/* ==========================================================================
   MarineChat — deep-ocean, bioluminescent UI
   ========================================================================== */
:root {
  --abyss: #020814;
  --deep: #04142a;
  --mid: #072a4a;
  --ink: #e8f4ff;
  --ink-2: #a9c3dc;
  --ink-3: #6f8aa6;
  --cyan: #40ffd6;
  --cyan-2: #5cf2ff;
  --azure: #3aa0ff;
  --coral: #ff7a6b;
  --amber: #ffc86b;
  --violet: #9b8cff;
  --ok: #4dffa6;
  --bad: #ff6b8a;
  --glass: rgba(10, 34, 62, 0.42);
  --glass-2: rgba(14, 44, 78, 0.62);
  --line: rgba(120, 200, 255, 0.14);
  --line-2: rgba(120, 220, 255, 0.28);
  --glow: 0 0 0 1px rgba(64, 255, 214, .35), 0 8px 40px -8px rgba(64, 255, 214, .45);
  --r: 18px;
  --r-sm: 11px;
  --nav-h: 64px;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --spring: cubic-bezier(.34, 1.56, .64, 1);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --display: "Sora", "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --accent-rgb: 64, 255, 214;
  --accent2-rgb: 92, 242, 255;
  --sel-rgb: 255, 200, 107;
  --soft: rgba(255, 255, 255, .035);
  --soft-2: rgba(255, 255, 255, .06);
  --soft-3: rgba(255, 255, 255, .1);
  --field: rgba(0, 0, 0, .3);
  --scrim: rgba(0, 0, 0, .6);
  --panel-solid: rgba(5, 20, 40, .92);
  --panel-soft: rgba(4, 18, 36, .5);
  --panel-opaque: #06223a;
  --glass-bg: linear-gradient(160deg, rgba(20, 60, 100, .40), rgba(6, 22, 44, .55));
  --nav-grad: rgba(2, 8, 20, .75);
  --nav-solid: rgba(3, 12, 28, .72);
  --on-accent: #02131f;
  --ink-strong: #fff;
  --spot: rgba(120, 230, 255, .07);
  --spot-strong: rgba(120, 240, 255, .16);
  --title-hi: #c4f1ff;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; }
body {
  margin: 0; min-height: 100vh; font: 15px/1.6 var(--font); color: var(--ink);
  background: var(--abyss); overflow-x: hidden; -webkit-font-smoothing: antialiased;
}
body[data-route="explore"] { overflow: hidden; }
img { max-width: 100%; display: block; }
a { color: var(--cyan-2); text-decoration: none; }
a:hover { color: var(--ink-strong); }
button, input, select, textarea { font: inherit; color: inherit; }
svg { width: 1.15em; height: 1.15em; flex: none; }
.mono { font-family: var(--mono); }
.muted { color: var(--ink-3); }
.pad { padding: 18px; }
.row { display: flex; align-items: center; }
.gap { gap: 10px; }
.wrap { flex-wrap: wrap; }
.spacer { flex: 1; }
[hidden] { display: none !important; }
::selection { background: rgba(var(--accent-rgb), .35); }

/* ---------- animated backdrop */
#ocean, #snow { position: fixed; inset: 0; width: 100vw; height: 100vh; z-index: -2; display: block; }
#snow { z-index: -1; pointer-events: none; }

/* ---------- glass */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--line);
  backdrop-filter: blur(18px) saturate(1.3);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  border-radius: var(--r);
  box-shadow: 0 20px 60px -30px rgba(0, 0, 0, .8), inset 0 1px 0 var(--soft-2);
}

/* ---------- buttons */
.btn {
  --b: var(--line-2);
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 999px;
  border: 1px solid var(--b); background: var(--soft); cursor: pointer; font-weight: 600;
  color: var(--ink); transition: transform .25s var(--spring), box-shadow .3s var(--ease), background .3s, border-color .3s;
  white-space: nowrap; user-select: none;
}
.btn:hover { transform: translateY(-2px); background: var(--soft-2); color: var(--ink-strong); }
.btn:active { transform: translateY(0) scale(.97); }
.btn:disabled { opacity: .45; pointer-events: none; }
.btn-sm { padding: 6px 13px; font-size: 13px; }
.btn-lg { padding: 14px 26px; font-size: 16px; }
.btn-glow {
  border-color: transparent; color: var(--on-accent);
  background: linear-gradient(120deg, var(--cyan), var(--cyan-2) 50%, #8fd3ff);
  background-size: 200% 100%; box-shadow: var(--glow); animation: sheen 6s linear infinite;
}
.btn-glow:hover { color: var(--on-accent); box-shadow: 0 0 0 1px rgba(var(--accent-rgb), .6), 0 10px 50px -6px rgba(var(--accent-rgb), .7); background-color: transparent; }
.btn-ghost { background: rgba(var(--accent2-rgb), .05); }
@keyframes sheen { to { background-position: -200% 0; } }
.link { background: none; border: 0; color: var(--cyan-2); cursor: pointer; padding: 0; text-decoration: underline dotted; }

/* ---------- nav */
.nav {
  position: fixed; inset: 0 0 auto 0; height: var(--nav-h); z-index: 50; display: flex; align-items: center;
  gap: 28px; padding: 0 clamp(16px, 3vw, 36px);
  background: linear-gradient(180deg, var(--nav-grad), transparent);
  transition: background .4s;
}
.nav.solid { background: var(--nav-solid); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font: 600 19px var(--display); color: var(--ink); letter-spacing: -.01em; }
.brand b { font-weight: 800; background: linear-gradient(90deg, var(--cyan), var(--cyan-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand-mark { width: 34px; height: 34px; filter: drop-shadow(0 0 10px rgba(var(--accent-rgb), .55)); animation: bob 5s ease-in-out infinite; }
@keyframes bob { 50% { transform: translateY(-3px) rotate(-4deg); } }
.nav-links { display: flex; gap: 4px; }
.nav-links a { padding: 7px 14px; border-radius: 999px; color: var(--ink-2); font-weight: 500; transition: .25s; position: relative; }
.nav-links a:hover { color: var(--ink-strong); background: var(--soft-2); }
.nav-links a.on { color: var(--ink-strong); background: rgba(var(--accent-rgb), .10); box-shadow: inset 0 0 0 1px rgba(var(--accent-rgb), .25); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.gpu-pill { display: flex; align-items: center; gap: 8px; font: 500 12px var(--mono); color: var(--ink-2); padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--field); max-width: 260px; }
.gpu-pill span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ink-3); flex: none; }
.gpu-pill[data-s="ready"] .dot { background: var(--ok); box-shadow: 0 0 10px var(--ok); }
.gpu-pill[data-s="loading"] .dot { background: var(--amber); box-shadow: 0 0 10px var(--amber); animation: blink 1s infinite; }
.gpu-pill[data-s="error"] .dot { background: var(--bad); }
.gpu-pill[data-s="idle"] .dot { background: var(--cyan-2); }
@keyframes blink { 50% { opacity: .3; } }
.nav-burger { display: none; background: none; border: 0; width: 38px; height: 38px; cursor: pointer; position: relative; }
.nav-burger span { position: absolute; left: 9px; right: 9px; height: 2px; background: var(--ink); border-radius: 2px; transition: .3s var(--ease); }
.nav-burger span:first-child { top: 14px; } .nav-burger span:last-child { top: 22px; }
body.menu .nav-burger span:first-child { transform: translateY(4px) rotate(45deg); }
body.menu .nav-burger span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------- views + transitions */
.view { padding-top: var(--nav-h); animation: viewIn .6s var(--ease) both; }
@keyframes viewIn { from { opacity: 0; transform: translateY(14px); } }
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- home */
.zone { position: relative; }
.hero {
  min-height: calc(100vh - var(--nav-h)); display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(24px, 4vw, 64px);
  align-items: center; padding: 30px clamp(16px, 6vw, 96px) 80px;
}
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font: 600 12px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--cyan); margin: 0 0 18px; }
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 0 rgba(var(--accent-rgb), .7); animation: pulse 2.2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 12px rgba(var(--accent-rgb), 0); } 100% { box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0); } }
.hero-title { font: 800 clamp(44px, 7.2vw, 96px)/.98 var(--display); letter-spacing: -.035em; margin: 0 0 22px; }
.shimmer {
  background: linear-gradient(100deg, var(--cyan) 0%, var(--cyan-2) 30%, #c4f1ff 45%, var(--cyan-2) 60%, var(--violet) 100%);
  background-size: 250% 100%; -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shimmer 7s ease-in-out infinite; filter: drop-shadow(0 0 30px rgba(var(--accent-rgb), .25));
}
@keyframes shimmer { 50% { background-position: 100% 0; } }
.lead { font-size: clamp(16px, 1.35vw, 19px); color: var(--ink-2); max-width: 600px; margin: 0 0 30px; }
.lead b { color: var(--ink); }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
.stat-row { display: flex; gap: clamp(18px, 3vw, 44px); margin-top: 44px; }
.stat-row div { display: flex; flex-direction: column; }
.stat-row b { font: 700 30px var(--display); color: var(--ink-strong); font-variant-numeric: tabular-nums; }
.stat-row span { font-size: 12px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .08em; }

