/* ============================================================
   Portal Essential — Design System v2
   Brand: Petrol #0C5C6E + Gold #F4A623 + DM Sans
   Usado por: /admin/, /professor/, /aluno/ (futuro)
   ============================================================ */

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* === CSS VARIABLES === */
:root {
  /* Brand */
  --petrol: #0C5C6E;
  --petrol-deep: #0F172A;
  --petrol-light: #148CA8;
  --petrol-pale: #E0F2F7;
  --gold: #F4A623;
  --gold-light: #FEF3C7;
  --gold-dark: #C48E20;

  /* Backgrounds */
  --bg-page: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-card-elevated: #FFFFFF;
  --bg-sidebar: #0F172A;
  --bg-sidebar-hover: rgba(255,255,255,0.06);
  --bg-sidebar-active: rgba(244,166,35,0.12);
  --bg-hover: #F1F5F9;
  --bg-secondary: #F1F5F9;
  --bg-input: #FFFFFF;
  --bg-input-focus: #FAFCFF;
  --bg-overlay: rgba(15,23,42,0.5);

  /* Primary — petrol-based */
  --primary: #0C5C6E;
  --primary-light: #148CA8;
  --primary-dark: #0A4150;
  --primary-bg: #E0F2F7;

  /* Accent — gold */
  --accent: #F4A623;
  --accent-light: #FEF3C7;
  --accent-dark: #C48E20;

  /* Status */
  --success: #059669;
  --success-strong: #047857;
  --success-bg: #ECFDF5;
  --warning: #D97706;
  --warning-bg: #FFFBEB;
  --warning-dark: #8A6100;
  --danger: #DC2626;
  --danger-bg: #FEF2F2;
  --info: #0284C7;
  --info-bg: #F0F9FF;

  /* Text */
  --text-primary: #0F172A;
  --text-secondary: #64748B;
  --text-tertiary: #94A3B8;
  --text-inverse: #FFFFFF;
  --text-link: #0C5C6E;

  /* Borders */
  --border-light: #E2E8F0;
  --border-medium: #CBD5E1;
  --border-focus: #0C5C6E;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15,23,42,0.04);
  --shadow-md: 0 4px 12px rgba(15,23,42,0.06);
  --shadow-lg: 0 12px 32px rgba(15,23,42,0.10);
  --shadow-card: 0 1px 3px rgba(15,23,42,0.04), 0 1px 2px rgba(15,23,42,0.02);

  /* Dimensions */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  --sidebar-width: 256px;

  /* Typography */
  --font-family: 'DM Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-md: 15px;
  --font-size-lg: 18px;
  --font-size-xl: 22px;
  --font-size-2xl: 28px;
  --font-size-3xl: 34px;
}

/* === BASE === */
html, body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background: var(--bg-page);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  height: 100%;
}

a { color: var(--text-link); text-decoration: none; }
a:hover { color: var(--primary-light); }

::selection {
  background: var(--petrol-pale);
  color: var(--petrol-deep);
}

/* === LAYOUT: SIDEBAR + MAIN === */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* === SIDEBAR (dark petrol) === */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
  border-right: none;
}

.sidebar-header {
  padding: 24px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-header h2 {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.sidebar-header .subtitle {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
  font-weight: 500;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 0;
}

.sidebar-nav a,
.sidebar-nav button {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 20px;
  border: none;
  background: none;
  color: rgba(255,255,255,0.55);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: left;
  letter-spacing: 0.2px;
}

.sidebar-nav a:hover,
.sidebar-nav button:hover {
  background: var(--bg-sidebar-hover);
  color: rgba(255,255,255,0.9);
  text-decoration: none;
}

.sidebar-nav a.active,
.sidebar-nav button.active {
  background: var(--bg-sidebar-active);
  color: var(--gold);
  font-weight: 600;
}

.sidebar-nav .icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sidebar-nav .icon svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 1.8;
  fill: none;
}

.nav-separator {
  height: 1px;
  background: rgba(255,255,255,0.08);
  margin: 8px 20px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.55);
}

.sidebar-links {
  padding: 8px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  color: rgba(255,255,255,0.35);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.3px;
}

.sidebar-links a:hover {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
}

.sidebar-footer .btn {
  color: rgba(255,255,255,0.6);
  border-color: rgba(255,255,255,0.15);
}
.sidebar-footer .btn:hover {
  color: rgba(255,255,255,0.9);
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.25);
}

