/* ============================================================
   HINSON11 — Aerospace Design System
   Premium dark theme · CSS variables · responsive · accessible
   ============================================================ */

:root {
  /* Core palette — monochrome black / white (SpaceX-inspired) */
  --bg-deep: #000000;
  --bg-surface: #0A0A0A;
  --bg-elevated: #111111;
  --bg-card: #0D0D0D;
  --bg-card-hover: #161616;

  --text-primary: #FFFFFF;
  --text-secondary: #B0B0B0;
  --text-muted: #6E6E6E;
  --text-inverse: #000000;

  --accent: #FFFFFF;
  --accent-dim: #C8C8C8;
  --accent-soft: rgba(255, 255, 255, 0.08);
  --accent-border: rgba(255, 255, 255, 0.22);

  --steel: #8A8A8A;
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.18);
  --border-focus: #FFFFFF;

  --success: #A0A0A0;
  --warning: #C8C8C8;
  --danger: #E0E0E0;

  /* Typography */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", ui-monospace, Menlo, Consolas, monospace;

  /* Spacing & layout */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 6rem;
  --space-16: 8rem;

  --container: 1200px;
  --container-wide: 1400px;
  --header-h: 72px;

  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.45);

  --transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 320ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  :root {
    --transition: 0ms;
    --transition-slow: 0ms;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Reset & base */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}
a:hover {
  opacity: 0.75;
}
a:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 3px;
}

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

ul, ol {
  list-style: none;
}

/* Typography scale */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4.25rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }

.lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 42rem;
  line-height: 1.7;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.875em;
  letter-spacing: 0.02em;
}

.label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* Layout utilities */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.container-wide {
  max-width: var(--container-wide);
}

.section {
  padding-block: var(--space-12);
}

.section-sm {
  padding-block: var(--space-8);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Header / Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(7, 9, 12, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0;
  color: var(--text-primary);
  text-decoration: none;
}

.logo:hover {
  color: var(--text-primary);
}

.logo-text {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

.nav-link {
  padding: var(--space-2) var(--space-3);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  opacity: 1;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--accent-soft);
  opacity: 1;
}

.nav-link.active {
  color: var(--text-primary);
  background: var(--accent-soft);
  opacity: 1;
}

.nav-cta {
  margin-left: var(--space-3);
  padding: var(--space-2) var(--space-4);
  background: var(--text-primary);
  color: var(--text-inverse);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.nav-cta:hover {
  background: #E5E5E5;
  color: var(--text-inverse);
}

.nav-cta:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Mobile menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-mobile {
  display: none;
  position: absolute;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: var(--space-4);
  flex-direction: column;
  gap: var(--space-1);
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile .nav-link {
  padding: var(--space-3) var(--space-4);
  font-size: 1rem;
}

.nav-mobile .nav-cta {
  margin: var(--space-3) 0 0;
  text-align: center;
}

@media (max-width: 900px) {
  .nav-desktop { display: none; }
  .menu-toggle { display: flex; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
  text-decoration: none;
}

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

.btn-primary {
  background: var(--text-primary);
  color: var(--text-inverse);
}
.btn-primary:hover {
  background: #E5E5E5;
  color: var(--text-inverse);
}

.btn-secondary {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text-primary);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-ghost:hover {
  color: var(--accent);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.35) 0%, rgba(0, 0, 0, 0.82) 65%, var(--bg-deep) 100%),
    linear-gradient(90deg, rgba(0, 0, 0, 0.75) 0%, transparent 55%),
    url("https://images.unsplash.com/photo-1516849841032-87cbac4d88f7?auto=format&fit=crop&w=1920&q=80") center/cover no-repeat;
  z-index: 0;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 40%, rgba(255, 255, 255, 0.04) 0%, transparent 55%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  padding-block: var(--space-12);
}

.hero h1 {
  margin-bottom: var(--space-5);
}

.hero .lead {
  margin-bottom: var(--space-6);
  font-size: 1.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.hero-meta {
  margin-top: var(--space-8);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--text-primary);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.card-img {
  aspect-ratio: 16 / 10;
  background: var(--bg-elevated);
  object-fit: cover;
  width: 100%;
}

.card-body {
  padding: var(--space-5);
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.card-title {
  font-size: 1.125rem;
  margin-bottom: var(--space-2);
}

.card-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--space-4);
}

/* Status badges */
.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  border: 1px solid;
}

.badge-concept { color: var(--text-muted); border-color: var(--text-muted); }
.badge-dev { color: var(--text-primary); border-color: var(--border-strong); }
.badge-review { color: var(--text-secondary); border-color: var(--text-secondary); }
.badge-sim { color: var(--text-primary); border-color: var(--border-strong); }
.badge-validated { color: var(--text-primary); border-color: var(--text-primary); }

/* Section headers */
.section-header {
  margin-bottom: var(--space-8);
  max-width: 640px;
}

