/* LangOS landing. Self-contained: no external fonts or scripts (the app's CSP allows only
 * same-origin resources). Served from /landing/. */

@font-face {
  font-family: "Inter Var";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url("/landing/fonts/inter-cyrillic-wght-normal.woff2") format("woff2-variations");
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
  font-family: "Inter Var";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url("/landing/fonts/inter-latin-wght-normal.woff2") format("woff2-variations");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304,
    U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  color-scheme: dark;
  --bg: #030407;
  --bg-2: #0a0c13;
  --panel: rgb(255 255 255 / 0.04);
  --panel-2: rgb(255 255 255 / 0.07);
  --line: rgb(255 255 255 / 0.08);
  --line-2: rgb(255 255 255 / 0.14);
  --text: #f5f5f7;
  --muted: rgb(235 235 245 / 0.6);
  --faint: rgb(235 235 245 / 0.36);
  --blue: #5b8cff;
  --violet: #9b6bff;
  --teal: #2ee6c5;
  --pink: #ff6bcb;
  --warm: #ffb44f;
  --red: #ff6b6b;
  --green: #3ddc84;
  --grad: linear-gradient(100deg, #8fb2ff 0%, #b38bff 35%, #ff8bd8 62%, #5cf0d6 100%);
  --r: 24px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --max: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter Var", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-feature-settings: "ss01", "cv11";
  line-height: 1.5;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
button { font: inherit; color: inherit; }
::selection { background: rgb(155 107 255 / 0.4); }
kbd { font: 600 11px/1 "Inter Var", sans-serif; padding: 3px 6px; border-radius: 6px; border: 1px solid var(--line-2); background: var(--panel); color: var(--muted); }

/* ── background ─────────────────────────────────────────────────────────────────────────── */
.bg { position: fixed; inset: 0; z-index: -3; pointer-events: none; overflow: hidden; }
.orb { position: absolute; width: 70vmax; height: 70vmax; border-radius: 50%; filter: blur(90px); opacity: 0.5; mix-blend-mode: screen; will-change: transform; }
.o1 { background: radial-gradient(circle, #2346ff 0%, transparent 60%); left: -20vmax; top: -30vmax; animation: drift 28s ease-in-out infinite alternate; }
.o2 { background: radial-gradient(circle, #7a2cff 0%, transparent 60%); right: -25vmax; top: -10vmax; animation: drift 34s ease-in-out -10s infinite alternate-reverse; }
.o3 { background: radial-gradient(circle, #00b39a 0%, transparent 60%); left: 10vmax; bottom: -45vmax; opacity: 0.35; animation: drift 40s ease-in-out -20s infinite alternate; }
@keyframes drift {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(8vmax, 6vmax, 0) scale(1.12); }
  100% { transform: translate3d(-6vmax, 10vmax, 0) scale(0.95); }
}
.gridlines {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgb(255 255 255 / 0.035) 1px, transparent 1px), linear-gradient(90deg, rgb(255 255 255 / 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 75%);
}
.grain {
  position: fixed; inset: -50%; z-index: -1; pointer-events: none; opacity: 0.06;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation: grain 1s steps(4) infinite;
}
@keyframes grain { 0% { transform: translate(0, 0); } 25% { transform: translate(-3%, 2%); } 50% { transform: translate(2%, -3%); } 75% { transform: translate(-2%, -1%); } }
.cursor-glow {
  position: fixed; left: 0; top: 0; width: 520px; height: 520px; margin: -260px 0 0 -260px; z-index: -1; pointer-events: none; border-radius: 50%;
  background: radial-gradient(circle, rgb(120 120 255 / 0.12), transparent 60%);
  transform: translate3d(var(--cx, -999px), var(--cy, -999px), 0);
  transition: opacity 0.4s;
}
.progress-line { position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 60; background: var(--grad); transform-origin: 0 50%; transform: scaleX(var(--p, 0)); }

/* ── buttons ────────────────────────────────────────────────────────────────────────────── */
.btn {
  --h: 40px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: var(--h); padding: 0 18px;
  border-radius: 999px; border: 0; cursor: pointer; text-decoration: none; white-space: nowrap;
  font-size: 15px; font-weight: 560; letter-spacing: -0.01em;
  transition: transform 0.35s var(--spring), background 0.25s, box-shadow 0.35s var(--ease), color 0.2s;
}
.btn:active { transform: scale(0.96); }
.btn-lg { --h: 54px; padding: 0 28px; font-size: 17px; }
.btn-block { width: 100%; }
.btn-primary { background: #fff; color: #05060a; box-shadow: 0 0 0 1px rgb(255 255 255 / 0.2), 0 10px 40px -10px rgb(155 107 255 / 0.7); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 0 1px rgb(255 255 255 / 0.4), 0 18px 60px -10px rgb(155 107 255 / 0.9); }
.btn-primary span { transition: transform 0.35s var(--spring); }
.btn-primary:hover span { transform: translateX(4px); }
.btn-ghost { background: transparent; color: var(--muted); }
.btn-ghost:hover { color: var(--text); }
.btn-glass { background: var(--panel-2); color: var(--text); box-shadow: inset 0 0 0 1px var(--line-2); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); }
.btn-glass:hover { background: rgb(255 255 255 / 0.12); transform: translateY(-2px); }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 8px; }

/* ── nav ────────────────────────────────────────────────────────────────────────────────── */
.nav {
  position: fixed; top: 12px; left: 50%; z-index: 50; transform: translateX(-50%);
  width: min(calc(100% - 24px), 1100px); height: 60px; padding: 0 10px 0 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  border-radius: 999px; transition: background 0.4s, box-shadow 0.4s, height 0.4s var(--ease);
}
.nav.scrolled { height: 54px; background: rgb(12 13 20 / 0.62); box-shadow: inset 0 0 0 1px var(--line), 0 20px 60px -20px rgb(0 0 0 / 0.8); backdrop-filter: blur(24px) saturate(160%); -webkit-backdrop-filter: blur(24px) saturate(160%); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 680; font-size: 18px; letter-spacing: -0.03em; text-decoration: none; }
.brand-mark { position: relative; width: 26px; height: 26px; border-radius: 8px; background: var(--grad); background-size: 200% 200%; animation: hue 8s linear infinite; box-shadow: 0 6px 20px -4px rgb(155 107 255 / 0.8); }
.brand-mark i { position: absolute; inset: 6px 9px 6px 7px; border-left: 3px solid #05060a; border-bottom: 3px solid #05060a; border-radius: 0 0 0 3px; }
@keyframes hue { 0% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } 100% { background-position: 0% 50%; } }
.nav-links { display: flex; gap: 4px; }
.nav-links a { padding: 8px 14px; border-radius: 999px; font-size: 14px; color: var(--muted); text-decoration: none; transition: color 0.2s, background 0.2s; }
.nav-links a:hover, .nav-links a.on { color: var(--text); background: var(--panel-2); }
.nav-actions { display: flex; align-items: center; gap: 4px; }

/* ── generic sections ───────────────────────────────────────────────────────────────────── */
main > section { position: relative; }
.sec { max-width: var(--max); margin: 0 auto; padding: clamp(96px, 14vw, 180px) var(--gutter) 0; }
.sec-head { max-width: 640px; margin-bottom: clamp(36px, 5vw, 64px); }
.sec-head.center { text-align: center; margin-inline: auto; }
.kicker { display: inline-block; margin: 0 0 18px; font-size: 13px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.title { margin: 0; font-size: clamp(38px, 6.2vw, 76px); line-height: 1.02; letter-spacing: -0.045em; font-weight: 700; }
.muted { color: var(--faint); }
.body { margin: 22px 0 0; font-size: clamp(17px, 1.6vw, 19px); color: var(--muted); letter-spacing: -0.01em; }
.grad { font-style: normal; background: var(--grad); background-size: 200% auto; -webkit-background-clip: text; background-clip: text; color: transparent; animation: hue 6s linear infinite; }
.ticks { list-style: none; padding: 0; margin: 26px 0 0; display: grid; gap: 10px; }
.ticks li { position: relative; padding-left: 30px; color: var(--muted); }
.ticks li::before { content: ""; position: absolute; left: 0; top: 3px; width: 18px; height: 18px; border-radius: 50%; background: rgb(46 230 197 / 0.15) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'><path d='M5 9.5l2.6 2.5L13 6.5' fill='none' stroke='%232ee6c5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/></svg>") center/contain no-repeat; }