.hero-demo { perspective: 1200px; }
.demo-frame {
  position: relative; border-radius: 24px; overflow: hidden; transform: rotateY(-8deg) rotateX(4deg);
  box-shadow: 0 40px 120px -30px rgba(0, 180, 255, .45), 0 0 0 1px var(--line-2); transition: transform .8s var(--ease);
  aspect-ratio: 4/3; background: #031426;
}
.hero-demo:hover .demo-frame { transform: rotateY(0) rotateX(0); }
.demo-frame img { width: 100%; height: 100%; object-fit: cover; filter: saturate(1.1) contrast(1.05); }
.hero-svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-svg path { fill: rgba(var(--accent-rgb), .16); stroke: var(--cyan); stroke-width: 2; vector-effect: non-scaling-stroke; stroke-linejoin: round;
  stroke-dasharray: var(--len); stroke-dashoffset: var(--len); animation: draw 1.6s var(--ease) forwards; filter: drop-shadow(0 0 6px rgba(var(--accent-rgb), .8)); }
.hero-svg path.sel { fill: rgba(var(--sel-rgb), .22); stroke: var(--amber); filter: drop-shadow(0 0 10px rgba(var(--sel-rgb), .9)); }
@keyframes draw { to { stroke-dashoffset: 0; } }
.sonar { position: absolute; inset: 0; pointer-events: none; background: linear-gradient(90deg, transparent 0, rgba(var(--accent-rgb), .0) 40%, rgba(var(--accent-rgb), .28) 50%, transparent 51%); background-size: 200% 100%; animation: sweep 5s linear infinite; mix-blend-mode: screen; }
@keyframes sweep { from { background-position: 100% 0; } to { background-position: -100% 0; } }
.demo-caption { position: absolute; left: 16px; right: 16px; bottom: 16px; padding: 12px 14px; font-size: 14px; display: flex; gap: 10px; align-items: flex-start; min-height: 48px; border-radius: 14px; }
.demo-caption .tag { font: 600 11px var(--mono); color: var(--on-accent); background: var(--amber); border-radius: 6px; padding: 2px 6px; margin-top: 2px; }
.caret { display: inline-block; width: 8px; height: 16px; background: var(--cyan); margin-left: 2px; animation: blink .9s steps(1) infinite; vertical-align: -3px; }
.demo-legend { display: flex; gap: 18px; justify-content: center; margin-top: 16px; font-size: 12px; color: var(--ink-3); }
.demo-legend span { display: flex; align-items: center; gap: 6px; }
.sw { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.sw-pos { background: rgba(var(--accent-rgb), .3); border: 1.5px solid var(--cyan); }
.sw-sel { background: rgba(var(--sel-rgb), .3); border: 1.5px solid var(--amber); }
.scroll-cue { position: absolute; left: 50%; bottom: 22px; width: 26px; height: 42px; border: 2px solid var(--line-2); border-radius: 14px; transform: translateX(-50%); }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; margin-left: -2px; background: var(--cyan); border-radius: 2px; animation: cue 1.8s infinite; }
@keyframes cue { 60% { transform: translateY(14px); opacity: 0; } 61% { transform: none; opacity: 0; } }

.depth-gauge { position: fixed; right: clamp(10px, 1.6vw, 26px); top: 50%; transform: translateY(-50%); z-index: 20; display: flex; flex-direction: column; align-items: center; gap: 10px; pointer-events: none; }
.gauge-track { width: 3px; height: 34vh; border-radius: 3px; background: var(--soft-3); overflow: hidden; }
.gauge-fill { width: 100%; height: 0; background: linear-gradient(var(--cyan-2), var(--violet)); box-shadow: 0 0 12px var(--cyan); transition: height .2s linear; }
.gauge-read { font: 600 13px var(--mono); color: var(--ink); writing-mode: vertical-rl; transform: rotate(180deg); }
.gauge-zone { font: 500 10px var(--mono); text-transform: uppercase; letter-spacing: .14em; color: var(--cyan); writing-mode: vertical-rl; transform: rotate(180deg); }

.section { padding: clamp(70px, 10vw, 140px) clamp(16px, 6vw, 96px); }
.section-head { max-width: 760px; margin: 0 auto 50px; text-align: center; }
.section-head h2, .community h2 { font: 700 clamp(30px, 4vw, 52px)/1.08 var(--display); letter-spacing: -.025em; margin: 0 0 16px; }
.sub { color: var(--ink-2); font-size: 17px; margin: 0; }
.steps { list-style: none; padding: 0; margin: 0 auto; max-width: 1200px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: s; }
.step { padding: 26px 22px; position: relative; overflow: hidden; transition: transform .5s var(--ease), border-color .4s; }
.step:hover { transform: translateY(-6px); border-color: var(--line-2); }
.step::after { content: ""; position: absolute; inset: auto -40% -60% auto; width: 180px; height: 180px; border-radius: 50%; background: radial-gradient(circle, rgba(var(--accent-rgb), .16), transparent 70%); transition: .6s; }
.step:hover::after { transform: scale(1.5); }
.step:nth-child(2) { transition-delay: .08s; } .step:nth-child(3) { transition-delay: .16s; } .step:nth-child(4) { transition-delay: .24s; }
.step h3 { font: 600 18px var(--display); margin: 14px 0 8px; }
.step p { color: var(--ink-2); margin: 0; font-size: 14.5px; }
.step-ico { width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; background: linear-gradient(135deg, rgba(var(--accent-rgb), .18), rgba(58, 160, 255, .12)); color: var(--cyan); box-shadow: inset 0 0 0 1px rgba(var(--accent-rgb), .3); }
.step-ico svg { width: 24px; height: 24px; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; max-width: 1150px; margin: 0 auto; }
.audience { padding: 34px; }
.audience h3 { font: 700 26px/1.2 var(--display); margin: 14px 0 16px; letter-spacing: -.015em; }
.aud-badge { display: inline-block; font: 600 11px var(--mono); text-transform: uppercase; letter-spacing: .14em; padding: 5px 10px; border-radius: 999px; }
.aud-badge.learn { color: var(--cyan); background: rgba(var(--accent-rgb), .1); }
.aud-badge.research { color: var(--amber); background: rgba(var(--sel-rgb), .1); }
.ticks { list-style: none; padding: 0; margin: 0 0 24px; display: grid; gap: 10px; }
.ticks li { padding-left: 28px; position: relative; color: var(--ink-2); }
.ticks li::before { content: ""; position: absolute; left: 2px; top: 7px; width: 14px; height: 9px; border-left: 2px solid var(--cyan); border-bottom: 2px solid var(--cyan); transform: rotate(-45deg); }

.model-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px; max-width: 1200px; margin: 0 auto; }
.model-card { padding: 24px; position: relative; overflow: hidden; transition: transform .5s var(--ease), box-shadow .5s; }
.model-card:hover { transform: translateY(-6px) scale(1.01); box-shadow: 0 30px 80px -30px rgba(var(--accent-rgb), .4); }
.model-card .mc-badge { font: 600 10px var(--mono); text-transform: uppercase; letter-spacing: .14em; padding: 4px 8px; border-radius: 6px; }
.mc-badge.domain { color: var(--on-accent); background: var(--cyan); }
.mc-badge.general { color: var(--cyan-2); background: rgba(var(--accent2-rgb), .12); }
.mc-badge.flagship { color: #1b0f00; background: linear-gradient(90deg, var(--amber), var(--coral)); }
.model-card h3 { font: 700 22px var(--display); margin: 16px 0 2px; }
.model-card .tl { color: var(--cyan); font-size: 13px; font-weight: 600; margin-bottom: 10px; }
.model-card p { color: var(--ink-2); font-size: 14px; margin: 0 0 16px; }
.model-card .meta { display: flex; gap: 14px; font: 12px var(--mono); color: var(--ink-3); }
.model-card .vbar { height: 4px; border-radius: 4px; background: var(--soft-3); margin-top: 14px; overflow: hidden; }
.model-card .vbar i { display: block; height: 100%; background: linear-gradient(90deg, var(--cyan), var(--azure)); width: 0; transition: width 1.4s var(--ease); }
.model-card.in .vbar i { width: var(--w); }

.community { max-width: 1150px; margin: 0 auto; padding: clamp(28px, 4vw, 56px); display: grid; grid-template-columns: 1.4fr 1fr; gap: 30px; align-items: center; overflow: hidden; }
.bio-orb { position: relative; aspect-ratio: 1; max-width: 320px; width: 100%; justify-self: center; }
.bio-orb i { position: absolute; inset: 0; border-radius: 50%; border: 1px solid rgba(var(--accent-rgb), .35); animation: orb 6s ease-in-out infinite; box-shadow: 0 0 60px rgba(var(--accent-rgb), .2) inset; }
.bio-orb i:nth-child(2) { inset: 15%; animation-delay: -2s; border-color: rgba(155, 140, 255, .4); }
.bio-orb i:nth-child(3) { inset: 32%; animation-delay: -4s; background: radial-gradient(circle, rgba(var(--accent-rgb), .5), transparent 70%); }
@keyframes orb { 50% { transform: scale(1.08); opacity: .6; } }
.footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 40px clamp(16px, 6vw, 96px) 50px; color: var(--ink-3); font-size: 13px; border-top: 1px solid var(--line); }
.foot-links { display: flex; gap: 18px; }

/* ---------- explore app */
.app { height: 100vh; height: 100dvh; display: flex; flex-direction: column; padding: calc(var(--nav-h) + 4px) 14px 14px; gap: 12px; }
.app-bar { display: flex; align-items: center; gap: 12px; padding: 8px; border-radius: 16px; position: relative; z-index: 30; }
.app-bar-spacer { flex: 1; }
.seg-switch { position: relative; display: flex; background: var(--field); border-radius: 12px; padding: 4px; }
.seg-switch button { position: relative; z-index: 1; display: flex; align-items: center; gap: 7px; background: none; border: 0; padding: 7px 16px; cursor: pointer; color: var(--ink-2); font-weight: 600; font-size: 14px; border-radius: 9px; transition: color .3s; }
.seg-switch button.on { color: var(--on-accent); }
.seg-thumb { position: absolute; top: 4px; bottom: 4px; left: 4px; width: 0; border-radius: 9px; background: linear-gradient(120deg, var(--cyan), var(--cyan-2)); box-shadow: var(--glow); transition: left .45s var(--spring), width .45s var(--spring), background .4s; }
body[data-mode="research"] .seg-thumb { background: linear-gradient(120deg, var(--amber), #ffd99a); box-shadow: 0 0 0 1px rgba(var(--sel-rgb), .4), 0 8px 30px -8px rgba(var(--sel-rgb), .6); }
body:not([data-mode="research"]) .research-only { display: none !important; }

