/* ============================================================
   MANIFEST — Shared Stylesheet
   Dodo Airlines Ground Operations — Offline Manifest System
   ============================================================ */

/* ============================================================
   1. DESIGN TOKENS
   ============================================================ */

:root {
  /* --- Brand: Dodo Blue --- */
  --color-navy:           oklch(0.600 0.160 215);
  --color-navy-hover:     oklch(0.540 0.155 215);
  --color-navy-muted:     oklch(0.680 0.135 215);
  --color-navy-tint:      oklch(0.950 0.032 215);
  --color-navy-tint-md:   oklch(0.905 0.058 215);

  /* --- Brand: Dodo Yellow --- */
  --color-gold:           oklch(0.830 0.175 90);
  --color-gold-dark:      oklch(0.700 0.160 88);
  --color-gold-tint:      oklch(0.968 0.050 90);

  /* --- Backgrounds --- */
  --color-bg:             oklch(1.000 0.000 0);
  --color-surface:        oklch(0.975 0.004 252);
  --color-surface-subtle: oklch(0.955 0.007 252);

  /* --- Text --- */
  --color-ink:            oklch(0.155 0.012 252);
  --color-ink-muted:      oklch(0.460 0.010 252);
  --color-ink-disabled:   oklch(0.650 0.007 252);

  /* --- Borders --- */
  --color-border:         oklch(0.900 0.008 252);
  --color-border-strong:  oklch(0.820 0.015 252);
  --color-border-focus:   oklch(0.280 0.090 252);

  /* --- Semantic: Success / Add --- */
  --color-success:        oklch(0.360 0.095 152);
  --color-success-light:  oklch(0.950 0.040 152);
  --color-success-border: oklch(0.820 0.055 152);

  /* --- Semantic: Warning / Change --- */
  --color-warning:        oklch(0.520 0.110 72);
  --color-warning-light:  oklch(0.960 0.045 72);
  --color-warning-border: oklch(0.830 0.075 72);

  /* --- Semantic: Danger / Remove --- */
  --color-danger:         oklch(0.460 0.160 30);
  --color-danger-dark:    oklch(0.380 0.140 30);
  --color-danger-light:   oklch(0.960 0.040 30);
  --color-danger-border:  oklch(0.820 0.060 30);

  /* --- Semantic: Info --- */
  --color-info:           oklch(0.380 0.090 252);
  --color-info-light:     oklch(0.945 0.022 252);

  /* --- Seat States --- */
  --seat-available-bg:      oklch(1.000 0.000 0);
  --seat-available-border:  oklch(0.880 0.012 252);
  --seat-available-text:    oklch(0.460 0.010 252);

  --seat-occupied-bg:       oklch(0.945 0.022 252);
  --seat-occupied-border:   oklch(0.780 0.040 252);
  --seat-occupied-text:     oklch(0.280 0.090 252);

  --seat-selected-bg:       oklch(0.720 0.130 85);
  --seat-selected-border:   oklch(0.560 0.120 85);
  --seat-selected-text:     oklch(1.000 0.000 0);

  --seat-conflict-bg:       oklch(0.960 0.040 30);
  --seat-conflict-border:   oklch(0.460 0.160 30);
  --seat-conflict-text:     oklch(0.380 0.140 30);

  --seat-crew-bg:           oklch(0.940 0.028 290);
  --seat-crew-border:       oklch(0.700 0.070 290);
  --seat-crew-text:         oklch(0.320 0.090 290);

  /* --- Typography --- */
  --font-sans:    "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono:    "SF Mono", "Fira Code", "Consolas", monospace;

  --text-xs:      0.75rem;    /* 13.5px — keyboard hints only */
  --text-sm:      0.875rem;   /* 15.75px — labels, badges, metadata */
  --text-base:    1rem;       /* 18px — body floor */
  --text-md:      1.125rem;   /* 20.25px — titles */
  --text-lg:      1.375rem;   /* 24.75px — section headings */
  --text-xl:      1.75rem;    /* 31.5px — display */
  --text-2xl:     2.25rem;    /* 40.5px — document headings */

