/* ============================================
   SIMULACROS ICFES - Premium Blue Design
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,400&display=swap');

:root {
  --primary-900: #0d2b6b;
  --primary-800: #1040a0;
  --primary-700: #1565C0;
  --primary-600: #1976D2;
  --primary-500: #2196F3;
  --primary-400: #42A5F5;
  --primary-300: #90CAF9;
  --primary-200: #BBDEFB;
  --primary-100: #dceeff;
  --primary-50:  #EFF6FF;

  --accent: #29B6F6;
  --accent2: #1565C0;
  --gold: #f5c842;
  --success: #10c27a;
  --danger: #ff4757;
  --warning: #ffa502;

  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  --font-display: 'Outfit', sans-serif;
  --font-body: 'DM Sans', sans-serif;

  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,82,255,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow: 0 4px 16px rgba(0,82,255,0.12), 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,82,255,0.18), 0 4px 16px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,82,255,0.22), 0 8px 24px rgba(0,0,0,0.15);

  --sidebar-w: 270px;
  --header-h: 64px;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

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

html { font-size: 15px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: #EFF6FF;
  color: var(--gray-800);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--primary-50); }
::-webkit-scrollbar-thumb { background: var(--primary-300); border-radius: 3px; }

/* ── ADMIN LAYOUT ── */
.admin-wrapper {
  display: flex;
  min-height: 100vh;
}

/* ── SIDEBAR ── */
.sidebar {
  width: var(--sidebar-w);
  background: linear-gradient(180deg, #0d2b6b 0%, #1040a0 40%, #1565C0 100%);
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition);
  box-shadow: 4px 0 24px rgba(0,0,0,0.25);
}

.sidebar-brand {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-brand .brand-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--primary-400), var(--accent));
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 16px rgba(43,127,255,0.4);
  flex-shrink: 0;
}

.sidebar-brand h1 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.sidebar-brand p {
  font-size: 0.72rem;
  color: var(--primary-200);
  margin-top: 2px;
}

.sidebar-nav {
  padding: 16px 12px;
  flex: 1;
}

.nav-section-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-300);
  padding: 12px 8px 6px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
  margin-bottom: 2px;
  position: relative;
}

.nav-link:hover {
  background: rgba(255,255,255,0.08);
  color: var(--white);
  transform: translateX(3px);
}

.nav-link.active {
  background: linear-gradient(135deg, rgba(43,127,255,0.25), rgba(0,198,255,0.15));
  color: var(--white);
  box-shadow: inset 2px 0 0 var(--primary-400);
}

.nav-link .nav-icon {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 8px;
  font-size: 16px;
  flex-shrink: 0;
  background: rgba(255,255,255,0.05);
  transition: all var(--transition);
}

.nav-link:hover .nav-icon,
.nav-link.active .nav-icon {
  background: rgba(43,127,255,0.3);
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-footer a {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all var(--transition);
}

.sidebar-footer a:hover {
  background: rgba(255,60,60,0.15);
  color: #ff6b6b;
}

/* ── MAIN CONTENT ── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── TOPBAR ── */
.topbar {
  height: var(--header-h);
  background: linear-gradient(135deg, #1565C0, #1976D2);
  border-bottom: 1px solid rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky; top: 0;
  z-index: 90;
  box-shadow: 0 2px 12px rgba(21,101,192,0.3);
}

.page-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.topbar-left {
  display: flex; align-items: center; gap: 16px;
}

.breadcrumb {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.7);
}

.breadcrumb a { color: rgba(255,255,255,0.85); text-decoration: none; }
.breadcrumb a:hover { color: #fff; }

.topbar-right {
  display: flex; align-items: center; gap: 12px;
}

.topbar-avatar {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.2);
  border: 2px solid rgba(255,255,255,0.35);
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700; font-size: 0.85rem;
  cursor: pointer;
}

/* ── PAGE CONTENT ── */
.page-content {
  padding: 28px;
  flex: 1;
}

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

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

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, #EFF6FF, var(--white));
}

.card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-900);
  display: flex; align-items: center; gap: 8px;
}