.model-picker { position: relative; }
.mp-btn { display: flex; align-items: center; gap: 10px; padding: 8px 14px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--field); cursor: pointer; font-weight: 600; transition: .25s; }
.mp-btn:hover { border-color: var(--cyan); }
.mp-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--ink-3); }
.mp-dot[data-s="ready"] { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.mp-dot[data-s="loading"] { background: var(--amber); animation: blink 1s infinite; }
.chev { transition: transform .3s; }
.model-picker.open .chev { transform: rotate(180deg); }
.mp-menu { position: absolute; top: calc(100% + 8px); left: 0; width: min(380px, 86vw); padding: 8px; display: grid; gap: 4px; opacity: 0; transform: translateY(-8px) scale(.98); pointer-events: none; transition: .3s var(--ease); transform-origin: top left; background: var(--panel-solid); }
.model-picker.open .mp-menu { opacity: 1; transform: none; pointer-events: auto; }
.mp-item { display: grid; grid-template-columns: 1fr auto; gap: 2px 10px; text-align: left; padding: 10px 12px; border-radius: 12px; border: 1px solid transparent; background: none; cursor: pointer; transition: .2s; }
.mp-item:hover { background: var(--soft-2); }
.mp-item.on { border-color: rgba(var(--accent-rgb), .4); background: rgba(var(--accent-rgb), .07); }
.mp-item b { font: 600 15px var(--display); }
.mp-item small { color: var(--ink-3); grid-column: 1 / -1; font-size: 12.5px; line-height: 1.4; }
.mp-item .mc-badge { align-self: center; }
.mp-item .live { font: 11px var(--mono); color: var(--ok); }

.workspace { flex: 1; min-height: 0; min-width: 0; display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(340px, 1fr); gap: 12px; }
.stage-wrap { min-height: 0; min-width: 0; display: flex; flex-direction: column; gap: 12px; }
.stage { position: relative; flex: 1; min-height: 260px; overflow: hidden; display: grid; place-items: center; }
.drop { position: absolute; inset: 0; display: grid; place-items: center; padding: 20px; transition: background .3s; overflow: auto; }
.drop.over { background: rgba(var(--accent-rgb), .06); box-shadow: inset 0 0 0 2px var(--cyan); border-radius: var(--r); }
.drop-inner { text-align: center; max-width: 640px; }
.drop-ico { width: 74px; height: 74px; margin: 0 auto 14px; border-radius: 22px; display: grid; place-items: center; color: var(--cyan); background: radial-gradient(circle at 30% 30%, rgba(var(--accent-rgb), .3), rgba(var(--accent-rgb), .05)); box-shadow: inset 0 0 0 1px rgba(var(--accent-rgb), .35), 0 0 50px rgba(var(--accent-rgb), .2); animation: bob 4s ease-in-out infinite; }
.drop-ico svg { width: 32px; height: 32px; }
.drop h3 { font: 700 22px var(--display); margin: 0 0 4px; }
.drop p { margin: 0; color: var(--ink-2); }
.drop .fine { font-size: 12px; color: var(--ink-3); margin-top: 6px; }
.gallery { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-top: 24px; }
.gallery button { padding: 0; border: 0; border-radius: 12px; overflow: hidden; cursor: pointer; aspect-ratio: 1; position: relative; background: #000; box-shadow: 0 0 0 1px var(--line); transition: transform .35s var(--spring), box-shadow .3s; }
.gallery button:hover { transform: translateY(-4px) scale(1.04); box-shadow: 0 0 0 2px var(--cyan), 0 12px 30px -10px rgba(var(--accent-rgb), .6); }
.gallery img { width: 100%; height: 100%; object-fit: cover; }
.canvas-wrap { position: absolute; inset: 0; display: grid; place-items: center; }
#stageCanvas { max-width: 100%; max-height: 100%; touch-action: none; cursor: crosshair; border-radius: 10px; }
body[data-tool="select"] #stageCanvas { cursor: pointer; }
.scan { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.scan-line { position: absolute; top: 0; bottom: 0; width: 30%; background: linear-gradient(90deg, transparent, rgba(var(--accent-rgb), .25) 80%, rgba(180, 255, 240, .9) 99%, transparent); animation: scanx 1.6s ease-in-out infinite alternate; mix-blend-mode: screen; }
@keyframes scanx { from { left: -30%; } to { left: 100%; } }
.scan-text { position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%); padding: 7px 14px; border-radius: 999px; background: var(--scrim); font-size: 12px; color: var(--cyan); white-space: nowrap; }
.hover-tip { position: absolute; pointer-events: none; padding: 7px 11px; font-size: 13px; border-radius: 10px; transform: translate(-50%, calc(-100% - 14px)); white-space: nowrap; max-width: 280px; overflow: hidden; text-overflow: ellipsis; background: var(--panel-solid); }
.hover-tip b { color: var(--cyan); }

.stage-tools { position: absolute; left: 50%; top: 12px; transform: translateX(-50%); display: flex; align-items: center; gap: 4px; padding: 5px; border-radius: 14px; z-index: 5; background: var(--panel-solid); }
.tool { display: flex; align-items: center; gap: 6px; padding: 7px 9px; border: 0; border-radius: 10px; background: none; cursor: pointer; color: var(--ink-2); transition: .2s; font-weight: 600; font-size: 13px; }
.tool:hover { background: var(--soft-2); color: var(--ink-strong); }
.tool.on, .tool[aria-pressed="true"] { color: var(--cyan); background: rgba(var(--accent-rgb), .12); }
#toolSegment { color: var(--on-accent); background: linear-gradient(120deg, var(--cyan), var(--cyan-2)); padding: 7px 12px; }
#toolSegment:disabled { opacity: .5; }
.tool-sep { width: 1px; height: 22px; background: var(--line-2); margin: 0 4px; }
.tool-slider { display: flex; align-items: center; padding: 0 6px; }
input[type=range] { -webkit-appearance: none; appearance: none; height: 4px; border-radius: 4px; background: var(--soft-3); outline: none; width: 90px; accent-color: var(--cyan); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 14px; height: 14px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); cursor: pointer; }
input[type=range]::-moz-range-thumb { width: 14px; height: 14px; border: 0; border-radius: 50%; background: var(--cyan); }
.params { position: absolute; top: 64px; right: 14px; z-index: 6; padding: 14px; display: grid; gap: 12px; width: 230px; background: var(--panel-solid); animation: pop .3s var(--spring); }
.params label { display: grid; gap: 6px; font-size: 13px; color: var(--ink-2); }
.params input[type=range] { width: 100%; }
@keyframes pop { from { opacity: 0; transform: translateY(-6px) scale(.97); } }
.add-bar { position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%); display: flex; align-items: center; gap: 8px; padding: 8px 8px 8px 14px; z-index: 5; font-size: 13px; background: var(--panel-solid); animation: pop .3s var(--spring); white-space: nowrap; }

.strip { padding: 10px 12px; border-radius: var(--r); background: var(--panel-soft); border: 1px solid var(--line); }
.strip-head { display: flex; align-items: center; gap: 8px; font-size: 13px; margin-bottom: 8px; }
.chips { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; scrollbar-width: thin; }
.chip { flex: none; display: flex; align-items: center; gap: 8px; padding: 4px 10px 4px 4px; border-radius: 12px; border: 1px solid var(--line); background: var(--soft); cursor: pointer; transition: .25s var(--ease); font-size: 13px; max-width: 220px; animation: chipIn .5s var(--spring) both; }
@keyframes chipIn { from { opacity: 0; transform: translateY(8px) scale(.9); } }
.chip:hover { border-color: var(--line-2); transform: translateY(-2px); }
.chip.sel { border-color: var(--amber); background: rgba(var(--sel-rgb), .1); box-shadow: 0 0 20px -6px rgba(var(--sel-rgb), .6); }
.chip canvas { width: 34px; height: 34px; border-radius: 8px; background: #000; }
.chip .nm { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chip .v { width: 16px; height: 16px; border-radius: 50%; display: grid; place-items: center; font-size: 10px; flex: none; }
.chip .v.ok { background: var(--ok); color: var(--on-accent); } .chip .v.bad { background: var(--bad); color: var(--ink-strong); }

