/* BelSO Design System - Shared Styles */

:root {
  /* Neutrals (global) */
  --bg-primary: #FFFFFF;
  --bg-soft: #F8FAFC;
  --card-surface: #FFFFFF;
  --border: #E2E8F0;
  --text-primary: #0F172A;
  --text-muted: #475569;
  
  /* Official accent (global, optimistic & "medal-like") */
  --amber-primary: #B45309;
  --amber-hover: #92400E;
  --amber-tint: #FEF3C7;
  
  /* BelSO (Umbrella) - Brand Cyan */
  --belso-primary: #0E7490;
  --belso-primary-hover: #155E75;
  --belso-tint-soft: #ECFEFF;
  --belso-tint-strong: #CFFAFE;
  --belso-support: #0369A1;
  --belso-support-tint: #E0F2FE;
  
  /* BelPhO (Physics) - Brand Blue */
  --belpho-primary: #2563EB;
  --belpho-hover: #1D4ED8;
  --belpho-tint-soft: #EFF6FF;
  --belpho-tint-strong: #DBEAFE;
  --belpho-support: #0E7490;
  --belpho-support-tint: #ECFEFF;
  
  /* BelAstro (Astronomy) - Brand Violet */
  --belastro-primary: #6D28D9;
  --belastro-hover: #5B21B6;
  --belastro-tint-soft: #F5F3FF;
  --belastro-tint-strong: #EDE9FE;
  --belastro-support: #4338CA;
  --belastro-support-tint: #E0E7FF;
  
  /* BelMath (Math) - Brand Emerald */
  --belmath-primary: #047857;
  --belmath-hover: #065F46;
  --belmath-tint-soft: #ECFDF5;
  --belmath-tint-strong: #D1FAE5;
  --belmath-support: #4D7C0F;
  --belmath-support-tint: #ECFCCB;
  
  /* BelOI (Informatics) - Brand Magenta */
  --beloi-primary: #C026D3;
  --beloi-hover: #A21CAF;
  --beloi-tint-soft: #FDF4FF;
  --beloi-tint-strong: #FAE8FF;
  --beloi-support: #BE123C;
  --beloi-support-tint: #FFE4E6;
  
  /* Legacy aliases for backward compatibility */
  --belso-primary-dark: var(--belso-primary-hover);
  --belso-primary-light: var(--belso-primary);
  --belso-accent: var(--amber-primary);
  --belso-gray-50: var(--bg-soft);
  --belso-gray-100: var(--bg-soft);
  --belso-gray-200: var(--border);
  --belso-gray-300: var(--border);
  --belso-gray-400: var(--text-muted);
  --belso-gray-500: var(--text-muted);
  --belso-gray-600: var(--text-muted);
  --belso-gray-700: var(--text-primary);
  --belso-gray-800: var(--text-primary);
  --belso-gray-900: var(--text-primary);
  --belpho-color: var(--belpho-primary);
  --belastro-color: var(--belastro-primary);
  --belmath-color: var(--belmath-primary);
  --beloi-color: var(--beloi-primary);
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  
  /* Spacing */
  --spacing-xs: 0.125rem;
  --spacing-sm: 0.25rem;
  --spacing-md: 0.5rem;
  --spacing-lg: 0.75rem;
  --spacing-xl: 1rem;
  --spacing-2xl: 1.5rem;
  --spacing-3xl: 2rem;
  
  /* Layout */
  --container-max-width: 1800px;
  --container-padding: 1rem;
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Transitions */
  --transition-fast: 100ms ease-in-out;
  --transition-base: 150ms ease-in-out;
}

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

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

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

a {
  color: var(--belso-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--belso-primary-hover);
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Header */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--container-padding);
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.logo img {
  height: 32px;
  width: auto;
}

.logo-department {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 400;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  color: var(--text-primary);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--belso-primary);
  background-color: var(--bg-soft);
}

.nav-link.active {
  color: var(--belso-primary);
  background-color: var(--bg-soft);
}

.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--card-surface);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  padding: var(--spacing-sm);
  margin-top: var(--spacing-xs);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
  z-index: 10;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.dropdown-item {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  border-radius: var(--border-radius);
  transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--bg-soft);
  color: var(--belso-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--belso-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--belso-primary-hover);
  color: #ffffff;
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--bg-soft);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--border);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--belso-primary) 0%, var(--belso-primary-hover) 100%);
  color: #ffffff;
  padding: var(--spacing-lg) 0;
}

