/* ===========================================================================
   Rheme homepage — page styles on top of the design-system tokens.
   Vanilla, zero-CDN. Animations are CSS + a little JS orchestration.
   =========================================================================== */

html { scroll-behavior: smooth; }
body { overflow-x: hidden; }
* { box-sizing: border-box; }

::selection { background: var(--selection-bg); color: var(--selection-fg); }

/* annotation colors, set from data-axis/data-ax so spans are colored without JS */
[data-axis="attribution"],[data-ax="attribution"]{--c:var(--axis-attribution)}
[data-axis="modality"],[data-ax="modality"]{--c:var(--axis-modality)}
[data-axis="speech-act"],[data-ax="speech-act"]{--c:var(--axis-speech-act)}
[data-axis="negation"],[data-ax="negation"]{--c:var(--axis-negation)}
[data-axis="evidence"],[data-ax="evidence"]{--c:var(--axis-evidence)}
[data-axis="causal"],[data-ax="causal"]{--c:var(--axis-causal)}
[data-axis="sentiment"],[data-ax="sentiment"]{--c:var(--axis-sentiment)}
[data-axis="emotion"],[data-ax="emotion"]{--c:var(--axis-emotion)}
[data-axis="register"],[data-ax="register"]{--c:var(--axis-register)}
[data-axis="sense"],[data-ax="sense"]{--c:var(--axis-sense)}
[data-axis="temporal"],[data-ax="temporal"]{--c:var(--axis-temporal)}

.section { max-width: 1080px; margin: 0 auto; padding: 120px 32px; }
@media (max-width: 720px) { .section { padding: 84px 22px; } }

.rheme-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-3); }
.rh-name { color: var(--attr); }

h1, h2 { font-family: var(--font-sans); font-weight: 700; letter-spacing: -0.02em; color: var(--ink); line-height: 1.08; margin: 0; text-wrap: balance; }
em { font-style: normal; color: var(--attr); }
.lede { font-family: var(--font-sans); font-size: clamp(16px, 2.1vw, 19px); line-height: 1.65; color: var(--ink-2); max-width: 60ch; margin: 16px 0 0; }
.lede a, .ext-link { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--border-strong); transition: color var(--dur-fast), border-color var(--dur-fast); }
.lede a:hover, .ext-link:hover { color: var(--attr); border-bottom-color: var(--attr); }

/* ---------------- Buttons (juicy) ---------------- */
.btn {
  --bg: var(--attr); position: relative; display: inline-flex; align-items: center; gap: 8px;
  height: 46px; padding: 0 22px; border-radius: var(--radius-full); border: 1px solid transparent;
  font-family: var(--font-sans); font-weight: 700; font-size: 15px; letter-spacing: -0.01em;
  cursor: pointer; text-decoration: none; white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), background var(--dur-fast) var(--ease-standard), color var(--dur-fast);
}
.btn-primary { background: var(--attr); color: #fff; box-shadow: 0 1px 0 rgba(0,0,0,0.04); }
.btn-primary:hover { background: var(--attr-bright); transform: translateY(-2px); box-shadow: 0 10px 24px -8px color-mix(in srgb, var(--attr) 60%, transparent); }
.btn-primary:active { transform: translateY(0); background: var(--attr-deep); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--border-strong); }
.btn-ghost:hover { background: var(--surface); transform: translateY(-2px); }
.btn-lg { height: 54px; padding: 0 28px; font-size: 17px; }
.btn-ico { display: inline-flex; transition: transform var(--dur-base) var(--ease-out); }
.btn:hover .btn-ico { transform: translateX(3px); }
.btn-ico svg, .btn-ico i { width: 18px; height: 18px; }

/* ---------------- Nav ---------------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; gap: 24px; padding: 16px 28px;
  transition: background var(--dur-base), border-color var(--dur-base), backdrop-filter var(--dur-base), padding var(--dur-base);
  border-bottom: 1px solid transparent;
}
.nav.scrolled { background: color-mix(in srgb, var(--paper) 82%, transparent); backdrop-filter: blur(12px) saturate(1.2); border-bottom-color: var(--border); padding: 11px 28px; }
.nav-logo { text-decoration: none; }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-link { position: relative; font-family: var(--font-sans); font-weight: 500; font-size: 14px; color: var(--ink-2); text-decoration: none; padding: 8px 12px; border-radius: var(--radius-sm); transition: color var(--dur-fast); }
.nav-link::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: 5px; height: 2px; border-radius: 2px; background: var(--attr); transform: scaleX(0); transform-origin: left; transition: transform var(--dur-base) var(--ease-out); }
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link-docs { color: var(--attr); font-weight: 600; }
.nav-right { display: flex; align-items: center; }
.nav-burger { display: none; align-items: center; justify-content: center; width: 40px; height: 40px; margin-left: 8px; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); background: transparent; color: var(--ink); cursor: pointer; transition: border-color var(--dur-fast), color var(--dur-fast); }
.nav-burger:hover { color: var(--attr); border-color: color-mix(in srgb, var(--attr) 50%, var(--border-strong)); }
.nav-burger svg { width: 20px; height: 20px; }
@media (max-width: 900px) {
  .nav-burger { display: inline-flex; }
  .nav-links {
    position: absolute; top: calc(100% + 8px); left: 16px; right: 16px; margin-left: 0; z-index: 60;
    flex-direction: column; gap: 2px; padding: 10px;
    background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0; transform: translateY(-8px); pointer-events: none; visibility: hidden;
    transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out), visibility var(--dur-base);
  }
  .nav.menu-open .nav-links { opacity: 1; transform: none; pointer-events: auto; visibility: visible; }
  .nav-link { padding: 13px 14px; font-size: 16px; border-radius: var(--radius-md); }
  .nav-link::after { display: none; }
  .nav-link:hover { background: var(--surface); }
}

