:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --text: #1c1c1e;
  --muted: #6e6e73;
  --border: #e3e1dc;
  --accent: #3b5bdb;
  --accent-text: #ffffff;
  --accent-soft: #e7ecff;
  --danger: #c92a2a;
  --good: #2b8a3e;
  --radius: 14px;
  --tabbar-h: 58px;
  --player-h: 64px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171a;
    --surface: #222226;
    --text: #f2f2f4;
    --muted: #9a9aa2;
    --border: #34343a;
    --accent: #7c93ff;
    --accent-text: #0e0e12;
    --accent-soft: #2a2f4a;
    --danger: #ff6b6b;
    --good: #69db7c;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Apple SD Gothic Neo", "Noto Sans CJK JP", sans-serif;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}
[hidden] { display: none !important; }
button, input, select { font: inherit; color: inherit; }
code { font-size: 0.9em; }

.screen { min-height: 100dvh; }

/* ---------- login ---------- */
#login { display: grid; place-items: center; padding: 16px; }
.login-card {
  width: 100%; max-width: 360px; display: grid; gap: 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 20px;
  text-align: center;
}
.login-card h1 { margin: 0; font-size: 1.3rem; }
.login-card label { text-align: left; }
.logo {
  width: 64px; height: 64px; margin: 0 auto; border-radius: 16px; display: grid; place-items: center;
  background: var(--accent); color: var(--accent-text); font-size: 34px; font-weight: 700;
}

/* ---------- layout ---------- */
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: calc(env(safe-area-inset-top) + 10px) 16px 10px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
main {
  max-width: 680px; margin: 0 auto;
  padding: 4px 16px calc(var(--tabbar-h) + var(--player-h) + env(safe-area-inset-bottom) + 24px);
}
.view { display: grid; gap: 14px; }

.lang-switch { display: inline-flex; background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 3px; }
.lang-switch button { border: 0; background: none; padding: 6px 14px; border-radius: 999px; font-weight: 600; cursor: pointer; }
.lang-switch button[aria-selected="true"] { background: var(--accent); color: var(--accent-text); }

.badge { font-size: 0.8rem; font-weight: 600; padding: 3px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }

.card, fieldset.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; margin: 0;
}
fieldset.card { display: grid; gap: 12px; margin-bottom: 14px; }
legend { font-weight: 700; padding: 0 4px; }
label { display: grid; gap: 4px; font-size: 0.9rem; font-weight: 500; }
label.check { display: flex; align-items: center; gap: 8px; }
input[type="text"], input[type="url"], input[type="password"], input[type="number"], select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--bg);
  font-size: 16px; /* prevents iOS zoom on focus */
}
.row { display: flex; gap: 8px; align-items: center; }
.row.wrap { flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; margin: 0; }
.error { color: var(--danger); margin: 0; min-height: 1.2em; }
.empty { text-align: center; color: var(--muted); padding: 24px 8px; }

.btn {
  border: 1px solid var(--border); background: var(--surface); padding: 10px 14px; border-radius: 10px;
  font-weight: 600; cursor: pointer; white-space: nowrap;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.block { width: 100%; }
.btn.icon { padding: 10px 12px; min-width: 44px; }
.btn.danger { color: var(--danger); }
.btn:disabled { opacity: 0.55; cursor: default; }
.btn:active:not(:disabled) { transform: scale(0.97); }

.new-story { display: grid; gap: 10px; }
.new-story .row .btn { flex: 1; }

.filter-row { display: flex; gap: 8px; }
.chip { border: 1px solid var(--border); background: var(--surface); padding: 5px 12px; border-radius: 999px; font-size: 0.85rem; cursor: pointer; }
.chip.active { background: var(--text); color: var(--bg); border-color: var(--text); }

/* ---------- story list ---------- */
.story-list, .word-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.story-item {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); cursor: pointer;
}
.story-item.playing { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.story-item .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); flex: none; }
.story-item.heard .dot { background: transparent; border: 1.5px solid var(--border); }
.story-item .info { flex: 1; min-width: 0; }
.story-item .t { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.story-item .m { font-size: 0.8rem; color: var(--muted); }
.story-item .play {
  flex: none; width: 40px; height: 40px; border-radius: 50%; border: 0;
  background: var(--accent-soft); color: var(--accent); font-size: 15px; cursor: pointer;
}
.story-item .play:disabled { opacity: 0.4; }

/* ---------- story detail ---------- */
.back { border: 0; background: none; color: var(--accent); font-weight: 600; padding: 4px 0; justify-self: start; cursor: pointer; }
.story { display: grid; gap: 12px; }
.story h2 { margin: 0; font-size: 1.5rem; line-height: 1.3; }
details { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 0 14px; }
summary { padding: 12px 0; font-weight: 600; cursor: pointer; }
.story-text { padding-bottom: 14px; font-size: 1.15rem; line-height: 1.9; }
.story-text p { margin: 0 0 0.9em; }
.story-text.translation { font-size: 1rem; line-height: 1.6; color: var(--muted); }
.story-text mark { background: var(--accent-soft); color: inherit; border-radius: 4px; padding: 0 2px; }
.glossary { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; margin: 0; padding-bottom: 14px; }
.glossary dt { font-weight: 700; font-size: 1.05rem; }
.glossary dt small { display: block; font-weight: 400; color: var(--muted); font-size: 0.8rem; }
.glossary dd { margin: 0; align-self: center; }

.word-list li {
  display: flex; justify-content: space-between; gap: 12px; padding: 10px 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
}
.word-list .w { font-weight: 600; }
.word-list .mn { color: var(--muted); font-size: 0.9rem; text-align: right; }

/* ---------- player + tab bar ---------- */
.player {
  position: fixed; left: 8px; right: 8px; z-index: 10;
  bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom) + 8px);
  max-width: 664px; margin: 0 auto;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 6px 24px rgb(0 0 0 / 0.12); overflow: hidden;
}
.progress { height: 3px; background: var(--border); }
#progress-bar { height: 100%; width: 0; background: var(--accent); }
.player-row { display: flex; align-items: center; gap: 4px; padding: 6px 8px; height: calc(var(--player-h) - 3px); }
.p-title {
  flex: 1; min-width: 0; text-align: left; border: 0; background: none; font-weight: 600; cursor: pointer;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding: 0 6px;
}
.p-btn { border: 0; background: none; min-width: 40px; height: 44px; border-radius: 10px; font-size: 0.85rem; font-weight: 600; cursor: pointer; }
.p-btn.big { width: 48px; height: 48px; border-radius: 50%; background: var(--accent); color: var(--accent-text); font-size: 18px; }

.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
  display: flex; justify-content: space-around;
  padding: 6px 8px calc(env(safe-area-inset-bottom) + 6px);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
}
.tabbar button {
  flex: 1; border: 0; background: none; display: grid; justify-items: center; gap: 2px;
  font-size: 0.72rem; color: var(--muted); padding: 4px; cursor: pointer;
}
.tabbar button span { font-size: 1.25rem; line-height: 1; }
.tabbar button.active { color: var(--accent); font-weight: 600; }

.worker-status { margin: 0; color: var(--muted); }
.worker-status.online { color: var(--good); }