/* ============================================================
   CSS カスタムプロパティ（ライトモード）
   ============================================================ */
:root {
  --color-primary:       #3b82f6;
  --color-primary-dark:  #2563eb;
  --color-primary-light: #eff6ff;
  --color-danger:        #ef4444;
  --color-success:       #22c55e;
  --color-warning:       #f59e0b;

  --cat-study:         #3b82f6;
  --cat-commute-study: #0ea5e9;
  --cat-commute:       #f59e0b;
  --cat-sleep:         #8b5cf6;
  --cat-exercise:      #22c55e;
  --cat-class:         #ef4444;
  --cat-free:          #ec4899;
  --cat-other:         #6b7280;

  --bg-app:       #f1f5f9;
  --bg-card:      #ffffff;
  --bg-header:    #ffffff;
  --bg-input:     #f8fafc;
  --bg-hover:     #f1f5f9;
  --bg-modal:     rgba(0,0,0,0.5);

  --text-primary:   #1e293b;
  --text-secondary: #64748b;
  --text-muted:     #94a3b8;

  --border-color:     #e2e8f0;
  --border-radius:    12px;
  --border-radius-sm: 8px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

  --slot-height: 2px;   /* 1分あたり2px（24h = 2880px） */
  --transition: 0.2s ease;
}

[data-theme="dark"] {
  --bg-app:       #0f172a;
  --bg-card:      #1e293b;
  --bg-header:    #1e293b;
  --bg-input:     #0f172a;
  --bg-hover:     #334155;
  --bg-modal:     rgba(0,0,0,0.7);
  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted:     #64748b;
  --border-color:   #334155;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
  --color-primary-light: #1e3a5f;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  background: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}
button { cursor: pointer; border: none; background: none; font-family: inherit; -webkit-tap-highlight-color: transparent; }
input, select, textarea { font-family: inherit; font-size: 1rem; }

/* ============================================================ Header */
.app-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; max-width: 768px; margin: 0 auto;
}
.app-title {
  font-size: 1.2rem; font-weight: 700; color: var(--color-primary);
  display: flex; align-items: center; gap: 6px;
}
.title-icon { font-size: 1.3rem; }
.header-right { display: flex; align-items: center; gap: 10px; }
.current-time-value {
  font-size: 0.95rem; font-weight: 600; color: var(--color-primary);
  font-variant-numeric: tabular-nums; letter-spacing: 0.5px;
}
.icon-btn {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; background: var(--bg-hover);
  transition: background var(--transition);
}
.icon-btn:hover { background: var(--border-color); }

/* Date Nav */
.date-nav {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; padding: 8px 16px 10px;
  max-width: 768px; margin: 0 auto; position: relative;
}
.date-nav-btn {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--bg-hover); color: var(--text-primary);
  font-size: 0.85rem; display: flex; align-items: center; justify-content: center;
  transition: background var(--transition); flex-shrink: 0;
}
.date-nav-btn:hover { background: var(--color-primary); color: #fff; }
.date-display-btn {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 20px;
  background: var(--color-primary-light); color: var(--color-primary);
  font-size: 1rem; font-weight: 700;
  border: 2px solid var(--color-primary);
  transition: all var(--transition); flex: 1; justify-content: center; max-width: 220px;
}
.date-display-btn:hover { background: var(--color-primary); color: #fff; }
.today-badge {
  font-size: 0.7rem; background: var(--color-primary); color: #fff;
  padding: 1px 7px; border-radius: 10px; font-weight: 600;
}
.date-display-btn:hover .today-badge { background: rgba(255,255,255,0.3); }
.go-today-btn {
  padding: 6px 12px; border-radius: 16px;
  background: var(--bg-hover); color: var(--text-secondary);
  font-size: 0.8rem; font-weight: 600;
  transition: all var(--transition); white-space: nowrap;
}
.go-today-btn:hover { background: var(--color-primary); color: #fff; }

