@layer reset, theme, layout, components, utilities;

@layer reset {
    *, *::before, *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        text-size-adjust: 100%;
    }
    body {
        min-height: 100vh;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        background-color: var(--bg-primary);
        color: var(--text-primary);
        font-family: var(--font-primary);
        overflow-x: hidden;
    }
    img {
        display: block;
        max-width: 100%;
        height: auto;
    }
    a {
        text-decoration: none;
        color: inherit;
    }
    ul, ol {
        list-style: none;
    }
}

@layer theme {
    :root {
        --bg-primary: #0a0a0c;
        --bg-secondary: #121215;
        --bg-tertiary: #1a1a1f;
        
        --accent-blue: #399be9;
        --accent-blue-hover: #4ea8f2;
        --accent-blue-glow: rgba(57, 155, 233, 0.15);
        
        --text-primary: #f8f9fa;
        --text-secondary: #a1a1aa;
        --text-muted: #71717a;
        
        --font-primary: 'Lexend Deca', sans-serif;
        
        --border-soft: rgba(255, 255, 255, 0.08);
        --radius-sm: 8px;
        --radius-md: 12px;
        --radius-lg: 24px;
        
        --space-sm: 1rem;
        --space-md: 2rem;
        --space-lg: 4rem;
        --space-xl: 6rem;
        
        --container-max: 1200px; 
        --nav-height: 72px;
        
        --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
        --duration-normal: 0.3s;
    }
}

@layer layout {
    .container {
        width: 100%;
        max-width: var(--container-max);
        margin-inline: auto;
        padding-inline: 1.5rem;
    }
    
    main {
        display: flex;
        flex-direction: column;
        gap: var(--space-xl);
        padding-bottom: var(--space-xl);
    }
}

@layer components {
    .navbar {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: var(--nav-height);
        background: rgba(10, 10, 12, 0.8);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border-soft);
        z-index: 100;
        display: flex;
        align-items: center;
        transition: background var(--duration-normal) var(--ease-smooth);
    }
    
    .nav-container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
        max-width: var(--container-max);
        margin-inline: auto;
        padding-inline: 1.5rem;
    }
    
    .nav-logo {
        height: 36px;
        object-fit: contain;
    }
    
    .nav-links {
        display: flex;
        gap: 2rem;
        align-items: center;
    }
    
    .nav-link {
        font-weight: 500;
        font-size: 0.9rem;
        color: var(--text-secondary);
        transition: color var(--duration-normal) var(--ease-smooth);
    }
    
    .nav-link:hover {
        color: var(--text-primary);
    }
    
    .nav-accent {
        color: var(--accent-blue);
    }
    
    .nav-accent:hover {
        color: var(--accent-blue-hover);
    }

    .hero {
        position: relative;
        min-height: 90vh;
        display: flex;
        align-items: center;
        padding-top: var(--nav-height);
    }
    
    .hero-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        align-items: center;
    }
    
    @media (min-width: 900px) {
        .hero-grid {
            grid-template-columns: 1.2fr 1fr;
        }
    }
    
    .hero-content {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
        max-width: 600px;
    }
    
    .title {
        font-weight: 600;
        font-size: clamp(2.5rem, 5vw, 4.5rem);
        line-height: 1.1;
        letter-spacing: -0.02em;
        color: var(--text-primary);
    }
    
    .subtitle {
        font-weight: 400;
        font-size: clamp(1.05rem, 1.5vw, 1.2rem);
        color: var(--text-secondary);
        line-height: 1.6;
    }
    
    .hero-actions {
        display: flex;
        gap: 1rem;
        margin-top: 1rem;
        flex-wrap: wrap;
    }
    
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 0.875rem 1.75rem;
        font-weight: 500;
        font-size: 0.95rem;
        border-radius: var(--radius-md);
        transition: all var(--duration-normal) var(--ease-smooth);
        cursor: pointer;
    }
    
    .btn-primary {
        background-color: var(--accent-blue);
        color: #000;
        border: 1px solid var(--accent-blue);
    }
    
    .btn-primary:hover {
        background-color: var(--accent-blue-hover);
        border-color: var(--accent-blue-hover);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px var(--accent-blue-glow);
    }
    
    .btn-secondary {
        background-color: transparent;
        color: var(--text-primary);
        border: 1px solid var(--border-soft);
    }
    
    .btn-secondary:hover {
        background-color: var(--bg-secondary);
        border-color: rgba(255, 255, 255, 0.15);
        transform: translateY(-2px);
    }
    
    .hero-visual {
        position: relative;
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        perspective: 1200px;
    }
    
    .hero-image-wrapper {
        position: relative;
        width: 130%;
        max-width: 800px;
        aspect-ratio: 21 / 9;
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--border-soft);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
        transform: rotateY(-15deg) rotateX(5deg);
        animation: float-3d 6s ease-in-out infinite;
    }
    
    .hero-main-img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    
    .hero-image-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(162, 210, 255, 0.1) 0%, transparent 100%);
        pointer-events: none;
    }

    .section-header {
        margin-bottom: var(--space-md);
        text-align: center;
    }
    
