/* ============================================================
   ORYON AVIATION
   ============================================================ */

:root{
  --bg:        #0a0806;
  --bg-2:      #120d08;
  --cream:     #f4ecdd;
  --cream-dim: #d8cdb8;
  --gold:      #cba86a;
  --gold-lt:   #e7d3a1;
  --gold-deep: #9c7b43;
  --line:      rgba(203,168,106,0.28);

  --serif: "Cormorant Garamond", Georgia, serif;
  --sans:  "Jost", system-ui, sans-serif;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html,body{
  background:var(--bg);
  color:var(--cream);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body{ min-height:100vh; }
a{ color:inherit; text-decoration:none; }

::selection{ background:var(--gold); color:#1a1206; }

/* ---------- fixed visual layers ---------- */
.layer{
  position:fixed; inset:0;
  width:100%; height:100%;
  pointer-events:none;
}
.seq{ z-index:1; display:block; background:var(--bg); }
.dust{ z-index:2; mix-blend-mode:screen; opacity:0.9; }

.vignette{
  z-index:3;
  background:
    radial-gradient(120% 90% at 50% 42%, transparent 40%, rgba(6,4,2,0.55) 100%),
    linear-gradient(180deg, rgba(6,4,2,0.55) 0%, transparent 22%, transparent 68%, rgba(5,3,1,0.82) 100%);
}
.grain{
  z-index:3;
  opacity:0.05;
  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");
  mix-blend-mode:overlay;
}

/* ============================================================
   LOADER
   ============================================================ */
.loader{
  position:fixed; inset:0; z-index:100;
  background:radial-gradient(120% 120% at 50% 40%, #14100a 0%, #070502 75%);
  display:grid; place-items:center;
  transition:opacity 1.1s var(--ease), visibility 1.1s;
}
.loader.done{ opacity:0; visibility:hidden; }
.loader__inner{ text-align:center; width:min(78vw, 460px); }
.loader__mark{
  font-family:var(--sans); font-weight:200;
  font-size:clamp(2.6rem, 8vw, 5rem);
  letter-spacing:0.42em; text-indent:0.42em;
  color:var(--cream);
}
.loader__sub{
  font-family:var(--serif); font-style:italic; font-weight:300;
  font-size:clamp(1rem,2.4vw,1.5rem);
  color:var(--gold-lt); letter-spacing:0.06em;
  margin-top:-0.2em; margin-bottom:2.4em;
}
.loader__bar{
  height:1px; width:100%;
  background:rgba(203,168,106,0.18);
  overflow:hidden;
}
.loader__bar span{
  display:block; height:100%; width:0%;
  background:linear-gradient(90deg, var(--gold-deep), var(--gold-lt));
  transition:width 0.3s linear;
}
.loader__pct{
  margin-top:1.1em;
  font-weight:200; letter-spacing:0.35em; text-indent:0.35em;
  font-size:0.72rem; color:var(--cream-dim);
}
.loader__pct em{ font-style:normal; opacity:0.5; }

/* ============================================================
   NAV
   ============================================================ */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:20;
  display:flex; align-items:center; justify-content:space-between;
  padding:clamp(1.4rem,3vw,2.4rem) clamp(1.4rem,4vw,3.4rem);
  opacity:0; transform:translateY(-12px);
  transition:opacity 1s var(--ease) .2s, transform 1s var(--ease) .2s;
  mix-blend-mode:screen;
}
.nav.show{ opacity:1; transform:none; }
.nav__brand{
  font-weight:300; font-size:0.82rem;
  letter-spacing:0.34em; color:var(--cream);
}
.nav__brand span{ margin:0 .5em; color:var(--gold); }
.nav__meta{ display:flex; align-items:center; gap:clamp(1rem,3vw,2.2rem); pointer-events:auto; }
.nav__tag{
  font-family:var(--serif); font-style:italic; color:var(--gold-lt);
  font-size:0.95rem; letter-spacing:0.04em;
}
.nav__cta{
  font-size:0.68rem; letter-spacing:0.26em; text-indent:0.26em; text-transform:uppercase;
  padding:0.7em 1.5em; border:1px solid var(--line); border-radius:100px;
  color:var(--cream); transition:.5s var(--ease);
}
.nav__cta:hover{ background:var(--gold); color:#1a1206; border-color:var(--gold); }

