/* Grammar App — TapToLearn (web, 2026) */
:root {
  --paper: #F6F3EB;
  --paper-2: #EEEAE0;
  --card: #FFFFFF;
  --ink: #1C2620;
  --ink-2: #4A5650;
  --muted: #7A857F;
  --line: #E3DFD4;
  --green: #2F7A3E;
  --green-ink: #215A2D;
  --green-soft: #E3F1E3;
  --amber: #F2B544;
  --amber-soft: #FDF1D6;
  --coral: #E4573D;
  --coral-soft: #FCE4DF;
  --sky: #2F6DB5;
  --sky-soft: #E1ECF8;
  --plum: #7A4FB3;
  --plum-soft: #EEE6F8;
  --radius: 18px;
  --radius-lg: 26px;
  --shadow: 0 1px 2px rgba(28,38,32,.05), 0 8px 24px rgba(28,38,32,.07);
  --shadow-lg: 0 2px 6px rgba(28,38,32,.06), 0 24px 56px rgba(28,38,32,.12);
  --display: 'Fredoka', 'Nunito', system-ui, sans-serif;
  --body: 'Nunito', system-ui, -apple-system, sans-serif;
  --book: 'Lora', Georgia, serif;
  --topbar: 64px;
  --bottombar: 0px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 17px/1.5 var(--body); min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(circle at 12% 0%, #fffdf6 0, transparent 40%);
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; -webkit-tap-highlight-color: transparent; }
h1, h2, h3, h4 { font-family: var(--display); margin: 0; line-height: 1.1; font-weight: 600; letter-spacing: -.01em; }
h1 { font-size: clamp(34px, 6vw, 56px); }
h2 { font-size: clamp(26px, 4vw, 36px); }
h3 { font-size: 22px; }
p { margin: 0; }
.muted { color: var(--muted); }
.hidden { display: none !important; }
::selection { background: var(--amber-soft); }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20; height: var(--topbar);
  display: flex; align-items: center; gap: 24px; padding: 0 20px;
  background: rgba(246,243,235,.86); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 12px; background: var(--green); color: #fff;
  font: 700 22px/38px var(--display); text-align: center; letter-spacing: 0;
  box-shadow: inset 0 -3px 0 rgba(0,0,0,.18);
}
.brand-text { font: 600 20px/1 var(--display); display: flex; flex-direction: column; }
.brand-text small { font: 600 11px/1 var(--body); color: var(--muted); margin-top: 4px; letter-spacing: .04em; text-transform: uppercase; }
.tabs { display: flex; gap: 4px; margin-left: 8px; }
.tabs a { padding: 8px 14px; border-radius: 999px; font-weight: 700; color: var(--ink-2); font-size: 15px; }
.tabs a:hover { background: var(--paper-2); }
.tabs a.active { background: var(--ink); color: #fff; }
.site-link { margin-left: auto; font-size: 13px; font-weight: 700; color: var(--muted); }
.site-link:hover { color: var(--green); }

.bottombar { display: none; }
@media (max-width: 700px) {
  :root { --bottombar: 64px; }
  .tabs, .site-link { display: none; }
  .bottombar {
    display: grid; grid-template-columns: repeat(4,1fr); position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
    height: calc(var(--bottombar) + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom);
    background: rgba(255,255,255,.92); backdrop-filter: blur(14px); border-top: 1px solid var(--line);
  }
  .bottombar a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; font-size: 11px; font-weight: 800; color: var(--muted); }
  .bottombar a .ico { font-size: 20px; }
  .bottombar a.active { color: var(--green); }
}

/* ---------- layout ---------- */
.app { max-width: 1040px; margin: 0 auto; padding: 28px 20px calc(40px + var(--bottombar)); min-height: calc(100vh - var(--topbar)); }
.screen { animation: rise .32s ease both; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.spread { justify-content: space-between; }
.stack { display: grid; gap: 14px; }
.section { margin-top: 34px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 14px; gap: 12px; }
.eyebrow { font: 800 12px/1 var(--body); letter-spacing: .12em; text-transform: uppercase; color: var(--green); }
.lede { font-size: 18px; color: var(--ink-2); max-width: 56ch; }

