/* ===== ROOT VARIABLES ===== */
:root {
  /* Primary Green Colors */
  --primary-green: #22c55e;
  --primary-green-dark: #16a34a;
  --primary-green-light: #4ade80;
  --primary-gradient: linear-gradient(135deg, #22c55e 0%, #10b981 100%);
  
  /* Secondary Gray Colors */
  --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;
  
  /* Accent Gradients */
  --secondary-gradient: linear-gradient(135deg, #6b7280 0%, #4b5563 100%);
  --success-gradient: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  --warning-gradient: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  
  /* Background Colors */
  --dark-bg: #1f2937;
  --light-bg: #f9fafb;
  
  /* Other Variables */
  --border-radius: 0.75rem;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== GLOBAL STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--gray-800);
  background: var(--light-bg);
  line-height: 1.5;
  min-height: 100vh;
  font-size: 11.5px;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  color: var(--gray-900);
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

h1 { font-size: clamp(1rem, 2.8vw, 1.6rem); }
h2 { font-size: clamp(0.95rem, 2vw, 1.3rem); }
h3 { font-size: clamp(0.85rem, 1.6vw, 1.1rem); }

p {
  margin-bottom: 0.75rem;
  color: var(--gray-600);
  font-size: 0.7rem;
}

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

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

/* ===== BACKGROUNDS ===== */
.bg-primary { 
  background: var(--primary-gradient) !important;
}

.bg-secondary {
  background: var(--secondary-gradient) !important;
}

.bg-gradient-success {
  background: var(--success-gradient) !important;
}

/* ===== CARDS & CONTAINERS ===== */
.card {
  border: 0;
  border-radius: var(--border-radius);
  transition: var(--transition);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
  overflow: hidden;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(34, 197, 94, 0.2);
}

.card-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: 0;
  padding: 1.5rem;
  font-weight: 600;
}

.card-body {
  padding: 1.25rem;
}

.card-footer {
  background: rgba(0, 0, 0, 0.02);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

/* ===== PROGRAM CARDS ===== */
.program-card {
  transition: var(--transition);
}

.program-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(34, 197, 94, 0.2);
}

.program-card-image-wrapper {
  width: 100%;
  height: 200px;
  border-radius: 0.75rem;
  overflow: hidden;
  margin-bottom: 1rem;
  background: var(--gray-100);
  position: relative;
}

.program-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.program-card-badges-top {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  align-items: flex-end;
}

.program-card-cohort {
  position: absolute;
  bottom: 0.75rem;
  left: 0.75rem;
  font-size: 0.65rem;
  font-weight: 700;
  box-shadow: 0 6px 18px rgba(2, 6, 23, 0.18);
}

/* ===== BUTTONS ===== */
.btn {
  padding: 0.45rem 1.1rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 0.7rem;
  letter-spacing: 0.3px;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(34, 197, 94, 0.3);
  color: white;
}

.btn-secondary {
  background: var(--secondary-gradient);
  color: white;
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(107, 114, 128, 0.3);
  color: white;
}

.btn-success {
  background: var(--success-gradient);
  color: white;
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(34, 197, 94, 0.3);
  color: white;
}

.btn-outline-primary {
  border: 2px solid var(--primary-green);
  color: var(--primary-green);
}

.btn-outline-primary:hover {
  background: var(--primary-green);
  color: white;
}

.btn-sm {
  padding: 0.35rem 0.9rem;
  font-size: 0.68rem;
}

/* ===== BADGES ===== */
.badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.35rem 0.7rem;
  border-radius: 50px;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: var(--primary-gradient);
  color: white;
}

.badge-success {
  background: var(--success-gradient);
  color: white;
}

.badge-warning {
  background: var(--warning-gradient);
  color: white;
}

/* ===== FORMS ===== */
.form-control, .form-select {
  border: 2px solid var(--gray-200);
  border-radius: var(--border-radius);
  padding: 0.65rem 0.9rem;
  font-size: 0.8rem;
  transition: var(--transition);
  background-color: white;
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-green);
  box-shadow: 0 0 0 0.2rem rgba(34, 197, 94, 0.25);
  color: var(--gray-800);
}