.card-body {
  padding: 24px;
}

/* ── STATS CARDS ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 22px;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent));
}

.stat-card .stat-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  margin-bottom: 14px;
}

.stat-card .stat-value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-900);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-card .stat-label {
  font-size: 0.8rem;
  color: var(--gray-500);
  font-weight: 500;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--accent2));
  color: var(--white);
  box-shadow: 0 4px 16px rgba(43,127,255,0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(43,127,255,0.5);
  filter: brightness(1.1);
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
}

.btn-secondary:hover {
  background: var(--gray-200);
  transform: translateY(-1px);
}

.btn-success {
  background: linear-gradient(135deg, #0d9e6a, var(--success));
  color: var(--white);
  box-shadow: 0 4px 16px rgba(16,194,122,0.3);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(16,194,122,0.45);
}

.btn-danger {
  background: linear-gradient(135deg, #d63031, var(--danger));
  color: var(--white);
  box-shadow: 0 4px 16px rgba(255,71,87,0.3);
}

.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,71,87,0.45);
}

.btn-warning {
  background: linear-gradient(135deg, #e17000, var(--warning));
  color: var(--white);
}

.btn-outline {
  background: transparent;
  color: var(--primary-500);
  border: 2px solid var(--primary-300);
}

.btn-outline:hover {
  background: var(--primary-50);
  border-color: var(--primary-500);
}

.btn-sm { padding: 7px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-icon { padding: 8px; width: 36px; height: 36px; }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ── FORMS ── */
.form-group { margin-bottom: 20px; }

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-label .required { color: var(--danger); margin-left: 3px; }

.form-control {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius);
  border: 1.5px solid var(--gray-200);
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--gray-800);
  background: var(--white);
  transition: all var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary-400);
  box-shadow: 0 0 0 3px rgba(43,127,255,0.12);
}

.form-control::placeholder { color: var(--gray-400); }

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.form-text {
  font-size: 0.78rem;
  color: var(--gray-500);
  margin-top: 5px;
}

/* ── TABLES ── */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead {
  background: linear-gradient(135deg, #1565C0, #1976D2);
  color: var(--white);
}

thead th {
  padding: 14px 16px;
  text-align: left;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

tbody tr {
  border-bottom: 1px solid var(--gray-100);
  transition: background var(--transition);
}

tbody tr:hover {
  background: var(--primary-50);
}

tbody td {
  padding: 13px 16px;
  font-size: 0.875rem;
  color: var(--gray-700);
}

tbody tr:last-child { border-bottom: none; }

/* ── BADGES ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.badge-primary { background: var(--primary-100); color: var(--primary-600); }
.badge-success { background: rgba(16,194,122,0.12); color: #0a7a52; }
.badge-warning { background: rgba(255,165,2,0.12); color: #b06e00; }
.badge-danger { background: rgba(255,71,87,0.12); color: #c02030; }
.badge-gray { background: var(--gray-100); color: var(--gray-600); }

/* ── MODAL ── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  opacity: 0; pointer-events: none;
  transition: opacity var(--transition);
}

.modal-overlay.open {
  opacity: 1; pointer-events: all;
}

.modal {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition);
}

.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
}

.modal-lg { max-width: 860px; }
.modal-xl { max-width: 1100px; }

.modal-header {
  padding: 22px 26px;
  border-bottom: 1px solid var(--gray-100);
  display: flex; align-items: center; justify-content: space-between;
  background: linear-gradient(135deg, #1565C0, #1976D2);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  display: flex; align-items: center; gap: 10px;
}

.modal-close {
  width: 32px; height: 32px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.1);
  border: none;
  color: var(--white);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  transition: background var(--transition);
}

.modal-close:hover { background: rgba(255,255,255,0.2); }

.modal-body { padding: 26px; }
.modal-footer {
  padding: 16px 26px;
  border-top: 1px solid var(--gray-100);
  display: flex; gap: 12px; justify-content: flex-end;
  background: var(--gray-50);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

