/* ============================================================================
   SOMA — unified design system  (see DESIGN.md)
   Dark, clinical, instrument-grade. Pure-black canvas, white/ice data. Colour is
   used sparingly: the one cool "ice" accent for live data (attention arc,
   playhead, focus) plus a small set of status accents (--ok/--amber/--hyp) for
   the roadmap rungs and upload states. The warm fMRI "hot" colormap is confined
   to the decorative 3D cortex hero (brain3d.js). One type system, one palette,
   one motion language — shared with waitlist.html and pitch.html.
   ============================================================================ */

:root{
  /* surfaces — pure black lab + tinted-neutral elevation */
  --base:#000000;
  --surface-1:#0C0C0E;
  --surface-2:#141416;
  --surface-3:#1C1C1F;
  --hair:rgba(255,255,255,.08);
  --hair-soft:rgba(255,255,255,.055);
  --hair-strong:rgba(255,255,255,.14);

  /* ink ramp — tuned for AA on the near-black surfaces */
  --ink:#F5F5F7;
  --dim:#ADADB2;
  --faint:#7C7C82;

  /* the one data accent (ice) */
  --ice:#BFE0EC;
  --ice-dim:#8FB3C0;

  /* status accents — roadmap rungs (live/next) + upload states (ok/err) */
  --ok:#4ADE9E;
  --amber:#FFCB5C;
  --hyp:#FF7A7A;

  /* type */
  --sans:-apple-system,BlinkMacSystemFont,'SF Pro Display','Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  --mono:ui-monospace,'SF Mono','SFMono-Regular','Menlo','Cascadia Mono','Roboto Mono',monospace;

  /* motion */
  --ease:cubic-bezier(.22,1,.36,1);
  --ease-soft:cubic-bezier(.33,1,.68,1);
  --dur-1:.16s; --dur-2:.28s; --dur-3:.5s;

  /* z-scale */
  --z-bg:0; --z-content:1; --z-hud:3; --z-nav:40;

  --maxw:1080px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:78px;-webkit-text-size-adjust:100%}
body{
  background:var(--base);color:var(--ink);
  font-family:var(--sans);line-height:1.6;font-size:16px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;position:relative;
}
::selection{background:rgba(191,224,236,.24);color:#fff}
a{color:inherit}
.mono{font-family:var(--mono)}
.hidden{display:none !important}

/* focus — one visible ice ring everywhere */
:focus-visible{outline:2px solid var(--ice);outline-offset:2px;border-radius:4px}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,label:focus-visible{outline-offset:3px}
/* visually hidden but still focusable / in the a11y tree (e.g. the file input) */
.vhidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---- background layers (2D scrollbrain + veil) ----------------------------- */
#scrollBrain{position:fixed;inset:0;width:100%;height:100%;z-index:var(--z-bg);pointer-events:none;display:block}
#brainVeil{position:fixed;inset:0;z-index:var(--z-bg);pointer-events:none;
  background:radial-gradient(120% 100% at 50% 42%,rgba(0,0,0,0) 30%,rgba(0,0,0,.55) 100%),
             linear-gradient(180deg,rgba(0,0,0,.14),rgba(0,0,0,.4))}
nav,.wrap,footer{position:relative;z-index:var(--z-content)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(16px,4vw,22px)}

