/* Study notes: one stylesheet for every page. Colours are tokens so dark mode is a swap. */
:root {
  --bg: #f7f5f0;
  --surface: #ffffff;
  --text: #1f1d1a;
  --muted: #6b665e;
  --line: #e2ddd3;
  --accent: #b3401c;       /* God of War red-orange */
  --accent-soft: #fbe9e2;
  --ok: #2f7d4f;
  --ok-soft: #e3f3e9;
  --warn: #8a5a00;
  --warn-soft: #fff3d6;
  --code-bg: #f0ece4;
  --radius: 10px;
  --on-accent: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15140f;
    --surface: #1f1d18;
    --text: #ece8df;
    --muted: #a39d92;
    --line: #34312a;
    --accent: #ff8a5c;
    --accent-soft: #3a2118;
    --ok: #6fcf97;
    --ok-soft: #1b3326;
    --warn: #f2c14e;
    --warn-soft: #362b12;
    --code-bg: #29261f;
    --on-accent: #1a0f0a;
  }
}
:root[data-theme="dark"] {
  --bg: #15140f; --surface: #1f1d18; --text: #ece8df; --muted: #a39d92; --line: #34312a;
  --accent: #ff8a5c; --accent-soft: #3a2118; --ok: #6fcf97; --ok-soft: #1b3326;
  --warn: #f2c14e; --warn-soft: #362b12; --code-bg: #29261f; --on-accent: #1a0f0a;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 44rem; margin: 0 auto; padding: 1rem 16px 4rem; }

/* Top bar: breadcrumb back to home and the category */
.top {
  position: sticky; top: 0; z-index: 5;
  display: flex; gap: .5rem; align-items: center; flex-wrap: wrap;
  padding: .6rem 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  font-size: .9rem;
}
.top a { color: var(--accent); text-decoration: none; font-weight: 600; }
.top span { color: var(--muted); }

h1 { font-size: 1.7rem; line-height: 1.25; margin: 1rem 0 .25rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 .5rem; padding-top: .5rem; border-top: 1px solid var(--line); }
h3 { font-size: 1.05rem; margin: 1.4rem 0 .4rem; }
.meta { color: var(--muted); font-size: .9rem; margin: 0 0 1rem; }
a { color: var(--accent); }
ul, ol { padding-left: 1.3rem; }
li { margin: .25rem 0; }

code {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: .88em;
  background: var(--code-bg);
  padding: .08em .3em;
  border-radius: 4px;
  overflow-wrap: anywhere;
}
pre {
  background: var(--code-bg);
  padding: .8rem;
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: .85rem;
  line-height: 1.45;
}
pre code { background: none; padding: 0; font-size: inherit; overflow-wrap: normal; }

/* Tables scroll sideways on a phone instead of breaking the page */
.table-wrap { overflow-x: auto; margin: .8rem 0; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { border: 1px solid var(--line); padding: .45rem .55rem; text-align: left; vertical-align: top; }
th { background: var(--surface); }

/* Callout boxes */
.box { border-radius: var(--radius); padding: .8rem 1rem; margin: 1rem 0; border-left: 4px solid; }
.box > :first-child { margin-top: 0; }
.box > :last-child { margin-bottom: 0; }
.box .label { display: block; font-size: .75rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; margin-bottom: .3rem; }
.tldr { background: var(--accent-soft); border-color: var(--accent); }
.tldr .label { color: var(--accent); }
.say { background: var(--ok-soft); border-color: var(--ok); }
.say .label { color: var(--ok); }
.warn { background: var(--warn-soft); border-color: var(--warn); }
.warn .label { color: var(--warn); }
.yours { background: var(--surface); border-color: var(--muted); border: 1px solid var(--line); border-left: 4px solid var(--muted); }
.yours .label { color: var(--muted); }

/* Quiz: tap a question to reveal the answer */
.quiz h2 { color: var(--accent); }
details.q {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin: .6rem 0;
}
details.q > summary {
  cursor: pointer;
  padding: .75rem 1rem;
  font-weight: 600;
  list-style: none;
}
details.q > summary::-webkit-details-marker { display: none; }
details.q > summary::before { content: "Q "; color: var(--accent); font-weight: 800; }
details.q[open] > summary { border-bottom: 1px dashed var(--line); }
details.q .a { padding: .6rem 1rem .8rem; }
details.q .a > :first-child { margin-top: 0; }
details.q .a > :last-child { margin-bottom: 0; }
.hint { color: var(--muted); font-size: .85rem; }

/* Cards on the home page and category pages */
.cards { display: grid; gap: .75rem; grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr)); margin: 1rem 0; }
.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .9rem 1rem;
  text-decoration: none;
  color: var(--text);
}
.card:hover { border-color: var(--accent); }
.card strong { display: block; font-size: 1.05rem; color: var(--accent); }
.card small { color: var(--muted); display: block; margin-top: .2rem; }
.card .progress { margin-top: .5rem; font-size: .8rem; color: var(--ok); font-weight: 600; }

.topic-list { list-style: none; padding: 0; }
.topic-list li { margin: .5rem 0; }
.topic-list a {
  display: flex; gap: .6rem; align-items: baseline;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .7rem .9rem;
  text-decoration: none;
  color: var(--text);
}
.topic-list a::before { content: "○"; color: var(--muted); }
.topic-list a.learned::before { content: "✓"; color: var(--ok); font-weight: 800; }
.topic-list .sub { display: block; color: var(--muted); font-size: .85rem; }

/* Buttons */
.btn {
  display: inline-block;
  font: inherit; font-weight: 600;
  background: var(--accent); color: var(--on-accent);
  border: 0; border-radius: var(--radius);
  padding: .6rem 1rem;
  cursor: pointer; text-decoration: none;
}
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn.done { background: var(--ok); color: var(--on-accent); }
.page-end { display: flex; flex-wrap: wrap; gap: .6rem; justify-content: space-between; align-items: center; margin-top: 2.5rem; }
.pager { display: flex; gap: .6rem; flex-wrap: wrap; }