:root {
  color-scheme: dark;

  --bg: #0a0a0a;
  --panel: #0e0e0e;
  --ink: #f4f4f4;
  --ink-muted: #9a9a9a;
  --border: rgba(255, 255, 255, 0.14);
  --border-strong: rgba(255, 255, 255, 0.32);
  --white: #ffffff;
  --black: #000000;
  --accent-jet: #00d4ff;
  --accent-turboprop: #00ff7f;
  --accent-tutorial: #ffaa00;
  --alert: #ff3b30;
  --warn: #ffaa00;

  --mono: ui-monospace, 'Roboto Mono', 'SFMono-Regular', Menlo, Consolas, monospace;
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

  --shadow: 6px 6px 0 rgba(255, 255, 255, 0.045), 0 24px 48px -28px rgba(0, 0, 0, 0.9);
  --shadow-hover: 9px 9px 0 rgba(255, 255, 255, 0.08), 0 30px 60px -28px rgba(0, 0, 0, 0.95);
}

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  background-color: var(--bg);
  background-image:
    radial-gradient(1100px 640px at 50% -12%, rgba(255, 255, 255, 0.05), transparent 62%),
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    radial-gradient(1400px 900px at 50% 100%, #000000, #0a0a0a 60%);
  background-size: auto, 44px 44px, 44px 44px, auto;
  position: relative;
}

/* Fine film-grain texture, layered above everything, clicks pass through */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a { color: inherit; }

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
  width: auto;
  height: auto;
  padding: 8px 12px;
  background: var(--white);
  color: var(--black);
  z-index: 2000;
  outline: 2px solid var(--accent-jet);
  outline-offset: 2px;
}



/* ---------- Masthead ---------- */

.masthead {
  background-color: rgba(10, 10, 10, 0.92);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='28'%3E%3Cpath d='M14 9v10M9 14h10' stroke='%23ffffff' stroke-opacity='0.18' stroke-width='1.5'/%3E%3C/svg%3E");
  border-bottom: 1px solid var(--border-strong);
  position: sticky;
  top: 0;
  z-index: 30;
}

.masthead__bar {
  max-width: 1240px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.06em;
  color: var(--white);
  text-decoration: none;
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  border: 1px solid var(--white);
  color: var(--white);
}

.brand__mark svg { width: 15px; height: 15px; }

/* ---------- Page shell ---------- */

.page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

/* Corner registration marks — a small "+" at each top corner of a panel,
   like production marks on a technical drawing */
.mark-corners {
  position: relative;
}
.mark-corners::before,
.mark-corners::after {
  content: '';
  position: absolute;
  top: -1px;
  width: 9px; height: 9px;
  background:
    linear-gradient(var(--border-strong), var(--border-strong)) center / 1px 100% no-repeat,
    linear-gradient(90deg, var(--border-strong), var(--border-strong)) center / 100% 1px no-repeat;
  pointer-events: none;
}
.mark-corners::before { left: -1px; }
.mark-corners::after { right: -1px; }

.titleblock {
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 30px 32px;
  margin-bottom: 22px;
  position: relative;
  overflow: hidden;
}

.titleblock__deco {
  position: absolute;
  top: -70px;
  right: -70px;
  width: 300px;
  height: 300px;
  color: var(--white);
  opacity: 0.06;
  fill: none;
  stroke: currentColor;
  stroke-width: 1;
  pointer-events: none;
}

.titleblock__row {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
}

.titleblock h1 {
  margin: 8px 0 0;
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
}

.titleblock .tag {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  display: inline-block;
}

.titleblock .subtitle {
  margin-top: 10px;
  color: var(--ink-muted);
  font-size: 14.5px;
  max-width: 46ch;
}

/* ---------- Ruler divider ---------- */

.section-label {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 30px 0 14px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink-muted);
  white-space: nowrap;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 8px;
  background-image: repeating-linear-gradient(90deg, var(--border-strong) 0 1px, transparent 1px 10px);
  background-position: bottom;
  background-size: 100% 100%;
  opacity: 0.7;
}

