/* =============================================
   SAFE Preparatório Azul – Estilos Globais
   ============================================= */

:root {
  --azul-navy: #0A2140;
  --azul-blue: #0057B8;
  --azul-light: #4a90d9;
  --azul-sky: #e8f2fc;
  --safe-dark: #111827;
  --success: #16a34a;
  --success-bg: #dcfce7;
  --warning: #d97706;
  --warning-bg: #fef3c7;
  --danger: #dc2626;
  --danger-bg: #fee2e2;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --white: #ffffff;
  --border-radius: 10px;
  --border-radius-sm: 6px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
  --shadow: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.18);
  --transition: 0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
}

/* ---- UTILITY ---- */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-muted { color: var(--gray-500); font-size: 0.875rem; }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.w-full { width: 100%; }

/* ---- TOPBAR ---- */
.topbar {
  background: var(--azul-navy);
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.topbar-brand img {
  height: 36px;
  object-fit: contain;
}

.topbar-brand .brand-sep {
  width: 1px;
  height: 28px;
  background: rgba(255,255,255,0.3);
}

.topbar-title {
  color: var(--white);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.topbar-user {
  color: rgba(255,255,255,0.85);
  font-size: 0.9rem;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1.2rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1.4;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--azul-blue);
  color: var(--white);
}
.btn-primary:hover:not(:disabled) { background: #0046a0; transform: translateY(-1px); }

.btn-navy {
  background: var(--azul-navy);
  color: var(--white);
}
.btn-navy:hover:not(:disabled) { background: #071a33; }

.btn-success {
  background: var(--success);
  color: var(--white);
}
.btn-success:hover:not(:disabled) { background: #15803d; }

.btn-danger {
  background: var(--danger);
  color: var(--white);
}
.btn-danger:hover:not(:disabled) { background: #b91c1c; }

.btn-warning {
  background: var(--warning);
  color: var(--white);
}
.btn-warning:hover:not(:disabled) { background: #b45309; }

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--gray-300);
  color: var(--gray-700);
}
.btn-outline:hover:not(:disabled) { border-color: var(--azul-blue); color: var(--azul-blue); }

.btn-outline-danger {
  background: transparent;
  border: 1.5px solid var(--danger);
  color: var(--danger);
}
.btn-outline-danger:hover:not(:disabled) { background: var(--danger-bg); }

.btn-sm { padding: 0.35rem 0.85rem; font-size: 0.8rem; }
.btn-lg { padding: 0.75rem 1.8rem; font-size: 1rem; }
.btn-xl { padding: 1rem 2.5rem; font-size: 1.15rem; font-weight: 600; }
.btn-block { width: 100%; }

.btn-logout {
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.9);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
}
.btn-logout:hover { background: rgba(255,255,255,0.2); }

/* ---- FORMS ---- */
.form-group {
  margin-bottom: 1.2rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.6rem 0.9rem;
  border: 1.5px solid var(--gray-300);
  border-radius: var(--border-radius-sm);
  font-size: 0.95rem;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--azul-blue);
  box-shadow: 0 0 0 3px rgba(0,87,184,0.12);
}

.form-control.error { border-color: var(--danger); }

select.form-control { cursor: pointer; }

.form-error {
  color: var(--danger);
  font-size: 0.8rem;
  margin-top: 0.3rem;
}

/* ---- CARDS ---- */
.card {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  overflow: hidden;
}

.card-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--gray-50);
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--azul-navy);
}

.card-body { padding: 1.5rem; }

/* ---- BADGES ---- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-info { background: var(--azul-sky); color: var(--azul-blue); }
.badge-locked { background: var(--gray-100); color: var(--gray-500); }

/* ---- TABLES ---- */
.table-wrapper { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

thead th {
  background: var(--gray-50);
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-500);
  border-bottom: 2px solid var(--gray-200);
  white-space: nowrap;
}

tbody td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
}

tbody tr:hover { background: var(--gray-50); }
tbody tr:last-child td { border-bottom: none; }

