/* SECTION: hero — single immersive "main frame":
   live 3D VRM Robi center-stage, floating top island (brand + nav),
   chat dock at the bottom (VN-style intro dialog + real AI input),
   side hint cards that slide in during the intro. */

.sec-hero { padding-block: 0; }

.sec-hero .hero-wrap {
  max-width: none;
  margin-inline: 0;
  padding-inline: 0;
}
.sec-hero .hero-stage {
  position: relative;
  /* full-bleed frame: fills the viewport under the nav (56px) */
  height: max(calc(100vh - 56px), 560px);
  border-radius: 0;
  overflow: hidden;
  background: var(--bg-card);
}

/* ---------- layers: backdrop 0 / aurora video 0 / vignette 1 / fallback 1 / billboard 2 / 3D 3 ---------- */
.sec-hero .hero-backdrop {
  position: absolute; inset: 0;
  z-index: 0;
  background: radial-gradient(ellipse 130% 95% at 50% 40%, #101a1d, #070b0c 80%);
}
/* looping 4K aurora hall — the room Robi actually stands in */
.sec-hero .hero-video {
  position: absolute; inset: 0;
  z-index: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 50% 50%;
  pointer-events: none;
  opacity: 0;
  animation: hero-video-in 1.2s var(--ease-glide) 0.15s forwards;
}
@keyframes hero-video-in { to { opacity: 1; } }
/* keeps the chat + billboard readable over the bright aurora */
.sec-hero .hero-vignette {
  position: absolute; inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(to bottom, rgba(7, 11, 12, 0.72) 0%, rgba(7, 11, 12, 0) 26%),
    linear-gradient(to top, rgba(7, 11, 12, 0.82) 0%, rgba(7, 11, 12, 0.25) 22%, rgba(7, 11, 12, 0) 42%),
    radial-gradient(ellipse 78% 62% at 50% 46%, transparent 40%, rgba(7, 11, 12, 0.5) 100%);
}
.sec-hero .hero-fallback {
  position: absolute; inset: 0;
  z-index: 1;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 50% 30%;
  opacity: 1;
  transition: opacity 0.9s var(--ease-glide);
}
.sec-hero .hero-vrm {
  position: absolute; inset: 0;
  z-index: 3;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.9s var(--ease-glide);
  /* lift Robi so the chat dock never covers the hoodie logo */
  transform: translateY(-3.5%);
}
.sec-hero .hero-vrm-ready .hero-vrm { opacity: 1; }
.sec-hero .hero-vrm-ready .hero-fallback { opacity: 0; }
.sec-hero .hero-vrm-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
}

/* ---------- boot FX: scanline while streaming, lime sweep on go-live ---------- */
.sec-hero .hero-scan {
  position: absolute; inset: 0;
  z-index: 4;
  pointer-events: none;
  overflow: hidden;
}
/* drifting scanline: reads as "she is being streamed in" over the static art */
.sec-hero .hero-scan::before {
  content: "";
  position: absolute; left: 0; right: 0; top: 0;
  height: 16%;
  background: linear-gradient(to bottom,
    transparent,
    rgba(209, 254, 23, 0.05) 55%,
    rgba(209, 254, 23, 0.16) 90%,
    rgba(230, 255, 120, 0.75) 99.4%,
    transparent 100%);
  box-shadow: 0 2px 16px rgba(209, 254, 23, 0.28);
  opacity: 0;
  transition: opacity 0.5s ease;
}
.sec-hero .hero-vrm-loading .hero-scan::before {
  opacity: 1;
  animation: heroScanDrift 3.4s linear infinite;
}
@keyframes heroScanDrift {
  from { transform: translateY(-110%); }
  to   { transform: translateY(740%); }
}
/* kill the drifting bar instantly on ready/fail (its transform resets with the
   animation, so a soft fade would flash it at the top of the frame) */
.sec-hero .hero-vrm-ready .hero-scan::before,
.sec-hero .hero-vrm-failed .hero-scan::before { transition: none; opacity: 0; }
/* one-shot materialize bar: rides the reveal edge (sibling of .hero-vrm so the
   clip-path below can't cut it) */
.sec-hero .hero-scan::after {
  content: "";
  position: absolute; left: 5%; right: 5%; top: 100%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, rgba(209, 254, 23, 0.9), transparent);
  box-shadow: 0 0 22px rgba(209, 254, 23, 0.5), 0 0 60px rgba(209, 254, 23, 0.25);
  opacity: 0;
}
.sec-hero .hero-vrm-ready .hero-scan::after {
  animation: heroMaterializeBar 1.05s cubic-bezier(0.22, 1, 0.36, 1) both;
}
@keyframes heroMaterializeBar {
  0%   { top: 100%; opacity: 0; }
  10%  { opacity: 1; }
  85%  { opacity: 1; }
  100% { top: -1%; opacity: 0; }
}
/* live VRM materializes bottom→top in sync with the bar + crossfade */
.sec-hero .hero-vrm-ready .hero-vrm {
  animation: heroMaterialize 1.05s cubic-bezier(0.22, 1, 0.36, 1) both;
}
@keyframes heroMaterialize {
  from { clip-path: inset(100% 0 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}