/* ---- nav ------------------------------------------------------------------- */
nav{position:fixed;top:0;left:0;right:0;z-index:var(--z-nav);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px clamp(16px,4vw,26px);
  /* gradient scrim instead of backdrop-filter: a fixed blurred bar re-composites the
     whole page width on every scroll frame — the gradient keeps text legible for free */
  background:linear-gradient(180deg,rgba(0,0,0,.88),rgba(0,0,0,.52) 58%,rgba(0,0,0,0));
  transition:opacity var(--dur-3) var(--ease),transform var(--dur-3) var(--ease)}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:-.02em}
.brand .orb{width:20px;height:20px;border-radius:50%;flex-shrink:0;
  background:radial-gradient(circle at 34% 30%,#fff,#c9d3d8 40%,#5b6b72 72%,#10161a);
  box-shadow:0 0 0 1px rgba(255,255,255,.06),0 0 18px -4px rgba(191,224,236,.45)}
.brand small{font-family:var(--mono);font-size:10px;color:var(--faint);letter-spacing:.16em;text-transform:uppercase;margin-left:2px}
.navright{display:flex;align-items:center;gap:10px}
.chip{font-family:var(--mono);font-size:11px;color:var(--dim);border:1px solid var(--hair);border-radius:999px;
  padding:5px 12px;background:rgba(12,12,14,.6);white-space:nowrap}
.navcta{font-family:var(--mono);font-size:11.5px;font-weight:600;color:#08090c;text-decoration:none;border-radius:999px;
  padding:7px 14px;white-space:nowrap;letter-spacing:.01em;background:var(--ink);
  transition:transform var(--dur-1) var(--ease),box-shadow var(--dur-1) var(--ease)}
.navcta:hover{transform:translateY(-1px);box-shadow:0 6px 20px -8px rgba(255,255,255,.4)}
.navcta:active{transform:translateY(0)}
/* keep the conversion CTA on mobile; drop the decorative chip + working-name tag so
   brand + CTA fit within ~320px without overflow */
@media(max-width:560px){.navright .chip,.brand small{display:none}}

/* ---- shared type + labels -------------------------------------------------- */
h1,h2,h3{text-wrap:balance}
h1{font-weight:700;font-size:clamp(28px,4.6vw,46px);line-height:1.05;letter-spacing:-.03em}
h1 .grad{color:var(--ice)}                    /* emphasis = ice accent, never a gradient fill */
.sub{font-size:clamp(15px,1.6vw,17px);color:var(--dim);max-width:60ch;text-wrap:pretty}
.kick{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ice-dim);
  display:inline-flex;align-items:center;gap:9px;margin-bottom:16px}
.kick i{width:6px;height:6px;border-radius:50%;background:var(--ice);box-shadow:0 0 10px -1px var(--ice)}
.eye{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);margin-bottom:12px}

/* ==========================================================================
   3D CORTEX TOUR (brain3d.js) — translucent fsaverage hero + scroll flythrough.
   Base rules = graceful FALLBACK (readable stacked chapters over the 2D brain).
   .brain3d-on upgrades to the pinned 3D stage. DECORATION only.
   ========================================================================== */
#brain-tour{position:relative;z-index:var(--z-content);isolation:isolate}
#brainStage{position:relative}
#brainCanvas{display:none}
.hud{display:none}
.chapters{position:relative}
.chapter{padding:clamp(32px,6vw,56px) max(6vw,22px)}
/* NB: no backdrop-filter here — panels sit over the animating brain, and re-blurring a
   moving canvas every frame is a scroll-jank source. The .chapter::before scrim + a more
   opaque panel bg give the same legibility with zero per-frame compositing cost. */
.panel{max-width:440px;
  background:linear-gradient(180deg,rgba(10,11,13,.95),rgba(10,11,13,.86));
  border:1px solid var(--hair);border-radius:24px;padding:22px 24px;
  box-shadow:0 30px 80px -44px rgba(0,0,0,.95),inset 0 1px 0 rgba(255,255,255,.04)}
.panel-hero{max-width:680px}
.panel .ch-tag{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--ice-dim);margin-bottom:12px}
.panel h2{font-weight:700;font-size:clamp(22px,3vw,30px);line-height:1.08;letter-spacing:-.025em;margin-bottom:11px}
.panel p{font-size:15px;color:var(--dim);line-height:1.58;margin-bottom:15px;text-wrap:pretty}
.panel p b{color:var(--ink);font-weight:600}
@keyframes cuebob{0%,100%{transform:translateY(0)}50%{transform:translateY(5px)}}
.panel-cta{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:12px;color:#08090c;font-weight:600;
  text-decoration:none;border-radius:999px;padding:10px 18px;background:var(--ink);
  transition:transform var(--dur-1) var(--ease),box-shadow var(--dur-1) var(--ease)}
.panel-cta:hover{transform:translateY(-1px);box-shadow:0 8px 24px -10px rgba(255,255,255,.45)}
.panel-cta span{transition:transform var(--dur-2) var(--ease)}
.panel-cta:hover span{transform:translateY(3px)}