.reveal { opacity: 0; transform: translateY(36px); filter: blur(8px); transition: opacity 1s var(--ease), transform 1.1s var(--ease), filter 1s var(--ease); transition-delay: var(--d, 0s); }
.reveal.in { opacity: 1; transform: none; filter: none; }

/* ── hero ───────────────────────────────────────────────────────────────────────────────── */
.hero { max-width: var(--max); margin: 0 auto; padding: clamp(130px, 18vh, 190px) var(--gutter) 40px; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 28px; padding: 7px 16px 7px 12px; border-radius: 999px; font-size: 13px; font-weight: 540; color: var(--muted); background: var(--panel); box-shadow: inset 0 0 0 1px var(--line-2); backdrop-filter: blur(12px); }
.pulse { position: relative; width: 8px; height: 8px; border-radius: 50%; background: var(--teal); }
.pulse::after { content: ""; position: absolute; inset: 0; border-radius: 50%; background: var(--teal); animation: ping 2s var(--ease) infinite; }
@keyframes ping { 0% { transform: scale(1); opacity: 0.8; } 100% { transform: scale(3.2); opacity: 0; } }
.hero-title { margin: 0 auto; font-size: clamp(46px, 10vw, 136px); line-height: 0.96; letter-spacing: -0.055em; font-weight: 760; }
.hero-title .line { display: block; overflow: hidden; padding: 0.04em 0 0.1em; }
.hero-title .line > span { display: inline-block; transform: translateY(110%) rotate(4deg); transform-origin: 0 100%; animation: rise 1.2s var(--ease) forwards; }
.hero-title .line:nth-child(2) > span { animation-delay: 0.12s; }
@keyframes rise { to { transform: none; } }
#rotator { display: inline-block; min-width: 3ch; transition: opacity 0.35s, filter 0.35s, transform 0.45s var(--ease); }
#rotator.out { opacity: 0; filter: blur(10px); transform: translateY(-0.2em); }
.lead { max-width: 680px; margin: 30px auto 0; font-size: clamp(18px, 2vw, 22px); line-height: 1.45; color: var(--muted); letter-spacing: -0.015em; }
.hero-cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 38px; }

/* stage */
.stage { position: relative; margin: clamp(56px, 8vw, 96px) auto 0; max-width: 1040px; perspective: 1600px; }
.window {
  position: relative; border-radius: 22px; overflow: hidden; text-align: left;
  background: linear-gradient(180deg, rgb(22 24 34 / 0.92), rgb(10 11 17 / 0.92));
  box-shadow: inset 0 0 0 1px var(--line-2), 0 60px 140px -40px rgb(91 140 255 / 0.45), 0 30px 80px -30px rgb(0 0 0 / 0.9);
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)); transform-style: preserve-3d;
  transition: transform 0.6s var(--ease);
}
.window::before { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; z-index: 3; background: radial-gradient(600px circle at var(--mx, 50%) var(--my, 0%), rgb(255 255 255 / 0.08), transparent 40%); }
.win-bar { display: flex; align-items: center; gap: 8px; height: 42px; padding: 0 16px; border-bottom: 1px solid var(--line); }
.win-bar i { width: 12px; height: 12px; border-radius: 50%; background: #ff5f57; }
.win-bar i:nth-child(2) { background: #febc2e; }
.win-bar i:nth-child(3) { background: #28c840; }
.win-bar span { margin: 0 auto; padding: 4px 14px; border-radius: 8px; background: var(--panel); font-size: 12px; color: var(--faint); }
.win-body { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); min-height: 420px; }
.player { display: flex; flex-direction: column; padding: 18px; border-right: 1px solid var(--line); }
.scene { position: relative; flex: 1; min-height: 260px; border-radius: 14px; overflow: hidden; background: linear-gradient(180deg, #1c1640 0%, #482a6b 45%, #f08a6a 100%); }
.sun { position: absolute; left: 50%; top: 42%; width: 120px; height: 120px; margin-left: -60px; border-radius: 50%; background: radial-gradient(circle, #ffe3a8, #ff9a6a 70%); box-shadow: 0 0 120px 40px rgb(255 160 110 / 0.45); animation: sunbob 9s ease-in-out infinite alternate; }
@keyframes sunbob { to { transform: translateY(-14px); } }
.ridge { position: absolute; left: -10%; right: -10%; bottom: 0; border-radius: 50% 50% 0 0; }
.r1 { height: 40%; background: #2a1840; transform: translateX(-12%); }
.r2 { height: 30%; background: #1a0f2c; transform: translateX(18%); }
.r3 { height: 18%; background: #0e0819; }
.caption { position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%); width: max-content; max-width: 90%; padding: 6px 12px; border-radius: 8px; background: rgb(0 0 0 / 0.62); font-size: 15px; font-weight: 500; text-align: center; transition: opacity 0.3s; }
.controls { display: flex; align-items: center; gap: 12px; margin-top: 14px; font-size: 12px; color: var(--faint); }
.pp { width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; background: var(--panel-2); font-size: 10px; color: var(--text); }
.bar { flex: 1; height: 4px; border-radius: 4px; background: var(--panel-2); overflow: hidden; }
.bar i { display: block; height: 100%; width: 40%; background: var(--grad); transition: width 0.6s linear; }
.transcript { padding: 18px 18px 18px 20px; display: flex; flex-direction: column; gap: 4px; }
.tr-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font-size: 13px; }
.chip-live { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; color: var(--teal); }
.chip-live i { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); animation: blink 1.4s infinite; }
@keyframes blink { 50% { opacity: 0.25; } }
.tl { position: relative; margin: 0; padding: 8px 10px 8px 54px; border-radius: 10px; font-size: 15px; line-height: 1.45; color: var(--faint); transition: background 0.4s, color 0.4s; }
.tl::before { content: attr(data-t); position: absolute; left: 10px; top: 10px; font-size: 11px; font-variant-numeric: tabular-nums; color: var(--faint); }
.tl.on { background: rgb(91 140 255 / 0.1); color: var(--text); box-shadow: inset 2px 0 0 var(--blue); }
.tl.on::before { color: var(--blue); }
.wd { appearance: none; border: 0; padding: 0 1px; margin: 0; background: none; font: inherit; color: inherit; cursor: pointer; border-radius: 4px; text-decoration: underline dotted rgb(155 107 255 / 0.8) 2px; text-underline-offset: 4px; transition: background 0.2s, color 0.2s; }
.wd:hover { background: rgb(155 107 255 / 0.2); color: var(--text); }
.wd.sel { background: linear-gradient(90deg, rgb(91 140 255 / 0.4), rgb(155 107 255 / 0.4)); color: #fff; text-decoration: none; }