.crumbs { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 700; color: var(--muted); margin-bottom: 14px; flex-wrap: wrap; }
.crumbs a:hover { color: var(--green); }
.crumbs span.sep { opacity: .5; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: 999px; background: var(--ink); color: #fff; font-weight: 800; font-size: 15px;
  transition: transform .12s ease, background .15s ease, box-shadow .15s ease; white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--green); box-shadow: 0 6px 18px rgba(47,122,62,.28); }
.btn.primary:hover { background: var(--green-ink); }
.btn.ghost { background: var(--card); color: var(--ink); border: 1.5px solid var(--line); }
.btn.ghost:hover { border-color: var(--ink-2); }
.btn.amber { background: var(--amber); color: var(--ink); }
.btn.lg { padding: 16px 28px; font-size: 17px; }
.btn.sm { padding: 8px 14px; font-size: 13px; }
.btn[disabled] { opacity: .45; pointer-events: none; }
.btn.block { width: 100%; }

/* ---------- cards ---------- */
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; }
.tile {
  display: flex; flex-direction: column; gap: 10px; padding: 26px; border-radius: var(--radius-lg); background: var(--card);
  box-shadow: var(--shadow); position: relative; overflow: hidden; min-height: 190px;
  transition: transform .18s ease, box-shadow .18s ease; border: 1.5px solid transparent;
}
.tile:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.tile .big { font: 600 30px/1.05 var(--display); }
.tile .ico { font-size: 34px; line-height: 1; }
.tile .foot { margin-top: auto; font-weight: 800; font-size: 14px; display: flex; align-items: center; gap: 6px; }
.tile .foot::after { content: '→'; transition: transform .18s; }
.tile:hover .foot::after { transform: translateX(4px); }
.tile.green { background: var(--green); color: #fff; }
.tile.green .muted { color: rgba(255,255,255,.75); }
.tile.amber { background: var(--amber); }
.tile.plum { background: var(--plum-soft); }
.tile.sky { background: var(--sky-soft); }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; }
@media (max-width: 760px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

/* ---------- home ---------- */
.hero { padding: 26px 0 8px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 28px; align-items: center; }
.hero h1 { max-width: 12ch; }
.hero h1 em { font-style: normal; color: var(--green); }
.hero .lede { margin-top: 14px; }
.hero .stats { display: flex; gap: 28px; margin-top: 22px; flex-wrap: wrap; }
.stat b { font: 600 30px/1 var(--display); display: block; }
.stat span { font-size: 13px; color: var(--muted); font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }
.hero-art {
  background: var(--card); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 24px;
  font-family: var(--book); font-size: 22px; line-height: 1.5; position: relative;
}
.hero-art .pos { display: inline-block; padding: 1px 8px; border-radius: 8px; font-family: var(--body); font-size: 13px; font-weight: 800; vertical-align: middle; margin: 0 2px; }
.pos.noun { background: var(--sky-soft); color: var(--sky); }
.pos.verb { background: var(--coral-soft); color: var(--coral); }
.pos.adj  { background: var(--amber-soft); color: #9A6A0A; }
.pos.adv  { background: var(--plum-soft); color: var(--plum); }
.pos.pron { background: var(--green-soft); color: var(--green-ink); }
.pos.int  { background: var(--paper-2); color: var(--ink-2); }
.hero-art .cap { font: 700 12px/1 var(--body); color: var(--muted); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 12px; }
.hero-art .tagged { line-height: 2.1; }
.hero-art .tag { display: inline-flex; flex-direction: column; align-items: center; line-height: 1.1; vertical-align: top; margin: 0 1px; padding: 4px 8px 3px; border-radius: 10px; }
.hero-art .tag small { font: 800 10px/1 var(--body); letter-spacing: .06em; text-transform: uppercase; margin-top: 3px; opacity: .8; }
.tag.noun { background: var(--sky-soft); color: var(--sky); } .tag.verb { background: var(--coral-soft); color: var(--coral); }
.tag.adj { background: var(--amber-soft); color: #9A6A0A; } .tag.adv { background: var(--plum-soft); color: var(--plum); }
.tag.pron { background: var(--green-soft); color: var(--green-ink); } .tag.int { background: var(--paper-2); color: var(--ink-2); }
@media (max-width: 760px) { .hero { grid-template-columns: 1fr; } .hero-art { font-size: 19px; } .key-hint { display: none; } }