/* ---------------- Theme toggle ---------------- */
.theme-toggle { display: inline-flex; gap: 2px; padding: 3px; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-full); }
.tt-btn { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; border: none; border-radius: var(--radius-full); background: transparent; color: var(--ink-3); cursor: pointer; transition: background var(--dur-fast), color var(--dur-fast), transform var(--dur-fast); }
.tt-btn:hover { color: var(--ink); transform: translateY(-1px); }
.tt-btn[aria-checked="true"] { background: var(--attr); color: #fff; }
.tt-btn svg { width: 15px; height: 15px; }

/* ---------------- Hero ---------------- */
.hero { position: relative; min-height: 100svh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 120px 24px 80px; overflow: hidden; }
.hero-aura { position: absolute; inset: -20% 0 auto 0; height: 80%; pointer-events: none; z-index: 0;
  background:
    radial-gradient(46% 40% at 50% 30%, color-mix(in srgb, var(--attr) 14%, transparent), transparent 70%),
    radial-gradient(30% 30% at 72% 18%, color-mix(in srgb, var(--axis-evidence) 10%, transparent), transparent 70%),
    radial-gradient(30% 30% at 26% 22%, color-mix(in srgb, var(--axis-modality) 9%, transparent), transparent 70%);
  filter: blur(6px); opacity: 0.9;
}
.hero-inner { position: relative; z-index: 1; max-width: 880px; }
.hero-spacer-top { height: 48px; }
.hero-eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 28px; animation: rise 0.7s var(--ease-out) 0.1s both; }
.hero-eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--runtime-live); box-shadow: 0 0 0 4px color-mix(in srgb, var(--runtime-live) 22%, transparent); animation: pulse 2.4s ease-in-out infinite; }

.hero-stage { position: relative; z-index: 1; max-width: 880px; }
.hero-line { font-family: var(--font-mono); font-weight: 400; font-size: clamp(22px, 4.6vw, 42px); line-height: 1.5; color: var(--ink); margin: 0; letter-spacing: -0.01em; }
.hero-line .w { opacity: 1; }
.hero-stage-foot { display: flex; align-items: baseline; justify-content: center; gap: 14px 22px; margin-top: 20px; flex-wrap: wrap; }
.hero-cite { font-family: var(--font-mono); font-style: normal; font-size: clamp(11px, 1.3vw, 13px); letter-spacing: 0.02em; color: var(--ink-4); text-align: center; margin: 0 auto; }
.hero-cite-sep { color: var(--border-strong); margin: 0 0.18em; }
.hero-cite-name { color: var(--attr); }
.hero-cite-yr { color: var(--ink-4); }
.hero-cite-title { font-style: italic; color: var(--ink-3); text-decoration: none; border-bottom: 1px solid var(--border-strong); transition: color var(--dur-fast), border-color var(--dur-fast); }
.hero-cite-title:hover { color: var(--attr); border-bottom-color: var(--attr); }

/* annotation token: lit by default (axis-colored, drawn underline); JS adds
   .dormant to play the draw-in, so a frozen/no-JS context still shows it lit */
.tok { position: relative; border-radius: 3px; transition: color var(--dur-base) var(--ease-standard), background-size var(--dur-span) var(--ease-out); background-image: linear-gradient(var(--c, var(--attr)), var(--c, var(--attr))); background-repeat: no-repeat; background-position: 0 100%; background-size: 100% 2px; padding-bottom: 3px; cursor: default; color: var(--c, var(--ink)); }
.tok.dormant { color: var(--ink); background-size: 0% 2px; }
.tok:hover { background-color: color-mix(in srgb, var(--c) 12%, transparent); }

.hero-readout { display: inline-flex; align-items: center; gap: 10px; margin-top: 26px; padding: 8px 16px; border-radius: var(--radius-full); background: var(--surface); border: 1px solid var(--border); font-family: var(--font-mono); font-size: 13px; color: var(--ink-2); }
.hero-readout.show { opacity: 1; transform: none; }
.ro-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--runtime-live); box-shadow: 0 0 0 4px color-mix(in srgb, var(--runtime-live) 20%, transparent); animation: pulse 2.4s ease-in-out infinite; }
.ro-num, .ro-spans { color: var(--ink); font-weight: 700; }
.ro-unit { color: var(--ink-3); margin-left: -4px; }
.ro-sep { color: var(--ink-4); }
.ro-det { color: var(--runtime-live); }