  /* --- Spacing --- */
  --space-1:   4px;
  --space-2:   8px;
  --space-3:   12px;
  --space-4:   16px;
  --space-5:   20px;
  --space-6:   24px;
  --space-8:   32px;
  --space-10:  40px;
  --space-12:  48px;
  --space-16:  64px;
  --space-20:  80px;

  /* --- Shape --- */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-full: 9999px;

  /* --- Elevation --- */
  --shadow-sm:      0 1px 3px oklch(0 0 0 / 0.08), 0 1px 2px oklch(0 0 0 / 0.06);
  --shadow-md:      0 4px 12px oklch(0 0 0 / 0.10), 0 2px 4px oklch(0 0 0 / 0.06);
  --shadow-lg:      0 8px 32px oklch(0 0 0 / 0.12), 0 4px 8px oklch(0 0 0 / 0.06);
  --shadow-overlay: 0 16px 48px oklch(0 0 0 / 0.18), 0 4px 16px oklch(0 0 0 / 0.10);

  /* --- Motion --- */
  --duration-fast:  120ms;
  --duration-base:  180ms;
  --duration-slow:  280ms;
  --ease-out:       cubic-bezier(0.2, 0, 0, 1);
  --ease-in-out:    cubic-bezier(0.4, 0, 0.2, 1);

  /* --- Z-Index --- */
  --z-dropdown:  100;
  --z-sticky:    200;
  --z-overlay:   300;
  --z-modal:     400;
  --z-toast:     500;
  --z-tooltip:   600;
}

/* ============================================================
   2. RESET & BASE
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Ensure [hidden] always wins over display:flex/grid declarations */
[hidden] { display: none !important; }

html {
  font-size: 18px; /* 1rem = 18px — the 18px floor */
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-ink);
  background-color: var(--color-surface-subtle);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

button {
  cursor: pointer;
}

a {
  color: var(--color-navy);
  text-decoration: underline;
}

a:hover {
  color: var(--color-navy-hover);
}

/* Focus visible — keyboard only */
:focus-visible {
  outline: 3px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* Suppress default focus for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* ============================================================
   3. LAYOUT PRIMITIVES
   ============================================================ */

/* App shell: full-height, stacked */
.app {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 100vh;
}

.app--with-footer {
  grid-template-rows: auto 1fr auto;
}

.app--with-nav {
  grid-template-rows: auto auto 1fr;
}

.app--with-nav-footer {
  grid-template-rows: auto auto 1fr auto;
}

/* Centered content column */
.content-column {
  max-width: 720px;
  margin-inline: auto;
  width: 100%;
  padding-inline: var(--space-6);
}

.content-column--wide {
  max-width: 900px;
}

.content-column--narrow {
  max-width: 560px;
}

/* ============================================================
   4. HEADER
   ============================================================ */

.app-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--space-8);
  height: 60px;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.app-header__wordmark {
  font-size: var(--text-md);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-navy);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.app-header__wordmark::before {
  content: "🦤";
  display: block;
  font-size: 20px;
  line-height: 1;
  flex-shrink: 0;
}

.app-header__title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
}

.app-header__flight {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  font-weight: 500;
}

.app-header__spacer {
  flex: 1;
}

.app-header__back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-muted);
  background: none;
  border: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  min-height: 44px;
  transition: color var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
}

.app-header__back:hover {
  color: var(--color-ink);
  background: var(--color-surface-subtle);
}

.app-header__back:focus-visible {
  outline: 3px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* ============================================================
   5. OFFLINE BADGE
   ============================================================ */

.offline-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-navy);
  background: var(--color-navy-tint);
  border: 1px solid oklch(0.870 0.030 252);
  padding: 3px var(--space-2);
  border-radius: var(--radius-full);
}

.offline-badge::before {
  content: "●";
  font-size: 0.5em;
  color: var(--color-success);
}

/* ============================================================
   6. NAVIGATION TABS
   ============================================================ */

.nav-tabs {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  padding-inline: var(--space-8);
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-tabs::-webkit-scrollbar {
  display: none;
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 48px;
  padding: 0 var(--space-5);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
  text-decoration: none;
}

.nav-tab:hover {
  color: var(--color-ink);
}

.nav-tab[aria-current="page"],
.nav-tab.is-active {
  color: var(--color-navy);
  border-bottom-color: var(--color-navy);
  font-weight: 600;
}