/* Calendar Picker */
.calendar-picker {
  position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  z-index: 200; background: var(--bg-card);
  border: 1px solid var(--border-color); border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg); padding: 12px;
  width: min(320px, 95vw);
}
.cal-picker-header {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px;
}
.cal-picker-nav {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--bg-hover); color: var(--text-primary); font-size: 0.8rem;
  display: flex; align-items: center; justify-content: center;
}
.cal-picker-nav:hover { background: var(--color-primary); color: #fff; }
.cal-picker-month { font-weight: 700; font-size: 0.95rem; color: var(--text-primary); }
.cal-picker-weekdays {
  display: grid; grid-template-columns: repeat(7, 1fr);
  text-align: center; font-size: 0.75rem; color: var(--text-muted); margin-bottom: 4px;
}
.cal-picker-weekdays span:first-child { color: #ef4444; }
.cal-picker-weekdays span:last-child  { color: var(--color-primary); }
.cal-picker-days { display: grid; grid-template-columns: repeat(7, 1fr); gap: 2px; }
.cal-picker-day {
  aspect-ratio: 1; display: flex; align-items: center; justify-content: center;
  border-radius: 50%; font-size: 0.85rem; cursor: pointer;
  transition: background var(--transition); color: var(--text-primary); position: relative;
}
.cal-picker-day:hover { background: var(--bg-hover); }
.cal-picker-day.is-today { font-weight: 700; color: var(--color-primary); }
.cal-picker-day.is-selected { background: var(--color-primary); color: #fff; }
.cal-picker-day.is-other-month { color: var(--text-muted); }
.cal-picker-day.is-sunday { color: #ef4444; }
.cal-picker-day.is-saturday { color: var(--color-primary); }
.cal-picker-day.has-data::after {
  content: ''; display: block; width: 4px; height: 4px; border-radius: 50%;
  background: var(--color-primary); position: absolute; bottom: 3px; left: 50%; transform: translateX(-50%);
}

/* ============================================================ Main */
.app-main { max-width: 768px; margin: 0 auto; padding: 12px 12px 80px; }

.fab-btn {
  position: fixed; bottom: 24px; right: 20px; z-index: 90;
  width: 56px; height: 56px; border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff; font-size: 1.5rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(59,130,246,0.4);
  transition: transform var(--transition), box-shadow var(--transition);
}
.fab-btn:hover { transform: scale(1.08); box-shadow: 0 6px 20px rgba(59,130,246,0.5); }
.fab-btn:active { transform: scale(0.95); }
.fab-icon { line-height: 1; }

/* ============================================================ Tabs */
.tab-nav {
  display: flex; gap: 4px; background: var(--bg-card);
  border-radius: var(--border-radius); padding: 4px;
  margin-bottom: 12px; box-shadow: var(--shadow-sm);
}
.tab-btn {
  flex: 1; padding: 8px 4px; border-radius: var(--border-radius-sm);
  font-size: 0.9rem; font-weight: 600; color: var(--text-secondary);
  transition: all var(--transition); text-align: center;
}
.tab-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.tab-btn.is-active { background: var(--color-primary); color: #fff; box-shadow: 0 2px 8px rgba(59,130,246,0.3); }
.tab-panel { display: none; }
.tab-panel.is-active { display: block; }

/* ============================================================ Study Dashboard */
.study-dashboard { margin-bottom: 16px; }

.study-main-card {
  background: linear-gradient(135deg, #2563eb 0%, #3b82f6 50%, #60a5fa 100%);
  border-radius: var(--border-radius); padding: 18px 20px; color: #fff;
  margin-bottom: 12px; box-shadow: 0 4px 16px rgba(59,130,246,0.35);
  position: relative; overflow: hidden;
}
.study-main-card::before {
  content: ''; position: absolute; top: -30px; right: -30px;
  width: 120px; height: 120px; border-radius: 50%; background: rgba(255,255,255,0.1);
}
.study-main-card__header {
  display: flex; align-items: center; gap: 8px; margin-bottom: 8px;
}
.study-main-card__icon { font-size: 1.4rem; }
.study-main-card__title { font-size: 0.9rem; font-weight: 600; opacity: 0.9; flex: 1; }
.study-goal-wrap { display: flex; align-items: center; gap: 6px; }
.study-goal-label { font-size: 0.75rem; opacity: 0.8; }
.goal-edit-btn {
  display: flex; align-items: center; gap: 4px;
  background: rgba(255,255,255,0.2); border-radius: 12px;
  padding: 2px 8px; font-size: 0.8rem; color: #fff;
  transition: background var(--transition);
}
.goal-edit-btn:hover { background: rgba(255,255,255,0.35); }
.goal-edit-icon { font-size: 0.75rem; opacity: 0.8; }
.study-main-card__value {
  display: flex; align-items: baseline; gap: 4px; margin-bottom: 10px;
}
.study-hours-big { font-size: 3rem; font-weight: 800; line-height: 1; font-variant-numeric: tabular-nums; }
.study-mins-big  { font-size: 2rem; font-weight: 700; line-height: 1; font-variant-numeric: tabular-nums; }
.study-unit { font-size: 1rem; font-weight: 500; opacity: 0.85; margin-right: 4px; }
.study-progress-wrap { margin-bottom: 10px; }
.study-progress-bar { height: 8px; background: rgba(255,255,255,0.25); border-radius: 4px; overflow: hidden; margin-bottom: 4px; }
.study-progress-fill { height: 100%; background: #fff; border-radius: 4px; transition: width 0.5s ease; max-width: 100%; }
.study-goal-diff { font-size: 0.8rem; opacity: 0.85; }
.study-breakdown { display: flex; gap: 16px; flex-wrap: wrap; }
.study-breakdown-item { display: flex; align-items: center; gap: 5px; font-size: 0.8rem; opacity: 0.9; }
.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot-study         { background: #fff; }
.dot-commute-study { background: #bae6fd; }

