@import url('https://fonts.googleapis.com/css2?family=Instrument+Sans:ital,wght@0,400..700;1,400..700&family=Syne:wght@400;500;600;700;800&display=swap');

/* --------------------------------------------------------
   Tokens
   -------------------------------------------------------- */
:root {
  --bg: #050810;
  --glass: rgba(8, 16, 32, .55);
  --glass-border: rgba(255, 255, 255, .08);
  --text: #edf1f5;
  --text-secondary: #a0b0c4;
  --text-muted: #5a6e84;
  --accent: #d4a24a;
  --accent-dim: #b38636;
  --accent-glow: rgba(212, 162, 74, .12);
  --font-display: 'Syne', sans-serif;
  --font-body: 'Instrument Sans', sans-serif;
  --panel-w: 420px;
  --radius: 14px;
  --transition: .55s cubic-bezier(.22, 1, .36, 1);
}

/* --------------------------------------------------------
   Reset
   -------------------------------------------------------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; overflow: hidden; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-body); font-size: 15px; line-height: 1.6; color: var(--text); background: var(--bg); }
a { color: var(--accent); text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
::selection { background: var(--accent); color: var(--bg); }

/* --------------------------------------------------------
   Viewer canvas (Three.js — full screen)
   -------------------------------------------------------- */
#viewer-canvas {
  position: fixed;
  inset: 0;
  z-index: 1;
  width: 100%; height: 100%;
  display: block;
}

/* --------------------------------------------------------
   Vignette
   -------------------------------------------------------- */
.vignette {
  position: fixed; inset: 0; z-index: 3; pointer-events: none;
  background:
    radial-gradient(ellipse at center, transparent 30%, rgba(5, 8, 16, .25) 100%),
    linear-gradient(to top, rgba(5,8,16,.65) 0%, rgba(5,8,16,.3) 15%, transparent 40%),
    linear-gradient(to bottom, rgba(5, 8, 16, .25) 0%, transparent 12%);
}

/* --------------------------------------------------------
   Logo
   -------------------------------------------------------- */
.logo {
  position: fixed;
  top: 1.5rem; left: 2rem;
  z-index: 60;
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.1rem;
  letter-spacing: .04em;
  color: var(--text);
  text-transform: uppercase;
  transition: opacity .3s;
  text-shadow: 0 1px 8px rgba(0,0,0,.5);
}
.logo span { color: var(--accent); }
.logo:hover { opacity: .7; }

/* --------------------------------------------------------
   Search
   -------------------------------------------------------- */
.search {
  position: fixed;
  top: 3.6rem; left: 2rem;
  z-index: 60;
  width: 260px;
}
.search__input {
  width: 100%;
  padding: .5rem .8rem;
  font-family: var(--font-body);
  font-size: .8rem;
  color: var(--text);
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 8px;
  outline: none;
  transition: border-color .2s, background .2s;
}
.search__input::placeholder { color: var(--text-muted); }
.search__input:focus {
  background: rgba(255, 255, 255, .1);
  border-color: rgba(255, 255, 255, .18);
}
.search__results {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0; right: 0;
  max-height: 360px;
  overflow-y: auto;
  background: rgba(8, 16, 32, .92);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: .35rem 0;
}
.search__results.visible { display: block; }
.search__item {
  display: block;
  width: 100%;
  padding: .55rem .9rem;
  text-align: left;
  cursor: pointer;
  transition: background .15s;
}
.search__item:hover { background: rgba(255, 255, 255, .07); }
.search__item-title {
  font-size: .78rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}
.search__item-source {
  font-size: .65rem;
  color: var(--text-muted);
  margin-top: .1rem;
}
.search__empty {
  padding: .6rem .9rem;
  font-size: .75rem;
  color: var(--text-muted);
}
.search__item mark {
  background: none;
  color: var(--accent);
  font-weight: 700;
}

/* --------------------------------------------------------
   Top-right nav
   -------------------------------------------------------- */
.sidenav {
  position: fixed;
  top: 1.5rem; right: 2rem;
  z-index: 60;
  display: flex;
  gap: 2rem;
  align-items: center;
}

