/* अभ्यास-माला · Abhyāsa-mālā — practice page styles.
 *
 * VijayaDV is the font the Flutter app already ships (assets/fonts/VijayaDV.ttf,
 * served by `flutter build web` at /assets/assets/fonts/VijayaDV.ttf). The URL is
 * relative to this file, so it works under any host and path prefix.
 * Palette: SHABDA's deep brown / warm brown / gold / cream. Gold (#b8860b) is used
 * only for rules and fills; gold-toned text uses a darker or lighter shade that
 * keeps WCAG AA contrast in each scheme.
 */

@font-face {
  font-family: "VijayaDV";
  src: url("../assets/assets/fonts/VijayaDV.ttf") format("truetype");
  font-display: swap;
}

:root {
  --deep-brown: #1a1510;
  --warm-brown: #2d1f0e;
  --gold: #b8860b;
  --cream: #f5e6c8;

  --bg: #fbf5e9;
  --surface: #fffaf0;
  --surface-2: #f5e6c8;
  --text: #1a1510;
  --text-soft: #4a3b26;
  --accent-text: #7a5508;
  --rule: #b8860b;
  --border: #c9ad7f;
  --input-bg: #ffffff;
  --input-border: #7a5f3a;
  --btn-bg: #2d1f0e;
  --btn-text: #f5e6c8;
  --btn2-bg: transparent;
  --btn2-text: #2d1f0e;
  --focus: #1b5fb3;
  --ok: #1d6431;
  --ok-bg: #e5f2e3;
  --bad: #9a2a1c;
  --bad-bg: #fbe7e1;
  --draft-bg: #fff1cf;
  --draft-border: #b8860b;
  --mark-bg: #ffd9a6;
  --mast-bg: #1a1510;
  --mast-text: #f5e6c8;
  --mast-accent: #e2b754;

  --font-sa: "VijayaDV", "Noto Serif Devanagari", "Noto Sans Devanagari", "Sanskrit Text",
             "Kohinoor Devanagari", "Devanagari Sangam MN", "Mangal", "Nirmala UI", serif;
  --font-hi: "Noto Sans Devanagari", "Kohinoor Devanagari", "Devanagari Sangam MN",
             "Mangal", "Nirmala UI", sans-serif;
  --font-te: "Noto Sans Telugu", "Kohinoor Telugu", "Telugu Sangam MN", "Gautami",
             "Nirmala UI", sans-serif;
  --font-kn: "Noto Sans Kannada", "Kannada Sangam MN", "Tunga", "Nirmala UI", sans-serif;
  --font-body: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-ui: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --body-size: 1.125rem;
  --sa-scale: 1.35;
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1510;
    --surface: #2d1f0e;
    --surface-2: #3a2914;
    --text: #f5e6c8;
    --text-soft: #dccbab;
    --accent-text: #e8c06a;
    --rule: #b8860b;
    --border: #6b5233;
    --input-bg: #120e0a;
    --input-border: #b39a74;
    --btn-bg: #e2b754;
    --btn-text: #1a1510;
    --btn2-bg: transparent;
    --btn2-text: #f5e6c8;
    --focus: #8cc2ff;
    --ok: #9fdcaa;
    --ok-bg: #1d3320;
    --bad: #ffb4a3;
    --bad-bg: #3d1d16;
    --draft-bg: #33260f;
    --draft-border: #b8860b;
    --mark-bg: #6b4513;
    --mast-bg: #120e0a;
    --mast-text: #f5e6c8;
    --mast-accent: #e2b754;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--body-size);
  line-height: 1.6;
}

:lang(hi) { font-family: var(--font-hi); }
:lang(te) { font-family: var(--font-te); }
:lang(kn) { font-family: var(--font-kn); }
:lang(en) { font-family: var(--font-body); }

.sa, [lang="sa"] {
  font-family: var(--font-sa);
  font-size: calc(var(--sa-scale) * 1em);
  line-height: 1.55;
}
/* Sanskrit inside Sanskrit: do not scale twice. */
[lang="sa"] [lang="sa"], .sa .sa { font-size: 1em; }

a { color: var(--accent-text); text-underline-offset: 0.18em; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  background: var(--btn-bg);
  color: var(--btn-text);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
}
.skip:focus { top: 1rem; }

/* ── Masthead ── */
.masthead {
  background:
    radial-gradient(ellipse at 50% -40%, rgba(184, 134, 11, 0.35), transparent 65%),
    linear-gradient(180deg, var(--warm-brown), var(--mast-bg));
  color: var(--mast-text);
  border-bottom: 3px double var(--gold);
  padding: 1.5rem 1rem 1.25rem;
  text-align: center;
}
.masthead__inner { max-width: 60rem; margin: 0 auto; }
.masthead__brand {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mast-accent);
}
.masthead__title {
  margin: 0.25rem 0 0.1rem;
  font-weight: 700;
  font-size: clamp(1.6rem, 4.5vw, 2.4rem);
  line-height: 1.25;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  column-gap: 0.6rem;
}
.masthead__title .sa { font-size: 1.3em; color: var(--mast-text); }
.masthead__sep { color: var(--mast-accent); }
.masthead__roman { font-family: var(--font-body); font-style: italic; font-weight: 400; }
.masthead__sub { margin: 0.25rem 0 0; color: #e6d5b3; font-size: 1rem; }

