/* ════════════════════════════════════════════════════════
   4AM — an immersive cultural storyworld, under Bangkok
   the lens inverts · the clock keeps the hour · the night
   has a table of contents · scroll is time
   ════════════════════════════════════════════════════════ */

:root{
  --ink:#050508;
  --ink-warm:#0a0705;
  --bone:#f1ebdf;
  --bone-dim:rgba(241,235,223,.62);
  --amber:#ffb84d;
  --cyan:#59d6ff;
  --magenta:#ff4fa3;
  --disp:"Unbounded",sans-serif;
  --serif:"Instrument Serif",Georgia,serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html,body{overflow-x:clip}
html{scroll-behavior:smooth}
body{background:var(--ink);color:var(--bone);font-family:var(--serif);
  transition:background 1.6s ease}
body.dawnlight{background:var(--ink-warm)}
::selection{background:var(--amber);color:var(--ink)}

/* skip link — keyboard users get a quiet door */
.skip{position:fixed;top:.6rem;left:50%;transform:translate(-50%,-200%);
  z-index:200;background:var(--amber);color:var(--ink);
  font-family:var(--serif);font-style:italic;font-size:.95rem;
  padding:.5rem 1.1rem;text-decoration:none;border-radius:0;
  transition:transform .35s cubic-bezier(.16,1,.3,1)}
.skip:focus{transform:translate(-50%,0)}

.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}

/* film grain + vignette — the night has a texture */
#grain{position:fixed;inset:-8%;z-index:80;pointer-events:none;opacity:.08;mix-blend-mode:soft-light;
  background-image:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="200" height="200"><filter id="n"><feTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="2"/></filter><rect width="200" height="200" filter="url(%23n)"/></svg>')}
body::after{content:"";position:fixed;inset:0;z-index:79;pointer-events:none;
  background:radial-gradient(120% 95% at 50% 45%,transparent 60%,rgba(0,0,0,.55) 100%)}

/* ── the lens: everything under your hand inverts ── */
#lens{position:fixed;left:0;top:0;z-index:94;width:88px;height:88px;border-radius:50%;
  pointer-events:none;transform:translate(-200px,-200px);
  -webkit-backdrop-filter:invert(1) hue-rotate(30deg);backdrop-filter:invert(1) hue-rotate(30deg);
  border:1px solid rgba(241,235,223,.25);will-change:transform}
@supports not (backdrop-filter:invert(1)){
  #lens{background:rgba(241,235,223,.9);mix-blend-mode:difference;border:0}
}
@media (pointer:coarse){#lens{display:none}}

/* ── topbar: menu bar + coming-soon banner, fixed at top ── */
#topbar{position:fixed;top:0;left:0;right:0;z-index:95}
#hud{display:flex;justify-content:space-between;align-items:baseline;
  background:var(--ink);
  padding:max(.9rem,env(safe-area-inset-top)) max(1.4rem,env(safe-area-inset-right)) .85rem max(1.4rem,env(safe-area-inset-left));
  border-bottom:1px solid rgba(241,235,223,.06)}
#banner{background:var(--amber);color:var(--ink);text-align:center;
  font-family:var(--disp);font-weight:800;font-size:.62rem;letter-spacing:.12em;
  padding:.5rem 1rem .46rem}
.mark{font-family:var(--disp);font-weight:800;font-size:1.05rem;letter-spacing:.06em;
  color:var(--bone);text-decoration:none}
.hud-r{display:flex;gap:2.4rem;align-items:baseline}
#clock{font-family:var(--disp);font-weight:700;font-size:.95rem;letter-spacing:.14em;
  color:var(--amber);font-variant-numeric:tabular-nums}
#clock.omen{color:#ff5346}

.hud-about{font-family:var(--serif);font-style:italic;font-size:1.02rem;color:var(--bone);
  text-decoration:none;opacity:.8;transition:opacity .3s}
.hud-about:hover,.hud-about:focus-visible{opacity:1}

/* keyboard focus — a quiet amber ring on every reachable thing */
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--amber);outline-offset:4px;
  border-radius:1px}

/* ── reveal: sections breathe in as you arrive ── */
.reveal{opacity:0;transform:translateY(2.4vh);
  transition:opacity 1.4s cubic-bezier(.16,1,.3,1),transform 1.4s cubic-bezier(.16,1,.3,1)}
.reveal.is-visible{opacity:1;transform:none}

