:root {
  color-scheme: light dark;
  --bg: #000000;
  --surface: #17181C;
  --surface-2: #202127;
  --surface-3: #2B2C33;
  --text: #FFFFFF;
  --text-dim: #8E8E93;
  --accent: #0A84FF;
  --accent-ink: #FFFFFF;
  --mint: #30D158;
  --coral: #FF453A;
  --line: #2A2A2E;
  --radius: 20px;
  --radius-sm: 14px;
  --font-ui: ui-rounded, 'Baloo 2', 'Be Vietnam Pro', system-ui, -apple-system, sans-serif;
  --font-word: ui-rounded, 'Baloo 2', 'Be Vietnam Pro', system-ui, -apple-system, sans-serif;
  --font-ipa: 'Noto Sans', 'Segoe UI', system-ui, -apple-system, sans-serif;
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
html { scroll-padding-top: env(safe-area-inset-top, 0px); }
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  min-height: 100%;
  -webkit-tap-highlight-color: transparent;
}
#app { max-width: 560px; margin: 0 auto; padding: 14px 16px 32px; }

header.topbar {
  position: sticky; top: env(safe-area-inset-top, 0px);
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  background: var(--bg);
  padding: 10px 0 12px;
  z-index: 40;
}
.topbar-row { display:flex; align-items:center; justify-content:space-between; gap:10px; }
.brand { font-weight: 800; font-size: 17px; letter-spacing: -0.01em; cursor:pointer; display:flex; align-items:center; gap:8px;}
.brand .ico { font-size: 20px; }
.account-bar { display:flex; align-items:center; justify-content:space-between; gap:8px; padding: 5px 2px 2px; }
.account-email { font-size: 12px; color: var(--text-dim); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; flex:1; min-width:0; }
.progress-chip { font-family: var(--font-word); font-size: 12px; color: var(--text-dim); background: var(--surface); border: 1px solid var(--line); padding: 5px 10px; border-radius: 999px; }
.bar-track { height: 6px; background: var(--surface-2); border-radius: 999px; margin-top: 10px; overflow:hidden; }
.part-bar { display:none; gap:4px; margin-top:10px; }
.part-seg {
  position:relative; overflow:hidden; flex:1; height:24px; min-width:0; padding:0;
  border-radius:7px; border:1px solid var(--line); background:var(--surface-2);
  color:var(--text); font-family:var(--font-word); font-size:11px; font-weight:800; cursor:pointer;
}
.part-seg-fill { position:absolute; left:0; top:0; bottom:0; background:var(--mint); opacity:.85; }
.part-seg-label { position:relative; display:flex; align-items:center; justify-content:center; height:100%; }
.part-seg.done { color:#04250F; border-color:transparent; }
.part-seg.current { border:2px solid var(--accent); }
.part-seg.locked { opacity:.55; cursor:not-allowed; color:var(--text-dim); }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--mint)); border-radius:999px; transition: width .4s ease; }

main#screen { padding-top: 6px; }

/* Dashboard */
.hero-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  margin-bottom: 16px;
}
.hero-stat { font-family: var(--font-word); font-size: 40px; font-weight: 700; line-height:1; }
.hero-sub { color: var(--text-dim); font-size: 13px; margin-top: 6px; }
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  border: none; border-radius: var(--radius-sm);
  font-family: var(--font-ui); font-weight: 700; font-size: 15px;
  padding: 14px 18px; cursor: pointer; width: 100%;
  transition: transform .08s ease, opacity .15s ease;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--line); }
.btn-ghost { background: transparent; color: var(--text-dim); border: 1px dashed var(--line); }
.btn-sm { padding: 9px 14px; font-size: 13px; width: auto; }
.btn-row { display:flex; gap:10px; margin-top: 10px; }

.stat-grid { display:grid; grid-template-columns: 1fr 1fr 1fr; gap:10px; margin: 14px 0 18px; }
.stat-box { background: var(--surface); border:1px solid var(--line); border-radius: var(--radius-sm); padding: 12px 10px; text-align:center; }
.stat-box .n { font-family: var(--font-word); font-weight:700; font-size: 20px; }
.stat-box .l { font-size: 11px; color: var(--text-dim); margin-top:2px; }

.searchbox { width:100%; padding: 11px 14px; border-radius: var(--radius-sm); border:1px solid var(--line); background: var(--surface); color: var(--text); font-family: var(--font-ui); font-size:14px; margin-bottom:10px; }
.searchbox:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.search-wrap { position:relative; }
.search-wrap .searchbox { padding-left:38px; }
.search-icon { position:absolute; left:13px; top:50%; transform:translateY(-50%); color:var(--text-dim); pointer-events:none; }
.filter-row { display:flex; gap:6px; margin-bottom: 12px; flex-wrap:wrap; }
.chip-filter { font-size:12px; padding:6px 12px; border-radius:999px; border:1px solid var(--line); background:var(--surface); color:var(--text-dim); cursor:pointer; }
.chip-filter.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight:600; }
.level-row { display:flex; gap:8px; overflow-x:auto; padding-bottom:2px; margin-bottom:14px; }
.level-chip {
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  min-width:56px; flex-shrink:0; padding:9px 10px; border-radius:14px; font-family:var(--font-ui);
  background:var(--surface); border:1px solid var(--line); color:var(--text-dim); cursor:pointer;
}
.level-chip .lc-code { font-family:var(--font-word); font-weight:800; font-size:15px; }
.level-chip .lc-sub { font-size:10.5px; font-weight:600; opacity:.9; margin-top:2px; white-space:nowrap; }
.level-chip.locked { opacity:.6; }
.level-chip.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); opacity:1; }
input[type="range"] { -webkit-appearance:none; appearance:none; height:4px; border-radius:999px; background:var(--surface-3); outline:none; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance:none; width:18px; height:18px; border-radius:50%; background:var(--accent); cursor:pointer; }
input[type="range"]::-moz-range-thumb { width:18px; height:18px; border-radius:50%; background:var(--accent); border:none; cursor:pointer; }
.section-label { font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.05em; color:var(--text-dim); margin: 4px 0 8px; }
.toggle-bar {
  display:flex; align-items:center; gap:2px;
  background:var(--surface-2); border:1px solid var(--line); border-radius: var(--radius-sm);
  padding:4px; margin-bottom:16px;
}
.toggle-btn {
  display:flex; flex:1; align-items:center; justify-content:center; gap:5px; padding:8px 4px; border-radius:9px;
  background:transparent; border:none; color:var(--text-dim); font-family:var(--font-ui);
  font-size:11.5px; font-weight:600; cursor:pointer; white-space:nowrap; min-width:0;
}
.toggle-btn span { overflow:hidden; text-overflow:ellipsis; }
.toggle-btn.active { background:var(--surface); color:var(--accent); box-shadow:0 1px 3px rgba(0,0,0,0.12); }
.toggle-divider { width:1px; align-self:stretch; margin:4px 2px; background:var(--line); flex-shrink:0; }
.sticky-bar {
  position: sticky; z-index: 15;
  top: calc(env(safe-area-inset-top, 0px) + var(--header-h, 74px));
}