.section-header .label {
  margin-bottom: var(--space-3);
  display: block;
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

/* Services / capability cards */
.capability-card {
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  height: 100%;
  transition: border-color var(--transition);
}

.capability-card:hover {
  border-color: var(--accent-border);
}

.capability-icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-4);
  color: var(--accent);
}

.capability-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-2);
}

.capability-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* How we work steps */
.steps {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
  counter-reset: step;
}

.step {
  position: relative;
  padding: var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: var(--space-3);
  letter-spacing: 0.05em;
}

.step h4 {
  font-size: 0.9375rem;
  margin-bottom: var(--space-2);
}

.step p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 480px) {
  .steps {
    grid-template-columns: 1fr;
  }
}

/* Filters & search */
.filters-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  align-items: center;
}

.search-input {
  flex: 1;
  min-width: 200px;
  max-width: 360px;
  padding: 0.65rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  transition: border-color var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.filter-btn {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.filter-btn:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* Engine / vehicle library cards */
.library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-5);
}

.library-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  min-height: 200px;
}

.library-card:hover,
.library-card:focus-visible {
  border-color: var(--text-primary);
  background: var(--bg-card-hover);
  outline: none;
  transform: translateY(-2px);
}

.library-card h3 {
  font-size: 1.0625rem;
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.library-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.library-card .card-meta {
  margin-top: var(--space-3);
}

.library-card .card-meta:first-child {
  margin-top: 0;
  margin-bottom: var(--space-3);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-6);
  position: relative;
  transform: translateY(12px);
  transition: transform var(--transition-slow);
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition), border-color var(--transition);
}

.modal-close:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.modal h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-3);
  padding-right: 2.5rem;
}

.modal .modal-body {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.modal .modal-body h4 {
  color: var(--text-primary);
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
  font-size: 0.9375rem;
}

.modal .modal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Forms */
.form-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
}

.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
}

.form-group label .req {
  color: var(--accent);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-group .hint {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

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

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.checkbox-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--accent);
  flex-shrink: 0;
}

.form-error {
  color: var(--danger);
  font-size: 0.8125rem;
  margin-top: var(--space-1);
  display: none;
}

.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
  border-color: var(--danger);
}

.form-group.has-error .form-error {
  display: block;
}

.form-success {
  display: none;
  padding: var(--space-5);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--text-primary);
  margin-top: var(--space-5);
}

.form-success.visible {
  display: block;
}

.form-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: var(--space-4);
  padding: var(--space-3);
  background: var(--bg-elevated);
  border-radius: var(--radius);
  border-left: 3px solid var(--accent-dim);
}

/* Tabs for ELab */
.tabs {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tab-btn {
  padding: var(--space-3) var(--space-5);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition);
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* Comparison table */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-block: var(--space-6);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

th, td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--bg-elevated);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

td {
  color: var(--text-secondary);
}

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

tr:hover td {
  background: rgba(255, 255, 255, 0.03);
}

/* Glossary */
.glossary {
  display: grid;
  gap: var(--space-4);
}

.glossary-item {
  padding: var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.glossary-item dt {
  font-weight: 600;
  color: var(--accent);
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.glossary-item dd {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* Workflow steps (ELab) */
.workflow {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-block: var(--space-6);
}

.workflow-step {
  flex: 1;
  min-width: 120px;
  padding: var(--space-3);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.workflow-step strong {
  display: block;
  color: var(--text-primary);
  font-size: 0.8125rem;
  margin-bottom: 2px;
  font-family: var(--font-sans);
}

/* Status list */
.status-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.status-pill {
  padding: 0.25rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-10) var(--space-6);
  background: var(--bg-surface);
  margin-top: var(--space-12);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (max-width: 800px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: var(--space-3);
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--space-2);
  transition: color var(--transition), opacity var(--transition);
  opacity: 1;
}

.footer-col a:hover {
  color: var(--text-primary);
  opacity: 1;
}

.footer-bottom {
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.disclaimer {
  font-size: 0.75rem;
  color: var(--text-muted);
  max-width: 640px;
  line-height: 1.5;
}

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* Utility */
.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-center { text-align: center; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.divider {
  height: 1px;
  background: var(--border);
  margin-block: var(--space-8);
}

/* Placeholder note */
.placeholder-note {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  padding: var(--space-2) var(--space-3);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
}

/* Page hero (inner pages) */
.page-hero {
  padding-block: var(--space-12) var(--space-8);
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(ellipse at 20% 0%, rgba(255, 255, 255, 0.03) 0%, transparent 50%),
    var(--bg-deep);
}

.page-hero h1 {
  margin-bottom: var(--space-4);
}

/* References */
.refs {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.refs a {
  color: var(--accent-dim);
}

.refs li {
  margin-bottom: var(--space-2);
  padding-left: var(--space-3);
  border-left: 2px solid var(--border);
}