.dash-sub-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 10px; }
.dash-card {
  background: var(--bg-card); border-radius: var(--border-radius); padding: 14px;
  box-shadow: var(--shadow-sm); border-left: 4px solid transparent;
  transition: box-shadow var(--transition);
}
.dash-card:hover { box-shadow: var(--shadow-md); }
.dash-card--commute { border-left-color: var(--cat-commute); }
.dash-card--sleep   { border-left-color: var(--cat-sleep); }
.dash-card__icon { font-size: 1.3rem; margin-bottom: 4px; }
.dash-card__label { font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 4px; }
.dash-card__value { display: flex; align-items: baseline; gap: 2px; }
.dash-card__hours   { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); font-variant-numeric: tabular-nums; }
.dash-card__minutes { font-size: 1.1rem; font-weight: 600; color: var(--text-primary); font-variant-numeric: tabular-nums; }
.dash-card__unit { font-size: 0.75rem; color: var(--text-secondary); margin-right: 2px; }
.dash-card__bar-wrap { height: 4px; background: var(--bg-hover); border-radius: 2px; margin-top: 8px; overflow: hidden; }
.dash-card__bar { height: 100%; border-radius: 2px; transition: width 0.5s ease; max-width: 100%; }
.dash-card--commute .dash-card__bar { background: var(--cat-commute); }
.dash-card--sleep   .dash-card__bar { background: var(--cat-sleep); }

.study-stats-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 10px; }
.study-stat-card {
  background: var(--bg-card); border-radius: var(--border-radius); padding: 12px 14px;
  box-shadow: var(--shadow-sm); text-align: center;
}
.study-stat-label { font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 4px; }
.study-stat-value { font-size: 1.2rem; font-weight: 700; color: var(--color-primary); }

.dash-all-section {
  background: var(--bg-card); border-radius: var(--border-radius); padding: 14px; box-shadow: var(--shadow-sm);
}
.dash-all-title { font-size: 0.85rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.dash-all-list { display: flex; flex-direction: column; gap: 6px; }
.dash-all-row { display: grid; grid-template-columns: 12px 100px 1fr 60px; align-items: center; gap: 8px; }
.dash-all-row.is-zero { opacity: 0.4; }
.dash-all-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.dash-all-name { font-size: 0.82rem; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dash-all-bar-wrap { height: 6px; background: var(--bg-hover); border-radius: 3px; overflow: hidden; }
.dash-all-bar { height: 100%; border-radius: 3px; transition: width 0.5s ease; max-width: 100%; }
.dash-all-time { font-size: 0.78rem; color: var(--text-secondary); text-align: right; white-space: nowrap; }

/* ============================================================ Timeline */
.timeline-section {
  background: var(--bg-card); border-radius: var(--border-radius);
  overflow: hidden; box-shadow: var(--shadow-sm); margin-bottom: 16px;
}
.timeline-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--border-color);
}
.timeline-title { font-size: 0.9rem; font-weight: 700; color: var(--text-primary); }
.clear-btn {
  font-size: 0.78rem; color: var(--color-danger); padding: 4px 10px;
  border-radius: 12px; border: 1px solid var(--color-danger);
  transition: all var(--transition);
}
.clear-btn:hover { background: var(--color-danger); color: #fff; }