.word-list { display:flex; flex-direction:column; gap:6px; }
.preview-row { animation: previewIn .35s ease; }
@keyframes previewIn { from { opacity:0; transform:translateY(6px); } to { opacity:1; transform:translateY(0); } }
.word-row { display:flex; align-items:center; justify-content:space-between; padding:11px 13px; background:var(--surface); border:1px solid var(--line); border-radius: var(--radius-sm); cursor:pointer; }
.word-row .w { font-family: var(--font-word); font-weight:600; font-size:14px; }
.word-row .pos { font-size:11px; color:var(--text-dim); margin-left:6px; }
.word-row .status { font-size:16px; }
.mini-audio-btn {
  display: flex; align-items: center; gap: 4px;
  font-family: var(--font-ui); font-size: 11px; font-weight: 700; color: var(--text-dim);
  padding: 5px 8px; border-radius: 8px;
  background: var(--surface-2); border: 1px solid var(--line);
  cursor: pointer; line-height:1;
}
.mini-audio-btn:active { transform: scale(0.92); }

/* Roadmap */
.roadmap-hero {
  background: linear-gradient(135deg, var(--surface), var(--surface-2));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 20px; margin-bottom: 18px; text-align:center;
}
.roadmap-hero .hero-stat { font-size: 34px; }
.roadmap-overall-track { height: 8px; background: var(--surface-3); border-radius:999px; margin-top:14px; overflow:hidden; }
.roadmap-overall-fill { height:100%; background: linear-gradient(90deg, var(--accent), var(--mint)); border-radius:999px; transition: width .4s ease; }
.roadmap-grid { display:flex; flex-direction:column; gap:12px; }
.day-card {
  position:relative; background: var(--surface); border:1px solid var(--line);
  border-radius: var(--radius); padding: 16px 16px 14px; overflow:hidden;
}
.day-card-top { display:flex; align-items:flex-start; justify-content:space-between; gap:10px; margin-bottom:12px; }
.day-badge {
  width:38px; height:38px; border-radius:11px; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-word); font-weight:800; font-size:15px;
  background: var(--surface-2); border:1px solid var(--line);
}
.day-card.status-done .day-badge { background: var(--mint); color:#04250F; border-color:transparent; }
.day-card.status-progress .day-badge { background: #FF9F0A; color:#2B1900; border-color:transparent; }
.day-title-wrap { display:flex; align-items:center; gap:10px; }
.day-title { font-weight:800; font-size:15px; }
.day-range { font-size:11.5px; color:var(--text-dim); margin-top:2px; font-family:var(--font-word); }
.day-status-pill {
  font-size:11px; font-weight:700; padding:4px 10px; border-radius:999px; white-space:nowrap;
}
.day-status-pill.status-done { background: rgba(48,209,88,0.15); color: var(--mint); }
.day-status-pill.status-progress { background: rgba(255,159,10,0.15); color: #FF9F0A; }
.day-status-pill.status-new { background: var(--surface-2); color: var(--text-dim); }
.day-progress-row { display:flex; align-items:center; gap:8px; margin-bottom:12px; }
.day-progress-row .bar-track { flex:1; margin:0; }
.day-progress-pct { font-size:12px; font-weight:700; color:var(--text-dim); min-width:32px; text-align:right; }
.day-card-actions { display:flex; gap:8px; }

@media (min-width: 720px) {
  .roadmap-grid { display:grid; grid-template-columns: 1fr 1fr; gap:12px; }
  .day-card:hover { border-color: var(--accent); }
}
@media (min-width: 1040px) {
  .roadmap-grid { grid-template-columns: 1fr 1fr 1fr; }
}

.theme-menu {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: 50;
  flex-direction: column; gap: 2px; min-width: 190px;
  max-height: min(60vh, 340px); overflow-y: auto;
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 6px; box-shadow: 0 14px 34px -12px rgba(0,0,0,0.4);
}
.theme-menu-item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 9px 10px; border-radius: 10px; background: none; border: none;
  color: var(--text); font-family: var(--font-ui); font-size: 13.5px; font-weight: 600;
  cursor: pointer; text-align: left;
}
.theme-menu-item:hover { background: var(--surface-2); }
.theme-menu-item.active { color: var(--accent); }
.theme-menu-item .swatch-dot { border-radius: 50%; flex-shrink: 0; border: 1px solid rgba(0,0,0,0.15); }