/* ---------- Disclaimer ---------- */

.disclaimer {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--white);
  padding: 14px 20px;
  margin-bottom: 4px;
  font-size: 12.5px;
  color: #c7c7c7;
  line-height: 1.65;
}

.disclaimer strong {
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.disclaimer--global {
  max-width: 1240px;
  margin: 22px auto 0;
}

/* ---------- First-visit disclaimer modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay[hidden] {
  display: none;
}

.modal-overlay__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(3px);
}

.disclaimer-modal {
  position: relative;
  background: var(--panel);
  border: 3px solid var(--alert);
  border-radius: 14px;
  box-shadow: var(--shadow-hover);
  width: 100%;
  max-width: 560px;
  padding: 30px 32px 28px;
  text-align: center;
}

.disclaimer-modal__siren {
  font-size: 26px;
  line-height: 1;
  color: var(--warn);
  margin-bottom: 8px;
}

.disclaimer-modal__label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--warn);
  margin-bottom: 6px;
}

.disclaimer-modal h2 {
  margin: 0 0 16px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
  border-bottom: 1px solid var(--border);
  padding-bottom: 14px;
}

.disclaimer-modal__body p {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.65;
  color: #c7c7c7;
}

.disclaimer-modal__body strong {
  color: var(--white);
}

.disclaimer-modal__signoff {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-muted);
  margin-top: 18px !important;
}

.disclaimer-modal__ack {
  margin-top: 8px;
  width: 100%;
  padding: 12px 16px;
  text-align: center;
}

.disclaimer-modal__decline {
  margin-top: 8px;
  width: 100%;
  text-align: center;
}

.btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
}

.blocked-screen {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  padding: 20px;
  font-family: var(--sans);
  color: var(--ink);
}

.blocked-screen__icon {
  font-size: 34px;
  color: var(--alert);
}

.blocked-screen h2 {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.01em;
  color: var(--white);
}

.blocked-screen p {
  margin: 0 0 10px;
  color: var(--ink-muted);
  font-size: 14px;
  max-width: 42ch;
}

.blocked-screen .btn {
  border-radius: 8px;
}

@media (max-width: 560px) {
  .disclaimer-modal {
    padding: 24px 20px 22px;
  }

  .disclaimer-modal h2 {
    font-size: 19px;
  }
}

@media (max-height: 720px) {
  .disclaimer-modal {
    padding: 18px 24px 16px;
  }

  .disclaimer-modal__siren {
    font-size: 20px;
    margin-bottom: 4px;
  }

  .disclaimer-modal h2 {
    font-size: 18px;
    margin-bottom: 10px;
    padding-bottom: 10px;
  }

  .disclaimer-modal__body p {
    font-size: 12.5px;
    line-height: 1.5;
    margin-bottom: 9px;
  }

  .disclaimer-modal__signoff {
    margin-top: 10px !important;
  }

  .disclaimer-modal__ack {
    margin-top: 2px;
    padding: 9px 16px;
  }
}

/* ---------- Buttons ---------- */

.btn {
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 9px 16px;
  border: 1px solid var(--white);
  border-radius: 8px;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  display: inline-block;
  text-transform: uppercase;
  transition: background-color 0.12s ease, color 0.12s ease, transform 0.12s ease;
}

.btn--primary {
  background: var(--white);
  color: var(--black);
}
.btn--primary:hover { background: #d8d8d8; transform: translateY(-1px); }

.btn--ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--ink-muted);
}
.btn--ghost:hover { border-color: var(--white); color: var(--white); transform: translateY(-1px); }

/* ---------- Site Nav (category pages) ---------- */

.site-nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}

.site-nav__link {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-decoration: none;
  padding: 7px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  white-space: nowrap;
  transition: background-color 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}

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

.site-nav__link:hover,
.site-nav__link:focus-visible {
  border-color: var(--white);
  color: var(--white);
}

.site-nav__link--active {
  background: var(--white);
  border-color: var(--white);
  color: var(--black);
  box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.45);
}

.site-nav__link--active:hover,
.site-nav__link--active:focus-visible {
  color: var(--black);
}

