/* ==========================================================================
   VANGUARD UNIVERSITY - MAIN STYLESHEET
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=Playfair+Display:ital,wght@0,500;0,600;0,700;0,800;1,600&display=swap');

:root {
  /* Color Palette */
  --primary: #0b192c;
  --primary-light: #1e3e62;
  --primary-dark: #060e1a;
  --accent: #d4af37;
  --accent-hover: #b8952b;
  --accent-light: #fef9c3;
  --secondary: #0284c7;
  --secondary-light: #e0f2fe;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  /* Neutral Colors */
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-alt: #f1f5f9;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #94a3b8;
  --border-color: #e2e8f0;
  --border-dark: #334155;

  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;

  /* Layout & Spacing */
  --max-width: 1280px;
  --header-height: 80px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows & Transitions */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(11,25,44,0.08);
  --shadow-lg: 0 12px 32px rgba(11,25,44,0.12);
  --shadow-xl: 0 20px 48px rgba(11,25,44,0.18);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Resets */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  color: var(--text-main);
  background-color: var(--bg-main);
  line-height: 1.6;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--primary);
  line-height: 1.25;
  font-weight: 700;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.2rem; }

.text-gold { color: var(--accent); }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }

/* Layout Components */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

.section-alt {
  background-color: var(--bg-alt);
}

.section-dark {
  background-color: var(--primary);
  color: #ffffff;
}

.section-dark h1,
.section-dark h2,
.section-dark h3 {
  color: #ffffff;
}

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

/* Header & Section Titles */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem auto;
}

.badge {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: var(--radius-full);
  background-color: var(--secondary-light);
  color: var(--secondary);
  margin-bottom: 0.75rem;
}

.badge-gold {
  background-color: rgba(212, 175, 55, 0.15);
  color: #926f12;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-top: 0.75rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: var(--primary-light);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

.btn-outline-light {
  background-color: transparent;
  border-color: rgba(255,255,255,0.4);
  color: #ffffff;
}

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

.btn-sm {
  padding: 0.5rem 1.2rem;
  font-size: 0.85rem;
}

/* Top Banner */
.top-bar {
  background-color: var(--primary-dark);
  color: var(--text-light);
  font-size: 0.85rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.top-bar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-contacts {
  display: flex;
  gap: 1.5rem;
}

.top-contacts a {
  color: var(--text-light);
}

.top-contacts a:hover {
  color: var(--accent);
}

.top-links {
  display: flex;
  gap: 1.25rem;
}

.top-links a {
  color: var(--text-light);
  font-weight: 500;
}

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

/* Navigation Header */
.main-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  height: var(--header-height);
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

.logo-crest {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.3rem;
  border: 2px solid var(--accent);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-main);
  position: relative;
  padding: 0.5rem 0;
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--primary);
  cursor: pointer;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, rgba(11,25,44,0.92), rgba(30,62,98,0.85)), url('https://images.unsplash.com/photo-1541339907198-e08756dedf3f?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  color: #ffffff;
  padding: 7rem 0 9rem 0;
  position: relative;
}

.hero-content {
  max-width: 750px;
}

.hero h1 {
  color: #ffffff;
  font-size: clamp(2.5rem, 5.5vw, 4rem);
  margin: 1rem 0 1.5rem 0;
  line-height: 1.15;
}

.hero p {
  color: var(--text-light);
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* Page Hero Banner */
.page-hero {
  background: linear-gradient(135deg, rgba(11,25,44,0.95), rgba(30,62,98,0.9)), url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center;
  color: #ffffff;
  padding: 5rem 0 4rem 0;
  text-align: center;
  position: relative;
}

.page-hero h1 {
  color: #ffffff;
  margin-bottom: 1rem;
}

.page-hero p {
  color: var(--text-light);
  font-size: 1.2rem;
  max-width: 650px;
  margin: 0 auto 1.5rem auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--accent-light);
}

.breadcrumb a {
  color: #ffffff;
  opacity: 0.8;
}

.breadcrumb a:hover {
  opacity: 1;
  color: var(--accent);
}

/* Cards & Grid Systems */
.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background-color: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(212, 175, 55, 0.4);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-icon {
  width: 54px;
  height: 54px;
  background: var(--secondary-light);
  color: var(--secondary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.card-icon-gold {
  background: rgba(212, 175, 55, 0.15);
  color: #926f12;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.card-title {
  margin-bottom: 0.75rem;
}