/* ---------- side panel */
.panel { min-height: 0; display: flex; flex-direction: column; overflow: hidden; }
.tabs { position: relative; display: flex; gap: 2px; padding: 8px 8px 0; border-bottom: 1px solid var(--line); }
.tab { background: none; border: 0; padding: 9px 14px 11px; cursor: pointer; color: var(--ink-3); font-weight: 600; font-size: 14px; display: flex; align-items: center; gap: 6px; transition: color .25s; }
.tab.on { color: var(--ink); }
.tab-ink { position: absolute; bottom: -1px; height: 2px; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); transition: left .4s var(--spring), width .4s var(--spring); }
.badge { font: 600 10.5px var(--mono); padding: 1px 6px; border-radius: 999px; background: var(--soft-3); color: var(--ink-2); }
.tabpane { display: none; flex: 1; min-height: 0; flex-direction: column; }
.tabpane.on { display: flex; animation: viewIn .35s var(--ease); }
.ctx { display: flex; align-items: center; gap: 8px; padding: 10px 16px; font-size: 13px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.ctx-chip { padding: 2px 10px; border-radius: 999px; background: rgba(var(--accent-rgb), .1); color: var(--cyan); font-weight: 600; }
.ctx-chip.inst { background: rgba(var(--sel-rgb), .12); color: var(--amber); }
.messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 14px; scroll-behavior: smooth; }
.empty-chat { margin: auto; text-align: center; color: var(--ink-3); }
.bubble-art { position: relative; width: 80px; height: 80px; margin: 0 auto 10px; }
.bubble-art i { position: absolute; border-radius: 50%; border: 1.5px solid rgba(var(--accent2-rgb), .5); animation: rise 4s ease-in infinite; bottom: 0; }
.bubble-art i:nth-child(1) { width: 22px; height: 22px; left: 10px; }
.bubble-art i:nth-child(2) { width: 14px; height: 14px; left: 44px; animation-delay: -1.3s; }
.bubble-art i:nth-child(3) { width: 30px; height: 30px; left: 30px; animation-delay: -2.6s; }
@keyframes rise { 0% { transform: translateY(0); opacity: 0; } 20% { opacity: 1; } 100% { transform: translateY(-70px) scale(1.2); opacity: 0; } }
.msg { max-width: 92%; animation: msgIn .45s var(--spring) both; }
@keyframes msgIn { from { opacity: 0; transform: translateY(10px) scale(.97); } }
.msg.user { align-self: flex-end; background: linear-gradient(135deg, rgba(var(--accent-rgb), .22), rgba(58, 160, 255, .18)); border: 1px solid rgba(var(--accent-rgb), .3); padding: 10px 14px; border-radius: 16px 16px 4px 16px; }
.msg.bot { align-self: flex-start; }
.msg.bot .body { background: var(--soft); border: 1px solid var(--line); padding: 12px 15px; border-radius: 4px 16px 16px 16px; }
.msg .who { display: flex; align-items: center; gap: 8px; font: 600 11px var(--mono); color: var(--ink-3); margin: 0 0 5px 2px; text-transform: uppercase; letter-spacing: .08em; }
.msg .who .m { color: var(--cyan); }
.msg .body p { margin: 0 0 .6em; } .msg .body p:last-child { margin-bottom: 0; }
.msg .body ul, .msg .body ol { margin: .2em 0 .6em; padding-left: 1.3em; }
.msg .body code { font-family: var(--mono); font-size: .9em; background: var(--field); padding: 1px 5px; border-radius: 5px; }
.msg .body strong { color: var(--ink-strong); }
.msg .body hr { border: 0; height: 1px; background: var(--line-2); margin: .8em 0; }
.msg .body h4 { font: 600 15px var(--display); margin: .6em 0 .3em; }
.msg .err { color: var(--bad); }
.msg-actions { display: flex; gap: 4px; margin-top: 6px; opacity: .6; transition: opacity .2s; }
.msg:hover .msg-actions { opacity: 1; }
.ib { display: inline-flex; align-items: center; gap: 5px; padding: 4px 8px; border-radius: 8px; border: 0; background: none; color: var(--ink-3); cursor: pointer; font-size: 12px; transition: .2s; }
.ib:hover { color: var(--ink-strong); background: var(--soft-2); }
.ib.on-ok { color: var(--ok); } .ib.on-bad { color: var(--bad); }
.ib.flip svg { transform: rotate(180deg); }
.thinking { display: inline-flex; gap: 5px; padding: 4px 0; }
.thinking i { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); animation: think 1.2s infinite ease-in-out; }
.thinking i:nth-child(2) { animation-delay: .15s; } .thinking i:nth-child(3) { animation-delay: .3s; }
@keyframes think { 40% { transform: translateY(-6px); opacity: 1; } 0%, 80%, 100% { opacity: .35; } }
.loading-note { font-size: 12px; color: var(--amber); margin-top: 6px; font-family: var(--mono); }
.suggests { display: flex; gap: 6px; padding: 0 14px 10px; flex-wrap: wrap; }
.sugg { padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line-2); background: var(--soft); font-size: 12.5px; cursor: pointer; color: var(--ink-2); transition: .25s var(--spring); animation: chipIn .4s var(--spring) both; }
.sugg:hover { color: var(--on-accent); background: var(--cyan); border-color: var(--cyan); transform: translateY(-2px); }
.sugg.quiz { border-color: rgba(155, 140, 255, .5); color: #cfc8ff; }
.composer { display: flex; align-items: flex-end; gap: 8px; margin: 0 12px; padding: 8px 8px 8px 14px; border-radius: 16px; border: 1px solid var(--line-2); background: var(--field); transition: border-color .3s, box-shadow .3s; }
.composer:focus-within { border-color: var(--cyan); box-shadow: 0 0 0 4px rgba(var(--accent-rgb), .1); }
.composer textarea { flex: 1; resize: none; border: 0; background: none; outline: none; max-height: 140px; padding: 6px 0; line-height: 1.45; }
.send { width: 38px; height: 38px; border-radius: 12px; border: 0; cursor: pointer; display: grid; place-items: center; color: var(--on-accent); background: linear-gradient(135deg, var(--cyan), var(--cyan-2)); transition: transform .25s var(--spring), opacity .2s; }
.send:hover { transform: scale(1.08) rotate(-8deg); }
.send:disabled { opacity: .4; transform: none; }
.send .ico-stop { display: none; }
.send.stop { position: relative; color: var(--ink-strong); background: linear-gradient(135deg, var(--coral), #ff5f8f); }
.send.stop .ico-send { display: none; } .send.stop .ico-stop { display: block; }
.send.stop::after { content: ""; position: absolute; inset: -4px; border-radius: 15px; border: 2px solid rgba(255, 122, 107, .55); animation: stopRing 1.4s ease-out infinite; pointer-events: none; }
.send.stop:hover { transform: scale(1.08); }
@keyframes stopRing { from { transform: scale(.92); opacity: 1; } to { transform: scale(1.18); opacity: 0; } }
.stopped-note { display: inline-flex; align-items: center; gap: 5px; margin-top: 8px; font: 600 11px var(--mono); color: var(--coral); text-transform: uppercase; letter-spacing: .06em; }
.stopped-note svg { width: 10px; height: 10px; }
.ib.stop-ib { color: var(--coral); padding: 1px 6px; margin-left: auto; font-size: 11px; }
.ib.stop-ib svg { width: 9px; height: 9px; }
.disclaimer { font-size: 11px; color: var(--ink-3); padding: 8px 16px 12px; margin: 0; text-align: center; }

.inst-list { flex: 1; overflow-y: auto; padding: 12px; display: grid; gap: 10px; align-content: start; }
.icard { border: 1px solid var(--line); border-radius: 14px; padding: 10px; background: var(--soft); display: grid; grid-template-columns: 64px 1fr; gap: 10px 12px; transition: border-color .25s, background .25s; animation: chipIn .4s var(--spring) both; }
.icard.sel { border-color: var(--amber); background: rgba(var(--sel-rgb), .06); }
.icard canvas { width: 64px; height: 64px; border-radius: 10px; background: #000; cursor: pointer; }
.icard .ih { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.icard .ih b { font: 600 14px var(--display); }
.icard .scores { font: 11px var(--mono); color: var(--ink-3); display: flex; gap: 10px; flex-wrap: wrap; }
.origin { font: 600 10px var(--mono); padding: 1px 6px; border-radius: 5px; background: var(--soft-3); color: var(--ink-2); text-transform: uppercase; }
.origin.user { background: rgba(155, 140, 255, .2); color: #cfc8ff; }
.origin.neg { background: rgba(255, 107, 138, .15); color: var(--bad); }
.icard .cap { grid-column: 1 / -1; font-size: 13.5px; color: var(--ink-2); }
.cap-item { border-left: 2px solid var(--cyan); padding: 4px 0 4px 10px; margin-top: 6px; }
.cap-item .cm { font: 600 10.5px var(--mono); color: var(--cyan); text-transform: uppercase; letter-spacing: .06em; display: flex; align-items: center; gap: 6px; }
.cap-item.mg { border-color: var(--violet); } .cap-item.mg .cm { color: var(--violet); }
.icard .acts { grid-column: 1 / -1; display: flex; gap: 4px; flex-wrap: wrap; }
.fix { grid-column: 1 / -1; display: grid; gap: 8px; padding: 10px; border-radius: 10px; background: var(--field); animation: pop .3s var(--spring); }

.review { padding: 16px; overflow-y: auto; display: grid; gap: 14px; align-content: start; }
.review-sum { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.review-sum div { padding: 12px; border-radius: 12px; background: var(--soft); border: 1px solid var(--line); text-align: center; }
.review-sum b { display: block; font: 700 22px var(--display); }
.review-sum span { font-size: 11px; color: var(--ink-3); text-transform: uppercase; letter-spacing: .06em; }

/* ---------- forms */
.field { display: grid; gap: 5px; font-size: 13px; color: var(--ink-2); }
.field input, .field select, .field textarea, .fix input, .fix textarea, .fix select {
  width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line-2); background: var(--field); color: var(--ink); outline: none; transition: border-color .2s, box-shadow .2s; resize: vertical;
}
.field input:focus, .field select:focus, .field textarea:focus, .fix input:focus, .fix textarea:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .12); }
.field select option { background: var(--panel-opaque); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.span2 { grid-column: 1 / -1; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 13.5px; color: var(--ink-2); cursor: pointer; }
.check.mini { font-size: 12px; align-items: center; gap: 6px; }
.check.mini input { margin-top: 0; width: 14px; height: 14px; }
.check input { margin-top: 3px; accent-color: var(--cyan); width: 16px; height: 16px; flex: none; }
.contrib-details summary { cursor: pointer; color: var(--cyan-2); font-size: 13.5px; margin-bottom: 10px; }

