/* Keystride — one stylesheet. Themes are token sets on [data-theme]; finger
   zones share one palette across keyboard, hands and new-key cards. */

@font-face { font-family: "KS Mono"; src: url("fonts/jetbrainsmono.woff2") format("woff2"); font-weight: 100 800; font-display: swap; }
@font-face { font-family: "KS Round"; src: url("fonts/nunito.woff2") format("woff2"); font-weight: 200 1000; font-display: swap; }

:root, [data-theme="night"] {
  --bg: #0b1020; --bg2: #11182c; --card: #151d33; --card2: #1b2540; --line: #26314f; --line2: #33406a;
  --ink: #eef2ff; --ink2: #b7c0dc; --mute: #8a94b5; --accent: #7c9cff; --accent2: #b28bff; --accent-ink: #0b1020;
  --good: #34d399; --bad: #fb7185; --warn: #fbbf24; --caret: #ffd166;
  --text-todo: #6e7aa3; --text-ok: #eef2ff; --text-bad: #fb7185; --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  --glow: 0 0 0 1px rgba(124, 156, 255, .25), 0 20px 60px rgba(124, 156, 255, .18);
  --f-L5: #f472b6; --f-L4: #fb923c; --f-L3: #facc15; --f-L2: #34d399; --f-R2: #38bdf8; --f-R3: #facc15; --f-R4: #fb923c; --f-R5: #f472b6; --f-T: #a78bfa;
  color-scheme: dark;
}
[data-theme="day"] {
  --bg: #f6f7fb; --bg2: #eef1f8; --card: #ffffff; --card2: #f3f5fb; --line: #e2e6f0; --line2: #cfd6e6;
  --ink: #141a2e; --ink2: #3b4565; --mute: #6b7593; --accent: #4f6bff; --accent2: #8b5cf6; --accent-ink: #fff;
  --good: #059669; --bad: #e11d48; --warn: #d97706; --caret: #4f6bff;
  --text-todo: #9aa3bd; --text-ok: #141a2e; --text-bad: #e11d48; --shadow: 0 8px 24px rgba(20, 26, 46, .08);
  --glow: 0 0 0 1px rgba(79, 107, 255, .18), 0 18px 50px rgba(79, 107, 255, .12);
  --f-L5: #ec4899; --f-L4: #f97316; --f-L3: #eab308; --f-L2: #10b981; --f-R2: #0ea5e9; --f-R3: #eab308; --f-R4: #f97316; --f-R5: #ec4899; --f-T: #8b5cf6;
  color-scheme: light;
}
[data-theme="ocean"] {
  --bg: #04202b; --bg2: #072a38; --card: #0a3344; --card2: #0d3d51; --line: #145066; --line2: #1b6680;
  --ink: #e6fbff; --ink2: #b4e3ee; --mute: #7fb6c4; --accent: #2dd4bf; --accent2: #38bdf8; --accent-ink: #04202b;
  --good: #5eead4; --bad: #fda4af; --warn: #fde68a; --caret: #fde68a;
  --text-todo: #5f98a8; --text-ok: #e6fbff; --text-bad: #fda4af; --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  --glow: 0 0 0 1px rgba(45, 212, 191, .25), 0 20px 60px rgba(45, 212, 191, .15);
  color-scheme: dark;
}
[data-theme="candy"] {
  --bg: #fff5fb; --bg2: #ffeaf6; --card: #ffffff; --card2: #fff0f8; --line: #fbd5ea; --line2: #f5b8da;
  --ink: #3b1640; --ink2: #6b2f6e; --mute: #9b6a9b; --accent: #d946ef; --accent2: #f97316; --accent-ink: #fff;
  --good: #16a34a; --bad: #e11d48; --warn: #ea580c; --caret: #d946ef;
  --text-todo: #c49ac4; --text-ok: #3b1640; --text-bad: #e11d48; --shadow: 0 8px 24px rgba(217, 70, 239, .12);
  --glow: 0 0 0 1px rgba(217, 70, 239, .2), 0 18px 50px rgba(217, 70, 239, .15);
  color-scheme: light;
}
[data-theme="forest"] {
  --bg: #0d1a12; --bg2: #12241a; --card: #172d20; --card2: #1d3727; --line: #264733; --line2: #315c42;
  --ink: #ecfdf3; --ink2: #bfe3cc; --mute: #8bb79b; --accent: #86efac; --accent2: #fcd34d; --accent-ink: #0d1a12;
  --good: #86efac; --bad: #fca5a5; --warn: #fcd34d; --caret: #fcd34d;
  --text-todo: #6c9c7e; --text-ok: #ecfdf3; --text-bad: #fca5a5; --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  --glow: 0 0 0 1px rgba(134, 239, 172, .22), 0 20px 60px rgba(134, 239, 172, .12);
  color-scheme: dark;
}
:root { --type-font: "KS Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; --ui-font: "KS Round", ui-rounded, system-ui, -apple-system, "Segoe UI", sans-serif; --r: 16px; }
[data-font="rounded"] { --type-font: "KS Round", ui-rounded, system-ui, sans-serif; }
[data-font="serif"] { --type-font: Georgia, "Iowan Old Style", "Times New Roman", serif; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 600 16px/1.5 var(--ui-font); min-height: 100dvh; overflow-x: hidden;
  background-image: radial-gradient(1200px 600px at 80% -10%, color-mix(in srgb, var(--accent2) 12%, transparent), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 60%); background-attachment: fixed; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.15; margin: 0 0 .4em; font-weight: 900; letter-spacing: -.01em; }
h1 { font-size: clamp(28px, 4vw, 42px); }
h2 { font-size: clamp(22px, 2.6vw, 28px); }
h3 { font-size: 18px; }
p { margin: 0 0 .8em; }
kbd { font: 700 12px var(--type-font); border: 1px solid var(--line2); border-bottom-width: 3px; border-radius: 6px; padding: 1px 6px; background: var(--card2); color: var(--ink2); margin: 0 2px; }
kbd.big { font-size: 20px; padding: 4px 12px; }
.muted { color: var(--mute); }
.small { font-size: 13px; }
.center { text-align: center; }
.hide-sm { display: inline; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 8px; z-index: 50; background: var(--card); padding: 8px 12px; border-radius: 8px; }
.skip:focus { left: 8px; }