.nav-tab:focus-visible {
  outline: 3px solid var(--color-border-focus);
  outline-offset: -3px;
}

.nav-tab__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  background: var(--color-surface-subtle);
  color: var(--color-ink-muted);
}

.nav-tab.is-active .nav-tab__badge {
  background: var(--color-navy-tint);
  color: var(--color-navy);
}

/* ============================================================
   7. BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Primary */
.btn--primary {
  background: var(--color-navy);
  color: #fff;
}

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

.btn--primary:focus-visible {
  outline: 3px solid var(--color-navy);
  outline-offset: 3px;
}

/* Secondary */
.btn--secondary {
  background: transparent;
  color: var(--color-navy);
  border: 1.5px solid var(--color-navy);
}

.btn--secondary:hover {
  background: var(--color-navy-tint);
}

.btn--secondary:focus-visible {
  outline: 3px solid var(--color-navy);
  outline-offset: 3px;
}

/* Ghost */
.btn--ghost {
  background: transparent;
  color: var(--color-ink-muted);
  border: 1px solid var(--color-border);
}

.btn--ghost:hover {
  color: var(--color-ink);
  border-color: var(--color-border-strong);
  background: var(--color-surface-subtle);
}

.btn--ghost:focus-visible {
  outline: 3px solid var(--color-border-focus);
  outline-offset: 3px;
}

/* Danger */
.btn--danger {
  background: var(--color-danger);
  color: #fff;
}

.btn--danger:hover {
  background: var(--color-danger-dark);
}

.btn--danger:focus-visible {
  outline: 3px solid var(--color-danger);
  outline-offset: 3px;
}

/* Size modifier: compact */
.btn--sm {
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

/* Width modifier: full */
.btn--full {
  width: 100%;
}

/* Icon-only (still needs aria-label) */
.btn--icon {
  min-height: 44px;
  min-width: 44px;
  padding: 0;
}

/* ============================================================
   8. FORM CONTROLS
   ============================================================ */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-muted);
  display: block;
}

.form-label--required::after {
  content: " *";
  color: var(--color-danger);
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-ink);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  -webkit-appearance: none;
  appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-ink-disabled);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-navy);
  box-shadow: 0 0 0 3px var(--color-navy-tint);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background: var(--color-surface-subtle);
  color: var(--color-ink-disabled);
  cursor: not-allowed;
}

.form-input.is-error,
.form-select.is-error,
.form-textarea.is-error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px var(--color-danger-light);
}

.form-hint {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.form-error {
  font-size: var(--text-sm);
  color: var(--color-danger);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

/* Select arrow */
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23666' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}

/* Checkbox */
.form-checkbox {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink);
  cursor: pointer;
  user-select: none;
}

.form-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-navy);
  cursor: pointer;
  flex-shrink: 0;
}

/* Form grid layouts */
.form-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.form-row--2 {
  grid-template-columns: repeat(2, 1fr);
}

.form-row--4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 640px) {
  .form-row,
  .form-row--2,
  .form-row--4 {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   9. CARDS & SECTIONS
   ============================================================ */

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.card--subtle {
  background: var(--color-surface);
  border-color: var(--color-border);
}

/* Section header */
.section-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
}

.section-count {
  font-size: var(--text-sm);
  color: var(--color-ink-disabled);
}

/* ============================================================
   10. STATUS BADGES
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  white-space: nowrap;
}

.badge--draft {
  background: var(--color-navy-tint);
  color: var(--color-navy);
}

.badge--complete {
  background: var(--color-success-light);
  color: var(--color-success);
}

.badge--add {
  background: var(--color-success-light);
  color: var(--color-success);
}

.badge--change {
  background: var(--color-warning-light);
  color: var(--color-warning);
}

.badge--remove {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.badge--conflict {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.badge--create {
  background: var(--color-navy-tint);
  color: var(--color-navy);
}

.badge--crew {
  background: var(--seat-crew-bg);
  color: var(--seat-crew-text);
}

/* ============================================================
   11. AIRCRAFT CARDS
   ============================================================ */

.aircraft-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

@media (max-width: 700px) {
  .aircraft-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .aircraft-grid {
    grid-template-columns: 1fr;
  }
}

