/* ==================== MODERN CSS VARIABLES ==================== */
:root {
    /* Color Palette */
    --primary-color: #034f84;
    --secondary-color: #6b5b95;
    --accent-color: #e07a5f;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-hero: linear-gradient(135deg, #0f2027 0%, #203a43 30%, #2c5364 60%, #5b21b6 100%);
    
    /* Neutral Colors */
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --bg-white: #ffffff;
    --bg-light: #f3f4f6;
    --bg-dark: #020617;
    --border-color: #d1d5db;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-heading: 'Arial', sans-serif;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.4);
    
    /* Transitions */
    --transition-fast: all 0.2s ease;
    --transition-base: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

/* ==================== RESET & BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background: var(--bg-light);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* ==================== HERO SECTION ==================== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(91, 33, 182, 0.4) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(44, 83, 100, 0.4) 0%, transparent 50%);
    animation: gradientShift 15s ease infinite;
}

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

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(2px);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    padding: var(--spacing-lg);
    animation: fadeInUp 1s ease;
}

.hero-subtitle-row {
    margin-top: var(--spacing-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: nowrap;
}

.hero-logo {
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.7);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(148, 163, 184, 0.4);
}

.hero-logo img {
    height: 132px;
    width: auto;
    display: block;
    object-fit: contain;
}

.hero-avatar {
    width: 150px;
    height: 150px;
    margin: var(--spacing-md) auto;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 0 30px rgba(192, 132, 252, 0.5), 0 0 60px rgba(56, 189, 248, 0.3);
    animation: fadeInScale 1.2s ease, float 3s ease-in-out infinite;
}

.hero-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

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

/* Glitch Effect */
.glitch {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 900;
    text-transform: uppercase;
    position: relative;
    letter-spacing: 3px;
    animation: glitch 3s infinite;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    left: 2px;
    text-shadow: -2px 0 #c084fc;
    clip: rect(24px, 550px, 90px, 0);
    animation: glitch-anim 2s infinite linear alternate-reverse;
}

.glitch::after {
    left: -2px;
    text-shadow: -2px 0 #38bdf8;
    clip: rect(85px, 550px, 140px, 0);
    animation: glitch-anim 3s infinite linear alternate-reverse;
}

@keyframes glitch {
    0% { text-shadow: 0 0 10px rgba(255, 255, 255, 0.5); }
    25% { text-shadow: -2px 0 #c084fc, 2px 0 #38bdf8; }
    50% { text-shadow: 0 0 10px rgba(255, 255, 255, 0.5); }
    75% { text-shadow: 2px 0 #c084fc, -2px 0 #38bdf8; }
    100% { text-shadow: 0 0 10px rgba(255, 255, 255, 0.5); }
}

@keyframes glitch-anim {
    0% { clip: rect(100px, 9999px, 150px, 0); }
    20% { clip: rect(30px, 9999px, 80px, 0); }
    40% { clip: rect(140px, 9999px, 200px, 0); }
    60% { clip: rect(10px, 9999px, 60px, 0); }
    80% { clip: rect(80px, 9999px, 130px, 0); }
    100% { clip: rect(50px, 9999px, 100px, 0); }
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    margin-top: var(--spacing-md);
    opacity: 0.9;
    animation: fadeIn 1.5s ease 0.5s both;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Stats Container */
.stats-container {
    display: flex;
    gap: var(--spacing-xl);
    margin-top: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.stat-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    padding: var(--spacing-md);
    min-width: 120px;
    animation: fadeInUp 1s ease calc(0.8s + var(--delay, 0s)) both;
    transition: var(--transition-base);
}

.stat-card:nth-child(1) { --delay: 0s; }
.stat-card:nth-child(2) { --delay: 0.2s; }
.stat-card:nth-child(3) { --delay: 0.4s; }

.stat-card:hover {
    transform: translateY(-10px) scale(1.05);
    box-shadow: var(--shadow-glow);
}

.stat-card i {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    line-height: 1;
    background: linear-gradient(45deg, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    margin-top: var(--spacing-xs);
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    animation: bounce 2s infinite;
}

.scroll-indicator i {
    font-size: 2rem;
    color: white;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-20px); }
    60% { transform: translateX(-50%) translateY(-10px); }
}

/* ==================== NAVIGATION ==================== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 900;
    color: #2c5364;
}

.search-container {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-container i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.search-input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.nav-links {
    display: flex;
    gap: var(--spacing-sm);
}

.nav-link {
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-fast);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

/* ==================== CONTAINER ==================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==================== PLATFORMS SECTION ==================== */
.platforms-section {
    padding: var(--spacing-2xl) 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xl);
    color: #2c5364;
}

.platforms-carousel {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeIn 1s ease;
}

.platform-logo {
    width: 100px;
    height: 100px;
    padding: var(--spacing-sm);
    border-radius: 20px;
    background: white;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid transparent;
    background-image: linear-gradient(white, white), var(--gradient-1);
    background-origin: border-box;
    background-clip: padding-box, border-box;
}