.word-card {
  position: absolute; right: -130px; top: 40%; z-index: 5; width: 300px; padding: 20px; border-radius: 20px; text-align: left;
  background: rgb(18 19 28 / 0.78); backdrop-filter: blur(30px) saturate(170%); -webkit-backdrop-filter: blur(30px) saturate(170%);
  box-shadow: inset 0 0 0 1px var(--line-2), 0 40px 80px -20px rgb(0 0 0 / 0.8), 0 0 80px -20px rgb(155 107 255 / 0.5);
  transform: translateZ(80px); animation: floaty 7s ease-in-out infinite;
  transition: opacity 0.4s;
}
.word-card::before { content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; background: var(--grad); background-size: 200% 200%; animation: hue 5s linear infinite; mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); mask-composite: exclude; -webkit-mask-composite: xor; opacity: 0.6; pointer-events: none; }
@keyframes floaty { 0%, 100% { translate: 0 0; } 50% { translate: 0 -10px; } }
.wc-gen { display: flex; align-items: center; gap: 8px; height: 0; overflow: hidden; font-size: 12px; color: var(--violet); transition: height 0.3s var(--ease), margin 0.3s; }
.word-card.loading .wc-gen { height: 18px; margin-bottom: 10px; }
.spark { display: inline-block; animation: spin 1.6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.word-card header { display: flex; align-items: baseline; gap: 10px; }
.word-card h3 { margin: 0; font-size: 28px; letter-spacing: -0.03em; }
.pos { font-size: 12px; color: var(--faint); font-style: italic; }
.ipa { margin: 2px 0 10px; font-size: 14px; color: var(--muted); }
.tr { margin: 0 0 10px; font-size: 17px; font-weight: 560; }
.ex { margin: 0 0 12px; padding-left: 12px; border-left: 2px solid var(--violet); font-size: 13px; color: var(--muted); font-style: italic; }
.ex b { color: var(--text); font-style: normal; }
.colls { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.colls span { padding: 4px 9px; border-radius: 999px; background: var(--panel-2); font-size: 12px; color: var(--muted); }
.word-card footer { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--faint); }
.added { padding: 4px 9px; border-radius: 999px; background: rgb(61 220 132 / 0.14); color: var(--green); font-weight: 560; }
.word-card .ipa, .word-card .tr, .word-card .ex, .word-card .colls, .word-card footer, .word-card header { transition: opacity 0.4s var(--ease), transform 0.5s var(--ease), filter 0.4s; }
.word-card.loading .ipa, .word-card.loading .tr, .word-card.loading .ex, .word-card.loading .colls, .word-card.loading footer { opacity: 0; transform: translateY(8px); filter: blur(6px); }
.word-card.pop { animation: floaty 7s ease-in-out infinite, cardpop 0.6s var(--spring); }
@keyframes cardpop { 0% { scale: 0.92; } 100% { scale: 1; } }

.float { position: absolute; z-index: 4; display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-radius: 16px; font-size: 13px; color: var(--muted); background: rgb(18 19 28 / 0.72); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); box-shadow: inset 0 0 0 1px var(--line-2), 0 30px 60px -20px rgb(0 0 0 / 0.8); animation: floaty 8s ease-in-out -3s infinite; }
.float b { color: var(--text); }
.f1 { left: -46px; top: 22%; flex-direction: column; align-items: flex-start; gap: 0; }
.f1 b { font-size: 26px; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.f1 b.bump { animation: bump 0.5s var(--spring); }
@keyframes bump { 50% { transform: scale(1.18); color: var(--teal); } }
.f2 { left: 8%; bottom: -26px; animation-delay: -5s; }
.dot { width: 8px; height: 8px; border-radius: 50%; }
.dot.ok { background: var(--green); box-shadow: 0 0 12px var(--green); }
.stage-hint { margin: 48px 0 0; font-size: 13px; color: var(--faint); }

/* ── marquee ────────────────────────────────────────────────────────────────────────────── */
.marquee { margin-top: clamp(60px, 8vw, 100px); padding: 26px 0; overflow: hidden; border-block: 1px solid var(--line); mask-image: linear-gradient(90deg, transparent, #000 15%, #000 85%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 15%, #000 85%, transparent); }
.mq-track { display: flex; align-items: center; gap: 40px; width: max-content; animation: mq 40s linear infinite; }
.mq-track span { font-size: clamp(22px, 3vw, 34px); font-weight: 650; letter-spacing: -0.03em; color: var(--faint); white-space: nowrap; }
.mq-track i { font-style: normal; color: var(--violet); }
@keyframes mq { to { transform: translateX(-50%); } }

/* ── statement ──────────────────────────────────────────────────────────────────────────── */
.statement { max-width: 1100px; margin: 0 auto; padding: clamp(110px, 16vw, 200px) var(--gutter); }
.fill-text { margin: 0; font-size: clamp(30px, 4.8vw, 62px); line-height: 1.12; letter-spacing: -0.04em; font-weight: 680; }
.fill-text .fw { color: rgb(255 255 255 / 0.13); transition: color 0.25s; }
.fill-text .fw.lit { color: var(--text); }
.fill-text .fw.hot.lit { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ── story ──────────────────────────────────────────────────────────────────────────────── */
.story { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; }
.sstep { min-height: 92vh; display: flex; flex-direction: column; justify-content: center; opacity: 0.18; transition: opacity 0.6s var(--ease); }
.sstep.on { opacity: 1; }
.snum { font-size: 14px; font-weight: 600; color: var(--violet); letter-spacing: 0.1em; }
.sstep h2 { margin: 14px 0 18px; font-size: clamp(34px, 4.6vw, 60px); line-height: 1.02; letter-spacing: -0.045em; }
.sstep p { margin: 0; max-width: 440px; font-size: 18px; color: var(--muted); }
.story-sticky { position: sticky; top: 0; height: 100vh; display: grid; place-items: center; }