/* === MAIN CONTENT === */
.main-content {
  flex: 1;
  overflow-y: auto;
  padding: 32px 40px;
  background: var(--bg-page);
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.page-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--petrol-deep);
  letter-spacing: -0.3px;
}

.page-header .actions {
  display: flex;
  gap: 8px;
}

/* === CARDS === */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 20px;
}

.card-warm {
  background: var(--gold-light);
  border-color: rgba(244,166,35,0.2);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-header h3 {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--petrol-deep);
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  font-family: var(--font-family);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  line-height: 1.4;
}

.btn-primary {
  background: var(--petrol);
  color: var(--text-inverse);
  border-color: var(--petrol);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  box-shadow: 0 2px 8px rgba(12,92,110,0.25);
}

.btn-accent {
  background: var(--gold);
  color: var(--petrol-deep);
  border-color: var(--gold);
  font-weight: 600;
}
.btn-accent:hover {
  background: var(--gold-dark);
  border-color: var(--gold-dark);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-light);
}
.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-medium);
}

.btn-danger {
  background: var(--danger);
  color: var(--text-inverse);
  border-color: var(--danger);
}
.btn-danger:hover {
  background: #B91C1C;
}

.btn-success {
  background: var(--success-strong);
  color: var(--text-inverse);
  border-color: var(--success-strong);
}
.btn-success:hover {
  background: #036647;
  border-color: #036647;
}

.btn-sm {
  padding: 5px 10px;
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 12px 24px;
  font-size: var(--font-size-md);
}

/* === BADGES === */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  line-height: 1.6;
}

.badge-success { background: var(--success-bg); color: #065F46; }
.badge-warning { background: var(--warning-bg); color: #92400E; }
.badge-danger { background: var(--danger-bg); color: #991B1B; }
.badge-info { background: var(--info-bg); color: #075985; }
.badge-neutral { background: #F1F5F9; color: var(--text-secondary); }
.badge-primary { background: var(--primary-bg); color: var(--petrol); }

/* === TABLE === */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  text-align: left;
  padding: 10px 12px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--border-light);
}

.data-table td {
  padding: 12px;
  border-bottom: 1px solid var(--border-light);
  font-size: var(--font-size-sm);
}

.data-table tr:hover td {
  background: var(--bg-hover);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tfoot td {
  border-top: 2px solid var(--border-light);
  border-bottom: none;
  font-weight: 600;
}

/* === INPUTS === */
.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  background: var(--bg-input);
  color: var(--text-primary);
  transition: all 0.15s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--petrol);
  background: var(--bg-input-focus);
  box-shadow: 0 0 0 3px rgba(12,92,110,0.08);
}

.form-textarea { resize: vertical; min-height: 80px; }

/* === FILTERS BAR === */
.filters-bar {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.filter-chip {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-light);
  background: var(--bg-card);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-chip:hover {
  border-color: var(--border-medium);
  color: var(--text-primary);
}

.filter-chip.active {
  background: var(--petrol);
  border-color: var(--petrol);
  color: var(--text-inverse);
  font-weight: 500;
}

/* === SEARCH === */
.search-box {
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 9px 12px 9px 36px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  background: var(--bg-card);
  color: var(--text-primary);
  transition: all 0.15s ease;
}

.search-box input:focus {
  outline: none;
  border-color: var(--petrol);
  box-shadow: 0 0 0 3px rgba(12,92,110,0.08);
}

.search-box .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
}

/* === MODAL === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 560px;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
}

.modal-body { overflow-y: auto; flex: 1; padding: 24px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-light);
}

.modal-header h2 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--petrol-deep);
}

.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 16px 24px;
  border-top: 1px solid var(--border-light);
}

/* === TOAST === */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-inverse);
  box-shadow: var(--shadow-md);
  animation: slideIn 0.3s ease;
  max-width: 400px;
}

.toast-success { background: #065F46; }
.toast-error { background: #991B1B; }
.toast-warning { background: #92400E; }
.toast-info { background: var(--petrol); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* === PROGRESS BAR === */
.progress-bar {
  height: 6px;
  background: var(--border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
  background: var(--petrol);
}

.progress-bar-fill.low { background: var(--danger); }
.progress-bar-fill.mid { background: var(--warning); }
.progress-bar-fill.high { background: var(--success); }