/* ---- upgraded: pinned 3D stage + scroll-driven chapters ---- */
.brain3d-on #brainStage{position:sticky;top:0;height:100svh;overflow:hidden;background:#000}
.brain3d-on #brainCanvas{display:block;position:absolute;inset:0;width:100%;height:100%}
.brain3d-on .hud{display:block}
.brain3d-on #scrollBrain,.brain3d-on #brainVeil{display:none}
.brain3d-on.at-hero-top nav{opacity:0;transform:translateY(-10px);pointer-events:none}
.hud-watermark{transition:opacity .6s var(--ease)}
.brain3d-on.at-hero-top .hud-watermark{opacity:0}
.brain3d-on .chapters{margin-top:-100svh;z-index:2}
/* 160svh (not 100) gives each camera dolly ~60% more scroll runway, so the flythrough
   glides in instead of snapping a whole zoom per wheel-flick — the fix for "zoom too quick"
   and for the strobing that fast motion over the translucent brain reads as. */
.brain3d-on .chapter{min-height:160svh;display:flex;align-items:center;justify-content:flex-end;pointer-events:none}
.brain3d-on .chapter[data-ch="0"]{justify-content:flex-start}
/* legibility scrim: a soft radial darken travels with each active panel so copy
   always clears contrast over the busy translucent brain */
.brain3d-on .chapter::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:0;
  transition:opacity var(--dur-3) var(--ease);
  background:radial-gradient(70% 80% at 78% 50%,rgba(0,0,0,.42),rgba(0,0,0,0) 70%)}
.brain3d-on .chapter[data-ch="0"]::before{background:radial-gradient(64% 78% at 26% 46%,rgba(0,0,0,.44),rgba(0,0,0,0) 72%)}
.brain3d-on .chapter.is-active::before{opacity:1}
/* opacity + transform are driven inline per-frame by brain3d.js (updatePanels), keyed to the
   real scroll position — so NO CSS transition here (it would smear/lag the per-frame values).
   These are just the pre-JS / fallback resting state; the is-active rule keeps the no-inline
   path visible if the module ever toggles is-active without having painted a frame yet. */
.brain3d-on .panel{opacity:0;transform:translateY(10px);pointer-events:auto;will-change:opacity,transform}
.brain3d-on .chapter.is-active .panel{opacity:1;transform:none}

/* ---- HUD: one subtle grounding label over the brain (instrument chrome removed) ---- */
.hud{position:absolute;inset:0;pointer-events:none;z-index:var(--z-hud)}
.hud-watermark{position:absolute;bottom:20px;left:0;right:0;text-align:center;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--faint)}

/* minimal scroll cue — a single down-chevron at the very top (no banner, no copy, no scrim).
   Shown ONLY at hero-top via .at-hero-top (a plain scroll listener, independent of the WebGL
   loop). Lives inside .hud → already brain3d-on-gated. A soft drop-shadow keeps it legible
   over the resting brain; it fades out the moment you scroll in. */
.herocue{position:absolute;left:0;right:0;bottom:clamp(30px,7vh,60px);display:flex;justify-content:center;
  color:var(--ice);opacity:0;transition:opacity .6s var(--ease);pointer-events:none}
.brain3d-on.at-hero-top .herocue{opacity:.9}
.herocue svg{width:26px;height:14px;filter:drop-shadow(0 1px 5px rgba(0,0,0,.85));animation:cuebob 1.7s var(--ease-soft) infinite}

/* fallback: no WebGL / load failed → readable stacked chapters, no 3D chrome */
.brain3d-failed #brainStage{position:relative;height:auto;background:none}
.brain3d-failed #brainCanvas,.brain3d-failed .hud{display:none}
.brain3d-failed .chapters{margin-top:0}
.brain3d-failed .chapter{min-height:auto;padding:34px max(6vw,22px)}
.brain3d-failed .chapter::before{display:none}
.brain3d-failed .panel{opacity:1;transform:none}

