:root {
  /* Color Palette - Academic Trust & Sophistication */
  --primary: #0f172a;
  --primary-light: #1e293b;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --white: #ffffff;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  overflow-x: hidden;
}

/* Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 280px;
  background-color: var(--primary);
  color: var(--white);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-logo-text {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.nav-menu {
  list-style: none;
  padding: 0;
  margin: 0;
  flex-grow: 1;
}

.nav-item {
  margin-bottom: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1rem;
  text-decoration: none;
  color: #94a3b8;
  border-radius: 8px;
  transition: all 0.2s ease;
  font-weight: 500;
}

.nav-link:hover, .nav-link.active {
  background-color: rgba(255,255,255,0.1);
  color: var(--white);
}

.nav-link.active {
  background-color: var(--accent);
  color: var(--white);
}

/* Main Content */
.main-content {
  margin-left: 280px;
  flex: 1;
  padding: var(--space-lg);
  max-width: calc(100vw - 280px);
}

/* Header/Top Bar */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.page-title h1 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
}

.page-title p {
  margin: 4px 0 0;
  color: var(--text-muted);
}

.user-profile-summary {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 50px;
  box-shadow: var(--shadow-sm);
}

/* Dashboard Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.stat-card {
  background: var(--white);
  padding: var(--space-md);
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease;
}

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

.stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

/* Content Sections */
.section-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-lg);
}

@media (max-width: 1024px) {
  .section-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--white);
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

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

.card-title {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
}

.card-body {
  padding: var(--space-md);
}

/* Table Styles */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

th {
  padding: 12px 16px;
  background: var(--bg-main);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

td {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

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

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success { background: #dcfce7; color: #166534; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #e0f2fe; color: #075985; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  gap: var(--space-xs);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

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

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-main);
}

.btn-outline:hover {
  background: var(--bg-main);
}

/* Forms */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--primary);
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--white);
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Upload Area */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  background: var(--bg-main);
  transition: all 0.2s ease;
  cursor: pointer;
}

.upload-zone:hover {
  border-color: var(--accent);
  background: #f0f7ff;
}

.upload-zone-icon {
  width: 48px;
  height: 48px;
  color: var(--accent);
  margin: 0 auto var(--space-sm);
}

/* Auth Pages */
.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  padding: var(--space-md);
}

.auth-card {
  background: var(--white);
  width: 100%;
  max-width: 450px;
  padding: var(--space-lg);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
}

.auth-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.auth-logo {
  width: 64px;
  height: 64px;
  background: var(--accent);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  color: white;
}

/* Utilities */
.text-center { text-align: center; }
.mt-auto { margin-top: auto; }
.w-full { width: 100%; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-0 { margin-bottom: 0; }
.font-bold { font-weight: 700; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.flex-col { display: flex; flex-direction: column; }
.gap-sm { gap: var(--space-sm); }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }

/* Dashboard Specific Components */
.user-avatar {
  width: 32px;
  height: 32px;
  background: #e2e8f0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 0.8rem;
  color: #475569;
}

.trust-meter {
  text-align: center;
  margin-bottom: var(--space-md);
}

.trust-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 8px solid var(--success);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.trust-score-label {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

.trust-score-sub {
  font-size: 0.6rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
}

.progress-bar {
  height: 6px;
  background: #f1f5f9;
  border-radius: 10px;
  overflow: hidden;
  margin-top: 4px;
}

.progress-fill {
  height: 100%;
}

.info-banner {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  background: rgba(59, 130, 246, 0.05);
  border-radius: 12px;
  border: 1px solid rgba(59, 130, 246, 0.1);
  display: flex;
  gap: var(--space-sm);
}

.step-list {
  padding: 0;
  list-style: none;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.step-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.step-number {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* SVG Icons Helpers */
.placeholder-icon {
  display: inline-block;
  width: 20px;
  height: 20px;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.4s ease-out forwards;
}