* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; user-select: none; -webkit-touch-callout: none; }

:root {
  --bg: #0d0d0d;
  --card: #1a1a1a;
  --accent: #00e5ff;
  --green: #00e676;
  --text: #ffffff;
  --muted: #888;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', Arial, sans-serif;
  overflow: hidden;
  touch-action: none;
}

/* ── MAIN APP ── */
#app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  padding: 0;
}

/* ── TOP ROW ── */
#top-row {
  display: flex;
  align-items: stretch;
  gap: 12px;
  padding: 12px 16px 4px;
  flex-shrink: 0;
}

/* ── CHART ── */
#chart-wrap {
  flex: 1;
  background: #1a1a1a;
  border-radius: 14px;
  padding: 10px 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
#chart-title {
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
#progress-chart {
  width: 100%;
  height: 70px;
  display: block;
}
#chart-hint {
  font-size: 0.7rem;
  color: #444;
  text-align: center;
  padding: 8px 0 4px;
}

/* ── BEST BAR ── */
#best-bar {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: #1a1a1a;
  border-radius: 14px;
  padding: 10px 16px;
  flex-shrink: 0;
  gap: 4px;
}
#best-label {
  font-size: 0.65rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
#best-time {
  font-size: 1.1rem;
  font-weight: bold;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

/* ── TIMER DISPLAY ── */
#timer-display {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 24px 24px;
}
#timer-text {
  font-size: clamp(3.5rem, 16vw, 7rem);
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  letter-spacing: -2px;
  color: var(--text);
  line-height: 1;
  transition: color 0.2s;
}
#hint {
  margin-top: 14px;
  font-size: 1rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

/* ── SOLVES SECTION ── */
#solves-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0 16px 16px;
}
#solves-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 8px 10px;
  font-size: 0.9rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  flex-shrink: 0;
}
#clear-btn {
  background: none;
  border: 1px solid #333;
  color: var(--muted);
  border-radius: 8px;
  padding: 4px 12px;
  font-size: 0.8rem;
  cursor: pointer;
}
#clear-btn:active { opacity: 0.6; }

#solves-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.solve-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--card);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 1rem;
  flex-shrink: 0;
}
.solve-row.best {
  border: 2px solid var(--accent);
}
.solve-num { color: var(--muted); font-size: 0.85rem; }
.solve-time {
  font-size: 1.3rem;
  font-weight: bold;
  font-variant-numeric: tabular-nums;
  color: var(--text);
}
.solve-row.best .solve-time { color: var(--accent); }
.solve-del {
  background: none;
  border: none;
  color: #555;
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 8px;
}
.solve-del:active { color: #f44336; }

/* ── HOLD OVERLAY ── */
#hold-overlay {
  position: fixed; inset: 0;
  background: #003300;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  transition: background 0.3s;
  z-index: 10;
}
#hold-overlay.green { background: var(--green); }
#hold-text {
  font-size: 2rem;
  font-weight: bold;
  color: rgba(0,0,0,0.5);
  letter-spacing: 0.05em;
}
.hidden { display: none !important; }

/* ── RUNNING OVERLAY ── */
#run-overlay {
  position: fixed; inset: 0;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 20;
  cursor: pointer;
}
#run-timer {
  font-size: clamp(4rem, 20vw, 10rem);
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  letter-spacing: -3px;
  color: var(--text);
  line-height: 1;
}
#run-hint {
  margin-top: 24px;
  font-size: 1rem;
  color: var(--muted);
}

/* Scrollbar styling */
#solves-list::-webkit-scrollbar { width: 4px; }
#solves-list::-webkit-scrollbar-track { background: transparent; }
#solves-list::-webkit-scrollbar-thumb { background: #333; border-radius: 4px; }