/* ==========================================================================
   READ-OUT CONSOLE
   ========================================================================== */
.console,.compare,.vision{background:var(--surface-1);border:1px solid var(--hair);border-radius:24px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.035),0 32px 90px -56px rgba(0,0,0,.95);
  scroll-margin-top:84px}
/* NB: no overflow:hidden here — it would break the sticky .stage-left column.
   The rounded corners are safe because every child is inset by section padding. */
.console{margin:clamp(22px,5vh,34px) 0}
.cbar{display:flex;align-items:center;gap:8px;padding:12px 18px;border-bottom:1px solid var(--hair-soft);
  font-family:var(--mono);font-size:11px;color:var(--faint);letter-spacing:.05em}
.cbar .stat{width:7px;height:7px;border-radius:50%;background:var(--ice);box-shadow:0 0 8px -1px var(--ice);flex-shrink:0}
.cbar .lbl{margin-left:auto;text-transform:uppercase;letter-spacing:.14em}

.pick{padding:clamp(16px,3vw,20px)}
/* responsive picker: an EXPLICIT column count per breakpoint (4 desktop / 2 tablet / 1 phone,
   see the ladder in the RESPONSIVE block). Deterministic on purpose — auto-fit re-measured the
   container and could flip 3↔4 columns on a scrollbar/reflow tick, so cards "spawned" in
   different spots between loads. Fixed columns don't. Live arcs append onto row 2+ (no shift). */
.vids{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.vid{cursor:pointer;border:1px solid var(--hair);border-radius:18px;overflow:hidden;background:var(--surface-2);
  transition:border-color var(--dur-2) var(--ease),transform var(--dur-2) var(--ease),box-shadow var(--dur-2) var(--ease)}
.vid:hover{transform:translateY(-3px);border-color:var(--hair-strong);box-shadow:0 18px 40px -28px rgba(0,0,0,.9)}
.vid.active{border-color:var(--ice);box-shadow:0 0 0 1px var(--ice),0 20px 44px -26px rgba(191,224,236,.4)}
.vthumb{aspect-ratio:16/10;position:relative;display:flex;align-items:flex-end;justify-content:flex-end;padding:10px;overflow:hidden}
.vthumb canvas{position:absolute;inset:0;width:100%;height:100%;display:block;opacity:.9}
.vthumb .play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:36px;height:36px;border-radius:50%;
  background:rgba(8,9,12,.55);border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(3px);
  display:flex;align-items:center;justify-content:center;transition:transform var(--dur-2) var(--ease),background var(--dur-2)}
.vid:hover .vthumb .play{transform:translate(-50%,-50%) scale(1.08);background:rgba(8,9,12,.7)}
.vthumb .play svg{width:12px;height:12px;margin-left:2px;fill:var(--ink)}
/* lone runtime chip, bottom-right — the source/evidence tag lives once under the title */
.vmeta{position:relative;font-family:var(--mono);font-size:10px;color:#fff;letter-spacing:.04em;
  padding:3px 7px;border-radius:7px;background:rgba(8,9,12,.5);
  text-shadow:0 1px 4px rgba(0,0,0,.6);font-variant-numeric:tabular-nums}
.vtitle{padding:10px 12px;font-size:13px;font-weight:600;letter-spacing:-.01em}
.vtitle span{display:block;font-family:var(--mono);font-size:10px;font-weight:400;color:var(--faint);margin-top:3px;letter-spacing:.05em;text-transform:uppercase}

.analysis{padding:0 clamp(16px,3vw,20px) clamp(18px,3vw,22px)}
.stage{display:grid;grid-template-columns:300px 1fr;gap:16px;margin-top:2px;align-items:start}
.stage-left{display:flex;flex-direction:column;gap:12px;position:sticky;top:84px}

.brainbox{background:var(--surface-2);border:1px solid var(--hair);border-radius:20px;padding:14px;position:relative;overflow:hidden}
.advideo{width:100%;display:block;border-radius:12px;margin-bottom:10px;background:#000;border:1px solid var(--hair)}
.bx-h{font-family:var(--mono);font-size:10px;letter-spacing:.13em;text-transform:uppercase;color:var(--faint);display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.bx-h b{color:var(--ice);font-weight:700;font-variant-numeric:tabular-nums}
#brainSvg{width:100%;height:auto;display:block}
.upico{width:15px;height:15px;color:var(--ice-dim);flex-shrink:0}
.cortexchip{font-family:var(--mono);font-size:10px;color:var(--dim);margin-top:10px;letter-spacing:.02em;border-top:1px solid var(--hair-soft);padding-top:9px;line-height:1.6}

.right{display:flex;flex-direction:column;gap:12px;min-width:0}
.lane{background:var(--surface-2);border:1px solid var(--hair);border-radius:18px;padding:13px 15px}
.lane-h{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:8px}
.lane-h .name{font-weight:600;font-size:14px;letter-spacing:-.01em}
.lane-h .name small{font-family:var(--mono);font-weight:400;font-size:10px;color:var(--faint);display:block;letter-spacing:.02em;margin-top:2px}
/* per-lane evidence badge — the honesty tier the console reads at (amber=validating, red=hypothesis) */
.lane-badge{flex-shrink:0;align-self:center;font-family:var(--mono);font-size:9px;letter-spacing:.04em;text-transform:uppercase;padding:3px 7px;border-radius:6px;white-space:nowrap;border:1px solid var(--hair);color:var(--dim);cursor:help}
.lane-badge.g{color:var(--ok);border-color:rgba(74,222,158,.42);background:rgba(74,222,158,.08)}
.lane-badge.a{color:var(--amber);border-color:rgba(255,203,92,.42);background:rgba(255,203,92,.08)}
.lane-badge.r{color:var(--hyp);border-color:rgba(255,122,122,.42);background:rgba(255,122,122,.08)}
canvas.lanec{width:100%;height:auto;display:block;cursor:crosshair;border-radius:12px}

.callout{margin:0;padding:10px 14px;border-radius:14px;background:rgba(255,122,122,.1);border:1px solid rgba(255,122,122,.4);color:#ffd9d9;font-size:13px}
.callout strong{color:#fff}
.callout em{color:#ffbcbc;font-style:normal;font-family:var(--mono);font-size:11px}
.cico{width:14px;height:14px;vertical-align:-2px;margin-right:5px;color:var(--hyp)}

/* coarse discrete-state distribution */
.coarse-legend{display:flex;flex-wrap:wrap;gap:8px 14px;margin-top:9px;font-family:var(--mono);font-size:10px;color:var(--dim)}
.cs-key{display:inline-flex;align-items:center;gap:6px}
.cs-key i{width:9px;height:9px;border-radius:3px;display:inline-block}

/* transport — attached directly beneath the lanes */
.transport{display:flex;align-items:center;gap:14px;padding:4px 4px 2px;margin-top:2px}
.pbtn{width:40px;height:40px;border-radius:50%;border:1px solid var(--hair);background:var(--surface-3);cursor:pointer;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
  transition:border-color var(--dur-1) var(--ease),transform var(--dur-1) var(--ease),background var(--dur-1)}
.pbtn:hover{border-color:var(--ice);background:#232327;transform:scale(1.04)}
.pbtn:active{transform:scale(.97)}
.pbtn svg{width:13px;height:13px;fill:var(--ink)}
.scrub{flex:1;min-width:0;-webkit-appearance:none;appearance:none;height:6px;border-radius:999px;
  background:linear-gradient(90deg,var(--ice) 0%,var(--ice) var(--val,0%),var(--surface-3) var(--val,0%),var(--surface-3) 100%);
  outline:none;cursor:pointer}
/* slim ice ticker to match the lane playheads (not a media-player white dot); the 18px
   height + the 6px track keep a comfortable drag/hit area despite the narrow visual */
.scrub::-webkit-slider-thumb{-webkit-appearance:none;width:6px;height:18px;border-radius:3px;background:var(--ice);
  box-shadow:0 0 0 1px rgba(8,9,12,.55),0 0 10px -2px var(--ice);cursor:pointer;transition:box-shadow var(--dur-1)}
.scrub::-webkit-slider-thumb:hover{box-shadow:0 0 0 1px rgba(8,9,12,.55),0 0 14px 0 var(--ice)}
.scrub::-moz-range-thumb{width:6px;height:18px;border:none;border-radius:3px;background:var(--ice);box-shadow:0 0 0 1px rgba(8,9,12,.55),0 0 10px -2px var(--ice);cursor:pointer}
.scrub::-moz-range-progress{height:6px;border-radius:999px;background:var(--ice)}
.scrub:focus-visible{outline:2px solid var(--ice);outline-offset:4px}
.tstamp{font-family:var(--mono);font-size:12px;color:var(--dim);min-width:92px;text-align:right;font-variant-numeric:tabular-nums}

/* ---- upload box (concierge intake) — full-width panel below the stage ---- */
.uploadbox{margin:16px 0 2px;border:1px solid var(--hair);border-radius:20px;
  padding:16px 18px;background:linear-gradient(180deg,rgba(255,255,255,.022),rgba(255,255,255,0))}
.uploadbox-h{display:flex;align-items:center;gap:8px;font-weight:650;font-size:15px;color:var(--ink);letter-spacing:-.01em}
.uploadbox-s{font-size:12.5px;color:var(--dim);margin:5px 0 13px;line-height:1.55;max-width:62ch}
.uploadbox-row{display:flex;flex-wrap:wrap;gap:9px;align-items:center}
.filepick{display:inline-flex;align-items:center;gap:8px;flex:1 1 200px;min-width:0;font-size:13px;color:var(--dim);
  background:var(--surface-2);border:1px solid var(--hair);border-radius:14px;padding:10px 13px;cursor:pointer;
  transition:border-color var(--dur-1) var(--ease),color var(--dur-1)}
.filepick:hover{border-color:var(--hair-strong);color:var(--ink)}
/* the file input is visually hidden but focusable; reflect its focus on the styled label */
.filepick:focus-within{border-color:var(--ice);outline:2px solid var(--ice);outline-offset:2px}
.filepick span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.uploademail{flex:1 1 180px;min-width:0;font-family:var(--sans);font-size:13px;color:var(--ink);background:var(--surface-2);
  border:1px solid var(--hair);border-radius:14px;padding:10px 13px;transition:border-color var(--dur-1) var(--ease)}
.uploademail::placeholder{color:var(--dim)}
.uploademail:focus{border-color:var(--ice)}
.uploadbtn{flex:0 0 auto;background:var(--ink);color:#08090c;border:1px solid transparent;border-radius:14px;padding:10px 18px;
  font-weight:650;cursor:pointer;font-size:13px;transition:transform var(--dur-1) var(--ease),box-shadow var(--dur-1) var(--ease),opacity var(--dur-1)}
.uploadbtn:hover{transform:translateY(-1px);box-shadow:0 8px 22px -10px rgba(255,255,255,.45)}
.uploadbtn:active{transform:translateY(0)}
.uploadbtn:disabled{opacity:.5;cursor:progress;transform:none;box-shadow:none}
.uploadstatus{font-size:12px;line-height:1.55;color:var(--dim)}
.uploadstatus:not(:empty){margin-top:11px}
.uploadstatus.ok{color:var(--ok)}
.uploadstatus.err{color:var(--hyp)}
.uploadstatus.busy{color:var(--ice)}
.uploadstatus.muted{color:var(--faint)}

/* ==========================================================================
   A/B COMPARE
   ========================================================================== */
.compare{margin:clamp(22px,5vh,34px) 0;padding:clamp(20px,3vw,28px)}
.cmp-h{display:flex;justify-content:space-between;align-items:flex-start;gap:18px;flex-wrap:wrap;margin-bottom:14px}
.compare h3{font-size:20px;font-weight:640;letter-spacing:-.02em;margin:2px 0 5px}
.compare p.s{color:var(--dim);font-size:13.5px;max-width:58ch;text-wrap:pretty}
.cmp-sel{display:flex;gap:12px;flex-shrink:0}
.cmp-sel label{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);display:flex;flex-direction:column;gap:6px}
.cmp-sel select{font-family:var(--mono);font-size:12px;color:var(--ink);background:var(--surface-2);border:1px solid var(--hair);
  border-radius:12px;padding:8px 11px;cursor:pointer;min-width:158px;transition:border-color var(--dur-1) var(--ease)}
.cmp-sel select:hover{border-color:var(--hair-strong)}
.cmp-sel select:focus-visible{border-color:var(--ice)}
canvas#cmpCanvas{width:100%;height:auto;display:block;border-radius:16px;cursor:crosshair}
.cmp-legend{display:flex;gap:20px;margin-top:12px;font-family:var(--mono);font-size:11px;color:var(--dim);flex-wrap:wrap}
.cmp-legend .k{display:inline-flex;align-items:center;gap:8px}
.cmp-legend .k i{width:16px;height:0;border-top-width:3px;border-top-style:solid;display:inline-block}
.cmp-note{font-family:var(--mono);font-size:11.5px;color:var(--dim);margin-top:11px;letter-spacing:.01em;line-height:1.6}
.cmp-note b{color:var(--ink)}

/* ==========================================================================
   ROADMAP / VISION
   ========================================================================== */
.vision{margin:clamp(22px,5vh,34px) 0;padding:clamp(20px,3vw,28px);position:relative}
.vision .tag{position:absolute;top:-11px;left:20px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--dim);background:var(--surface-1);border:1px solid var(--hair-strong);border-radius:7px;padding:3px 11px}
.vision h3{font-size:20px;font-weight:640;letter-spacing:-.02em;margin:2px 0 5px}
.vision p.s{color:var(--dim);font-size:13.5px;max-width:66ch;margin-bottom:18px;text-wrap:pretty}
.ladder{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.rung{display:grid;grid-template-columns:70px 1fr;gap:14px;align-items:start;font-size:13px;color:var(--dim);opacity:.72}
.rung.live{opacity:1;color:var(--ink)}
.rung.next{opacity:.92}
.rung .lvl{font-family:var(--mono);font-size:10px;padding:4px 8px;border-radius:8px;border:1px solid var(--hair);text-align:center;white-space:nowrap;color:var(--dim)}
.rung.live .lvl{color:var(--ok);border-color:rgba(74,222,158,.42);background:rgba(74,222,158,.07)}
.rung.next .lvl{color:var(--amber);border-color:rgba(255,203,92,.42);background:rgba(255,203,92,.06)}
.rung b{color:var(--ink);font-weight:600}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer{text-align:center;padding:32px 0 48px;font-family:var(--mono);font-size:11px;color:var(--faint);letter-spacing:.03em;line-height:1.95}
footer .foot-links{display:flex;gap:18px;flex-wrap:wrap;justify-content:center;margin-bottom:16px;font-size:12px}
footer .foot-links a{color:var(--dim);text-decoration:none;transition:color .16s var(--ease)}
footer .foot-links a:hover{color:var(--ink)}

/* ==========================================================================
   REVEAL ON SCROLL (enhances already-visible content; JS adds .in)
   ========================================================================== */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media(max-width:880px){
  .stage{grid-template-columns:1fr}
  .stage-left{position:static;top:auto;flex-direction:column}
}
/* picker column ladder: hold 4-in-a-row only while it fits cleanly; below that go 2×2, then
   1-up. (auto-fit alone yields a 3+1 orphan in the ~880–920px band — pin 2-col through there.) */
@media(max-width:920px){ .vids{grid-template-columns:repeat(2,1fr)} }
@media(max-width:520px){ .vids{grid-template-columns:1fr} }
@media(max-width:680px){
  nav{padding:12px 16px}
  .navright{gap:8px}
  .console{margin:18px 0}
  .lane-h{flex-wrap:wrap}
  .rung{grid-template-columns:60px 1fr;gap:11px}
  .cmp-h{flex-direction:column}
  .cmp-sel{width:100%}
  .cmp-sel label{flex:1}
  .cmp-sel select{min-width:0;width:100%}
}

/* ---- mobile 3D hero: static brain ---- */
@media(max-width:820px){
  /* mobile holds a static hero pose (no camera flight), so the tall desktop runway
     would just be dead scroll — keep chapters one screen tall here */
  .brain3d-on .chapter{min-height:100svh}
  .brain3d-on .chapter,.brain3d-on .chapter[data-ch="0"]{justify-content:center;align-items:flex-end;padding-bottom:64px}
  .brain3d-on .chapter::before,.brain3d-on .chapter[data-ch="0"]::before{background:linear-gradient(0deg,rgba(0,0,0,.82) 8%,rgba(0,0,0,0) 62%)}
  .panel,.panel-hero{max-width:min(560px,92vw)}
}

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1 !important;transform:none !important}
  .herocue svg{animation:none}
}