/* -------------------------------------------------------- crawler copy */
.seo { max-width: 760px; margin: 0 auto; padding: 48px 20px; font-weight: 500; }
.seo-brand { font-weight: 900; font-size: 20px; color: var(--ink); }
.seo dt { font-weight: 800; margin-top: 12px; }
.seo dd { margin: 4px 0 0; color: var(--ink2); }
.seo-boot { color: var(--mute); }

/* -------------------------------------------------------- chrome */
.topbar { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 18px; padding: 10px clamp(16px, 3vw, 32px);
  background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 900; font-size: 20px; color: var(--ink); letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand-mark { display: inline-flex; gap: 3px; padding: 6px; border-radius: 10px; background: linear-gradient(135deg, var(--accent), var(--accent2)); }
.brand-mark i { width: 7px; height: 14px; border-radius: 3px; background: var(--accent-ink); opacity: .85; }
.brand-mark i:nth-child(2) { height: 18px; margin-top: -2px; }
.mainnav { display: flex; gap: 4px; flex: 1; }
.mainnav a { padding: 8px 14px; border-radius: 999px; color: var(--ink2); font-weight: 800; }
.mainnav a:hover { background: var(--card); text-decoration: none; color: var(--ink); }
.mainnav a.on { background: var(--card2); color: var(--ink); box-shadow: inset 0 0 0 1px var(--line2); }
.me { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px; background: var(--card); border: 1px solid var(--line); color: var(--ink); font-weight: 800; }
.chip:hover { text-decoration: none; border-color: var(--line2); }
.lvl-bar { width: 44px; height: 6px; border-radius: 9px; background: var(--line); overflow: hidden; }
.lvl-bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent2)); }
.avatar { width: 36px; height: 36px; border-radius: 50%; overflow: hidden; display: grid; place-items: center; background: var(--card2); border: 2px solid var(--line2); color: var(--ink); font-weight: 900; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.tabbar { display: none; }
.page { max-width: 1120px; margin: 0 auto; padding: clamp(20px, 3vw, 40px) clamp(16px, 3vw, 32px) 40px; outline: none; }
.foot-wrap { max-width: 1120px; margin: 0 auto; padding: 0 clamp(16px, 3vw, 32px) 24px; }
.foot { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; align-items: center; margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--mute); font-size: 14px; }
.foot a { color: var(--mute); }
.inline { display: inline; margin: 0; }
.linkish { background: none; border: 0; color: var(--mute); font: inherit; cursor: pointer; padding: 0; }
.narrow { max-width: 720px; margin: 0 auto; }
.back { display: inline-block; margin-bottom: 14px; color: var(--mute); font-weight: 800; }
.eyebrow { text-transform: uppercase; letter-spacing: .14em; font-size: 12px; font-weight: 900; color: var(--accent); margin-bottom: 8px; }

/* -------------------------------------------------------- building blocks */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: clamp(16px, 2.4vw, 24px); box-shadow: var(--shadow); margin-bottom: 18px; }
.card.center { text-align: center; }
.card.glow { box-shadow: var(--glow); }
.card.notice { padding: 14px 18px; background: var(--card2); }
.card.warn { border-color: var(--warn); }
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.stack > * + * { margin-top: 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 11px 20px; border-radius: 12px; border: 1px solid var(--line2); background: var(--card2);
  color: var(--ink); font: 800 15px var(--ui-font); cursor: pointer; transition: transform .08s, box-shadow .15s, background .15s; text-decoration: none; }
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: var(--accent-ink); border: 0; box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 35%, transparent); }
.btn.ghost { background: transparent; }
.btn.small { padding: 7px 12px; font-size: 13px; border-radius: 10px; }
.btn.big { padding: 15px 28px; font-size: 18px; border-radius: 14px; }
.btn.big kbd { background: rgba(255, 255, 255, .25); border-color: rgba(0, 0, 0, .15); color: inherit; }
.btn.danger { background: transparent; color: var(--bad); border-color: var(--bad); }
.btn.google { background: #fff; color: #1f1f1f; border: 1px solid #dadce0; }
.btn.google .g { font-weight: 900; color: #4285f4; font-size: 16px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 14px; }
.seg { display: inline-flex; flex-wrap: wrap; gap: 4px; padding: 4px; border-radius: 12px; background: var(--bg2); border: 1px solid var(--line); }
.seg button { border: 0; background: transparent; color: var(--ink2); padding: 7px 12px; border-radius: 9px; font: 800 14px var(--ui-font); cursor: pointer; }
.seg button:hover { color: var(--ink); }
.seg button.on { background: var(--card2); color: var(--ink); box-shadow: inset 0 0 0 1px var(--line2); }
.seg.small button { padding: 5px 10px; font-size: 13px; }
.chip-btn { border: 1px solid var(--line2); background: var(--card); color: var(--ink2); border-radius: 999px; padding: 8px 16px; font: 800 15px var(--ui-font); cursor: pointer; }
.chip-btn.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.tag { display: inline-block; font-size: 11px; font-weight: 900; text-transform: uppercase; letter-spacing: .08em; padding: 3px 8px; border-radius: 999px; background: var(--card2); color: var(--ink2); border: 1px solid var(--line2); margin-left: 6px; }
.tag.free { color: var(--good); border-color: color-mix(in srgb, var(--good) 50%, transparent); }
.stars { display: inline-flex; gap: 1px; font-size: 15px; letter-spacing: 0; }
.star { color: var(--line2); }
.star.on { color: #fbbf24; text-shadow: 0 0 10px rgba(251, 191, 36, .45); }
.input { width: 100%; padding: 11px 14px; border-radius: 12px; border: 1px solid var(--line2); background: var(--bg2); color: var(--ink); font: 700 15px var(--ui-font); }
.field { display: grid; gap: 6px; }
.label { font-weight: 800; color: var(--ink2); margin: 14px 0 6px; }
.toggle { display: flex; gap: 14px; align-items: flex-start; cursor: pointer; }
.toggle input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.toggle .switch { flex: none; width: 46px; height: 26px; border-radius: 99px; background: var(--line2); position: relative; transition: background .2s; margin-top: 2px; }
.toggle .switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: #fff; transition: transform .2s; }
.toggle input:checked + .switch { background: var(--accent); }
.toggle input:checked + .switch::after { transform: translateX(20px); }
.toggle input:focus-visible + .switch { outline: 3px solid var(--accent); outline-offset: 2px; }
.toggle small { display: block; font-weight: 600; }
.meter { display: block; height: 8px; border-radius: 99px; background: var(--line); overflow: hidden; }
.meter i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent2)); border-radius: 99px; transition: width .6s; }
.meter.big { height: 14px; }
.signin-card { text-align: center; background: linear-gradient(160deg, var(--card), var(--card2)); }
.signin-icon { font-size: 34px; }
.pop { animation: pop .45s cubic-bezier(.2, 1.4, .4, 1); }
@keyframes pop { from { transform: scale(.85); opacity: 0; } to { transform: none; opacity: 1; } }