.cal-grid { display: grid; grid-template-columns: 52px 1fr; overflow-y: auto; max-height: 70vh; }
.cal-labels {
  border-right: 1px solid var(--border-color);
  background: var(--bg-card); position: sticky; left: 0; z-index: 2;
  overflow: visible;
}
.cal-label-row {
  height: 120px; /* 1時間分（2px × 60分） */
  display: flex; align-items: flex-start;
  justify-content: flex-end; padding-right: 8px; flex-shrink: 0;
  pointer-events: none;
}
.cal-label-text {
  font-size: 0.72rem; color: var(--text-muted); font-variant-numeric: tabular-nums;
  transform: translateY(-0.5em); white-space: nowrap;
}
.cal-label-row.is-hour .cal-label-text { color: var(--text-secondary); font-weight: 600; }
.cal-events { position: relative; background: var(--bg-card); }
.cal-line { position: absolute; left: 0; right: 0; height: 1px; pointer-events: none; }
.cal-line.is-hour { background: var(--border-color); }
.cal-empty-area {
  position: absolute; left: 2px; right: 2px; cursor: pointer;
  border-radius: 4px; transition: background var(--transition); z-index: 1;
}
.cal-empty-area:hover { background: var(--color-primary-light); }
.cal-event-block {
  position: absolute; left: 4px; right: 4px; border-radius: 6px;
  padding: 3px 8px 3px 10px; cursor: pointer; overflow: hidden; z-index: 3;
  transition: filter var(--transition), transform var(--transition);
  border-left: 3px solid rgba(0,0,0,0.2);
}
.cal-event-block:hover { filter: brightness(1.08); transform: scaleX(1.01); z-index: 4; }

.cat-study         { background: rgba(59,130,246,0.88);  color: #fff; }
.cat-commute-study { background: rgba(14,165,233,0.88);  color: #fff; }
.cat-commute       { background: rgba(245,158,11,0.88);  color: #fff; }
.cat-sleep         { background: rgba(139,92,246,0.88);  color: #fff; }
.cat-exercise      { background: rgba(34,197,94,0.88);   color: #fff; }
.cat-class         { background: rgba(239,68,68,0.88);   color: #fff; }
.cat-free          { background: rgba(236,72,153,0.88);  color: #fff; }
.cat-other         { background: rgba(107,114,128,0.88); color: #fff; }

.cal-event-actions {
  position: absolute; top: 3px; right: 4px;
  display: flex; gap: 2px; opacity: 0; transition: opacity var(--transition);
}
.cal-event-block:hover .cal-event-actions { opacity: 1; }
@media (hover: none) { .cal-event-actions { opacity: 1; } }
.cal-event-btn {
  width: 22px; height: 22px; border-radius: 4px;
  background: rgba(0,0,0,0.25); color: #fff; font-size: 0.75rem;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition); line-height: 1;
}
.cal-event-btn:hover { background: rgba(0,0,0,0.45); }
.cal-event-title { display: block; font-size: 0.82rem; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding-right: 50px; }
.cal-event-time  { display: block; font-size: 0.72rem; opacity: 0.85; margin-top: 1px; }
.cal-event-memo  { display: block; font-size: 0.7rem; opacity: 0.75; margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.current-time-indicator {
  position: absolute; left: 0; right: 0; height: 2px;
  background: #ef4444; z-index: 10; pointer-events: none;
}
.current-time-indicator::before {
  content: ''; position: absolute; left: -4px; top: -4px;
  width: 10px; height: 10px; border-radius: 50%; background: #ef4444;
}

/* ============================================================ Legend */
.legend-section {
  background: var(--bg-card); border-radius: var(--border-radius);
  padding: 14px; box-shadow: var(--shadow-sm); margin-bottom: 16px;
}
.legend-title { font-size: 0.8rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.legend-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 6px; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 0.82rem; color: var(--text-secondary); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

