/* =================================================================
   THE LONG WAY HOME
   A goodbye told as a journey through deep space.
   Design language: near-black void, one cold blue spent at the start,
   one warm light (#FFB36B) that opens and closes the piece.
   ================================================================= */

/* ---------- Design tokens ---------------------------------------- */
:root {
  /* Palette — restrained; accents almost never appear together */
  --bg:            #04050A;   /* near-black void (not pure #000, so bloom reads) */
  --bg-true:       #02030A;   /* reserved for the held-stillness beats */
  --cold:          #8FB8E0;   /* Earth's blue — spent once, never returns */
  --nebula-core:   #1B1E3C;
  --ember:         #C2724A;
  --thread:        #2FB9A6;   /* the one impossible teal */
  --violet:        #C68BFF;   /* the nebula's emotional peak */
  --warm:          #FFB36B;   /* THE load-bearing hue: porch light → last star */
  --text-high:     #EAF0FF;   /* awe lines */
  --text-whisper:  #8A93A8;   /* the voice of the machine */

  /* Type */
  --display: "Fraunces", "Times New Roman", serif;
  --ui:      "Inter", system-ui, -apple-system, sans-serif;

  /* Motion */
  --ease-soft: cubic-bezier(0.22, 1, 0.36, 1);     /* expo.out-ish — words settle */
  --ease-drift: cubic-bezier(0.65, 0, 0.35, 1);    /* power2.inOut — drifting */

  /* Layout */
  --gutter: clamp(1.4rem, 5vw, 6rem);
  --rail-color: var(--warm);
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--ui);
  background: var(--bg);
  color: var(--text-high);
  overflow-x: hidden;
  /* Lenis controls scroll; keep native momentum off until JS decides */
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Hide everything but the preloader until the reveal */
body.is-loading { overflow: hidden; height: 100vh; }

/* When JS is absent or fails, never trap the user behind the loader */
.no-js .preloader { display: none; }

::selection { background: rgba(255, 179, 107, 0.25); color: #fff; }

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

/* =================================================================
   WEBGL CANVAS + ATMOSPHERE OVERLAYS
   ================================================================= */
.webgl {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
  opacity: 0;                       /* faded up by the preloader reveal */
  transition: opacity 1.6s var(--ease-drift);
  pointer-events: none;
}
body.is-ready .webgl { opacity: 1; }

/* CSS-only nebula shown only if WebGL is unsupported */
.webgl-fallback {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: none;
  background:
    radial-gradient(120% 80% at 50% 120%, rgba(198, 139, 255, 0.18), transparent 55%),
    radial-gradient(90% 60% at 70% 30%, rgba(47, 185, 166, 0.10), transparent 60%),
    radial-gradient(70% 50% at 20% 80%, rgba(194, 114, 74, 0.14), transparent 60%),
    var(--bg);
}
body.no-webgl .webgl-fallback { display: block; }
body.no-webgl .webgl { display: none; }

/* Film grain — animated, very subtle, costs nothing on the GPU */
.grain {
  position: fixed;
  inset: -50%;
  z-index: 2;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 6s steps(6) infinite;
}
@keyframes grain {
  0%   { transform: translate(0, 0); }
  20%  { transform: translate(-6%, 4%); }
  40%  { transform: translate(4%, -6%); }
  60%  { transform: translate(-4%, 6%); }
  80%  { transform: translate(6%, -4%); }
  100% { transform: translate(0, 0); }
}

/* Cinematic vignette */
.vignette {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: radial-gradient(120% 120% at 50% 50%, transparent 55%, rgba(0, 0, 0, 0.55) 100%);
}