.card-footer {
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Feature Counters Bar */
.stats-bar {
  background-color: var(--primary);
  color: #ffffff;
  padding: 3rem 0;
  margin-top: -3.5rem;
  position: relative;
  z-index: 10;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(212, 175, 55, 0.3);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-item h3 {
  font-size: 2.8rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.stat-item p {
  color: var(--text-light);
  font-size: 0.95rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Tabs & Filters */
.filter-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* Search Bar */
.search-box {
  position: relative;
  max-width: 500px;
  margin: 0 auto 2rem auto;
}

.search-input {
  width: 100%;
  padding: 0.9rem 1.25rem 0.9rem 3rem;
  font-size: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  outline: none;
  transition: var(--transition);
  background-color: var(--bg-card);
}

.search-input:focus {
  border-color: var(--secondary);
  box-shadow: 0 0 0 4px var(--secondary-light);
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.2rem;
}

/* Accordion */
.accordion {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 850px;
  margin: 0 auto;
}

.accordion-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.accordion-header {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  cursor: pointer;
  text-align: left;
}

.accordion-header:hover {
  background-color: var(--bg-alt);
}

.accordion-icon {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1.5rem;
  color: var(--text-muted);
}

.accordion-item.active .accordion-content {
  padding: 0 1.5rem 1.5rem 1.5rem;
  max-height: 400px;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 850px;
  margin: 0 auto;
  padding: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 3px;
  background-color: var(--border-color);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
  width: 50%;
  padding: 0 2rem;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
  text-align: left;
}

.timeline-dot {
  position: absolute;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--accent);
  border: 4px solid var(--bg-card);
  box-shadow: var(--shadow-sm);
  z-index: 2;
}

.timeline-item:nth-child(odd) .timeline-dot { right: -10px; }
.timeline-item:nth-child(even) .timeline-dot { left: -10px; }

.timeline-card {
  background-color: var(--bg-card);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.timeline-year {
  font-weight: 800;
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

/* Calculator Card Styling */
.calculator-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  max-width: 800px;
  margin: 0 auto;
}

.calc-result-box {
  background-color: var(--primary);
  color: #ffffff;
  padding: 2rem;
  border-radius: var(--radius-md);
  text-align: center;
  margin-top: 2rem;
}

.calc-price {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent);
  margin: 0.5rem 0;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(11, 25, 44, 0.75);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-box {
  background-color: var(--bg-card);
  width: 90%;
  max-width: 600px;
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-xl);
  position: relative;
  transform: translateY(20px);
  transition: var(--transition);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-overlay.active .modal-box {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close:hover {
  background-color: var(--bg-alt);
  color: var(--primary);
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
  text-align: left;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  color: var(--primary);
}

.form-control {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
  background-color: var(--bg-card);
}

.form-control:focus {
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px var(--secondary-light);
}

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

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

/* Global Footer */
.main-footer {
  background-color: var(--primary-dark);
  color: var(--text-light);
  margin-top: auto;
  padding-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand p {
  margin: 1rem 0 1.5rem 0;
  max-width: 320px;
  line-height: 1.7;
}

.footer-brand .logo {
  color: #ffffff;
}

.social-links {
  display: flex;
  gap: 0.75rem;
}

.social-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: rgba(255,255,255,0.06);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.social-icon:hover {
  background-color: var(--accent);
  color: var(--primary-dark);
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background-color: var(--accent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-light);
  font-size: 0.95rem;
}

.footer-links a:hover {
  color: #ffffff;
  padding-left: 5px;
}

.footer-bottom {
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .top-bar { display: none; }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: #ffffff;
    flex-direction: column;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    clip-path: circle(0% at 100% 0);
    transition: clip-path 0.4s ease-in-out;
  }

  .nav-menu.open {
    clip-path: circle(140% at 100% 0);
  }

  .mobile-toggle { display: block; }
  .nav-cta { display: none; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  
  .timeline::before { left: 20px; }
  .timeline-item { width: 100%; padding-left: 3rem; padding-right: 0; text-align: left !important; }
  .timeline-item:nth-child(even) { left: 0; }
  .timeline-dot { left: 10px !important; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--accent);
  color: var(--primary-dark);
  border: none;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
  background-color: #ffffff;
}