.continue { display: flex; align-items: center; gap: 16px; padding: 16px 20px; }
.continue .ico { width: 46px; height: 46px; border-radius: 14px; background: var(--green-soft); display: grid; place-items: center; font-size: 22px; }
.continue .btn { margin-left: auto; }

/* ---------- learn ---------- */
.book-list { display: grid; gap: 14px; }
.book { display: grid; grid-template-columns: 64px 1fr auto; gap: 18px; align-items: center; padding: 20px 22px; border-radius: var(--radius-lg); background: var(--card); box-shadow: var(--shadow); transition: transform .18s; }
.book:hover { transform: translateY(-2px); }
.book .spine { width: 64px; height: 84px; border-radius: 8px 14px 14px 8px; background: var(--green); position: relative; box-shadow: inset 6px 0 0 rgba(0,0,0,.18); display: grid; place-items: center; color: #fff; font: 700 28px var(--display); }
.book.b1 .spine { background: var(--sky); } .book.b2 .spine { background: var(--plum); }
.book h3 { font-size: 24px; }
.book .meta { color: var(--muted); font-size: 14px; font-weight: 700; margin-top: 4px; }
.book .go { font-weight: 800; color: var(--green); }

.cat-list { display: grid; gap: 10px; }
.cat { display: grid; grid-template-columns: 44px 1fr auto; gap: 14px; align-items: center; padding: 14px 18px; background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); transition: transform .15s; }
.cat:hover { transform: translateX(3px); }
.cat .num { width: 44px; height: 44px; border-radius: 12px; background: var(--paper-2); display: grid; place-items: center; font: 600 18px var(--display); color: var(--ink-2); }
.cat.done .num { background: var(--green-soft); color: var(--green-ink); }
.cat h4 { font-size: 19px; }
.cat .meta { font-size: 13px; color: var(--muted); font-weight: 700; margin-top: 2px; }
.cat .bar { width: 90px; height: 8px; border-radius: 99px; background: var(--paper-2); overflow: hidden; }
.cat .bar i { display: block; height: 100%; background: var(--green); border-radius: 99px; }

/* reader */
.reader { max-width: 760px; margin: 0 auto; }
.reader-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.reader-top .count { font-weight: 800; color: var(--muted); font-size: 14px; }
.progress { height: 6px; background: var(--paper-2); border-radius: 99px; overflow: hidden; margin-bottom: 20px; }
.progress i { display: block; height: 100%; background: var(--green); border-radius: 99px; transition: width .3s ease; }
.page { background: var(--card); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: clamp(24px, 5vw, 48px); min-height: 360px; position: relative; }
.page::before { content: ''; position: absolute; inset: 0 0 auto 0; height: 6px; background: var(--green); border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.page .eyebrow { margin-bottom: 10px; }
.page h2 { font-size: clamp(26px, 4vw, 34px); margin-bottom: 18px; }
.page .body { font-family: var(--book); font-size: clamp(19px, 2.2vw, 22px); line-height: 1.6; white-space: pre-line; color: var(--ink); }
.page .body b { color: var(--green-ink); font-weight: 600; background: linear-gradient(transparent 62%, var(--green-soft) 62%); padding: 0 2px; }
.page .check { margin-top: 26px; padding-top: 20px; border-top: 1px dashed var(--line); display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.page .check .lbl { font-weight: 800; }
.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 18px; }
.pager .btn { min-width: 120px; }
.key-hint { text-align: center; font-size: 13px; color: var(--muted); margin-top: 12px; }

