/* ============================================================
   IRIDIUM — Liquid Chrome vault entrance
   Deep space + oil-slick iridescence. Geometric DIN/Bahnschrift.
   ============================================================ */

:root {
  /* --- deep space + chrome primitives --- */
  --void:      #05060a;
  --void-2:    #080a11;
  --panel:     #0c0f18;
  --chrome:    #aab0bd;
  --ink:       #eef1f8;
  --ink-dim:   #a6afc2;
  --ink-faint: #6d7688;
  --line:      rgba(158, 172, 200, 0.16);
  --line-2:    rgba(158, 172, 200, 0.32);

  /* --- oil-slick iridescence --- */
  --iris-cyan:    #37e6ff;
  --iris-violet:  #9a6bff;
  --iris-magenta: #ff3fa4;
  --iris-gold:    #ffd27a;
  --iris-teal:    #2bf5c8;
  --deny:         #ff5568;

  /* --- type --- */
  --font-display: "Bahnschrift", "DIN Next", "DIN Alternate", "Eurostile",
                  "Segoe UI Variable Display", "Avenir Next", system-ui, sans-serif;
  --font-ui: "Bahnschrift", "DIN Next", "Segoe UI Variable Text", system-ui, sans-serif;
  --font-mono: "Cascadia Code", "SF Mono", "SFMono-Regular", ui-monospace,
               "Roboto Mono", Consolas, monospace;

  /* --- rhythm --- */
  --pad: clamp(1.25rem, 4vw, 3.5rem);
  --maxw: 46rem;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  min-height: 100dvh;
  color: var(--ink);
  background: var(--void);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow: hidden;
}

/* ---------- skip link ---------- */
.skip {
  position: fixed;
  left: 0; top: 0;
  transform: translateY(-140%);
  z-index: 40;
  margin: 0.6rem;
  padding: 0.55rem 0.9rem;
  border-radius: 0.5rem;
  background: var(--ink);
  color: var(--void);
  font: 600 0.85rem/1 var(--font-ui);
  text-decoration: none;
  transition: transform 0.2s var(--ease);
}
.skip:focus-visible { transform: translateY(0); }

/* ---------- background layers ---------- */
/* First paint: pure CSS molten field so there is never an empty black flash. */
.field {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(120% 90% at 68% 40%, rgba(55, 230, 255, 0.10), transparent 55%),
    radial-gradient(90% 80% at 78% 62%, rgba(154, 107, 255, 0.14), transparent 60%),
    radial-gradient(70% 60% at 62% 30%, rgba(255, 63, 164, 0.10), transparent 62%),
    radial-gradient(140% 120% at 50% 120%, var(--void-2), var(--void) 70%);
}

.stage {
  position: fixed;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0;
  transition: opacity 1.1s var(--ease);
}
body.stage-ready .stage { opacity: 1; }

/* denial shudder on the whole molten field */
body.deny .stage,
body.deny .field { animation: shudder 0.5s var(--ease); }
@keyframes shudder {
  0%, 100% { transform: translate3d(0,0,0); }
  15% { transform: translate3d(-9px, 2px, 0); }
  32% { transform: translate3d(7px, -3px, 0); }
  50% { transform: translate3d(-6px, 3px, 0); }
  68% { transform: translate3d(5px, -2px, 0); }
  84% { transform: translate3d(-3px, 1px, 0); }
}

/* readability scrim, weighted to the lower-left where the copy sits */
.scrim {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(105deg, rgba(5,6,10,0.92) 0%, rgba(5,6,10,0.62) 30%,
                    rgba(5,6,10,0.12) 52%, transparent 66%),
    linear-gradient(0deg, rgba(5,6,10,0.78) 0%, transparent 34%),
    radial-gradient(120% 120% at 50% 50%, transparent 58%, rgba(3,4,8,0.72) 100%);
}

/* crossing bloom overlay */
.bloom {
  position: fixed;
  inset: 0;
  z-index: 30;
  pointer-events: none;
  opacity: 0;
  /* dark bloom by mandate — the chroma seam stays, the white burst dies (photosensitivity) */
  background:
    radial-gradient(60% 120% at 50% 50%, rgba(11,13,18,0.96), rgba(11,13,18,0.7) 60%),
    linear-gradient(90deg, transparent 46%, rgba(55,230,255,0.5) 49%,
                    rgba(255,63,164,0.5) 51%, transparent 54%);
  transition: opacity 0.9s var(--ease);
}
body.crossing .bloom { opacity: 1; }