.phone {
  position: relative; width: 300px; height: 620px; padding: 14px; border-radius: 52px;
  background: linear-gradient(145deg, #2a2c36, #0c0d12); box-shadow: inset 0 0 0 1.5px rgb(255 255 255 / 0.16), 0 0 0 1px #000, 0 80px 120px -40px rgb(91 140 255 / 0.4), 0 40px 80px -30px #000;
}
.phone::after { content: ""; position: absolute; inset: -30%; z-index: -1; background: radial-gradient(circle, rgb(155 107 255 / 0.25), transparent 60%); filter: blur(40px); transition: background 0.8s; }
.phone[data-step="1"]::after { background: radial-gradient(circle, rgb(91 140 255 / 0.3), transparent 60%); }
.phone[data-step="2"]::after { background: radial-gradient(circle, rgb(255 107 203 / 0.25), transparent 60%); }
.phone[data-step="3"]::after { background: radial-gradient(circle, rgb(46 230 197 / 0.25), transparent 60%); }
.phone[data-step="4"]::after { background: radial-gradient(circle, rgb(255 180 79 / 0.22), transparent 60%); }
.notch { position: absolute; top: 24px; left: 50%; z-index: 3; width: 92px; height: 26px; margin-left: -46px; border-radius: 20px; background: #000; }
.screens { position: relative; height: calc(100% - 52px); border-radius: 40px 40px 0 0; overflow: hidden; background: #07080d; }
.tabbar { display: flex; justify-content: space-around; align-items: center; height: 52px; border-radius: 0 0 40px 40px; background: #0e0f16; border-top: 1px solid var(--line); }
.tabbar i { width: 20px; height: 20px; border-radius: 6px; background: var(--panel-2); transition: background 0.4s; }
.phone[data-step="0"] .tabbar i:nth-child(1), .phone[data-step="1"] .tabbar i:nth-child(1),
.phone[data-step="2"] .tabbar i:nth-child(2), .phone[data-step="3"] .tabbar i:nth-child(3),
.phone[data-step="4"] .tabbar i:nth-child(4) { background: var(--blue); }
.scr { position: absolute; inset: 0; padding: 56px 16px 16px; opacity: 0; transform: translateY(24px) scale(0.98); filter: blur(6px); transition: opacity 0.6s var(--ease), transform 0.7s var(--ease), filter 0.6s; pointer-events: none; }
.phone[data-step="0"] .s0, .phone[data-step="1"] .s1, .phone[data-step="2"] .s2, .phone[data-step="3"] .s3, .phone[data-step="4"] .s4 { opacity: 1; transform: none; filter: none; }
.scr-title { margin: 0 0 14px; font-size: 24px; font-weight: 700; letter-spacing: -0.03em; display: flex; align-items: baseline; justify-content: space-between; }
.scr-title small { font-size: 11px; font-weight: 500; color: var(--faint); }
.paste { display: flex; align-items: center; height: 40px; padding: 0 12px; margin-bottom: 14px; border-radius: 12px; background: var(--panel-2); box-shadow: inset 0 0 0 1px rgb(91 140 255 / 0.5); font-size: 12px; color: var(--muted); }
.caret { width: 1.5px; height: 16px; margin-left: 2px; background: var(--blue); animation: blink 1s steps(1) infinite; }
.src-item { display: flex; gap: 10px; align-items: center; padding: 10px; margin-bottom: 8px; border-radius: 14px; background: var(--panel); }
.src-item.new { box-shadow: inset 0 0 0 1px rgb(46 230 197 / 0.4); animation: newin 0.8s var(--spring) both 0.6s; }
@keyframes newin { from { opacity: 0; transform: translateY(-12px) scale(0.96); } }
.src-item b { display: block; font-size: 13px; }
.src-item small { font-size: 11px; color: var(--faint); }
.ico { flex: none; width: 36px; height: 36px; display: grid; place-items: center; border-radius: 10px; font-size: 10px; font-weight: 700; }
.ico.yt { background: rgb(255 80 80 / 0.18); color: #ff7070; }
.ico.pdf { background: rgb(255 180 79 / 0.18); color: var(--warm); }
.ico.txt { background: rgb(91 140 255 / 0.18); color: var(--blue); font-size: 13px; }
.ico.au { background: rgb(46 230 197 / 0.18); color: var(--teal); font-size: 16px; }
.mini-video { height: 150px; margin-bottom: 16px; border-radius: 14px; background: linear-gradient(180deg, #1c1640, #482a6b 60%, #f08a6a); }
.sub { margin: 0 0 10px; font-size: 16px; line-height: 1.5; }
.sub.dim { color: var(--faint); }
.tap { position: relative; padding: 0 2px; border-radius: 4px; background: rgb(155 107 255 / 0.35); }
.phone[data-step="1"] .tap { animation: tapflash 2.4s var(--ease) infinite; }
@keyframes tapflash { 0%, 30% { background: transparent; } 40%, 100% { background: rgb(155 107 255 / 0.45); } }
.finger { position: absolute; left: 116px; top: 248px; width: 38px; height: 38px; border-radius: 50%; background: rgb(255 255 255 / 0.3); box-shadow: 0 0 0 1px rgb(255 255 255 / 0.5); opacity: 0; }
.phone[data-step="1"] .finger { animation: finger 2.4s var(--ease) infinite; }
@keyframes finger { 0% { opacity: 0; transform: translate(40px, 60px); } 25% { opacity: 1; transform: none; } 35% { transform: scale(0.8); } 45% { transform: scale(1); opacity: 1; } 70%, 100% { opacity: 0; } }
.pcard { padding: 18px; border-radius: 20px; background: linear-gradient(160deg, rgb(155 107 255 / 0.16), rgb(91 140 255 / 0.06)); box-shadow: inset 0 0 0 1px var(--line-2); }
.pcard > b { display: block; font-size: 28px; letter-spacing: -0.03em; }
.pcard > small { color: var(--faint); font-size: 12px; }
.pcard p { margin: 12px 0; font-size: 16px; font-weight: 560; }
.pcard q { display: block; padding-left: 10px; border-left: 2px solid var(--violet); font-size: 12px; color: var(--muted); font-style: italic; quotes: none; }
.pcard q u { text-decoration-color: var(--violet); color: var(--text); }
.pc-tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 14px 0; }
.pc-tags span { padding: 3px 8px; border-radius: 999px; background: var(--panel-2); font-size: 11px; color: var(--muted); }
.pc-web { padding: 10px; border-radius: 12px; background: var(--panel); font-size: 12px; color: var(--muted); }
.pc-web small { display: block; margin-bottom: 4px; font-size: 10px; color: var(--teal); text-transform: uppercase; letter-spacing: 0.08em; }
.phone[data-step="2"] .pcard > * { animation: stag 0.7s var(--ease) both; }
.phone[data-step="2"] .pcard > :nth-child(2) { animation-delay: 0.08s; } .phone[data-step="2"] .pcard > :nth-child(3) { animation-delay: 0.16s; }
.phone[data-step="2"] .pcard > :nth-child(4) { animation-delay: 0.24s; } .phone[data-step="2"] .pcard > :nth-child(5) { animation-delay: 0.32s; }
.phone[data-step="2"] .pcard > :nth-child(6) { animation-delay: 0.4s; }
@keyframes stag { from { opacity: 0; transform: translateY(10px); filter: blur(4px); } }
.rcard { min-height: 220px; display: flex; flex-direction: column; justify-content: center; gap: 18px; padding: 20px; border-radius: 22px; background: var(--panel); box-shadow: inset 0 0 0 1px var(--line); font-size: 17px; line-height: 1.45; }
.rcard p { margin: 0; }
.rcard em { font-size: 13px; color: var(--faint); }
.gap { display: inline-block; min-width: 70px; border-bottom: 2px solid var(--violet); color: transparent; }
.rbtns { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-top: 14px; }
.rbtns span { display: grid; gap: 2px; padding: 8px 0; border-radius: 12px; background: var(--panel); text-align: center; font-size: 11px; font-weight: 560; }
.rbtns small { font-size: 10px; color: var(--faint); font-weight: 400; }
.rbtns .on { background: rgb(46 230 197 / 0.18); color: var(--teal); }
.phone[data-step="3"] .rbtns .on { animation: press 2.2s var(--ease) infinite 0.6s; }
@keyframes press { 0%, 60%, 100% { transform: none; } 70% { transform: scale(0.9); } }
.mwave { display: flex; align-items: center; gap: 3px; height: 70px; margin-bottom: 14px; padding: 0 8px; border-radius: 14px; background: var(--panel); }
.mwave i { flex: 1; height: 30%; border-radius: 2px; background: var(--warm); animation: eq 1s ease-in-out infinite alternate; }
.mwave i:nth-child(3n) { animation-delay: -0.3s; } .mwave i:nth-child(3n + 1) { animation-delay: -0.6s; } .mwave i:nth-child(4n) { animation-duration: 0.7s; }
@keyframes eq { to { height: 85%; } }
.mi { margin-bottom: 8px; padding: 12px; border-radius: 14px; background: var(--panel); font-size: 13px; box-shadow: inset 3px 0 0 var(--c); }
.mi s { color: var(--faint); }
.mi.err { --c: var(--red); } .mi.warn { --c: var(--warm); } .mi.tip { --c: var(--teal); }
.phone[data-step="4"] .mi { animation: stag 0.6s var(--ease) both; }
.phone[data-step="4"] .mi:nth-of-type(2) { animation-delay: 0.15s; } .phone[data-step="4"] .mi:nth-of-type(3) { animation-delay: 0.3s; }

