/* ==========================================================================
   iPhone 2050 — a launch film
   Single-theme by intent: this is a darkened room with a screen in it.
   Every colour is painted explicitly so the page holds on any host ground.
   ========================================================================== */

:root {
  color-scheme: dark;

  --void:      #04050A;
  --void-2:    #080A11;
  --void-3:    #0C0F17;
  --ink:       #F6F7FA;
  --ink-soft:  #A2A9B6;
  --ink-faint: #5A616E;
  --rule:      #191D27;
  --rule-lit:  #2A3040;

  /* The 1977 spectrum — the only saturated colour in the film */
  --s1: #61BB46;
  --s2: #FDB827;
  --s3: #F5821F;
  --s4: #E03A3E;
  --s5: #963D97;
  --s6: #009DDC;

  --spectrum: linear-gradient(90deg,
    var(--s1) 0 16.66%, var(--s2) 16.66% 33.33%, var(--s3) 33.33% 50%,
    var(--s4) 50% 66.66%, var(--s5) 66.66% 83.33%, var(--s6) 83.33% 100%);

  --display: "Archivo", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --body:    "Instrument Sans", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --gutter: clamp(20px, 7vw, 130px);
}

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

html { scroll-behavior: smooth; background: var(--void); }

body {
  margin: 0;
  background: var(--void);
  color: var(--ink);
  font-family: var(--body);
  font-size: clamp(16px, 1.02vw, 18px);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--s6); color: #fff; }
a { color: inherit; }

/* --- Room tone: grain + vignette ---------------------------------------- */

.grain, .vignette {
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
}
.grain {
  opacity: .19;
  mix-blend-mode: overlay;
  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='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}
.vignette {
  background:
    radial-gradient(130% 92% at 50% 44%, transparent 42%, rgba(0,0,0,.52) 100%),
    linear-gradient(180deg, rgba(0,0,0,.42) 0%, transparent 16%, transparent 84%, rgba(0,0,0,.5) 100%);
}

/* --- The spectrum rule: read progress ------------------------------------ */

.spectrum {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  height: calc(3px + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  background: rgba(255,255,255,.055);
  pointer-events: none;
}
.spectrum__fill {
  height: 3px;
  width: 100%;
  background: var(--spectrum);
  transform: scaleX(var(--progress, 0));
  transform-origin: 0 50%;
}

/* --- Navigation ---------------------------------------------------------- */

.nav {
  position: fixed;
  top: calc(env(safe-area-inset-top, 0px) + 3px);
  left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px var(--gutter);
  background: linear-gradient(180deg, rgba(4,5,10,.82) 0%, rgba(4,5,10,0) 100%);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  mask-image: linear-gradient(180deg, #000 60%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, #000 60%, transparent 100%);
}
.nav__mark {
  font-family: var(--display);
  font-weight: 700;
  font-size: .92rem;
  letter-spacing: -.02em;
  font-variation-settings: "wdth" 92;
}
.nav__right { display: flex; align-items: center; gap: clamp(14px, 2.2vw, 28px); }
.nav__links {
  display: none;
  gap: clamp(14px, 2.2vw, 28px);
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
@media (min-width: 720px) { .nav__links { display: flex; } }
.nav__links a { text-decoration: none; transition: color .25s ease; }
.nav__links a:hover, .nav__links a:focus-visible { color: var(--ink); }

.nav__cta {
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--void);
  background: var(--ink);
  padding: 9px 16px;
  border-radius: 999px;
  white-space: nowrap;
  transition: transform .3s cubic-bezier(.2,.7,.2,1), background .3s ease;
}
.nav__cta:hover { transform: translateY(-1px); background: #fff; }

/* --- Type -------------------------------------------------------------- */

.eyebrow {
  font-family: var(--mono);
  font-size: clamp(.62rem, .72vw, .72rem);
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0;
}

.headline {
  font-family: var(--display);
  font-weight: 800;
  font-variation-settings: "wdth" 88;
  letter-spacing: -.05em;
  line-height: .86;
  text-wrap: balance;
  margin: 0;
}

.prose {
  max-width: 34rem;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.25vw, 1.16rem);
  line-height: 1.66;
}
.prose strong { color: var(--ink); font-weight: 600; }

