:root {
  --bg: #111110;
  --bg2: #1c1c1a;
  --bg3: #161614;
  --border: #222;
  --border2: #333;
  --text: #e8e8e4;
  --text-muted: #ccc;
  --text-dim: #999;
  --text-faint: #888;
  --label-faint: #666;
  --label-dim: #555;
  --label-faint2: #444;
  --accent: #4da6ff;
  --good: #5ecb7a;
  --warn: #f5b942;
  --bad: #f07070;
  --purple: #b39dff;
}

html.light-mode {
  --bg: #fafaf8;
  --bg2: #f0f0ee;
  --bg3: #e8e8e6;
  --border: #d8d8d6;
  --border2: #c0c0be;
  --text: #1a1a18;
  --text-muted: #333;
  --text-dim: #555;
  --text-faint: #777;
  --label-faint: #888;
  --label-dim: #999;
  --label-faint2: #aaa;
  --accent: #0066cc;
  --good: #0d8659;
  --warn: #a67c00;
  --bad: #cc3333;
  --purple: #6b4fb0;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: 2rem 1.5rem 5rem;
  transition:
    background 0.3s,
    color 0.3s;
}
a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* header */
.page-header {
  max-width: 860px;
  margin: 0 auto 2rem;
}
.page-header h1 {
  font-size: 24px;
  font-weight: 500;
  margin-bottom: 4px;
}
.page-header p {
  font-size: 13px;
  color: var(--label-faint);
}

/* stats */
.stats {
  display: flex;
  gap: 10px;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}
.stat {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem 1rem;
}
.stat-label {
  font-size: 10px;
  color: var(--label-dim);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 2px;
}
.stat-value {
  font-size: 22px;
  font-weight: 500;
  color: var(--text);
}
.stat-sub {
  font-size: 11px;
  color: var(--label-dim);
  margin-top: 1px;
}

/* progress */
.prog {
  max-width: 860px;
  margin: 0 auto 1.5rem;
  height: 3px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}
.prog-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 99px;
}

/* filters */
.filters {
  max-width: 860px;
  margin: 0 auto 0.75rem;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.filter-btn {
  font-size: 12px;
  padding: 5px 14px;
  border-radius: 99px;
  border: 1px solid var(--border2);
  background: transparent;
  color: var(--text-faint);
  cursor: pointer;
  transition: all 0.15s;
}
.filter-btn:hover {
  background: var(--bg2);
  color: var(--text-muted);
}
.filter-btn.active {
  background: rgba(0, 102, 204, 0.1);
  color: var(--accent);
  border-color: transparent;
}
button[onclick*="pratica"].active {
  background: rgba(13, 134, 89, 0.1);
  color: var(--good);
}
button[onclick*="projeto"].active {
  background: rgba(166, 124, 0, 0.1);
  color: var(--warn);
}
button[onclick*="avaliacao"].active {
  background: rgba(204, 51, 51, 0.1);
  color: var(--bad);
}
button[onclick*="revisao"].active {
  background: rgba(107, 79, 176, 0.1);
  color: var(--purple);
}

/* legend */
.legend {
  max-width: 860px;
  margin: 0 auto 1.5rem;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--label-dim);
}
.legend-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

/* mes */
.mes-bloco {
  max-width: 860px;
  margin: 0 auto 2rem;
}
.mes-header {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.mes-nome {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--label-dim);
}
.mes-info {
  font-size: 11px;
  color: var(--label-faint2);
  font-style: italic;
}

/* cards */
.aula-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 8px;
  background: var(--bg3);
  overflow: hidden;
  transition: border-color 0.15s;
}
.aula-card:hover {
  border-color: var(--border2);
}
.aula-card.open {
  border-color: var(--border2);
}
.aula-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.9rem 1.25rem;
  cursor: pointer;
  user-select: none;
}
.aula-num {
  font-size: 11px;
  color: var(--label-faint2);
  min-width: 48px;
}
.aula-date {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  min-width: 110px;
}
.aula-titulo {
  font-size: 13px;
  color: var(--text-muted);
  flex: 1;
}
.aula-badge {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 99px;
  white-space: nowrap;
  font-weight: 500;
}
.aula-horas {
  font-size: 12px;
  color: var(--label-faint2);
  min-width: 28px;
  text-align: right;
}
.chevron {
  font-size: 9px;
  color: var(--label-faint2);
  transition: transform 0.2s;
  min-width: 12px;
  text-align: center;
}
.aula-card.open .chevron {
  transform: rotate(180deg);
}

