/* ==========================================================
   AI+IT 資格マスターカレッジ ポータル - 学校ポータル風 v3.0
   配色: 白基調 + 濃紺(#1e3a8a) + 学術系Serif見出し
   ========================================================== */

:root {
  --bg-page: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-alt: #f8fafc;
  --bg-highlight: #eff6ff;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text-0: #0f172a;
  --text-1: #334155;
  --text-2: #64748b;
  --text-3: #94a3b8;
  --text-inv: #ffffff;

  --accent: #1e3a8a;
  --accent-2: #2563eb;
  --accent-3: #3b82f6;
  --success: #059669;
  --success-2: #10b981;
  --warning: #d97706;
  --danger: #dc2626;
  --info: #0284c7;
  --purple: #7c3aed;
  --pink: #ec4899;

  --font-serif: "Noto Serif JP", "游明朝", "Yu Mincho", "MS PMincho", "Times New Roman", serif;
  --font-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  --font-mono: "SFMono-Regular", "Consolas", "Menlo", monospace;

  --radius-sm: 4px;
  --radius: 6px;
  --radius-lg: 12px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.12);

  --header-h: 68px;
  --nav-h: 48px;
}

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

html, body {
  background: var(--bg-page);
  color: var(--text-0);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ==================== ヘッダー（大学名バナー） ==================== */
#app-header {
  position: sticky;
  top: 0;
  height: var(--header-h);
  background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 60%, #2563eb 100%);
  color: white;
  display: flex;
  align-items: center;
  padding: 0 28px;
  z-index: 100;
  box-shadow: var(--shadow);
  border-bottom: 3px solid #d97706;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
}
.brand-emblem {
  font-size: 32px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}
.brand-text { display: flex; flex-direction: column; gap: 2px; }
.brand-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.08em;
  line-height: 1.1;
}
.brand-tagline {
  font-size: 11px;
  opacity: 0.9;
  letter-spacing: 0.15em;
  font-weight: 400;
}

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}
.user-info {
  padding: 8px 14px;
  background: rgba(255,255,255,0.12);
  border-radius: 6px;
  font-size: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
  border: 1px solid rgba(255,255,255,0.15);
}
.user-avatar {
  width: 28px; height: 28px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}
.user-name-block { display: flex; flex-direction: column; line-height: 1.2; }
.user-name { font-weight: 600; font-size: 12px; }
.user-role { font-size: 10px; opacity: 0.85; }

.header-btn {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  color: white;
  padding: 7px 12px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-sans);
  transition: all 0.15s;
}
.header-btn:hover { background: rgba(255,255,255,0.28); }
.header-btn.danger:hover { background: rgba(220, 38, 38, 0.6); border-color: rgba(220, 38, 38, 0.8); }

/* ==================== トップナビ（横並びタブ） ==================== */
#app-nav {
  background: white;
  border-bottom: 2px solid var(--border);
  padding: 0 24px;
  position: sticky;
  top: var(--header-h);
  z-index: 90;
  display: flex;
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
  scrollbar-width: thin;
}
#app-nav::-webkit-scrollbar { height: 4px; }
#app-nav::-webkit-scrollbar-thumb { background: var(--border-strong); }

.nav-item {
  padding: 14px 20px;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--text-1);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: all 0.15s;
}
.nav-item:hover {
  color: var(--accent);
  background: var(--bg-highlight);
}
.nav-item.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 700;
  background: var(--bg-highlight);
}
.nav-icon { font-size: 16px; }

/* ==================== メイン ==================== */
#main {
  padding: 24px 32px 60px;
  max-width: 1400px;
  margin: 0 auto;
}

.view { display: none; }
.view.active {
  display: block;
  animation: fadeIn 0.25s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.view-header {
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.view-header h1 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 4px;
  letter-spacing: 0.05em;
}
.view-header .lede {
  color: var(--text-2);
  font-size: 13px;
}
.view-actions {
  display: flex;
  gap: 8px;
}

h2 {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-0);
  display: flex;
  align-items: center;
  gap: 8px;
}
h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 16px;
  background: var(--accent);
  border-radius: 2px;
}

h3 {
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 6px;
}

/* ==================== カード ==================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}
.card.card-highlight {
  border-left: 4px solid var(--accent);
}

