footer {
  text-align: right;
  font-size: 0.84rem;
  color: var(--color-text-soft);
  margin-top: var(--space-6);
}

.step {
  counter-increment: step;
  display: grid;
  grid-template-columns: 42px 170px 1fr;
  align-items: start;
  column-gap: var(--space-4);
  row-gap: var(--space-2);
  margin: var(--space-4) 0;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.step > * {
  min-width: 0;
}

.step::before {
  content: counter(step, decimal-leading-zero);
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-accent) 14%, var(--color-bg));
  color: var(--color-accent);
  font-size: 0.82rem;
  font-weight: 800;
}

.step p {
  grid-column: 3;
  margin: 0;
}

.step .icon {
  grid-column: 3;
  margin-top: 2px;
}

.step-visual {
  width: 100%;
  max-width: 170px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-bg) 90%, #f2f5f8 10%);
}

.icon {
  width: 22px;
  height: 22px;
  vertical-align: -4px;
  margin-right: 6px;
  color: var(--color-text-soft);
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon.large {
  width: 58px;
  height: 58px;
}

.legend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-3);
  margin: var(--space-3) 0 var(--space-5);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
}

.toc h2 {
  margin: 0;
}

.toc ul {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
}

.toc li {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-2) 0;
}

.cover {
  min-height: min(900px, calc(100vh - 96px));
  text-align: center;
  display: grid;
  place-items: center;
  gap: var(--space-6);
}

.cover-title-block {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: inline-block;
  padding: var(--space-4) var(--space-6);
  text-align: left;
}

.cover-title-block h1,
.cover-title-block p,
.cover-subline {
  margin: 0;
}

.door-five {
  width: 44px;
  height: 44px;
  color: var(--color-accent);
}

/* --------------------------------
   RESPONSIVE
-------------------------------- */
@media (max-width: 1080px) {
  .planner-grid > label {
    grid-column: span 6;
  }

  .top-nav a {
    grid-column: span 4;
  }
}

@media (max-width: 900px) {
  .top-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .top-nav a {
    grid-column: auto;
    justify-content: flex-start;
  }

  .planner-grid > label {
    grid-column: span 12;
  }

  .planner-grid-qty > label {
    grid-column: span 6;
  }

  .cover {
    min-height: 0;
    padding-block: var(--space-6);
  }
}

@media (max-width: 760px) {
  body {
    padding: var(--space-4);
    gap: var(--space-4);
    background: var(--color-bg);
  }

  .page-header,
  .planner,
  .group-card,
  .toc,
  .cover {
    padding: var(--space-4);
    box-shadow: none;
  }

  .group-card-body {
    padding: 0 var(--space-4) var(--space-4);
  }

  h2 {
    margin-top: var(--space-5);
  }

  .planner-grid > label,
  .planner-grid-qty > label {
    grid-column: 1 / -1;
  }

  .top-nav {
    grid-template-columns: 1fr;
  }

  .top-nav a {
    grid-column: auto;
    justify-content: flex-start;
    border-radius: var(--radius-sm);
  }

  .top-nav-desktop,
  #display-controls-host {
    display: none;
  }

  .menu-trigger-wrap {
    display: flex;
    justify-content: flex-start;
    margin-top: var(--space-2);
    position: sticky;
    top: max(var(--space-2), env(safe-area-inset-top));
    z-index: 30;
  }

  .menu-trigger-btn {
    min-width: 120px;
  }

  .mobile-drawer-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.34);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    z-index: 44;
  }

  .mobile-drawer {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: min(88vw, 360px);
    height: 100dvh;
    padding: var(--space-4);
    padding-bottom: calc(var(--space-4) + env(safe-area-inset-bottom, 0px));
    background: var(--color-bg);
    border-right: 1px solid var(--color-border);
    box-shadow: 12px 0 26px rgba(0, 0, 0, 0.18);
    overflow-y: auto;
    transform: translateX(-102%);
    transition: transform var(--transition-med);
    z-index: 45;
  }

  body.menu-open {
    overflow: hidden;
  }

  body.menu-open .mobile-drawer {
    transform: translateX(0);
  }

  body.menu-open .mobile-drawer-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-drawer .top-nav {
    display: grid;
    grid-template-columns: 1fr;
  }