/* ── ALERTS ── */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  display: flex; align-items: flex-start; gap: 10px;
  margin-bottom: 16px;
  border-left: 4px solid;
}

.alert-success { background: rgba(16,194,122,0.08); color: #0a7a52; border-color: var(--success); }
.alert-danger { background: rgba(255,71,87,0.08); color: #c02030; border-color: var(--danger); }
.alert-warning { background: rgba(255,165,2,0.08); color: #b06e00; border-color: var(--warning); }
.alert-info { background: var(--primary-50); color: var(--primary-700); border-color: var(--primary-400); }

/* ── TABS ── */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 4px;
  margin-bottom: 24px;
}

.tab-btn {
  flex: 1;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--gray-600);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center; gap: 7px;
}

.tab-btn.active {
  background: var(--white);
  color: var(--primary-600);
  box-shadow: var(--shadow-sm);
}

.tab-btn:hover:not(.active) {
  background: rgba(255,255,255,0.5);
  color: var(--gray-800);
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── SIMULACRO STEPS ── */
.steps-nav {
  display: flex;
  gap: 0;
  margin-bottom: 28px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.step-item {
  flex: 1;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-right: 1px solid var(--gray-200);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
}

.step-item:last-child { border-right: none; }
.step-item:hover { background: var(--primary-50); }
.step-item.active { background: linear-gradient(135deg, var(--primary-50), rgba(43,127,255,0.05)); }
.step-item.done { background: rgba(16,194,122,0.04); }

.step-num {
  width: 28px; height: 28px;
  border-radius: var(--radius-full);
  background: var(--gray-200);
  color: var(--gray-500);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}

.step-item.active .step-num {
  background: linear-gradient(135deg, var(--primary-500), var(--accent));
  color: var(--white);
  box-shadow: 0 4px 12px rgba(43,127,255,0.4);
}

.step-item.done .step-num {
  background: var(--success);
  color: var(--white);
}

.step-text { font-size: 0.78rem; font-weight: 600; color: var(--gray-600); }
.step-item.active .step-text { color: var(--primary-700); }

/* ── QUESTION GRID ── */
.question-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
  gap: 8px;
  padding: 16px;
  background: var(--gray-50);
  border-radius: var(--radius);
  max-height: 400px;
  overflow-y: auto;
}

.question-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--gray-200);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.7rem;
  font-weight: 600;
  background: var(--white);
}

.question-cell:hover { border-color: var(--primary-300); background: var(--primary-50); }
.question-cell .q-num { color: var(--gray-500); font-size: 0.65rem; }

.question-cell.answered-A { border-color: #3498db; background: rgba(52,152,219,0.08); color: #2980b9; }
.question-cell.answered-B { border-color: #e74c3c; background: rgba(231,76,60,0.08); color: #c0392b; }
.question-cell.answered-C { border-color: #2ecc71; background: rgba(46,204,113,0.08); color: #27ae60; }
.question-cell.answered-D { border-color: #f39c12; background: rgba(243,156,18,0.08); color: #d68910; }

/* ── GRADING CARD ── */
.grade-card {
  background: linear-gradient(135deg, #1040a0 0%, #1976D2 100%);
  border-radius: var(--radius-xl);
  padding: 28px;
  color: var(--white);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.grade-card::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 180px; height: 180px;
  background: radial-gradient(circle, rgba(43,127,255,0.3), transparent);
  border-radius: 50%;
}

.grade-global {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--gold);
  line-height: 1;
}

.grade-subject {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.grade-subject:last-child { border-bottom: none; }

.grade-subject-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
}

.grade-subject-score {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
}

.grade-bar {
  height: 6px;
  background: rgba(255,255,255,0.15);
  border-radius: 3px;
  margin-top: 4px;
  overflow: hidden;
}

.grade-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--primary-400));
  border-radius: 3px;
  transition: width 1s cubic-bezier(0.4,0,0.2,1);
}