/* ============================================================
   CHAPTER RAIL
   ============================================================ */
.rail{
  position:fixed; right:clamp(1.1rem,2.6vw,2.4rem); top:50%;
  transform:translateY(-50%); z-index:20;
  display:flex; flex-direction:column; gap:1.5rem;
  opacity:0; transition:opacity 1s var(--ease);
}
.rail.show{ opacity:1; }
.rail__item{
  display:flex; align-items:center; gap:.85rem;
  justify-content:flex-end; cursor:default;
  opacity:.4; transition:opacity .6s var(--ease);
}
.rail__item i{
  width:7px; height:7px; border-radius:50%;
  border:1px solid var(--gold); position:relative;
}
.rail__item i::after{
  content:""; position:absolute; inset:1.5px; border-radius:50%;
  background:var(--gold-lt); transform:scale(0); transition:transform .5s var(--ease);
}
.rail__item b{
  font-weight:300; font-size:0.62rem; letter-spacing:0.18em; color:var(--gold-lt);
  order:-1; opacity:0;
}
.rail__item span{
  font-family:var(--serif); font-style:italic; font-size:0.98rem;
  color:var(--cream); white-space:nowrap;
  max-width:0; overflow:hidden; opacity:0;
  transition:max-width .6s var(--ease), opacity .5s var(--ease);
}
.rail__item.active{ opacity:1; }
.rail__item.active i::after{ transform:scale(1); }
.rail__item.active span{ max-width:180px; opacity:1; }

/* ============================================================
   STAGE / SCENES (fixed overlays)
   ============================================================ */
.stage{ position:fixed; inset:0; z-index:10; pointer-events:none; }
.scene{
  position:absolute; inset:0;
  display:flex; padding:clamp(1.6rem,6vw,7rem);
  opacity:0; visibility:hidden;
  transition:opacity .9s var(--ease), visibility .9s;
}
.scene.on{ opacity:1; visibility:visible; }

.scene--hero{ align-items:center; justify-content:center; text-align:center; }
.scene--left{ align-items:center; justify-content:flex-start; text-align:left; }
.scene--right{ align-items:center; justify-content:flex-end; text-align:right; }
.scene--outro{ align-items:center; justify-content:center; text-align:center; }

/* readability scrims tied to text side */
.scene--left::before,.scene--right::before{
  content:""; position:absolute; top:0; bottom:0; width:60%;
  pointer-events:none; z-index:-1;
}
.scene--left::before{ left:0;  background:linear-gradient(90deg, rgba(6,4,2,0.78), transparent); }
.scene--right::before{ right:0; background:linear-gradient(270deg, rgba(6,4,2,0.78), transparent); }
.scene--outro::before{
  content:""; position:absolute; inset:0; z-index:-1;
  background:radial-gradient(90% 90% at 50% 50%, rgba(6,4,2,0.72), rgba(6,4,2,0.94));
}

/* ============================================================
   TEXT — reveal mechanics
   ============================================================ */
.line{ display:block; overflow:hidden; }
.line-inner{
  display:block; transform:translateY(115%); opacity:0;
  transition:transform 1.05s var(--ease), opacity 1.05s var(--ease);
  transition-delay:calc(var(--d, 0) * 1ms);
  will-change:transform;
}
.reveal.in .line-inner{ transform:translateY(0); opacity:1; }