.wrap { padding-inline: var(--gutter); }

/* --- Hero ---------------------------------------------------------------- */

.hero {
  position: relative;
  min-height: 92vh;
  min-height: 92svh;
  display: grid;
  align-content: center;
  gap: clamp(30px, 5vw, 60px);
  padding-block: clamp(110px, 16vh, 190px) clamp(60px, 10vh, 110px);
  grid-template-columns: minmax(0, 1fr);
  overflow: hidden;
}
@media (min-width: 980px) {
  .hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr);
    align-items: center;
  }
}

.hero__glow {
  position: absolute;
  z-index: -1;
  width: min(1100px, 130vw);
  aspect-ratio: 1;
  right: -18%;
  top: 50%;
  translate: 0 -50%;
  filter: blur(120px);
  opacity: .34;
  background:
    radial-gradient(closest-side, var(--s6), transparent 72%),
    radial-gradient(closest-side at 62% 58%, var(--s5), transparent 70%);
  animation: bloom 22s ease-in-out infinite alternate;
}
@keyframes bloom {
  from { transform: scale(1) translate(0,0); opacity: .26; }
  to   { transform: scale(1.18) translate(-4%, 3%); opacity: .42; }
}

.hero__title {
  font-family: var(--display);
  font-weight: 800;
  font-variation-settings: "wdth" 86;
  font-size: clamp(3.8rem, 14.5vw, 12rem);
  line-height: .82;
  letter-spacing: -.062em;
  margin: 20px 0 0;
}
.hero__deck {
  font-family: var(--display);
  font-weight: 300;
  font-variation-settings: "wdth" 100;
  font-size: clamp(1.35rem, 3.4vw, 2.5rem);
  letter-spacing: -.035em;
  line-height: 1.1;
  color: var(--ink-soft);
  margin: 26px 0 0;
}
.hero__deck em { font-style: normal; color: var(--ink); }
.hero__lede { margin-top: 28px; }

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 26px;
  margin-top: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 15px 28px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: var(--ink);
  color: var(--void);
  cursor: pointer;
  transition: transform .3s cubic-bezier(.2,.7,.2,1), background .3s ease, border-color .3s ease, color .3s ease;
}
.btn:hover { transform: translateY(-2px); background: #fff; }
.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule-lit);
}
.btn--ghost:hover { background: rgba(255,255,255,.05); border-color: var(--ink-faint); }

.hero__scroll {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: clamp(40px, 7vh, 76px);
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.hero__scroll i {
  display: block;
  width: 54px;
  height: 1px;
  background: linear-gradient(90deg, var(--ink-faint), transparent);
  position: relative;
  overflow: hidden;
}
.hero__scroll i::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 18px;
  background: var(--ink);
  animation: sweep 2.6s ease-in-out infinite;
}
@keyframes sweep {
  0%, 100% { transform: translateX(-20px); opacity: 0; }
  40%      { opacity: 1; }
  70%      { transform: translateX(54px); opacity: 0; }
}

/* --- The device ---------------------------------------------------------- */

.device {
  position: relative;
  width: min(290px, 70vw);
  max-width: 100%;
  aspect-ratio: 9 / 19.2;
  margin-inline: auto;
  border-radius: 13% / 6.2%;
  background: #010103;
  border: 1px solid rgba(255,255,255,.14);
  overflow: hidden;
  isolation: isolate;
  box-shadow:
    0 1px 1px rgba(255,255,255,.09) inset,
    0 40px 90px -30px rgba(0,0,0,.9),
    0 0 120px -30px rgba(0,157,220,.35);
}
.device__light {
  position: absolute;
  inset: -36%;
  filter: blur(46px);
  opacity: .85;
  background:
    radial-gradient(38% 28% at 26% 20%, var(--s6) 0%, transparent 68%),
    radial-gradient(34% 26% at 74% 30%, var(--s5) 0%, transparent 66%),
    radial-gradient(40% 30% at 30% 58%, var(--s4) 0%, transparent 66%),
    radial-gradient(34% 26% at 76% 66%, var(--s3) 0%, transparent 64%),
    radial-gradient(36% 26% at 38% 86%, var(--s2) 0%, transparent 64%),
    radial-gradient(34% 26% at 70% 94%, var(--s1) 0%, transparent 64%);
  animation: drift 28s ease-in-out infinite alternate;
}
@keyframes drift {
  from { transform: translate3d(-3%, -2%, 0) scale(1.02) rotate(0deg); }
  to   { transform: translate3d(4%, 3%, 0) scale(1.16) rotate(8deg); }
}
.device__veil {
  position: absolute; inset: 0;
  background:
    radial-gradient(120% 70% at 50% 0%, rgba(0,0,0,.42) 0%, transparent 58%),
    radial-gradient(120% 80% at 50% 108%, rgba(0,0,0,.72) 0%, transparent 60%);
}
.device__sheen {
  position: absolute; inset: 0;
  background: linear-gradient(107deg, rgba(255,255,255,.13) 0%, transparent 32%, transparent 68%, rgba(255,255,255,.06) 100%);
  mix-blend-mode: screen;
}
.device__hud {
  position: absolute;
  left: 0; right: 0; bottom: 8%;
  text-align: center;
  font-family: var(--mono);
  font-size: .58rem;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: rgba(255,255,255,.62);
}
.device__hud span {
  display: block;
  font-size: 2rem;
  letter-spacing: -.03em;
  font-weight: 200;
  margin-bottom: 4px;
  color: #fff;
}