/* ---- ALERTS ---- */
.alert {
  padding: 0.9rem 1.2rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.9rem;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.alert-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid #fca5a5; }
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid #86efac; }
.alert-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid #fcd34d; }
.alert-info { background: var(--azul-sky); color: var(--azul-blue); border: 1px solid #93c5fd; }

/* ---- MODAL ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  backdrop-filter: blur(2px);
}

.modal {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-lg { max-width: 720px; }

.modal-header {
  padding: 1.2rem 1.5rem;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--azul-navy);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--gray-400);
  line-height: 1;
  padding: 0.2rem;
  border-radius: 4px;
}
.modal-close:hover { color: var(--gray-700); background: var(--gray-100); }

.modal-body { padding: 1.5rem; }
.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* ---- LOGIN PAGE ---- */
.login-page {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--azul-navy) 0%, var(--azul-blue) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.login-container {
  width: 100%;
  max-width: 440px;
}

.login-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.login-logos img {
  height: 52px;
  object-fit: contain;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.3));
}

.login-logos .logo-sep {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.3);
}

.login-card {
  background: var(--white);
  border-radius: 14px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  overflow: hidden;
}

.login-tabs {
  display: flex;
  border-bottom: 2px solid var(--gray-200);
}

.login-tab {
  flex: 1;
  padding: 1rem;
  background: none;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gray-500);
  cursor: pointer;
  transition: all var(--transition);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
}

.login-tab.active {
  color: var(--azul-blue);
  border-bottom-color: var(--azul-blue);
  background: var(--azul-sky);
}

.login-form {
  padding: 2rem;
}

.login-subtitle {
  text-align: center;
  color: var(--gray-500);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

/* ---- MAIN LAYOUT ---- */
.main-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  padding: 2rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.page-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--azul-navy);
  margin-bottom: 0.25rem;
}

.page-subtitle {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

/* ---- EXAM CARDS (student dashboard) ---- */
.exams-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.exam-card {
  background: var(--white);
  border-radius: var(--border-radius);
  border: 1.5px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition);
}

.exam-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.exam-card.locked { opacity: 0.72; }

.exam-card-header {
  padding: 1rem 1.2rem 0.75rem;
  border-bottom: 1px solid var(--gray-100);
}

.exam-card-icon {
  font-size: 1.8rem;
  margin-bottom: 0.4rem;
}

.exam-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--azul-navy);
}

.exam-card-body { padding: 1rem 1.2rem; }

.exam-card-meta {
  display: flex;
  gap: 1.2rem;
  margin-bottom: 1rem;
}

.exam-meta-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--gray-500);
}

.exam-card-score {
  background: var(--azul-sky);
  border-radius: var(--border-radius-sm);
  padding: 0.6rem 0.9rem;
  margin-bottom: 1rem;
}

.exam-card-score .score-label {
  font-size: 0.75rem;
  color: var(--gray-500);
}

.exam-card-score .score-value {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--azul-blue);
}

/* ---- EXAM INTERFACE (fullscreen) ---- */
#exam-overlay {
  position: fixed;
  inset: 0;
  background: var(--white);
  z-index: 9000;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.exam-topbar {
  background: var(--azul-navy);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.exam-topbar-info {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.exam-subject {
  color: var(--white);
  font-weight: 700;
  font-size: 1rem;
}

.exam-progress-text {
  color: rgba(255,255,255,0.7);
  font-size: 0.875rem;
}

.exam-timer {
  background: rgba(255,255,255,0.15);
  color: var(--white);
  border-radius: 6px;
  padding: 0.3rem 0.8rem;
  font-size: 0.9rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.exam-timer.warning { background: rgba(220,38,38,0.8); }

.exam-progress-bar {
  height: 4px;
  background: rgba(255,255,255,0.2);
  flex-shrink: 0;
}

.exam-progress-fill {
  height: 100%;
  background: #22d3ee;
  transition: width 0.3s ease;
}

.exam-body {
  flex: 1;
  overflow-y: auto;
  padding: 2rem;
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
}

.question-number {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--azul-blue);
  margin-bottom: 0.75rem;
}