/* ════════════════════════════════════════════════════════
   hero — the city is the title; the hour is the subtitle
   ════════════════════════════════════════════════════════ */
#hero{position:relative;height:100vh;height:100dvh;overflow:hidden;background:var(--ink)}
#hero video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  filter:brightness(.86) contrast(1.08) saturate(1.04);
  animation:slowzoom 16s ease-in-out infinite alternate}
@keyframes slowzoom{from{transform:scale(1.04)}to{transform:scale(1.14)}}
#hero::after{content:"";position:absolute;inset:0;z-index:3;pointer-events:none;
  background:radial-gradient(120% 95% at 50% 55%,transparent 32%,rgba(5,5,8,.58) 100%)}
.hero-overlay{position:absolute;inset:0;z-index:5;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;padding:0 1.5rem;pointer-events:none}
.hero-kick{font-family:var(--serif);font-style:italic;color:var(--bone);
  font-size:clamp(.95rem,1.7vw,1.2rem);opacity:.78;letter-spacing:.04em;margin-bottom:clamp(1rem,3vh,2rem);
  text-transform:lowercase;text-shadow:0 1px 12px rgba(0,0,0,.7);
  animation:herofade 1.1s cubic-bezier(.16,1,.3,1) .15s both}
.hero-title{
  --chars:11;
  --cf:0.88;
  font-family:var(--disp);font-weight:800;line-height:.9;color:#fff;
  font-size:clamp(2.5rem,calc(74vw / (var(--chars) * var(--cf))),9rem);
  letter-spacing:.01em;text-transform:uppercase;
  position:relative;will-change:transform,scale;white-space:nowrap;
  text-shadow:0 2px 30px rgba(0,0,0,.55),0 0 60px rgba(5,5,8,.45);
  animation:breathe 7s ease-in-out infinite, herofade 1.1s cubic-bezier(.16,1,.3,1) .3s both}
.hero-colon{color:var(--amber)}
@keyframes breathe{0%,100%{scale:1}50%{scale:1.028}}
@keyframes herofade{from{opacity:0;transform:translateY(1.4rem)}to{opacity:1;transform:none}}
.hero-sub{font-family:var(--serif);font-style:italic;color:var(--bone);
  font-size:clamp(1.1rem,2.2vw,1.6rem);margin-top:clamp(1.4rem,4vh,2.4rem);
  opacity:.96;max-width:44ch;letter-spacing:.01em;
  text-shadow:0 1px 16px rgba(0,0,0,.6);
  animation:herofade 1.1s cubic-bezier(.16,1,.3,1) .5s both}
.hero-scroll{position:absolute;bottom:max(1.6rem,env(safe-area-inset-bottom));left:50%;
  z-index:6;transform:translateX(-50%);pointer-events:none;
  display:flex;flex-direction:column;align-items:center;gap:.6rem;
  animation:herofadecenter 1.1s cubic-bezier(.16,1,.3,1) .7s both}
@keyframes herofadecenter{from{opacity:0;transform:translateX(-50%) translateY(1.4rem)}to{opacity:1;transform:translateX(-50%)}}
.hero-scroll i{display:block;width:2px;height:7vh;
  background:linear-gradient(180deg,transparent,var(--amber));
  box-shadow:0 0 8px rgba(255,184,77,.4);
  animation:draw 2.6s ease-in-out infinite}
.hero-scroll span{font-family:var(--disp);font-weight:800;font-size:.8rem;
  letter-spacing:.3em;color:#fff;text-transform:uppercase;
  text-shadow:0 1px 12px rgba(0,0,0,.8),0 0 16px rgba(5,5,8,.6)}
@keyframes draw{0%{transform:scaleY(0);transform-origin:top}55%{transform:scaleY(1);transform-origin:top}
  56%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ════════════════════════════════════════════════════════
   what is 4AM? — the question in syne, the answer in serif
   ════════════════════════════════════════════════════════ */
#what{position:relative;min-height:110vh;display:flex;align-items:center;justify-content:center;
  overflow:hidden;background:var(--ink);scroll-margin-top:5rem}
#what img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:.42;filter:blur(2px) saturate(1.15)}
#what::after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background:radial-gradient(100% 100% at 50% 50%,rgba(5,5,8,.4),rgba(5,5,8,.85))}
.what-overlay{position:relative;z-index:5;max-width:min(1100px,92vw);
  padding:clamp(3rem,8vh,6rem) 1.5rem}
.what-cols{display:grid;grid-template-columns:1.3fr 1fr;gap:clamp(2.5rem,6vw,5rem);
  align-items:start}
.what-text{min-width:0;text-align:left}
.what-scale{min-width:0;text-align:right}
.what-title{font-family:var(--disp);font-weight:800;
  font-size:clamp(2.2rem,6vw,4rem);letter-spacing:-.02em;
  color:var(--bone);text-transform:lowercase;
  margin-bottom:clamp(1.6rem,4vh,2.4rem);
  text-shadow:0 2px 24px rgba(5,5,8,.8)}
.what-body{font-family:var(--serif);color:var(--bone);
  font-size:clamp(1.05rem,1.8vw,1.4rem);line-height:1.7;letter-spacing:.01em}
.what-body p{margin-bottom:1.2rem}
.what-body p:last-child{margin-bottom:0}
.what-body em{font-style:italic}
.roman{font-style:normal !important;font-weight:400;
  color:var(--amber);letter-spacing:.005em}
.what-scale .scale-kick{font-family:var(--disp);font-weight:800;
  font-size:clamp(.85rem,1.4vw,1.05rem);letter-spacing:.28em;
  color:var(--amber);text-transform:lowercase;margin-bottom:clamp(1rem,2.5vh,1.6rem)}
.what-scale .scale-number{font-family:var(--disp);font-weight:800;line-height:.9;
  font-size:clamp(2rem,3.5vw,3rem);letter-spacing:-.02em;color:var(--amber);
  font-variant-numeric:tabular-nums;margin-bottom:clamp(1rem,2.5vh,1.8rem);
  white-space:nowrap}
.what-scale .scale-unit{font-size:.36em;font-weight:700;letter-spacing:.02em;margin-left:.05em;vertical-align:.12em}
.what-scale .scale-line{font-family:var(--serif);font-style:italic;color:var(--bone);
  font-size:clamp(1rem,1.6vw,1.25rem);line-height:1.55;letter-spacing:.01em;
  max-width:32ch;margin-left:auto}

