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

[data-theme="dark"] {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-hover: #334155;
  --border: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --green: #22c55e;
  --yellow: #eab308;
  --red: #ef4444;
  --purple: #a855f7;
  --orange: #f97316;
  --badge-bg: rgba(0, 0, 0, 0.25);
  --zebra: rgba(15, 23, 42, 0.3);
  --header-gradient: linear-gradient(135deg, var(--accent-light), var(--purple));
}

[data-theme="light"] {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --surface-hover: #e2e8f0;
  --border: #cbd5e1;
  --text: #0f172a;
  --text-muted: #475569;
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --green: #16a34a;
  --yellow: #ca8a04;
  --red: #dc2626;
  --purple: #9333ea;
  --orange: #ea580c;
  --badge-bg: rgba(0, 0, 0, 0.06);
  --zebra: rgba(0, 0, 0, 0.03);
  --header-gradient: linear-gradient(135deg, var(--accent), var(--purple));
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: background 0.3s, border-color 0.3s;
}

.header-botoes {
  position: absolute;
  right: 2rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.header-conteudo {
  text-align: center;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--header-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

header .subtitulo {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.theme-toggle {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

.theme-toggle:hover {
  border-color: var(--accent);
  transform: scale(1.1);
}

.btn-sair {
  background: transparent;
  color: var(--red);
  border: 1px solid var(--red);
  border-radius: 8px;
  padding: 0.4rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-sair:hover {
  background: var(--red);
  color: white;
}

.escondido {
  display: none !important;
}

/* --- Tela de Login --- */

#tela-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 1.5rem;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 400px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
  transition: background 0.3s, border-color 0.3s;
}

.login-logo {
  margin-bottom: 2rem;
}

.login-icone {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.login-card h1 {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--header-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-sub {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}

.login-logo-img {
  max-width: 340px;
  width: 100%;
  margin-bottom: 1rem;
  border-radius: 8px;
}

.header-img {
  max-width: 1000px;
  width: 100%;
  margin-bottom: 0.5rem;
  border-radius: 6px;
}

.login-label {
  display: block;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

.login-campo {
  display: flex;
  gap: 0.5rem;
}

.login-campo input {
  flex: 1;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 1rem;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.login-campo input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.login-btn {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.7rem 1.2rem;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}

.login-btn:hover {
  background: var(--accent-light);
}

.login-btn:active {
  transform: scale(0.95);
}

.login-erro {
  color: var(--red);
  font-size: 0.85rem;
  margin-top: 1rem;
  font-weight: 500;
}

main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
}

.filtros {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  transition: background 0.3s, border-color 0.3s;
}

.filtro-grupo {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.filtro-grupo label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filtro-grupo select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 1rem;
  font-size: 0.95rem;
  cursor: pointer;
  min-width: 220px;
  transition: border-color 0.2s, background 0.3s, color 0.3s;
}

.filtro-grupo select:hover {
  border-color: var(--accent);
}

.filtro-grupo select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.filtro-grupo.resumo {
  margin-left: auto;
  justify-content: center;
}

#resumo-alunos {
  background: var(--accent);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}

.graficos {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.grafico-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: transform 0.2s, box-shadow 0.2s, background 0.3s, border-color 0.3s;
}

.grafico-container:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .grafico-container:hover {
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.grafico-container h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-muted);
}

.grafico-largo {
  grid-column: 1 / -1;
}

.tabela-secao {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: background 0.3s, border-color 0.3s;
}

.tabela-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.tabela-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}

.tabela-filtros {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.tabela-filtros select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.2s, background 0.3s, color 0.3s;
}

.tabela-filtros select:hover {
  border-color: var(--accent);
}

.tabela-filtros select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.btn-limpar {
  background: transparent;
  color: var(--red);
  border: 1px solid var(--red);
  border-radius: 8px;
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-limpar:hover {
  background: var(--red);
  color: white;
}

.tabela-info {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
}

#tabela-contador {
  background: var(--accent);
  color: white;
  padding: 0.3rem 0.75rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.8rem;
}

.filtro-msg {
  color: var(--yellow);
  font-style: italic;
}

.tabela-wrapper {
  max-height: 480px;
  overflow: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
}

#tabela-alunos {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

#tabela-alunos thead th {
  background: var(--bg);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: 0.75rem 1rem;
  text-align: left;
  position: sticky;
  top: 0;
  z-index: 1;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  border-bottom: 2px solid var(--border);
  transition: color 0.2s, background 0.3s;
}

#tabela-alunos thead th:hover {
  color: var(--accent-light);
}

#tabela-alunos thead th.ordenado-asc::after {
  content: " ▲";
  font-size: 0.65rem;
}

#tabela-alunos thead th.ordenado-desc::after {
  content: " ▼";
  font-size: 0.65rem;
}

#tabela-alunos tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}

#tabela-alunos tbody tr:hover {
  background: var(--surface-hover);
}

#tabela-alunos tbody tr:nth-child(even) {
  background: var(--zebra);
}

#tabela-alunos tbody tr:nth-child(even):hover {
  background: var(--surface-hover);
}

#tabela-alunos td {
  padding: 0.6rem 1rem;
  white-space: nowrap;
}

#tabela-alunos td.nome-cell {
  white-space: normal;
  min-width: 200px;
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  border-left: 3px solid;
  background: var(--badge-bg);
}

.badge-alfabetica { border-color: #3b82f6; color: #2563eb; }
.badge-silabica-alfabetica { border-color: #a855f7; color: #7c3aed; }
.badge-silabica-com-valor { border-color: #f97316; color: #ea580c; }
.badge-silabica-sem-valor { border-color: #eab308; color: #ca8a04; }
.badge-pre-silabica { border-color: #ef4444; color: #dc2626; }
.badge-sem-dados { border-color: #64748b; color: #64748b; }

.badge-n1 { border-color: #ef4444; color: #dc2626; }
.badge-n2 { border-color: #f97316; color: #ea580c; }
.badge-n3 { border-color: #eab308; color: #ca8a04; }
.badge-n4 { border-color: #22c55e; color: #16a34a; }
.badge-n5 { border-color: #3b82f6; color: #2563eb; }

.tabela-vazia {
  text-align: center;
  padding: 2rem !important;
  color: var(--text-muted);
  font-style: italic;
}

footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
  transition: border-color 0.3s;
}

@media (max-width: 768px) {
  .graficos {
    grid-template-columns: 1fr;
  }

  .filtros {
    flex-direction: column;
    align-items: stretch;
  }

  .filtro-grupo.resumo {
    margin-left: 0;
  }

  .filtro-grupo select {
    min-width: 100%;
  }

  .header-botoes {
    right: 1rem;
  }

  header {
    padding: 1.5rem 1rem;
  }

  .login-card {
    padding: 2rem 1.5rem;
  }

  .login-logo-img {
    max-width: 250px;
  }

  .header-img {
    max-width: 300px;
  }
}