/* === TABS === */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 16px;
}

.tab {
  padding: 10px 16px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s ease;
  font-family: var(--font-family);
}

.tab:hover { color: var(--text-primary); }

.tab.active {
  color: var(--petrol);
  border-bottom-color: var(--petrol);
  font-weight: 600;
}

/* === STATS GRID === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s ease;
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
}

.stat-card .stat-label {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

.stat-card .stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-top: 4px;
  color: var(--petrol-deep);
}

.stat-card .stat-change {
  font-size: var(--font-size-xs);
  margin-top: 4px;
}

/* === CONFIRM DIALOG === */
.confirm-overlay {
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
}

/* === SEARCH RESULTS DROPDOWN === */
.search-results-dropdown {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.search-result-item {
  padding: 10px 12px;
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: background 0.1s ease;
  border-bottom: 1px solid var(--border-light);
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background: var(--bg-hover);
}

/* === AULA ROWS (detail panel) === */
.aula-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 0;
  border-bottom: 2px solid var(--border-light);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* BUG-027: layout em colunas alinhadas (sem linhas divisórias visuais entre colunas) */
.aula-row {
  display: grid;
  grid-template-columns: 60px 200px 130px 200px 1fr 130px;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: var(--font-size-sm);
}

.aula-row:last-child { border-bottom: none; }

.aula-num {
  font-weight: 600;
  color: var(--petrol);
  text-align: left;
}

.aula-date { min-width: 0; }
.aula-date > div:first-child { white-space: nowrap; }
.aula-time-col { color: var(--text-secondary); white-space: nowrap; }
.aula-status-col {}
.aula-actions {
  display: flex;
  gap: 4px;
  justify-content: flex-end;
}

.aula-row.aula-header {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 8px 0;
  border-bottom: 2px solid var(--border-light);
}

/* Linha extra (deadline reposição, alunos toggle) — full-width abaixo da aula */
.aula-row-extra {
  padding: 4px 0 8px 72px;
  font-size: 12px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
}

/* === HORARIO ROW (wizard) === */
.horario-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.horario-row select,
.horario-row input[type="time"] {
  padding: 6px 10px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  background: var(--bg-input);
  color: var(--text-primary);
}

/* === UTILITY === */
.hidden { display: none !important; }
.text-muted { color: var(--text-tertiary); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mt-8 { margin-top: 8px; }
.w-full { width: 100%; }
.table-scroll { overflow-x: auto; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* === FOCUS STYLES === */
.btn:focus-visible,
.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible {
  outline: 2px solid var(--petrol);
  outline-offset: 2px;
}

/* === LOADING SPINNER === */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-light);
  border-top-color: var(--petrol);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  flex-direction: column;
  gap: 12px;
  color: var(--text-tertiary);
}

/* === SCROLLBAR (custom for sidebar) === */
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }

.main-content::-webkit-scrollbar { width: 6px; }
.main-content::-webkit-scrollbar-track { background: transparent; }
.main-content::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 6px; }
.main-content::-webkit-scrollbar-thumb:hover { background: var(--border-medium); }

/* === DISABLED BUTTON === */
.btn:disabled, .btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* === HAMBURGER BUTTON (hidden on desktop) === */
.hamburger-btn {
  display: none !important;
}

/* === RESPONSIVE: TABLET (max-width: 1024px) === */
@media (max-width: 1024px) {
  :root { --sidebar-width: 0px; }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 256px;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 900;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar.open::before {
    content: '';
    position: fixed;
    top: 0; left: 256px; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
    z-index: -1;
  }
  .main-content { margin-left: 0; padding: 16px; padding-top: 56px; }
  .hamburger-btn { display: flex !important; }
}

/* === RESPONSIVE: MOBILE (max-width: 640px) === */
@media (max-width: 640px) {
  .main-content { padding: 12px; padding-top: 56px; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .table-container { overflow-x: auto; }
  .modal { width: 95vw !important; max-height: 90vh; }
  .modal-body { padding: 16px; }
  .btn, .btn-sm, .filter-chip, .status-btn, .modal-close { min-height: 44px; min-width: 44px; /* touch targets */ }
  .page-header { flex-direction: column; align-items: flex-start; gap: 12px; }
  .page-header h1 { font-size: var(--font-size-xl); }
  .turmas-grid { grid-template-columns: 1fr; }
}