/* ============================================================ Weekly Tab */
.weekly-summary-section { display: flex; flex-direction: column; gap: 12px; }
.weekly-nav {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  background: var(--bg-card); border-radius: var(--border-radius); padding: 12px; box-shadow: var(--shadow-sm);
}
.week-range-label { font-size: 0.9rem; font-weight: 700; color: var(--text-primary); flex: 1; text-align: center; }
.weekly-study-card {
  background: linear-gradient(135deg, #1d4ed8, #3b82f6);
  border-radius: var(--border-radius); padding: 18px 20px; color: #fff;
  box-shadow: 0 4px 16px rgba(59,130,246,0.3);
}
.weekly-study-card__title { font-size: 0.85rem; opacity: 0.85; margin-bottom: 6px; }
.weekly-study-card__value { font-size: 2rem; font-weight: 800; margin-bottom: 4px; }
.weekly-study-card__compare { font-size: 0.82rem; opacity: 0.8; }
.weekly-cats {
  background: var(--bg-card); border-radius: var(--border-radius); padding: 14px;
  box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 8px;
}
.weekly-cat-row { display: grid; grid-template-columns: 12px 100px 1fr 70px; align-items: center; gap: 8px; }
.weekly-cat-dot { width: 10px; height: 10px; border-radius: 50%; }
.weekly-cat-name { font-size: 0.82rem; color: var(--text-primary); }
.weekly-cat-bar-wrap { height: 8px; background: var(--bg-hover); border-radius: 4px; overflow: hidden; }
.weekly-cat-bar { height: 100%; border-radius: 4px; transition: width 0.5s ease; }
.weekly-cat-time { font-size: 0.78rem; color: var(--text-secondary); text-align: right; white-space: nowrap; }

.weekly-graph-section {
  background: var(--bg-card); border-radius: var(--border-radius); padding: 14px; box-shadow: var(--shadow-sm);
}
.weekly-graph-title { font-size: 0.85rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.graph-legend { display: flex; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.graph-legend-item { display: flex; align-items: center; gap: 4px; font-size: 0.78rem; color: var(--text-secondary); }
.graph-dot { width: 8px; height: 8px; border-radius: 50%; }
.weekly-graph-wrap { position: relative; width: 100%; overflow-x: auto; }
.weekly-chart { width: 100%; height: 200px; display: block; }

.weekly-detail-section {
  background: var(--bg-card); border-radius: var(--border-radius); padding: 14px; box-shadow: var(--shadow-sm);
}
.weekly-detail-title { font-size: 0.85rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.weekly-day-detail { display: flex; flex-direction: column; gap: 6px; }
.weekly-day-row {
  display: grid; grid-template-columns: 60px 1fr 80px; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: var(--border-radius-sm); background: var(--bg-hover);
  cursor: pointer; transition: background var(--transition);
}
.weekly-day-row:hover { background: var(--color-primary-light); }
.weekly-day-row.is-today { border: 2px solid var(--color-primary); }
.weekly-day-label { font-size: 0.82rem; font-weight: 600; color: var(--text-primary); }
.weekly-day-bar-wrap { height: 6px; background: var(--border-color); border-radius: 3px; overflow: hidden; }
.weekly-day-bar { height: 100%; background: var(--color-primary); border-radius: 3px; transition: width 0.5s ease; }
.weekly-day-time { font-size: 0.78rem; color: var(--text-secondary); text-align: right; }

/* ============================================================ Routine Tab */
.routine-section { display: flex; flex-direction: column; gap: 12px; }
.routine-header {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--bg-card); border-radius: var(--border-radius); padding: 14px 16px; box-shadow: var(--shadow-sm);
}
.routine-header-title { font-size: 1rem; font-weight: 700; color: var(--text-primary); }
.routine-desc {
  font-size: 0.82rem; color: var(--text-secondary);
  background: var(--bg-card); border-radius: var(--border-radius); padding: 10px 14px; box-shadow: var(--shadow-sm);
}
.routine-list { display: flex; flex-direction: column; gap: 10px; }
.routine-card {
  background: var(--bg-card); border-radius: var(--border-radius); padding: 14px 16px;
  box-shadow: var(--shadow-sm); border-left: 4px solid var(--color-primary);
}
.routine-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.routine-card-name { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); }
.routine-card-actions { display: flex; gap: 6px; }
.routine-task-preview { display: flex; flex-direction: column; gap: 3px; margin-bottom: 10px; }
.routine-task-item { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; color: var(--text-secondary); }
.routine-task-dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
.routine-apply-btn {
  width: 100%; padding: 8px; border-radius: var(--border-radius-sm);
  background: var(--color-primary); color: #fff; font-size: 0.85rem; font-weight: 600;
  transition: background var(--transition);
}
.routine-apply-btn:hover { background: var(--color-primary-dark); }
.routine-empty {
  background: var(--bg-card); border-radius: var(--border-radius); padding: 40px 20px;
  text-align: center; box-shadow: var(--shadow-sm);
}
.routine-empty-icon { font-size: 2.5rem; margin-bottom: 10px; }
.routine-empty-text { font-size: 1rem; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; }
.routine-empty-sub { font-size: 0.82rem; color: var(--text-secondary); }

