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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #334155;
    scroll-behavior: smooth;
}

/* Color System */
:root {
    --primary: #0a9768ff;
    --primary-light: #0a9768ff;
    --primary-dark: #0a9768ff;
    --secondary: #0a9768ff;
    --accent: #10b981;
    --success: #059669;
    --warning: #f59e0b;
    --danger: #dc2626;
    --info: #0891b2;
    --light: #f8fafc;
    --dark: #1e293b;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 600;
}

.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
    line-height: 1.1;
    font-weight: 700;
}

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

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

.fade-in-right {
    animation: fadeInRight 0.8s ease-out;
}

.pulse {
    animation: pulse 2s infinite;
}

/* Navigation */
.navbar {
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.navbar-scrolled {
    background-color: rgba(255, 255, 255, 0.95) !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-link {
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero-section {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://images.pexels.com/photos/1595391/pexels-photo-1595391.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1') center/cover no-repeat;
    opacity: 0.1;
    z-index: 0;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.8) 0%, rgba(79, 70, 229, 0.8) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
}

.text-gradient {
    background: linear-gradient(135deg, #00f7ff, #00f6ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-white-75 {
    color: rgba(255, 255, 255, 0.75);
}

.hero-actions .btn {
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.hero-actions .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Floating Card */
.floating-card {
    position: relative;
    animation: float 3s ease-in-out infinite;
}

.icon-box {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.stat-item {
    padding: 15px;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-down {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    animation: pulse 2s infinite;
}

.scroll-down:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px);
}

/* Program Overview */
.program-overview-card {
    border-radius: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.program-overview-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.stat-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

/* Specialty Cards */
.specialty-card {
    cursor: pointer;
    transition: all 0.3s ease;
}

.specialty-card:hover {
    transform: translateY(-8px);
}

.specialty-card:hover .card {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.specialty-icon {
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto;
}

/* Prerequisites Section */
.prerequisites-container {
    max-width: 100%;
}

.prerequisite-section {
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.prerequisite-section:hover {
    transform: translateY(-3px);
}

.section-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 15px 15px 0 0;
}

.course-item {
    padding: 15px;
    border-radius: 10px;
    background: var(--gray-50);
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.course-item:hover {
    background: var(--primary-light);
    color: white;
    transform: translateX(5px);
}

.course-item:hover .badge {
    background-color: rgba(255, 255, 255, 0.2) !important;
}

.prerequisite-item {
    padding: 20px;
    border-radius: 12px;
    background: var(--gray-50);
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.prerequisite-item:hover {
    background: white;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    transform: translateY(-3px);
}

.prereq-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.credits-summary {
    margin-top: 30px;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-marker {
    position: absolute;
    left: -30px;
    top: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 2;
}

.timeline-content {
    margin-left: 30px;
}

.timeline-item .card {
    border-radius: 15px;
    transition: all 0.3s ease;
}

.timeline-item:hover .card {
    transform: translateX(10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

/* Contact Section */
.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.contact-item {
    transition: transform 0.3s ease;
}

.contact-item:hover {
    transform: translateX(5px);
}

/* Forms */
.form-control, .form-select {
    border-radius: 10px;
    border: 2px solid var(--gray-200);
    padding: 12px 16px;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Buttons */
.btn {
    border-radius: 10px;
    font-weight: 600;
    padding: 12px 24px;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

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

.btn-outline-primary:hover {
    background: var(--primary);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

/* Modals */
.modal-content {
    border-radius: 20px;
    border: none;
    overflow: hidden;
}

.modal-header {
    border-bottom: 1px solid var(--gray-200);
    padding: 25px 30px;
}

.modal-body {
    padding: 30px;
}

.modal-footer {
    border-top: 1px solid var(--gray-200);
    padding: 25px 30px;
}

/* Checklist */
.checklist-item {
    padding: 20px;
    border-radius: 12px;
    background: var(--gray-50);
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.checklist-item:hover {
    background: white;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--dark), var(--gray-800));
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

/* Utilities */
.bg-primary-subtle {
    background-color: rgba(37, 99, 235, 0.1);
}

.bg-success-subtle {
    background-color: rgba(5, 150, 105, 0.1);
}

.bg-warning-subtle {
    background-color: rgba(245, 158, 11, 0.1);
}

.bg-danger-subtle {
    background-color: rgba(220, 38, 38, 0.1);
}

.bg-info-subtle {
    background-color: rgba(8, 145, 178, 0.1);
}

.bg-secondary-subtle {
    background-color: rgba(107, 114, 128, 0.1);
}

.text-primary {
    color: var(--primary) !important;
}

.text-success {
    color: var(--success) !important;
}

.text-warning {
    color: var(--warning) !important;
}

.text-danger {
    color: var(--danger) !important;
}

.text-info {
    color: var(--info) !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        text-align: center;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
    
    .hero-actions .btn {
        margin-bottom: 10px;
        width: 100%;
    }
    
    .timeline {
        padding-left: 20px;
    }
    
    .timeline::before {
        left: 10px;
    }
    
    .timeline-marker {
        left: -10px;
        width: 20px;
        height: 20px;
    }
    
    .timeline-content {
        margin-left: 20px;
    }
    
    .floating-card {
        margin-top: 50px;
    }
    
    .specialty-icon {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .modal-body, .modal-header, .modal-footer {
        padding: 20px;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .display-4 {
        font-size: 2rem;
    }
    
    .lead {
        font-size: 1rem;
    }
    
    .card-body {
        padding: 20px;
    }
    
    .timeline-item:hover .card {
        transform: none;
    }
    
    .specialty-card:hover {
        transform: none;
    }
    
    .course-item:hover {
        transform: none;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Smooth Scrolling Enhancement */
html {
    scroll-behavior: smooth;
}

/* Focus Styles for Accessibility */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .navbar,
    .hero-section,
    .modal,
    footer {
        display: none;
    }
    
    .container {
        max-width: 100%;
    }
    
    .card {
        break-inside: avoid;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .btn-primary {
        background: #000;
        color: #fff;
        border: 2px solid #fff;
    }
    
    .text-primary {
        color: #000 !important;
    }
    
    .card {
        border: 2px solid #000;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}