/* ============================================
   UNIFIED AUTHENTICATION & FORMS STYLES
   Makerere University Model Platform
   
   ✓ Unified Font System
   ✓ Consistent Typography
   ✓ Responsive Design
   ✓ Professional Appearance
   ============================================ */

/* ============================================
   UNIFIED FONT SYSTEM (ACROSS ENTIRE PLATFORM)
   ============================================ */
:root {
  /* FONT STACK - UNIFIED ACROSS PLATFORM */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Monaco', 'Courier New', monospace;
  
  /* FONT SIZES - CONSISTENT HIERARCHY */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 32px;
  --font-size-4xl: 40px;
  
  /* FONT WEIGHTS */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* LINE HEIGHTS */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  /* Primary Colors */
  --primary: #222B45;
  --secondary: #00BFAE;
  --accent: #FFB300;
  --accent-alt: #7C4DFF;
  
  /* Neutral Colors */
  --background: #F5F7FA;
  --surface: #FFFFFF;
  --text-primary: #222B45;
  --text-secondary: #6B778C;
  --text-light: #9EAAB7;
  --border: #E0E7EF;
  
  /* Status Colors */
  --success: #4CAF50;
  --error: #F44336;
  --warning: #FF9800;
  --info: #2196F3;
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
}

/* ============================================
   GLOBAL STYLES - UNIFIED FONT USAGE
   ============================================ */

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background: var(--background);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* TYPOGRAPHY HIERARCHY */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin: 0;
  color: var(--text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
}

p {
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  margin: 0;
}

a {
  color: var(--secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #00a896;
}

small, .text-sm {
  font-size: var(--font-size-sm);
}

/* CODE BLOCKS */
code, pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

/* ============================================
   AUTH PAGE LAYOUT
   ============================================ */

/* Auth Container */
.auth-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 80px);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--background) 0%, #E8EEF5 100%);
}

.auth-card {
  background: var(--surface);
  border-radius: 12px;
  padding: var(--spacing-2xl);
  box-shadow: 0 4px 20px rgba(34, 43, 69, 0.08);
  width: 100%;
  max-width: 550px;
  border: 1px solid var(--border);
}

.auth-card h2 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary);
  text-align: center;
  margin: 0 0 var(--spacing-sm) 0;
  letter-spacing: -0.5px;
  font-family: var(--font-primary);
}

.auth-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin: 0 0 var(--spacing-2xl) 0;
  font-size: 14px;
  line-height: 1.6;
}

/* ============================================
   FORMS
   ============================================ */

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group:last-of-type {
  margin-bottom: var(--spacing-xl);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
  letter-spacing: -0.2px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="url"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="file"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--surface);
  transition: all 0.3s ease;
  box-sizing: border-box;
  line-height: 1.5;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(34, 43, 69, 0.08);
  background: rgba(34, 43, 69, 0.01);
}

.form-group input::placeholder {
  color: var(--text-light);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group small {
  display: block;
  margin-top: var(--spacing-sm);
  font-size: 12px;
  line-height: 1.5;
}

.form-group small.error {
  color: var(--error);
  font-weight: 500;
}

.form-group small.hint {
  color: var(--text-secondary);
  font-style: italic;
}

/* Form Grid for Multiple Columns */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

@media (max-width: 768px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  padding: 11px 24px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  white-space: nowrap;
  text-align: center;
  letter-spacing: -0.2px;
  border: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 8px rgba(34, 43, 69, 0.15);
}

.btn-primary:hover:not(:disabled) {
  background: #1a1f33;
  box-shadow: 0 4px 12px rgba(34, 43, 69, 0.25);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 1px 4px rgba(34, 43, 69, 0.15);
}

/* Secondary Button */
.btn-secondary {
  background: var(--background);
  color: var(--primary);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
  background: #F0F3F7;
  border-color: var(--primary);
  color: var(--primary);
}

/* Danger Button */
.btn-danger {
  background: var(--error);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: #D32F2F;
  box-shadow: 0 4px 12px rgba(244, 67, 54, 0.25);
  transform: translateY(-1px);
}

/* Button Sizes */
.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

/* Block Button (Full Width) */
.btn-block {
  width: 100%;
}

/* Nav Button (Header) */
.btn-nav {
  padding: 8px 16px;
  background: transparent;
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 500;
  border-radius: 6px;
}

.btn-nav:hover {
  background: var(--tag-bg);
  color: var(--primary);
}

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

.btn-nav.btn-primary:hover {
  background: #1a1f33;
}

/* ============================================
   MESSAGES & ALERTS
   ============================================ */

.messages {
  margin-bottom: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.alert {
  padding: var(--spacing-md);
  border-radius: 8px;
  border-left: 4px solid;
  font-size: 14px;
  line-height: 1.6;
}

.alert-error,
.alert-danger {
  background: #FFEBEE;
  color: #B71C1C;
  border-left-color: var(--error);
}