/* ── Draft banner ── */
.draft {
  max-width: 60rem;
  margin: 1rem auto 0;
  padding: 0.75rem 1rem;
  background: var(--draft-bg);
  border: 1px solid var(--draft-border);
  border-left-width: 6px;
  border-radius: var(--radius);
  width: calc(100% - 2rem);
}
.draft p { margin: 0; }
.draft__sa { font-weight: 700; }
.draft__en { font-size: 0.95rem; color: var(--text-soft); }

/* ── Toolbar ── */
.toolbar { max-width: 60rem; margin: 0.75rem auto 0; padding: 0 1rem; }
.toolbar__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: end;
  font-family: var(--font-ui);
  font-size: 1rem;
}
.field { display: flex; flex-direction: column; gap: 0.2rem; }
.field__label { font-size: 0.85rem; color: var(--text-soft); font-weight: 600; }
.field--check { flex-direction: row; align-items: center; gap: 0.5rem; min-height: 2.75rem; }
.field--check input { width: 1.25rem; height: 1.25rem; accent-color: var(--gold); }
.field__control, select {
  min-height: 2.75rem;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--input-border);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--text);
  font: inherit;
}

/* ── Page ── */
.page { max-width: 60rem; margin: 0 auto; padding: 1rem 1rem 3rem; }
.page:focus { outline: none; }
.loading, .error-msg { color: var(--text-soft); }

.crumbs { margin: 0.5rem 0 1rem; font-family: var(--font-ui); font-size: 1rem; }

h2, h3, h4 { line-height: 1.3; }

.part { margin: 1.5rem 0 2rem; }
.part__title {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 0.75rem;
  margin: 0 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--rule);
  font-size: 1.35rem;
}
.part__title .sa { font-size: 1.35em; }
.part__empty { color: var(--text-soft); font-style: italic; margin: 0; }

.units { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.9rem;
         grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr)); }
.unit-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  height: 100%;
  padding: 1rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 4px solid var(--gold);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.unit-card:hover { box-shadow: 0 6px 18px rgba(26, 21, 16, 0.18); transform: translateY(-2px); }
.unit-card__no { font-family: var(--font-ui); font-size: 0.85rem; color: var(--accent-text); font-weight: 700;
                 letter-spacing: 0.06em; text-transform: uppercase; }
.unit-card__sa { margin: 0; font-weight: 700; }
.unit-card__tr { margin: 0; color: var(--text-soft); }
.unit-card__meta { margin-top: auto; font-family: var(--font-ui); font-size: 0.9rem; color: var(--text-soft); }

.chips { display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 0; padding: 0; list-style: none; }
.chip {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
}

.progress { font-family: var(--font-ui); font-size: 0.9rem; font-weight: 600; color: var(--ok); }

/* ── Unit view ── */
.unit-head { margin-bottom: 1rem; }
.unit-head h2 { margin: 0; display: flex; flex-wrap: wrap; gap: 0.25rem 0.75rem; align-items: baseline; font-size: 1.5rem; }
.unit-head h2 .sa { font-size: 1.4em; }
.unit-head__tr { color: var(--text-soft); font-weight: 400; }
.unit-head__bar { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; align-items: center; margin-top: 0.5rem; }

.lesson {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1.1rem;
  margin: 0 0 1.5rem;
}
.lesson > summary { cursor: pointer; font-weight: 700; font-family: var(--font-ui); padding: 0.4rem 0; min-height: 2.75rem;
                    display: flex; align-items: center; }
.lesson__body { margin: 0.5rem 0; white-space: pre-line; }
.examples { margin: 0.5rem 0 0; padding-left: 1.4rem; }
.examples li { margin: 0.4rem 0; }
.examples .arrow { color: var(--accent-text); padding: 0 0.4rem; }
.examples .note { display: block; font-size: 0.95rem; color: var(--text-soft); }

.exercise {
  margin: 0 0 2rem;
  padding: 1rem 1.1rem 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.exercise__head { display: flex; flex-wrap: wrap; gap: 0.5rem 0.75rem; align-items: center; margin: 0 0 0.25rem; }
.exercise__head h3 { margin: 0; font-size: 1.25rem; }
.badge {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  background: var(--btn-bg);
  color: var(--btn-text);
}
.badge--beta { vertical-align: middle; margin-left: 0.4rem; font-size: 0.75rem; letter-spacing: 0.04em; }
.badge--kind { background: transparent; color: var(--text); border: 1px solid var(--border); font-weight: 600; }
.exercise__instr { margin: 0.25rem 0 0.75rem; }
.exercise__instr .sa { display: block; font-weight: 700; }
.exercise__instr .tr { display: block; color: var(--text-soft); }

.items { list-style: none; margin: 0; padding: 0; counter-reset: item; }
.item {
  counter-increment: item;
  position: relative;
  padding: 0.85rem 0 1rem 2.4rem;
  border-top: 1px dashed var(--border);
}
.item::before {
  content: counter(item) ".";
  position: absolute;
  left: 0.2rem;
  top: 0.95rem;
  font-family: var(--font-ui);
  font-weight: 700;
  color: var(--accent-text);
}
.item__q { margin: 0 0 0.5rem; overflow-wrap: anywhere; }
.item__q mark { background: var(--mark-bg); color: inherit; border-radius: 3px; padding: 0 0.15em; }
.item__hint { display: block; font-size: 0.95rem; color: var(--text-soft); }
.item__src-note { font-size: 0.85rem; color: var(--text-soft); font-family: var(--font-ui); }

.answer-row { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: stretch; }
.answer-row .answer-input { flex: 1 1 16rem; }
.answer-input, .blank-input, textarea.answer-input {
  min-height: 2.9rem;
  padding: 0.35rem 0.6rem;
  border: 1.5px solid var(--input-border);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--text);
  font: inherit;
  min-width: 0;
  max-width: 100%;
}
.answer-input[lang="sa"], .blank-input[lang="sa"] { font-family: var(--font-sa); font-size: calc(var(--sa-scale) * 1em); }
textarea.answer-input { width: 100%; min-height: 5rem; resize: vertical; }
.blank-input { width: 9em; margin: 0 0.2em; padding: 0.1rem 0.4rem; min-height: 2.4rem; vertical-align: baseline; font-size: 1em !important; }
.answer-input[aria-invalid="true"], .blank-input[aria-invalid="true"] { border-color: var(--bad); }

.roman-preview { display: block; min-height: 1.6em; margin-top: 0.25rem; color: var(--text-soft); font-size: 0.95rem; }
.roman-preview[hidden] { display: none; }

.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.6rem; }
.btn {
  min-height: 2.75rem;
  padding: 0.45rem 1.1rem;
  border-radius: 8px;
  border: 1.5px solid var(--btn-bg);
  background: var(--btn-bg);
  color: var(--btn-text);
  font-family: var(--font-ui);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { filter: brightness(1.12); }
.btn--ghost { background: var(--btn2-bg); color: var(--btn2-text); border-color: var(--input-border); }
.btn--small { min-height: 2.25rem; padding: 0.25rem 0.75rem; font-size: 0.9rem; }
.btn[disabled] { opacity: 0.55; cursor: default; }

.options { border: 0; margin: 0; padding: 0; }
.options legend { padding: 0; margin-bottom: 0.4rem; }
.option { display: flex; align-items: center; gap: 0.6rem; padding: 0.25rem 0; min-height: 2.75rem; cursor: pointer; }
.option input { width: 1.2rem; height: 1.2rem; accent-color: var(--gold); flex: none; }

.match { display: grid; gap: 0.5rem; margin: 0.25rem 0 0; }
.match__row { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; align-items: center; }
.match__left { flex: 1 1 10rem; }
.match__row select { flex: 1 1 12rem; }

.feedback { margin-top: 0.6rem; }
.feedback:empty { display: none; }
.feedback__box { padding: 0.6rem 0.85rem; border-radius: 8px; border-left: 5px solid; }
.feedback__box--ok { background: var(--ok-bg); border-color: var(--ok); }
.feedback__box--bad { background: var(--bad-bg); border-color: var(--bad); }
.feedback__box--info { background: var(--surface-2); border-color: var(--rule); }
.feedback__verdict { font-family: var(--font-ui); font-weight: 700; margin: 0 0 0.25rem; }
.feedback__box--ok .feedback__verdict { color: var(--ok); }
.feedback__box--bad .feedback__verdict { color: var(--bad); }
.feedback p { margin: 0.2rem 0; }
.feedback__label { font-family: var(--font-ui); font-size: 0.9rem; font-weight: 600; color: var(--text-soft); }

.colophon {
  border-top: 3px double var(--gold);
  background: var(--mast-bg);
  color: var(--mast-text);
  text-align: center;
  padding: 1rem;
  font-size: 0.95rem;
}
.colophon p { margin: 0.2rem 0; }

@media (max-width: 30rem) {
  :root { --body-size: 1.0625rem; }
  .item { padding-left: 1.9rem; }
  .exercise { padding-left: 0.8rem; padding-right: 0.8rem; }
  .actions .btn { flex: 1 1 auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
  .unit-card:hover { transform: none; }
}