/* ── content tabs ───────────────────────────────────────────────────────────────────────── */
.tabs { position: relative; display: inline-flex; gap: 2px; padding: 5px; margin-bottom: 28px; border-radius: 999px; background: var(--panel); box-shadow: inset 0 0 0 1px var(--line); max-width: 100%; overflow-x: auto; scrollbar-width: none; }
.tabs button { position: relative; z-index: 1; padding: 10px 20px; border: 0; border-radius: 999px; background: none; cursor: pointer; font-size: 15px; font-weight: 540; color: var(--muted); white-space: nowrap; transition: color 0.3s; }
.tabs button[aria-selected="true"] { color: #05060a; }
.tab-pill { position: absolute; z-index: 0; top: 5px; bottom: 5px; left: 0; border-radius: 999px; background: #fff; transition: transform 0.5s var(--spring), width 0.5s var(--spring); }
.tab-stage { position: relative; min-height: 440px; border-radius: 32px; background: linear-gradient(160deg, rgb(255 255 255 / 0.06), rgb(255 255 255 / 0.015)); box-shadow: inset 0 0 0 1px var(--line); overflow: hidden; }
.pane { position: absolute; inset: 0; display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: 40px; align-items: center; padding: clamp(24px, 4vw, 56px); opacity: 0; transform: translateX(30px); filter: blur(8px); pointer-events: none; transition: opacity 0.5s var(--ease), transform 0.7s var(--ease), filter 0.5s; }
.pane.on { position: relative; opacity: 1; transform: none; filter: none; pointer-events: auto; }
.pane-copy h3 { margin: 0 0 14px; font-size: clamp(26px, 3vw, 36px); letter-spacing: -0.035em; line-height: 1.1; }
.pane-copy p { margin: 0; color: var(--muted); font-size: 17px; }
.mini-list { list-style: none; padding: 0; margin: 22px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.mini-list li { padding: 6px 12px; border-radius: 999px; background: var(--panel-2); font-size: 13px; color: var(--muted); }
.pane-mock { position: relative; border-radius: 20px; background: rgb(8 9 14 / 0.8); box-shadow: inset 0 0 0 1px var(--line-2), 0 40px 80px -30px rgb(0 0 0 / 0.8); padding: 18px; }
.hl { font-style: normal; padding: 0 3px; border-radius: 4px; background: linear-gradient(90deg, rgb(91 140 255 / 0.4), rgb(155 107 255 / 0.4)); color: #fff; }
.pane-mock u { text-decoration: underline rgb(46 230 197 / 0.6) 2px; text-underline-offset: 4px; }
.mv-screen { height: 170px; display: grid; place-items: center; margin-bottom: 14px; border-radius: 12px; background: linear-gradient(135deg, #10243f, #3d1f5c 60%, #7a3b62); }
.mv-screen span { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 50%; background: rgb(255 255 255 / 0.18); backdrop-filter: blur(10px); }
.mv-lines p { margin: 0; padding: 7px 10px; border-radius: 8px; font-size: 14px; color: var(--faint); }
.mv-lines p.on { background: rgb(91 140 255 / 0.12); color: var(--text); }
.mv-lines b { font-weight: 500; font-size: 11px; color: var(--blue); margin-right: 8px; font-variant-numeric: tabular-nums; }
.m-pdf { padding: 26px; background: linear-gradient(160deg, #18171c, #0f0e12); }
.book { display: grid; grid-template-columns: 1fr 1fr; border-radius: 6px; overflow: hidden; box-shadow: 0 30px 60px -20px #000; transform: perspective(1200px) rotateX(8deg); }
.pg { position: relative; min-height: 270px; padding: 22px 20px 30px; background: #f4efe4; color: #2a2620; }
.pg.left { box-shadow: inset -20px 0 30px -20px rgb(0 0 0 / 0.3); }
.pg.right { box-shadow: inset 20px 0 30px -20px rgb(0 0 0 / 0.25); }
.pg i { display: block; height: 7px; margin-bottom: 11px; border-radius: 4px; background: #d8d0c0; }
.pg i.w70 { width: 70%; } .pg i.w50 { width: 50%; } .pg i.w80 { width: 80%; }
.pg p { margin: 0; font: 400 12.5px/1.6 Georgia, "Times New Roman", serif; }
.pg .hl { background: rgb(155 107 255 / 0.28); color: inherit; }
.pg u { text-decoration-color: rgb(91 140 255 / 0.7) !important; }
.pn { position: absolute; bottom: 10px; left: 0; right: 0; text-align: center; font: 10px Georgia, serif; color: #8a8270; }
.chip-float { position: absolute; right: 14px; bottom: -14px; padding: 8px 14px; border-radius: 999px; background: #fff; color: #05060a; font-size: 13px; font-weight: 600; box-shadow: 0 10px 30px -5px rgb(0 0 0 / 0.6); animation: floaty 6s ease-in-out infinite; }
.m-text { padding: 26px; }
.art-k { margin: 0; font-size: 11px; letter-spacing: 0.16em; color: var(--red); font-weight: 700; }
.art-h { margin: 6px 0 14px; font: 700 26px/1.15 Georgia, serif; letter-spacing: -0.01em; }
.m-text > p:not(.art-k):not(.art-h) { margin: 0; font: 400 16px/1.7 Georgia, serif; color: var(--muted); }
.sel { background: rgb(46 230 197 / 0.25); color: var(--text); border-radius: 3px; box-shadow: 0 0 0 2px rgb(46 230 197 / 0.25); }
.sel-pop { display: inline-grid; gap: 4px; margin-top: 18px; padding: 14px 16px; border-radius: 16px; background: rgb(24 26 36 / 0.95); box-shadow: inset 0 0 0 1px var(--line-2), 0 20px 50px -10px #000; font-size: 13px; }
.sel-pop b { font-size: 15px; }
.sel-pop span { color: var(--muted); }
.sel-pop i { font-style: normal; margin-top: 6px; color: var(--teal); font-weight: 600; }
.aw { display: flex; align-items: center; gap: 2px; height: 90px; margin-bottom: 16px; padding: 0 6px; border-radius: 12px; background: var(--panel); }
.aw i { flex: 1; border-radius: 2px; background: linear-gradient(var(--teal), var(--blue)); opacity: 0.4; }
.aw i.p { opacity: 1; }
.seg { display: flex; gap: 12px; margin-bottom: 12px; font-size: 15px; }
.seg p { margin: 0; color: var(--muted); }
.spk { flex: none; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; font-size: 12px; font-weight: 700; }
.spk.a { background: rgb(91 140 255 / 0.25); color: var(--blue); }
.spk.b { background: rgb(255 107 203 / 0.22); color: var(--pink); }

/* ── split sections ─────────────────────────────────────────────────────────────────────── */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 80px); align-items: center; }
.split .sec-head { margin-bottom: 0; }

/* vocabulary */
.vocab { position: relative; padding: 18px; border-radius: 28px; background: linear-gradient(170deg, rgb(255 255 255 / 0.07), rgb(255 255 255 / 0.02)); box-shadow: inset 0 0 0 1px var(--line-2), 0 50px 100px -40px rgb(91 140 255 / 0.4); transform: perspective(1400px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)); transition: transform 0.6s var(--ease); }
.vsearch { display: flex; align-items: center; gap: 10px; height: 52px; padding: 0 8px 0 16px; border-radius: 16px; background: rgb(0 0 0 / 0.4); box-shadow: inset 0 0 0 1px var(--line-2); }
.vsearch:focus-within { box-shadow: inset 0 0 0 1.5px var(--blue), 0 0 0 4px rgb(91 140 255 / 0.15); }
.mag { font-size: 20px; color: var(--faint); }
.vsearch input { flex: 1; min-width: 0; height: 100%; border: 0; outline: 0; background: none; color: var(--text); font: inherit; font-size: 16px; }
.vsearch input::placeholder { color: var(--faint); }
.sem { padding: 5px 10px; border-radius: 10px; font-size: 11px; font-weight: 600; color: var(--violet); background: rgb(155 107 255 / 0.15); }
.vlist { list-style: none; margin: 14px 0 0; padding: 0; min-height: 340px; }
.vlist li { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; padding: 12px 14px; margin-bottom: 6px; border-radius: 14px; background: var(--panel); animation: stag 0.5s var(--ease) both; animation-delay: calc(var(--i) * 60ms); }
.vlist b { font-size: 16px; letter-spacing: -0.01em; }
.vlist span { grid-column: 1; font-size: 13px; color: var(--muted); }
.vlist em { grid-row: 1 / span 2; grid-column: 2; align-self: center; font-style: normal; font-size: 11px; font-weight: 600; padding: 4px 8px; border-radius: 8px; }
.st-new { color: var(--blue); background: rgb(91 140 255 / 0.15); }
.st-learn { color: var(--warm); background: rgb(255 180 79 / 0.15); }
.st-known { color: var(--green); background: rgb(61 220 132 / 0.14); }
.vlist mark { background: rgb(155 107 255 / 0.35); color: #fff; border-radius: 3px; padding: 0 1px; }
.vfoot { margin: 10px 4px 0; font-size: 12px; color: var(--faint); }