/* ---------- quiz ---------- */
.quiz { max-width: 760px; margin: 0 auto; }
.quiz-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; font-weight: 800; font-size: 14px; color: var(--muted); }
.quiz-top .tally { display: flex; gap: 10px; }
.quiz-top .tally b { padding: 3px 10px; border-radius: 99px; font-size: 13px; }
.tally .ok { background: var(--green-soft); color: var(--green-ink); }
.tally .bad { background: var(--coral-soft); color: var(--coral); }
.qcard { background: var(--card); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: clamp(22px, 5vw, 44px); }
.qcard .prompt { font-weight: 800; color: var(--coral); font-size: 14px; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 14px; }
.qcard .qtext { font-family: var(--book); font-size: clamp(22px, 3vw, 30px); line-height: 1.45; margin-bottom: 26px; }
.qcard .qtext .blank { display: inline-block; min-width: 4.5ch; border-bottom: 3px solid var(--ink); margin: 0 4px; transform: translateY(-4px); }
.qcard .qtext .blank.filled { border-color: var(--green); color: var(--green-ink); font-weight: 600; }
.qcard .qtext .word { display: inline-block; padding: 0 6px; border-radius: 8px; border: 2px solid var(--line); margin: 2px 0; cursor: pointer; transition: all .15s; line-height: 1.3; }
.qcard .qtext .word:hover { border-color: var(--ink-2); background: var(--paper); }
.qcard .qtext .word.ok { border-color: var(--green); background: var(--green-soft); }
.qcard .qtext .word.bad { border-color: var(--coral); background: var(--coral-soft); }
.qcard .qtext .word.dim { opacity: .45; pointer-events: none; }
.qcard .qtext .word.focus { border-color: var(--amber); background: var(--amber-soft); }
.qcard .qtext .word.hl { background: var(--amber-soft); border-color: var(--amber); }
.qcard .qtext mark { background: linear-gradient(transparent 60%, var(--amber-soft) 60%); color: inherit; }
.options { display: grid; gap: 10px; }
.options.cols { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }
.opt {
  text-align: left; padding: 16px 18px; border-radius: 16px; background: var(--paper); border: 2px solid var(--line);
  font-weight: 700; font-size: 17px; transition: all .15s; display: flex; gap: 12px; align-items: flex-start; line-height: 1.35;
}
.opt .k { flex: none; width: 28px; height: 28px; border-radius: 9px; background: var(--card); border: 1.5px solid var(--line); font: 800 13px/26px var(--body); text-align: center; color: var(--muted); }
.opt:hover { border-color: var(--ink-2); background: var(--card); }
.opt.center { justify-content: center; text-align: center; font-family: var(--book); font-size: 20px; }
.opt.ok { border-color: var(--green); background: var(--green-soft); }
.opt.ok .k { background: var(--green); color: #fff; border-color: var(--green); }
.opt.bad { border-color: var(--coral); background: var(--coral-soft); }
.opt.bad .k { background: var(--coral); color: #fff; border-color: var(--coral); }
.opt[disabled] { pointer-events: none; }
.opt.dim { opacity: .5; }
.pos-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
@media (max-width: 560px) { .pos-grid { grid-template-columns: repeat(2, 1fr); } }
.pos-grid .opt { justify-content: center; text-align: center; padding: 14px 8px; text-transform: capitalize; }
.feedback { margin-top: 22px; padding: 18px 20px; border-radius: 16px; display: flex; gap: 14px; align-items: flex-start; animation: rise .25s ease both; }
.feedback.ok { background: var(--green-soft); color: var(--green-ink); }
.feedback.bad { background: var(--coral-soft); color: #8d2f1e; }
.feedback .mark { font: 700 22px/1 var(--display); flex: none; }
.feedback b { display: block; margin-bottom: 2px; }
.feedback p { font-size: 15px; line-height: 1.5; }
.quiz-foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
.step-dots { display: flex; gap: 6px; margin: -10px 0 18px; flex-wrap: wrap; }
.step-dots i { width: 10px; height: 10px; border-radius: 99px; background: var(--paper-2); }
.step-dots i.ok { background: var(--green); } .step-dots i.bad { background: var(--coral); } .step-dots i.cur { background: var(--amber); }