.routine-tasks-editor { border: 1px solid var(--border-color); border-radius: var(--border-radius-sm); overflow: hidden; }
.routine-tasks-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 12px; background: var(--bg-hover); border-bottom: 1px solid var(--border-color);
}
.routine-task-list { max-height: 280px; overflow-y: auto; }
.routine-task-editor-row {
  display: grid; grid-template-columns: 1fr 80px 80px 30px;
  gap: 6px; padding: 8px 10px; border-bottom: 1px solid var(--border-color); align-items: center;
}
.routine-task-editor-row:last-child { border-bottom: none; }
.routine-task-editor-row select,
.routine-task-editor-row input {
  font-size: 0.8rem; padding: 4px 6px;
  border: 1px solid var(--border-color); border-radius: 6px;
  background: var(--bg-input); color: var(--text-primary);
}
.routine-task-remove-btn {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--bg-hover); color: var(--color-danger); font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.routine-task-remove-btn:hover { background: var(--color-danger); color: #fff; }

/* ============================================================ Modal */
.modal-overlay {
  position: fixed; inset: 0; z-index: 500;
  background: var(--bg-modal); display: flex;
  align-items: flex-end; justify-content: center; padding: 0;
  backdrop-filter: blur(2px);
}
.modal-overlay[hidden] { display: none; }
.modal-card {
  background: var(--bg-card); border-radius: 20px 20px 0 0;
  padding: 20px 20px 32px; width: 100%; max-width: 560px;
  max-height: 92vh; overflow-y: auto;
  animation: slideUp 0.25s ease;
}
.modal-card-sm { border-radius: 20px 20px 0 0; max-height: 60vh; }
@keyframes slideUp {
  from { transform: translateY(30px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.modal-title { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); }
.modal-close-btn {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--bg-hover); color: var(--text-secondary); font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center; transition: background var(--transition);
}
.modal-close-btn:hover { background: var(--border-color); }

.task-form { display: flex; flex-direction: column; gap: 14px; }
.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group-half { flex: 1; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-label { font-size: 0.82rem; font-weight: 600; color: var(--text-secondary); }
.required { color: var(--color-danger); }
.form-input, .form-select, .form-textarea {
  padding: 10px 12px; border: 1.5px solid var(--border-color);
  border-radius: var(--border-radius-sm); background: var(--bg-input);
  color: var(--text-primary); font-size: 0.95rem;
  transition: border-color var(--transition); width: 100%;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none; border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}
.form-input.is-error, .form-select.is-error { border-color: var(--color-danger); }
.form-textarea { resize: vertical; min-height: 60px; }
.form-error { font-size: 0.75rem; color: var(--color-danger); min-height: 1em; }
.form-actions { display: flex; gap: 10px; justify-content: flex-end; }

.btn {
  padding: 10px 20px; border-radius: var(--border-radius-sm);
  font-size: 0.9rem; font-weight: 600; transition: all var(--transition);
  display: inline-flex; align-items: center; justify-content: center; gap: 4px;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-secondary { background: var(--bg-hover); color: var(--text-secondary); }
.btn-secondary:hover { background: var(--border-color); }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { filter: brightness(0.9); }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }
.btn-icon {
  width: 30px; height: 30px; border-radius: 50%; font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-hover); color: var(--text-secondary);
  transition: all var(--transition);
}
.btn-icon:hover { background: var(--color-primary); color: #fff; }
.btn-icon.btn-danger-icon:hover { background: var(--color-danger); color: #fff; }

.delete-confirm-text { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.6; }

/* ============================================================ Toast */
.toast {
  position: fixed; bottom: 90px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1e293b; color: #fff; padding: 10px 20px;
  border-radius: 24px; font-size: 0.88rem; font-weight: 500;
  white-space: nowrap; opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 1000; box-shadow: var(--shadow-md);
}
.toast.toast-show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.toast-success { background: #16a34a; }
.toast.toast-error   { background: #dc2626; }