/* ---------- pages */
.page { min-height: 100vh; }
.page-inner { max-width: 1050px; margin: 0 auto; padding: 50px clamp(16px, 4vw, 40px) 90px; }
.contrib { padding: clamp(18px, 3vw, 34px); display: grid; gap: 18px; }
.cdrop { border: 2px dashed var(--line-2); border-radius: 16px; padding: 26px; cursor: pointer; transition: .3s; text-align: center; }
.cdrop:hover, .cdrop.over { border-color: var(--cyan); background: rgba(var(--accent-rgb), .05); }
.cdrop-inner { display: flex; flex-direction: column; align-items: center; gap: 4px; color: var(--ink-2); }
.cdrop-inner svg { width: 34px; height: 34px; color: var(--cyan); margin-bottom: 6px; }
.cdrop-inner b { color: var(--ink); font-size: 16px; }
.cthumbs { display: grid; grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); gap: 8px; margin-top: 14px; }
.cthumbs:empty { display: none; }
.cthumbs div { position: relative; aspect-ratio: 1; border-radius: 10px; overflow: hidden; animation: chipIn .4s var(--spring) both; }
.cthumbs img { width: 100%; height: 100%; object-fit: cover; }
.cthumbs button { position: absolute; top: 4px; right: 4px; width: 22px; height: 22px; border-radius: 50%; border: 0; background: var(--scrim); color: var(--ink-strong); cursor: pointer; display: grid; place-items: center; padding: 0; }
.progress { flex: 1; height: 6px; border-radius: 6px; background: var(--soft-3); overflow: hidden; min-width: 120px; }
.progress i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--cyan), var(--azure)); transition: width .2s; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.about-grid article { padding: 26px; }
.about-grid h3 { font: 700 20px var(--display); margin: 0 0 12px; }
.about-grid p { color: var(--ink-2); }
.cite { white-space: pre-wrap; font-size: 12.5px; background: var(--field); padding: 16px; border-radius: 12px; border: 1px solid var(--line); color: var(--ink-2); overflow-x: auto; }

/* ---------- toasts */
.toasts { position: fixed; right: 16px; bottom: 16px; z-index: 100; display: grid; gap: 8px; max-width: min(380px, calc(100vw - 32px)); }
.toast { padding: 12px 16px; border-radius: 14px; background: var(--panel-solid); border: 1px solid var(--line-2); box-shadow: 0 20px 50px -20px #000; font-size: 14px; animation: toastIn .5s var(--spring) both; display: flex; gap: 10px; align-items: flex-start; }
.toast.ok { border-color: rgba(77, 255, 166, .5); } .toast.err { border-color: rgba(255, 107, 138, .6); }
.toast.out { animation: toastOut .35s var(--ease) forwards; }
@keyframes toastIn { from { opacity: 0; transform: translateX(40px) scale(.95); } }
@keyframes toastOut { to { opacity: 0; transform: translateX(40px); } }
.burst { position: fixed; pointer-events: none; z-index: 120; width: 10px; height: 10px; border-radius: 50%; border: 1.5px solid var(--cyan); animation: burst 1.2s var(--ease) forwards; }
@keyframes burst { to { transform: translate(var(--dx), var(--dy)) scale(var(--s)); opacity: 0; } }

/* ---------- responsive */
@media (max-width: 1100px) {
  .steps { grid-template-columns: 1fr 1fr; }
  .workspace { grid-template-columns: 1fr; grid-template-rows: minmax(300px, 52vh) auto; overflow-y: auto; }
  body[data-route="explore"] { overflow: auto; }
  .app { height: auto; min-height: 100dvh; }
  .panel { min-height: 70vh; }
}
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; padding-top: 20px; text-align: left; }
  .hero-demo { order: -1; }
  .demo-frame { transform: none; }
  .split, .community, .about-grid { grid-template-columns: 1fr; }
  .bio-orb { max-width: 200px; }
  .depth-gauge { display: none; }
  .nav-links { position: fixed; top: var(--nav-h); left: 12px; right: 12px; flex-direction: column; padding: 10px; border-radius: 16px; background: var(--panel-solid); border: 1px solid var(--line); transform: translateY(-10px); opacity: 0; pointer-events: none; transition: .3s var(--ease); }
  body.menu .nav-links { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 12px 14px; }
  .nav-burger { display: block; }
  .hide-sm { display: none !important; }
  .gpu-pill { max-width: 140px; }
  .gallery { grid-template-columns: repeat(3, 1fr); }
  .stage-tools { top: auto; bottom: 10px; max-width: calc(100% - 20px); overflow-x: auto; }
  .add-bar { bottom: 64px; white-space: normal; flex-wrap: wrap; justify-content: center; width: calc(100% - 20px); }
  .tool-slider { display: none; }
}
@media (max-width: 560px) {
  .steps, .grid2 { grid-template-columns: 1fr; }
  .nav { gap: 10px; }
  .gpu-pill { padding: 8px; } .gpu-pill span { display: none; }
  .brand { font-size: 17px; } .brand-mark { width: 28px; height: 28px; }
  .app-bar { flex-wrap: wrap; gap: 8px; }
  .model-picker { flex: 1; min-width: 0; } .mp-btn { width: 100%; }
  .mp-menu { width: calc(100vw - 32px); }
  .app-bar-spacer { display: none; }
  .stage-tools { gap: 2px; } .tool { padding: 7px; } #toolSegment span { display: none; }
  .hero-title { font-size: 44px; }
  .demo-caption { font-size: 12.5px; left: 10px; right: 10px; bottom: 10px; }
  .review-sum { grid-template-columns: repeat(3, 1fr); }
  #segTime { display: none; }
  .strip-head { flex-wrap: wrap; }
  .scan-text { bottom: auto; top: 12px; }
  .stat-row b { font-size: 24px; }
  .app { padding-left: 8px; padding-right: 8px; }
  .seg-switch button { padding: 7px 11px; }
  .mp-btn .mp-name { max-width: 110px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001s !important; animation-iteration-count: 1 !important; transition-duration: .001s !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ==========================================================================
   Themes: dark (default, above) · light · ocean
   ========================================================================== */
:root[data-theme="light"] {
  --abyss: #eef4f9; --deep: #ffffff; --mid: #dfeaf3;
  --ink: #0d2238; --ink-2: #3b5570; --ink-3: #566d84;
  --cyan: #0a9f8c; --cyan-2: #0b7fc0; --azure: #2563eb; --coral: #e5533f; --amber: #c27c0e; --violet: #6d5ae6;
  --ok: #11995b; --bad: #d4335a;
  --accent-rgb: 10, 159, 140; --accent2-rgb: 11, 127, 192; --sel-rgb: 214, 140, 20;
  --line: rgba(20, 60, 110, .12); --line-2: rgba(20, 70, 130, .22);
  --soft: rgba(10, 40, 80, .035); --soft-2: rgba(10, 40, 80, .06); --soft-3: rgba(10, 40, 80, .1);
  --field: rgba(255, 255, 255, .92); --scrim: rgba(10, 30, 60, .55);
  --panel-solid: rgba(255, 255, 255, .97); --panel-soft: rgba(255, 255, 255, .72); --panel-opaque: #ffffff;
  --glass-bg: linear-gradient(160deg, rgba(255, 255, 255, .8), rgba(240, 248, 253, .7));
  --nav-grad: rgba(238, 244, 249, .92); --nav-solid: rgba(255, 255, 255, .88);
  --on-accent: #ffffff; --ink-strong: #04121f;
  --spot: rgba(11, 127, 192, .05); --spot-strong: rgba(11, 127, 192, .1);
  --glow: 0 0 0 1px rgba(10, 159, 140, .3), 0 8px 30px -12px rgba(10, 159, 140, .5);
  --title-hi: #4fd1c5;
  color-scheme: light;
}
:root[data-theme="ocean"] {
  --abyss: #3fb2ea; --deep: #e9f9ff; --mid: #bfeeff;
  --ink: #062a46; --ink-2: #1c4b70; --ink-3: #3f6e92;
  --cyan: #0096b4; --cyan-2: #0070cc; --azure: #0058c9; --coral: #ff5a4a; --amber: #e07800; --violet: #5a48e0;
  --ok: #068a4e; --bad: #d81e4f;
  --accent-rgb: 0, 150, 180; --accent2-rgb: 0, 112, 204; --sel-rgb: 230, 120, 0;
  --line: rgba(0, 70, 130, .16); --line-2: rgba(0, 90, 160, .3);
  --soft: rgba(0, 60, 120, .04); --soft-2: rgba(0, 60, 120, .07); --soft-3: rgba(0, 60, 120, .12);
  --field: rgba(255, 255, 255, .85); --scrim: rgba(0, 40, 80, .5);
  --panel-solid: rgba(240, 251, 255, .96); --panel-soft: rgba(255, 255, 255, .6); --panel-opaque: #eafaff;
  --glass-bg: linear-gradient(160deg, rgba(255, 255, 255, .74), rgba(222, 246, 255, .6));
  --nav-grad: rgba(255, 255, 255, .45); --nav-solid: rgba(235, 250, 255, .86);
  --on-accent: #ffffff; --ink-strong: #021c30;
  --spot: rgba(255, 255, 255, .35); --spot-strong: rgba(255, 255, 255, .55);
  --glow: 0 0 0 1px rgba(0, 150, 180, .35), 0 10px 34px -10px rgba(0, 112, 204, .55);
  --title-hi: #ffffff;
  color-scheme: light;
}
:root[data-theme="light"] .btn-glow, :root[data-theme="ocean"] .btn-glow { background: linear-gradient(120deg, var(--cyan), var(--cyan-2) 60%, var(--azure)); background-size: 200% 100%; }
:root[data-theme="light"] .shimmer { background-image: linear-gradient(100deg, var(--cyan) 0%, var(--cyan-2) 35%, var(--title-hi) 48%, var(--cyan-2) 60%, var(--violet) 100%); filter: none; }
:root[data-theme="ocean"] .shimmer { background-image: linear-gradient(100deg, #ffffff 0%, #fff7c2 30%, #ffffff 50%, #b8f3ff 70%, #ffffff 100%); filter: drop-shadow(0 2px 14px rgba(0, 60, 120, .35)); }
:root[data-theme="ocean"] .hero-title, :root[data-theme="ocean"] .section-head h2 { color: #fff; text-shadow: 0 2px 18px rgba(0, 50, 100, .35); }
:root[data-theme="ocean"] .lead, :root[data-theme="ocean"] .section-head .sub, :root[data-theme="ocean"] .stat-row span { color: #eaf9ff; text-shadow: 0 1px 8px rgba(0, 50, 100, .35); }
:root[data-theme="ocean"] .lead b, :root[data-theme="ocean"] .stat-row b { color: #fff; }
:root[data-theme="ocean"] .eyebrow { color: #fff7c2; }
:root[data-theme="ocean"] .gauge-read, :root[data-theme="ocean"] .gauge-zone, :root[data-theme="ocean"] .footer { color: #eaf9ff; }
:root[data-theme="ocean"] .brand, :root[data-theme="ocean"] .nav-links a { color: #04304f; }
:root[data-theme="light"] .demo-frame, :root[data-theme="ocean"] .demo-frame { box-shadow: 0 30px 80px -30px rgba(0, 60, 120, .45), 0 0 0 1px var(--line-2); }
:root[data-theme="light"] .brand-mark, :root[data-theme="ocean"] .brand-mark { filter: drop-shadow(0 0 6px rgba(0, 120, 180, .35)); }
.send.stop, .cthumbs button, .chip .v.bad { color: #fff; }
body { transition: background-color .5s var(--ease), color .5s var(--ease); }
.glass, .btn, .tab, .chip, .icard { transition-property: transform, box-shadow, background, border-color, color; }