/* -------------------------------------------------------- home */
.hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: 36px; align-items: center; margin: 12px 0 34px; }
.hero h1 { font-size: clamp(36px, 5.6vw, 64px); letter-spacing: -.03em; }
.grad { background: linear-gradient(120deg, var(--accent), var(--accent2) 60%, #f472b6); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { font-size: 19px; color: var(--ink2); max-width: 34ch; font-weight: 600; }
.hero-who { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.track-pick { display: flex; gap: 8px; }
.try-label { font-weight: 900; color: var(--ink2); margin-bottom: 10px; }
.try-out { min-height: 22px; margin-top: 10px; color: var(--mute); font-weight: 800; }
.try-result p { margin-top: 10px; }
.welcome { display: flex; justify-content: space-between; align-items: center; gap: 18px; flex-wrap: wrap; }
.welcome-left { display: flex; align-items: center; gap: 18px; }
.welcome .actions { margin: 0; }
.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 10px 0 28px; }
.tile { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 20px; color: var(--ink); box-shadow: var(--shadow); transition: transform .15s, border-color .15s; position: relative; overflow: hidden; }
.tile::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--tc, var(--accent)); }
.tile.c1 { --tc: var(--f-R2); } .tile.c2 { --tc: var(--f-L5); } .tile.c3 { --tc: var(--f-L2); } .tile.c4 { --tc: var(--f-T); }
.tile:hover { transform: translateY(-3px); text-decoration: none; border-color: var(--tc); }
.tile p { color: var(--ink2); font-weight: 600; flex: 1; }
.tile-icon { font-size: 30px; margin-bottom: 6px; }
.tile-go { color: var(--tc); font-weight: 900; }
.how { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 28px; }
.step { padding: 6px 4px; }
.step-n { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--card2); border: 1px solid var(--line2); font-weight: 900; margin-bottom: 8px; color: var(--accent); }
.path-preview { margin-bottom: 28px; }
.path-row { display: flex; gap: 10px; overflow-x: auto; padding: 4px 2px 12px; scroll-snap-type: x mandatory; }
.path-chip { flex: none; scroll-snap-align: start; display: grid; gap: 2px; min-width: 132px; padding: 14px; border-radius: 14px; background: var(--card); border: 1px solid var(--line); border-top: 4px solid var(--c); color: var(--ink); }
.path-chip:hover { text-decoration: none; border-color: var(--c); }
.pc-emoji { font-size: 24px; }
.path-chip small { color: var(--mute); }
.bench-bars { display: grid; gap: 10px; margin: 12px 0; }
.bench-row { display: grid; grid-template-columns: 120px 1fr 70px; gap: 12px; align-items: center; }
.bench-bar { height: 12px; border-radius: 99px; background: var(--line); overflow: hidden; }
.bench-bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--f-L2), var(--f-R2), var(--f-T)); border-radius: 99px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px 18px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 900; }
.faq details p { margin: 10px 0 0; color: var(--ink2); font-weight: 600; }

/* -------------------------------------------------------- learn */
.learn-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; margin-bottom: 20px; }
.learn-tools { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.levels { display: grid; gap: 18px; }
.level { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 18px; position: relative; box-shadow: var(--shadow); scroll-margin-top: 90px; }
.level::before { content: ""; position: absolute; left: 0; top: 18px; bottom: 18px; width: 5px; border-radius: 0 6px 6px 0; background: var(--c); }
.level.locked { opacity: .72; }
.level header { display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: center; margin-bottom: 14px; }
.level header h2 { margin: 0; }
.level header p { margin: 2px 0 0; font-weight: 600; }
.level header small { color: var(--c); font-weight: 900; text-transform: uppercase; letter-spacing: .1em; }
.level-emoji { font-size: 34px; width: 58px; height: 58px; display: grid; place-items: center; border-radius: 16px; background: color-mix(in srgb, var(--c) 18%, var(--card2)); }
.level-meter { display: grid; gap: 6px; justify-items: end; min-width: 90px; }
.level-meter .meter { width: 90px; }
.level-meter .meter i { background: var(--c); }
.level.complete .level-meter b { color: var(--good); font-size: 22px; }
.lessons { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 10px; }
.lesson { width: 100%; display: grid; grid-template-columns: 38px 1fr; grid-template-rows: auto auto; gap: 2px 12px; align-items: center; text-align: left; padding: 12px; border-radius: 14px;
  border: 1px solid var(--line); background: var(--bg2); color: var(--ink); font: inherit; cursor: pointer; transition: transform .12s, border-color .12s; }
.lesson:hover { text-decoration: none; border-color: var(--c); transform: translateY(-1px); }
.lesson.locked { cursor: pointer; color: var(--mute); }
.lesson.current { border-color: var(--c); box-shadow: 0 0 0 3px color-mix(in srgb, var(--c) 25%, transparent); }
.lesson-n { grid-row: span 2; width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; background: var(--card2); font-weight: 900; }
.lesson.passed .lesson-n { background: var(--c); color: #0b1020; }
.lesson-body b { display: block; }
.lesson-body small { color: var(--mute); font-weight: 700; font-size: 12px; }
.lesson-meta { grid-column: 2; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; min-height: 6px; }
.lesson-meta .tag { margin: 0; }
.lesson.checkpoint { border-style: dashed; }