/* =================================================================
   PRELOADER
   ================================================================= */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg-true);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
}
.preloader__inner { display: flex; flex-direction: column; align-items: center; gap: 1.6rem; }
.preloader__label {
  font-family: var(--ui);
  font-size: 0.7rem;
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  color: var(--text-whisper);
}
.preloader__count {
  font-family: var(--display);
  font-weight: 300;
  font-variation-settings: "opsz" 80;
  display: flex;
  align-items: baseline;
  color: var(--text-high);
  line-height: 1;
}
.preloader__num { font-size: clamp(4rem, 16vw, 9rem); font-variant-numeric: tabular-nums; }
.preloader__pct { font-size: clamp(1.2rem, 3vw, 2rem); margin-left: 0.2em; color: var(--warm); }
.preloader__track {
  width: clamp(160px, 30vw, 320px);
  height: 1px;
  background: rgba(234, 240, 255, 0.14);
  overflow: hidden;
}
.preloader__fill {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cold), var(--warm));
  box-shadow: 0 0 12px var(--warm);
}
.preloader__title {
  position: absolute;
  bottom: clamp(1.5rem, 5vh, 3rem);
  font-family: var(--ui);
  font-size: 0.62rem;
  letter-spacing: 0.5em;
  text-indent: 0.5em;
  color: rgba(138, 147, 168, 0.5);
}

/* =================================================================
   CUSTOM CURSOR
   ================================================================= */
.cursor {
  position: fixed;
  top: 0; left: 0;
  z-index: 90;
  pointer-events: none;
  mix-blend-mode: screen;
  opacity: 0;
  transition: opacity 0.4s ease;
  will-change: transform;
}
body.has-cursor .cursor { opacity: 1; }
.cursor__dot,
.cursor__ring {
  position: absolute;
  top: 0; left: 0;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}
.cursor__dot {
  width: 6px; height: 6px;
  background: var(--warm);
  box-shadow: 0 0 10px 2px rgba(255, 179, 107, 0.6);
}
.cursor__ring {
  width: 34px; height: 34px;
  border: 1px solid rgba(255, 179, 107, 0.5);
  transition: width 0.3s var(--ease-soft), height 0.3s var(--ease-soft),
              border-color 0.3s ease, background-color 0.3s ease;
}
body.cursor-hover .cursor__ring {
  width: 58px; height: 58px;
  border-color: rgba(255, 179, 107, 0.9);
  background: rgba(255, 179, 107, 0.06);
}
/* Finale "hold still" reward: the cursor brightens */
body.cursor-held .cursor__dot { box-shadow: 0 0 22px 6px rgba(255, 179, 107, 0.95); }
body.cursor-held .cursor__ring { border-color: rgba(255, 179, 107, 0.95); width: 70px; height: 70px; }

/* =================================================================
   FIXED UI — rail, telemetry, scroll cue
   ================================================================= */
.rail {
  position: fixed;
  top: 0; right: clamp(1rem, 3vw, 2.4rem);
  width: 1px; height: 100vh; height: 100svh;   /* svh tracks the dynamic mobile viewport */
  z-index: 40;
  background: rgba(234, 240, 255, 0.08);
  opacity: 0;
  transition: opacity 1s ease;
}
body.is-ready .rail { opacity: 1; }
.rail__fill {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 0%;
  transform-origin: top;
  background: var(--rail-color);
  box-shadow: 0 0 10px var(--rail-color);
  transition: background-color 1.2s var(--ease-drift), box-shadow 1.2s var(--ease-drift);
}

.telemetry {
  position: fixed;
  left: var(--gutter); bottom: clamp(1.2rem, 4vh, 2.2rem);
  z-index: 40;
  font-family: var(--ui);
  font-size: 0.66rem;
  letter-spacing: 0.28em;
  color: var(--text-whisper);
  font-variant-numeric: tabular-nums;
  display: flex; align-items: center; gap: 0.7em;
  opacity: 0;
  transition: opacity 1s ease;
}
body.is-ready .telemetry { opacity: 0.75; }
.telemetry__dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--warm);
  box-shadow: 0 0 8px var(--warm);
  animation: pulse 3.2s var(--ease-drift) infinite;
}
@keyframes pulse { 0%,100% { opacity: 0.4; } 50% { opacity: 1; } }
#telemetryText { transition: opacity 0.5s ease; }