/* ---------- theme switch */
.theme-switch { position: relative; display: flex; padding: 3px; border-radius: 999px; background: var(--field); border: 1px solid var(--line); }
.theme-switch button { position: relative; z-index: 1; width: 30px; height: 26px; border: 0; background: none; cursor: pointer; color: var(--ink-3); display: grid; place-items: center; border-radius: 999px; transition: color .3s; }
.theme-switch button[aria-checked="true"] { color: var(--on-accent); }
.theme-switch button:hover { color: var(--ink); }
.theme-switch button[aria-checked="true"]:hover { color: var(--on-accent); }
.theme-switch svg { width: 15px; height: 15px; }
.ts-thumb { position: absolute; top: 3px; bottom: 3px; left: 3px; width: 30px; border-radius: 999px; background: linear-gradient(120deg, var(--cyan), var(--cyan-2)); box-shadow: var(--glow); transition: left .45s var(--spring), width .45s var(--spring); }

/* ---------- hover spotlight (follows the pointer inside cards, buttons, chips) */
.glass { background-image: radial-gradient(200px circle at var(--mx, -999px) var(--my, -999px), var(--spot), transparent 70%), var(--glass-bg); }
.btn-ghost:hover, .chip:hover, .icard:hover, .sim:hover, .vid:hover, .fact-chip:hover, .tool:hover, .sugg:hover, .mp-item:hover, .tab:hover, .ib:hover, .sp-sec-head:hover, .gallery button:hover {
  background-image: radial-gradient(80px circle at var(--mx, 50%) var(--my, 50%), var(--spot-strong), transparent 75%);
}
.icard, .sim, .vid, .fact-chip { transition: transform .35s var(--spring), border-color .3s, box-shadow .3s, background .3s; }
.icard:hover, .sim:hover { transform: translateY(-2px); border-color: var(--line-2); box-shadow: 0 10px 30px -18px rgba(var(--accent-rgb), .55); }
.ib { transition: color .2s, background .2s, transform .25s var(--spring); }
.ib:hover { transform: translateY(-1px); }
.ib:active { transform: scale(.92); }
.tab:hover { color: var(--ink); }
.ib.attn { color: var(--amber); animation: attn 1.6s ease-in-out infinite; }
@keyframes attn { 50% { box-shadow: 0 0 0 4px rgba(var(--sel-rgb), .18); } }

/* ---------- shared feedback bar */
.fb-wrap { display: grid; gap: 6px; }
.fb { display: flex; align-items: center; gap: 2px; flex-wrap: wrap; }
.fb .fb-q { font-size: 11.5px; color: var(--ink-3); margin-right: 4px; }
.fb.compact .ib { padding: 3px 6px; }
.fb .fb-more svg { transition: transform .3s var(--spring); }
.fb .fb-more.open svg { transform: rotate(180deg); }
.fb-box { display: grid; gap: 6px; padding: 8px; border-radius: 10px; background: var(--field); border: 1px solid var(--line); animation: pop .3s var(--spring); }
.fb-box textarea { width: 100%; resize: vertical; border: 1px solid var(--line-2); border-radius: 8px; background: transparent; padding: 7px 9px; outline: none; color: var(--ink); }
.fb-box textarea:focus { border-color: var(--cyan); }
.fb-box-actions { display: flex; justify-content: flex-end; gap: 6px; }
.btn-xs { padding: 4px 10px; font-size: 12px; }
.msg-actions { align-items: center; flex-wrap: wrap; }
.msg-actions .fb-wrap { flex: 1; }
.cap-item .fb-wrap { margin-top: 4px; }

/* ---------- workspace widening for the species explorer */
.workspace.wide { grid-template-columns: minmax(0, 1.05fr) minmax(400px, 1.15fr); }
.workspace { transition: grid-template-columns .5s var(--ease); }