/* ==================== 統計グリッド ==================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  border-top: 3px solid var(--accent);
  box-shadow: var(--shadow-sm);
  transition: all 0.15s;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.stat-card.stat-success { border-top-color: var(--success); }
.stat-card.stat-warning { border-top-color: var(--warning); }
.stat-card.stat-info { border-top-color: var(--info); }
.stat-card.stat-purple { border-top-color: var(--purple); }

.stat-label {
  font-size: 11px;
  color: var(--text-2);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  font-weight: 600;
}
.stat-value {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.stat-value .stat-total {
  font-size: 14px;
  color: var(--text-2);
  font-weight: 400;
  margin-left: 4px;
  font-family: var(--font-sans);
}
.stat-value.stat-month { font-size: 20px; color: var(--purple); }
.stat-sub { font-size: 11px; color: var(--text-2); margin-top: 6px; }

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  margin-top: 10px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--info) 100%);
  border-radius: 4px;
  transition: width 0.4s ease;
}

/* ==================== バッジ ==================== */
.badges { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.badge {
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 3px;
  font-weight: 700;
  letter-spacing: 0.03em;
  background: var(--bg-card-alt);
  color: var(--text-1);
  border: 1px solid var(--border);
}
.badge-p { background: rgba(30, 58, 138, 0.08); color: var(--accent); border-color: rgba(30, 58, 138, 0.2); }
.badge-g { background: rgba(124, 58, 237, 0.08); color: var(--purple); border-color: rgba(124, 58, 237, 0.2); }
.badge-o { background: rgba(2, 132, 199, 0.08); color: var(--info); border-color: rgba(2, 132, 199, 0.2); }
.badge-c { background: rgba(236, 72, 153, 0.08); color: var(--pink); border-color: rgba(236, 72, 153, 0.2); }
.badge-hard { background: rgba(220, 38, 38, 0.08); color: var(--danger); border-color: rgba(220, 38, 38, 0.2); }
.badge-mid { background: rgba(217, 119, 6, 0.08); color: var(--warning); border-color: rgba(217, 119, 6, 0.2); }
.badge-easy { background: rgba(5, 150, 105, 0.08); color: var(--success); border-color: rgba(5, 150, 105, 0.2); }
.badge-jp { background: var(--bg-card-alt); color: var(--text-2); }

/* ==================== ポリシーグリッド ==================== */
.policy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 10px;
}
.policy-item {
  background: var(--bg-card-alt);
  padding: 14px;
  border-radius: var(--radius);
  border-left: 3px solid var(--accent);
}
.policy-item h3 {
  font-size: 12px;
  color: var(--accent);
  margin-bottom: 6px;
  font-weight: 700;
  font-family: var(--font-sans);
}
.policy-item p { font-size: 12px; color: var(--text-1); line-height: 1.6; }

.next-actions { list-style: none; }
.next-actions li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 13px;
  color: var(--text-1);
}
.next-actions li:last-child { border-bottom: none; }
.next-actions li strong { color: var(--accent); }

/* ==================== お知らせ（学校ポータルらしさ） ==================== */
.announcements {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.announce-item {
  padding: 12px 14px;
  background: var(--bg-card-alt);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  gap: 12px;
  border-left: 3px solid var(--info);
  font-size: 13px;
}
.announce-item.urgent {
  border-left-color: var(--danger);
  background: rgba(220, 38, 38, 0.04);
}
.announce-item.warning {
  border-left-color: var(--warning);
  background: rgba(217, 119, 6, 0.04);
}
.announce-item.success {
  border-left-color: var(--success);
  background: rgba(5, 150, 105, 0.04);
}
.announce-tag {
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 3px;
  background: var(--info);
  color: white;
  font-weight: 700;
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.announce-item.urgent .announce-tag { background: var(--danger); }
.announce-item.warning .announce-tag { background: var(--warning); }
.announce-item.success .announce-tag { background: var(--success); }
.announce-body { flex: 1; color: var(--text-1); }
.announce-body strong { color: var(--text-0); }
.announce-date {
  color: var(--text-2);
  font-size: 11px;
  font-family: var(--font-mono);
  margin-left: auto;
}

