/* Learn Tamil — Letters: now-playing panel, sections, uyirmei table, Build a letter.
   Order matters: files load in number order (see tools/lib/assets.mjs). */
/* ---------- Now-playing panel ---------- */
.player{display:flex;align-items:center;gap:18px;padding:14px 18px;margin:6px 0 18px}
.player .big{font-family:var(--font-ta);font-size:clamp(54px,10vw,84px);font-weight:800;line-height:1;min-width:1.5em;text-align:center;color:var(--fam,var(--accent))}
.player .big.pop{animation:pop .4s ease}
@keyframes pop{0%{transform:scale(.7)}60%{transform:scale(1.1)}100%{transform:scale(1)}}
.player .meta{flex:1;min-width:0}
.player .roman{font-size:clamp(20px,3.4vw,26px);font-weight:700}
.player .kind{font-family:var(--font-ta);color:var(--text-muted);font-size:15px}
.player .hint{font-size:14px;color:var(--text-muted);margin-top:2px}
.player .ex{margin-top:6px;display:inline-flex;align-items:center;gap:8px;border:1px solid var(--border);background:var(--bg-subtle);border-radius:999px;padding:4px 12px 4px 8px;cursor:pointer;font-size:15px}
.player .ex[hidden]{display:none}
.play-btn{border:0;width:56px;height:56px;border-radius:50%;background:var(--accent);color:var(--on-accent);display:grid;place-items:center;cursor:pointer;flex:none;box-shadow:0 8px 20px -6px rgb(0 120 212 / .55)}
.play-btn svg{width:24px;height:24px}
@media (max-width:560px){.player{gap:12px;padding:12px}.play-btn{width:48px;height:48px}}

/* ---------- Sections ---------- */
main{padding-bottom:40px}
.panel{display:none}
.panel.on{display:block}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:8px 0 14px}
.sec-head h2{margin:0;font-size:clamp(22px,3.4vw,28px);font-family:var(--font-ta);line-height:1.3}
.sec-head p{margin:2px 0 0;color:var(--text-muted)}
.toolbar{display:flex;gap:14px;align-items:center;flex-wrap:wrap;font-size:14px;color:var(--text-muted)}
.toolbar label{display:inline-flex;align-items:center;gap:6px;cursor:pointer}
.toolbar input{accent-color:var(--accent)}
.notice{border-left:4px solid #f2a900;padding:12px 14px;margin:0 0 16px;font-size:14px;border-radius:12px}
.notice[hidden]{display:none}
.callout{padding:14px 16px;margin:18px 0;font-size:15px}
.callout b{font-family:var(--font-ta)}

.group{margin:22px 0 10px;display:flex;align-items:center;gap:10px;font-family:var(--font-ta);font-weight:700;font-size:18px}
.group .chip-s{font-family:var(--font-ui);font-size:12px;font-weight:700;padding:2px 9px;border-radius:999px;background:var(--accent-soft);color:var(--accent-deep)}
.grid{display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(96px,1fr))}
.tile{--fam:var(--c-uyir);position:relative;border:1px solid var(--glass-line);background:var(--glass);box-shadow:var(--glass-shadow);border-radius:16px;padding:12px 6px 10px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:2px;transition:transform .12s,background .15s}
.tile::after{content:"";position:absolute;left:18%;right:18%;bottom:0;height:3px;border-radius:3px 3px 0 0;background:var(--fam)}
.tile:hover{transform:translateY(-2px)}
.tile:active{transform:translateY(1px)}
.tile .l{font-family:var(--font-ta);font-size:38px;font-weight:700;line-height:1.25;color:var(--fam)}
.tile .r{font-size:13px;color:var(--text-muted);font-weight:600}
.tile .e{font-size:18px;line-height:1}
.tile.playing{background:var(--fam);border-color:var(--fam)}
.tile.playing .l,.tile.playing .r{color:#fff}
.f-uyir{--fam:var(--c-uyir)} .f-mei{--fam:var(--c-mei)} .f-ay{--fam:var(--c-ay)} .f-um{--fam:var(--c-um)}
.hide-roman .tile .r,.hide-roman .player .roman{visibility:hidden}

/* Uyirmei table */
.tablewrap{overflow-x:auto;padding:12px;-webkit-overflow-scrolling:touch}
table.um{border-collapse:separate;border-spacing:5px;margin:0 auto}
table.um th{font-family:var(--font-ta);font-size:20px;font-weight:700;padding:2px 4px}
table.um thead th{color:var(--c-uyir);position:sticky;top:0}
table.um tbody th{color:var(--c-mei)}
table.um .tile{width:78px;padding:6px 2px 7px;border-radius:12px}
table.um .tile .l{font-size:21px;white-space:nowrap}
table.um .tile .r{font-size:11px}
.rowplay{border:1px solid var(--border);background:var(--bg-subtle);border-radius:10px;width:34px;height:34px;cursor:pointer;display:grid;place-items:center}
.rowplay svg{width:14px;height:14px}

/* Builder */
.builder{padding:16px;margin-bottom:16px}
.builder h3{margin:0 0 10px;font-size:17px}
.pickrow{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.pick{border:1px solid var(--border);background:var(--bg-subtle);border-radius:10px;min-width:44px;height:44px;padding:0 8px;font-family:var(--font-ta);font-size:20px;font-weight:700;cursor:pointer}
.pick[aria-pressed="true"]{background:var(--accent);color:var(--on-accent);border-color:var(--accent)}
.equation{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;font-family:var(--font-ta);font-weight:800;font-size:clamp(30px,6vw,48px);padding:10px 0 4px}
.equation .op{color:var(--text-muted);font-weight:600}
.equation .m{color:var(--c-mei)} .equation .u{color:var(--c-uyir)} .equation .res{color:var(--c-um);cursor:pointer}
.eq-note{text-align:center;color:var(--text-muted);font-size:14px}