/* ---------- contest billboard (peeks out around Robi) ---------- */
.sec-hero .hero-billboard {
  position: absolute;
  top: 84px; left: 0; right: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.9s var(--ease-glide);
}
.sec-hero .hero-vrm-ready .hero-billboard { opacity: 1; }
.sec-hero .hero-bb-count {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 14px;
}
.sec-hero .hero-bb-group { display: inline-flex; align-items: baseline; gap: 1px; }
.sec-hero .hero-bb-num { color: var(--text-primary); font-weight: 500; font-variant-numeric: tabular-nums; }
.sec-hero .hero-bb-unit { color: var(--accent); font-size: 12px; font-weight: 500; }
.sec-hero .hero-bb-sep { color: var(--text-faint); font-weight: 200; font-size: 13px; }
.sec-hero .hero-bb-kicker {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
}
.sec-hero .hero-bb-prize {
  display: flex;
  align-items: center;
  gap: clamp(8px, 2vw, 16px);
  color: var(--accent);
  margin-top: -4px;
}
.sec-hero .hero-bb-prize-num {
  font-family: var(--font-display);
  font-size: clamp(52px, 7.5vw, 100px);
  font-weight: 700;
  letter-spacing: var(--ls-display, -0.04em);
  line-height: 1;
  text-shadow: 0 0 44px rgba(209, 254, 23, 0.28);
}
.sec-hero .hero-bb-laurel {
  height: clamp(34px, 6vw, 48px);
  width: auto;
  flex: none;
  color: var(--accent);
}
.sec-hero .hero-bb-laurel-r { transform: scaleX(-1); }

/* ---------- floating terminal chips ---------- */
.sec-hero .hero-chip {
  position: absolute;
  z-index: 4;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  background: var(--bg-overlay-glass);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  animation: hero-chip-bob 5s ease-in-out infinite;
}
.sec-hero .hero-chip-1 { top: 84px; left: 20px; }
.sec-hero .hero-chip-2 { top: 84px; right: 20px; animation-delay: 2.2s; }
.sec-hero .hero-chip-up { color: var(--accent); }
.sec-hero .hero-chip-down { color: var(--red-down); }
@keyframes hero-chip-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

/* ---------- top island ---------- */
.sec-hero .hero-island {
  position: absolute;
  top: 14px; left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  display: flex;
  align-items: center;
  gap: 18px;
  max-width: calc(100% - 32px);
  padding: 8px 8px 8px 16px;
  background: linear-gradient(180deg, rgba(24, 32, 34, 0.38), rgba(9, 13, 14, 0.46));
  -webkit-backdrop-filter: blur(34px) saturate(170%);
  backdrop-filter: blur(34px) saturate(170%);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 18px;
  box-shadow:
    0 12px 32px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.16);
}
.sec-hero .hero-island-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}
.sec-hero .hero-island-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(209, 254, 23, 0.8);
  animation: hero-island-pulse 2.4s ease-in-out infinite;
}
@keyframes hero-island-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}
.sec-hero .hero-island-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text-primary);
  margin: 0;
}
.sec-hero .hero-island-title span { color: var(--text-faint); font-weight: 500; }
.sec-hero .hero-island-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.sec-hero .hero-island-nav .btn { padding: 8px 14px; font-size: 13px; }