.aircraft-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-height: 130px;
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: left;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: border-color var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.aircraft-card:hover {
  border-color: var(--color-navy);
  box-shadow: var(--shadow-sm);
}

.aircraft-card:focus-visible {
  outline: 3px solid var(--color-navy);
  outline-offset: 2px;
}

.aircraft-card[aria-pressed="true"],
.aircraft-card.is-selected {
  background: var(--color-navy-tint);
  border-color: var(--color-navy);
  border-width: 2px;
  box-shadow: 0 0 0 1px var(--color-navy);
}

.aircraft-card__star {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: none;
  border: none;
  border-radius: 50%;
  color: var(--color-border-strong);
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
  padding: 0;
}

.aircraft-card__star:hover {
  color: var(--color-gold);
  background: var(--color-gold-tint);
}

.aircraft-card__star.is-active {
  color: var(--color-gold);
}

.aircraft-card__star:focus-visible {
  outline: 3px solid var(--color-navy);
  outline-offset: 2px;
}

.aircraft-card__selected-label {
  display: none;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-navy);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-1);
}

.aircraft-card.is-selected .aircraft-card__selected-label {
  display: block;
}

.aircraft-card__model {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: -0.01em;
}

.aircraft-card__manufacturer {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  font-weight: 500;
}

.aircraft-card__seats {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.aircraft-card__config {
  margin-top: auto;
  align-self: flex-start;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-navy);
  background: var(--color-navy-tint);
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
}

.aircraft-card.is-selected .aircraft-card__config {
  background: var(--color-bg);
}

/* ============================================================
   12. SEAT MAP
   ============================================================ */

.seat-map {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  background: var(--color-surface-subtle);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.seat-map__cabin-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-2) 0 var(--space-1);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-1);
}

.seat-row {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.seat-row__number {
  width: 32px;
  flex-shrink: 0;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-muted);
  text-align: center;
  font-family: var(--font-mono);
}

.seat-row__group {
  display: flex;
  gap: var(--space-1);
}

.seat-row__aisle {
  width: var(--space-6);
  flex-shrink: 0;
}

/* Column header row */
.seat-map__col-headers {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-1);
}

.seat-map__col-label {
  width: 48px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.seat-map__row-offset {
  width: 32px;
  flex-shrink: 0;
}

/* Seat cell */
.seat {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 600;
  font-family: var(--font-mono);
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  position: relative;
  background: var(--seat-available-bg);
  color: var(--seat-available-text);
  border-color: var(--seat-available-border);
}

.seat:focus-visible {
  outline: 3px solid var(--color-navy);
  outline-offset: 2px;
  z-index: 1;
}

.seat:hover:not(.seat--blocked):not(.seat--occupied):not(.seat--crew) {
  border-color: var(--color-navy);
  background: var(--color-navy-tint);
  color: var(--color-navy);
}

/* Seat states */
.seat--available {
  background: var(--seat-available-bg);
  color: var(--seat-available-text);
  border-color: var(--seat-available-border);
}

.seat--occupied {
  background: var(--seat-occupied-bg);
  color: var(--seat-occupied-text);
  border-color: var(--seat-occupied-border);
  cursor: default;
}

.seat--selected {
  background: var(--seat-selected-bg);
  color: var(--seat-selected-text);
  border-color: var(--seat-selected-border);
  box-shadow: 0 0 0 2px var(--seat-selected-bg);
}

.seat--conflict {
  background: var(--seat-conflict-bg);
  color: var(--seat-conflict-text);
  border-color: var(--seat-conflict-border);
  animation: seat-pulse 1.5s ease-in-out infinite;
}

.seat__conflict-flag {
  position: absolute;
  top: 2px;
  right: 3px;
  font-size: 10px;
  line-height: 1;
  color: var(--seat-conflict-text);
  font-family: var(--font-sans);
  pointer-events: none;
}

.seat--crew {
  background: var(--seat-crew-bg);
  color: var(--seat-crew-text);
  border-color: var(--seat-crew-border);
  cursor: default;
}

.seat--blocked {
  background: transparent;
  border: none;
  cursor: default;
  pointer-events: none;
}