  .mobile-drawer .top-nav a {
    justify-content: flex-start;
  }

  .menu-subaction-source {
    display: none !important;
  }

  .display-controls,
  .toolbar-row,
  #export-host,
  .collapsible-controls {
    width: 100%;
    gap: var(--space-3);
  }

  .display-controls .display-btn,
  .toolbar-row .display-btn,
  .collapsible-controls .display-btn {
    flex: 1 1 100%;
    justify-content: center;
  }

  .toolbar-row label,
  .toolbar-row select,
  .toolbar-row input,
  .toolbar-row textarea {
    width: 100%;
  }

  .door-card summary,
  .collapsible-card summary {
    padding: var(--space-3) var(--space-4);
  }

  .door-card summary {
    align-items: flex-start;
    flex-direction: column;
  }

  .door-summary-values {
    text-align: left;
    font-size: 0.82rem;
    line-height: 1.4;
  }

  .door-row {
    padding: var(--space-4);
  }

  .primary-btn {
    width: 100%;
    margin-top: var(--space-4);
  }

  .callout {
    border-left-width: 2px;
  }

  .step {
    grid-template-columns: 34px 1fr;
  }

  .step-visual {
    grid-column: 1 / -1;
    max-width: 100%;
  }

  .step p,
  .step .icon {
    grid-column: 2;
  }

  table {
    display: block;
    overflow-x: auto;
    white-space: normal;
  }

  th,
  td {
    padding: 10px 12px;
  }
}

@media (max-width: 520px) {
  body {
    padding: var(--space-3);
  }

  .page-header,
  .planner,
  .group-card,
  .toc,
  .cover,
  .assumptions-panel,
  .callout {
    padding: var(--space-3);
  }

  h1 {
    font-size: 1.65rem;
  }

  h2 {
    font-size: 1.1rem;
  }

  .page-header p,
  .planner-intro {
    font-size: 0.94rem;
  }

  .display-btn,
  .primary-btn,
  .top-nav a {
    min-height: 46px;
  }

  .door-five {
    display: none;
  }

  .step {
    grid-template-columns: 1fr;
    row-gap: var(--space-3);
  }

  .step::before {
    width: 28px;
    height: 28px;
  }

  .step p,
  .step .icon,
  .step-visual {
    grid-column: 1;
  }

  .collapsible-card summary,
  .door-card summary {
    gap: var(--space-2);
  }
}

/* --------------------------------
   PRINT
-------------------------------- */
@media print {
  body {
    padding: 0;
    background: #ffffff;
    color: #111111;
    display: block;
  }

  body > * {
    margin: 0;
  }

  .top-nav,
  .menu-trigger-wrap,
  .mobile-drawer,
  .mobile-drawer-backdrop,
  .display-controls,
  .collapsible-controls,
  #export-host,
  .toolbar-row,
  [data-project-action],
  [data-copy-group],
  [data-duplicate-checklist],
  .primary-btn,
  .callout.tip,
  .assumptions-panel {
    display: none;
  }

  .page-header,
  .planner,
  .group-card,
  .callout,
  .toc,
  .cover,
  .assumptions-panel,
  table {
    box-shadow: none;
    border-color: #d8d8d8;
    background: #ffffff;
  }

  .group-card {
    page-break-inside: avoid;
    break-inside: avoid;
  }

  .page-break {
    page-break-before: always;
    margin: 0;
    padding: 0;
    border: 0;
  }

  .print-meta {
    display: block;
    color: #111111;
  }

  .collapsible-card + .collapsible-card {
    page-break-before: always;
    break-before: page;
  }

  .print-section-break {
    page-break-before: always;
    break-before: page;
    margin-top: 0;
  }

  .checklist li,
  tr {
    page-break-inside: avoid;
    break-inside: avoid;
  }

}