/* ── LOGIN ── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0d2b6b 0%, #1040a0 40%, #1976D2 100%);
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.login-page::before {
  content: '';
  position: absolute; inset: 0;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(43,127,255,0.2) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(0,198,255,0.15) 0%, transparent 50%);
}

.login-card {
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-xl);
  padding: 44px;
  width: 100%;
  max-width: 440px;
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-xl);
  animation: slideUp 0.6s cubic-bezier(0.4,0,0.2,1);
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo .logo-circle {
  width: 80px; height: 80px;
  background: linear-gradient(135deg, var(--primary-400), var(--accent));
  border-radius: var(--radius-xl);
  display: flex; align-items: center; justify-content: center;
  font-size: 36px;
  margin: 0 auto 16px;
  box-shadow: 0 8px 32px rgba(43,127,255,0.5);
}

.login-logo h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.03em;
}

.login-logo p {
  font-size: 0.875rem;
  color: var(--primary-200);
  margin-top: 4px;
}

.login-card .form-label { color: rgba(255,255,255,0.8); }

.login-card .form-control {
  background: rgba(255,255,255,0.07);
  border-color: rgba(255,255,255,0.15);
  color: var(--white);
}

.login-card .form-control::placeholder { color: rgba(255,255,255,0.35); }
.login-card .form-control:focus {
  background: rgba(255,255,255,0.1);
  border-color: var(--primary-400);
  box-shadow: 0 0 0 3px rgba(43,127,255,0.25);
}

/* ── ANIMATIONS ── */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

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

.animate-fadeIn { animation: fadeIn 0.4s ease forwards; }
.animate-slideUp { animation: slideUp 0.4s ease forwards; }

/* Staggered card animations */
.card-grid > * { animation: slideUp 0.4s ease backwards; }
.card-grid > *:nth-child(1) { animation-delay: 0.05s; }
.card-grid > *:nth-child(2) { animation-delay: 0.1s; }
.card-grid > *:nth-child(3) { animation-delay: 0.15s; }
.card-grid > *:nth-child(4) { animation-delay: 0.2s; }

/* ── LOADING ── */
.spinner {
  width: 20px; height: 20px;
  border: 2.5px solid rgba(255,255,255,0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

/* ── TOAST ── */
#toast-container {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 9999;
  display: flex; flex-direction: column; gap: 10px;
}

.toast {
  background: var(--primary-900);
  color: var(--white);
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-xl);
  display: flex; align-items: center; gap: 10px;
  min-width: 280px;
  max-width: 400px;
  border-left: 4px solid var(--primary-400);
  animation: slideUp 0.3s ease;
  transition: all 0.3s ease;
}

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

/* ── MISC HELPERS ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.text-sm { font-size: 0.8rem; }
.text-muted { color: var(--gray-500); }
.text-primary { color: var(--primary-500); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.font-bold { font-weight: 700; }
.font-display { font-family: var(--font-display); }
.w-full { width: 100%; }
.hidden { display: none !important; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .steps-nav { flex-wrap: wrap; }
  .page-content { padding: 16px; }
}

/* ── FILE UPLOAD ── */
.file-drop {
  border: 2px dashed var(--primary-300);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--primary-50);
}

.file-drop:hover, .file-drop.dragover {
  border-color: var(--primary-500);
  background: var(--primary-100);
  transform: scale(1.01);
}

.file-drop .drop-icon { font-size: 40px; margin-bottom: 10px; }
.file-drop p { color: var(--gray-600); font-size: 0.875rem; }
.file-drop strong { color: var(--primary-600); }

/* ── CUESTIONARIO PREVIEW ── */
.cuestionario-preview {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cuestionario-header-preview {
  padding: 24px;
  display: flex; align-items: center; gap: 16px;
}

/* ── RANGE INFO ── */
.range-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  background: var(--primary-100);
  color: var(--primary-700);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

/* ── EMPTY STATE ── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--gray-400);
}

.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state h3 { font-family: var(--font-display); font-size: 1.1rem; color: var(--gray-500); margin-bottom: 6px; }
.empty-state p { font-size: 0.875rem; }