/* ════════════════════════════════════════════════════════
   inside — a glimpse of the 6,000 m², 2×2 on wide screens
   ════════════════════════════════════════════════════════ */
#inside{background:var(--ink);scroll-margin-top:5rem;
  display:grid;grid-template-columns:1fr 1fr 1fr;gap:1px}
.glimpse{position:relative;width:100%;height:50vh;overflow:hidden;margin:0;
  opacity:0;transition:opacity 1.2s cubic-bezier(.16,1,.3,1)}
.glimpse.is-visible{opacity:1}
.glimpse img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  transform:scale(1.08);transition:transform 2.4s cubic-bezier(.16,1,.3,1);
  filter:saturate(.96) contrast(1.04)}
.glimpse.is-visible img{transform:scale(1)}
/* the fluorescent-forever image — dark, dreamy, sharp center with blurred edges */
.glimpse-dreamy img{filter:brightness(.82) saturate(1.05) contrast(1.02)}
.glimpse-dreamy::before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  -webkit-mask:radial-gradient(128% 128% at 50% 50%,transparent 50%,#000 82%);
          mask:radial-gradient(128% 128% at 50% 50%,transparent 50%,#000 82%)}
@supports not (backdrop-filter:blur(14px)){
  .glimpse-dreamy::before{background:radial-gradient(128% 128% at 50% 50%,transparent 50%,rgba(5,5,8,.55) 100%)}
}
.glimpse::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(180deg,transparent 48%,rgba(5,5,8,.74) 100%)}
.glimpse figcaption{position:absolute;bottom:clamp(1rem,2.4vh,1.6rem);left:clamp(1.1rem,3vw,2rem);
  z-index:2;font-family:var(--serif);font-style:italic;
  font-size:clamp(.95rem,1.5vw,1.2rem);color:var(--bone);letter-spacing:.01em;
  text-shadow:0 1px 14px rgba(0,0,0,.75)}