/* ============================================================ Responsive */
@media (min-width: 600px) {
  .modal-overlay { align-items: center; padding: 20px; }
  .modal-card { border-radius: var(--border-radius); max-height: 85vh; }
  .modal-card-sm { border-radius: var(--border-radius); }
  .cal-grid { max-height: 80vh; }
}
@media (min-width: 768px) {
  .app-main { padding: 16px 20px 80px; }
  .study-main-card { padding: 22px 24px; }
  .study-hours-big { font-size: 3.5rem; }
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ============================================================
   試験カウントダウンセクション
   ============================================================ */
.exam-countdown-section {
  background: linear-gradient(135deg, #1e3a5f 0%, #1e40af 100%);
  border-radius: var(--border-radius);
  padding: 14px 16px 10px;
  margin-bottom: 12px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.exam-countdown-section.is-unset {
  background: linear-gradient(135deg, #374151 0%, #4b5563 100%);
}
.exam-countdown-section.is-past {
  background: linear-gradient(135deg, #7f1d1d 0%, #991b1b 100%);
}
.exam-countdown-section.is-today {
  background: linear-gradient(135deg, #14532d 0%, #15803d 100%);
}
.exam-countdown-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.exam-countdown-left { flex: 1; min-width: 0; }
.exam-countdown-name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.exam-countdown-date {
  font-size: 0.78rem;
  opacity: 0.85;
  margin-bottom: 2px;
}
.exam-countdown-today {
  font-size: 0.72rem;
  opacity: 0.7;
}
.exam-countdown-right { flex-shrink: 0; }
.exam-countdown-days-wrap {
  display: flex;
  align-items: baseline;
  gap: 3px;
}
.exam-countdown-days {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -1px;
}
.exam-countdown-days-unit {
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0.85;
}
.exam-settings-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
  padding: 5px 12px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 20px;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}
.exam-settings-btn:hover {
  background: rgba(255,255,255,0.25);
}
[data-theme="dark"] .exam-countdown-section {
  background: linear-gradient(135deg, #1e3a5f 0%, #1d4ed8 100%);
}

/* ============================================================
   今日の目標問題数ウィジェット
   ============================================================ */
.today-problems-widget-wrap {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 12px 14px;
  margin-bottom: 12px;
}
.today-problems-widget-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.today-problems-widget { display: flex; flex-direction: column; gap: 6px; }
.today-prob-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: var(--bg-secondary);
  border-radius: 8px;
  font-size: 0.84rem;
}
.today-prob-name { flex: 1; font-weight: 600; color: var(--text-primary); }
.today-prob-remaining { color: var(--text-secondary); font-size: 0.78rem; }
.today-prob-daily {
  font-weight: 700;
  color: #3b82f6;
  font-size: 0.84rem;
  min-width: 60px;
  text-align: right;
}
.widget-empty {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
  padding: 8px 0;
  line-height: 1.6;
}

/* ============================================================
   問題集タブ
   ============================================================ */
.problems-section { padding: 0; }
.problems-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
  padding: 4px 0;
}
.problems-header-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}
.problems-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.5;
}
.problems-exam-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: #fef9c3;
  border: 1px solid #fde047;
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 12px;
  font-size: 0.8rem;
  color: #713f12;
  flex-wrap: wrap;
}
[data-theme="dark"] .problems-exam-banner {
  background: #422006;
  border-color: #92400e;
  color: #fde68a;
}
.problem-list { display: flex; flex-direction: column; gap: 12px; }

/* 問題集カード */
.problem-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 14px 16px;
  transition: box-shadow 0.2s;
}
.problem-card:hover { box-shadow: var(--shadow-md); }
.problem-card.is-complete {
  opacity: 0.7;
  border-color: #22c55e;
  background: linear-gradient(135deg, var(--card-bg) 0%, rgba(34,197,94,0.05) 100%);
}
.problem-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.problem-card-title {
  display: flex;
  align-items: center;
  gap: 8px;
}
.problem-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}
.problem-badge-done {
  display: inline-block;
  padding: 2px 8px;
  background: #22c55e;
  color: #fff;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 600;
}
.problem-card-actions {
  display: flex;
  gap: 4px;
}

/* 進捗バー */
.problem-progress-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.problem-progress-bar {
  flex: 1;
  height: 10px;
  background: var(--border-color);
  border-radius: 5px;
  overflow: hidden;
}
.problem-progress-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.4s ease;
}
.problem-pct {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
  min-width: 36px;
  text-align: right;
}

/* 統計行 */
.problem-stats {
  display: flex;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.problem-stat {
  display: flex;
  align-items: baseline;
  gap: 3px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}
.problem-stat strong { font-size: 1rem; color: var(--text-primary); }
.problem-stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-right: 2px;
}
.problem-remaining { color: #ef4444; }
.problem-stat-daily strong { color: #3b82f6; }

