:root {
  --primary: #6366f1; /* Indigo 500 */
  --primary-dark: #4f46e5; /* Indigo 600 */
  --secondary: #0f172a; /* Slate 900 */
  --accent: #10b981; /* Emerald 500 */
  --accent-dark: #059669; /* Emerald 600 */
  --text-main: #1e293b; /* Slate 800 */
  --text-muted: #64748b; /* Slate 500 */
  --bg-main: #ffffff;
  --bg-subtle: #f8fafc; /* Slate 50 */
  --white: #ffffff;
  --border: #e2e8f0; /* Slate 200 */
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(255, 255, 255, 0.2);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', sans-serif;
  --container-width: 1200px;
  --header-height: 80px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --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);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  padding-top: var(--header-height);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--secondary);
}

/* Utilities */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-family: var(--font-display);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.23);
  filter: brightness(1.1);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-subtle);
  color: var(--secondary);
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-family: var(--font-display);
  border: 1px solid var(--border);
  cursor: pointer;
}

.btn-secondary:hover {
  background: var(--border);
  transform: translateY(-2px);
}

/* Glass Header */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 2000;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
}

.navbar {
  width: 100%;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Hide legacy bars in CSS if they are not removed from HTML yet */
.top-bar, .search-bar {
  display: none !important;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--secondary);
  letter-spacing: -0.5px;
}

.logo-text span {
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-main);
  padding: 0.5rem 0;
  opacity: 0.8;
}

.nav-links a.active {
  color: var(--primary);
  opacity: 1;
}

.nav-links a:hover {
  color: var(--primary);
  opacity: 1;
}

.nav-actions .btn-phone {
  background: var(--secondary);
  color: white;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.nav-actions .btn-phone:hover {
  background: var(--primary);
  transform: scale(1.05);
}

/* Search Bar */
.search-bar {
  background-color: #f0f2f5;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.search-input-wrapper {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  display: flex;
}

.search-input-wrapper input {
  width: 100%;
  padding: 0.6rem 1rem;
  padding-right: 3rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: white;
  font-family: var(--font-sans);
}

.search-input-wrapper button {
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  padding: 0 1rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 0 4px 4px 0;
  cursor: pointer;
}

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

/* Hero Section */
.hero {
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  text-align: center;
  background: linear-gradient(rgba(15, 23, 42, 0.7), rgba(15, 23, 42, 0.7)), url('academic_hero_bg_1776873886096.png') no-repeat center center/cover;
  padding: 4rem 0;
  margin-top: calc(-1 * var(--header-height));
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 10;
  color: white;
  animation: fadeIn 1s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 1.5rem;
  color: white;
  letter-spacing: -1px;
}

.hero h1 span {
  background: linear-gradient(135deg, #a5b4fc, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Sections */
.section {
  padding: 6rem 0;
}

.section-title {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 3rem;
  position: relative;
  padding-bottom: 1.5rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(to right, var(--primary), var(--accent));
  border-radius: 2px;
}

.section-title span {
  color: var(--primary);
}

/* Services / Features Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(to right, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity 0.3s;
}

.card:hover::before {
  opacity: 1;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.card-icon {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: center;
}

.card h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--secondary);
}

.card p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.card-link {
  color: var(--primary);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.card-link:hover {
  gap: 0.75rem;
}

/* Footer */
.footer {
  background: #f8fafc;
  border-top: 1px solid var(--border);
  padding: 5rem 0 2rem;
  color: var(--text-main);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-col h4 {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  color: var(--secondary);
  position: relative;
  padding-bottom: 0.75rem;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: var(--primary);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.8rem;
}

.footer-col ul a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-col ul a:hover {
  color: var(--primary);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Animations */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background: var(--bg-main);
    padding: 2rem;
    border-bottom: 1px solid var(--glass-border);
  }

  .nav-links.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero p {
    font-size: 1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
}
/* Cookie Banner */
#cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: white;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    z-index: 3000;
    padding: 1.5rem 0;
}

.cookie-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.cookie-content p {
    font-size: 0.9rem;
    color: var(--text-main);
    margin: 0;
}

.cookie-buttons {
    display: flex;
    gap: 1rem;
    flex-shrink: 0;
}

.btn-cookie-accept {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-cookie-reject {
    background: var(--bg-subtle);
    color: var(--text-muted);
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-cookie-accept:hover {
    background: var(--primary-dark);
}

.btn-cookie-reject:hover {
    background: var(--border);
}

@media (max-width: 768px) {
    .cookie-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    .footer-bottom {
        padding: 2rem 0;
    }
    .footer-bottom p {
        margin: 0 0 1rem;
    }
    .footer-legal {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }
}