@font-face {
  font-family: "Noto Sans Kannada";
  src: url("fonts/NotoSansKannada-Regular.ttf") format("truetype");
  font-display: swap;
  unicode-range: U+0C80-0CFF, U+200C-200D, U+25CC;
}

:root {
  --bg: #f7f4ee;
  --surface: #ffffff;
  --surface-2: #f0ebe1;
  --ink: #1f1d1a;
  --muted: #6b655c;
  --line: #e3dccf;
  --accent: #c2410c;
  --accent-ink: #ffffff;
  --accent-soft: #fde7da;
  --good: #15803d;
  --good-soft: #dcfce7;
  --bad: #b91c1c;
  --bad-soft: #fee2e2;
  --warn-soft: #fef3c7;
  --warn-ink: #854d0e;
  --radius: 14px;
  --kn: "Noto Sans Kannada", "Kannada Sangam MN", "Kannada MN", "Tunga", "Nirmala UI", sans-serif;
  --deva: "Kohinoor Devanagari", "Noto Sans Devanagari", "Devanagari Sangam MN", "Nirmala UI", "Mangal", sans-serif;
  --ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171513; --surface: #221f1c; --surface-2: #2b2723; --ink: #f2eee8; --muted: #a39b8f; --line: #3a3530;
    --accent: #fb923c; --accent-ink: #1a1009; --accent-soft: #3b2214; --good: #4ade80; --good-soft: #10291a;
    --bad: #f87171; --bad-soft: #3a1717; --warn-soft: #3a2f10; --warn-ink: #fcd34d;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 var(--ui); }
body { padding: env(safe-area-inset-top, 0) 16px calc(env(safe-area-inset-bottom, 0) + 24px); }
main { max-width: 560px; margin: 0 auto; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 8px; }
h1 { font-size: 1.35rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }
p { margin: 0 0 10px; }
button { font: inherit; }
a { color: var(--accent); }

.kn { font-family: var(--kn); }
.deva { font-family: var(--deva); }
.big { font-size: 2.4rem; line-height: 1.5; }
.sent { font-size: 1.7rem; line-height: 1.6; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.center { text-align: center; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.spread { justify-content: space-between; }
.stack > * + * { margin-top: 10px; }

.topbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 0 10px; gap: 8px; }
.brand { font-weight: 700; font-size: 1.1rem; }
.brand .kn { color: var(--accent); }
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav button { background: none; border: 0; color: var(--muted); padding: 6px 8px; border-radius: 8px; cursor: pointer; }
.nav button.on { color: var(--ink); background: var(--surface-2); }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin: 12px 0; }
.card.hero { padding: 20px; }
.chip { display: inline-block; font-size: .75rem; padding: 2px 8px; border-radius: 999px; background: var(--surface-2); color: var(--muted); }
.chip.warn { background: var(--warn-soft); color: var(--warn-ink); }
.chip.good { background: var(--good-soft); color: var(--good); }
.chip.bad { background: var(--bad-soft); color: var(--bad); }

.btn { appearance: none; border: 1px solid var(--line); background: var(--surface); color: var(--ink); padding: 11px 16px; border-radius: 12px; cursor: pointer; font-weight: 600; }
.btn:disabled { opacity: .5; cursor: default; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.block { display: block; width: 100%; }
.btn.huge { font-size: 1.15rem; padding: 16px; }
.btn.ghost { background: none; border-color: transparent; color: var(--muted); font-weight: 500; }
.btn.danger { color: var(--bad); }
.btn.good { background: var(--good-soft); color: var(--good); border-color: var(--good); }
.btn.bad { background: var(--bad-soft); color: var(--bad); border-color: var(--bad); }

.progress { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; flex: 1; }
.progress > div { height: 100%; background: var(--accent); transition: width .25s; }
.session-top { display: flex; gap: 12px; align-items: center; padding: 14px 0 6px; }

.prompt { text-align: center; padding: 12px 0; }
.label { font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin-bottom: 6px; }