/* ==================== 時間割（月別スケジュール） ==================== */
.month-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 14px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.month-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
}
.month-card.month-hard::before { background: var(--danger); }
.month-card.month-buffer::before { background: var(--success); }
.month-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}
.month-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-0);
}
.month-subtitle {
  font-size: 12px;
  color: var(--text-2);
  margin-top: 2px;
}
.month-stats {
  display: flex;
  gap: 8px;
  font-size: 11px;
  color: var(--text-2);
}
.month-stats span {
  padding: 3px 8px;
  background: var(--bg-card-alt);
  border-radius: 3px;
  border: 1px solid var(--border);
}
.month-goal {
  font-size: 13px;
  color: var(--text-1);
  padding: 10px 12px;
  background: var(--bg-highlight);
  border-radius: 4px;
  margin-bottom: 10px;
  border-left: 3px solid var(--accent);
}
.month-certs { display: flex; flex-direction: column; gap: 6px; }
.month-cert-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-card-alt);
  border-radius: 4px;
  font-size: 12px;
  border: 1px solid var(--border);
}
.month-cert-week {
  color: var(--accent);
  font-weight: 700;
  min-width: 50px;
  font-family: var(--font-mono);
}
.month-cert-name { flex: 1; color: var(--text-0); font-weight: 500; }
.month-cert-meta { color: var(--text-2); font-size: 11px; }

/* ==================== 週次カレンダー（新規） ==================== */
.week-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}
.week-nav-title {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--text-0);
  font-size: 15px;
}
.week-nav-btn {
  padding: 6px 14px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
}
.week-nav-btn:hover { background: var(--accent-2); }
.week-nav-btn.ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.week-nav-btn.ghost:hover { background: var(--bg-highlight); }

.calendar-grid {
  display: grid;
  grid-template-columns: 70px repeat(7, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.calendar-cell {
  background: var(--bg-card);
  padding: 6px;
  min-height: 90px;
  font-size: 11px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.calendar-cell.today {
  background: var(--bg-highlight);
  box-shadow: inset 0 0 0 2px var(--accent);
}
.calendar-cell.weekend { background: #fafafa; }
.calendar-cell.today.weekend { background: var(--bg-highlight); }
.calendar-header {
  background: var(--accent);
  color: white;
  font-weight: 700;
  text-align: center;
  padding: 8px 4px;
  font-size: 12px;
  font-family: var(--font-serif);
}
.calendar-header.weekend { background: var(--purple); }
.calendar-header.today { background: var(--warning); box-shadow: inset 0 0 0 2px white; }
.calendar-time {
  background: var(--bg-card-alt);
  color: var(--text-1);
  font-weight: 600;
  text-align: right;
  padding: 8px 6px;
  font-size: 11px;
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.calendar-event {
  background: rgba(30, 58, 138, 0.08);
  border-left: 3px solid var(--accent);
  padding: 4px 6px;
  border-radius: 3px;
  font-size: 10px;
  color: var(--accent);
  font-weight: 600;
  line-height: 1.3;
}
.calendar-event.exam {
  background: rgba(220, 38, 38, 0.08);
  border-left-color: var(--danger);
  color: var(--danger);
}
.calendar-event.review {
  background: rgba(5, 150, 105, 0.08);
  border-left-color: var(--success);
  color: var(--success);
}
.calendar-event.practice {
  background: rgba(217, 119, 6, 0.08);
  border-left-color: var(--warning);
  color: var(--warning);
}

.schedule-toggle {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
  padding: 4px;
  background: var(--bg-card-alt);
  border-radius: 6px;
  width: fit-content;
}
.schedule-toggle button {
  padding: 6px 14px;
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-1);
  font-family: var(--font-sans);
  font-weight: 500;
}
.schedule-toggle button.active {
  background: white;
  color: var(--accent);
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

