/* ==========================================================================
   Similarmetal Quiz Kit - Study Theme
   - 集中色 (teal): 学習・フォーカス
   - エネルギー色 (orange): ストリーク・達成感
   - 成長色 (green): 正解・習熟度
   - シンプルでコントラスト高めの配色で、長時間学習でも疲れにくい
   ========================================================================== */

:root {
  /* Backgrounds */
  --bg: #fbfcfd;
  --bg-deep: #f1f5f9;
  --bg-card: #ffffff;
  --bg-soft: #f8fafc;
  --bg-highlight: #f0fdfa;

  /* Text */
  --text: #0f172a;
  --text-soft: #334155;
  --text-muted: #64748b;
  --text-faint: #94a3b8;

  /* Borders */
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --line-soft: #eef2f7;

  /* Primary accent - 集中ティール (focus / study) */
  --accent: #0d9488;
  --accent-bright: #14b8a6;
  --accent-deep: #0f766e;
  --accent-soft: #ccfbf1;
  --accent-faint: #f0fdfa;

  /* Energy - やる気のオレンジ (streak / CTA) */
  --energy: #f97316;
  --energy-bright: #fb923c;
  --energy-deep: #ea580c;
  --energy-soft: #fed7aa;
  --energy-faint: #fff7ed;

  /* Success / Mastery */
  --green: #10b981;
  --green-bright: #34d399;
  --green-deep: #059669;
  --green-soft: #d1fae5;
  --green-faint: #ecfdf5;

  /* Review needed (warning) */
  --yellow: #f59e0b;
  --yellow-soft: #fef3c7;
  --yellow-faint: #fffbeb;

  /* Incorrect */
  --red: #ef4444;
  --red-soft: #fecaca;
  --red-faint: #fef2f2;

  /* Highlight */
  --highlight: var(--accent-faint);

  /* Compatibility (旧変数名のエイリアス) */
  --blue: var(--accent);
  --blue-soft: var(--accent-soft);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06), 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 28px rgba(13, 148, 136, 0.10), 0 4px 8px rgba(15, 23, 42, 0.04);
  --shadow-energy: 0 8px 20px rgba(249, 115, 22, 0.12), 0 2px 6px rgba(249, 115, 22, 0.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Zen Kaku Gothic Antique', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* ==========================================================================
   Top Nav
   ========================================================================== */
.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 252, 253, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.topnav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.topnav-brand {
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--accent);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.topnav-brand::before {
  content: '◆';
  font-size: 12px;
  color: var(--energy);
}
.topnav-links { display: flex; gap: 4px; flex: 1; }
.topnav a.nav-link {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 6px;
  transition: all 0.15s;
}
.topnav a.nav-link:hover {
  color: var(--text);
  background: var(--bg-soft);
}
.topnav a.nav-link.active {
  color: var(--accent);
  background: var(--accent-faint);
}

/* ==========================================================================
   Container & Typography
   ========================================================================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}
.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

.eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

h1.page-title {
  font-weight: 800;
  font-size: 48px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 16px;
}
h1.page-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-bright) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
}

.page-subtitle {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text-soft);
  margin-bottom: 24px;
}

.container > section > p {
  color: var(--text-soft);
  line-height: 1.85;
}

h2 {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 56px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
h2::before {
  content: '';
  width: 18px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
h2 + .h2-sub {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 28px;
  letter-spacing: -0.01em;
}

h3 {
  font-weight: 700;
  font-size: 18px;
  line-height: 1.5;
  color: var(--text);
  margin: 24px 0 10px;
}

p { color: var(--text-soft); }
code {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.9em;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent-deep);
}

/* ==========================================================================
   Cards & Grids
   ========================================================================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}
.card.hoverable:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.card-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
@media (max-width: 900px) { .card-grid-3, .card-grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) {
  .card-grid-2, .card-grid-3, .card-grid-4 { grid-template-columns: 1fr; }
  h1.page-title { font-size: 34px; }
  .page-subtitle { font-size: 17px; }
}

/* ==========================================================================
   Metric Cards (Today Stats)
   ========================================================================== */
.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 24px;
  position: relative;
  overflow: hidden;
  transition: all 0.2s;
}
.metric-card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.2s;
}
.metric-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}
.metric-card:hover::before { opacity: 1; }

#today-stats .metric-card:nth-child(1)::before { background: var(--accent); }
#today-stats .metric-card:nth-child(1) .metric-value { color: var(--accent); }
#today-stats .metric-card:nth-child(2)::before { background: var(--energy); }
#today-stats .metric-card:nth-child(2) .metric-value { color: var(--energy); }
#today-stats .metric-card:nth-child(2) .metric-label::after { content: ' 🔥'; }
#today-stats .metric-card:nth-child(3)::before { background: var(--green); }
#today-stats .metric-card:nth-child(3) .metric-value { color: var(--green); }