/* Seat conflict pulse */
@keyframes seat-pulse {
  0%, 100% { box-shadow: 0 0 0 0 oklch(0.460 0.160 30 / 0.4); }
  50%       { box-shadow: 0 0 0 4px oklch(0.460 0.160 30 / 0); }
}

@media (prefers-reduced-motion: reduce) {
  .seat--conflict {
    animation: none;
    box-shadow: 0 0 0 2px var(--seat-conflict-border);
  }
}

/* Seat tooltip (passenger name on hover) */
.seat__tooltip {
  position: absolute;
  bottom: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-ink);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 500;
  font-family: var(--font-sans);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  z-index: var(--z-tooltip);
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.seat:hover .seat__tooltip,
.seat:focus-visible .seat__tooltip {
  opacity: 1;
}

/* Seat map legend */
.seat-map__legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-4) 0;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.legend-item__swatch {
  width: 18px;
  height: 18px;
  border-radius: var(--radius-sm);
  border: 1.5px solid;
  flex-shrink: 0;
}

.legend-item__swatch--available {
  background: var(--seat-available-bg);
  border-color: var(--seat-available-border);
}

.legend-item__swatch--occupied {
  background: var(--seat-occupied-bg);
  border-color: var(--seat-occupied-border);
}

.legend-item__swatch--selected {
  background: var(--seat-selected-bg);
  border-color: var(--seat-selected-border);
}

.legend-item__swatch--conflict {
  background: var(--seat-conflict-bg);
  border-color: var(--seat-conflict-border);
}

.legend-item__swatch--crew {
  background: var(--seat-crew-bg);
  border-color: var(--seat-crew-border);
}

/* ============================================================
   13. CHANGE LEDGER TIMELINE
   ============================================================ */

.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
  z-index: 0;
}

.timeline-group {
  margin-bottom: var(--space-6);
}

.timeline-group__date {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
  padding: var(--space-2) 0 var(--space-3) var(--space-8);
}

.timeline-entry {
  display: grid;
  grid-template-columns: 12px 1fr;
  gap: var(--space-4);
  padding: var(--space-2) 0;
  padding-left: 0;
  position: relative;
}

.timeline-entry__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-top: 5px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  border: 2px solid var(--color-bg);
}

.timeline-entry__dot--add    { background: var(--color-success); }
.timeline-entry__dot--change { background: var(--color-warning); }
.timeline-entry__dot--remove { background: var(--color-danger); }
.timeline-entry__dot--create { background: var(--color-navy); }
.timeline-entry__dot--clear  { background: var(--color-danger); }

.timeline-entry__card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  transition: background-color var(--duration-fast) var(--ease-out);
}

.timeline-entry__card:hover {
  background: var(--color-surface-subtle);
}

.timeline-entry__card.is-undone {
  opacity: 0.45;
}

.timeline-entry__card.is-undone .timeline-entry__description {
  text-decoration: line-through;
  text-decoration-color: var(--color-ink-muted);
}

.timeline-entry__header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-1);
}

.timeline-entry__action {
  font-size: var(--text-sm);
  font-weight: 600;
}

.timeline-entry__action--add    { color: var(--color-success); }
.timeline-entry__action--change { color: var(--color-warning); }
.timeline-entry__action--remove { color: var(--color-danger); }
.timeline-entry__action--create { color: var(--color-navy); }
.timeline-entry__action--clear  { color: var(--color-danger); }

.timeline-entry__time {
  margin-left: auto;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.timeline-entry__description {
  font-size: var(--text-sm);
  color: var(--color-ink);
  line-height: 1.5;
}

.timeline-entry__detail {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  margin-top: var(--space-1);
}

.timeline-entry__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-2);
}

/* ============================================================
   14. MANIFEST DOCUMENT (print view)
   ============================================================ */

.manifest-doc {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  max-width: 800px;
  width: 100%;
  padding: var(--space-12);
}

.manifest-doc__header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-6);
  padding-bottom: var(--space-6);
  margin-bottom: var(--space-8);
  border-bottom: 2px solid var(--color-ink);
}

.manifest-doc__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  text-transform: uppercase;
}

.manifest-doc__subtitle {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  margin-top: var(--space-1);
}