/* -------------------------------------------------------- lesson intro */
.lesson-intro { max-width: 760px; margin: 0 auto; text-align: center; border-top: 5px solid var(--c); }
.lesson-intro .back { float: left; }
.lesson-intro .eyebrow { clear: both; color: var(--c); }
.newkeys { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; margin: 18px 0; }
.newkey { display: grid; gap: 6px; justify-items: center; }
.newkey b { width: 76px; height: 76px; display: grid; place-items: center; border-radius: 16px; font: 800 34px var(--type-font); background: var(--card2); border: 2px solid var(--fc, var(--line2)); border-bottom-width: 6px; color: var(--ink); animation: pop .5s; }
.newkey small { color: var(--mute); font-weight: 800; max-width: 110px; }
.tip { color: var(--ink2); font-weight: 600; }
.tip.big { font-size: 18px; max-width: 54ch; margin: 0 auto 14px; }
.goal { font-weight: 800; color: var(--mute); }

/* -------------------------------------------------------- session */
.session { max-width: 980px; margin: 0 auto; }
.session-head { text-align: center; margin-bottom: 14px; }
.session-head h1 { font-size: clamp(24px, 3vw, 32px); }
.session-head .tip { color: var(--mute); font-size: 14px; font-weight: 700; }
.livebar { display: flex; align-items: center; gap: 22px; padding: 12px 18px; border-radius: 14px; background: var(--card); border: 1px solid var(--line); margin-bottom: 14px; flex-wrap: wrap; }
.stat { display: flex; align-items: baseline; gap: 6px; }
.stat b { font: 800 26px var(--type-font); color: var(--ink); min-width: 2ch; text-align: right; font-variant-numeric: tabular-nums; }
.stat span { color: var(--mute); font-weight: 800; font-size: 13px; }
.progress { flex: 1; min-width: 120px; height: 8px; border-radius: 99px; background: var(--line); overflow: hidden; }
.progress i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent2)); transition: width .2s linear; }
.typer { position: relative; padding: 26px 28px 38px; border-radius: 20px; background: var(--card); border: 1px solid var(--line); cursor: text; box-shadow: var(--shadow); }
.typer.blurred:not(.done) .typer-veil { opacity: 1; pointer-events: auto; }
.typer.blurred.running:not(.done) .typer-viewport { filter: blur(3px); }
.typer-input { position: absolute; opacity: 0; left: 0; top: 0; width: 1px; height: 1px; border: 0; padding: 0; resize: none; font-size: 16px; }
.typer-viewport { position: relative; overflow: hidden; --lh: 1.75em; height: calc(var(--lh) * 3); font: 500 26px/1.75 var(--type-font); transition: filter .2s; }
.typer.size-lg .typer-viewport { font-size: 34px; }
.typer.size-md .typer-viewport { font-size: 26px; }
.typer-text { position: relative; transition: transform .18s ease; color: var(--text-todo); word-break: keep-all; }
.typer .w { display: inline-block; white-space: pre; }
.typer .c { position: relative; transition: color .06s; }
.typer .c.ok { color: var(--text-ok); }
.typer .c.bad { color: var(--text-bad); text-decoration: underline wavy color-mix(in srgb, var(--text-bad) 60%, transparent); text-underline-offset: 6px; }
.typer .c.sp.bad { background: color-mix(in srgb, var(--text-bad) 30%, transparent); border-radius: 4px; text-decoration: none; }
.typer .c.miss { animation: miss .25s; }
@keyframes miss { 0%, 100% { background: transparent; } 40% { background: color-mix(in srgb, var(--text-bad) 35%, transparent); } }
.caret { position: absolute; left: 0; top: 0; width: 3px; border-radius: 3px; background: var(--caret); box-shadow: 0 0 12px var(--caret); transition: transform .09s ease-out; animation: blink 1.1s steps(1) infinite; }
.typer.running .caret { animation: none; }
.typer.done .caret { opacity: 0; }
@keyframes blink { 50% { opacity: 0; } }
.typer-veil { position: absolute; inset: 0; display: grid; place-items: center; border-radius: 20px; background: color-mix(in srgb, var(--card) 55%, transparent); opacity: 0; pointer-events: none; transition: opacity .2s; font-weight: 900; z-index: 2; }
.typer-veil span { padding: 10px 18px; border-radius: 99px; background: var(--card2); border: 1px solid var(--line2); }
.typer-hint { position: absolute; left: 28px; bottom: 10px; color: var(--mute); font-size: 13px; font-weight: 800; transition: opacity .3s; }
.typer-hint.gone { opacity: 0; }
.typer.shake { animation: shake .18s; }
@keyframes shake { 25% { transform: translateX(-3px); } 75% { transform: translateX(3px); } }
.quote-by { text-align: right; color: var(--mute); font-style: italic; margin-top: 8px; }
.keys-help { text-align: center; margin-top: 14px; font-size: 13px; }
.mobile-note { display: none; text-align: center; color: var(--mute); font-size: 13px; }

/* keyboard */
.kb-zone { margin-top: 18px; display: grid; justify-items: center; gap: 10px; }
.finger-hint { min-height: 22px; font-weight: 800; color: var(--ink2); }
.kb-wrap { display: grid; justify-items: center; gap: 6px; width: 100%; }
.kb { display: grid; gap: 6px; width: min(100%, 820px); padding: 12px; border-radius: 18px; background: var(--bg2); border: 1px solid var(--line); }
.kb-row { display: flex; gap: 6px; }
.kb-key { flex: 1 1 0; min-width: 0; height: 46px; border-radius: 10px; display: grid; place-items: center; position: relative; font: 700 15px var(--type-font); color: var(--ink2);
  background: color-mix(in srgb, var(--fc, var(--line2)) 14%, var(--card)); border: 1px solid color-mix(in srgb, var(--fc, var(--line2)) 30%, var(--line)); border-bottom-width: 3px; transition: transform .06s, background .1s; }
.kb-key small { position: absolute; top: 3px; left: 6px; font-size: 10px; color: var(--mute); }
.kb-key.mod span { font-size: 11px; color: var(--mute); text-transform: lowercase; }
.kb-key.bump::after { content: ""; position: absolute; bottom: 8px; width: 12px; height: 2px; border-radius: 2px; background: var(--ink2); opacity: .6; }
.kb-key.next { background: var(--fc, var(--accent)); color: #0b1020; transform: translateY(-2px); box-shadow: 0 6px 18px color-mix(in srgb, var(--fc, var(--accent)) 50%, transparent); }
.kb-key.next span, .kb-key.next small { color: #0b1020; }
.kb-key.next-shift { background: color-mix(in srgb, var(--fc) 55%, var(--card)); color: #0b1020; }
.kb-key.hit { animation: hit .2s; }
.kb-key.bad { animation: badkey .3s; }
@keyframes hit { 50% { transform: translateY(2px); } }
@keyframes badkey { 30% { background: var(--bad); } }
.f-L5 { --fc: var(--f-L5); } .f-L4 { --fc: var(--f-L4); } .f-L3 { --fc: var(--f-L3); } .f-L2 { --fc: var(--f-L2); }
.f-R2 { --fc: var(--f-R2); } .f-R3 { --fc: var(--f-R3); } .f-R4 { --fc: var(--f-R4); } .f-R5 { --fc: var(--f-R5); } .f-T { --fc: var(--f-T); }
.hands-wrap { width: min(100%, 440px); }
.hands { width: 100%; height: auto; display: block; }
.hands .palm { fill: var(--card2); stroke: var(--line2); }
.hands .finger { fill: color-mix(in srgb, var(--fc) 22%, var(--card2)); stroke: color-mix(in srgb, var(--fc) 45%, var(--line)); stroke-width: 1.5; transition: fill .12s, transform .12s; }
.hands .finger.lit { fill: var(--fc); filter: drop-shadow(0 0 8px var(--fc)); }
.hands .finger.lit2 { fill: color-mix(in srgb, var(--fc) 60%, var(--card2)); }

