:root {
  color-scheme: light;
  --bg: #f7f3ec;
  --panel: #fffaf3;
  --text: #1e293b;
  --muted: #6b7280;
  --line: #eadfce;
  --primary: #7c3aed;
  --primary-dark: #6d28d9;
  --accent: #f97316;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --soft: #f1e8ff;
  --shadow: 0 22px 70px rgba(88, 63, 34, 0.14);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(124, 58, 237, 0.18), transparent 26rem),
    radial-gradient(circle at bottom right, rgba(249, 115, 22, 0.16), transparent 24rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button, input, select, textarea { font: inherit; }
button:disabled { cursor: not-allowed; opacity: 0.5; }
.is-busy { cursor: wait !important; }

.busy-message, .sync-hint {
  min-height: 20px;
  margin: 0;
  color: var(--primary);
  font-size: 13px;
  font-weight: 900;
}

.hidden { display: none !important; }

.auth-view { min-height: 100vh; display: grid; place-items: center; padding: 24px; }

.auth-card, .panel, .swipe-card {
  background: rgba(255, 250, 243, 0.94);
  border: 1px solid var(--line);
  border-radius: 30px;
  box-shadow: var(--shadow);
}

.auth-card { width: min(100%, 500px); padding: 36px; }
.auth-card h1, .topbar h1 { margin: 0; letter-spacing: -0.06em; }
.auth-form { display: grid; gap: 16px; margin-top: 24px; }
label { display: grid; gap: 8px; font-weight: 800; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 13px 15px;
  background: white;
  color: var(--text);
}
textarea {
  min-height: 320px;
  margin-top: 16px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  resize: vertical;
}

.auth-actions, .user-panel, .profile-actions, .section-title {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.auth-message { min-height: 22px; color: var(--danger); margin: 0; }

.button, .tab, .nav-item, .link-button, a.button {
  border: 0; cursor: pointer; text-decoration: none; transition: 0.18s ease;
}
.button { border-radius: 999px; padding: 11px 16px; font-weight: 900; }
.button.primary { color: white; background: linear-gradient(135deg, var(--primary), var(--accent)); }
.button.primary:hover { filter: brightness(0.95); }
.button.secondary { color: var(--primary); background: var(--soft); }
.button.ghost { color: var(--primary); background: white; border: 1px solid var(--line); }
.button.danger { color: white; background: var(--danger); }
.link-button { margin-top: 18px; padding: 0; background: transparent; color: var(--primary); font-weight: 900; }

.topbar {
  max-width: 1180px; margin: 0 auto;
  padding: 28px clamp(18px, 4vw, 30px) 12px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
main { max-width: 1180px; margin: 0 auto 112px; padding: 0 clamp(18px, 4vw, 30px); }
.panel { padding: 22px; margin-bottom: 18px; }

.controls {
  display: grid;
  grid-template-columns: minmax(190px, 260px) minmax(0, 1fr) minmax(220px, 320px);
  gap: 18px; align-items: end;
}

.eyebrow {
  margin: 0 0 8px; color: var(--primary);
  font-size: 12px; font-weight: 950; letter-spacing: 0.12em; text-transform: uppercase;
}
.muted, .label { color: var(--muted); }

.tabs { display: flex; gap: 10px; flex-wrap: wrap; }
.tab { padding: 10px 14px; border-radius: 999px; background: #f2eadf; color: #475569; font-weight: 800; }
.tab.active { color: white; background: var(--primary); }

.pill, .tag {
  display: inline-flex; width: fit-content; align-items: center;
  border-radius: 999px; padding: 7px 11px;
  background: var(--soft); color: var(--primary-dark);
  font-size: 12px; font-weight: 950;
}

.screen { display: none; }
.screen.active { display: block; }

.swipe-layout {
  display: grid;
  grid-template-columns: 150px minmax(280px, 540px) 150px;
  justify-content: center; align-items: center;
  gap: 18px; margin-top: 28px; position: relative;
}