.form-control::placeholder {
  color: var(--gray-400);
  opacity: 1;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.5rem;
  display: block;
}

.input-group-text {
  background: transparent;
  border: 2px solid var(--gray-200);
  color: var(--primary-green);
}

/* ===== NAVBAR ===== */
.navbar {
  background: white;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar-brand {
  font-weight: 800;
  font-size: 1.5rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-link {
  font-weight: 600;
  color: var(--gray-600) !important;
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover {
  color: var(--primary-green) !important;
}

/* ===== SECTIONS ===== */
section {
  scroll-margin-top: 80px;
  padding: 4rem 0;
}

section:nth-child(even) {
  background: var(--light-bg);
}

/* ===== HERO SECTION ===== */
.hero {
  background: var(--primary-gradient);
  color: white;
  padding: 3rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1), transparent),
              radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  color: white;
  margin-bottom: 0.75rem;
}

.hero p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 0.9375rem;
  margin-bottom: 1rem;
}

/* ===== ALERTS ===== */
.alert {
  border: 0;
  border-radius: var(--border-radius);
  padding: 1.25rem;
  border-left: 4px solid;
  animation: slideIn 0.3s ease;
}

.alert-success {
  background: #f0fdf4;
  color: #166534;
  border-color: #22c55e;
}

.alert-danger {
  background: #fef2f2;
  color: #991b1b;
  border-color: #ef4444;
}

.alert-warning {
  background: #fffbeb;
  color: #92400e;
  border-color: #fbbf24;
}

.alert-info {
  background: #f0f9ff;
  color: #0c2340;
  border-color: #0ea5e9;
}

/* ===== ANIMATIONS ===== */
@keyframes slideIn {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    transform: translateY(30px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-fade-in {
  animation: fadeInUp 0.6s ease;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

/* ===== PAGINATION ===== */
.pagination {
  gap: 0.5rem;
}

.page-link {
  border: 2px solid var(--gray-200);
  color: var(--primary-green);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.page-link:hover {
  background: var(--primary-gradient);
  border-color: var(--primary-green);
  color: white;
}

.page-item.active .page-link {
  background: var(--primary-gradient);
  border-color: var(--primary-green);
}

/* ===== RESPONSIVE DESIGN ===== */
/* Laptop screens (1366px and below) */
@media (max-width: 1440px) {
  body {
    font-size: 13px;
  }
  
  .container {
    max-width: 1140px;
  }
  
  section {
    padding: 2rem 0;
  }
  
  .hero {
    padding: 3.5rem 0;
  }
  
  .card-body {
    padding: 1rem;
  }
}

@media (max-width: 1024px) {
  body {
    font-size: 12px;
  }
  
  .container {
    max-width: 920px;
  }
  
  section {
    padding: 1.75rem 0;
  }
  
  .hero {
    padding: 2.5rem 0;
  }
  
  .card {
    margin-bottom: 1rem;
  }
  
  .card-body {
    padding: 0.875rem;
  }
}

@media (max-width: 768px) {
  :root {
    --border-radius: 0.5rem;
  }

  h1 { font-size: 1.375rem; }
  h2 { font-size: 1.125rem; }
  
  body {
    font-size: 12px;
  }

  .btn {
    padding: 0.45rem 0.875rem;
    font-size: 0.8125rem;
  }

  section {
    padding: 1.5rem 0;
  }

  .hero {
    padding: 2.5rem 0;
  }

  .card {
    margin-bottom: 1.25rem;
  }

  .navbar {
    padding: 0.625rem 0;
  }

  .nav-link {
    padding: 0.45rem 0.625rem !important;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.1rem; }

  .btn {
    width: 100%;
    padding: 0.75rem 1rem;
  }

  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  section {
    padding: 1.5rem 0;
  }
}