/* --- Chapters: one headline per screen ----------------------------------- */

.chapter {
  position: relative;
  min-height: 185vh;
  min-height: 185svh;
}
.chapter__stage {
  position: sticky;
  top: 0;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  align-content: center;
  padding-block: clamp(80px, 14vh, 150px);
  overflow: hidden;
}
.chapter__grade {
  position: absolute;
  z-index: -1;
  inset: 0;
  background: radial-gradient(58% 48% at var(--gx, 22%) 44%, color-mix(in srgb, var(--tint, var(--s6)) 32%, transparent) 0%, transparent 70%);
  opacity: .5;
  filter: blur(70px);
}

.chapter__n {
  font-family: var(--mono);
  font-size: .64rem;
  letter-spacing: .3em;
  color: var(--ink-faint);
  margin: 0 0 clamp(20px, 3vw, 34px);
}
.chapter__n b { color: var(--ink); font-weight: 400; }

.chapter__h {
  font-size: clamp(2.6rem, 9.2vw, 8.4rem);
  max-width: 14ch;
}
.chapter__p {
  margin-top: clamp(26px, 3.6vw, 44px);
  max-width: 36rem;
}
.chapter__tag {
  display: inline-block;
  margin-top: clamp(26px, 3.4vw, 40px);
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink);
  padding-bottom: 5px;
  border-bottom: 2px solid var(--tint, var(--s6));
}

/* The film moves; JS sets --op and --dy per chapter. Static fallback = visible. */
.chapter__move {
  opacity: var(--op, 1);
  transform: translate3d(0, var(--dy, 0px), 0);
  will-change: opacity, transform;
}

/* --- Specifications ------------------------------------------------------ */

.specs {
  position: relative;
  background: var(--void-2);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding-block: clamp(90px, 16vh, 180px);
}
.specs__head { max-width: 40rem; }
.specs__head .headline { font-size: clamp(2.2rem, 6.6vw, 5rem); margin-top: 18px; }

.figures {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: clamp(36px, 5vw, 70px) clamp(30px, 5vw, 70px);
  margin-top: clamp(56px, 9vh, 104px);
}
.figure__v {
  font-family: var(--display);
  font-weight: 300;
  font-variation-settings: "wdth" 96;
  font-size: clamp(3rem, 6.4vw, 5.2rem);
  line-height: .9;
  letter-spacing: -.05em;
  font-variant-numeric: tabular-nums;
  margin: 0;
}
.figure__v small {
  font-family: var(--mono);
  font-size: .2em;
  font-weight: 400;
  letter-spacing: .1em;
  color: var(--ink-faint);
  margin-left: .4em;
  vertical-align: baseline;
}
.figure__k {
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}

.table {
  margin-top: clamp(60px, 9vh, 100px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0 clamp(30px, 5vw, 80px);
}
.row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
}
.row dt {
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.row dd {
  margin: 0;
  font-family: var(--mono);
  font-size: .94rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.specs__note {
  margin-top: 36px;
  max-width: 44rem;
  font-family: var(--mono);
  font-size: .68rem;
  line-height: 2;
  letter-spacing: .04em;
  color: var(--ink-faint);
}