.hero-head { font-size: clamp(40px, 8vw, 84px); margin: 18px 0 0; }
.hero-sub { font-family: var(--font-sans); font-size: clamp(16px, 2.3vw, 20px); line-height: 1.6; color: var(--ink-2); max-width: 52ch; margin: 34px auto 0; }
.hero-cta { display: flex; gap: 12px; justify-content: center; margin-top: 56px; flex-wrap: wrap; }
.hero-pitch { display: flex; align-items: center; justify-content: center; text-align: center; min-height: 86svh; padding: 60px 24px 110px; }
.hero-pitch-inner { position: relative; z-index: 1; max-width: 880px; }
.hero-replay { display: inline-flex; align-items: center; gap: 6px; background: none; border: none; color: var(--ink-4); font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; cursor: pointer; padding: 0; transition: color var(--dur-fast); }
.hero-replay:hover { color: var(--attr); }
.hero-replay:hover svg { transform: rotate(-40deg); }
.hero-replay svg { width: 13px; height: 13px; transition: transform var(--dur-base) var(--ease-out); }

.scroll-cue { display: none; }

/* ---------------- Section heads ---------------- */
.section-head { max-width: 720px; }
.section-head .rheme-label { display: block; margin-bottom: 16px; }
.section-head h2 { font-size: clamp(30px, 5vw, 50px); }
.section-head.head-right { margin-left: auto; text-align: right; }
.section-head.head-right .lede { margin-left: auto; }

/* ---------------- Axes explorer ---------------- */
.axes-grid { display: grid; grid-template-columns: 1.55fr 1fr; gap: 44px; margin-top: 52px; align-items: start; }
@media (max-width: 860px) { .axes-grid { grid-template-columns: 1fr; gap: 30px; } }
.axes-sentence p { font-family: var(--font-mono); font-size: clamp(18px, 2.5vw, 24px); line-height: 2.05; color: var(--ink-2); margin: 0; }
.axes-sentence .xtok { cursor: pointer; }
.xtok { position: relative; border-radius: 3px; padding-bottom: 3px; background-image: linear-gradient(var(--c), var(--c)); background-repeat: no-repeat; background-position: 0 100%; background-size: 0% 2px; transition: color var(--dur-base), background-size var(--dur-span) var(--ease-out), background-color var(--dur-fast); }
.xtok.on { color: var(--c); background-size: 100% 2px; }
.xtok.dim { opacity: 1; }
.axes-legend { display: flex; flex-wrap: wrap; gap: 8px; }
.axis-chip { display: inline-flex; align-items: center; gap: 7px; padding: 7px 12px 7px 10px; border-radius: var(--radius-full); border: 1px solid var(--border); background: var(--surface); font-family: var(--font-mono); font-size: 12px; color: var(--ink-2); cursor: pointer; transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast), background var(--dur-fast), box-shadow var(--dur-fast); }
.axis-chip .dot { width: 9px; height: 9px; border-radius: 3px; background: var(--c); transition: transform var(--dur-fast) var(--ease-out); }
.axis-chip .ct { color: var(--ink-4); }
.axis-chip:hover, .axis-chip.active { transform: translateY(-2px); border-color: color-mix(in srgb, var(--c) 55%, var(--border)); box-shadow: 0 6px 16px -10px var(--c); color: var(--ink); }
.axis-chip:hover .dot, .axis-chip.active .dot { transform: scale(1.25); }

/* ---------------- Orthogonality / astrolabe ---------------- */
.ortho-stage { display: flex; flex-direction: column; align-items: center; gap: clamp(20px, 3vw, 34px); margin-top: 48px; }
.astro-figure { position: relative; margin: 0; width: 100%; max-width: 560px; }
.astro-figure canvas { display: block; width: 100%; height: clamp(300px, 56vw, 500px); cursor: grab; }
.astro-figure canvas:active { cursor: grabbing; }
.astro-hint { position: absolute; left: 50%; bottom: 6px; transform: translateX(-50%); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-4); pointer-events: none; }
.ortho-axes { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; max-width: 720px; }
.ortho-axis-btn { display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border-radius: var(--radius-full); border: 1px solid var(--border); background: var(--surface); font-family: var(--font-mono); font-size: 13px; color: var(--ink-2); cursor: pointer; transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast), color var(--dur-fast), background var(--dur-fast); }
.ortho-axis-btn .oa-dot { width: 9px; height: 9px; border-radius: 3px; background: var(--c); transition: transform var(--dur-fast); }
.ortho-axis-btn .oa-perp { color: var(--ink-4); font-size: 12px; }
.ortho-axis-btn:hover { transform: translateY(-2px); color: var(--ink); border-color: color-mix(in srgb, var(--c) 50%, var(--border)); }
.ortho-axis-btn[aria-pressed="true"] { color: var(--c); border-color: color-mix(in srgb, var(--c) 60%, var(--border)); background: color-mix(in srgb, var(--c) 9%, var(--surface)); }
.ortho-axis-btn[aria-pressed="true"] .oa-dot { transform: scale(1.3); }
.ortho-axis-btn[aria-pressed="true"] .oa-perp { color: var(--c); }
.ortho-caption { font-family: var(--font-sans); font-size: clamp(15px, 1.8vw, 17px); line-height: 1.65; color: var(--ink-2); margin: 0 auto; max-width: 58ch; text-align: center; min-height: 5em; }
.ortho-caption b { color: var(--ink); font-weight: 700; }
.ortho-caption i { font-style: italic; color: var(--ink); }