.manifest-doc__stamp {
  text-align: right;
}

.manifest-doc__stamp-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.manifest-doc__stamp-value {
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--color-ink);
}

.manifest-doc__flight-info {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-6);
  margin-bottom: var(--space-8);
}

.manifest-doc__field {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.manifest-doc__field-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  font-weight: 500;
}

.manifest-doc__field-value {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
}

.manifest-doc__summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-6);
  margin-bottom: var(--space-8);
}

.manifest-doc__stat {
  text-align: center;
}

.manifest-doc__stat-number {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-navy);
}

.manifest-doc__stat-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.manifest-doc__section-heading {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-8);
}

.data-table th {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1.5px solid var(--color-border-strong);
}

.data-table td {
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-ink);
  vertical-align: top;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table .col-seat,
.data-table .col-position {
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  width: 60px;
}

.data-table .col-doc,
.data-table .col-staffid {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.data-table .col-type {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.manifest-doc__footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding-top: var(--space-6);
  margin-top: var(--space-8);
  border-top: 2px solid var(--color-ink);
}

.manifest-doc__footer-text {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  line-height: 1.5;
}

.manifest-doc__sig {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  text-align: center;
  min-width: 200px;
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-ink);
}

/* ============================================================
   15. MODALS & DIALOGS
   ============================================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: oklch(0 0 0 / 0.50);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  z-index: var(--z-overlay);
  animation: overlay-in var(--duration-slow) var(--ease-out) both;
}

.modal-overlay.is-closing {
  animation: overlay-out var(--duration-base) var(--ease-in-out) both;
}

@keyframes overlay-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes overlay-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}

.modal {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-overlay);
  padding: var(--space-8);
  max-width: 440px;
  width: 100%;
  max-height: calc(100dvh - var(--space-12));
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  position: relative;
  z-index: var(--z-modal);
  animation: modal-in var(--duration-slow) var(--ease-out) both;
}

.modal-overlay.is-closing .modal {
  animation: modal-out var(--duration-base) var(--ease-in-out) both;
}

@keyframes modal-in {
  from { opacity: 0; transform: translateY(8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes modal-out {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(4px) scale(0.99); }
}

@media (prefers-reduced-motion: reduce) {
  .modal-overlay, .modal {
    animation: none;
  }
}

.modal__icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.modal__icon--danger {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.modal__icon--info {
  background: var(--color-navy-tint);
  color: var(--color-navy);
}

.modal__icon--warning {
  background: var(--color-warning-light);
  color: var(--color-warning);
}

.modal__title {
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  line-height: 1.3;
}

.modal__description {
  font-size: var(--text-base);
  color: var(--color-ink-muted);
  line-height: 1.6;
}

.modal__detail-block {
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
}

.modal__detail-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-4);
  padding: var(--space-1) 0;
  font-size: var(--text-sm);
}

.modal__detail-row + .modal__detail-row {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-1);
  padding-top: var(--space-2);
}

.modal__detail-label {
  color: var(--color-ink-muted);
  flex-shrink: 0;
}

.modal__detail-value {
  font-weight: 600;
  color: var(--color-ink);
  text-align: right;
}

.modal__warning-block {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  background: var(--color-danger-light);
  border: 1px solid var(--color-danger-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-danger-dark);
  line-height: 1.5;
}

.modal__warning-icon {
  font-size: var(--text-base);
  flex-shrink: 0;
  margin-top: 1px;
}

.modal__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.modal__kbd-hint {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

kbd {
  display: inline-block;
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border-strong);
  border-radius: 3px;
  padding: 1px 5px;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
}

/* ============================================================
   16. FOOTER / ACTION BAR
   ============================================================ */

.app-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 64px;
  position: sticky;
  bottom: 0;
  z-index: var(--z-sticky);
}

.app-footer__hint {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  margin-right: auto;
}

.app-footer__actions {
  display: flex;
  gap: var(--space-2);
}

.app-footer__status {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* ============================================================
   17. MAIN CONTENT AREAS
   ============================================================ */

.page-main {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  max-width: 760px;
  margin-inline: auto;
  width: 100%;
}

.page-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.page-title {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  line-height: 1.2;
}