/* ---------- Empty State ---------- */

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--ink-muted);
}

.spec-badge.dev {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #bdbdbd;
}

/* ---------- Controls (search + sort) ---------- */

.controls-section {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin: 20px 0 16px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
}

.search-bar {
  position: relative;
  flex: 1;
  min-width: 220px;
  max-width: 420px;
}

.search-input {
  width: 100%;
  padding: 10px 14px 10px 34px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 13.5px;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-jet);
}
.search-input:focus-visible {
  outline: 2px solid var(--accent-jet);
  outline-offset: 2px;
}

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

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--ink-muted);
  font-size: 13px;
}

.sort-group {
  display: flex;
  gap: 8px;
  align-items: center;
}

.sort-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  white-space: nowrap;
}

.sort-select {
  padding: 9px 12px;
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  cursor: pointer;
}

.sort-select:hover {
  border-color: var(--ink);
}
.sort-select:focus {
  border-color: var(--ink);
  outline: none;
}
.sort-select:focus-visible {
  outline: 2px solid var(--accent-jet);
  outline-offset: 2px;
}

/* ---------- Hangar cards (the checklist database) ---------- */

.hangar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  align-items: start;
  gap: 20px;
  margin-top: 20px;
}

.hangar-card {
  background:
    linear-gradient(165deg, rgba(255,255,255,0.035), transparent 40%),
    var(--panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--border);
  box-shadow: var(--shadow);
  padding: 22px;
  color: var(--ink);
  transition: border-color 0.14s ease, box-shadow 0.14s ease, transform 0.14s ease;
  position: relative;
  text-align: center;
}

/* Type-based left border colors (Phase 2) */
.hangar-card[data-type="jet"] {
  border-left-color: var(--accent-jet);
}

.hangar-card[data-type="turboprop"] {
  border-left-color: var(--accent-turboprop);
}

.hangar-card[data-type="ga"] {
  border-left-color: #8a8a8a;
}

.hangar-card[data-type="tutorial"] {
  border-left-color: var(--warn);
}

.hangar-card:hover {
  border-color: var(--accent-jet);
  border-left-color: inherit;
}

.hangar-card[data-type="jet"]:hover {
  border-left-color: var(--accent-jet);
}

.hangar-card[data-type="turboprop"]:hover {
  border-left-color: var(--accent-turboprop);
}

.hangar-card[data-type="tutorial"]:hover {
  border-left-color: var(--warn);
}

.hangar-card__head {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 16px;
  position: relative;
}

.hangar-card__icon {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
}

.hangar-card__icon svg { width: 18px; height: 18px; }

.hangar-card__index {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--ink-muted);
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.hangar-card h2 {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
  text-align: center;
}

/* Aircraft Specs Badges (Phase 2) */
.aircraft-specs {
  display: flex;
  gap: 6px;
  margin-bottom: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.spec-badge {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 2px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.spec-badge.jet {
  background: rgba(0, 212, 255, 0.15);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--accent-jet);
}

.spec-badge.turboprop {
  background: rgba(0, 255, 127, 0.15);
  border: 1px solid rgba(0, 255, 127, 0.3);
  color: var(--accent-turboprop);
}

.spec-badge.ga {
  background: rgba(138, 138, 138, 0.15);
  border: 1px solid rgba(138, 138, 138, 0.3);
  color: #a8a8a8;
}

.spec-badge.tutorial {
  background: rgba(255, 170, 0, 0.15);
  border: 1px solid rgba(255, 170, 0, 0.3);
  color: var(--warn);
}


.hangar-card p {
  margin: 0 0 18px;
  font-size: 12px;
  font-family: var(--mono);
  color: var(--ink-muted);
  text-align: center;
}

.hangar-card__actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ---------- Inline PDF previews ---------- */

.card-viewer {
  position: absolute;
  top: calc(100% + 8px);
  left: 14px;
  right: 14px;
  z-index: 40;
  max-height: 60vh;
  overflow: auto;
  padding: 8px;
  background: rgba(18, 18, 18, 0.35);
  backdrop-filter: blur(7px);
  -webkit-backdrop-filter: blur(7px);
}