.scrollcue {
  position: fixed;
  left: 50%; bottom: clamp(1.2rem, 4vh, 2.2rem);
  transform: translateX(-50%);
  z-index: 40;
  display: flex; flex-direction: column; align-items: center; gap: 0.8rem;
  opacity: 0;
  transition: opacity 0.8s ease;
}
body.is-ready .scrollcue { opacity: 0.8; }
body.scrolled .scrollcue { opacity: 0 !important; pointer-events: none; }
.scrollcue__word {
  font-size: 0.6rem; letter-spacing: 0.5em; text-indent: 0.5em;
  color: var(--text-whisper);
}
.scrollcue__line {
  position: relative;
  width: 1px; height: 42px;
  background: rgba(234, 240, 255, 0.12);
  overflow: hidden;
}
.scrollcue__line::after {
  content: "";
  position: absolute; top: 0; left: 0;
  width: 100%; height: 40%;
  background: var(--warm);
  box-shadow: 0 0 8px var(--warm);
  animation: cue 2.6s var(--ease-drift) infinite;
}
@keyframes cue {
  0%   { transform: translateY(-100%); }
  60%  { transform: translateY(250%); }
  100% { transform: translateY(250%); }
}

/* =================================================================
   CONTENT — the six movements
   ================================================================= */
.content { position: relative; z-index: 10; }

.beat {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  padding: 12vh var(--gutter);
  display: flex;
  flex-direction: column;
}
.beat--center { align-items: center; justify-content: center; text-align: center; }
.beat--tall { min-height: 230vh; }                 /* weaponise the emptiness */
/* Finale rests in the last viewport: star held high, words beneath it. */
.beat--finale { min-height: 120vh; justify-content: flex-end; padding-bottom: 24vh; }

.beat__inner {
  position: relative;
  max-width: min(92vw, 60rem);
  /* faint scrim so type always wins over the busiest frames */
  isolation: isolate;
}
.beat__inner::before {
  content: "";
  position: absolute;
  inset: -18% -12%;
  z-index: -1;
  background: radial-gradient(60% 60% at 50% 50%, rgba(2, 3, 10, 0.55), transparent 75%);
  pointer-events: none;
}

/* For the tall planets beat, pin the words near the top so the
   long emptiness below is felt as content, not as a layout gap. */
.beat--tall { justify-content: flex-start; }
.beat--tall .beat__inner { margin-top: 12vh; }

.eyebrow {
  font-family: var(--ui);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  text-transform: uppercase;
  color: var(--text-whisper);
  margin-bottom: clamp(1.4rem, 3vw, 2.4rem);
}

.headline {
  font-family: var(--display);
  font-weight: 380;
  font-variation-settings: "opsz" 144, "SOFT" 0, "WONK" 0;
  font-size: clamp(2.6rem, 8vw, 7rem);
  line-height: 0.98;
  letter-spacing: 0.005em;
  color: var(--text-high);
  text-wrap: balance;
}
.headline--hero { font-size: clamp(2.9rem, 9vw, 8rem); }
.headline--finale {
  font-size: clamp(2.4rem, 6.2vw, 5.6rem);
  letter-spacing: -0.012em;
  line-height: 1.08;
}
.headline--bloom { text-shadow: 0 0 60px rgba(198, 139, 255, 0.35); }

.sub {
  font-family: var(--ui);
  font-weight: 400;
  font-size: clamp(1rem, 1.4vw, 1.18rem);
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--text-high);
  opacity: 0.82;
  max-width: 36ch;
  margin: clamp(1.6rem, 3vw, 2.4rem) auto 0;
}
.sub--italic {
  font-family: var(--display);
  font-style: italic;
  font-weight: 360;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  opacity: 0.92;
  letter-spacing: 0;
  max-width: 30ch;
}
.sub--final { opacity: 0.7; margin-top: clamp(2rem, 4vw, 3rem); }

.drift {
  position: absolute;
  left: 50%;
  bottom: 14vh;
  transform: translateX(-50%);
  font-family: var(--display);
  font-style: italic;
  font-weight: 320;
  font-size: clamp(1.05rem, 1.8vw, 1.45rem);
  line-height: 1.55;
  text-align: center;
  color: var(--text-high);
  opacity: 0.55;
  max-width: 30ch;
}

.finale__hint {
  margin-top: clamp(2.4rem, 6vh, 4rem);
  font-family: var(--ui);
  font-size: 0.64rem;
  letter-spacing: 0.4em;
  text-indent: 0.4em;
  text-transform: uppercase;
  color: var(--text-whisper);
}