/* ==================== 資格カード（シラバス） ==================== */
.filter-row {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.filter-btn {
  padding: 7px 14px;
  background: white;
  color: var(--text-1);
  border: 1px solid var(--border);
  border-radius: 5px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-sans);
  font-weight: 500;
  transition: all 0.15s;
}
.filter-btn:hover { color: var(--accent); border-color: var(--accent); }
.filter-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  font-weight: 700;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}
.cert-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: all 0.15s;
  position: relative;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.cert-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}
.cert-card.completed {
  opacity: 0.75;
  background: var(--bg-card-alt);
}
.cert-card.completed::after {
  content: '合格';
  position: absolute;
  top: 12px; right: 12px;
  background: var(--success);
  color: white;
  padding: 3px 10px;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-serif);
}
.cert-number {
  font-size: 10px;
  color: var(--text-2);
  margin-bottom: 4px;
  font-weight: 700;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}
.cert-name {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 10px;
  line-height: 1.4;
}
.cert-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 11px;
  color: var(--text-2);
}
.cert-meta-item { display: flex; align-items: center; gap: 4px; }
.cert-badges { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 12px; }
.cert-reason {
  font-size: 11px;
  color: var(--text-2);
  margin-bottom: 10px;
  padding-left: 8px;
  border-left: 2px solid var(--border);
}
.cert-check {
  width: 100%;
  padding: 8px;
  background: var(--bg-card-alt);
  color: var(--text-1);
  border: 1px solid var(--border);
  border-radius: 5px;
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font-sans);
  font-weight: 500;
  transition: all 0.15s;
}
.cert-check:hover { border-color: var(--accent); color: var(--accent); }
.cert-card.completed .cert-check {
  background: var(--success);
  color: white;
  border-color: var(--success);
}

/* ==================== 練習問題（小テスト） ==================== */
.cert-picker {
  background: white;
  padding: 14px 20px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
}
.cert-picker label {
  font-size: 13px;
  color: var(--text-1);
  font-weight: 600;
}
.cert-picker select {
  flex: 1;
  min-width: 240px;
  padding: 8px 12px;
  background: var(--bg-card-alt);
  color: var(--text-0);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 13px;
  cursor: pointer;
  font-family: var(--font-sans);
}

.practice-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.practice-summary .stat-card { padding: 14px; }

.question-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 14px;
  box-shadow: var(--shadow-sm);
}
.question-card.answered.correct { border-left: 4px solid var(--success); }
.question-card.answered.wrong { border-left: 4px solid var(--danger); }

.question-number {
  font-size: 11px;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}
.question-text {
  font-size: 14px;
  color: var(--text-0);
  margin-bottom: 16px;
  font-weight: 500;
  line-height: 1.7;
}
.choices { display: flex; flex-direction: column; gap: 8px; }
.choice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 13px;
  color: var(--text-1);
  text-align: left;
  width: 100%;
  font-family: var(--font-sans);
}
.choice:hover:not(:disabled) {
  background: var(--bg-highlight);
  border-color: var(--accent);
}
.choice-key {
  font-weight: 700;
  color: var(--accent);
  min-width: 20px;
  font-family: var(--font-serif);
}
.choice.correct {
  background: rgba(5, 150, 105, 0.06);
  border-color: var(--success);
  color: var(--text-0);
}
.choice.correct .choice-key { color: var(--success); }
.choice.wrong {
  background: rgba(220, 38, 38, 0.06);
  border-color: var(--danger);
  color: var(--text-0);
}
.choice.wrong .choice-key { color: var(--danger); }
.choice:disabled { cursor: default; }

.explanation {
  margin-top: 14px;
  padding: 12px 14px;
  background: var(--bg-highlight);
  border-radius: 5px;
  border-left: 3px solid var(--accent);
  font-size: 12px;
  color: var(--text-1);
  line-height: 1.7;
}
.explanation strong { color: var(--accent); }

.reset-question {
  margin-top: 10px;
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 3px;
  font-size: 11px;
  cursor: pointer;
  font-family: var(--font-sans);
}
.reset-question:hover { color: var(--accent); border-color: var(--accent); }