.metric-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.metric-value {
  font-weight: 800;
  font-size: 38px;
  line-height: 1.1;
  color: var(--accent);
  margin-bottom: 4px;
  letter-spacing: -0.02em;
  font-feature-settings: "tnum";
}
.metric-value .unit {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 600;
  margin-left: 4px;
}
.metric-desc {
  font-size: 12px;
  color: var(--text-muted);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  padding: 11px 22px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: white;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: var(--shadow-sm);
}
.btn:hover {
  background: var(--accent-deep);
  border-color: var(--accent-deep);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn:active { transform: translateY(0); }
.btn.secondary {
  background: transparent;
  color: var(--accent);
  border-color: var(--line-strong);
}
.btn.secondary:hover {
  background: var(--accent-faint);
  border-color: var(--accent);
  color: var(--accent-deep);
}
.btn.energy {
  background: var(--energy);
  border-color: var(--energy);
}
.btn.energy:hover {
  background: var(--energy-deep);
  border-color: var(--energy-deep);
}
.btn.ghost {
  background: transparent;
  color: var(--text-soft);
  border-color: var(--line);
  box-shadow: none;
}
.btn.ghost:hover {
  background: var(--bg-soft);
  color: var(--text);
}
.btn.large { padding: 14px 28px; font-size: 15px; }

/* ==========================================================================
   Callout
   ========================================================================== */
.callout {
  padding: 18px 22px;
  border-radius: 10px;
  margin: 18px 0;
  border-left: 3px solid var(--accent);
  background: var(--accent-faint);
}
.callout-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 6px;
  color: var(--accent-deep);
}

/* ==========================================================================
   Categories
   ========================================================================== */
.category-section {
  margin-bottom: 44px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--line-soft);
}
.category-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
}
.category-header {
  margin-bottom: 20px;
}
.category-title {
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 0 0 6px 0;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.category-title::before {
  content: '';
  width: 4px;
  height: 22px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-bright) 100%);
  border-radius: 2px;
}
.category-count {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 600;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 3px 8px;
  border-radius: 999px;
}
.category-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 760px;
  margin: 0 0 0 16px;
}
.category-exams {
  margin-top: 18px;
}

/* ==========================================================================
   Exam Cards
   ========================================================================== */
.exam-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 22px 18px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}
.exam-card::after {
  content: '→';
  position: absolute;
  right: 18px;
  top: 18px;
  font-size: 18px;
  color: var(--text-faint);
  transition: all 0.2s;
}
.exam-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.exam-card:hover::after {
  color: var(--accent);
  transform: translateX(4px);
}
.exam-card-code {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 8px;
}
.exam-card-name {
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 14px;
  line-height: 1.5;
  color: var(--text);
  padding-right: 24px;
}
.exam-card-meta {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-weight: 500;
}
.exam-card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.exam-card-meta span:nth-child(2) { color: var(--energy); }
.exam-card-meta span:nth-child(3) { color: var(--green); }

/* 誤答のみ復習リンク (exam-card の真下にバッジ風に表示) */
.exam-card-wrap { display: flex; flex-direction: column; gap: 6px; }
.exam-card-wrong {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-align: center;
  padding: 8px 12px;
  border: 1px dashed var(--red, #d4624a);
  border-radius: 6px;
  color: var(--red, #d4624a);
  text-decoration: none;
  background: transparent;
  transition: background 0.15s ease, color 0.15s ease;
  letter-spacing: 0.04em;
}
.exam-card-wrong:hover {
  background: var(--red, #d4624a);
  color: #fff;
}

/* ==========================================================================
   Quiz Page
   ========================================================================== */
.quiz-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 36px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}
.quiz-meta {
  display: flex;
  justify-content: space-between;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 8px;
}
.quiz-stem {
  font-size: 18px;
  line-height: 1.85;
  margin-bottom: 28px;
  font-weight: 600;
  color: var(--text);
}
.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 22px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  background: var(--bg-card);
  cursor: pointer;
  transition: all 0.15s ease;
  font-size: 15px;
  line-height: 1.7;
}
.quiz-option:hover {
  border-color: var(--accent);
  background: var(--accent-faint);
  transform: translateX(2px);
}
.quiz-option.selected {
  border-color: var(--accent);
  background: var(--accent-faint);
}
.quiz-option.correct {
  border-color: var(--green);
  background: var(--green-faint);
}
.quiz-option.incorrect {
  border-color: var(--red);
  background: var(--red-faint);
}
.quiz-option-id {
  font-weight: 800;
  font-size: 18px;
  color: var(--accent);
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--accent-faint);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent-soft);
}
.quiz-option.correct .quiz-option-id {
  color: var(--green-deep);
  background: var(--green-soft);
  border-color: var(--green);
}
.quiz-option.incorrect .quiz-option-id {
  color: var(--red);
  background: var(--red-soft);
  border-color: var(--red);
}
/* 正解だが未選択（見落とし）。緑一色で「合っていた」と誤読されないよう破線＋警告色で強調 */
.quiz-option.correct.missed {
  border-style: dashed;
  border-color: var(--yellow, #c08a00);
  background: var(--yellow-faint, rgba(255, 196, 0, 0.10));
}
.quiz-option.correct.missed .quiz-option-id {
  color: var(--yellow, #c08a00);
  background: var(--yellow-faint, rgba(255, 196, 0, 0.14));
  border-color: var(--yellow, #c08a00);
}