/* --- Reserve ------------------------------------------------------------- */

.reserve {
  position: relative;
  padding-block: clamp(90px, 18vh, 200px);
  overflow: hidden;
}
.reserve__glow {
  position: absolute;
  z-index: -1;
  inset: auto 0 -40% 0;
  height: 90%;
  filter: blur(110px);
  opacity: .3;
  background: radial-gradient(60% 100% at 50% 100%,
    color-mix(in srgb, var(--s6) 60%, transparent), transparent 70%);
}
.reserve__head { text-align: center; max-width: 44rem; margin-inline: auto; }
.reserve__head .headline { font-size: clamp(2.6rem, 8.2vw, 6.4rem); margin-top: 20px; }
.reserve__head .prose { margin: 28px auto 0; }

.panel {
  margin: clamp(48px, 7vh, 80px) auto 0;
  max-width: 660px;
  background: var(--void-3);
  border: 1px solid var(--rule);
  border-radius: 22px;
  padding: clamp(24px, 4vw, 42px);
}
.panel__rule { height: 3px; background: var(--spectrum); border-radius: 999px; margin-bottom: clamp(24px, 3.4vw, 34px); }

.field + .field { margin-top: 30px; }
.field__k {
  font-family: var(--mono);
  font-size: .64rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 14px;
}
.opts { display: flex; flex-wrap: wrap; gap: 10px; }
.opt {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--rule-lit);
  border-radius: 999px;
  padding: 11px 18px;
  cursor: pointer;
  transition: color .25s ease, border-color .25s ease, background .25s ease;
}
.opt:hover { color: var(--ink); border-color: var(--ink-faint); }
.opt[aria-pressed="true"] {
  color: var(--void);
  background: var(--ink);
  border-color: var(--ink);
}
.opt i {
  display: inline-block;
  width: 9px; height: 9px;
  border-radius: 50%;
  margin-right: 9px;
  vertical-align: -1px;
  background: var(--swatch, #555);
  border: 1px solid rgba(255,255,255,.28);
}

.panel__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--rule);
}
.panel__sum {
  font-family: var(--mono);
  font-size: .72rem;
  line-height: 1.8;
  color: var(--ink-soft);
}
.panel__sum b { color: var(--ink); font-weight: 500; }

.done { text-align: center; padding: 8px 0 4px; }
.done__k {
  font-family: var(--mono);
  font-size: .64rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--s1);
  margin: 0;
}
.done__code {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(2rem, 6vw, 3.4rem);
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  margin: 16px 0 0;
}
.done__p { font-family: var(--mono); font-size: .7rem; line-height: 1.9; color: var(--ink-faint); margin: 18px auto 0; max-width: 34rem; }
.done__again {
  margin-top: 24px;
  background: none;
  border: 0;
  border-bottom: 1px solid var(--rule-lit);
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  padding: 0 0 4px;
  cursor: pointer;
}
.done__again:hover { color: var(--ink); border-color: var(--ink); }

.disclaimer {
  margin: 22px auto 0;
  max-width: 660px;
  font-family: var(--mono);
  font-size: .64rem;
  line-height: 1.9;
  letter-spacing: .04em;
  color: var(--ink-faint);
  text-align: center;
}

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

.foot {
  border-top: 1px solid var(--rule);
  padding-block: 40px 56px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 40px;
  justify-content: space-between;
  align-items: flex-start;
  font-family: var(--mono);
  font-size: .64rem;
  line-height: 1.95;
  letter-spacing: .05em;
  color: var(--ink-faint);
}
.foot p { margin: 0; max-width: 44rem; }

/* --- Load sequence ------------------------------------------------------- */

@media (prefers-reduced-motion: no-preference) {
  .lift { opacity: 0; transform: translateY(24px); animation: lift 1s cubic-bezier(.2,.7,.2,1) both; }
  @keyframes lift { to { opacity: 1; transform: none; } }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .device__light, .hero__glow, .hero__scroll i::after { animation: none; }
  .chapter { min-height: 0; }
  .chapter__stage { position: static; min-height: 0; padding-block: clamp(60px, 10vh, 110px); }
  .chapter__move { opacity: 1 !important; transform: none !important; }
}

:focus-visible { outline: 2px solid var(--s6); outline-offset: 3px; border-radius: 3px; }