/* ---------- top bar ---------- */
.topbar {
  position: fixed;
  z-index: 10;
  inset: 0 0 auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: clamp(1rem, 2.4vw, 1.6rem) var(--pad);
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
}
.wordmark .glyph {
  width: 1.55rem;
  height: 1.55rem;
  color: var(--iris-cyan);
  filter: drop-shadow(0 0 10px rgba(55, 230, 255, 0.45));
}
.wordmark b {
  font: 700 1.02rem/1 var(--font-display);
  letter-spacing: 0.42em;
  padding-left: 0.42em; /* balance the tracking */
}
.element {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--line-2);
  border-radius: 0.55rem;
  background: rgba(12, 15, 24, 0.5);
  backdrop-filter: blur(6px);
  font-style: normal;
}
.element .sym { font: 700 1rem/1 var(--font-display); letter-spacing: 0.02em; }
.element .num {
  font: 500 0.7rem/1 var(--font-mono);
  color: var(--iris-cyan);
  transform: translateY(-0.35em);
}

/* ---------- content shell (lower-left, editorial) ---------- */
.shell {
  position: relative;
  z-index: 12;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  gap: clamp(0.9rem, 2vw, 1.35rem);
  max-width: var(--maxw);
  padding: 0 var(--pad) clamp(2.5rem, 7vh, 5rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0;
  font: 600 0.74rem/1 var(--font-ui);
  letter-spacing: 0.34em;
  color: var(--ink-dim);
  text-transform: uppercase;
}
.eyebrow .dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--iris-magenta);
  box-shadow: 0 0 10px var(--iris-magenta);
}

.display {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.7rem, 8.5vw, 5.6rem);
  line-height: 0.96;
  letter-spacing: -0.015em;
  text-wrap: balance;
  color: var(--ink);
}
.display .line2 {
  display: block;
  background: linear-gradient(92deg, var(--iris-cyan), var(--iris-violet) 46%, var(--iris-magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sub {
  margin: 0;
  max-width: 34rem;
  font: 400 clamp(1rem, 1.3vw, 1.15rem)/1.55 var(--font-ui);
  color: var(--ink-dim);
}

/* ---------- the key slot ---------- */
.key { margin: 0.4rem 0 0; width: min(100%, 34rem); }
.key-label {
  display: block;
  margin-bottom: 0.5rem;
  font: 600 0.72rem/1 var(--font-ui);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.slot {
  position: relative;
  display: flex;
  align-items: stretch;
  gap: 0.5rem;
  padding: 0.4rem 0.4rem 0.4rem 0.2rem;
  border-radius: 0.9rem;
  background:
    linear-gradient(180deg, rgba(20, 24, 36, 0.72), rgba(9, 11, 18, 0.72));
  border: 1px solid var(--line-2);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.06),
    inset 0 0 24px rgba(0,0,0,0.5),
    0 18px 50px -24px rgba(0,0,0,0.9);
  backdrop-filter: blur(10px);
  overflow: hidden;
}
/* the molten seam of light running down the slot's leading edge */
.slot::before {
  content: "";
  position: absolute;
  left: 0; top: 8%;
  width: 2px; height: 84%;
  border-radius: 2px;
  background: linear-gradient(180deg, transparent, var(--iris-cyan), var(--iris-violet), transparent);
  box-shadow: 0 0 14px var(--iris-cyan);
  opacity: 0.65;
  transition: opacity 0.3s var(--ease);
}
.slot.is-focused { border-color: transparent; }
.slot.is-focused::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 0.9rem;
  padding: 1px;
  background: linear-gradient(120deg, var(--iris-cyan), var(--iris-violet), var(--iris-magenta), var(--iris-gold));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}
.slot.is-focused::before { opacity: 1; }

.key-input {
  flex: 1;
  min-width: 0;
  padding: 0.95rem 0.6rem 0.95rem 1rem;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: 500 1.1rem/1 var(--font-mono);
  letter-spacing: 0.14em;
  outline: none;
}
.key-input::placeholder { color: var(--ink-faint); letter-spacing: 0.06em; }

.submit {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 1.15rem;
  border: 0;
  border-radius: 0.65rem;
  cursor: pointer;
  color: var(--void);
  background: linear-gradient(135deg, #eaf7ff, #c9d3e6 55%, #9aa6bd);
  font: 700 0.92rem/1 var(--font-display);
  letter-spacing: 0.06em;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.2) inset, 0 8px 22px -12px rgba(55,230,255,0.7);
  transition: transform 0.18s var(--ease), box-shadow 0.25s var(--ease), filter 0.25s var(--ease);
}
.submit .arrow { width: 1.15rem; height: 1.15rem; transition: transform 0.2s var(--ease); }
.submit:hover {
  filter: brightness(1.06);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.35) inset, 0 12px 30px -12px rgba(154,107,255,0.85);
}
.submit:hover .arrow { transform: translateX(3px); }
.submit:active { transform: translateY(1px); }
.submit[aria-busy="true"] { filter: saturate(0.6) brightness(0.9); cursor: progress; }

