:root {
  --bg: #fdf6ef;
  --surface: #ffffff;
  --surface-2: #fbeee3;
  --ink: #2b2019;
  --ink-soft: #6b5d52;
  --accent: #b4472e;
  --accent-soft: #f3d9cd;
  --respectful: #2f7d5b;
  --respectful-bg: #e3f2ea;
  --casual: #a65b1f;
  --casual-bg: #f8ead6;
  --neutral: #5566a0;
  --neutral-bg: #e6e9f5;
  --line: #ecdccd;
  --shadow: 0 1px 2px rgba(43, 32, 25, .08), 0 6px 20px rgba(43, 32, 25, .06);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17120e;
    --surface: #221a14;
    --surface-2: #2c221a;
    --ink: #f2e7dc;
    --ink-soft: #b8a798;
    --accent: #e7855f;
    --accent-soft: #4a2f22;
    --respectful: #6cc79a;
    --respectful-bg: #1e3329;
    --casual: #e0a05b;
    --casual-bg: #37291a;
    --neutral: #9aa8dc;
    --neutral-bg: #232842;
    --line: #38291f;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
  }
}

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

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--line);
  padding: calc(env(safe-area-inset-top) + 12px) 0 0;
}
.brand {
  font-size: 1.5rem;
  margin: 0 0 10px;
  letter-spacing: -.02em;
}
.brand-sub {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 3px 8px;
  border-radius: 999px;
  vertical-align: middle;
  margin-left: 6px;
}
.tabs { display: flex; gap: 6px; }
.tab {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-weight: 600;
  padding: 10px 6px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.tab.is-active { color: var(--accent); border-bottom-color: var(--accent); }
.count {
  font-size: .72rem;
  min-width: 20px;
  padding: 1px 6px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

/* Drive sync bar */
.sync-bar {
  border-top: 1px solid var(--line);
  background: var(--surface-2);
}
.sync-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 8px;
  padding-bottom: 8px;
}
.sync-status { display: inline-flex; align-items: center; gap: 8px; font-size: .82rem; color: var(--ink-soft); min-width: 0; }
.sync-status #sync-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sync-dot {
  flex: none;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--ink-soft);
  opacity: .5;
}
.sync-dot.is-ok { background: var(--respectful); opacity: 1; }
.sync-dot.is-busy { background: var(--casual); opacity: 1; animation: pulse 1s ease-in-out infinite; }
.sync-dot.is-error { background: var(--accent); opacity: 1; }
@keyframes pulse { 0%, 100% { opacity: .35; } 50% { opacity: 1; } }
.sync-btn {
  flex: none;
  appearance: none;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  border-radius: 999px;
  padding: 6px 14px;
  font: inherit;
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
}
.sync-btn:hover:not(:disabled) { background: var(--accent); color: #fff; }
.sync-btn:disabled { opacity: .55; cursor: default; }

/* Views */
main { padding-top: 18px; padding-bottom: 40px; min-height: 60vh; }
.view { display: none; }
.view.is-active { display: block; }

/* Category grid */
.category-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
}
.cat-card {
  text-align: left;
  appearance: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform .12s ease, border-color .12s ease;
}
.cat-card:hover, .cat-card:focus-visible { transform: translateY(-2px); border-color: var(--accent); outline: none; }
.cat-card h3 { margin: 0 0 4px; font-size: 1.05rem; }
.cat-card p { margin: 0; font-size: .85rem; color: var(--ink-soft); }
.cat-card .meta { margin-top: 10px; font-size: .78rem; color: var(--accent); font-weight: 600; }

/* Phrase panel */
.panel-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.back-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 14px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.back-btn:hover { border-color: var(--accent); color: var(--accent); }
.panel-title { margin: 0; font-size: 1.25rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}
.card.is-learned { border-color: var(--respectful); background: color-mix(in srgb, var(--respectful-bg) 55%, var(--surface)); }
.card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.gu { font-size: 1.22rem; font-weight: 700; margin: 0; letter-spacing: -.01em; }
.say { margin: 5px 0 0; display: flex; align-items: baseline; gap: 7px; flex-wrap: wrap; }
.say-label {
  font-size: .6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 6px;
  border-radius: 5px;
}
.say-text {
  font-family: ui-monospace, "SFMono-Regular", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: .92rem;
  color: var(--ink);
  letter-spacing: .01em;
}
.speak-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--accent);
  border-radius: 999px;
  width: 30px;
  height: 30px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex: none;
  transition: background .12s ease, border-color .12s ease, color .12s ease;
}
.speak-btn:hover { border-color: var(--accent); background: var(--accent-soft); }
.speak-btn.is-speaking { background: var(--accent); border-color: var(--accent); color: #fff; animation: pulse 1s ease-in-out infinite; }
.en { color: var(--ink-soft); margin: 6px 0 0; font-size: .98rem; }
.badge {
  flex: none;
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 4px 9px;
  border-radius: 999px;
  white-space: nowrap;
}
.badge.respectful { color: var(--respectful); background: var(--respectful-bg); }
.badge.casual { color: var(--casual); background: var(--casual-bg); }
.badge.neutral { color: var(--neutral); background: var(--neutral-bg); }
.note { font-size: .88rem; color: var(--ink-soft); margin: 10px 0 0; }
.example {
  margin: 10px 0 0;
  padding: 10px 12px;
  background: var(--surface-2);
  border-radius: 10px;
  font-size: .9rem;
}
.card-actions { margin-top: 12px; }
.learn-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background .12s ease, color .12s ease, border-color .12s ease;
}
.learn-btn:hover { border-color: var(--respectful); color: var(--respectful); }
.learn-btn.is-on { background: var(--respectful); border-color: var(--respectful); color: #fff; }

/* Vocab log */
.log-panel h2 { margin: 0 0 4px; }
.log-intro { color: var(--ink-soft); margin: 0 0 18px; }
.log-group { margin-bottom: 22px; }
.log-group h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); margin: 0 0 8px; }
.log-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.log-row .lg-gu { font-weight: 700; }
.log-row .lg-en { color: var(--ink-soft); font-size: .9rem; text-align: right; }
.empty {
  text-align: center;
  padding: 48px 16px;
  color: var(--ink-soft);
}
.empty strong { color: var(--ink); }

/* Footer */
.app-footer {
  border-top: 1px solid var(--line);
  padding: 20px 0 calc(env(safe-area-inset-bottom) + 24px);
  color: var(--ink-soft);
  font-size: .85rem;
}
.app-footer p { margin: 0 0 4px; }
.muted { color: var(--ink-soft); opacity: .8; }