.sidenav__link {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  padding: .5rem 0;
  position: relative;
  transition: color .3s;
  text-shadow: 0 1px 6px rgba(0,0,0,.5);
}

.sidenav__link::after {
  content: '';
  position: absolute;
  bottom: .25rem; left: 0;
  width: 0; height: 1px;
  background: var(--text);
  transition: width .3s ease;
}

.sidenav__link:hover { color: var(--text); }
.sidenav__link.active { color: var(--text); }
.sidenav__link.active::after { width: 100%; }

/* --------------------------------------------------------
   Hero
   -------------------------------------------------------- */
.hero {
  position: fixed;
  z-index: 10;
  bottom: 14vh;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
}

[data-state="home"] .hero { opacity: 1; transform: translateX(-50%) translateY(0); }
body:not([data-state="home"]) .hero { opacity: 0; transform: translateX(-50%) translateY(30px); }

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 6rem);
  font-weight: 800;
  line-height: .95;
  letter-spacing: -.03em;
  text-transform: uppercase;
  margin-bottom: .8rem;
  text-shadow: 0 2px 20px rgba(0,0,0,.5), 0 0 60px rgba(5,8,16,.4);
}

.hero__title em { font-style: normal; color: var(--accent); }

.hero__subtitle {
  font-size: clamp(.9rem, 1.2vw, 1.05rem);
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto;
}

/* --------------------------------------------------------
   Panel
   -------------------------------------------------------- */
.panel {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: var(--panel-w);
  z-index: 40;
  background: var(--glass);
  backdrop-filter: blur(32px) saturate(1.5);
  -webkit-backdrop-filter: blur(32px) saturate(1.5);
  border-left: 1px solid var(--glass-border);
  transform: translateX(100%);
  transition: transform var(--transition);
  display: flex; flex-direction: column;
  overflow: hidden;
}

body:not([data-state="home"]) .panel { transform: translateX(0); }

.panel__close {
  position: absolute;
  top: 1.2rem; left: 1.2rem;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  color: var(--text-muted);
  transition: color .25s, background .25s;
  z-index: 2;
}
.panel__close:hover { color: var(--text); background: rgba(255,255,255,.06); }

.panel__body {
  flex: 1;
  overflow-y: auto;
  padding: 4.5rem 2rem 2rem;
  scrollbar-width: thin;
  scrollbar-color: var(--text-muted) transparent;
}
.panel__body::-webkit-scrollbar { width: 4px; }
.panel__body::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 4px; }

.panel__section-label {
  font-size: .7rem; font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: .6rem;
}

.panel__section-title {
  font-family: var(--font-display);
  font-size: 1.5rem; font-weight: 700;
  letter-spacing: -.01em; line-height: 1.15;
  margin-bottom: .6rem;
}

.panel__section-desc {
  font-size: .88rem; color: var(--text-secondary);
  margin-bottom: 2rem; line-height: 1.7;
}

.panel__card {
  display: block;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  margin-bottom: .7rem;
  transition: background .25s, border-color .25s;
  cursor: pointer;
}
.panel__card:hover { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.12); }

.panel__card-number {
  font-family: var(--font-display);
  font-size: 1rem; font-weight: 700;
  color: var(--accent); opacity: .4;
  margin-bottom: .3rem;
}

.panel__card-title {
  font-family: var(--font-display);
  font-size: .95rem; font-weight: 600;
  margin-bottom: .25rem;
}

.panel__card-text {
  font-size: .8rem; color: var(--text-secondary); line-height: 1.6;
}

/* --------------------------------------------------------
   Flight hours
   -------------------------------------------------------- */
.flight-hours {
  position: fixed;
  bottom: 1.5rem; left: 2rem;
  z-index: 20;
  display: flex;
  align-items: baseline;
  gap: .5rem;
  transition: opacity var(--transition);
}

body:not([data-state="home"]) .flight-hours { opacity: .35; }

.flight-hours__value {
  font-family: var(--font-display);
  font-weight: 800; font-size: 1.4rem;
  letter-spacing: .02em;
}

.flight-hours__label {
  font-size: .7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
}