/* ---------- Split-text reveal primitives ------------------------- */
/* Outer span masks; inner span is what we translate/fade. */
.word, .char {
  display: inline-block;
  overflow: hidden;
  vertical-align: top;
}
/* keeps a char-split word on one line so it never breaks mid-letter */
.char-word { display: inline-block; white-space: nowrap; }
.word__inner, .char__inner {
  display: inline-block;
  opacity: 0;             /* GSAP owns the transform — a CSS %-transform reads
                             back as px and corrupts the yPercent animation */
  will-change: transform, opacity;
}
/* Non-split reveal targets */
[data-reveal] { opacity: 0; will-change: transform, opacity; }

/* =================================================================
   FOOTER
   ================================================================= */
.footer {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 2.4rem var(--gutter) clamp(1.6rem, 4vh, 2.6rem);
  z-index: 11;
}
.footer__rule { height: 1px; background: rgba(234, 240, 255, 0.1); margin-bottom: 1.6rem; }
.footer__row { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; }
.footer__row--sub { margin-top: 0.8rem; }
.footer__title { font-family: var(--ui); font-size: 0.72rem; letter-spacing: 0.4em; color: var(--text-high); }
.footer__meta { font-family: var(--ui); font-size: 0.66rem; letter-spacing: 0.18em; color: var(--text-whisper); }
.footer__meta--dim { opacity: 0.6; }
.footer__replay {
  font-family: var(--ui);
  font-size: 0.7rem; letter-spacing: 0.22em;
  color: var(--warm);
  position: relative;
  padding-bottom: 3px;
  transition: color 0.3s ease;
}
.footer__replay::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px; background: var(--warm);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.5s var(--ease-soft);
}
.footer__replay:hover::after { transform: scaleX(1); }

/* =================================================================
   RESPONSIVE
   ================================================================= */
@media (max-width: 768px) {
  :root { --gutter: 1.5rem; }
  .beat--tall { min-height: 180vh; }
  .drift { bottom: 10vh; }
  .rail { right: 0.8rem; }
  .telemetry { font-size: 0.58rem; letter-spacing: 0.2em; }
  /* keep Fraunces from going spindly on small / low-DPI screens */
  .headline { font-weight: 420; text-shadow: 0 0 30px rgba(4, 5, 10, 0.6); }
}

@media (max-width: 768px) and (pointer: coarse) {
  .cursor { display: none; }
}

/* Portrait phones: reduce the long empty beat so it doesn't feel broken */
@media (max-width: 540px) {
  .beat--tall { min-height: 160vh; }
  .scrollcue { display: none; }
  /* SS7: the fixed telemetry ("SIGNAL · HOME") and the absolute footer credit
     ("…built with light") both live at the bottom-left and overlap on phones.
     Lift the footer content clear of the telemetry band, and drop the telemetry
     into the gap below it so they read as two separate lines. */
  .footer { padding-bottom: clamp(3.6rem, 13vh, 5.5rem); }
  .footer__row { row-gap: 0.4rem; }
  .telemetry { bottom: clamp(0.85rem, 2.6vh, 1.4rem); }
}

/* True portrait phones: trim cumulative scroll friction without losing the pacing */
@media (max-width: 540px) and (orientation: portrait) {
  .beat--tall { min-height: 120vh; }
  .beat--finale { min-height: 100vh; padding-bottom: 18vh; }
  .drift { bottom: 8vh; }
}

/* =================================================================
   REDUCED MOTION — a calm, static-friendly fallback
   Everything still readable; ambient motion removed.
   ================================================================= */
@media (prefers-reduced-motion: reduce) {
  .grain { animation: none; opacity: 0.03; }
  .telemetry__dot { animation: none; opacity: 0.8; }
  .scrollcue__line::after { animation: none; transform: translateY(0); height: 100%; opacity: 0.5; }
  .webgl { transition: none; }

  /* Reveal everything immediately — JS also short-circuits the timeline */
  [data-reveal], .word__inner, .char__inner { opacity: 1 !important; transform: none !important; }
  .word, .char { overflow: visible; }
}

/* Reduced-motion class set by JS for finer control (e.g. on the rail fill) */
body.reduced .rail__fill { transition: height 0.3s linear; }