/* ---------- side hint cards ---------- */
.sec-hero .hero-hint {
  position: absolute;
  top: 50%;
  z-index: 5;
  width: 248px;
  padding: 12px 14px 14px;
  background: var(--bg-overlay-glass);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-card-lg);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-med, 0.3s) var(--ease-pop),
              transform var(--dur-med, 0.3s) var(--ease-pop),
              visibility 0s linear 0.3s;
}
.sec-hero .hero-hint-left { left: 20px; transform: translate(-14px, -50%); }
.sec-hero .hero-hint-right { right: 20px; transform: translate(14px, -50%); }
.sec-hero .hero-hint.hero-hint-in {
  opacity: 1;
  visibility: visible;
  transform: translate(0, -50%);
  transition: opacity var(--dur-med, 0.3s) var(--ease-pop),
              transform var(--dur-med, 0.3s) var(--ease-pop);
}
.sec-hero .hero-hint-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.sec-hero .hero-hint-k {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
}
.sec-hero .hero-hint-x {
  font-size: 10px;
  line-height: 1;
  padding: 4px;
  color: var(--text-faint);
  transition: color var(--dur-fast) var(--ease-ui);
}
.sec-hero .hero-hint-x:hover { color: var(--text-primary); }
.sec-hero .hero-hint-row {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 7px 8px;
  margin-inline: -8px;
  border-radius: var(--radius-sm);
}
.sec-hero .hero-hint-link { text-decoration: none; transition: background-color var(--dur-fast) var(--ease-ui); }
.sec-hero .hero-hint-link:hover { background: rgba(255, 255, 255, 0.06); }
.sec-hero .hero-hint-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}
.sec-hero .hero-hint-desc { font-size: 12px; color: var(--text-faint); }