/* review */
.rev .review-demo { order: 0; }
.review-demo { position: relative; padding: 22px; border-radius: 30px; background: linear-gradient(170deg, rgb(255 255 255 / 0.07), rgb(255 255 255 / 0.02)); box-shadow: inset 0 0 0 1px var(--line-2), 0 50px 100px -40px rgb(46 230 197 / 0.35); }
.rv-top { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; font-size: 13px; color: var(--faint); font-variant-numeric: tabular-nums; }
.rv-bar { flex: 1; height: 5px; border-radius: 5px; background: var(--panel-2); overflow: hidden; }
.rv-bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--teal), var(--blue)); transition: width 0.6s var(--ease); }
.streak b { color: var(--warm); }
.flash { position: relative; display: block; width: 100%; height: 280px; padding: 0; border: 0; background: none; cursor: pointer; perspective: 1400px; text-align: center; }
.fl-in { position: absolute; inset: 0; transform-style: preserve-3d; transition: transform 0.8s var(--spring); }
.flash.flipped .fl-in { transform: rotateY(180deg); }
.flash.swipe .fl-in { animation: swipe 0.5s var(--ease); }
@keyframes swipe { 0% { transform: rotateY(180deg); } 50% { transform: rotateY(180deg) translateX(-60px) rotateZ(4deg); opacity: 0; } 51% { transform: translateX(60px); opacity: 0; } 100% { transform: none; opacity: 1; } }
.fl-front, .fl-back { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; padding: 28px; border-radius: 24px; backface-visibility: hidden; -webkit-backface-visibility: hidden; background: rgb(10 11 17 / 0.9); box-shadow: inset 0 0 0 1px var(--line-2); }
.fl-back { transform: rotateY(180deg); background: linear-gradient(160deg, rgb(46 230 197 / 0.14), rgb(91 140 255 / 0.08)), rgb(10 11 17 / 0.95); }
.fl-q { font-size: clamp(18px, 2.2vw, 22px); line-height: 1.45; letter-spacing: -0.015em; max-width: 440px; }
.fl-q .gap { min-width: 90px; }
.fl-hint { min-height: 20px; font-size: 14px; color: var(--violet); }
.fl-front small, .fl-back small { font-size: 12px; color: var(--faint); }
.fl-back b { font-size: 36px; letter-spacing: -0.035em; }
.fl-back > span { font-size: 18px; color: var(--muted); }
.rates { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 14px; transition: opacity 0.3s; }
.rates.off { opacity: 0.35; pointer-events: none; }
.rates button { position: relative; display: grid; gap: 2px; padding: 12px 6px; border: 0; border-radius: 16px; background: var(--panel-2); cursor: pointer; font-size: 14px; font-weight: 600; transition: transform 0.3s var(--spring), background 0.2s; }
.rates button:hover { transform: translateY(-3px); }
.rates button:active { transform: scale(0.95); }
.rates small { font-size: 11px; font-weight: 400; color: var(--faint); }
.rates kbd { position: absolute; top: 6px; right: 6px; padding: 2px 5px; font-size: 9px; }
.rates [data-r="0"]:hover { background: rgb(255 107 107 / 0.2); }
.rates [data-r="1"]:hover { background: rgb(255 180 79 / 0.2); }
.rates [data-r="2"]:hover { background: rgb(46 230 197 / 0.2); }
.rates [data-r="3"]:hover { background: rgb(91 140 255 / 0.2); }
.rv-done { position: absolute; inset: 0; display: grid; place-content: center; gap: 8px; text-align: center; border-radius: inherit; background: rgb(6 7 11 / 0.92); backdrop-filter: blur(10px); }
.rv-done[hidden] { display: none; }
.rv-done b { font-size: 26px; letter-spacing: -0.03em; }
.rv-done span { color: var(--muted); }
.rv-done button { border: 0; background: none; color: var(--teal); cursor: pointer; font-weight: 600; text-decoration: underline; }
.curve { margin-top: 30px; padding: 18px; border-radius: 20px; background: var(--panel); box-shadow: inset 0 0 0 1px var(--line); }
.curve svg { display: block; width: 100%; height: 130px; overflow: visible; }
.curve path { fill: none; stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 1200; stroke-dashoffset: 1200; transition: stroke-dashoffset 2.4s var(--ease); }
.c-forget { stroke: rgb(255 107 107 / 0.6); stroke-dasharray: 6 6 !important; stroke-dashoffset: 0 !important; opacity: 0; transition: opacity 1s !important; }
.c-srs { stroke: url(#cg); }
.curve.in path.c-srs { stroke-dashoffset: 0; }
.curve.in .c-forget { opacity: 1; }
.curve-legend { display: flex; gap: 18px; margin-top: 10px; font-size: 12px; color: var(--faint); }
.curve-legend i { display: inline-block; width: 14px; height: 3px; margin-right: 6px; vertical-align: middle; border-radius: 2px; }
.lg-f { background: rgb(255 107 107 / 0.6); }
.lg-s { background: linear-gradient(90deg, var(--blue), var(--teal)); }

/* speaking */
.spk-stage { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 18px; padding: 18px; border-radius: 32px; background: linear-gradient(170deg, rgb(255 255 255 / 0.06), rgb(255 255 255 / 0.015)); box-shadow: inset 0 0 0 1px var(--line), 0 60px 120px -50px rgb(255 180 79 / 0.3); }
.spk-left { padding: 8px; }
.rec { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }
.rec-btn { position: relative; flex: none; width: 60px; height: 60px; border: 0; border-radius: 50%; cursor: pointer; background: rgb(255 80 80 / 0.15); box-shadow: inset 0 0 0 1.5px rgb(255 100 100 / 0.6); transition: transform 0.3s var(--spring); }
.rec-btn:hover { transform: scale(1.06); }
.rec-btn span { position: absolute; inset: 18px; border-radius: 50%; background: #ff5a5a; transition: border-radius 0.3s, inset 0.3s; }
.rec-btn::after { content: ""; position: absolute; inset: 0; border-radius: 50%; box-shadow: 0 0 0 0 rgb(255 90 90 / 0.5); }
.spk-stage.playing .rec-btn span { inset: 20px; border-radius: 4px; }
.spk-stage.playing .rec-btn::after { animation: ring 1.4s var(--ease) infinite; }
@keyframes ring { to { box-shadow: 0 0 0 18px rgb(255 90 90 / 0); } }
.rec-meta b { display: block; font-size: 16px; }
.rec-meta small { font-size: 13px; color: var(--faint); font-variant-numeric: tabular-nums; }
.wave { display: flex; align-items: center; gap: 2px; height: 74px; margin-bottom: 18px; padding: 0 10px; border-radius: 16px; background: rgb(0 0 0 / 0.3); }
.wave i { flex: 1; min-width: 1px; border-radius: 2px; background: rgb(255 255 255 / 0.16); transition: background 0.2s; }
.wave i.p { background: linear-gradient(var(--warm), var(--pink)); }
.ts { display: flex; gap: 12px; margin-bottom: 10px; padding: 10px 12px; border-radius: 14px; opacity: 0.35; transition: opacity 0.4s, background 0.4s; }
.ts.on { opacity: 1; }
.ts.me { background: rgb(91 140 255 / 0.06); }
.who { flex: none; width: 52px; font-size: 12px; font-weight: 600; color: var(--faint); padding-top: 3px; }
.ts.me .who { color: var(--blue); }
.ts p { margin: 0; font-size: 15px; line-height: 1.55; }
.ts mark { background: none; color: inherit; border-radius: 3px; transition: background 0.5s, box-shadow 0.5s; }
.spk-stage.analyzed mark.e { background: rgb(255 107 107 / 0.18); box-shadow: inset 0 -2px 0 var(--red); }
.spk-stage.analyzed mark.w { background: rgb(255 180 79 / 0.16); box-shadow: inset 0 -2px 0 var(--warm); }
.spk-stage.analyzed mark.t { background: rgb(46 230 197 / 0.14); box-shadow: inset 0 -2px 0 var(--teal); }
.spk-stage.analyzed mark.g { background: rgb(61 220 132 / 0.14); box-shadow: inset 0 -2px 0 var(--green); }
.spk-right { display: flex; flex-direction: column; gap: 10px; }
.issue { padding: 14px 16px; border-radius: 16px; background: rgb(10 11 17 / 0.7); box-shadow: inset 3px 0 0 var(--c), inset 0 0 0 1px var(--line); opacity: 0; transform: translateX(24px) scale(0.98); filter: blur(4px); transition: opacity 0.6s var(--ease), transform 0.7s var(--spring), filter 0.5s; }
.issue.show { opacity: 1; transform: none; filter: none; }
.issue.err { --c: var(--red); } .issue.warn { --c: var(--warm); } .issue.tip { --c: var(--teal); } .issue.good { --c: var(--green); }
.tag { display: inline-block; margin-bottom: 6px; font-size: 11px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--c); }
.issue p { margin: 0 0 4px; font-size: 16px; }
.issue s { color: var(--faint); }
.issue small { font-size: 13px; color: var(--muted); }
.spk-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 14px; }
.mini { padding: 22px; border-radius: 22px; background: var(--panel); box-shadow: inset 0 0 0 1px var(--line); }
.mini b { display: block; margin-bottom: 6px; font-size: 17px; letter-spacing: -0.02em; }
.mini span { font-size: 14px; color: var(--muted); }