.hero-content {
  display: grid;
  grid-template-columns: 30% 70%;
  gap: var(--spacing-lg);
  align-items: center;
}

.hero-logo-container {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-logo {
  height: 150px;
  width: auto;
  max-width: 100%;
}

.hero-text {
  text-align: left;
}

.hero h1 {
  color: #ffffff;
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.hero p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
}

/* Metrics Tiles */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.metric-tile {
  background: var(--card-surface);
  border: 1px solid var(--border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  text-align: center;
  transition: all var(--transition-base);
}

.metric-tile:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--belso-primary);
}

.metric-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--belso-primary);
  margin-bottom: var(--spacing-sm);
}

.metric-label {
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
}

/* Cards */
.card {
  background: var(--card-surface);
  border: 1px solid var(--border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--belso-primary);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

/* Department Cards Grid - Full Width, One Per Row */
.departments-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  margin: var(--spacing-md) 0;
}

/* Department Cards - WOW Effect */
.department-card {
  background: var(--card-surface);
  border: 2px solid var(--border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--spacing-md);
  min-height: 180px;
}

.department-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    var(--department-color, var(--belso-primary)) 0%, 
    transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 0;
}

.department-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--department-color, var(--belso-primary));
  width: 0;
  z-index: 1;
}

.department-card:hover::before {
  opacity: 0.05;
}

.department-card:hover::after {
  width: 100%;
}

.department-card:hover {
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.15), 
              0 0 0 1px var(--department-color, var(--belso-primary));
  border-color: var(--department-color, var(--belso-primary));
}

.department-card > * {
  position: relative;
  z-index: 2;
}

.department-card img {
  width: 320px !important;
  height: auto !important;
  margin: 0 !important;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.department-card .department-content {
  text-align: left;
  flex: 1;
}

.department-card h3 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-xs);
  font-weight: 800;
}

.department-card .text-muted {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.department-card p {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.department-card .btn {
  font-size: 1.25rem;
  padding: var(--spacing-md) var(--spacing-2xl);
  margin-top: var(--spacing-sm);
  font-weight: 700;
}

.department-card.belpho {
  --department-color: var(--belpho-primary);
}

.department-card.belpho .btn-primary {
  background-color: var(--belpho-primary);
  color: #ffffff;
}

.department-card.belpho .btn-primary:hover {
  background-color: var(--belpho-hover);
  color: #ffffff;
}

.department-card.belastro {
  --department-color: var(--belastro-primary);
}

.department-card.belastro .btn-primary {
  background-color: var(--belastro-primary);
  color: #ffffff;
}

.department-card.belastro .btn-primary:hover {
  background-color: var(--belastro-hover);
  color: #ffffff;
}

.department-card.belmath {
  --department-color: var(--belmath-primary);
}

.department-card.belmath .btn-primary {
  background-color: var(--belmath-primary);
  color: #ffffff;
}

.department-card.belmath .btn-primary:hover {
  background-color: var(--belmath-hover);
  color: #ffffff;
}

.department-card.beloi {
  --department-color: var(--beloi-primary);
}

.department-card.beloi .btn-primary {
  background-color: var(--beloi-primary);
  color: #ffffff;
}

.department-card.beloi .btn-primary:hover {
  background-color: var(--beloi-hover);
  color: #ffffff;
}

.department-card h3 {
  color: var(--department-color, var(--belso-primary));
  margin-bottom: var(--spacing-sm);
  text-align: left;
}

/* Department-specific body styles */
body.belpho {
  --department-primary: var(--belpho-primary);
  --department-hover: var(--belpho-hover);
  --department-tint-soft: var(--belpho-tint-soft);
  --department-tint-strong: var(--belpho-tint-strong);
  --department-support: var(--belpho-support);
  --department-support-tint: var(--belpho-support-tint);
}

body.belastro {
  --department-primary: var(--belastro-primary);
  --department-hover: var(--belastro-hover);
  --department-tint-soft: var(--belastro-tint-soft);
  --department-tint-strong: var(--belastro-tint-strong);
  --department-support: var(--belastro-support);
  --department-support-tint: var(--belastro-support-tint);
}

body.belmath {
  --department-primary: var(--belmath-primary);
  --department-hover: var(--belmath-hover);
  --department-tint-soft: var(--belmath-tint-soft);
  --department-tint-strong: var(--belmath-tint-strong);
  --department-support: var(--belmath-support);
  --department-support-tint: var(--belmath-support-tint);
}

body.beloi {
  --department-primary: var(--beloi-primary);
  --department-hover: var(--beloi-hover);
  --department-tint-soft: var(--beloi-tint-soft);
  --department-tint-strong: var(--beloi-tint-strong);
  --department-support: var(--beloi-support);
  --department-support-tint: var(--beloi-support-tint);
}