/* --------------------------------------------------------
   Section label
   -------------------------------------------------------- */
.section-label {
  position: fixed;
  bottom: 4rem; left: 2rem;
  z-index: 20;
  font-family: var(--font-display);
  font-size: .7rem; font-weight: 600;
  letter-spacing: .2em; text-transform: uppercase;
  color: var(--accent);
  opacity: 0; transform: translateY(10px);
  transition: opacity .4s, transform .4s;
  pointer-events: none;
}

body:not([data-state="home"]) .section-label { opacity: 1; transform: translateY(0); }

/* --------------------------------------------------------
   Credit
   -------------------------------------------------------- */
.credit {
  position: fixed;
  bottom: .5rem; left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  font-size: .55rem;
  color: var(--text-muted); opacity: .3;
}
.credit a { color: var(--text-muted); }

/* --------------------------------------------------------
   Reader overlay
   -------------------------------------------------------- */
.reader {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(5, 8, 16, .82);
  display: flex; flex-direction: column;
  opacity: 0; visibility: hidden;
  transition: opacity .6s ease, visibility .6s ease;
}
.reader--visible { opacity: 1; visibility: visible; }

.reader__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.reader__back {
  font-family: var(--font-body);
  font-size: .8rem; font-weight: 600;
  color: var(--accent);
  letter-spacing: .04em;
  cursor: pointer;
  transition: opacity .25s;
}
.reader__back:hover { opacity: .7; }

.reader__page {
  font-size: .75rem; color: var(--text-muted);
  letter-spacing: .06em;
}

.reader__body {
  flex: 1; overflow-y: auto;
  padding: 3rem 4rem;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
  scrollbar-width: thin;
  scrollbar-color: var(--text-muted) transparent;
}
.reader__body::-webkit-scrollbar { width: 4px; }
.reader__body::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 4px; }

.reader__chapter {
  font-family: var(--font-display);
  font-size: .7rem; font-weight: 600;
  letter-spacing: .15em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1.5rem;
}

.reader__article-title {
  font-family: var(--font-display);
  font-size: 1.15rem; font-weight: 700;
  margin-bottom: 1rem; line-height: 1.3;
}

.reader__article-text {
  font-size: .92rem; color: var(--text-secondary);
  line-height: 1.8; white-space: pre-wrap;
  margin-bottom: 2.5rem;
}

.reader__nav {
  display: flex; justify-content: center; gap: 1rem;
  padding: 1rem 2.5rem;
  border-top: 1px solid rgba(255,255,255,.06);
}

.reader__btn {
  font-family: var(--font-body);
  font-size: .8rem; font-weight: 600;
  color: var(--text-secondary);
  padding: .6rem 1.5rem;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 8px;
  transition: color .25s, border-color .25s, background .25s;
  cursor: pointer;
}
.reader__btn:hover {
  color: var(--text);
  border-color: rgba(255,255,255,.2);
  background: rgba(255,255,255,.04);
}
.reader__btn:disabled { opacity: .3; pointer-events: none; }

/* --------------------------------------------------------
   Preloader
   -------------------------------------------------------- */
.preloader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  transition: opacity .6s ease .2s, visibility .6s ease .2s;
}
.preloader--hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.preloader__inner { display: flex; flex-direction: column; align-items: center; gap: 1.2rem; }
.preloader__spinner {
  width: 32px; height: 32px;
  border: 2px solid rgba(255,255,255,.08);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
.preloader__text { font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted); }
@keyframes spin { to { transform: rotate(360deg); } }

/* --------------------------------------------------------
   Responsive
   -------------------------------------------------------- */
@media (max-width: 768px) {
  :root { --panel-w: 100%; }

  .sidenav { gap: 1rem; right: 1rem; top: 1.2rem; }
  .sidenav__link { font-size: .6rem; letter-spacing: .06em; }

  .logo { font-size: .95rem; left: 1.2rem; top: 1.2rem; }

  .hero { bottom: 12vh; }
  .hero__title { font-size: clamp(2rem, 7vw, 4rem); }

  .panel__body { padding: 3.5rem 1.2rem 1.2rem; }

  .flight-hours { left: 1.2rem; bottom: 1rem; }
}