/* progress */
.dash { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.stat { padding: 24px; border-radius: 24px; background: var(--panel); box-shadow: inset 0 0 0 1px var(--line); }
.stat b { display: block; font-size: clamp(36px, 4.4vw, 56px); letter-spacing: -0.05em; font-weight: 700; font-variant-numeric: tabular-nums; background: linear-gradient(180deg, #fff, rgb(255 255 255 / 0.55)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { font-size: 14px; color: var(--muted); }
.chart, .bars { padding: 24px; border-radius: 24px; background: var(--panel); box-shadow: inset 0 0 0 1px var(--line); }
.chart { grid-column: span 2; }
.bars { grid-column: span 2; }
.chart-h { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 16px; }
.chart-h span { font-size: 12px; color: var(--faint); }
.chart svg { display: block; width: 100%; height: 200px; overflow: visible; }
.chart .ln { fill: none; stroke-width: 3; stroke-linecap: round; stroke-dasharray: 900; stroke-dashoffset: 900; transition: stroke-dashoffset 2.2s var(--ease); }
.chart .area { opacity: 0; transition: opacity 1.4s 0.8s; }
.dash.in .ln { stroke-dashoffset: 0; }
.dash.in .area { opacity: 1; }
.brow { display: grid; grid-template-columns: 110px 1fr 76px; align-items: center; gap: 12px; margin-bottom: 18px; font-size: 14px; color: var(--muted); }
.brow i { position: relative; height: 10px; border-radius: 6px; background: var(--panel-2); overflow: hidden; }
.brow i::before, .brow i::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; border-radius: 6px; width: 0; transition: width 1.6s var(--ease); }
.brow i::before { background: rgb(255 107 107 / 0.35); }
.brow i::after { background: linear-gradient(90deg, var(--teal), var(--blue)); transition-delay: 0.6s; }
.dash.in .brow i::before { width: var(--a); }
.dash.in .brow i::after { width: var(--b); }
.brow em { font-style: normal; font-size: 12px; color: var(--faint); text-align: right; font-variant-numeric: tabular-nums; }
.fineprint { margin: 14px 4px 0; font-size: 12px; color: var(--faint); }

/* bento */
.bento { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.tile { position: relative; display: flex; flex-direction: column; justify-content: space-between; gap: 24px; min-height: 300px; padding: 28px; border-radius: 28px; overflow: hidden; background: linear-gradient(170deg, rgb(255 255 255 / 0.06), rgb(255 255 255 / 0.015)); box-shadow: inset 0 0 0 1px var(--line); transform: perspective(1200px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)); transition: transform 0.6s var(--ease), box-shadow 0.4s, opacity 1s var(--ease), filter 1s var(--ease); }
.tile::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(500px circle at var(--mx, -100%) var(--my, -100%), rgb(155 107 255 / 0.14), transparent 40%); }
.tile:hover { box-shadow: inset 0 0 0 1px var(--line-2); }
.t-wide { grid-column: span 2; flex-direction: row; align-items: center; }
.t-wide .tile-copy { flex: 1; }
.tile h3 { margin: 0 0 8px; font-size: 22px; letter-spacing: -0.03em; }
.tile p { margin: 0; font-size: 15px; color: var(--muted); }
.prompt-box { flex: 1; min-height: 150px; padding: 18px; border-radius: 18px; background: rgb(0 0 0 / 0.35); box-shadow: inset 0 0 0 1px var(--line-2); }
.prompt-box small { display: block; margin-bottom: 10px; font-size: 11px; color: var(--faint); text-transform: uppercase; letter-spacing: 0.1em; }
.prompt-box p { margin: 0; font-size: 15px; color: var(--text); font-family: ui-monospace, "SF Mono", Menlo, monospace; min-height: 4.5em; }
.prompt-box p::after { content: ""; display: inline-block; width: 8px; height: 1.1em; margin-left: 2px; vertical-align: text-bottom; background: var(--violet); animation: blink 1s steps(1) infinite; }
.levels { display: flex; gap: 6px; }
.levels span { flex: 1; padding: 14px 0; border-radius: 14px; text-align: center; font-weight: 650; background: var(--panel-2); color: var(--faint); transition: all 0.4s var(--spring); }
.levels span.on { background: var(--grad); color: #05060a; transform: translateY(-6px); box-shadow: 0 14px 30px -10px rgb(155 107 255 / 0.8); }
.theme-demo { display: flex; align-items: center; gap: 16px; padding: 0; border: 0; background: none; cursor: pointer; }
.td-screen { flex: 1; display: grid; gap: 8px; padding: 18px; border-radius: 16px; background: #0b0c12; box-shadow: inset 0 0 0 1px var(--line-2); transition: background 0.5s; }
.td-screen i { height: 8px; border-radius: 4px; background: rgb(255 255 255 / 0.18); transition: background 0.5s; }
.td-screen i.w60 { width: 60%; } .td-screen i.w40 { width: 40%; }
.td-switch { position: relative; flex: none; width: 56px; height: 32px; border-radius: 999px; background: var(--panel-2); box-shadow: inset 0 0 0 1px var(--line-2); transition: background 0.4s; }
.td-switch span { position: absolute; top: 3px; left: 3px; width: 26px; height: 26px; border-radius: 50%; background: #fff; transition: transform 0.45s var(--spring); }
.theme-demo.light .td-screen { background: #f5f5f7; }
.theme-demo.light .td-screen i { background: rgb(0 0 0 / 0.14); }
.theme-demo.light .td-switch { background: var(--blue); }
.theme-demo.light .td-switch span { transform: translateX(24px); }
.devices { position: relative; height: 120px; }
.d-lap { position: absolute; left: 0; right: 40px; bottom: 0; height: 110px; display: grid; align-content: start; gap: 8px; padding: 14px; border-radius: 12px 12px 4px 4px; background: #0b0c12; box-shadow: inset 0 0 0 1px var(--line-2); }
.d-ph { position: absolute; right: 0; bottom: -10px; width: 64px; height: 120px; display: grid; align-content: start; gap: 6px; padding: 16px 8px; border-radius: 16px; background: #0b0c12; box-shadow: inset 0 0 0 1.5px var(--line-2), 0 20px 40px -10px #000; }
.devices i { height: 7px; border-radius: 4px; background: rgb(255 255 255 / 0.15); }
.devices i.w60 { width: 60%; }
.usage { display: grid; gap: 14px; }
.usage div { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
.usage i { height: 8px; border-radius: 6px; background: var(--panel-2); position: relative; overflow: hidden; }
.usage i::after { content: ""; position: absolute; inset: 0 auto 0 0; width: 0; border-radius: 6px; background: linear-gradient(90deg, var(--violet), var(--blue)); transition: width 1.6s var(--ease) 0.3s; }
.tile.in .usage i::after { width: var(--w); }
.vault { flex: 1; display: grid; gap: 8px; }
.v-row { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-radius: 14px; background: rgb(0 0 0 / 0.3); box-shadow: inset 0 0 0 1px var(--line); font-size: 14px; }
.v-row b { font-size: 12px; color: var(--teal); }
.v-row.danger { color: var(--red); }
.sw { position: relative; width: 40px; height: 24px; border-radius: 999px; background: var(--panel-2); }
.sw.on { background: var(--green); }
.sw i { position: absolute; top: 2px; left: 2px; width: 20px; height: 20px; border-radius: 50%; background: #fff; transition: transform 0.3s; }
.sw.on i { transform: translateX(16px); }