/* ---------- species explorer */
.sp-bar { display: flex; align-items: center; gap: 6px; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.sp-searchbox { position: relative; flex: 1; }
.sp-searchbox input { width: 100%; padding: 8px 12px; border-radius: 10px; border: 1px solid var(--line-2); background: var(--field); outline: none; color: var(--ink); }
.sp-searchbox input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .12); }
.sp-suggest { position: absolute; top: calc(100% + 6px); left: 0; right: 0; z-index: 20; padding: 6px; display: grid; gap: 2px; background: var(--panel-solid); max-height: 340px; overflow-y: auto; }
.sugg-item { display: flex; gap: 10px; align-items: center; padding: 6px 8px; border: 0; border-radius: 9px; background: none; cursor: pointer; text-align: left; }
.sugg-item:hover { background: var(--soft-2); }
.sugg-item img, .sugg-item .noimg { width: 34px; height: 34px; border-radius: 8px; object-fit: cover; background: var(--soft-3); flex: none; }
.sugg-item small { color: var(--ink-3); }
.sp-body { flex: 1; min-height: 0; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.sp-body > * { flex: none; }
.sp-empty { text-align: center; color: var(--ink-2); padding: 30px 10px; }
.sp-empty.small { padding: 10px; }
.sp-head { display: grid; grid-template-columns: 110px 1fr; gap: 14px; align-items: start; animation: chipIn .5s var(--spring) both; }
.sp-hero { width: 110px; height: 110px; border-radius: 16px; object-fit: cover; cursor: zoom-in; box-shadow: 0 0 0 1px var(--line-2), 0 14px 30px -18px #000; transition: transform .4s var(--spring); }
.sp-hero:hover { transform: scale(1.04) rotate(-1deg); }
.sp-common { font: 700 20px/1.15 var(--display); letter-spacing: -.01em; }
.sp-sci { margin: 2px 0 6px; color: var(--ink-2); }
.sp-crumbs { display: flex; flex-wrap: wrap; gap: 3px; font-size: 11.5px; color: var(--ink-3); margin-bottom: 6px; }
.sp-crumbs .link { font-size: 11.5px; text-decoration: none; color: var(--ink-2); }
.sp-crumbs .link:hover { color: var(--cyan); }
.sp-crumbs .sep { opacity: .5; }
.sp-pills, .sp-links { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 6px; }
.pill { font: 600 10.5px var(--mono); padding: 2px 8px; border-radius: 999px; background: var(--soft-3); color: var(--ink-2); text-transform: uppercase; letter-spacing: .04em; }
.pill.ok { background: rgba(var(--accent-rgb), .14); color: var(--cyan); }
.pill.warn { background: rgba(var(--sel-rgb), .15); color: var(--amber); }
.sp-confirm { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; margin-top: 10px; padding: 9px 12px; border-radius: 12px; border: 1px dashed var(--line-2); background: var(--soft); font-size: 13.5px; }
.sp-sec { border: 1px solid var(--line); border-radius: 14px; background: var(--soft); overflow: hidden; animation: chipIn .45s var(--spring) both; }
.sp-sec-head { width: 100%; display: flex; align-items: center; gap: 8px; padding: 10px 12px; border: 0; background: none; cursor: pointer; font: 600 14px var(--display); color: var(--ink); text-align: left; }
.sp-sec-head > svg:first-child { color: var(--cyan); }
.sp-sec-head > svg:last-child { margin-left: auto; transition: transform .3s var(--spring); }
.sp-sec.folded .sp-sec-head > svg:last-child { transform: rotate(-90deg); }
.sp-sec.folded .sp-sec-body { display: none; }
.sp-sec-body { padding: 0 12px 12px; display: grid; gap: 8px; }
.sp-summary { margin: 0; color: var(--ink-2); font-size: 14px; }
.sp-summary.clamp { display: -webkit-box; -webkit-line-clamp: 5; -webkit-box-orient: vertical; overflow: hidden; }
.sp-src, .sp-more { font-size: 11.5px; color: var(--ink-3); }
.fine { font-size: 11.5px; color: var(--ink-3); margin: 0; }
.shimmer-line { height: 12px; border-radius: 6px; background: linear-gradient(90deg, var(--soft-2), var(--soft-3), var(--soft-2)); background-size: 200% 100%; animation: skel 1.2s linear infinite; }
.shimmer-line.short { width: 60%; }
@keyframes skel { to { background-position: -200% 0; } }
.sp-skel { display: grid; grid-template-columns: 110px 1fr; gap: 14px; }
.sk-hero { width: 110px; height: 110px; border-radius: 16px; background: linear-gradient(90deg, var(--soft-2), var(--soft-3), var(--soft-2)); background-size: 200% 100%; animation: skel 1.2s linear infinite; }
.sk-lines { display: grid; gap: 10px; align-content: center; }
.sp-skel p { grid-column: 1 / -1; }
.facts { display: grid; gap: 10px; }
.fact-group { display: grid; gap: 6px; }
.fact-cat { display: flex; align-items: center; gap: 6px; font: 600 11px var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); }
.fact-cat svg { width: 13px; height: 13px; color: var(--cyan); }
.fact-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.fact-chip { padding: 5px 11px; border-radius: 999px; border: 1px solid var(--line-2); background: var(--soft-2); cursor: pointer; font-size: 12.5px; color: var(--ink); animation: chipIn .4s var(--spring) both; }
.fact-chip:hover { transform: translateY(-2px); border-color: var(--cyan); }
.fact-chip.open { border-color: var(--cyan); background: rgba(var(--accent-rgb), .14); }
.fact-chip.v-correct { border-color: var(--ok); } .fact-chip.v-correct::after { content: " ✓"; color: var(--ok); }
.fact-chip.v-wrong { border-color: var(--bad); text-decoration: line-through; text-decoration-color: var(--bad); }
.fact-detail { padding: 10px; border-radius: 10px; background: var(--field); border: 1px solid var(--line); display: grid; gap: 6px; animation: pop .3s var(--spring); }
.fact-detail blockquote { margin: 0; font-size: 13px; color: var(--ink-2); font-style: italic; }
.vid-row { display: flex; gap: 10px; overflow-x: auto; padding-bottom: 6px; scroll-snap-type: x mandatory; scrollbar-width: thin; }
.vid { flex: none; width: 190px; display: grid; gap: 5px; scroll-snap-align: start; border-radius: 12px; padding: 6px; border: 1px solid transparent; }
.vid:hover { border-color: var(--line-2); }
.vid-thumb { position: relative; padding: 0; border: 0; border-radius: 10px; overflow: hidden; aspect-ratio: 16 / 9; background: #000; cursor: pointer; }
.vid-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease), filter .3s; }
.vid-thumb:hover img { transform: scale(1.06); filter: brightness(1.08); }
.vid-ph { width: 100%; height: 100%; background: linear-gradient(135deg, #0a3b5c, #04192c); }
.vid-thumb .play { position: absolute; inset: 0; margin: auto; width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; background: rgba(0, 0, 0, .45); color: #fff; backdrop-filter: blur(4px); transition: transform .3s var(--spring), background .3s; }
.vid-thumb:hover .play { transform: scale(1.15); background: rgba(var(--accent-rgb), .85); }
.vid-thumb .dur, .vid-thumb .prov { position: absolute; bottom: 5px; font: 600 10px var(--mono); padding: 1px 5px; border-radius: 4px; background: rgba(0, 0, 0, .65); color: #fff; }
.vid-thumb .dur { right: 5px; } .vid-thumb .prov { left: 5px; }
.vid-title { font-size: 12px; color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ph-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 6px; }
.ph { position: relative; border-radius: 10px; overflow: hidden; aspect-ratio: 1; background: var(--soft-3); }
.ph img { width: 100%; height: 100%; object-fit: cover; cursor: zoom-in; transition: transform .5s var(--ease); }
.ph:hover img { transform: scale(1.07); }
.ph .ph-fb { position: absolute; left: 4px; right: 4px; bottom: 4px; opacity: 0; transform: translateY(4px); transition: .25s var(--ease); background: var(--panel-solid); border-radius: 8px; }
.ph:hover .ph-fb, .ph:focus-within .ph-fb { opacity: 1; transform: none; }
.ph.v-wrong img { filter: grayscale(.8) brightness(.7); }
.ph.v-correct { box-shadow: inset 0 0 0 2px var(--ok); }
.comm-tag { position: absolute; top: 4px; left: 4px; font: 600 9.5px var(--mono); padding: 1px 6px; border-radius: 5px; background: rgba(var(--accent-rgb), .9); color: var(--on-accent); text-transform: uppercase; }
.sim-list { display: grid; gap: 8px; }
.sim { display: grid; grid-template-columns: 58px 1fr; gap: 10px; padding: 8px; border-radius: 12px; border: 1px solid var(--line); background: var(--soft); }
.sim-img { padding: 0; border: 0; width: 58px; height: 58px; border-radius: 10px; overflow: hidden; cursor: pointer; background: var(--soft-3); }
.sim-img img { width: 100%; height: 100%; object-fit: cover; }
.sim-txt { display: grid; gap: 4px; min-width: 0; }
.sim-name { border: 0; background: none; padding: 0; cursor: pointer; text-align: left; color: var(--ink); font-size: 13.5px; }
.sim-name:hover b { color: var(--cyan); }
.sim-name i { color: var(--ink-3); font-size: 12px; }
.sim-rel { display: flex; flex-wrap: wrap; gap: 4px; }
.rel { font: 600 10px var(--mono); padding: 1px 6px; border-radius: 5px; text-transform: uppercase; letter-spacing: .03em; }
.rel.vis { background: rgba(var(--accent-rgb), .15); color: var(--cyan); }
.rel.conf { background: rgba(var(--sel-rgb), .16); color: var(--amber); }
.rel.gen { background: rgba(155, 140, 255, .18); color: var(--violet); }

/* ---------- lightbox */
.lightbox { position: fixed; inset: 0; z-index: 150; display: grid; place-items: center; background: var(--scrim); backdrop-filter: blur(6px); animation: viewIn .3s var(--ease); padding: 16px; }
.lb-inner { position: relative; width: min(920px, 100%); max-height: calc(100vh - 32px); display: grid; grid-template-rows: 1fr auto; overflow: hidden; background: var(--panel-solid); }
.lb-media { display: grid; place-items: center; background: #000; min-height: 200px; }
.lb-media img, .lb-media video { max-width: 100%; max-height: calc(100vh - 220px); display: block; }
.lb-media iframe { width: 100%; aspect-ratio: 16 / 9; border: 0; }
.lb-meta { padding: 12px 16px; display: grid; gap: 6px; }
.lb-title { font: 600 15px var(--display); }
.lb-close { position: absolute; top: 10px; right: 10px; z-index: 2; width: 34px; height: 34px; border-radius: 50%; border: 0; cursor: pointer; background: rgba(0, 0, 0, .55); color: #fff; display: grid; place-items: center; }

/* ---------- mask editor */
.edit-bar { position: absolute; left: 50%; bottom: 12px; transform: translateX(-50%); z-index: 7; display: grid; gap: 6px; padding: 8px 10px; width: min(760px, calc(100% - 20px)); background: var(--panel-solid); animation: pop .35s var(--spring); }
.eb-tools { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.eb-tools .tool.on { color: var(--on-accent); background: linear-gradient(120deg, var(--amber), #ffd99a); }
.eb-size { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--ink-3); margin-left: 6px; }
.eb-hint { font-size: 12px; color: var(--ink-2); }
.eb-actions { display: flex; justify-content: flex-end; gap: 6px; }
body[data-tool="edit-brush"] #stageCanvas, body[data-tool="edit-erase"] #stageCanvas { cursor: none; }
body[data-tool="edit-smart"] #stageCanvas { cursor: copy; }
@media (max-width: 560px) {
  .theme-switch button { width: 26px; }
  .sp-head, .sp-skel { grid-template-columns: 80px 1fr; }
  .sp-hero, .sk-hero { width: 80px; height: 80px; }
  .eb-tools .tool span { display: none; }
  .workspace.wide { grid-template-columns: 1fr; }
}
/* compact editor bar: tools + actions on one row, hint underneath */
.edit-bar { grid-template-columns: 1fr auto; align-items: center; column-gap: 10px; row-gap: 2px; padding: 6px 8px; bottom: 8px; }
.edit-bar .eb-tools { grid-column: 1; grid-row: 1; }
.edit-bar .eb-actions { grid-column: 2; grid-row: 1 / span 2; align-self: center; }
.edit-bar .eb-hint { grid-column: 1; grid-row: 2; font-size: 11.5px; padding-left: 4px; }
@media (max-width: 860px) { .edit-bar { grid-template-columns: 1fr; } .edit-bar .eb-actions { grid-column: 1; grid-row: 3; } }

/* dark theme: spotlight a touch fainter */
:root:not([data-theme]) , :root[data-theme="dark"] { --spot: rgba(120, 230, 255, .045); --spot-strong: rgba(120, 240, 255, .11); }
/* instance cards are selectable as a whole */
.icard { cursor: pointer; }
.icard .acts, .icard .cap { cursor: auto; }
/* instance switcher in the Species tab */
.sp-inst { display: flex; gap: 6px; overflow-x: auto; padding: 8px 12px; border-bottom: 1px solid var(--line); scrollbar-width: thin; }
.sp-inst .chip { padding: 3px 9px 3px 3px; font-size: 12px; }
.sp-inst .chip canvas { width: 26px; height: 26px; border-radius: 6px; }

/* ---------- hero showcase: cross-fading scenes */
.demo-frame .hero-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity 1.4s var(--ease); filter: saturate(1.1) contrast(1.05); }
.demo-frame .hero-img.on { opacity: 1; }
.demo-frame.loading { background: linear-gradient(110deg, #04223a 30%, #0a3a5c 50%, #04223a 70%); background-size: 200% 100%; animation: skel 1.6s linear infinite; }
.demo-frame.loading .demo-caption, .demo-frame.loading .sonar { opacity: 0; }
.hero-dots { position: absolute; top: 12px; right: 14px; display: flex; gap: 6px; z-index: 3; }
.hero-dots button { width: 8px; height: 8px; padding: 0; border: 0; border-radius: 999px; background: rgba(255, 255, 255, .45); cursor: pointer; transition: width .4s var(--spring), background .3s; }
.hero-dots button.on { width: 22px; background: #fff; }
.hero-svg { z-index: 1; }