/* 更新ボタン行 */
.problem-update-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.prob-add-btn {
  padding: 6px 14px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.prob-add-btn:hover { background: #2563eb; }
.prob-add-btn:active { transform: scale(0.95); }
.prob-manual-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  min-width: 140px;
}
.prob-manual-input {
  flex: 1;
  padding: 6px 10px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.84rem;
  min-width: 0;
}
.prob-manual-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(59,130,246,0.2);
}
.prob-manual-btn {
  padding: 6px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s;
}
.prob-manual-btn:hover { background: var(--border-color); }

/* 問題集空状態 */
.problem-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}
.problem-empty-icon { font-size: 2.5rem; margin-bottom: 8px; }
.problem-empty-text { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.problem-empty-sub  { font-size: 0.82rem; }

/* ============================================================
   試験日設定モーダル（date input）
   ============================================================ */
input[type="date"].form-input {
  cursor: pointer;
}
input[type="date"].form-input::-webkit-calendar-picker-indicator {
  cursor: pointer;
  opacity: 0.6;
}
[data-theme="dark"] input[type="date"].form-input::-webkit-calendar-picker-indicator {
  filter: invert(1);
}

/* ============================================================
   問題集タブ内の試験日バナー（試験日設定済みの場合は非表示）
   ============================================================ */
.problems-exam-banner.is-hidden { display: none; }

/* ============================================================
   タブが4つになったため幅調整
   ============================================================ */
.tab-nav { gap: 2px; }
.tab-btn {
  padding: 8px 10px;
  font-size: 0.82rem;
}
@media (min-width: 400px) {
  .tab-btn { padding: 9px 14px; font-size: 0.88rem; }
}

/* ============================================================
   Responsive 追加
   ============================================================ */
@media (min-width: 600px) {
  .exam-countdown-section { padding: 16px 20px 12px; }
  .exam-countdown-days    { font-size: 3.5rem; }
  .problem-card           { padding: 16px 20px; }
  .prob-add-btn           { padding: 7px 18px; }
}

/* ============================================================
   勉強タイマー
   ============================================================ */
.study-timer-section {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 18px 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.timer-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 14px;
}
.timer-header__icon { font-size: 1.2rem; }
.timer-header__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  flex: 1;
  text-align: left;
}

/* ステータスバッジ */
.timer-status {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 20px;
  letter-spacing: 0.3px;
  transition: background var(--transition), color var(--transition);
}
.timer-status--idle    { background: var(--bg-hover); color: var(--text-secondary); }
.timer-status--running { background: #dcfce7; color: #15803d; }
.timer-status--paused  { background: #fef9c3; color: #a16207; }

[data-theme="dark"] .timer-status--running { background: #14532d; color: #86efac; }
[data-theme="dark"] .timer-status--paused  { background: #422006; color: #fde68a; }

/* 時間表示 */
.timer-display {
  font-size: 3.2rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: 2px;
  color: var(--text-primary);
  margin-bottom: 18px;
  line-height: 1;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace, -apple-system;
}

/* ボタン群 */
.timer-controls {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.timer-btn {
  flex: 1;
  max-width: 120px;
  padding: 10px 0;
  border-radius: var(--border-radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: background var(--transition), transform 0.1s ease, opacity var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.timer-btn:active { transform: scale(0.96); }
.timer-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}

.timer-btn--start  { background: #3b82f6; color: #fff; }
.timer-btn--start:hover:not(:disabled) { background: #2563eb; }
.timer-btn--resume { background: #22c55e; color: #fff; }
.timer-btn--resume:hover:not(:disabled) { background: #16a34a; }
.timer-btn--break  { background: #f59e0b; color: #fff; }
.timer-btn--break:hover:not(:disabled) { background: #d97706; }
.timer-btn--break.is-active { background: #d97706; }
.timer-btn--stop   { background: #ef4444; color: #fff; }
.timer-btn--stop:hover:not(:disabled) { background: #dc2626; }

/* タイマー記録モーダルの経過時間ラベル */
.timer-elapsed-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: var(--border-radius-sm);
  padding: 8px 14px;
  margin-bottom: 16px;
  text-align: center;
}

@media (max-width: 400px) {
  .timer-display { font-size: 2.6rem; }
  .timer-btn { font-size: 0.82rem; padding: 9px 0; }
}