/* === 万犀教育 · 西湖区创新实践中心 管理平台 === */
/* Glassmorphism + wanxiai.com design language */

:root {
  --primary: #3B82F6;
  --primary-light: #60A5FA;
  --primary-dark: #1D4ED8;
  --primary-50: #EFF6FF;
  --primary-100: #DBEAFE;
  --success: #10B981;
  --success-light: #ECFDF5;
  --warning: #F59E0B;
  --warning-light: #FFFBEB;
  --danger: #EF4444;
  --danger-light: #FEF2F2;
  --purple: #8B5CF6;
  --pink: #EC4899;
  --indigo: #6366F1;
  --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;
  --gray-900: #111827;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --glass-bg: rgba(255,255,255,0.72);
  --glass-border: rgba(255,255,255,0.45);
  --glass-shadow: 0 8px 32px rgba(0,0,0,0.06);
  --glass-shadow-lg: 0 16px 48px rgba(0,0,0,0.08);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --font: "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
  font-family: var(--font);
  background: linear-gradient(135deg, #EFF6FF 0%, #F0F9FF 25%, #F5F3FF 50%, #FDF2F8 75%, #FFF7ED 100%);
  background-attachment: fixed;
  color: var(--text);
  min-height: 100vh;
  letter-spacing: 0.01em;
  position: relative;
}

/* Subtle grid overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* ===== Navigation ===== */
.glass-nav {
  background: rgba(255,255,255,0.78);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid rgba(255,255,255,0.6);
  box-shadow: 0 2px 20px rgba(0,0,0,0.04);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.glass-nav .navbar-brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--gray-800);
  display: flex;
  align-items: center;
  gap: 10px;
}

.glass-nav .brand-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  box-shadow: 0 2px 8px rgba(59,130,246,0.3);
}

.glass-nav .nav-link {
  color: var(--gray-600) !important;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  border-radius: 8px;
  transition: all 0.2s;
  position: relative;
}

.glass-nav .nav-link:hover,
.glass-nav .nav-link.active {
  color: var(--primary) !important;
  background: var(--primary-50);
}

.glass-nav .dropdown-menu {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
  padding: 0.5rem;
  margin-top: 0.5rem;
}

.glass-nav .dropdown-item {
  border-radius: 6px;
  font-size: 0.85rem;
  padding: 0.5rem 0.75rem;
  transition: all 0.15s;
}

.glass-nav .dropdown-item:hover {
  background: var(--primary-50);
  color: var(--primary);
}

.user-badge {
  background: var(--primary-50) !important;
  color: var(--primary) !important;
  font-weight: 500;
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 20px;
}

.btn-outline-light-sm {
  background: rgba(255,255,255,0.5);
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--gray-700);
  font-size: 0.8rem;
  padding: 0.3rem 0.8rem;
  border-radius: 8px;
  transition: all 0.2s;
}

.btn-outline-light-sm:hover {
  background: rgba(255,255,255,0.8);
  color: var(--primary);
}

/* ===== Main Content ===== */
.main-content {
  position: relative;
  z-index: 1;
  padding-top: 1.5rem;
  padding-bottom: 3rem;
}

/* ===== Glassmorphism Cards ===== */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  transition: all 0.3s ease;
}

.glass-card:hover {
  box-shadow: var(--glass-shadow-lg);
  transform: translateY(-2px);
}

.glass-card .card-header {
  background: transparent;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 1rem 1.25rem;
  color: var(--gray-700);
}

.glass-card .card-body {
  padding: 1.25rem;
}

/* ===== Stat Cards (Dashboard) ===== */
.stat-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.35rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all 0.3s ease;
  box-shadow: var(--glass-shadow);
}

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

.stat-icon {
  width: 50px; height: 50px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  flex-shrink: 0;
}

.stat-icon.blue   { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
.stat-icon.green  { background: linear-gradient(135deg, #34D399, var(--success)); }
.stat-icon.amber  { background: linear-gradient(135deg, #FBBF24, var(--warning)); }
.stat-icon.purple { background: linear-gradient(135deg, #A78BFA, var(--purple)); }
.stat-icon.pink   { background: linear-gradient(135deg, #F472B6, var(--pink)); }
.stat-icon.indigo { background: linear-gradient(135deg, #818CF8, var(--indigo)); }

.stat-info { flex: 1; }
.stat-value { font-size: 1.6rem; font-weight: 700; line-height: 1.1; }
.stat-label { font-size: 0.8rem; color: var(--text-secondary); margin-top: 2px; }

/* ===== Buttons ===== */
.btn {
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.5rem 1.25rem;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #2563EB);
  color: #fff;
  box-shadow: 0 2px 8px rgba(59,130,246,0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2563EB, var(--primary-dark));
  box-shadow: 0 4px 16px rgba(59,130,246,0.35);
  transform: translateY(-1px);
}

.btn-success {
  background: linear-gradient(135deg, #34D399, var(--success));
  color: #fff;
  box-shadow: 0 2px 8px rgba(16,185,129,0.25);
}

.btn-success:hover {
  box-shadow: 0 4px 16px rgba(16,185,129,0.35);
  transform: translateY(-1px);
}

.btn-outline-primary {
  background: transparent;
  border: 1.5px solid var(--primary);
  color: var(--primary);
}

.btn-outline-primary:hover {
  background: var(--primary);
  color: #fff;
}

.btn-outline-secondary {
  background: transparent;
  border: 1.5px solid var(--gray-300);
  color: var(--gray-600);
}

.btn-outline-secondary:hover {
  background: var(--gray-100);
  border-color: var(--gray-400);
}