/* faq */
.faq { max-width: 860px; }
.faq-list { display: grid; gap: 10px; }
details { border-radius: 20px; background: var(--panel); box-shadow: inset 0 0 0 1px var(--line); transition: background 0.3s; }
details[open] { background: var(--panel-2); }
summary { position: relative; padding: 22px 60px 22px 24px; cursor: pointer; list-style: none; font-size: 18px; font-weight: 580; letter-spacing: -0.015em; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 22px; top: 50%; width: 30px; height: 30px; margin-top: -15px; display: grid; place-items: center; border-radius: 50%; background: var(--panel-2); font-size: 20px; font-weight: 400; transition: transform 0.4s var(--spring); }
details[open] summary::after { transform: rotate(45deg); }
details p { margin: 0; padding: 0 24px 22px; color: var(--muted); }

/* final */
.final { padding: clamp(120px, 18vw, 220px) var(--gutter) clamp(90px, 12vw, 140px); text-align: center; }
.mega { margin: 0; font-size: clamp(52px, 11vw, 160px); line-height: 0.94; letter-spacing: -0.06em; font-weight: 780; }
.final > p { margin: 24px 0 0; font-size: 20px; color: var(--muted); }

.footer { max-width: var(--max); margin: 0 auto; padding: 28px var(--gutter) 40px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); font-size: 13px; color: var(--faint); }
.footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
.footer nav a { text-decoration: none; }
.footer nav a:hover { color: var(--text); }

/* modal */
.modal { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 16px; }
.modal[hidden] { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgb(0 0 0 / 0.6); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); animation: fade 0.3s; }
.modal-panel { position: relative; width: min(100%, 420px); padding: 32px; border-radius: 28px; background: rgb(18 19 28 / 0.92); box-shadow: inset 0 0 0 1px var(--line-2), 0 60px 120px -30px #000; animation: modalin 0.5s var(--spring); }
@keyframes fade { from { opacity: 0; } }
@keyframes modalin { from { opacity: 0; transform: translateY(20px) scale(0.96); } }
.modal-x { position: absolute; top: 14px; right: 14px; width: 36px; height: 36px; border: 0; border-radius: 50%; background: var(--panel-2); cursor: pointer; font-size: 20px; }
.modal-panel h2 { margin: 0 0 8px; font-size: 28px; letter-spacing: -0.035em; }
.modal-sub { margin: 0 0 22px; color: var(--muted); font-size: 15px; }
.modal-panel form { display: grid; gap: 14px; }
.modal-panel label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
.modal-panel input[type="text"], .modal-panel input[type="email"] { height: 48px; padding: 0 14px; border: 0; border-radius: 14px; background: rgb(0 0 0 / 0.35); box-shadow: inset 0 0 0 1px var(--line-2); color: var(--text); font: inherit; font-size: 16px; }
.modal-panel input:focus { outline: 0; box-shadow: inset 0 0 0 1.5px var(--blue); }
.modal-panel .check { display: flex; align-items: flex-start; gap: 10px; }
.modal-panel .check input { margin-top: 3px; accent-color: var(--blue); }
.modal-foot { margin: 18px 0 0; text-align: center; font-size: 14px; color: var(--faint); }
.done-ico { width: 64px; height: 64px; display: grid; place-items: center; margin-bottom: 18px; border-radius: 20px; background: var(--grad); color: #05060a; font-size: 28px; }

.touch-only { display: none; }
@media (pointer: coarse) { .kb-only { display: none; } .touch-only { display: inline; } .rates kbd { display: none; } }

/* ── responsive ─────────────────────────────────────────────────────────────────────────── */
@media (max-width: 1320px) {
  .word-card { right: -10px; }
  .f1 { left: -10px; }
}
@media (max-width: 900px) {
  .nav-links { display: none; }
  .win-body { grid-template-columns: minmax(0, 1fr); }
  .player { border-right: 0; border-bottom: 1px solid var(--line); }
  .scene { min-height: 200px; }
  .word-card { position: relative; right: auto; top: auto; width: auto; max-width: 420px; margin: -40px auto 0; transform: none; }
  .float { display: none; }
  .story { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .story-sticky { order: -1; top: 60px; height: auto; padding: 0 0 12px; z-index: 2; pointer-events: none; }
  .phone { width: 220px; height: 440px; padding: 10px; border-radius: 40px; }
  .screens { border-radius: 32px 32px 0 0; height: calc(100% - 44px); }
  .tabbar { height: 44px; border-radius: 0 0 32px 32px; }
  .notch { top: 18px; width: 70px; height: 20px; margin-left: -35px; }
  .scr { padding: 44px 12px 12px; transform-origin: top center; }
  .scr > * { zoom: 0.78; }
  .finger { display: none; }
  .sstep { min-height: 46vh; justify-content: flex-start; padding-top: 4vh; text-align: center; align-items: center; }
  .sstep:last-child { min-height: 60vh; }
  .sstep:not(.on) { opacity: 0; }
  .split { grid-template-columns: minmax(0, 1fr); }
  .rev .sec-head { order: -1; }
  .pane { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .tab-stage { min-height: 0; }
  .spk-stage { grid-template-columns: minmax(0, 1fr); }
  .spk-cards { grid-template-columns: minmax(0, 1fr); }
  .dash { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .chart, .bars { grid-column: span 2; }
  .bento { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .t-wide { flex-direction: column; align-items: stretch; }
  .t-wide .prompt-box, .t-wide .vault { flex: none; }
}
@media (max-width: 600px) {
  .nav { padding: 0 6px 0 14px; }
  .nav .btn-ghost { display: none; }
  .hero-cta .btn { width: 100%; }
  .stage-hint { margin-top: 28px; }
  .bento { grid-template-columns: minmax(0, 1fr); }
  .t-wide { grid-column: auto; }
  .tile { min-height: 0; }
  .tabs button { padding: 9px 14px; font-size: 14px; }
  .brow { grid-template-columns: 84px 1fr 64px; font-size: 13px; }
  .rates button { font-size: 13px; padding: 12px 2px; }
  .rates kbd { display: none; }
  .who { width: 40px; }
  .tl { padding-left: 46px; font-size: 14px; }
  .caption { font-size: 13px; }
  summary { font-size: 16px; padding: 18px 56px 18px 18px; }
  details p { padding: 0 18px 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001s !important; animation-iteration-count: 1 !important; transition-duration: 0.001s !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; filter: none; }
  .grain, .cursor-glow { display: none; }
}