/* ---------- HERO ---------- */
.hero{ max-width:min(92vw,1100px); }
.eyebrow{
  font-weight:300; font-size:clamp(0.6rem,1.4vw,0.78rem);
  letter-spacing:0.44em; text-indent:0.44em; text-transform:uppercase;
  color:var(--gold-lt); margin-bottom:clamp(1.4rem,3vw,2.4rem);
}
.wordmark{
  font-weight:100;
  font-size:clamp(4rem, 20vw, 20rem);
  line-height:0.9; letter-spacing:0.14em; text-indent:0.14em;
  color:var(--cream);
  text-shadow:0 0 60px rgba(0,0,0,.4);
}
.hero__serif{
  font-family:var(--serif);
  font-size:clamp(1.6rem,6vw,4.4rem);
  color:var(--gold-lt); margin-top:0.1em;
}
.hero__serif i{ font-style:italic; font-weight:300; letter-spacing:0.02em; }
.hero__cue{
  margin-top:clamp(2.4rem,6vw,4rem);
  display:flex; flex-direction:column; align-items:center; gap:1rem;
  font-size:0.66rem; letter-spacing:0.34em; text-indent:0.34em;
  text-transform:uppercase; color:var(--cream-dim);
}
.cue-track{
  width:1px; height:56px; background:rgba(203,168,106,0.25);
  position:relative; overflow:hidden;
}
.cue-track span{
  position:absolute; top:-40%; left:0; width:100%; height:40%;
  background:linear-gradient(var(--gold-lt), transparent);
  animation:cue 2.2s var(--ease) infinite;
}
@keyframes cue{ 0%{ top:-45%; } 60%,100%{ top:100%; } }

/* ---------- CHAPTERS ---------- */
.chapter{ max-width:min(90vw,620px); }
.scene--right .chapter{ margin-left:auto; }
.chapter__num{
  font-weight:300; font-size:clamp(0.62rem,1.3vw,0.76rem);
  letter-spacing:0.38em; text-indent:0.38em; text-transform:uppercase;
  color:var(--gold); margin-bottom:clamp(1.1rem,2.4vw,1.8rem);
}
.chapter__title{
  font-family:var(--serif); font-weight:300;
  font-size:clamp(2.8rem,8vw,7rem); line-height:0.98;
  letter-spacing:-0.01em; color:var(--cream);
  margin-bottom:clamp(1.4rem,3vw,2.2rem);
}
.chapter__title em{ font-style:italic; color:var(--gold-lt); }
.chapter__body{
  font-weight:300; font-size:clamp(0.95rem,1.5vw,1.12rem);
  line-height:1.9; letter-spacing:0.02em; color:var(--cream-dim);
  max-width:34ch;
}
.scene--right .chapter__body{ margin-left:auto; }
.chapter__body .line{ overflow:hidden; }

/* ---------- OUTRO ---------- */
.outro{ max-width:min(92vw,900px); pointer-events:auto; }
.outro__title{
  font-family:var(--serif); font-weight:300;
  font-size:clamp(2.4rem,7vw,6rem); line-height:1.02;
  color:var(--cream); margin:clamp(1rem,2vw,1.6rem) 0 clamp(2.2rem,5vw,3.4rem);
}
.outro__title em{ font-style:italic; color:var(--gold-lt); }
.outro__cta{
  display:inline-block; pointer-events:auto;
  font-size:0.72rem; letter-spacing:0.28em; text-indent:0.28em; text-transform:uppercase;
  color:var(--cream); padding:1.2em 2.6em;
  border:1px solid var(--line); border-radius:100px;
  position:relative; overflow:hidden; transition:color .6s var(--ease);
}
.outro__cta span{ position:relative; z-index:1; }
.outro__cta::before{
  content:""; position:absolute; inset:0;
  background:linear-gradient(90deg, var(--gold-deep), var(--gold-lt));
  transform:translateY(101%); transition:transform .6s var(--ease);
}
.outro__cta:hover{ color:#1a1206; }
.outro__cta:hover::before{ transform:translateY(0); }
.outro__foot{
  margin-top:clamp(3rem,7vw,5rem);
  display:flex; gap:clamp(1.5rem,5vw,3.5rem); justify-content:center; flex-wrap:wrap;
  font-size:0.64rem; letter-spacing:0.24em; text-transform:uppercase; color:rgba(216,205,184,0.5);
}

/* scroll length */
#scrollspace{ height:820vh; width:1px; pointer-events:none; }

/* reduced motion */
@media (prefers-reduced-motion: reduce){
  .line-inner{ transition-duration:.4s; }
  .cue-track span{ animation:none; }
}

/* mobile tuning */
@media (max-width:640px){
  .rail{ display:none; }
  .wordmark{ letter-spacing:0.1em; }
  .chapter__body{ max-width:30ch; }
  .scene--left::before,.scene--right::before{ width:100%; }
}