/* summary */
.summary { text-align: center; padding: 36px 24px; }
.ring { width: 170px; height: 170px; margin: 0 auto 18px; border-radius: 50%; display: grid; place-items: center; position: relative; }
.ring::after { content: ''; position: absolute; inset: 14px; background: var(--card); border-radius: 50%; }
.ring .val { position: relative; z-index: 1; font: 600 44px/1 var(--display); }
.ring .val small { display: block; font: 700 12px var(--body); color: var(--muted); text-transform: uppercase; letter-spacing: .08em; margin-top: 4px; }
.summary h2 { margin-bottom: 6px; }
.summary .split { display: flex; justify-content: center; gap: 28px; margin: 18px 0 26px; }
.summary .split b { font: 600 26px/1 var(--display); display: block; }
.summary .split span { font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.summary .actions { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.review { margin-top: 26px; display: grid; gap: 10px; text-align: left; }
.review .item { padding: 14px 16px; border-radius: 14px; background: var(--card); border-left: 4px solid var(--coral); box-shadow: var(--shadow); font-size: 15px; }
.review .item .q { font-family: var(--book); font-size: 17px; margin-bottom: 4px; }
.review .item .a { color: var(--green-ink); font-weight: 700; }
.review .item .e { color: var(--ink-2); margin-top: 4px; font-size: 14px; }

/* ---------- test hub ---------- */
.test-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
@media (max-width: 700px) { .test-grid { grid-template-columns: 1fr; } }
.topic-pick { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 10px; }
.topic-pick button { padding: 12px 14px; text-align: left; border-radius: 14px; background: var(--card); border: 1.5px solid var(--line); font-weight: 700; font-size: 15px; display: flex; justify-content: space-between; align-items: center; gap: 8px; transition: all .15s; }
.topic-pick button:hover { border-color: var(--green); background: var(--green-soft); }
.topic-pick button small { color: var(--muted); font-size: 12px; }

/* ---------- progress ---------- */
.kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
@media (max-width: 760px) { .kpis { grid-template-columns: repeat(2, 1fr); } }
.kpi { background: var(--card); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.kpi b { font: 600 34px/1 var(--display); display: block; }
.kpi span { font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.mastery { display: grid; gap: 8px; }
.mrow { display: grid; grid-template-columns: 1fr 120px 56px; align-items: center; gap: 12px; padding: 10px 14px; background: var(--card); border-radius: 12px; box-shadow: var(--shadow); font-weight: 700; font-size: 15px; }
.mrow .bar { height: 10px; border-radius: 99px; background: var(--paper-2); overflow: hidden; }
.mrow .bar i { display: block; height: 100%; border-radius: 99px; background: var(--green); }
.mrow .bar i.weak { background: var(--coral); } .mrow .bar i.mid { background: var(--amber); }
.mrow .pct { text-align: right; color: var(--muted); font-size: 13px; }
.mrow.untested { opacity: .55; }
.history { display: grid; gap: 8px; }
.hrow { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 16px; background: var(--card); border-radius: 12px; box-shadow: var(--shadow); font-size: 15px; }
.hrow .when { color: var(--muted); font-size: 13px; font-weight: 700; }
.hrow .score { font: 600 20px/1 var(--display); }
.pill { padding: 3px 10px; border-radius: 99px; font-size: 12px; font-weight: 800; background: var(--paper-2); }
.pill.good { background: var(--green-soft); color: var(--green-ink); } .pill.ok { background: var(--amber-soft); color: #8a5a00; } .pill.weak { background: var(--coral-soft); color: var(--coral); }