.card-viewer[hidden] {
  display: none;
}
@supports not (backdrop-filter: blur(1px)) {
  .card-viewer { background: rgba(18, 18, 18, 0.92); }
}

.card-viewer__frame {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-hover);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  body::after { display: none !important; }
}

/* ---------- Recently Added Section ---------- */

.recently-added {
  margin: 24px 0 32px;
}

.recently-added__heading {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink-muted);
  margin-bottom: 16px;
}

.recently-added__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.recently-added__item {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 16px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.14s ease, box-shadow 0.14s ease, transform 0.14s ease;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.recently-added__item:hover {
  border-color: var(--accent-jet);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.recently-added__name {
  font-weight: 700;
  font-size: 14px;
  color: var(--white);
}

.recently-added__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 11px;
  color: var(--ink-muted);
  font-family: var(--mono);
}

.recently-added__type {
  padding: 2px 6px;
  border-radius: 2px;
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.recently-added__type--jet { background: rgba(0, 212, 255, 0.15); border: 1px solid rgba(0, 212, 255, 0.3); color: #00d4ff; }
.recently-added__type--turboprop { background: rgba(0, 255, 127, 0.15); border: 1px solid rgba(0, 255, 127, 0.3); color: #00ff7f; }
.recently-added__type--ga { background: rgba(138, 138, 138, 0.15); border: 1px solid rgba(138, 138, 138, 0.3); color: #a8a8a8; }
.recently-added__type--tutorial { background: rgba(255, 170, 0, 0.15); border: 1px solid rgba(255, 170, 0, 0.3); color: #ffaa00; }

/* ---------- Footer ---------- */

.site-footer {
  max-width: 1240px;
  margin: 34px auto 0;
  padding: 18px 20px 30px;
  text-align: center;
  color: var(--ink-muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.03em;
}

/* ---------- Responsive ---------- */

@media (max-width: 360px) {
  .hangar-grid { grid-template-columns: 1fr; }
  .hangar-card__actions { flex-direction: column; }
  .btn { width: 100%; text-align: center; }
}

@media (min-width: 768px) and (max-width: 1024px) {
  .hangar-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .titleblock h1 { font-size: 30px; }

  .hangar-grid {
    grid-template-columns: 1fr;
  }

  .btn {
    padding: 11px 18px;
    font-size: 13px;
  }

  .hangar-card {
    padding: 18px;
  }

  .hangar-card h2 {
    font-size: 16px;
  }
}

/* ---------- Print ---------- */

@media print {
  :root { color-scheme: light; }
  body { background: #fff !important; color: #000; font-size: 11px; background-image: none; }
  body::after { display: none !important; }

  .btn, .site-footer { display: none !important; }
  .site-nav { display: none !important; }
  .card-viewer { display: none !important; }
  .modal-overlay, .controls-section { display: none !important; }

  .masthead {
    position: static;
    background: #fff !important;
    border-bottom: 2px solid #000;
  }
  .brand, .brand__mark { color: #000 !important; border-color: #000 !important; }

  .page { padding: 0; max-width: 100%; }

  .hangar-grid { display: block; }
  .hangar-card { margin-bottom: 12pt; }
  a[href^="/pdfs"]::after { content: " (" attr(href) ")"; font-size: 9pt; }

  .titleblock, .disclaimer, .hangar-card {
    background: #fff !important;
    box-shadow: none !important;
    border: 1px solid #999;
    color: #000;
    break-inside: avoid;
  }

  .titleblock__deco { display: none !important; }
  .mark-corners::before, .mark-corners::after { background: none; }

  .titleblock h1, .titleblock .subtitle, .titleblock .tag,
  .hangar-card h2, .hangar-card p, .hangar-card__index {
    color: #000 !important;
  }
  .hangar-card__icon { color: #000; border-color: #000; }

  .section-label { color: #000; }
  .section-label::after {
    opacity: 1;
    background-image: repeating-linear-gradient(90deg, #999 0 1px, transparent 1px 10px);
  }

  .disclaimer { color: #000; border-left: 3px solid #000; }
  .disclaimer strong { color: #000; }
}