/* ---------- verdict ---------- */
.verdict {
  margin: 0;
  min-height: 1.3em;
  font: 500 0.95rem/1.4 var(--font-ui);
  letter-spacing: 0.01em;
  color: var(--ink-dim);
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}
.verdict.show { opacity: 1; transform: none; }
.verdict.err { color: var(--deny); }
.verdict.ok { color: var(--iris-teal); }

.rest {
  margin: 0.3rem 0 0;
  font: 500 0.72rem/1 var(--font-ui);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.rest .sep { color: var(--line-2); margin: 0 0.15rem; }

/* ---------- focus ring ---------- */
:focus-visible {
  outline: 2px solid var(--iris-cyan);
  outline-offset: 3px;
  border-radius: 0.4rem;
}
.key-input:focus-visible { outline: none; } /* slot ring handles it */

/* ---------- responsive ---------- */
@media (max-width: 560px) {
  :root { --pad: 1.25rem; }
  .element { display: none; }
  .shell { justify-content: flex-end; }
  .slot { flex-wrap: wrap; }
  .submit { flex: 1; justify-content: center; padding: 0.9rem; }
  .display { font-size: clamp(2.4rem, 13vw, 3.6rem); }
}

@media (min-width: 1100px) {
  .shell { max-width: 52rem; padding-bottom: clamp(3rem, 9vh, 6rem); }
}

/* ============================================================
   GESTURE TECH SHOWCASE — each gesture opens one chrome demo
   ============================================================ */
.gx-hint {
  position: fixed;
  z-index: 11;
  top: clamp(3.4rem, 8vh, 4.4rem);
  right: var(--pad);
  margin: 0;
  font: 600 0.6rem/1 var(--font-ui);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  pointer-events: none;
  opacity: 0.72;
}
.gx-hint .sep { color: var(--line-2); margin: 0 0.1rem; }

.gx {
  position: fixed;
  inset: 0;
  z-index: 34;
  display: grid;
  place-items: center;
  padding: 1rem;
  pointer-events: none;   /* the gate stays reachable underneath */
}
.gx[hidden] { display: none; }

.gx-panel {
  position: relative;
  pointer-events: auto;
  width: min(78vw, 380px);
  max-width: 92vw;
  aspect-ratio: 1 / 1;
  max-height: min(70vh, 380px);
  border-radius: 1.1rem;
  overflow: hidden;
  background: rgba(8, 10, 16, 0.72);
  border: 1px solid var(--line-2);
  box-shadow:
    0 30px 80px -30px rgba(0,0,0,0.9),
    inset 0 1px 0 rgba(255,255,255,0.06);
  backdrop-filter: blur(8px);
  animation: gxpop 0.42s var(--ease);
}
/* iridescent ring — same oil-slick edge as the key slot */
.gx-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(120deg, var(--iris-cyan), var(--iris-violet), var(--iris-magenta), var(--iris-gold));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0.5;
  pointer-events: none;
}
@keyframes gxpop {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

.gx-stage { position: absolute; inset: 0; }
.gx-canvas, .gx-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.gx-label {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 1;
  margin: 0;
  padding: 0.9rem 0.9rem 0.65rem;
  font: 600 0.68rem/1.3 var(--font-ui);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  text-shadow: 0 1px 8px rgba(0,0,0,0.85);
  background: linear-gradient(0deg, rgba(5,6,10,0.9), transparent);
  pointer-events: none;
}

.gx-close {
  position: absolute;
  top: 0.5rem; right: 0.5rem;
  z-index: 2;
  width: 2rem; height: 2rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-2);
  border-radius: 0.55rem;
  background: rgba(8,10,16,0.62);
  color: var(--ink);
  cursor: pointer;
  transition: filter 0.2s var(--ease);
}
.gx-close svg { width: 1rem; height: 1rem; }
.gx-close:hover { filter: brightness(1.3); }

/* landscape phones: keep the panel inside the short axis */
@media (max-height: 460px) {
  .gx-panel { max-height: 82vh; width: min(82vh, 360px); }
  .gx-hint { top: 0.6rem; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important;
      transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  .stage { transition: opacity 0.3s linear; }
  body.deny .stage, body.deny .field { animation: none; }
  .gx-panel { animation: none; }
}

/* exit veil: the LAST painted frame before leaving must match the app's dark canvas (#0b0d12) so the
   browser never shows a bright frame between documents — photosensitivity mandate, applies to every exit */
.exit-veil{ position:fixed; inset:0; z-index:2147483000; background:#0b0d12; opacity:0; pointer-events:none; transition:opacity .3s ease; }
.exit-veil.is-on{ opacity:1; }
@media (prefers-reduced-motion: reduce){ .exit-veil{ transition:none; } }