/* ---------- game ---------- */
.modes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
@media (max-width: 700px) { .modes { grid-template-columns: 1fr; } }
.mode { text-align: left; padding: 20px 22px; border-radius: var(--radius-lg); background: var(--card); box-shadow: var(--shadow); display: grid; gap: 6px; transition: transform .15s; border: 2px solid transparent; }
.mode:hover { transform: translateY(-2px); border-color: var(--green); }
.mode h3 { font-size: 22px; }
.mode .vs { display: flex; gap: 6px; flex-wrap: wrap; }
.mode .best { font-size: 13px; color: var(--muted); font-weight: 800; }

.arena { position: relative; max-width: 720px; margin: 0 auto; background: var(--card); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); overflow: hidden; height: min(72vh, 640px); min-height: 440px; user-select: none; touch-action: manipulation; }
.arena .sky { position: absolute; inset: 0; background: linear-gradient(#fff, var(--paper)); }
.arena .hud { position: absolute; top: 0; left: 0; right: 0; display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; z-index: 3; font-weight: 800; }
.arena .hud .score { font: 600 28px/1 var(--display); }
.arena .hud .lives { font-size: 18px; letter-spacing: 2px; }
.arena .hud .combo { color: var(--amber); font-size: 14px; }
.arena .field { position: absolute; inset: 0; z-index: 2; }
.falling { position: absolute; left: 50%; transform: translateX(-50%); padding: 10px 22px; border-radius: 999px; background: var(--ink); color: #fff; font: 600 clamp(22px, 4vw, 30px)/1 var(--display); box-shadow: var(--shadow-lg); white-space: nowrap; will-change: top; }
.falling.ok { background: var(--green); animation: pop .35s ease forwards; }
.falling.bad { background: var(--coral); animation: shake .4s ease forwards; }
@keyframes pop { to { transform: translateX(-50%) scale(1.25); opacity: 0; } }
@keyframes shake { 0%,100% { transform: translateX(-50%); } 25% { transform: translateX(calc(-50% - 10px)); } 75% { transform: translateX(calc(-50% + 10px)); } }
.bins { position: absolute; left: 0; right: 0; bottom: 0; z-index: 4; display: grid; gap: 8px; padding: 10px; background: rgba(255,255,255,.7); backdrop-filter: blur(8px); border-top: 1px solid var(--line); }
.bin { padding: 18px 8px; border-radius: 16px; font: 600 clamp(15px, 2.4vw, 20px)/1 var(--display); text-transform: capitalize; border: 2px solid transparent; transition: transform .1s; color: var(--ink); }
.bin:active { transform: scale(.96); }
.bin .key { display: block; font: 800 11px/1 var(--body); opacity: .55; margin-top: 6px; }
.bin.hit { animation: binpop .3s ease; }
@keyframes binpop { 50% { transform: scale(1.08); } }
.arena .overlay { position: absolute; inset: 0; z-index: 6; display: grid; place-items: center; background: rgba(246,243,235,.92); text-align: center; padding: 24px; }
.arena .overlay .box { display: grid; gap: 12px; justify-items: center; }
.arena .overlay .big { font: 600 48px/1 var(--display); }
.float { position: absolute; z-index: 5; font: 800 16px var(--body); color: var(--green-ink); animation: floatup .7s ease forwards; pointer-events: none; }
@keyframes floatup { to { transform: translateY(-40px); opacity: 0; } }
.game-foot { max-width: 720px; margin: 14px auto 0; display: flex; justify-content: space-between; align-items: center; gap: 12px; font-size: 14px; color: var(--muted); }

/* ---------- misc ---------- */
.empty { text-align: center; padding: 40px 20px; color: var(--muted); }
.footer-note { margin-top: 40px; text-align: center; font-size: 13px; color: var(--muted); }
.footer-note a { color: var(--green); font-weight: 700; }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }