:root {
  --bg: #faf8f4; --fg: #1d1a16; --muted: #6b6560; --card: #fff; --line: #e6e1d8;
  --primary: #a3421b; --ok: #1f7a3a; --ok-bg: #e6f4ea; --bad: #b3261e; --bad-bg: #fbe9e7;
  --edit: #8a5a00; --edit-bg: #fff4d6; --radius: 10px;
}
:root { color-scheme: light; }
/* dark palette: system preference unless the user chose a theme, or the user chose dark */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { color-scheme: dark; --bg: #17150f; --fg: #f1ece4; --muted: #a39c92; --card: #221f18; --line: #3a352c;
          --ok-bg: #163b23; --bad-bg: #4a1d19; --edit-bg: #46350e; }
}
:root[data-theme="dark"] { color-scheme: dark; --bg: #17150f; --fg: #f1ece4; --muted: #a39c92; --card: #221f18; --line: #3a352c;
        --ok-bg: #163b23; --bad-bg: #4a1d19; --edit-bg: #46350e; }
.theme-toggle { width: 34px; height: 34px; padding: 6px; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--fg); cursor: pointer; line-height: 0; flex: 0 0 auto; }
.theme-toggle:hover { background: var(--bg); }
.theme-toggle svg { width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle .moon { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .moon { display: block; }
@media (prefers-color-scheme: dark) { :root:not([data-theme]) .theme-toggle .sun { display: none; } :root:not([data-theme]) .theme-toggle .moon { display: block; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.5 -apple-system, "Noto Sans", "Noto Sans Devanagari", "Segoe UI", Roboto, sans-serif; }
a { color: var(--primary); }
main { max-width: 720px; margin: 0 auto; padding: 12px; }
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 24px 12px; }

.top-right { display: flex; align-items: center; gap: 8px; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 14px; background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 2; }
.brand { font-weight: 700; font-size: 20px; text-decoration: none; color: var(--fg); }
.brand span { color: var(--primary); font-weight: 400; font-size: 14px; }
nav { display: flex; gap: 4px; flex-wrap: wrap; }
nav a, nav .link { padding: 6px 10px; border-radius: 6px; text-decoration: none; color: var(--fg); font-size: 14px; }
nav a.on { background: var(--bg); font-weight: 600; }
form.inline { display: inline; }
button.link { background: none; border: 0; color: var(--primary); cursor: pointer; font: inherit; text-decoration: underline; padding: 6px 10px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin: 12px 0; }
.card.narrow { max-width: 420px; margin: 32px auto; }
.card h2 { margin: 0 0 12px; font-size: 20px; }
.card h3 { margin: 16px 0 8px; font-size: 15px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.hint { font-size: 13px; color: var(--muted); margin: -4px 0 12px; }
.flash { padding: 10px 14px; border-radius: 8px; margin: 8px 0; background: var(--ok-bg); color: var(--ok); }
.flash.error { background: var(--bad-bg); color: var(--bad); }
blockquote { margin: 8px 0; padding: 8px 12px; border-left: 3px solid var(--line); color: var(--muted); font-style: italic; }
code, pre { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 14px; }
pre { background: var(--bg); padding: 10px 12px; border-radius: 8px; overflow-x: auto; }

/* entry */
.entry .word { font-size: 40px; margin: 0; line-height: 1.2; }
.entry .translit { color: var(--muted); margin-bottom: 8px; }
.senses { padding-left: 22px; margin: 8px 0; }
.senses li { margin: 6px 0; }
.pos { display: inline-block; font-size: 12px; color: var(--muted); background: var(--bg); border-radius: 4px; padding: 0 6px; margin-right: 6px; text-transform: uppercase; }
.gloss { font-size: 18px; }
.ex { margin: 4px 0 0 4px; font-size: 15px; color: var(--muted); }
.ex .bho { color: var(--fg); }
.meta { margin-top: 10px; font-size: 12px; color: var(--muted); display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.tag { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.tag.ok { background: var(--ok-bg); color: var(--ok); border-color: transparent; }
.tag.bad { background: var(--bad-bg); color: var(--bad); border-color: transparent; }
.src { margin-left: auto; }

/* progress */
.progress { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--muted); margin: 6px 0; }
.progress a { text-decoration: none; white-space: nowrap; }
.undo { text-align: center; font-size: 14px; margin-top: 6px; }
.bar { flex: 1; height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; }
.bar div { height: 100%; background: var(--primary); }

/* verdict buttons */
.verdicts { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; margin: 8px 0; }
.v { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  padding: 16px 6px; border-radius: var(--radius); border: 2px solid var(--line); background: var(--card);
  font: inherit; font-size: 20px; font-weight: 700; cursor: pointer; text-decoration: none; color: var(--fg); min-height: 84px; }
.v.ok { background: var(--ok); border-color: var(--ok); color: #fff; }
.v.bad { background: var(--bad); border-color: var(--bad); color: #fff; }
.v.edit { background: var(--edit); border-color: var(--edit); color: #fff; }
.v:active { transform: scale(.98); }
#reason-box { grid-column: 1 / -1; display: grid; gap: 8px; }
#reason-box[hidden] { display: none; }

/* forms */
button, .button { font: inherit; padding: 10px 16px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--fg); cursor: pointer; text-decoration: none; display: inline-block; }
button.primary, .button.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
button.ok { background: var(--ok); color: #fff; border-color: var(--ok); }
button.bad { background: var(--bad); color: #fff; border-color: var(--bad); }
button.big { font-size: 18px; padding: 14px 22px; }
button.wide { width: 100%; }
button.small, .button.small, input.small { padding: 6px 10px; font-size: 14px; }
input, select, textarea { font: inherit; padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); color: var(--fg); width: 100%; }
.field { display: block; margin: 10px 0; }
.field span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.row { display: flex; gap: 8px; align-items: center; }
.row.wrap { flex-wrap: wrap; }
.row.wrap > * { flex: 1 1 140px; }
.row.wrap > button { flex: 0 0 auto; }
.check { display: flex; align-items: center; gap: 6px; white-space: nowrap; font-size: 14px; color: var(--bad); }
.check input { width: auto; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 14px; }
fieldset.sense { border: 1px solid var(--line); border-radius: 8px; padding: 10px; margin: 10px 0; display: grid; gap: 8px; }
fieldset.sense.new { border-style: dashed; }
fieldset legend { font-size: 13px; color: var(--muted); padding: 0 6px; }
fieldset .row select { width: auto; flex: 1; }
.ex-row { display: grid; gap: 6px; grid-template-columns: 1fr 1fr; }
.ex-row.new input { border-style: dashed; }
@media (max-width: 520px) { .ex-row { grid-template-columns: 1fr; } }

/* lists */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin: 12px 0; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; text-align: center; text-decoration: none; color: var(--fg); }
.stat b { display: block; font-size: 28px; }
.stat b small { font-size: 14px; color: var(--muted); font-weight: 400; }
.stat span { font-size: 13px; color: var(--muted); }
table.list { width: 100%; border-collapse: collapse; font-size: 15px; }
table.list th { text-align: left; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; padding: 6px 8px; }
table.list td { padding: 8px; border-top: 1px solid var(--line); vertical-align: top; }
.w { font-size: 18px; font-weight: 600; text-decoration: none; }
.v-badge { display: inline-block; font-size: 12px; font-weight: 600; padding: 1px 8px; border-radius: 999px; }
.v-badge.correct { background: var(--ok-bg); color: var(--ok); }
.v-badge.incorrect { background: var(--bad-bg); color: var(--bad); }
.v-badge.edit { background: var(--edit-bg); color: var(--edit); }
.filters { display: flex; gap: 8px; margin-bottom: 12px; }
.pager { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 14px; margin-top: 12px; }
ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li { padding: 6px 0; border-top: 1px solid var(--line); }
table.changes { width: 100%; border-collapse: collapse; font-size: 15px; margin: 8px 0; }
table.changes th { text-align: left; font-size: 12px; color: var(--muted); padding: 4px 8px; }
table.changes td { padding: 6px 8px; border-top: 1px solid var(--line); vertical-align: top; }
table.changes .what { color: var(--muted); white-space: nowrap; }
table.changes .old { color: var(--bad); text-decoration: line-through; text-decoration-color: rgba(179,38,30,.5); }
table.changes .new { color: var(--ok); }

/* teacher decision row */
.decide { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 16px; }
.decide form { display: flex; gap: 8px; align-items: center; margin: 0; }
.decide form.reject { flex: 1 1 320px; }
.decide form.reject input { flex: 1; width: auto; min-width: 160px; }
.decide button { white-space: nowrap; }

/* how-it-works (Hindi) */
.howto h3 { text-transform: none; letter-spacing: 0; font-size: 20px; color: var(--fg); }
.howto { font-size: 17px; line-height: 1.7; }
.howto ul { padding-left: 22px; margin: 8px 0 14px; }
.howto li { margin: 6px 0; }
.howto b.ok { color: var(--ok); } .howto b.bad { color: var(--bad); } .howto b.edit { color: var(--edit); }