/* results */
.results { animation: pop .4s; outline: none; }
.verdict { text-align: center; padding: 10px 0 6px; }
.verdict h2 { font-size: clamp(26px, 3.4vw, 38px); }
.verdict p { color: var(--ink2); }
.big-stars .stars { font-size: 46px; gap: 6px; }
.big-stars .star.on { animation: starpop .5s backwards; }
.big-stars .star:nth-child(2) { animation-delay: .1s; } .big-stars .star:nth-child(3) { animation-delay: .2s; } .big-stars .star:nth-child(4) { animation-delay: .3s; } .big-stars .star:nth-child(5) { animation-delay: .4s; }
@keyframes starpop { from { transform: scale(0) rotate(-40deg); } 70% { transform: scale(1.3); } }
.xp-gain { text-align: center; color: var(--good); font-weight: 900; margin-bottom: 10px; }
.bignums { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; margin: 14px 0 18px; }
.bignums.mini { grid-template-columns: repeat(2, auto); justify-content: start; gap: 28px; }
.bignum { display: grid; gap: 2px; padding: 14px; border-radius: 14px; background: var(--card); border: 1px solid var(--line); text-align: center; }
.bignums.mini .bignum { background: none; border: 0; padding: 0; text-align: left; }
.bignum b { font: 800 30px var(--type-font); color: var(--ink); font-variant-numeric: tabular-nums; }
.bignum:first-child b { color: var(--accent); }
.bignum span { color: var(--mute); font-weight: 800; font-size: 13px; }
.slow-keys { display: flex; flex-wrap: wrap; gap: 10px; }
.slow-key { display: grid; justify-items: center; padding: 10px 14px; border-radius: 12px; background: var(--bg2); border: 1px solid var(--line); min-width: 72px; }
.slow-key b { font: 800 24px var(--type-font); }
.slow-key span { font-weight: 800; }
.slow-key small { color: var(--mute); }
.badge-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* charts */
.chart-wrap { position: relative; }
.chart { width: 100%; height: auto; display: block; overflow: visible; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .axis { fill: var(--mute); font: 700 11px var(--ui-font); }
.chart .line { fill: none; stroke-width: 3; stroke-linejoin: round; stroke-linecap: round; }
.chart .line.main { stroke: var(--accent); }
.chart .line.raw { stroke: var(--mute); stroke-width: 1.5; opacity: .55; }
.chart .line.acc { stroke: var(--good); stroke-width: 1.5; stroke-dasharray: 4 4; opacity: .8; }
.chart .area { fill: color-mix(in srgb, var(--accent) 14%, transparent); }
.chart .err-dot { fill: var(--bad); opacity: .85; }
.chart .dot { fill: var(--accent2); opacity: .55; }
.chart .dot.k-test { fill: var(--f-L5); } .chart .dot.k-lesson { fill: var(--f-R2); } .chart .dot.k-practice { fill: var(--f-L2); }
.legend { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 8px; font-size: 13px; color: var(--mute); font-weight: 800; }
.lg::before { content: ""; display: inline-block; width: 14px; height: 4px; border-radius: 2px; margin-right: 6px; vertical-align: middle; background: var(--accent); }
.lg.raw::before { background: var(--mute); } .lg.err::before { background: var(--bad); width: 8px; height: 8px; border-radius: 50%; } .lg.acc::before { background: var(--good); } .lg.dotlg::before { background: var(--accent2); width: 8px; height: 8px; border-radius: 50%; }
.chart-tip { position: absolute; transform: translate(-50%, -130%); pointer-events: none; background: var(--ink); color: var(--bg); padding: 6px 10px; border-radius: 8px; font-size: 12px; font-weight: 700; white-space: nowrap; opacity: 0; transition: opacity .1s; }
.chart-tip.on { opacity: 1; }
.empty-chart { padding: 30px; text-align: center; color: var(--mute); border: 1px dashed var(--line2); border-radius: 12px; }
.calendar { width: 100%; height: auto; max-height: 160px; }
.calendar .cal, .cal-sw { fill: var(--line); }
.calendar .cal.l1 { fill: color-mix(in srgb, var(--good) 30%, var(--line)); } .calendar .cal.l2 { fill: color-mix(in srgb, var(--good) 55%, var(--line)); }
.calendar .cal.l3 { fill: color-mix(in srgb, var(--good) 80%, var(--line)); } .calendar .cal.l4 { fill: var(--good); }
.calendar .axis { fill: var(--mute); font: 700 10px var(--ui-font); }
.cal-legend { display: flex; gap: 4px; align-items: center; justify-content: flex-end; font-size: 12px; color: var(--mute); }
.cal-sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; background: var(--line); }
.cal-sw.l1 { background: color-mix(in srgb, var(--good) 30%, var(--line)); } .cal-sw.l2 { background: color-mix(in srgb, var(--good) 55%, var(--line)); } .cal-sw.l3 { background: color-mix(in srgb, var(--good) 80%, var(--line)); } .cal-sw.l4 { background: var(--good); }
.heatmap { display: grid; gap: 6px; overflow-x: auto; padding-bottom: 6px; }
.hm-row { display: flex; gap: 6px; }
.hm-key { flex: none; width: 52px; height: 52px; border-radius: 10px; display: grid; place-items: center; align-content: center; background: var(--bg2); border: 1px solid var(--line); }
.hm-key b { font: 800 16px var(--type-font); }
.hm-key small { font-size: 11px; font-weight: 800; opacity: .85; }
.hm-key.g0 { background: color-mix(in srgb, var(--bad) 60%, var(--card)); } .hm-key.g1 { background: color-mix(in srgb, var(--warn) 50%, var(--card)); }
.hm-key.g2 { background: color-mix(in srgb, var(--warn) 25%, var(--card)); } .hm-key.g3 { background: color-mix(in srgb, var(--good) 30%, var(--card)); } .hm-key.g4 { background: color-mix(in srgb, var(--good) 60%, var(--card)); }
.ring { position: relative; display: grid; place-items: center; flex: none; }
.ring svg { position: absolute; inset: 0; }
.ring-bg { fill: none; stroke: var(--line); stroke-width: 7; }
.ring-fg { fill: none; stroke: var(--good); stroke-width: 7; stroke-linecap: round; transition: stroke-dasharray .8s; }
.ring span { font-weight: 900; font-size: 13px; }

/* -------------------------------------------------------- test + practice */
.test-bar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: center; margin-bottom: 18px; }
.test-group { display: flex; align-items: center; gap: 6px; }
.pb { color: var(--warn); font-weight: 900; font-size: 14px; }
.practice-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.letters { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0; }
.lt { width: 36px; height: 40px; display: grid; place-items: center; border-radius: 10px; font: 800 18px var(--type-font); border: 1px solid var(--line); background: var(--bg2); color: var(--mute); }
.lt.on { color: var(--ink); background: var(--card2); border-color: var(--line2); }
.lt.ready { border-color: var(--good); box-shadow: inset 0 -3px 0 var(--good); }
.lt.focus { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.lt.off { opacity: .45; }
.focus-letter { font: 800 18px var(--type-font); color: var(--accent); }
.custom-text { width: 100%; min-height: 140px; border-radius: 12px; border: 1px solid var(--line2); background: var(--bg2); color: var(--ink); padding: 14px; font: 500 16px/1.6 var(--type-font); resize: vertical; }

/* -------------------------------------------------------- games */
.games-head { margin-bottom: 18px; }
.game-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.game-card { background: var(--card); border: 1px solid var(--line); border-radius: 22px; padding: 24px; box-shadow: var(--shadow); position: relative; overflow: hidden; }
.game-card.g-rain { background: linear-gradient(170deg, color-mix(in srgb, var(--f-R2) 18%, var(--card)), var(--card) 60%); }
.game-card.g-pop { background: linear-gradient(170deg, color-mix(in srgb, var(--f-L5) 18%, var(--card)), var(--card) 60%); }
.game-art { font-size: 64px; line-height: 1; margin-bottom: 10px; animation: float 3s ease-in-out infinite; display: inline-block; }
@keyframes float { 50% { transform: translateY(-8px); } }
.game-card p { color: var(--ink2); font-weight: 600; }
.game-top { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 12px; }
.game-top h1 { margin: 0; }
.game-top .back { margin: 0; }
.game { position: relative; border-radius: 22px; overflow: hidden; border: 1px solid var(--line); background: linear-gradient(180deg, var(--bg2), var(--card)); box-shadow: var(--shadow); }
.hud { display: flex; gap: 20px; align-items: center; padding: 12px 18px; border-bottom: 1px solid var(--line); font-weight: 800; color: var(--ink2); flex-wrap: wrap; background: var(--card); }
.hud b { color: var(--ink); font-family: var(--type-font); }
.lives .lost { opacity: .35; }
.combo { color: var(--warn); }
.combo.dim { opacity: 0; }
.arena { position: relative; height: min(62vh, 560px); overflow: hidden; }
.arena.rain { background: radial-gradient(600px 300px at 50% 0, color-mix(in srgb, var(--f-R2) 18%, transparent), transparent), linear-gradient(transparent 85%, color-mix(in srgb, var(--f-L2) 22%, transparent)); }
.arena.pop { background: radial-gradient(600px 300px at 50% 100%, color-mix(in srgb, var(--f-L5) 18%, transparent), transparent); }
.arena.hurt { animation: hurt .35s; }
@keyframes hurt { 30% { box-shadow: inset 0 0 0 6px var(--bad); } }
.drop { position: absolute; left: 0; top: 0; padding: 6px 12px; border-radius: 12px; background: var(--card); border: 1px solid var(--line2); font: 700 22px var(--type-font); color: var(--ink); box-shadow: var(--shadow); will-change: transform; white-space: nowrap; }
.drop.target { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 35%, transparent); }
.drop span.hit { color: var(--good); }
.bubble { position: absolute; left: 0; top: 0; width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; font: 800 28px var(--type-font); color: var(--ink);
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, .6), color-mix(in srgb, var(--f-T) 35%, transparent) 40%, color-mix(in srgb, var(--f-R2) 30%, transparent)); border: 2px solid color-mix(in srgb, var(--f-R2) 60%, transparent); will-change: transform; }
.zapped { animation: zap .38s forwards; }
@keyframes zap { to { opacity: 0; filter: blur(4px); scale: 1.6; } }
.landed { animation: landed .38s forwards; }
@keyframes landed { to { opacity: 0; translate: 0 20px; } }
.points { position: absolute; left: 0; top: 0; font-weight: 900; color: var(--warn); pointer-events: none; animation: rise .7s forwards; }
@keyframes rise { to { opacity: 0; translate: 0 -40px; } }
.levelup { position: absolute; inset: 40% 0 auto; text-align: center; font-size: 42px; font-weight: 900; color: var(--accent); animation: pop .5s, fade 1.2s forwards; pointer-events: none; }
@keyframes fade { 70% { opacity: 1; } to { opacity: 0; } }
.buffer { position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%); min-width: 120px; min-height: 40px; padding: 6px 16px; border-radius: 12px; background: var(--card); border: 1px solid var(--line2); font: 800 22px var(--type-font); text-align: center; color: var(--good); }
.arena.pop ~ .buffer { display: none; }
.buffer.bad { animation: badkey .3s; }
.buffer:empty::before { content: "type…"; color: var(--mute); font-weight: 600; }
.arena-veil { position: absolute; inset: 0; display: grid; place-items: center; background: color-mix(in srgb, var(--bg) 60%, transparent); backdrop-filter: blur(3px); transition: opacity .2s; text-align: center; }
.arena-veil > div { display: grid; gap: 8px; }
.arena-veil b { font-size: 40px; }
.arena-veil span { font-weight: 800; color: var(--ink2); }
.arena-veil.gone { opacity: 0; pointer-events: none; }
.gameover { text-align: center; }
.gameover .bignums { grid-template-columns: repeat(3, 1fr); }