.question-text {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--gray-800);
  line-height: 1.65;
  margin-bottom: 2rem;
}

.options-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.option-item {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.option-label {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.2rem;
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  width: 100%;
  background: var(--white);
  text-align: left;
  font-size: 1rem;
  color: var(--gray-800);
  line-height: 1.5;
}

.option-label:hover {
  border-color: var(--azul-light);
  background: var(--azul-sky);
}

.option-input {
  display: none;
}

.option-input:checked + .option-label {
  border-color: var(--azul-blue);
  background: var(--azul-sky);
}

.option-letter {
  min-width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--gray-600);
  transition: all var(--transition);
  flex-shrink: 0;
  margin-top: 0.05rem;
}

.option-input:checked + .option-label .option-letter {
  background: var(--azul-blue);
  color: var(--white);
}

/* Review mode */
.option-label.correct { border-color: var(--success); background: var(--success-bg); }
.option-label.wrong { border-color: var(--danger); background: var(--danger-bg); }
.option-label.correct .option-letter { background: var(--success); color: var(--white); }
.option-label.wrong .option-letter { background: var(--danger); color: var(--white); }

.exam-nav {
  background: var(--white);
  border-top: 2px solid var(--gray-200);
  padding: 0.65rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  gap: 1rem;
}

.exam-nav-dots {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  justify-content: center;
  flex: 1;
}

.nav-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gray-200);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  padding: 0;
}

.nav-dot.answered { background: var(--azul-blue); }
.nav-dot.skipped { background: #f59e0b; }
.nav-dot.current { background: var(--azul-navy); box-shadow: 0 0 0 3px rgba(0,87,184,0.25); }
.nav-dot.skipped.current { background: var(--azul-navy); box-shadow: 0 0 0 3px rgba(245,158,11,0.4); }

.exam-action-bar {
  display: flex;
  justify-content: flex-end;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-100);
}

/* ---- EXAM WARNING SCREEN ---- */
.exam-warning-overlay {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, var(--azul-navy) 0%, #0a3060 100%);
  z-index: 9100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow-y: auto;
}

.exam-warning-box {
  background: var(--white);
  border-radius: 14px;
  padding: 2.5rem;
  max-width: 600px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.warning-icon { font-size: 3rem; text-align: center; margin-bottom: 1rem; }

.warning-title {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--azul-navy);
  margin-bottom: 0.5rem;
}

.warning-subtitle {
  text-align: center;
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.warning-rules {
  background: var(--danger-bg);
  border: 1px solid #fca5a5;
  border-radius: var(--border-radius-sm);
  padding: 1.2rem;
  margin-bottom: 1.5rem;
}

.warning-rules h4 {
  color: var(--danger);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.warning-rules ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.warning-rules li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--danger);
  font-weight: 500;
}

.warning-rules li::before {
  content: "✕";
  font-weight: 900;
  flex-shrink: 0;
  margin-top: 0.05rem;
}

.warning-info {
  background: var(--azul-sky);
  border: 1px solid #93c5fd;
  border-radius: var(--border-radius-sm);
  padding: 1.2rem;
  margin-bottom: 1.5rem;
}

.warning-info h4 {
  color: var(--azul-blue);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.warning-info ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.warning-info li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--azul-blue);
}

.warning-info li::before {
  content: "✔";
  font-weight: 900;
  flex-shrink: 0;
  margin-top: 0.05rem;
}

.warning-confirm {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: var(--border-radius-sm);
  border: 1.5px solid var(--gray-200);
  margin-bottom: 1.5rem;
  cursor: pointer;
}

.warning-confirm input[type="checkbox"] {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 0.15rem;
  cursor: pointer;
}

.warning-confirm label {
  font-size: 0.9rem;
  color: var(--gray-700);
  cursor: pointer;
  font-weight: 500;
}

/* ---- INVALIDATION SCREEN ---- */
.invalidation-screen {
  position: fixed;
  inset: 0;
  background: #7f1d1d;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.invalidation-box {
  color: var(--white);
  max-width: 500px;
}