/* ==================== 図書室（勉強資料） ==================== */
.material-cert {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}
.material-cert-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 8px;
}
.material-cert-title {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-0);
}
.material-cert-meta {
  font-size: 11px;
  color: var(--text-2);
}
.material-list { display: flex; flex-direction: column; gap: 8px; }
.material-item {
  display: grid;
  grid-template-columns: 130px 1fr auto;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg-card-alt);
  border-radius: 5px;
  font-size: 12px;
  align-items: center;
  border: 1px solid var(--border);
}
.material-type {
  color: var(--purple);
  font-weight: 700;
  font-size: 11px;
}
.material-name { color: var(--text-1); }
.material-note {
  color: var(--text-2);
  font-size: 11px;
  text-align: right;
}
.material-free {
  background: rgba(5, 150, 105, 0.12);
  color: var(--success);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 10px;
  font-weight: 700;
  margin-right: 6px;
}
.material-paid {
  background: rgba(148, 163, 184, 0.15);
  color: var(--text-2);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 10px;
  font-weight: 700;
  margin-right: 6px;
}
.material-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dashed rgba(30, 58, 138, 0.35);
  transition: all 0.15s;
}
.material-link:hover {
  color: var(--accent-2);
  border-bottom-color: currentColor;
}

/* ==================== 余力延長 ==================== */
.extended-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 10px;
}
.extended-item {
  background: var(--bg-card-alt);
  padding: 12px;
  border-radius: 5px;
  border-left: 3px solid var(--purple);
}
.extended-name {
  font-size: 12px;
  color: var(--text-0);
  font-weight: 600;
  margin-bottom: 4px;
}
.extended-meta { font-size: 10px; color: var(--text-2); }
.extended-group {
  font-size: 12px;
  color: var(--purple);
  font-weight: 700;
  margin: 14px 0 8px;
  font-family: var(--font-serif);
  letter-spacing: 0.05em;
}

/* ==================== 講義（教材・章別解説） ==================== */
.course-header {
  background: linear-gradient(135deg, var(--bg-highlight) 0%, #dbeafe 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
  border-left: 4px solid var(--accent);
}
.course-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 6px;
}
.course-meta { font-size: 12px; color: var(--text-2); }

.course-chapter-nav {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 10px;
  margin-bottom: 20px;
}
.course-chapter-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  color: var(--text-1);
  cursor: pointer;
  text-align: left;
  transition: all 0.15s;
  box-shadow: var(--shadow-sm);
  font-family: var(--font-sans);
}
.course-chapter-btn:hover {
  background: var(--bg-highlight);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.course-chapter-btn.active {
  background: var(--bg-highlight);
  border-color: var(--accent);
  color: var(--text-0);
  box-shadow: 0 0 0 2px rgba(30, 58, 138, 0.1);
}
.course-chapter-num {
  font-family: var(--font-serif);
  font-size: 11px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.05em;
}
.course-chapter-title {
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
}

.course-intro-card { margin-top: 20px; }

.course-content {
  margin-top: 20px;
  scroll-margin-top: 20px;
}
.chapter-title-block {
  border-bottom: 2px solid var(--accent);
  padding-bottom: 14px;
  margin-bottom: 20px;
}
.chapter-num-badge {
  display: inline-block;
  background: rgba(30, 58, 138, 0.1);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  font-family: var(--font-serif);
}
.chapter-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-0);
  line-height: 1.4;
  letter-spacing: 0.03em;
}

.chapter-section { margin-bottom: 28px; }
.section-heading {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--border-strong);
}

.key-points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.key-points li {
  background: rgba(5, 150, 105, 0.06);
  border-left: 3px solid var(--success);
  padding: 10px 14px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--text-1);
  line-height: 1.7;
}

.chapter-body {
  color: var(--text-1);
  font-size: 14px;
  line-height: 1.9;
}
.chapter-body p { margin: 0 0 14px; }
.chapter-body p:last-child { margin-bottom: 0; }
.chapter-body strong { color: var(--accent); font-weight: 700; }
.chapter-body ul { padding-left: 24px; margin: 8px 0 14px; }
.chapter-body li { margin-bottom: 6px; }
.chapter-body em { font-style: italic; color: var(--text-2); }

.term-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 8px;
}
.term-item {
  background: var(--bg-card-alt);
  padding: 10px 12px;
  border-radius: 5px;
  border-left: 3px solid var(--accent);
}
.term-name {
  display: block;
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 2px;
}
.term-desc {
  display: block;
  font-size: 11px;
  color: var(--text-2);
  line-height: 1.5;
}