.alert-success {
  background: #E8F5E9;
  color: #1B5E20;
  border-left-color: var(--success);
}

.alert-warning {
  background: #FFF3E0;
  color: #E65100;
  border-left-color: var(--warning);
}

.alert-info {
  background: #E3F2FD;
  color: #0D47A1;
  border-left-color: var(--info);
}

/* ============================================
   AUTH FOOTER
   ============================================ */

.auth-footer {
  text-align: center;
  margin-top: var(--spacing-lg);
  font-size: 14px;
  color: var(--text-secondary);
}

.auth-footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.auth-footer a:hover {
  color: var(--secondary);
  text-decoration: underline;
}

/* ============================================
   DASHBOARD
   ============================================ */

.dashboard-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

.dashboard-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.dashboard-header h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  margin: 0 0 var(--spacing-sm) 0;
}

.dashboard-header p {
  color: var(--text-secondary);
  font-size: 16px;
  margin: 0;
}

.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.stat-card {
  background: var(--surface);
  padding: var(--spacing-xl);
  border-radius: 12px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(34, 43, 69, 0.08);
  transition: all 0.3s ease;
}

.stat-card:hover {
  box-shadow: 0 4px 16px rgba(34, 43, 69, 0.12);
  transform: translateY(-2px);
}

.stat-number {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.dashboard-content {
  background: var(--surface);
  border-radius: 12px;
  padding: var(--spacing-xl);
  border: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(34, 43, 69, 0.08);
}

.content-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--border);
  gap: var(--spacing-lg);
}

.content-header h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
}

.models-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.model-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: var(--spacing-lg);
  background: var(--surface);
  transition: all 0.3s ease;
}

.model-card:hover {
  box-shadow: 0 4px 16px rgba(34, 43, 69, 0.12);
  transform: translateY(-4px);
  border-color: var(--secondary);
}

.model-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
  gap: var(--spacing-md);
}

.model-card-header h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
  flex: 1;
}

.badge {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.badge-computer_vision {
  background: #E3F2FD;
  color: #1976D2;
}

.badge-nlp {
  background: #F3E5F5;
  color: #7B1FA2;
}

.badge-tabular {
  background: #E8F5E9;
  color: #388E3C;
}

.badge-other {
  background: #FFF3E0;
  color: #F57C00;
}

.model-description {
  color: var(--text-secondary);
  margin: var(--spacing-md) 0;
  font-size: 14px;
  line-height: 1.6;
}

.model-meta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.meta-item {
  color: var(--text-secondary);
}

.meta-item strong {
  color: var(--text-primary);
  font-weight: 600;
}

.model-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.model-actions .btn {
  flex: 1;
  justify-content: center;
}

.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
}

.empty-icon {
  font-size: 64px;
  margin-bottom: var(--spacing-lg);
}

.empty-state h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.empty-state p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   MODEL FORM
   ============================================ */

.model-form-container {
  max-width: 1000px;
  margin: var(--spacing-2xl) auto;
  padding: 0 var(--spacing-lg);
}

.form-header {
  margin-bottom: var(--spacing-2xl);
  text-align: center;
}

.form-header h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.form-header p {
  color: var(--text-secondary);
  font-size: 16px;
  margin: 0;
}

.model-form {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.form-section {
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  background: var(--background);
}

.form-section legend {
  padding: 0 var(--spacing-md);
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
}

.phase2-section {
  background: linear-gradient(135deg, #F5F7FA 0%, #EEF1FA 100%);
  border-color: var(--secondary);
}

.form-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-lg) 0;
  flex-wrap: wrap;
}

.form-buttons .btn {
  min-width: 150px;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
  :root {
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
  }

  .auth-card {
    padding: var(--spacing-xl);
  }

  .auth-card h2 {
    font-size: 24px;
  }

  .dashboard-container {
    padding: var(--spacing-lg);
  }

  .dashboard-header h1 {
    font-size: 26px;
  }

  .content-header {
    flex-direction: column;
    align-items: stretch;
  }

  .content-header .btn {
    width: 100%;
  }

  .form-section {
    padding: var(--spacing-lg);
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-buttons {
    flex-direction: column;
  }

  .form-buttons .btn {
    width: 100%;
  }

  .model-actions {
    flex-wrap: wrap;
  }

  .model-actions .btn {
    min-width: 80px;
  }

  .dashboard-stats {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .auth-card {
    border-radius: 8px;
    max-width: calc(100% - var(--spacing-lg));
  }

  .btn {
    padding: 10px 20px;
    font-size: 13px;
  }

  .form-group label {
    font-size: 13px;
  }

  .form-group input,
  .form-group select,
  .form-group textarea {
    font-size: 16px; /* Prevents zoom on iOS */
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .auth-container,
  .dashboard-container {
    background: white;
  }

  .btn {
    border: 1px solid var(--border);
  }
}