/* ---------- realistic photo backdrops (Maritime / Sunlit reef). Public-domain / CC0, see static/bg/credits.json */
#bgPhoto { position: fixed; inset: 0; z-index: -3; overflow: hidden; pointer-events: none; opacity: 0; transition: opacity 1.2s var(--ease); background: var(--abyss); }
#bgPhoto i { position: absolute; inset: -5%; background-size: cover; background-position: center; background-repeat: no-repeat;
  transform: translate3d(var(--px, 0px), var(--py, 0px), 0); animation: kenburns 80s ease-in-out infinite alternate; will-change: transform; transition: filter .8s var(--ease); }
@keyframes kenburns { from { scale: 1; } to { scale: 1.07; } }
#bgPhoto::after { content: ""; position: absolute; inset: 0; background: var(--photo-veil, none); transition: background .8s; }
:root[data-theme="ocean"] #bgPhoto, :root[data-theme="light"] #bgPhoto, :root[data-theme="dark"] #bgPhoto { opacity: 1; }
:root[data-theme="dark"] #bgPhoto i { background-image: url(../bg/deep-a.jpg); background-image: image-set(url(../bg/deep-a.webp) type("image/webp"), url(../bg/deep-a.jpg) type("image/jpeg")); background-position: center 45%; }
:root[data-theme="dark"][data-deep="b"] #bgPhoto i { background-image: url(../bg/deep-b.jpg); background-image: image-set(url(../bg/deep-b.webp) type("image/webp"), url(../bg/deep-b.jpg) type("image/jpeg")); background-position: center 55%; }
:root[data-theme="ocean"] #bgPhoto i { background-image: url(../bg/reef.jpg); background-image: image-set(url(../bg/reef.webp) type("image/webp"), url(../bg/reef.jpg) type("image/jpeg")); background-position: center 72%; }
:root[data-theme="light"] #bgPhoto i { background-image: url(../bg/maritime.jpg); background-image: image-set(url(../bg/maritime.webp) type("image/webp"), url(../bg/maritime.jpg) type("image/jpeg")); background-position: center 58%; }
@media (max-width: 900px) {
  :root[data-theme="ocean"] #bgPhoto i { background-image: url(../bg/reef-m.jpg); background-image: image-set(url(../bg/reef-m.webp) type("image/webp"), url(../bg/reef-m.jpg) type("image/jpeg")); }
  :root[data-theme="light"] #bgPhoto i { background-image: url(../bg/maritime-m.jpg); background-image: image-set(url(../bg/maritime-m.webp) type("image/webp"), url(../bg/maritime-m.jpg) type("image/jpeg")); }
  :root[data-theme="dark"] #bgPhoto i { background-image: url(../bg/deep-a-m.jpg); background-image: image-set(url(../bg/deep-a-m.webp) type("image/webp"), url(../bg/deep-a-m.jpg) type("image/jpeg")); }
  :root[data-theme="dark"][data-deep="b"] #bgPhoto i { background-image: url(../bg/deep-b-m.jpg); background-image: image-set(url(../bg/deep-b-m.webp) type("image/webp"), url(../bg/deep-b-m.jpg) type("image/jpeg")); }
}
:root[data-theme="ocean"] { --photo-veil: linear-gradient(100deg, rgba(0, 48, 92, .62) 0%, rgba(0, 66, 112, .32) 42%, rgba(0, 70, 120, .06) 72%), linear-gradient(to bottom, rgba(0, 40, 80, .05) 55%, rgba(0, 28, 58, .45)); }
:root[data-theme="light"] { --photo-veil: linear-gradient(100deg, rgba(248, 252, 255, .78) 0%, rgba(248, 252, 255, .45) 40%, rgba(248, 252, 255, .05) 72%); }
:root[data-theme="dark"] { --photo-veil: linear-gradient(100deg, rgba(2, 8, 20, .72) 0%, rgba(2, 10, 26, .38) 45%, rgba(2, 10, 26, .1) 75%), linear-gradient(to bottom, rgba(2, 8, 20, .25), rgba(2, 8, 20, 0) 30%, rgba(2, 8, 20, .35)); }
/* inside the app the photo steps back: softer, more veiled, no drift */
body:not([data-route="home"]) #bgPhoto i { filter: blur(3px) saturate(1.08); animation-play-state: paused; }
:root[data-theme="ocean"] body:not([data-route="home"]) #bgPhoto::after { background: rgba(0, 50, 95, .32); }
:root[data-theme="light"] body:not([data-route="home"]) #bgPhoto::after { background: rgba(244, 249, 253, .06); }
:root[data-theme="light"] body:not([data-route="home"]) #bgPhoto i { filter: blur(1.5px) saturate(1.15); }
:root[data-theme="light"] .app { --glass-bg: linear-gradient(160deg, rgba(255, 255, 255, .7), rgba(240, 248, 253, .58)); }
:root[data-theme="dark"] body:not([data-route="home"]) #bgPhoto::after { background: rgba(2, 8, 20, .4); }
/* typography on the photos */
:root[data-theme="light"] .hero-title, :root[data-theme="light"] .section-head h2 { text-shadow: 0 1px 24px rgba(255, 255, 255, .9); }
:root[data-theme="light"] .lead, :root[data-theme="light"] .sub, :root[data-theme="light"] .stat-row span { text-shadow: 0 1px 12px rgba(255, 255, 255, .95); }
:root[data-theme="ocean"] .section-head .sub, :root[data-theme="ocean"] .lead { color: #f1fbff; }
@media (prefers-reduced-motion: reduce) { #bgPhoto i { animation: none; } }
/* outline buttons stay readable over busy photos */
:root[data-theme="ocean"] .btn-ghost { background: rgba(0, 40, 80, .38); border-color: rgba(255, 255, 255, .35); color: #fff; backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
:root[data-theme="light"] .btn-ghost { background: rgba(255, 255, 255, .6); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
:root[data-theme="ocean"] .app .btn-ghost, :root[data-theme="ocean"] .page .btn-ghost { background: rgba(255, 255, 255, .55); color: var(--ink); border-color: var(--line-2); }

/* deep-sea home: the shader draws the photo (with fluid refraction), so the static copy steps aside */
body.fluid-bg #bgPhoto { opacity: 0 !important; transition-delay: .3s; }
/* Maritime in the app: let the sea and sky show through clearly */
:root[data-theme="light"] .app { --glass-bg: linear-gradient(160deg, rgba(255, 255, 255, .55), rgba(240, 248, 253, .4)); }
:root[data-theme="light"] body:not([data-route="home"]) #bgPhoto::after { background: none; }
:root[data-theme="light"] body:not([data-route="home"]) #bgPhoto i { filter: blur(.8px) saturate(1.18); }
:root[data-theme="light"] .app .glass { backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2); }

/* Sunlit reef inside the app: the busy coral photo recedes (fainter, softer) so the workspace stays calm */
:root[data-theme="ocean"] body:not([data-route="home"]) #bgPhoto i { filter: blur(7px) saturate(.9); opacity: .55; }
:root[data-theme="ocean"] body:not([data-route="home"]) #bgPhoto::after { background: rgba(70, 160, 210, .38); }
:root[data-theme="ocean"] body:not([data-route="home"]) #bgPhoto { background: #6cc4ec; }

/* model loading progress */
.loading-note { display: grid; gap: 5px; }
.ln-bar { height: 3px; border-radius: 3px; background: rgba(var(--sel-rgb), .18); overflow: hidden; }
.ln-bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--amber), var(--cyan)); transition: width .9s linear; }

/* keyboard focus: a clear ring for keyboard users only (mouse clicks keep the clean look) */
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }
a:focus-visible, button:focus-visible, [role="radio"]:focus-visible, [tabindex]:focus-visible, .chip:focus-visible, .sugg:focus-visible, .tab:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 2px; box-shadow: 0 0 0 5px rgba(var(--accent-rgb), .22); }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid var(--cyan); outline-offset: 1px; }
.composer textarea:focus-visible, .fb-box textarea:focus-visible { outline: none; }   /* their container already lights up */
:root[data-theme="ocean"] :focus-visible { outline-color: #0b5f99; }

/* ---------- phones: explore bar on two rows, drop area that scrolls instead of clipping */
@media (max-width: 860px) {
  .drop { display: flex; }
  .drop-inner { margin: auto; }                 /* centred when it fits, top-aligned (scrollable) when it doesn't */
}
@media (max-width: 560px) {
  .seg-switch { flex: 1 1 auto; }
  .seg-switch button { flex: 1; justify-content: center; }
  .model-picker { flex: 1 1 100%; order: 3; }
  .mp-btn .mp-name { max-width: none; flex: 1; text-align: left; }
  .drop { padding: 14px 12px; }
  .drop-ico { width: 54px; height: 54px; border-radius: 16px; margin-bottom: 10px; } .drop-ico svg { width: 24px; height: 24px; }
  .drop h3 { font-size: 19px; }
  .drop p { font-size: 13.5px; }
  .gallery { gap: 8px; }
  .tab { padding: 9px 10px 11px; font-size: 13.5px; }
  .composer { margin-left: 8px; margin-right: 8px; }
}

/* mask editor on phones: bar below the picture, touch-only Cut tool */
.tool.touch-only { display: none; }
@media (hover: none) and (pointer: coarse) { .tool.touch-only { display: flex; } }
.stage-wrap > .edit-bar { position: static; transform: none; width: auto; }