/* Department hero gradients */
body.belpho .hero {
  background: linear-gradient(135deg, var(--belpho-primary) 0%, var(--belpho-hover) 100%);
}

body.belastro .hero {
  background: linear-gradient(135deg, var(--belastro-primary) 0%, var(--belastro-hover) 100%);
}

body.belmath .hero {
  background: linear-gradient(135deg, var(--belmath-primary) 0%, var(--belmath-hover) 100%);
}

body.beloi .hero {
  background: linear-gradient(135deg, var(--beloi-primary) 0%, var(--beloi-hover) 100%);
}

/* Department buttons and links */
body.belpho .btn-primary,
body.belpho a {
  color: var(--belpho-primary);
}

body.belpho .btn-primary {
  background-color: var(--belpho-primary);
}

body.belpho .btn-primary:hover {
  background-color: var(--belpho-hover);
}

body.belpho a:hover {
  color: var(--belpho-hover);
}

body.belastro .btn-primary,
body.belastro a {
  color: var(--belastro-primary);
}

body.belastro .btn-primary {
  background-color: var(--belastro-primary);
}

body.belastro .btn-primary:hover {
  background-color: var(--belastro-hover);
}

body.belastro a:hover {
  color: var(--belastro-hover);
}

body.belmath .btn-primary,
body.belmath a {
  color: var(--belmath-primary);
}

body.belmath .btn-primary {
  background-color: var(--belmath-primary);
}

body.belmath .btn-primary:hover {
  background-color: var(--belmath-hover);
}

body.belmath a:hover {
  color: var(--belmath-hover);
}

body.beloi .btn-primary,
body.beloi a {
  color: var(--beloi-primary);
}

body.beloi .btn-primary {
  background-color: var(--beloi-primary);
}

body.beloi .btn-primary:hover {
  background-color: var(--beloi-hover);
}

body.beloi a:hover {
  color: var(--beloi-hover);
}

/* Sections */
.section {
  padding: var(--spacing-md) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.section-title h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.section-title p {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: var(--bg-soft);
  padding: var(--spacing-md) 0 var(--spacing-md);
  margin-top: var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.footer-section h4 {
  color: #ffffff;
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: var(--spacing-md);
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-disclaimer {
  background: rgba(255, 255, 255, 0.05);
  border-left: 3px solid var(--amber-primary);
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
}

/* BelSO Network Bar */
.network-bar {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-sm) 0;
  font-size: 0.875rem;
  text-align: center;
  color: var(--text-muted);
}

.network-bar a {
  color: var(--belso-primary);
  font-weight: 600;
}

/* Tables */
.table-container {
  overflow-x: auto;
  margin: var(--spacing-xl) 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-surface);
  border-radius: var(--border-radius);
  overflow: hidden;
}

thead {
  background: var(--bg-soft);
}

th, td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-weight: 600;
  color: var(--text-primary);
}

tr:hover {
  background: var(--bg-soft);
}

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

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--belso-primary);
  box-shadow: 0 0 0 3px rgba(14, 116, 144, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Badges */
.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-primary);
}

.badge-primary {
  background: var(--belso-primary);
  color: #ffffff;
}

.badge-success {
  background: var(--belso-success);
  color: #ffffff;
}

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    text-align: center;
  }
  
  .hero-logo-container {
    justify-content: center;
  }
  
  .hero-text {
    text-align: center;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1.125rem;
  }
  
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
  }
  
  .nav.active {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .departments-grid {
    gap: var(--spacing-sm);
  }
  
  .department-card {
    grid-template-columns: 1fr;
    text-align: center;
    min-height: auto;
    padding: var(--spacing-lg);
  }
  
  .department-card img {
    width: 200px !important;
    margin: 0 auto var(--spacing-sm) !important;
  }
  
  .department-card .department-content {
    text-align: center;
    margin-bottom: var(--spacing-md);
  }
  
  .department-card h3 {
    text-align: center;
    font-size: 2rem;
  }
  
  .department-card .btn {
    width: 100%;
    justify-self: center;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  
  .metric-value {
    font-size: 2rem;
  }
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--text-muted);
}

.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.mt-3 { margin-top: var(--spacing-xl); }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-xl); }