.btn-sm { font-size: 0.8rem; padding: 0.35rem 0.8rem; }
.btn-lg { font-size: 0.95rem; padding: 0.65rem 1.75rem; }

/* ===== Tables ===== */
.glass-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.glass-table thead th {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: none;
  letter-spacing: 0;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid rgba(0,0,0,0.06);
  background: rgba(0,0,0,0.015);
}

.glass-table tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgba(0,0,0,0.04);
  font-size: 0.875rem;
  vertical-align: middle;
}

.glass-table tbody tr {
  transition: background 0.15s;
}

.glass-table tbody tr:hover {
  background: rgba(59,130,246,0.03);
}

/* ===== Form Controls ===== */
.form-control, .form-select {
  border-radius: 8px;
  border: 1.5px solid var(--gray-200);
  font-size: 0.875rem;
  padding: 0.55rem 0.85rem;
  transition: all 0.2s;
  background: rgba(255,255,255,0.7);
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
  background: #fff;
  outline: none;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 0.35rem;
}

/* ===== Alert ===== */
.alert {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  padding: 0.75rem 1.25rem;
}

.alert-success { border-left: 4px solid var(--success); }
.alert-danger  { border-left: 4px solid var(--danger); }
.alert-warning { border-left: 4px solid var(--warning); }
.alert-info    { border-left: 4px solid var(--primary); }

/* ===== Badge ===== */
.badge {
  font-weight: 500;
  font-size: 0.7rem;
  padding: 0.25em 0.6em;
  border-radius: 20px;
}

/* ===== Slide Viewer ===== */
.slide-viewer {
  aspect-ratio: 16/9;
  background: #fff;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--glass-shadow);
}

.slide-panel {
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
}

.slide-content {
  flex: 1;
  padding: 40px 60px;
  overflow-y: auto;
}

.slide-content.title_slide {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #1D4ED8 0%, #3B82F6 50%, #60A5FA 100%);
  color: #fff;
}

.slide-content.summary {
  background: var(--gray-50);
}

/* ===== Chat Bubbles ===== */
.chat-msg.user { text-align: right; }
.chat-msg.user .chat-bubble {
  background: linear-gradient(135deg, var(--primary), #2563EB);
  color: #fff;
  display: inline-block;
  padding: 7px 14px;
  border-radius: 14px 14px 4px 14px;
  max-width: 85%;
  font-size: 0.85rem;
}

.chat-msg.assistant .chat-bubble {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  display: inline-block;
  padding: 7px 14px;
  border-radius: 14px 14px 14px 4px;
  max-width: 85%;
  font-size: 0.85rem;
}

/* ===== Auth Pages ===== */
.auth-page {
  background: linear-gradient(135deg, #1E3A5F 0%, #1D4ED8 40%, #7C3AED 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.auth-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(147,197,253,0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(167,139,250,0.15) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(236,72,153,0.08) 0%, transparent 50%);
  pointer-events: none;
}

.auth-page::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.auth-container {
  width: 100%;
  max-width: 420px;
  padding: 1.5rem;
  position: relative;
  z-index: 1;
}

.auth-card {
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(40px) saturate(200%);
  -webkit-backdrop-filter: blur(40px) saturate(200%);
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: 20px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.15);
  overflow: hidden;
}

.auth-header {
  text-align: center;
  padding: 2.5rem 2rem 1.25rem;
  background: transparent;
}

.auth-logo {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #fff;
  margin: 0 auto 1rem;
  box-shadow: 0 4px 16px rgba(59,130,246,0.3);
}

.auth-header h5 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gray-800);
}

.auth-body {
  padding: 1rem 2rem 2rem;
}

.auth-body .form-control {
  background: rgba(255,255,255,0.6);
  border: 1.5px solid rgba(0,0,0,0.08);
}

.auth-body .form-control:focus {
  background: #fff;
  border-color: var(--primary);
}

.auth-body .btn-primary {
  width: 100%;
  padding: 0.65rem;
  font-size: 0.9rem;
  border-radius: 10px;
}

.auth-footer {
  text-align: center;
  padding: 0.85rem;
  background: rgba(0,0,0,0.02);
  border-top: 1px solid rgba(0,0,0,0.04);
  font-size: 0.78rem;
  color: var(--gray-400);
}

/* ===== Accordion (Assessment) ===== */
.accordion-item {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius) !important;
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.accordion-button {
  background: transparent !important;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: none !important;
}

.accordion-button:not(.collapsed) {
  color: var(--primary);
  background: var(--primary-50) !important;
}

/* ===== Page Heading ===== */
.page-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.page-heading h4 {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--gray-800);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-heading h4 i {
  color: var(--primary);
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--gray-400);
}

.empty-state i {
  font-size: 3rem;
  display: block;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .stat-card { padding: 1rem; }
  .stat-value { font-size: 1.25rem; }
  .stat-icon { width: 40px; height: 40px; font-size: 1.1rem; }
  .slide-content { padding: 20px 24px; }
  .auth-container { padding: 1rem; }
  .auth-body { padding: 1rem 1.5rem 1.5rem; }
  .auth-header { padding: 2rem 1.5rem 1rem; }
  .glass-nav .nav-link { padding: 0.4rem 0.7rem !important; font-size: 0.8rem; }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.12); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.2); }

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.stat-card, .glass-card {
  animation: fadeInUp 0.5s ease forwards;
}

/* ===== Chart container ===== */
.chart-container {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1rem;
}

/* ===== File upload ===== */
input[type="file"].form-control {
  padding: 0.4rem 0.75rem;
}

/* ===== VR Divider ===== */
.vr {
  display: inline-block;
  width: 1px;
  height: 24px;
  background: rgba(0,0,0,0.1);
  vertical-align: middle;
}