.swipe-card {
  min-height: 450px; padding: 34px;
  display: flex; flex-direction: column; justify-content: center;
  position: relative; z-index: 3;
  touch-action: none; user-select: none; overflow: hidden;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
  will-change: transform;
}
.swipe-card.dragging { transition: border-color 0.12s ease, box-shadow 0.12s ease; }
.swipe-card.is-advancing { pointer-events: none; }
.swipe-card.is-advancing::after, .is-busy::after {
  content: ""; display: inline-block; width: 0.8em; height: 0.8em; margin-left: 0.5em;
  border: 2px solid currentColor; border-right-color: transparent;
  border-radius: 999px; animation: spin 0.8s linear infinite;
}
.swipe-card.is-advancing::after { position: absolute; top: 22px; right: 22px; color: var(--primary); }
.swipe-card.swipe-known { border-color: rgba(22, 163, 74, 0.55); box-shadow: 0 24px 76px rgba(22, 163, 74, 0.18); }
.swipe-card.swipe-unknown { border-color: rgba(217, 119, 6, 0.55); box-shadow: 0 24px 76px rgba(217, 119, 6, 0.18); }
.swipe-card h3 { margin: 24px 0 10px; font-size: clamp(42px, 8vw, 76px); line-height: 0.95; letter-spacing: -0.07em; }

.card-word-row, .phrase-title-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }

.speak-btn {
  flex-shrink: 0; border: none; cursor: pointer;
  background: var(--soft); color: var(--primary);
  border-radius: 999px; width: 40px; height: 40px;
  font-size: 18px; display: grid; place-items: center;
  transition: 0.15s ease;
}
.speak-btn:hover { filter: brightness(0.92); }

.word-meta { display: flex; gap: 10px; flex-wrap: wrap; color: var(--primary); font-weight: 900; }
.word-meta span { padding: 6px 10px; border-radius: 999px; background: #fff3e7; }
.meaning { font-size: 22px; color: var(--muted); }
.example { margin-top: 18px; padding-left: 14px; border-left: 4px solid var(--accent); font-size: 18px; }
.card-status { margin-top: 22px; color: var(--muted); font-weight: 900; }
.card-status.known { color: var(--success); }
.card-status.unknown { color: var(--warning); }

.swipe-side {
  min-height: 170px; border: 2px dashed var(--line);
  border-radius: 24px; background: rgba(255, 255, 255, 0.75);
  color: var(--muted); font-weight: 950; position: relative; z-index: 1;
}
.swipe-layout.dragging .swipe-side { pointer-events: none; }
.swipe-side.left:hover { border-color: var(--warning); color: var(--warning); }
.swipe-side.right:hover { border-color: var(--success); color: var(--success); }

.swipe-hint { margin-top: 14px; display: flex; justify-content: center; gap: 20px; color: var(--muted); }
.sync-hint.synced { color: var(--success); }
.sync-hint.syncing { color: var(--primary); }
.sync-hint.local { color: var(--muted); }

.phrase-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 20px; }
.phrase { padding: 18px; border: 1px solid var(--line); border-radius: 22px; background: white; }
.phrase strong { display: block; margin: 14px 0 8px; font-size: 18px; }

.profile-grid, .admin-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 18px; }
.admin-wide { grid-column: 1 / -1; }
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 20px 0; }
.stat { display: block; font-size: 42px; font-weight: 950; letter-spacing: -0.06em; }
.heatmap { display: grid; grid-template-columns: repeat(18, 1fr); gap: 6px; margin-top: 18px; }
.day { aspect-ratio: 1; border-radius: 5px; background: #e5e7eb; }
.day.level-1 { background: #c4b5fd; }
.day.level-2 { background: #8b5cf6; }
.day.level-3 { background: #5b21b6; }

.toggle-row { display: flex; grid-template-columns: auto 1fr; align-items: center; gap: 10px; margin-top: 18px; }
.toggle-row input { width: auto; }

.user-list { display: grid; gap: 10px; margin-top: 16px; }
.user-row {
  display: flex; justify-content: space-between; gap: 12px; align-items: center;
  padding: 12px; border: 1px solid var(--line); border-radius: 16px; background: white;
}
.user-row span { display: block; margin-top: 4px; font-size: 13px; }

.bottom-nav {
  position: fixed; left: 50%; bottom: 18px; transform: translateX(-50%);
  z-index: 10; display: flex; width: min(94vw, 680px); padding: 8px;
  background: rgba(255, 250, 243, 0.9); border: 1px solid var(--line);
  border-radius: 999px; box-shadow: var(--shadow); backdrop-filter: blur(14px);
}
.nav-item { flex: 1; padding: 13px 16px; border-radius: 999px; background: transparent; color: var(--muted); font-weight: 950; }
.nav-item.active { color: white; background: var(--primary); }

@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 900px) {
  .topbar, .controls, .profile-grid, .admin-grid, .phrase-list { grid-template-columns: 1fr; }
  .topbar, .section-title { align-items: flex-start; flex-direction: column; }
  .swipe-layout { grid-template-columns: 1fr; }
  .swipe-side { min-height: 56px; }
  .swipe-card { min-height: 380px; }
}