/* -------------------------------------------------------- stats */
.stats-head, .lb-head { margin-bottom: 16px; }
.rank-card { display: grid; grid-template-columns: auto 1fr auto; gap: 18px; align-items: center; }
.rank-emoji { font-size: 54px; width: 84px; height: 84px; display: grid; place-items: center; border-radius: 22px; background: var(--card2); }
.rank-card h2 { margin: 0; }
.rank-card p { margin: 4px 0 0; }
.rank-side { display: grid; justify-items: center; gap: 4px; }
.tiles-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 18px; }
.tile-stat { padding: 16px; border-radius: 14px; background: var(--card); border: 1px solid var(--line); display: grid; gap: 2px; }
.tile-stat small { color: var(--mute); font-weight: 800; text-transform: uppercase; letter-spacing: .08em; font-size: 11px; }
.tile-stat b { font: 800 24px var(--type-font); }
.tile-stat span { font-size: 12px; font-weight: 700; }
.pb-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; margin-bottom: 12px; }
.pb-cell { padding: 12px; border-radius: 12px; background: var(--bg2); border: 1px solid var(--line); display: grid; }
.pb-cell small { color: var(--mute); font-weight: 800; }
.pb-cell b { font: 800 22px var(--type-font); }
.pb-cell span { font-size: 12px; }
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th { text-align: left; color: var(--mute); font-weight: 800; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; padding: 8px 10px; border-bottom: 1px solid var(--line); }
.table td { padding: 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.table tr.me td { background: color-mix(in srgb, var(--accent) 12%, transparent); }
.table.lb td:first-child { font-weight: 900; width: 48px; font-size: 18px; }
.lb-controls { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.join { display: grid; grid-template-columns: 1fr minmax(160px, 240px) auto; gap: 12px; align-items: center; }
.join p { margin: 0; }

/* -------------------------------------------------------- badges + certificate */
.level-card { display: flex; gap: 20px; align-items: center; }
.lv-big { display: grid; justify-items: center; width: 96px; height: 96px; place-content: center; border-radius: 24px; background: linear-gradient(135deg, var(--accent), var(--accent2)); color: var(--accent-ink); }
.lv-big b { font-size: 40px; line-height: 1; }
.lv-big small { font-weight: 900; text-transform: uppercase; font-size: 11px; letter-spacing: .1em; }
.lv-body { flex: 1; }
.ranks { display: flex; gap: 8px; flex-wrap: wrap; }
.rank { display: grid; justify-items: center; padding: 10px 12px; border-radius: 12px; background: var(--bg2); border: 1px solid var(--line); min-width: 92px; opacity: .55; }
.rank span { font-size: 26px; }
.rank small { color: var(--mute); font-size: 11px; }
.rank.got { opacity: 1; }
.rank.cur { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); }
.badge-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; }
.badge { display: grid; justify-items: center; text-align: center; gap: 4px; padding: 16px 12px; border-radius: 16px; background: var(--card); border: 1px solid var(--line); }
.badge.locked { opacity: .55; filter: grayscale(.6); }
.badge.earned { border-color: color-mix(in srgb, var(--warn) 55%, var(--line)); box-shadow: 0 0 0 1px color-mix(in srgb, var(--warn) 25%, transparent); }
.b-emoji { font-size: 34px; }
.badge small { color: var(--mute); font-weight: 700; font-size: 12px; }
.certificate { max-width: 900px; margin: 18px auto; background: #fffdf6; color: #2a2414; border-radius: 10px; padding: 18px; box-shadow: var(--shadow); }
.cert-border { border: 3px double #b08d3c; border-radius: 6px; padding: clamp(24px, 5vw, 56px); text-align: center; font-family: Georgia, "Times New Roman", serif; }
.cert-mark { font: 900 22px var(--ui-font); color: #6b4f12; margin-bottom: 16px; }
.cert-small { text-transform: uppercase; letter-spacing: .2em; font-size: 13px; color: #7a6a44; }
.cert-name { font-size: clamp(34px, 6vw, 56px); font-family: Georgia, serif; font-style: italic; margin: 10px 0 18px; color: #2a2414; }
.cert-score { display: grid; justify-items: center; margin: 8px 0 10px; }
.cert-score b { font: 900 72px var(--ui-font); color: #8a5b00; line-height: 1; }
.cert-rank { font-weight: 700; color: #6b4f12; }
.cert-foot { display: flex; justify-content: space-between; margin-top: 34px; padding-top: 14px; border-top: 1px solid #d9c79a; font-size: 14px; color: #7a6a44; }

/* -------------------------------------------------------- overlays */
.toasts { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); display: grid; gap: 8px; z-index: 60; width: min(92vw, 460px); }
.toast { padding: 12px 18px; border-radius: 12px; background: var(--ink); color: var(--bg); font-weight: 800; box-shadow: var(--shadow); opacity: 0; transform: translateY(10px); transition: all .25s; text-align: center; }
.toast.in { opacity: 1; transform: none; }
.toast.good { background: var(--good); color: #062014; }
.toast.bad { background: var(--bad); color: #2a0610; }
.modal-wrap { position: fixed; inset: 0; z-index: 55; background: rgba(5, 8, 20, .6); display: grid; place-items: center; padding: 16px; animation: fadein .15s; }
@keyframes fadein { from { opacity: 0; } }
.modal { position: relative; width: min(100%, 460px); background: var(--card); border: 1px solid var(--line2); border-radius: 20px; padding: 26px; box-shadow: var(--shadow); animation: pop .3s; outline: none; }
.modal .card { box-shadow: none; margin: 0; border: 0; padding: 0; background: none; }
.modal-x { position: absolute; top: 10px; right: 12px; width: 34px; height: 34px; border-radius: 50%; border: 0; background: var(--card2); color: var(--ink); font-size: 20px; cursor: pointer; }
.confetti { position: fixed; inset: 0; width: 100vw; height: 100vh; pointer-events: none; z-index: 70; }