.invalidation-icon { font-size: 5rem; margin-bottom: 1rem; }

.invalidation-title {
  font-size: 2.5rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.invalidation-sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  margin-bottom: 1rem;
}

.invalidation-reason {
  background: rgba(0,0,0,0.3);
  border-radius: 8px;
  padding: 1rem;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 2rem;
}

/* ---- RESULT SCREEN ---- */
.result-screen {
  padding: 2rem;
  max-width: 700px;
  margin: 0 auto;
}

.result-score-card {
  text-align: center;
  padding: 2.5rem;
  background: var(--white);
  border-radius: 14px;
  border: 2px solid var(--gray-200);
  margin-bottom: 2rem;
}

.result-score-label { font-size: 0.875rem; color: var(--gray-500); text-transform: uppercase; letter-spacing: 0.05em; }
.result-score-value {
  font-size: 4rem;
  font-weight: 900;
  line-height: 1.1;
  margin: 0.25rem 0;
}
.result-score-value.pass { color: var(--success); }
.result-score-value.fail { color: var(--danger); }
.result-score-detail { font-size: 1rem; color: var(--gray-500); }

/* ---- ADMIN TABS ---- */
.admin-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: 2rem;
  overflow: visible;
  flex-wrap: wrap;
}

.admin-tab {
  padding: 0.85rem 1.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-500);
  cursor: pointer;
  border: none;
  background: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  transition: all var(--transition);
}

.admin-tab:hover { color: var(--azul-blue); }
.admin-tab.active { color: var(--azul-blue); border-bottom-color: var(--azul-blue); }

.admin-panel { display: none; }
.admin-panel.active { display: block; }

/* ---- STATS CARDS ---- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--white);
  border-radius: var(--border-radius);
  padding: 1.2rem 1.5rem;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.stat-label { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--gray-400); margin-bottom: 0.3rem; }
.stat-value { font-size: 2rem; font-weight: 800; color: var(--azul-navy); line-height: 1; }
.stat-sub { font-size: 0.8rem; color: var(--gray-500); margin-top: 0.2rem; }

/* ---- EXAM TOGGLE (admin) ---- */
.toggle-switch {
  position: relative;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

.toggle-switch input { display: none; }

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--gray-300);
  border-radius: 13px;
  cursor: pointer;
  transition: background var(--transition);
}

.toggle-slider::before {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  background: var(--white);
  border-radius: 50%;
  top: 3px;
  left: 3px;
  transition: transform var(--transition);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.toggle-switch input:checked + .toggle-slider { background: var(--success); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(22px); }

/* ---- FILE UPLOAD ---- */
.upload-zone {
  border: 2px dashed var(--gray-300);
  border-radius: var(--border-radius);
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
}

.upload-zone:hover { border-color: var(--azul-blue); background: var(--azul-sky); }
.upload-zone.dragover { border-color: var(--azul-blue); background: var(--azul-sky); }

/* ---- SPINNER ---- */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ---- TOAST ---- */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background: var(--gray-800);
  color: var(--white);
  padding: 0.75rem 1.2rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
  max-width: 320px;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); }

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

/* ---- FOOTER ---- */
.main-footer {
  background: var(--azul-navy);
  color: rgba(255,255,255,0.5);
  text-align: center;
  padding: 1rem;
  font-size: 0.78rem;
  margin-top: auto;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 640px) {
  .topbar { padding: 0 1rem; }
  .main-content { padding: 1rem; }
  .exams-grid { grid-template-columns: 1fr; }
  .exam-body { padding: 1rem; }
  .exam-nav { padding: 0.75rem 1rem; }
  .exam-warning-box { padding: 1.5rem; }
  .admin-tabs { gap: 0; }
  .admin-tab { padding: 0.75rem 1rem; font-size: 0.8rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .modal { max-width: 100%; margin: 0; border-radius: 14px 14px 0 0; }
  .modal-overlay { align-items: flex-end; }
}

/* ---- CPF MASK ---- */
.cpf-hint { font-size: 0.78rem; color: var(--gray-400); margin-top: 0.25rem; }