/* ---------- chat dock: one frosted glass composer ---------- */
.sec-hero .hero-chat {
  position: absolute;
  bottom: 22px; left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  width: min(1080px, calc(100% - 48px));
}
.sec-hero .hero-glass {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 18px 9px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: linear-gradient(180deg, rgba(24, 32, 34, 0.38), rgba(9, 13, 14, 0.46));
  -webkit-backdrop-filter: blur(34px) saturate(170%);
  backdrop-filter: blur(34px) saturate(170%);
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.16),
    inset 0 -1px 0 rgba(255, 255, 255, 0.05);
}
.sec-hero .hero-dialog {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 2px 2px 0;
}
.sec-hero .hero-dialog-tag {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: #0A0C0D;
  background: var(--accent);
  border-radius: var(--radius-badge);
  padding: 3px 7px;
  margin-top: 1px;
}
.sec-hero .hero-dialog-tag.hero-tag-you { color: var(--text-secondary); background: rgba(255, 255, 255, 0.1); }
.sec-hero .hero-dialog-text {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  min-height: 22px;
}
.sec-hero .hero-dialog-text .tw-caret { margin-left: 1px; }
.sec-hero .hero-suggest {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.sec-hero .hero-sug {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
  transition: color var(--dur-fast) var(--ease-ui),
              border-color var(--dur-fast) var(--ease-ui),
              background-color var(--dur-fast) var(--ease-ui);
}
.sec-hero .hero-sug:hover {
  color: #0A0C0D;
  background: var(--accent);
  border-color: var(--accent);
}
.sec-hero .hero-input {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 5px 5px 5px 16px;
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-radius: 16px;
  transition: border-color var(--dur-fast) var(--ease-ui), background-color var(--dur-fast) var(--ease-ui);
}
.sec-hero .hero-input:focus-within {
  border-color: rgba(209, 254, 23, 0.5);
  background: rgba(0, 0, 0, 0.36);
}
.sec-hero .hero-input-field {
  flex: 1;
  min-width: 0;
  background: none;
  border: none;
  outline: none;
  font-family: var(--font-ui, Inter, sans-serif);
  font-size: 15px;
  color: var(--text-primary);
  padding: 10px 0;
}
.sec-hero .hero-input-field::placeholder { color: var(--text-faint); }
.sec-hero .hero-send {
  flex: none;
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  color: #0A0C0D;
  background: var(--accent);
  box-shadow: 0 0 22px rgba(209, 254, 23, 0.35);
  transition: transform var(--dur-med) var(--ease-pop), opacity var(--dur-fast) var(--ease-ui);
}
.sec-hero .hero-send:hover { transform: scale(1.06); }
.sec-hero .hero-send:disabled { opacity: 0.4; transform: none; box-shadow: none; }
.sec-hero .hero-model-line {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-faint);
  padding-left: 4px;
}
.sec-hero .hero-model-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
/* tiny progress ring: replaces the dot while the VRM streams (fill driven by
   --vrm-p, set on .hero-stage from the loader's real progress) */
.sec-hero .hero-model-ring {
  display: none;
  width: 12px; height: 12px;
  flex: none;
  transform: rotate(-90deg);
}
.sec-hero .hero-model-ring circle { fill: none; stroke-width: 2; }
.sec-hero .hero-model-ring-track { stroke: rgba(209, 254, 23, 0.18); }
.sec-hero .hero-model-ring-fill {
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-dasharray: 31.42;
  stroke-dashoffset: calc(31.42 * (1 - var(--vrm-p, 0)));
  transition: stroke-dashoffset 0.25s linear;
}
.sec-hero .hero-vrm-loading .hero-model-ring { display: block; }
.sec-hero .hero-vrm-loading .hero-model-dot { display: none; }
.sec-hero .hero-model-sep { opacity: 0.5; }
.sec-hero .hero-model-mcp {
  margin-left: auto;
  color: var(--text-faint);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-ui);
}
.sec-hero .hero-model-mcp:hover { color: var(--accent); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1100px) {
  .sec-hero .hero-hint { width: 216px; }
  .sec-hero .hero-chip { display: none; }
}

@media (max-width: 860px) {
  .sec-hero .hero-hint { display: none; }
  .sec-hero .hero-island-title span { display: none; }
}

@media (max-width: 760px) {
  .sec-hero .hero-stage { height: max(calc(100dvh - 56px), 480px); }
  .sec-hero .hero-billboard { top: 72px; gap: 6px; }
  .sec-hero .hero-bb-kicker { font-size: 15px; }
  .sec-hero .hero-bb-count { font-size: 12px; }
  .sec-hero .hero-island {
    top: 10px;
    gap: 10px;
    padding: 6px 6px 6px 12px;
    width: calc(100% - 20px);
    justify-content: space-between;
  }
  .sec-hero .hero-island-title { font-size: 12px; }
  .sec-hero .hero-island-nav .btn { padding: 7px 10px; font-size: 12px; }
  .sec-hero .hero-island-nav .btn-dark { display: none; }
  .sec-hero .hero-chat { bottom: 10px; width: calc(100% - 20px); }
  .sec-hero .hero-dialog-text { font-size: 13px; min-height: 38px; }
  .sec-hero .hero-model-line { display: none; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .sec-hero .hero-chip,
  .sec-hero .hero-island-dot { animation: none; }
  .sec-hero .hero-vrm,
  .sec-hero .hero-fallback,
  .sec-hero .hero-billboard,
  .sec-hero .hero-hint { transition: none; }
  .sec-hero .hero-scan::before,
  .sec-hero .hero-scan::after,
  .sec-hero .hero-vrm-ready .hero-vrm { animation: none; }
}