.opts { display: grid; gap: 8px; }
.opt { text-align: left; padding: 13px 14px; border-radius: 12px; border: 2px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; font-size: 1rem; }
.opt.right { border-color: var(--good); background: var(--good-soft); }
.opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt:disabled { cursor: default; }

.hints { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin: 6px 0; }
.hint-btn { border: 1px dashed var(--line); background: none; color: var(--muted); border-radius: 999px; padding: 4px 10px; cursor: pointer; font-size: .85rem; }
.hint-text { text-align: center; color: var(--muted); font-size: 1.05rem; }

.blocks { display: flex; flex-wrap: wrap; gap: 8px; min-height: 58px; padding: 8px; border-radius: 12px; }
.blocks.answer { border: 2px dashed var(--line); }
.block { font-family: var(--kn); font-size: 1.35rem; padding: 6px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; }
.block.used { visibility: hidden; }

.feedback { border-radius: 12px; padding: 12px 14px; margin-top: 12px; }
.feedback.ok { background: var(--good-soft); }
.feedback.no { background: var(--bad-soft); }
.feedback.info { background: var(--surface-2); }

table.ref { width: 100%; border-collapse: collapse; font-size: .95rem; }
table.ref td, table.ref th { border-bottom: 1px solid var(--line); padding: 6px 4px; text-align: left; vertical-align: top; }
table.ref td.kn { font-size: 1.25rem; }
.scroll-x { overflow-x: auto; }

.unit { display: grid; grid-template-columns: 1fr auto; gap: 4px 8px; align-items: center; }
.dots { display: flex; gap: 4px; }
.dot { width: 14px; height: 14px; border-radius: 50%; background: var(--surface-2); border: 1px solid var(--line); }
.dot.done { background: var(--good); border-color: var(--good); }
.dot.cur { background: var(--accent); border-color: var(--accent); }
.dot.cp { border-radius: 3px; }
.dot.fail { background: var(--bad); border-color: var(--bad); }

.rec { border: 1px solid var(--line); border-radius: 12px; padding: 10px; margin-top: 10px; }
.rec audio { width: 100%; margin-top: 6px; }
textarea, input[type=text], input[type=number], select { width: 100%; font: inherit; padding: 10px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); }
textarea.kn { font-size: 1.3rem; }
details summary { cursor: pointer; color: var(--muted); }
.banner { background: var(--warn-soft); color: var(--warn-ink); padding: 10px 12px; border-radius: 10px; margin: 10px 0; font-size: .9rem; }
.footer-actions { position: sticky; bottom: 0; padding: 12px 0 calc(env(safe-area-inset-bottom, 0) + 8px); background: linear-gradient(transparent, var(--bg) 30%); }

/* Guided reading: leave full glyph clusters intact and give touch targets room. */
.letter-large { display: block; font-size: 4.5rem; line-height: 1.8; }
.reading-support { color: var(--muted); font-size: 1.15rem; text-align: center; }
.reading-chunks { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; padding: 12px 0; }
.chunk { min-width: 80px; background: var(--surface-2); border-radius: 12px; padding: 8px; text-align: center; }
.example-words { display: flex; gap: 8px; flex-wrap: wrap; }
.word-help { font-size: 1.7rem; line-height: 1.8; background: transparent; color: var(--ink); border: 0; border-bottom: 2px dotted var(--line); border-radius: 6px; padding: 4px 6px; cursor: pointer; }
.target-word { background: var(--accent-soft); border-color: var(--accent); }
textarea.written-input { font-family: var(--kn); font-size: 1.6rem; line-height: 1.8; }
.written-diff { font-size: 1.7rem; line-height: 2; white-space: pre-wrap; overflow-wrap: anywhere; }
.written-diff .changed { background: var(--warn-soft); color: var(--warn-ink); border-bottom: 2px solid var(--warn-ink); border-radius: 4px; }
button:focus-visible, summary:focus-visible, textarea:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.opts .deva { font-size: 1.5rem; line-height: 1.7; }