/* ---------------- Speed ---------------- */
.speed-card { margin-top: 52px; border-radius: var(--radius-xl); background: var(--surface); border: 1px solid var(--border); padding: 36px; overflow: hidden; position: relative; }
.speed-stats { display: flex; gap: 44px; flex-wrap: wrap; margin-bottom: 28px; }
.stat-n { font-family: var(--font-mono); font-size: clamp(30px, 5vw, 46px); font-weight: 700; color: var(--ink); letter-spacing: -0.02em; }
.stat-l { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); letter-spacing: 0.04em; margin-top: 4px; }
.speed-chart { width: 100%; }
.speed-chart svg { display: block; width: 100%; height: auto; }
.room3d { width: 100%; height: clamp(300px, 44vw, 430px); perspective: 1300px; perspective-origin: 50% 40%; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.room-box { position: relative; width: 460px; height: 300px; transform-style: preserve-3d; transform: rotateX(10deg) rotateY(-21deg); will-change: transform; }
.rface { position: absolute; top: 50%; left: 50%; backface-visibility: visible; }
.r-back  { width: 460px; height: 300px; transform: translate(-50%,-50%) rotateY(180deg) translateZ(200px);
  background: linear-gradient(165deg, color-mix(in srgb, var(--paper) 90%, var(--ink)), color-mix(in srgb, var(--paper) 78%, var(--ink))); }
.r-left  { width: 400px; height: 300px; transform: translate(-50%,-50%) rotateY(-90deg) translateZ(230px);
  background: linear-gradient(90deg, color-mix(in srgb, var(--paper) 72%, var(--ink)), color-mix(in srgb, var(--paper) 84%, var(--ink))); }
.r-right { width: 400px; height: 300px; transform: translate(-50%,-50%) rotateY(90deg) translateZ(230px);
  background: linear-gradient(90deg, color-mix(in srgb, var(--paper) 86%, var(--ink)), color-mix(in srgb, var(--paper) 70%, var(--ink))); }
.r-ceil  { width: 460px; height: 426px; transform: translate(-50%,-50%) rotateX(90deg) translateZ(150px);
  background: color-mix(in srgb, var(--paper) 97%, var(--ink)); }
.r-floor { width: 460px; height: 426px; transform: translate(-50%,-50%) rotateX(-90deg) translateZ(150px); overflow: hidden;
  background: linear-gradient(180deg, color-mix(in srgb, var(--paper) 84%, var(--ink)), color-mix(in srgb, var(--paper) 75%, var(--ink))); }

/* the window, cut into the back wall */
.r-window { position: absolute; left: 50%; top: 40%; transform: translate(-50%,-50%); width: 150px; height: 120px;
  border: 8px solid #fbfaf6; border-radius: 4px; box-shadow: inset 0 0 0 1px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.15); }
.r-window .rw-sky { position: absolute; inset: 0; background: linear-gradient(180deg, #bcd9f6 0%, #dcebfb 45%, #f6eccf 100%); }
.r-window::before { content: ""; position: absolute; left: 50%; top: -8px; bottom: -8px; width: 7px; background: #fbfaf6; transform: translateX(-50%); z-index: 2; }
.r-window::after  { content: ""; position: absolute; top: 50%; left: -8px; right: -8px; height: 7px; background: #fbfaf6; transform: translateY(-50%); z-index: 2; }
.r-window .rw-glow { position: absolute; left: 50%; top: 50%; width: 360px; height: 320px; transform: translate(-50%,-50%);
  background: radial-gradient(ellipse at center, rgba(255,228,150,.5), rgba(255,228,150,0) 68%); pointer-events: none; }

/* light on the floor — a warm shaft crossing the room, with a brighter pool where it lands */
.r-floor .r-beam { position: absolute; inset: -10%; background: linear-gradient(118deg, transparent 30%, rgba(255,226,150,.5) 47%, rgba(255,234,176,.58) 53%, transparent 72%); filter: blur(8px); }
.r-floor .r-pool { position: absolute; left: 30%; top: 2%; width: 44%; height: 42%; border-radius: 50%; background: radial-gradient(ellipse at center, rgba(255,233,170,.72), rgba(255,233,170,0) 70%); filter: blur(7px); }

/* the light ray — a god-ray ramp anchored at the window and tilting down-and-
   forward toward the open front wall (the viewer). Its surface faces the camera,
   so it reads as a shaft of light with an arrowhead landing near the viewer. */
.r-ray { position: absolute; top: 50%; left: 50%; transform-style: preserve-3d; pointer-events: none;
  transform: translate(-50%,-50%) translate3d(0, -30px, -196px); }
.ray-arrow { position: absolute; left: 50%; top: 0;
  width: 132px; height: 300px;
  transform-origin: 50% 0; transform: translateX(-50%) rotateX(52deg);
  background: linear-gradient(180deg,
    rgba(255,233,166,0) 0%,
    rgba(255,233,166,.34) 26%,
    rgba(255,238,182,.6) 64%,
    rgba(255,246,210,.92) 100%);
  clip-path: polygon(40% 0, 60% 0, 60% 60%, 82% 60%, 50% 100%, 18% 60%, 40% 60%);
  filter: drop-shadow(0 0 13px rgba(255,226,150,.55));
}

.room-cap { font-family: var(--font-mono); font-size: clamp(13px, 1.6vw, 15px); line-height: 1.6; color: var(--ink-2); max-width: 60ch; margin: 22px auto 0; text-align: center; }

/* token definition section */
.token-card { margin-top: 44px; border: 1px solid var(--border); border-radius: var(--radius-xl); background: var(--surface); padding: clamp(24px, 4vw, 40px); }
.token-strip { display: flex; flex-wrap: wrap; gap: 8px; }
.tk { font-family: var(--font-mono); font-size: clamp(15px, 2vw, 19px); color: var(--ink-2); padding: 6px 12px; border-radius: var(--radius-md); background: var(--surface-2); border: 1px solid var(--border); }
.tk.on { color: var(--attr); border-color: color-mix(in srgb, var(--attr) 45%, var(--border)); background: var(--attr-wash); }
.token-note { font-family: var(--font-sans); font-size: 15px; line-height: 1.6; color: var(--ink-2); margin: 20px 0 0; max-width: 64ch; }
.tl { display: flex; flex-direction: column; gap: 16px; }
.tl-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; }
.tl-part { font-family: var(--font-sans); font-weight: 700; font-size: clamp(20px, 3vw, 30px); letter-spacing: -0.01em; color: var(--ink); line-height: 1; }
.tl-whole { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); margin-top: 6px; letter-spacing: 0.03em; }
.tl-scale { font-family: var(--font-mono); font-weight: 700; font-size: clamp(18px, 2.6vw, 28px); color: var(--attr); letter-spacing: -0.01em; white-space: nowrap; }
.tl-track { position: relative; height: 54px; border-radius: var(--radius-md); background: var(--surface-2); border: 1px solid var(--border); overflow: hidden; }
.tl-fill { position: absolute; left: 0; top: 0; bottom: 0; width: 100%; border-radius: var(--radius-md); background: linear-gradient(90deg, color-mix(in srgb, var(--attr) 88%, transparent), var(--runtime-live)); }
.tl-cap { font-family: var(--font-mono); font-size: 12.5px; line-height: 1.55; color: var(--ink-3); max-width: 64ch; }
.tl-replay { align-self: flex-start; display: inline-flex; align-items: center; gap: 6px; background: none; border: none; color: var(--ink-4); font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; cursor: pointer; padding: 0; transition: color var(--dur-fast); }
.tl-replay:hover { color: var(--attr); }
.tl-replay svg { width: 13px; height: 13px; }

/* ---------------- Games ---------------- */
.game { margin-top: 44px; border-radius: var(--radius-xl); border: 1px solid var(--border); background: var(--surface); padding: clamp(22px, 4vw, 40px); }
.game-prompt { font-family: var(--font-mono); font-size: clamp(20px, 3.2vw, 30px); line-height: 1.85; color: var(--ink); margin: 0; }
.game-word { position: relative; cursor: pointer; border-radius: 4px; padding: 2px 3px; transition: background var(--dur-fast), color var(--dur-fast), transform var(--dur-fast) var(--ease-out); }
.game-word:hover { background: var(--attr-wash); transform: translateY(-1px); }
.game-word.correct { background: color-mix(in srgb, var(--axis-attribution) 18%, transparent); color: var(--axis-attribution); }
.game-word.wrong { background: color-mix(in srgb, var(--squiggle-error) 16%, transparent); color: var(--squiggle-error); animation: shake 0.34s var(--ease-standard); }
.game-bar { display: flex; align-items: center; gap: 14px; margin-top: 26px; min-height: 30px; }
.game-feedback { font-family: var(--font-sans); font-size: 15px; color: var(--ink-2); opacity: 0; transform: translateY(4px); transition: opacity var(--dur-base), transform var(--dur-base); }
.game-feedback.show { opacity: 1; transform: none; }
.game-feedback b { color: var(--ink); }
.game-next { margin-left: auto; }
.game-score { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); letter-spacing: 0.05em; }

/* theme/rheme split game */
.split-wrap { position: relative; margin-top: 8px; }
.split-track { position: relative; border-radius: var(--radius-md); overflow: hidden; }
.split-fill { position: absolute; inset: 0; pointer-events: none; }
.split-fill .theme-fill, .split-fill .rheme-fill { position: absolute; top: 0; bottom: 0; transition: width var(--dur-base) var(--ease-out), left var(--dur-base) var(--ease-out); }
.split-fill .theme-fill { left: 0; background: color-mix(in srgb, var(--axis-modality) 14%, transparent); }
.split-fill .rheme-fill { right: 0; background: color-mix(in srgb, var(--attr) 16%, transparent); }
.split-words { position: relative; display: flex; flex-wrap: wrap; gap: 0 0.4ch; padding: 18px; font-family: var(--font-mono); font-size: clamp(18px, 2.6vw, 26px); }
.split-w { position: relative; padding: 2px 1px; cursor: pointer; border-radius: 3px; transition: color var(--dur-fast); }
.split-handle { position: absolute; top: 6px; bottom: 6px; width: 2px; background: var(--attr); border-radius: 2px; transition: left var(--dur-base) var(--ease-out); pointer-events: none; }
.split-handle::after { content: "›‹"; position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); font-family: var(--font-mono); font-size: 11px; color: #fff; background: var(--attr); border-radius: 999px; padding: 3px 5px; letter-spacing: -1px; }
.split-legend { display: flex; gap: 18px; margin-top: 16px; font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); }
.split-legend span { display: inline-flex; align-items: center; gap: 6px; }
.split-legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }

/* ---------------- Flatten demo ---------------- */
.flatten-demo { }
.flatten-toggle { position: relative; display: inline-flex; padding: 4px; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-full); }
.ftab { position: relative; z-index: 1; border: none; background: transparent; cursor: pointer; font-family: var(--font-sans); font-weight: 600; font-size: 14px; color: var(--ink-3); padding: 9px 18px; border-radius: var(--radius-full); transition: color var(--dur-base); }
.ftab[aria-pressed="true"] { color: #fff; }
.ftab-sub { font-weight: 400; opacity: 0.7; }
.ftab-glider { position: absolute; top: 4px; bottom: 4px; border-radius: var(--radius-full); background: var(--attr); transition: left var(--dur-base) var(--ease-out), width var(--dur-base) var(--ease-out), background var(--dur-base); z-index: 0; }
.flatten-para { margin-top: 30px; border-radius: var(--radius-lg); border: 1px solid var(--border); background: var(--surface); padding: clamp(22px, 4vw, 40px); }
.flatten-para p { font-family: var(--font-mono); font-size: clamp(17px, 2.4vw, 23px); line-height: 1.95; color: var(--ink-2); margin: 0; transition: filter var(--dur-slow) var(--ease-standard), letter-spacing var(--dur-slow); }
.flatten-para .xtok { background-size: 100% 2px; color: var(--c); transition: color var(--dur-slow), background-size var(--dur-slow), filter var(--dur-slow); }
.flatten-caption { font-family: var(--font-sans); font-size: 14px; color: var(--ink-3); margin-top: 20px; transition: opacity var(--dur-base); }
.flatten-demo.is-flat .flatten-para .xtok { color: var(--ink-4); background-size: 0% 2px; }
.flatten-demo.is-flat .flatten-para p { filter: blur(0.4px); letter-spacing: -0.2px; color: var(--ink-4); }

/* ---------------- Axis explorer info card ---------------- */
.info-pop { position: absolute; z-index: 60; width: 244px; padding: 13px 15px; border-radius: var(--radius-md); background: var(--surface); border: 1px solid var(--border-strong); box-shadow: var(--shadow-lg); opacity: 0; transform: translateY(6px) scale(0.97); transform-origin: top left; transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out); pointer-events: none; }
.info-pop.show { opacity: 1; transform: none; pointer-events: auto; }
.info-pop-head { display: flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 13px; color: var(--ink); text-transform: capitalize; letter-spacing: .01em; }
.info-pop-head .dot { width: 10px; height: 10px; border-radius: 3px; background: var(--c); flex: none; }
.info-pop-desc { font-family: var(--font-sans); font-size: 13px; line-height: 1.5; color: var(--ink-2); margin-top: 9px; }
.info-pop-meta { margin-top: 11px; padding-top: 10px; border-top: 1px solid var(--border); display: grid; gap: 5px; font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-3); }
.info-pop-meta .row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.info-pop-meta .row b { color: var(--ink); font-weight: 400; }
.info-pop-conf { display: inline-flex; align-items: center; gap: 7px; }
.info-pop-bar { width: 54px; height: 4px; border-radius: 2px; background: var(--surface-3); overflow: hidden; }
.info-pop-bar i { display: block; height: 100%; background: var(--c); border-radius: 2px; }

