:root {
  --bg: #0f1115;
  --surface: #181b22;
  --surface-2: #20242c;
  --border: #2a2f39;
  --text: #f0f1f3;
  --text-2: #a8aeb8;
  --text-3: #6c727c;
  --accent: #ff8a3d;
  --accent-soft: rgba(255, 138, 61, 0.14);
  --good: #5fc97e;
  --warn: #f3c950;
  --danger: #e36161;
  --safe-bottom: env(safe-area-inset-bottom);
  --safe-top: env(safe-area-inset-top);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior-y: contain;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}
button { cursor: pointer; -webkit-tap-highlight-color: transparent; }

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

#topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(var(--safe-top) + 12px) 16px 12px;
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
}
#topbar h1 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.iconbtn {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-2);
  border-radius: 10px;
}
.iconbtn:active { background: var(--surface); }

#view {
  flex: 1;
  padding: 16px 16px calc(var(--safe-bottom) + 96px);
  overflow-y: auto;
}

#tabbar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  background: rgba(15, 17, 21, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border);
  padding: 8px 8px calc(var(--safe-bottom) + 8px);
  z-index: 20;
}
#tabbar button {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  color: var(--text-3);
  padding: 6px 0;
  font-size: 11px;
  border-radius: 12px;
}
#tabbar button.active { color: var(--text); }
#tabbar button.primary {
  color: var(--accent);
}

/* sections + cards */
.section { margin-bottom: 28px; }
.section-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 10px;
  padding: 0 4px;
}
.section-head h2 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 10px;
}
.card.empty {
  text-align: center;
  color: var(--text-3);
  padding: 28px 16px;
  font-size: 14px;
}
.card-row {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.card-row:last-child { border-bottom: none; }

/* plan cards */
.plan {
  display: flex; flex-direction: column; gap: 8px;
}
.plan-line { font-size: 16px; line-height: 1.4; color: var(--text); }
.plan-line .keyword { color: var(--accent); font-weight: 600; }
.plan-meta {
  display: flex; align-items: center; gap: 8px;
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-2);
}
.plan-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--text-3); }
.value-tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}
.plan-actions {
  display: flex; gap: 8px;
  margin-top: 8px;
}
.plan-actions button {
  flex: 1;
  padding: 12px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  background: var(--surface-2);
  color: var(--text);
}
.plan-actions button.primary { background: var(--accent); color: #181009; }

/* practice list */
.practice-row {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 8px;
}
.practice-row .label { flex: 1; font-size: 16px; }
.practice-row.done .label { color: var(--text-2); }
.practice-row.done .check { background: var(--good); border-color: var(--good); }
.check {
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.check svg { opacity: 0; }
.practice-row.done .check svg { opacity: 1; }
.practice-row .stepper {
  display: flex; align-items: center; gap: 8px;
}
.practice-row .stepper button {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--surface-2);
  font-weight: 600;
  color: var(--text-2);
}
.practice-row .stepper .v { min-width: 56px; text-align: center; font-variant-numeric: tabular-nums; font-size: 14px; color: var(--text-2); }

/* form */
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  margin-bottom: 8px;
  font-weight: 600;
}
.form-group .hint {
  font-size: 13px;
  color: var(--text-3);
  margin-top: 6px;
  line-height: 1.4;
}
.input, .textarea, .select {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  font-size: 16px;
  color: var(--text);
}
.textarea { resize: none; min-height: 64px; }
.input:focus, .textarea:focus, .select:focus { border-color: var(--accent); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 100%;
  padding: 16px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 14px;
  background: var(--surface-2);
  color: var(--text);
}
.btn.primary { background: var(--accent); color: #181009; }
.btn.ghost { background: transparent; color: var(--text-2); }
.btn.danger { background: transparent; color: var(--danger); }
.btn:disabled { opacity: 0.5; }

.if-sentence {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
}
.if-sentence .kw { color: var(--accent); font-weight: 600; }

/* slider */
.slider-row {
  display: flex; align-items: center; gap: 12px;
  margin-top: 6px;
}
.slider-row input[type=range] { flex: 1; accent-color: var(--accent); }
.slider-row .v { min-width: 44px; text-align: right; font-variant-numeric: tabular-nums; color: var(--text-2); font-size: 14px; }

/* dashboard */
.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  text-align: center;
  margin-bottom: 12px;
}
.kpi .n { font-size: 40px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.kpi .l { font-size: 13px; color: var(--text-2); margin-top: 4px; }

.chart {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 12px;
}
.chart h3 { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.chart .sub { font-size: 12px; color: var(--text-3); margin-bottom: 12px; }
.chart svg { width: 100%; height: 140px; display: block; }

.heat {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-top: 8px;
}
.heat-cell { aspect-ratio: 1; border-radius: 4px; background: var(--surface-2); }
.heat-cell.l1 { background: rgba(95, 201, 126, 0.25); }
.heat-cell.l2 { background: rgba(95, 201, 126, 0.55); }
.heat-cell.l3 { background: var(--good); }

/* notification banner */
.banner {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--text);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.banner button {
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  background: var(--accent);
  color: #181009;
  border-radius: 10px;
}

/* radio chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 14px;
  color: var(--text-2);
}
.chip.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }

/* misc */
.spacer { height: 12px; }
.muted { color: var(--text-3); font-size: 13px; }
.center { text-align: center; }