/* -------------------------------------------------------- responsive */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; }
  .tiles { grid-template-columns: 1fr 1fr; }
  .bignums { grid-template-columns: repeat(3, 1fr); }
  .tiles-stats { grid-template-columns: repeat(2, 1fr); }
  .mainnav a { padding: 8px 10px; }
}
@media (max-width: 760px) {
  .mainnav { display: none; }
  .hide-sm { display: none; }
  .tabbar { display: flex; position: fixed; bottom: 0; left: 0; right: 0; z-index: 25; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    border-top: 1px solid var(--line); padding: 6px 4px calc(6px + env(safe-area-inset-bottom)); justify-content: space-around; }
  .tabbar a { display: grid; justify-items: center; gap: 0; font-size: 11px; font-weight: 800; color: var(--mute); padding: 4px 8px; border-radius: 10px; }
  .tabbar a span { font-size: 20px; }
  .tabbar a.on { color: var(--ink); background: var(--card); }
  .tabbar a:hover { text-decoration: none; }
  body { padding-bottom: 72px; }
  .page { padding-left: 16px; padding-right: 16px; }
  .how { grid-template-columns: 1fr; }
  .game-grid { grid-template-columns: 1fr; }
  .typer { padding: 18px 16px 34px; }
  .typer-viewport, .typer.size-md .typer-viewport { font-size: 21px; }
  .typer.size-lg .typer-viewport { font-size: 25px; }
  .livebar { gap: 14px; padding: 10px 12px; }
  .stat b { font-size: 20px; }
  .kb-zone { display: none; }
  .mobile-note { display: block; }
  .level header { grid-template-columns: auto 1fr; }
  .level-meter { grid-column: 1 / -1; justify-items: start; grid-template-columns: auto 1fr; align-items: center; }
  .level-meter .meter { width: 100%; }
  .rank-card { grid-template-columns: auto 1fr; }
  .rank-side { display: none; }
  .join { grid-template-columns: 1fr; }
  .bench-row { grid-template-columns: 96px 1fr 60px; font-size: 14px; }
  .welcome { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) {
  .tiles { grid-template-columns: 1fr; }
  .bignums { grid-template-columns: repeat(2, 1fr); }
  .bignum b { font-size: 24px; }
  .gameover .bignums { grid-template-columns: repeat(2, 1fr); }
  .lessons { grid-template-columns: 1fr; }
  .brand span:last-child { font-size: 18px; }
  .chip.lvl .lvl-bar { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}
@media print {
  body { background: #fff; padding: 0; }
  .topbar, .tabbar, .foot, .no-print, .skip { display: none !important; }
  .page { padding: 0; max-width: none; }
  .certificate { box-shadow: none; margin: 0; }
}

/* -------------------------------------------------------- hand guide (lesson intro) */
.guide-box { margin: 18px auto 8px; padding: 16px; border-radius: 18px; background: var(--bg2); border: 1px solid var(--line); max-width: 860px; }
.guide-title { font-size: 20px; margin-bottom: 10px; }
.handguide-wrap { display: grid; gap: 8px; }
.handguide { width: 100%; height: auto; display: block; max-height: 380px; }
.handguide.size-lg { max-height: 440px; }
.hg-key rect { fill: color-mix(in srgb, var(--fc, var(--line2)) 12%, var(--card)); stroke: color-mix(in srgb, var(--fc, var(--line2)) 35%, var(--line)); stroke-width: 1.5; transition: fill .2s; }
.hg-key text { fill: var(--ink2); font: 700 17px var(--type-font); pointer-events: none; }
.hg-key.mod text { font-size: 12px; fill: var(--mute); }
.hg-key.hg-target rect { fill: var(--fc, var(--accent)); stroke: var(--ink); stroke-width: 2.5; }
.hg-key.hg-target text { fill: #0b1020; }
.hg-key.hg-shift rect { fill: color-mix(in srgb, var(--fc) 60%, var(--card)); }
.hg-bump { stroke: var(--ink2); stroke-width: 2.5; stroke-linecap: round; opacity: .7; }
.hg-palm { fill: color-mix(in srgb, #f5c9a8 30%, var(--card2)); stroke: color-mix(in srgb, #f5c9a8 45%, var(--line2)); stroke-width: 2; opacity: .92; }
.hg-finger { stroke: color-mix(in srgb, #f5c9a8 40%, var(--card2)); stroke-width: 20; stroke-linecap: round; opacity: .55; }
.hg-tip { fill: var(--fc); stroke: var(--card); stroke-width: 3; opacity: .85; transition: r .2s; }
.hg-tip.active { opacity: 1; filter: drop-shadow(0 0 10px var(--fc)); }
.hg-hand-label { fill: var(--mute); font: 900 13px var(--ui-font); letter-spacing: .15em; }
.hg-caption { text-align: center; font-weight: 800; color: var(--ink); min-height: 2.8em; margin: 0; font-size: 17px; }
.lesson-intro.kids .hg-caption { font-size: 20px; }
.posture { list-style: none; padding: 0; margin: 14px auto; display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; max-width: 860px; text-align: center; }
.posture li { display: grid; justify-items: center; gap: 2px; padding: 12px 8px; border-radius: 14px; background: var(--card2); border: 1px solid var(--line); }
.posture-icon { font-size: 30px; }
.posture small { color: var(--mute); font-weight: 700; font-size: 12px; }
.posture-more { max-width: 860px; margin: 6px auto 10px; text-align: left; }
.posture-more summary { cursor: pointer; font-weight: 800; color: var(--ink2); text-align: center; }
@media (max-width: 760px) {
  .posture { grid-template-columns: 1fr 1fr; }
  .guide-box { padding: 10px; }
  .hg-caption { font-size: 15px; }
}
.gameover:focus { outline: none; }