.platform-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition-base);
}

.platform-logo:hover {
    transform: translateY(-10px) scale(1.1);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.platform-logo:hover img {
    transform: rotate(-5deg);
}

/* ==================== MAIN CONTENT ==================== */
.main-content {
    padding: var(--spacing-2xl) 0;
    background: radial-gradient(circle at top, #ffffff 0%, var(--bg-light) 55%, #e5e7eb 100%);
}

/* Filter Chips */
.filter-chips {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
    justify-content: center;
    animation: slideInDown 0.8s ease;
}

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

.chip {
    padding: 10px 20px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    background: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 8px;
}

.chip:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.chip.active {
    background: var(--gradient-1);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-glow);
}

/* ==================== CERTIFICATE SECTIONS ==================== */
.certificate-section {
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: white;
    border-radius: 30px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
}

.certificate-section.hidden {
    display: none;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 3px solid var(--border-color);
}

.category-title {
    font-size: 2rem;
    color: #2c5364;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.cert-count {
    background: var(--gradient-1);
    color: white;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
}

.section-description {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: 1.1rem;
    text-align: center;
}

/* ==================== CERTIFICATES GRID ==================== */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.certificate-card {
    position: relative;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    animation: fadeInScale 0.6s ease both;
    border: 2px solid transparent;
    background-image: linear-gradient(white, white), var(--gradient-1);
    background-origin: border-box;
    background-clip: padding-box, border-box;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.certificate-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.cert-badge {
    position: absolute;
    bottom: 15px;
    right: 15px;
    background: rgba(255, 255, 255, 0.95);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent-color);
    box-shadow: var(--shadow-md);
    z-index: 2;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.cert-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
}

.cert-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.certificate-card:hover .cert-image img {
    transform: scale(1.1);
}

.cert-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(3, 79, 132, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-base);
}

.certificate-card:hover .cert-overlay {
    opacity: 1;
}

.cert-link {
    color: white;
    font-weight: 600;
    padding: 12px 24px;
    border: 2px solid white;
    border-radius: 50px;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 8px;
}

.cert-link:hover {
    background: white;
    color: var(--primary-color);
    transform: scale(1.1);
}

.cert-content {
    padding: var(--spacing-lg);
}

.cert-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.cert-org {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.cert-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
}

.tag {
    background: var(--gradient-1);
    color: white;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* ==================== FEATURED CERTIFICATE ==================== */
.featured-cert {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: var(--gradient-1);
    border-radius: 30px;
    color: white;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 1s ease;
}

.featured-cert.ai-themed {
    background: var(--gradient-3);
}

.featured-badge {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
}

.featured-cert h3 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.featured-org {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-md);
}

.featured-desc {
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 15px 30px;
    background: white;
    color: var(--primary-color);
    border-radius: 50px;
    font-weight: 700;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.featured-cert-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.featured-cert-image img {
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    transition: var(--transition-base);
}

.featured-cert:hover .featured-cert-image img {
    transform: scale(1.05) rotate(2deg);
}

/* ==================== SCHOLARSHIPS ==================== */
.scholarships-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.scholarship-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    border: 3px solid transparent;
}

.scholarship-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.scholarship-logo {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-md);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.scholarship-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.scholarship-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.scholarship-org {
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.scholarship-period {
    color: var(--accent-color);
    font-weight: 700;
    font-size: 0.9rem;
}

/* ==================== FOOTER ==================== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

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

.footer-section h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

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

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-5px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 1024px) {
    .featured-cert {
        grid-template-columns: 1fr;
    }
    
    .nav-container {
        flex-direction: column;
    }
    
    .search-container {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .stats-container {
        gap: var(--spacing-md);
    }
    
    .stat-card {
        min-width: 120px;
    }
    
    .nav-links {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        row-gap: var(--spacing-xs);
    }
    
    .certificates-grid {
        grid-template-columns: 1fr;
    }
    
    .category-title {
        font-size: 1.5rem;
    }
    
    .section-header {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .certificate-section {
        padding: var(--spacing-lg) var(--spacing-md);
        margin-bottom: var(--spacing-xl);
    }

    .featured-cert {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .hero {
        height: auto;
        padding: var(--spacing-2xl) 0;
    }

    .glitch {
        font-size: 2rem;
    }
    
    .filter-chips {
        gap: var(--spacing-xs);
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: var(--spacing-xs);
        -webkit-overflow-scrolling: touch;
    }
    
    .chip {
        padding: 8px 12px;
        font-size: 0.85rem;
        white-space: nowrap;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }
}

/* ==================== ANIMATIONS ON SCROLL ==================== */
[data-aos] {
    opacity: 0;
    transition-property: opacity, transform;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(50px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="zoom-in"] {
    transform: scale(0.8);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}

/* ==================== UTILITIES ==================== */
.text-gradient {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hidden {
    display: none !important;
}