/* body */
.aula-body {
  display: none;
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid var(--border);
  margin-top: 0;
  padding-top: 1rem;
}
.aula-card.open .aula-body {
  display: block;
}
.body-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.body-col h4 {
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--label-dim);
  margin-bottom: 6px;
}
.body-col ul {
  list-style: none;
}
.body-col ul li {
  font-size: 13px;
  color: var(--text-dim);
  padding: 3px 0;
  display: flex;
  gap: 6px;
}
.body-col ul li::before {
  content: "·";
  color: var(--label-faint2);
  flex-shrink: 0;
}
.tempo-wrap {
  margin-bottom: 8px;
}
.tempo-bar {
  display: flex;
  height: 5px;
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 4px;
}
.tempo-t {
  background: rgba(0, 102, 204, 0.15);
}
.tempo-p {
  background: rgba(13, 134, 89, 0.1);
}
.tempo-label {
  font-size: 11px;
  color: var(--label-faint2);
}
.acum-line {
  font-size: 12px;
  color: var(--label-faint2);
  margin-top: 8px;
}
.acum-line a {
  color: var(--accent);
  font-size: 12px;
}

/* badge variants */
.aula-badge--teoria {
  background: rgba(0, 102, 204, 0.1);
  color: var(--accent);
}
.aula-badge--pratica {
  background: rgba(13, 134, 89, 0.1);
  color: var(--good);
}
.aula-badge--projeto {
  background: rgba(166, 124, 0, 0.1);
  color: var(--warn);
}
.aula-badge--avaliacao {
  background: rgba(204, 51, 51, 0.1);
  color: var(--bad);
}
.aula-badge--revisao {
  background: rgba(107, 79, 176, 0.1);
  color: var(--purple);
}

/* legend dot variants */
.legend-dot--teoria {
  background: var(--accent);
}
.legend-dot--pratica {
  background: var(--good);
}
.legend-dot--projeto {
  background: var(--warn);
}
.legend-dot--avaliacao {
  background: var(--bad);
}
.legend-dot--revisao {
  background: var(--purple);
}

.hidden {
  display: none !important;
}

/* ── THEME TOGGLE BUTTON ── */
.theme-toggle-index {
  position: fixed;
  bottom: 20px;
  left: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--accent);
  color: var(--bg);
  font-size: 22px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9998;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
}

.theme-toggle-index:hover {
  transform: scale(1.12);
  box-shadow: 0 6px 20px rgba(0, 102, 204, 0.5);
}

.theme-toggle-index:active {
  transform: scale(0.95);
}

html.light-mode .theme-toggle-index {
  background: var(--bg3);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.2);
}

html.light-mode .theme-toggle-index:hover {
  box-shadow: 0 6px 20px rgba(0, 102, 204, 0.4);
}

@media (max-width: 768px) {
  body {
    padding: 1.25rem 1rem 4rem;
  }

  .page-header {
    margin-bottom: 1.5rem;
  }
  .page-header h1 {
    font-size: 19px;
  }
  .page-header p {
    font-size: 12px;
  }

  /* stats: 2 colunas com gap */
  .stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 1rem;
  }
  .stat {
    padding: 0.6rem 0.875rem;
  }
  .stat-value {
    font-size: 20px;
  }

  /* filtros e legenda com mais espaço */
  .filters {
    gap: 6px;
    margin-bottom: 1rem;
  }
  .legend {
    margin-bottom: 1.75rem;
  }

  /* meses */
  .mes-bloco {
    margin-bottom: 2.5rem;
  }
  .mes-header {
    margin-bottom: 12px;
  }

  /* cards: mais respiro entre eles */
  .aula-card {
    margin-bottom: 10px;
    border-radius: 10px;
  }

  /* card header: 3 linhas limpas
     linha 1 → título (destaque) + chevron
     linha 2 → num · date · horas
     linha 3 → badge(s)
     titulo ocupa calc(100% - 28px) para forçar a quebra correta */
  .aula-header {
    flex-wrap: wrap;
    row-gap: 10px;
    column-gap: 8px;
    padding: 1rem;
    align-items: center;
  }
  .aula-titulo {
    order: 1;
    flex: 0 0 calc(100% - 28px);
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
  }
  .chevron {
    order: 2;
    flex: 0 0 auto;
    align-self: flex-start;
    margin-top: 5px;
  }
  .aula-num {
    order: 3;
    flex: 0 0 auto;
    font-size: 11px;
    color: var(--label-dim);
    min-width: unset;
  }
  .aula-date {
    order: 4;
    flex: 1;
    font-size: 12px;
    color: var(--label-faint);
    min-width: unset;
    font-weight: 400;
  }
  .aula-horas {
    order: 5;
    flex: 0 0 auto;
    font-size: 12px;
    color: var(--label-dim);
  }
  .aula-badge {
    order: 6;
  }

  /* body expandido */
  .body-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .aula-body {
    padding: 0 1rem 1.25rem;
    padding-top: 1rem;
  }
}