.page-subtitle {
  font-size: var(--text-base);
  color: var(--color-ink-muted);
}

/* Hero card on home */
.hero-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-12) var(--space-8);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-5);
}

.hero-card__eyebrow {
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-navy);
  background: var(--color-navy-tint);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.hero-card__title {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  line-height: 1.2;
}

.hero-card__subtitle {
  font-size: var(--text-base);
  color: var(--color-ink-muted);
  max-width: 38ch;
  line-height: 1.6;
}

/* ============================================================
   18. RECENT MANIFESTS LIST
   ============================================================ */

.manifest-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.manifest-item {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  font-family: var(--font-sans);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}

.manifest-item:hover {
  border-color: var(--color-navy);
  box-shadow: var(--shadow-sm);
}

.manifest-item:focus-visible {
  outline: 3px solid var(--color-navy);
  outline-offset: 2px;
}

.manifest-item__flight {
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--color-ink);
  font-family: var(--font-mono);
}

.manifest-item__route {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.manifest-item__date {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  white-space: nowrap;
}

/* ============================================================
   19. SELECTION SUMMARY BANNER
   ============================================================ */

.selection-banner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--color-success-light);
  border: 1px solid var(--color-success-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-success);
}

.selection-banner__icon {
  font-size: var(--text-base);
  flex-shrink: 0;
}

/* ============================================================
   20. CUSTOM AIRCRAFT SECTION
   ============================================================ */

.custom-aircraft-section {
  background: var(--color-bg);
  border: 1.5px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.custom-aircraft-section__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.custom-aircraft-section__title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
}

.custom-aircraft-section__hint {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* ============================================================
   21. EMPTY STATES
   ============================================================ */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-12) var(--space-8);
  gap: var(--space-3);
}

.empty-state__icon {
  font-size: 2.5rem;
  opacity: 0.3;
}

.empty-state__title {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--color-ink);
}

.empty-state__description {
  font-size: var(--text-base);
  color: var(--color-ink-muted);
  max-width: 38ch;
  line-height: 1.6;
}

/* ============================================================
   22. TOAST NOTIFICATIONS
   ============================================================ */

.toast-region {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--color-ink);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toast-in var(--duration-base) var(--ease-out) both;
  max-width: 360px;
}

.toast.is-exiting {
  animation: toast-out var(--duration-base) var(--ease-in-out) both;
}

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

@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(4px); }
}

@media (prefers-reduced-motion: reduce) {
  .toast, .toast.is-exiting {
    animation: none;
  }
}

.toast--success { background: var(--color-success); }
.toast--danger  { background: var(--color-danger); }
.toast--warning { background: var(--color-warning); }

.toast__action {
  background: none;
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 2px var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: background var(--duration-fast) var(--ease-out);
}

.toast__action:hover {
  background: rgba(255,255,255,0.15);
}

/* ============================================================
   23. PRINT STYLES
   ============================================================ */

@media print {
  body {
    background: white;
    color: black;
  }

  .app-header,
  .nav-tabs,
  .app-footer,
  .screen-chrome,
  .toast-region,
  .modal-overlay,
  [data-no-print] {
    display: none !important;
  }

  .manifest-doc {
    border: none;
    box-shadow: none;
    border-radius: 0;
    padding: 0;
    max-width: 100%;
  }

  .manifest-wrapper {
    padding: 0;
  }

  .data-table {
    page-break-inside: auto;
  }

  .data-table tr {
    page-break-inside: avoid;
    page-break-after: auto;
  }

  .data-table thead {
    display: table-header-group;
  }

  .appendix {
    page-break-before: always;
  }
}

/* ============================================================
   24. UTILITIES
   ============================================================ */

.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;
}

.text-muted {
  color: var(--color-ink-muted);
}

.font-mono {
  font-family: var(--font-mono);
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Horizontal divider */
.divider {
  height: 1px;
  background: var(--color-border);
  border: none;
  margin: 0;
}

/* Stack / Cluster layout utilities */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.stack--sm { gap: var(--space-2); }
.stack--lg { gap: var(--space-6); }
.stack--xl { gap: var(--space-8); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.cluster--sm { gap: var(--space-2); }
.cluster--lg { gap: var(--space-4); }

.spacer { flex: 1; }