/* ════════════════════════════════════════════════════════
   footer — the studio + the bar, oriented like the menu bar
   ════════════════════════════════════════════════════════ */
#foot{position:relative;background:var(--ink);scroll-margin-top:5rem;
  padding:clamp(3rem,7vh,5rem) max(1.4rem,env(safe-area-inset-right)) clamp(1.8rem,3.5vh,2.6rem) max(1.4rem,env(safe-area-inset-left));
  border-top:1px solid rgba(241,235,223,.07)}
.foot-about{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,4rem);
  margin-bottom:clamp(2.4rem,5vh,3.4rem)}
.foot-col{min-width:0}
.foot-col:last-child{text-align:right}
.foot-name{font-family:var(--disp);font-weight:800;
  font-size:clamp(1.3rem,2.4vw,1.8rem);letter-spacing:.04em;
  color:var(--amber);text-transform:lowercase;margin-bottom:1.4rem}
.foot-about p{font-family:var(--serif);font-style:italic;color:var(--bone);
  font-size:clamp(1.05rem,1.8vw,1.35rem);line-height:1.65;letter-spacing:.01em;
  margin-bottom:1.2rem;max-width:52ch}
.foot-col:last-child p{margin-left:auto}
.foot-about p:last-child{margin-bottom:0}
.foot-bar{display:flex;justify-content:space-between;align-items:center;gap:2rem;flex-wrap:wrap;
  padding-top:clamp(1.4rem,3vh,2rem);border-top:1px solid rgba(241,235,223,.06);
  margin-bottom:clamp(1rem,2vh,1.4rem)}
.foot-nav{display:flex;gap:1.6rem;flex-wrap:wrap;
  font-family:var(--serif);font-style:italic;font-size:1rem;color:var(--bone);letter-spacing:.01em}
.foot-nav a{color:inherit;text-decoration:none;transition:color .3s}
.foot-nav a:hover,.foot-nav a:focus-visible{color:var(--amber)}
.foot-contact{display:flex;gap:.8rem;flex-wrap:wrap;justify-content:flex-end;
  font-family:var(--serif);font-style:italic;font-size:.95rem;color:var(--bone-dim);letter-spacing:.01em}
.foot-contact a{color:inherit;text-decoration:none;transition:color .3s}
.foot-contact a:hover,.foot-contact a:focus-visible{color:var(--amber)}
.foot-contact span{opacity:.6}
.foot-bottom{display:flex;justify-content:space-between;align-items:baseline;gap:1.5rem;flex-wrap:wrap;
  font-family:var(--serif);font-style:italic;font-size:.85rem;color:var(--bone-dim);
  opacity:.75;letter-spacing:.02em}
.foot-sign{color:var(--amber);opacity:.85}

/* ════════════════════════════════════════════════════════
   responsive — the night folds smaller on phones
   ════════════════════════════════════════════════════════ */
@media (max-width:700px){
  #hud{padding:max(.7rem,env(safe-area-inset-top)) max(1rem,env(safe-area-inset-right)) .7rem max(1rem,env(safe-area-inset-left))}
  .hud-r{gap:1.2rem}
  .mark{font-size:.95rem}
  #clock{font-size:.8rem}
  #banner{font-size:.7rem;letter-spacing:.06em;padding:.5rem .8rem .46rem}
  .hud-about{display:none}
  .hero-kick{font-size:1rem}
  .hero-sub{font-size:1.2rem;text-shadow:0 1px 20px rgba(0,0,0,.85)}
  #hero::before{content:"";position:absolute;inset:0;z-index:4;pointer-events:none;
    background:radial-gradient(85% 55% at 50% 50%,rgba(5,5,8,.7),transparent 72%);
    mix-blend-mode:multiply}
  .what-body{font-size:1.05rem}
  .what-roman,.roman{font-size:1.1rem}
  #what{min-height:auto;padding:clamp(5rem,12vh,7rem) 1.5rem}
  .what-cols{grid-template-columns:1fr;gap:0}
  .what-text,.what-scale{text-align:center}
  .what-scale{padding-top:clamp(3rem,8vh,5rem);margin-top:clamp(2.5rem,6vh,4rem);
    border-top:1px solid rgba(255,184,77,.2)}
  .what-scale .scale-number{font-size:clamp(2.2rem,6vw,4rem)}
  .what-scale .scale-line{margin-left:auto;margin-right:auto}
  #inside{grid-template-columns:1fr}
  .glimpse{height:50vh}
  .glimpse figcaption{font-size:1rem;bottom:clamp(1rem,2.5vh,1.4rem);left:1.2rem}
  .foot-about{grid-template-columns:1fr;gap:1.4rem}
  .foot-about p{font-size:1.05rem;max-width:none}
  .foot-col:last-child{text-align:left}
  .foot-col:last-child p{margin-left:0}
  #foot{padding:clamp(2.4rem,5vh,3rem) max(1rem,env(safe-area-inset-right)) clamp(1.6rem,3vh,2rem) max(1rem,env(safe-area-inset-left))}
  .foot-bar{flex-direction:column;align-items:flex-start;gap:1.2rem}
  .foot-contact{justify-content:flex-start}
  .foot-bottom{flex-direction:column;align-items:flex-start;gap:.5rem;font-size:.78rem}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01s !important;animation-iteration-count:1 !important;
    transition-duration:.2s !important}
  html{scroll-behavior:auto}
  #lens{display:none}
  .reveal{opacity:1;transform:none}
  .hero-scroll i{animation:none}
  #hero video{animation:none;transform:scale(1.06)}
  .hero-title{animation:none}
  .hero-kick,.hero-sub{animation:none;opacity:1;transform:none}
  .hero-scroll{animation:none;opacity:1;transform:translateX(-50%)}
  .glimpse{opacity:1}
  .glimpse img{transform:scale(1);transition:none}
}