.ex-block {
  background: var(--bg-highlight);
  border-radius: 6px;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
}
.ex-q {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-0);
  margin-bottom: 12px;
  line-height: 1.7;
}
.ex-choices {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}
.ex-choice {
  background: white;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--text-1);
  border: 1px solid var(--border);
}
.ex-choice.ex-correct {
  background: rgba(5, 150, 105, 0.08);
  border-color: var(--success);
  color: var(--text-0);
  font-weight: 500;
}
.ex-choice-key { font-weight: 700; margin-right: 6px; color: var(--accent); }
.ex-choice.ex-correct .ex-choice-key { color: var(--success); }
.ex-answer {
  font-size: 13px;
  color: var(--success);
  margin-bottom: 8px;
  font-weight: 600;
}
.ex-answer strong { font-size: 16px; font-family: var(--font-serif); }
.ex-expl {
  font-size: 12px;
  color: var(--text-2);
  line-height: 1.7;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}

.chapter-summary {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.chapter-summary li {
  background: rgba(30, 58, 138, 0.06);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--text-1);
  line-height: 1.6;
}

.chapter-pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.pager-btn {
  background: white;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 10px 16px;
  color: var(--text-1);
  cursor: pointer;
  font-size: 13px;
  font-family: var(--font-sans);
  font-weight: 500;
  transition: all 0.15s;
}
.pager-btn:hover {
  background: var(--bg-highlight);
  border-color: var(--accent);
  color: var(--accent);
}

.course-summary-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}
.course-summary-item {
  background: var(--bg-card-alt);
  padding: 12px 14px;
  border-radius: 5px;
  border-left: 3px solid var(--accent);
  cursor: pointer;
  transition: background 0.15s;
}
.course-summary-item:hover { background: var(--bg-highlight); }
.course-summary-title {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 4px;
}
.course-summary-meta { font-size: 11px; color: var(--text-2); line-height: 1.5; }

/* ==================== 詳細教材へのリンク ==================== */
.deep-material-notice {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border: 1px solid #f59e0b;
  border-radius: var(--radius);
  padding: 14px 18px;
  margin: 16px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: #78350f;
}
.deep-material-notice::before {
  content: '📚';
  font-size: 20px;
}
.deep-material-link {
  color: #92400e;
  font-weight: 700;
  text-decoration: underline;
}

/* ==================== 成績（学習ログ・統計） ==================== */
.log-form {
  background: white;
  border: 1px solid var(--border);
  padding: 18px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  display: grid;
  grid-template-columns: 130px 1fr 100px 1fr auto;
  gap: 12px;
  align-items: end;
  box-shadow: var(--shadow-sm);
}
.log-form-field { display: flex; flex-direction: column; }
.log-form label {
  display: block;
  font-size: 11px;
  color: var(--text-2);
  margin-bottom: 4px;
  font-weight: 700;
}
.log-form input, .log-form select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 13px;
  width: 100%;
  font-family: var(--font-sans);
  background: white;
}
.log-form input:focus, .log-form select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: var(--accent);
}
.log-form button {
  padding: 9px 20px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
  font-family: var(--font-sans);
}
.log-form button:hover { background: var(--accent-2); }

.log-history {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.log-history-header {
  padding: 12px 16px;
  background: var(--bg-card-alt);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--text-0);
}
.log-item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 110px 1fr 70px 130px auto;
  gap: 12px;
  align-items: center;
  font-size: 12px;
}
.log-item:last-child { border-bottom: none; }
.log-item:hover { background: var(--bg-card-alt); }
.log-date {
  color: var(--text-2);
  font-family: var(--font-mono);
  font-size: 11px;
}
.log-cert {
  color: var(--text-0);
  font-weight: 600;
}
.log-hours {
  color: var(--accent);
  font-weight: 700;
  text-align: center;
  font-family: var(--font-serif);
  font-size: 14px;
}
.log-topic {
  color: var(--text-1);
  font-size: 11px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.log-del {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-2);
  padding: 4px 8px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 11px;
  font-family: var(--font-sans);
}
.log-del:hover { color: var(--danger); border-color: var(--danger); }
.log-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-2);
  font-size: 13px;
}

