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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background-color: #DC2626;
    color: white;
}

.btn-primary:hover {
    background-color: #B91C1C;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: #DC2626;
    border: 2px solid #DC2626;
}

.btn-secondary:hover {
    background-color: #DC2626;
    color: white;
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid #E5E7EB;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: #DC2626;
}

.nav-brand i {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #6B7280;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #DC2626;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #FEF2F2 0%, #FFFFFF 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-title {
    font-size: 3rem;
    color: #1F2937;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: #6B7280;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Section Titles */
.section-title {
    text-align: center;
    color: #1F2937;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: #6B7280;
    font-size: 1.125rem;
    margin-bottom: 3rem;
}

/* Program Section */
.program {
    padding: 80px 0;
    background-color: #F9FAFB;
}

.program-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
}

.program-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.program-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

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

.program-content {
    padding: 2rem;
}

.program-content h3 {
    color: #DC2626;
    margin-bottom: 1rem;
}

.program-content ul {
    list-style: none;
}

.program-content li {
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1.5rem;
}

.program-content li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10B981;
    font-weight: bold;
}

/* Keunggulan Section */
.keunggulan {
    padding: 80px 0;
}

.keunggulan-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.keunggulan-card {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.keunggulan-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.keunggulan-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #DC2626, #F87171);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.keunggulan-icon i {
    font-size: 2rem;
    color: white;
}

.keunggulan-card h3 {
    color: #1F2937;
    margin-bottom: 1rem;
}

.keunggulan-card p {
    color: #6B7280;
    line-height: 1.6;
}

/* Gallery Section */
.gallery {
    padding: 80px 0;
    background-color: #F9FAFB;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
}

/* Registration Section */
.registration {
    padding: 80px 0;
    background: linear-gradient(135deg, #DC2626, #B91C1C);
}

.registration-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.registration-info h2 {
    color: white;
    margin-bottom: 1.5rem;
}

.registration-info p {
    color: #FEE2E2;
    font-size: 1.125rem;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: white;
}

.info-item i {
    color: #10B981;
    font-size: 1.25rem;
}

.registration-form-container {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.registration-form h3 {
    color: #1F2937;
    margin-bottom: 2rem;
    text-align: center;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #374151;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #E5E7EB;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #DC2626;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.error-message {
    color: #DC2626;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
}

/* Footer */
.footer {
    background-color: #1F2937;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    color: #DC2626;
    margin-bottom: 1rem;
}

.footer-section p {
    color: #D1D5DB;
    margin-bottom: 0.5rem;
}

.footer-section i {
    margin-right: 0.5rem;
    color: #DC2626;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9CA3AF;
}

/* Floating WhatsApp Button */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
}

.whatsapp-float a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: #25D366;
    color: white;
    border-radius: 50%;
    text-decoration: none;
    font-size: 1.5rem;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
    transition: all 0.3s ease;
    animation: pulse 2s infinite;
}

.whatsapp-float a:hover {
    background: #20B358;
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(37, 211, 102, 0.4);
}

@keyframes pulse {
    0% {
        box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
    }
    50% {
        box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3), 0 0 0 10px rgba(37, 211, 102, 0.1);
    }
    100% {
        box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
    }
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
}

.loading-spinner i {
    font-size: 2rem;
    color: #DC2626;
    margin-bottom: 1rem;
}

.loading-spinner p {
    color: #6B7280;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content,
    .registration-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .program-grid {
        grid-template-columns: 1fr;
    }
    
    .program-card {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0;
    }
    
    .program-image {
        order: 1;
    }
    
    .program-content {
        order: 2;
    }
}

@media (max-width: 768px) {
    .nav {
        padding: 1rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-content {
        padding: 0 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .program-card {
        grid-template-columns: 1fr;
    }
    
    .program-image {
        order: 1;
    }
    
    .program-content {
        order: 2;
    }
    
    .registration-form-container {
        padding: 1.5rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .whatsapp-float {
        bottom: 20px;
        right: 20px;
    }
    
    .whatsapp-float a {
        width: 55px;
        height: 55px;
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .registration-form-container {
        padding: 1rem;
    }
    
    .keunggulan-grid,
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Form Validation Styles */
.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: #DC2626;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-group.success input,
.form-group.success select,
.form-group.success textarea {
    border-color: #10B981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

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

/* Focus Styles for Accessibility */
.btn:focus,
input:focus,
select:focus,
textarea:focus,
.nav-link:focus {
    outline: 2px solid #DC2626;
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header,
    .whatsapp-float,
    .loading-overlay {
        display: none !important;
    }
}