/* ==================== BASE ==================== */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #14141f;
  --bg-tertiary: #1e1e2e;
  --bg-card: #1a1a2e;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent-work: #00d4ff;       /* cyan */
  --accent-break: #00ff88;      /* green */
  --accent-long: #ff3df5;       /* magenta */
  --focus-ring: #00d4ff;
  --focus-glow: rgba(0, 212, 255, 0.4);
  --danger: #ff4466;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  width: 600px;
  height: 600px;
  overflow: hidden;
}

#app { width: 100%; height: 100%; position: relative; }

/* --- Screens --- */
.screen {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 0;
  left: 0;
}
.screen.hidden { display: none; }

/* --- Header --- */
.header {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  background: var(--bg-secondary);
  gap: 12px;
  flex-shrink: 0;
}
.header h1 { font-size: 22px; font-weight: 600; flex: 1; }
.header-meta { font-size: 13px; color: var(--text-secondary); }
.back-btn {
  background: transparent;
  color: var(--text-primary);
  font-size: 22px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
}

/* --- Content --- */
.content {
  flex: 1;
  padding: 16px 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* --- Focus States --- */
.focusable {
  transition: all 0.15s ease;
  border: 2px solid transparent;
  cursor: pointer;
  min-height: 44px;
}
.focusable:focus {
  outline: none;
  border-color: var(--focus-ring);
  box-shadow: 0 0 20px var(--focus-glow);
}

/* --- Nav Bar --- */
.nav-bar {
  display: flex;
  gap: 8px;
  padding: 12px 20px;
  background: var(--bg-secondary);
  flex-shrink: 0;
}
.nav-item {
  flex: 1;
  padding: 14px 10px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.nav-item:focus { background: var(--bg-card); }
.nav-item.primary {
  background: var(--accent-work);
  color: var(--bg-primary);
}
.nav-item.primary:focus { background: #33ddff; }

.hidden { display: none !important; }

/* ==================== POMODORO-SPECIFIC ==================== */

.home-content {
  justify-content: center;
  align-items: center;
  gap: 20px;
  padding: 20px;
}

/* Phase badge */
.phase-badge {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 4px;
  padding: 6px 20px;
  border-radius: 20px;
  border: 2px solid var(--accent-work);
  color: var(--accent-work);
  text-transform: uppercase;
  transition: color 0.3s, border-color 0.3s;
}

/* Big timer */
.timer-display {
  font-size: 120px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -2px;
  color: var(--accent-work);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
  text-shadow: 0 0 40px rgba(0, 212, 255, 0.25);
  transition: color 0.3s, text-shadow 0.3s;
}

/* Phase accents applied to body */
body.phase-work .phase-badge { border-color: var(--accent-work); color: var(--accent-work); }
body.phase-work .timer-display { color: var(--accent-work); text-shadow: 0 0 40px rgba(0, 212, 255, 0.25); }
body.phase-work .nav-item.primary { background: var(--accent-work); color: var(--bg-primary); }

body.phase-break .phase-badge { border-color: var(--accent-break); color: var(--accent-break); }
body.phase-break .timer-display { color: var(--accent-break); text-shadow: 0 0 40px rgba(0, 255, 136, 0.25); }
body.phase-break .nav-item.primary { background: var(--accent-break); color: var(--bg-primary); }

body.phase-long .phase-badge { border-color: var(--accent-long); color: var(--accent-long); }
body.phase-long .timer-display { color: var(--accent-long); text-shadow: 0 0 40px rgba(255, 61, 245, 0.25); }
body.phase-long .nav-item.primary { background: var(--accent-long); color: var(--bg-primary); }

/* Cycle dots (4 work sessions per cycle) */
.cycle-dots {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}
.cycle-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: 2px solid var(--text-muted);
  transition: background 0.3s, border-color 0.3s;
}
.cycle-dot.complete {
  background: var(--accent-work);
  border-color: var(--accent-work);
}
body.phase-break .cycle-dot.complete,
body.phase-long .cycle-dot.complete {
  background: var(--accent-work);
  border-color: var(--accent-work);
}

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: flex-start;
  min-height: 110px;
  justify-content: center;
}
.stat-card-wide {
  grid-column: span 2;
  align-items: center;
  text-align: center;
}
.stat-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.8px;
  text-transform: uppercase;
}
.stat-value {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent-work);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.stat-card-wide .stat-value { font-size: 32px; }

.stats-actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
}
.stats-actions .nav-item {
  background: var(--bg-tertiary);
}