.weekly-chart-wrap {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}
.weekly-chart {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  height: 160px;
  align-items: end;
  padding: 20px 0 30px;
}
.weekly-bar-wrap {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
}
.weekly-bar-fill {
  width: 80%;
  background: linear-gradient(180deg, var(--accent) 0%, var(--info) 100%);
  border-radius: 4px 4px 0 0;
  transition: height 0.4s ease;
  min-height: 4px;
  position: relative;
}
.weekly-bar-fill.today { background: linear-gradient(180deg, var(--warning) 0%, #fbbf24 100%); }
.weekly-bar-label {
  position: absolute;
  bottom: -22px;
  left: 0; right: 0;
  text-align: center;
  font-size: 11px;
  color: var(--text-2);
  font-family: var(--font-mono);
}
.weekly-bar-value {
  position: absolute;
  top: -22px;
  left: 0; right: 0;
  text-align: center;
  font-size: 11px;
  color: var(--accent);
  font-weight: 700;
  font-family: var(--font-serif);
}

.grade-report {
  background: white;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.grade-report-header {
  text-align: center;
  padding-bottom: 16px;
  border-bottom: 2px double var(--accent);
  margin-bottom: 16px;
}
.grade-report-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
}
.grade-report-subtitle {
  font-size: 12px;
  color: var(--text-2);
  margin-top: 4px;
}
.grade-report-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.grade-block {
  padding: 12px;
  background: var(--bg-card-alt);
  border-radius: 5px;
}
.grade-block-label {
  font-size: 11px;
  color: var(--text-2);
  margin-bottom: 4px;
  font-weight: 700;
}
.grade-block-value {
  font-family: var(--font-serif);
  font-size: 24px;
  color: var(--accent);
  font-weight: 700;
}
.grade-block-sub { font-size: 11px; color: var(--text-2); margin-top: 4px; }

/* ==================== 時計台（ポモドーロタイマー） ==================== */
.pomodoro-container {
  max-width: 560px;
  margin: 0 auto;
}
.pomodoro-clock {
  background: white;
  border: 2px solid var(--accent);
  border-radius: 12px;
  padding: 36px 32px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.pomodoro-clock::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 8px;
  background: linear-gradient(90deg, var(--accent), var(--info), var(--success));
}
.pomodoro-mode {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--accent);
  letter-spacing: 0.3em;
  font-weight: 700;
  margin-bottom: 20px;
  text-transform: uppercase;
}
.pomodoro-mode.break { color: var(--success); }
.pomodoro-mode.longbreak { color: var(--purple); }

.pomodoro-time {
  font-family: var(--font-serif);
  font-size: 96px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  transition: color 0.3s;
}
.pomodoro-mode.break + .pomodoro-time { color: var(--success); }
.pomodoro-mode.longbreak + .pomodoro-time { color: var(--purple); }

.pomodoro-progress-ring {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 24px;
}
.pomodoro-progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 1s linear;
}

.pomodoro-controls {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.pomodoro-btn {
  padding: 12px 28px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
  transition: all 0.15s;
  min-width: 100px;
}
.pomodoro-btn.primary {
  background: var(--accent);
  color: white;
}
.pomodoro-btn.primary:hover { background: var(--accent-2); }
.pomodoro-btn.warning {
  background: var(--warning);
  color: white;
}
.pomodoro-btn.warning:hover { background: #b45309; }
.pomodoro-btn.secondary {
  background: white;
  color: var(--text-1);
  border: 1px solid var(--border);
}
.pomodoro-btn.secondary:hover {
  background: var(--bg-highlight);
  border-color: var(--accent);
  color: var(--accent);
}
.pomodoro-btn.danger {
  background: white;
  color: var(--danger);
  border: 1px solid var(--danger);
}
.pomodoro-btn.danger:hover { background: var(--danger); color: white; }

.pomodoro-cert-select {
  background: var(--bg-card-alt);
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 16px;
  border: 1px solid var(--border);
}
.pomodoro-cert-select label {
  display: block;
  font-size: 11px;
  color: var(--text-2);
  margin-bottom: 6px;
  font-weight: 700;
}
.pomodoro-cert-select select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 13px;
  background: white;
  font-family: var(--font-sans);
}

.pomodoro-stats {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
}
.pomodoro-stat {
  text-align: center;
  padding: 10px;
  border-right: 1px solid var(--border);
}
.pomodoro-stat:last-child { border-right: none; }
.pomodoro-stat-label {
  font-size: 10px;
  color: var(--text-2);
  margin-bottom: 6px;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.pomodoro-stat-value {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
}
.pomodoro-stat-value.success { color: var(--success); }
.pomodoro-stat-value.warning { color: var(--warning); }