/* ---------------- Filesystem flatten/resolve ---------------- */
.flatten-layout { display: grid; grid-template-columns: 0.82fr 1.18fr; gap: 48px; margin-top: 48px; align-items: center; }
@media (max-width: 860px) { .flatten-layout { grid-template-columns: 1fr; gap: 36px; } }
.flatten-layout .flatten-demo { margin-top: 0; }
.fsviz { position: relative; height: 360px; border-radius: var(--radius-lg); border: 1px solid var(--border); background: var(--surface-2); overflow: hidden; }
@media (max-width: 860px) { .fsviz { height: 300px; } }
.fsviz-stack { position: absolute; inset: 0; }
.fsfile { position: absolute; left: 50%; top: 50%; width: min(248px, 78%); display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-radius: var(--radius-md); border: 1px solid var(--border); background: var(--paper); box-shadow: var(--shadow-sm); transform: translate(-50%, calc(-50% + var(--fy, 0px))) scale(var(--fsc, 1)); transition: transform .55s var(--ease-out), opacity .45s ease; }
.fsfile .fdot { width: 9px; height: 9px; border-radius: 3px; background: var(--c); flex: none; }
.fsfile .fname { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink); }
.fsfile .fstance { font-family: var(--font-mono); font-size: 11px; color: var(--ink-3); margin-left: auto; }
.fsflat { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: min(248px, 78%); display: flex; align-items: center; gap: 10px; padding: 13px 14px; border-radius: var(--radius-md); border: 1px dashed var(--border-strong); background: var(--surface); opacity: 0; transition: transform .55s var(--ease-out), opacity .45s ease; }
.fsflat .fdot { width: 9px; height: 9px; border-radius: 3px; background: var(--ink-4); flex: none; }
.fsflat .fname { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-2); }
.fsflat .fstance { font-family: var(--font-mono); font-size: 11px; color: var(--ink-4); margin-left: auto; }

/* ---------------- Disambiguation piece ---------------- */
.disambig { position: relative; height: 540px; margin-top: 44px; overflow: hidden; }
@media (max-width: 720px) { .disambig { height: 560px; } }
.dis-svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; }
.dis-line { stroke-width: 1.5; opacity: 0; transition: opacity var(--dur-slow) var(--ease-out); }
.dis-line.show { opacity: 0.45; }
.dis-word { position: absolute; z-index: 3; transform: translate(-50%, -50%); }
.dis-word button { font-family: var(--font-mono); font-weight: 400; font-size: clamp(34px, 6vw, 56px); letter-spacing: -0.01em; color: var(--ink); background: none; border: none; padding: 6px 12px; cursor: pointer; transition: color var(--dur-base) var(--ease-out), text-shadow var(--dur-base); }
.dis-word button:hover, .disambig.live .dis-word button { color: var(--attr); }
.dis-float { animation: dis-bob 5.5s ease-in-out infinite; }
.dis-meaning { position: absolute; z-index: 2; opacity: 0; transition: transform 0.36s var(--ease-out), opacity 0.26s ease; will-change: transform, opacity; }
.dis-label { display: inline-flex; align-items: center; gap: 7px; font-family: var(--font-mono); font-size: 14px; color: var(--c); background: color-mix(in srgb, var(--c) 12%, var(--paper)); border: 1px solid color-mix(in srgb, var(--c) 45%, var(--border)); border-radius: var(--radius-full); padding: 7px 14px; white-space: nowrap; box-shadow: var(--shadow-sm); }
.dis-label .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c); }
.dis-clue { position: absolute; z-index: 1; opacity: 0; transition: transform 0.34s var(--ease-out), opacity 0.24s ease; will-change: transform, opacity; }
.dis-clue span { font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-2); background: var(--paper); border: 1px solid var(--border); border-left: 2px solid var(--c); border-radius: var(--radius-sm); padding: 5px 9px; white-space: nowrap; box-shadow: var(--shadow-xs); }
.dis-hint { position: absolute; left: 0; right: 0; bottom: 18px; text-align: center; font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-4); transition: opacity var(--dur-base); }
.disambig.live .dis-hint { opacity: 0; }
.dis-arrow { display: block; font-size: 17px; line-height: 1; margin: 0 auto 7px; color: var(--ink-3); animation: dis-arrow-bob 1.4s ease-in-out infinite; }
@keyframes dis-arrow-bob { 0%, 100% { transform: translateY(4px); opacity: 0.45; } 50% { transform: translateY(-5px); opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .dis-arrow { animation: none; } }
.dis-reset { position: absolute; right: 14px; top: 14px; z-index: 4; display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius-full); padding: 6px 12px; cursor: pointer; opacity: 0; transform: translateY(-4px); transition: opacity var(--dur-base), transform var(--dur-base), color var(--dur-fast), border-color var(--dur-fast); }
.disambig.live .dis-reset { opacity: 1; transform: none; }
.dis-reset:hover { color: var(--attr); border-color: color-mix(in srgb, var(--attr) 45%, var(--border)); }
.dis-reset svg { width: 13px; height: 13px; }
@keyframes dis-bob { 0%, 100% { transform: translateY(-5px); } 50% { transform: translateY(5px); } }

/* ---------------- CTA + footer ---------------- */
.cta { background: var(--ink-dark); margin-top: 40px; }
.cta-inner { max-width: 900px; margin: 0 auto; text-align: center; padding: 120px 32px; }
.cta-pulse { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 24px; }
.cta-pulse .rheme-label { color: var(--on-dark-3); }
.cta-head { color: var(--on-dark); font-size: clamp(34px, 6vw, 64px); margin: 0 0 32px; }
.cta-sub { font-family: var(--font-sans); font-size: clamp(16px, 2.2vw, 19px); color: var(--on-dark-2); max-width: 48ch; margin: 18px auto 34px; line-height: 1.6; }
.foot { display: grid; grid-template-columns: 1.3fr 2fr; gap: 48px; align-items: start; max-width: 1080px; margin: 0 auto; padding: 56px 32px 64px; }
@media (max-width: 760px) { .foot { grid-template-columns: 1fr; gap: 38px; } }
.foot-brand { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.foot-tag { font-family: var(--font-mono); font-size: 13px; color: var(--ink-2); }
.foot-copy { font-family: var(--font-mono); font-size: 12px; color: var(--ink-4); }
.foot-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
@media (max-width: 520px) { .foot-cols { grid-template-columns: repeat(2, 1fr); gap: 28px 20px; } }
.foot-col { display: flex; flex-direction: column; align-items: flex-start; gap: 11px; }
.foot-h { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-4); margin-bottom: 3px; }
.foot-col a { font-family: var(--font-sans); font-size: 14px; color: var(--ink-2); text-decoration: none; transition: color var(--dur-fast); }
.foot-col a:hover { color: var(--attr); }