/* 各選択肢に「あなたの選択／正解（未選択）」を明示するタグ */
.quiz-option-tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.quiz-option-tag.tag-correct   { color: var(--green); background: var(--green-faint); }
.quiz-option-tag.tag-incorrect { color: var(--red);   background: var(--red-faint); }
.quiz-option-tag.tag-missed    { color: var(--yellow, #c08a00); background: var(--yellow-faint, rgba(255, 196, 0, 0.16)); }

/* 合否バナー（見落とせない大きさで明示） */
.quiz-verdict {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin: 0 0 16px;
  padding: 14px 18px;
  border-radius: 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.quiz-verdict.ok { color: var(--green); background: var(--green-faint); border: 1.5px solid var(--green); }
.quiz-verdict.ng { color: var(--red);   background: var(--red-faint);   border: 1.5px solid var(--red); }
.quiz-verdict-sub {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.01em;
}

.quiz-option-text { flex: 1; color: var(--text); }
.quiz-option-explain {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  display: none;
}
.quiz-option.show-explain .quiz-option-explain { display: block; }

.quiz-explanation {
  margin-top: 28px;
  padding: 24px;
  background: var(--bg-soft);
  border-radius: 12px;
  border-left: 3px solid var(--accent);
  display: none;
}
.quiz-explanation.show { display: block; }
.quiz-explanation h4 {
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.quiz-explanation p {
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.8;
}
.quiz-explanation a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--accent-soft);
}
.quiz-explanation a:hover {
  color: var(--accent-deep);
  border-bottom-color: var(--accent);
}

.quiz-multi-hint {
  margin: 4px 0 16px;
  padding: 10px 14px;
  border-left: 3px solid var(--accent);
  background: var(--accent-faint);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-deep, var(--accent));
}

.quiz-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.quiz-submit-btn {
  font-family: inherit;
}
.quiz-submit-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}
.quiz-submit-btn:disabled:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: none;
}

/* Quality rating buttons (study-friendly: clear color coding) */
.quality-rating {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 14px;
}
@media (max-width: 600px) {
  .quality-rating { grid-template-columns: repeat(2, 1fr); }
}
.quality-btn {
  padding: 12px 8px;
  text-align: center;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  background: var(--bg-card);
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-soft);
  transition: all 0.15s;
}
.quality-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.quality-btn.q-0 { border-color: var(--red); color: var(--red); }
.quality-btn.q-0:hover { background: var(--red-faint); }
.quality-btn.q-1 { border-color: var(--yellow); color: var(--yellow); }
.quality-btn.q-1:hover { background: var(--yellow-faint); }
.quality-btn.q-2 { border-color: var(--accent); color: var(--accent); }
.quality-btn.q-2:hover { background: var(--accent-faint); }
.quality-btn.q-3 { border-color: var(--green); color: var(--green); }
.quality-btn.q-3:hover { background: var(--green-faint); }

/* ==========================================================================
   Progress Bar
   ========================================================================== */
.progress-bar {
  height: 6px;
  background: var(--line-soft);
  border-radius: 999px;
  overflow: hidden;
  margin: 16px 0;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-bright) 100%);
  transition: width 0.4s ease;
  border-radius: 999px;
}

/* ==========================================================================
   Tables
   ========================================================================== */
table.data {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  font-size: 14px;
  box-shadow: var(--shadow-sm);
}
table.data th {
  background: var(--bg-soft);
  color: var(--text);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
table.data td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--text-soft);
  vertical-align: top;
}
table.data tr:last-child td { border-bottom: none; }
table.data tr:hover td { background: var(--bg-soft); }

/* ==========================================================================
   Loading Spinner
   ========================================================================== */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 16px;
  color: var(--text-muted);
  min-height: 240px;
}
.loading-spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--accent-soft);
  border-top-color: var(--accent);
  border-right-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-bottom: 18px;
  will-change: transform;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.loading-text {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-soft);
}

@media (prefers-reduced-motion: reduce) {
  .loading-spinner { animation-duration: 1.6s; }
}

/* ==========================================================================
   Empty State
   ========================================================================== */
.empty-state {
  text-align: center;
  padding: 60px 24px;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px dashed var(--line-strong);
  border-radius: 16px;
}
.empty-state-icon {
  font-size: 48px;
  color: var(--accent);
  margin-bottom: 16px;
  display: inline-block;
  width: 80px;
  height: 80px;
  line-height: 80px;
  background: var(--accent-faint);
  border-radius: 50%;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  margin-top: 80px;
  padding: 32px 24px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  font-weight: 500;
}