.pomodoro-settings {
  background: var(--bg-card-alt);
  padding: 16px;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.pomodoro-settings h3 {
  font-family: var(--font-serif);
  margin-bottom: 12px;
  color: var(--accent);
}
.pomodoro-settings-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.pomodoro-setting {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.pomodoro-setting label {
  font-size: 11px;
  color: var(--text-2);
  font-weight: 600;
}
.pomodoro-setting input {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: var(--font-mono);
  text-align: center;
  font-size: 13px;
  background: white;
}

/* ==================== モーダル ==================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-overlay.open { display: flex; }
.modal {
  background: white;
  border-radius: 8px;
  padding: 24px;
  max-width: 400px;
  width: 90%;
  box-shadow: var(--shadow-lg);
  border-top: 4px solid var(--accent);
}
.modal h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--text-0);
}
.modal p { color: var(--text-1); margin-bottom: 20px; font-size: 13px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }

/* ==================== 印刷（PDFエクスポート用） ==================== */
@media print {
  #app-header, #app-nav, .header-btn, .cert-check,
  .pomodoro-controls, .log-form, .log-del, .filter-row,
  .view-actions, .schedule-toggle, .week-nav,
  #hamburger, .reset-question, .pomodoro-btn { display: none !important; }
  #main { padding: 0; max-width: 100%; margin: 0; }
  body { background: white; color: black; font-size: 12px; }
  .card, .cert-card, .stat-card, .question-card, .month-card, .material-cert {
    border: 1px solid #ccc;
    box-shadow: none;
    page-break-inside: avoid;
  }
  .view { display: block !important; page-break-after: always; }
  .view:last-child { page-break-after: auto; }
  .view h1 { font-size: 20px; page-break-after: avoid; }
  h2 { page-break-after: avoid; }
  .cert-grid, .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .calendar-grid { break-inside: avoid; }
  a { color: black; text-decoration: none; }
}

/* ==================== スクロールバー ==================== */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-page); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ==================== モバイル対応 ==================== */
@media (max-width: 900px) {
  #app-header { padding: 0 14px; height: 60px; }
  .brand-name { font-size: 16px; }
  .brand-tagline { display: none; }
  .brand-emblem { font-size: 24px; }
  .user-info { padding: 6px 10px; font-size: 11px; }
  .user-avatar { width: 24px; height: 24px; font-size: 13px; }
  .user-name-block { display: none; }
  .header-btn { padding: 5px 10px; font-size: 11px; }

  #app-nav { padding: 0; }
  .nav-item { padding: 12px 12px; font-size: 12px; gap: 6px; }
  .nav-icon { font-size: 14px; }

  #main { padding: 16px 12px 40px; }
  .view-header { flex-direction: column; align-items: flex-start; }
  .view-header h1 { font-size: 20px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-value { font-size: 22px; }
  .cert-grid { grid-template-columns: 1fr; }
  .policy-grid { grid-template-columns: 1fr; }

  .calendar-grid {
    grid-template-columns: 50px repeat(7, 1fr);
    font-size: 10px;
  }
  .calendar-cell { padding: 4px; min-height: 60px; font-size: 10px; }
  .calendar-header { padding: 6px 2px; font-size: 10px; }
  .calendar-time { padding: 4px; font-size: 10px; }
  .calendar-event { padding: 3px 4px; font-size: 9px; }

  .log-form {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .log-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .log-item > * { justify-self: start; text-align: left !important; }

  .pomodoro-time { font-size: 64px; }
  .pomodoro-clock { padding: 24px 20px; }
  .pomodoro-stats { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .pomodoro-stat { border-right: none; padding: 8px; }
  .pomodoro-settings-grid { grid-template-columns: 1fr; }

  .material-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .material-note { text-align: left; }

  .grade-report-body { grid-template-columns: 1fr; }
  .chapter-title { font-size: 18px; }
}

@media (max-width: 600px) {
  .stats-grid { grid-template-columns: 1fr; }
  .brand-emblem { font-size: 20px; }
  .brand-name { font-size: 14px; }
  .filter-btn { padding: 6px 10px; font-size: 11px; }
}