/* ---------------- Reveal on scroll ---------------- */
/* visible by default; JS adds .armed (hide) via rAF only when the clock runs,
   then .in reveals. Frozen / no-JS / reduced-motion => stays visible. */
.reveal.armed { opacity: 0; transform: translateY(22px); transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }
.reveal.armed.in { opacity: 1; transform: none; }

/* ---------------- Keyframes ---------------- */
@keyframes fade-up { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
@keyframes rise { from { transform: translateY(16px); } to { transform: none; } }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 4px color-mix(in srgb, var(--runtime-live) 22%, transparent); } 50% { box-shadow: 0 0 0 7px color-mix(in srgb, var(--runtime-live) 6%, transparent); } }
@keyframes scroll-dot { 0% { transform: translateY(0); opacity: 0; } 30% { opacity: 1; } 100% { transform: translateY(16px); opacity: 0; } }
@keyframes shake { 0%,100% { transform: translateX(0); } 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-eyebrow, .hero-head, .hero-sub, .hero-cta, .hero-replay { animation: none !important; opacity: 1 !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .hero-line .w { opacity: 1 !important; }
  .dis-float { animation: none !important; }
  * { scroll-behavior: auto; }
}

/* ---------------- The product law: four objects, never one score ---------------- */
.restraint .nf-demo { margin-top: 48px; }
.nf-toggle { display: inline-flex; padding: 4px; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-full); }
.nf-tab { border: none; background: transparent; cursor: pointer; font-family: var(--font-sans); font-weight: 600; font-size: 14px; color: var(--ink-3); padding: 9px 20px; border-radius: var(--radius-full); transition: color var(--dur-base), background var(--dur-base); }
.nf-tab[aria-pressed="true"] { color: #fff; background: var(--attr); }
.nf-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 28px; }
@media (max-width: 900px) { .nf-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .nf-grid { grid-template-columns: 1fr; } }
.nf-card { position: relative; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); padding: 20px 18px; display: flex; flex-direction: column; gap: 16px; transition: border-color var(--dur-base), transform var(--dur-fast) var(--ease-out); }
.nf-card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--c) 50%, var(--border)); }
.nf-sentence { font-family: var(--font-mono); font-size: 15px; line-height: 1.6; color: var(--ink); margin: 0; }
.nf-card .xtok { background-size: 100% 2px; color: var(--c); transition: color var(--dur-slow), background-size var(--dur-slow); }
.nf-obj { display: grid; gap: 7px; padding-top: 14px; border-top: 1px solid var(--border); font-family: var(--font-mono); font-size: 12px; }
.nf-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.nf-row span { color: var(--ink-4); }
.nf-row b { color: var(--ink-2); font-weight: 400; }
.nf-row b.lit { color: var(--c); }
.nf-flat { display: none; align-items: baseline; gap: 9px; padding-top: 14px; border-top: 1px dashed var(--border-strong); font-family: var(--font-mono); }
.nf-flat-n { font-size: 22px; font-weight: 700; color: var(--ink-4); letter-spacing: -0.01em; }
.nf-flat-l { font-size: 12px; color: var(--ink-4); }
.nf-cap { font-family: var(--font-sans); font-size: 15px; line-height: 1.6; color: var(--ink-3); margin: 26px 0 0; max-width: 60ch; transition: opacity var(--dur-base); }
.nf-demo.is-flat .nf-obj { display: none; }
.nf-demo.is-flat .nf-flat { display: flex; }
.nf-demo.is-flat .nf-card .xtok { color: var(--ink-4); background-size: 0% 2px; }
.nf-demo.is-flat .nf-card { border-style: dashed; }
.nf-demo.is-flat .nf-card:hover { transform: none; border-color: var(--border-strong); }

/* ===== Audit fixes: mobile 3D-room scaling + comfortable tap targets ===== */
@media (max-width: 560px) {
  .room-box { transform: scale(0.62) rotateX(10deg) rotateY(-21deg); }
}
@media (max-width: 400px) {
  .room-box { transform: scale(0.5) rotateX(10deg) rotateY(-21deg); }
}
@media (pointer: coarse) {
  .tt-btn { width: 44px; height: 44px; }
  .nav-burger { width: 44px; height: 44px; }
  .ortho-axis-btn { padding: 12px 16px; min-height: 44px; }
}