    .section-title {
        font-weight: 600;
        font-size: clamp(2rem, 4vw, 2.5rem);
        margin-bottom: 0.5rem;
        letter-spacing: -0.01em;
    }
    
    .section-desc {
        color: var(--text-secondary);
        font-size: 1.1rem;
        line-height: 1.6;
        max-width: 600px;
        margin-inline: auto;
    }

    .about-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--space-xl);
        align-items: center;
        margin-top: var(--space-md);
    }
    
    @media (min-width: 900px) {
        .about-grid {
            grid-template-columns: 1fr 1fr;
        }
    }
    
    .about-visual {
        position: relative;
        width: 100%;
        aspect-ratio: 1 / 1;
        max-height: 500px;
    }
    
    .collage {
        position: relative;
        width: 100%;
        height: 100%;
    }
    
    .collage-img {
        position: absolute;
        border-radius: var(--radius-md);
        border: 1px solid var(--border-soft);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
        object-fit: cover;
        transition: transform var(--duration-normal) var(--ease-smooth);
    }
    
    .collage-img-1 {
        top: 0;
        left: 0;
        width: 70%;
        aspect-ratio: 4 / 3;
        z-index: 1;
    }
    
    .collage-img-2 {
        bottom: 0;
        right: 0;
        width: 65%;
        aspect-ratio: 4 / 3;
        z-index: 2;
    }
    
    .collage:hover .collage-img-1 {
        transform: translate(-5px, -5px) scale(1.02);
    }
    
    .collage:hover .collage-img-2 {
        transform: translate(5px, 5px) scale(1.02);
    }
    
    .about-content {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .about-text {
        display: flex;
        flex-direction: column;
        gap: 1rem;
        color: var(--text-secondary);
        font-size: 1.05rem;
        line-height: 1.7;
    }
    
    .about-stats {
        display: flex;
        align-items: center;
        gap: 1.5rem;
        margin-top: 1rem;
        padding-top: 1.5rem;
        border-top: 1px solid var(--border-soft);
    }
    
    .stat-item {
        display: flex;
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .stat-number {
        font-size: 1.75rem;
        font-weight: 600;
        color: var(--accent-blue);
        line-height: 1;
    }
    
    .stat-label {
        font-size: 0.85rem;
        color: var(--text-muted);
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }
    
    .stat-separator {
        width: 1px;
        height: 30px;
        background-color: var(--border-soft);
    }

    .dept-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: var(--space-md);
    }
    
    @media (min-width: 768px) {
        .dept-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    
    .dept-card {
        background: var(--bg-secondary);
        border: 1px solid var(--border-soft);
        border-radius: var(--radius-md);
        overflow: hidden;
        display: flex;
        flex-direction: column;
        transition: transform var(--duration-normal) var(--ease-smooth),
                    border-color var(--duration-normal) var(--ease-smooth),
                    box-shadow var(--duration-normal) var(--ease-smooth);
    }
    
    .dept-card:hover {
        transform: translateY(-4px);
        border-color: rgba(162, 210, 255, 0.3);
        box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
    }
    
    .card-image-wrapper {
        width: 100%;
        aspect-ratio: 16 / 9;
        overflow: hidden;
        border-bottom: 1px solid var(--border-soft);
    }
    
    .card-image {
        width: 100%;
        height: 100%;
        transform: scale(1.1);
        object-fit: cover;
        transition: transform 0.5s var(--ease-smooth);
    }
    
    .dept-card:hover .card-image {
        transform: scale(1.15);
    }
    
    .card-content {
        padding: 1.5rem;
        display: flex;
        flex-direction: column;
        gap: 0.75rem;
        flex-grow: 1;
    }
    
    .card-title {
        font-weight: 600;
        font-size: 1.25rem;
        color: var(--text-primary);
    }
    
    .card-text {
        font-size: 0.95rem;
        line-height: 1.6;
        color: var(--text-secondary);
    }
    
    .footer {
        background: var(--bg-secondary);
        border-top: 1px solid var(--border-soft);
        padding-block: 3rem 2rem;
    }
    
    .footer-content {
        display: flex;
        flex-direction: column;
        gap: 2rem;
    }
    
    .footer-top {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 1rem;
    }
    
    .footer-logo {
        height: 32px;
        opacity: 0.8;
    }
    
    .footer-text {
        color: var(--text-primary);
        font-weight: 500;
    }
    
    .footer-divider-container {
        display: flex;
        align-items: center;
        width: 100%;
        margin-block: 1rem;
    }
    
    .footer-line {
        flex: 1;
        height: 1px;
        background-color: var(--border-soft);
    }
    
    .footer-join-btn {
        margin-inline: 1.5rem;
        padding: 0.6rem 1.25rem;
        font-size: 0.85rem;
    }
    
    .footer-bottom {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 0.5rem;
    }    
    .footer-subtext {
        font-size: 0.85rem;
        color: var(--text-muted);
    }
}

@layer utilities {
    @keyframes float-3d {
        0%, 100% {
            transform: rotateY(-15deg) rotateX(5deg) translateY(0);
        }
        50% {
            transform: rotateY(-15deg) rotateX(5deg) translateY(-15px);
        }
    }

    .animate-fade-up {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.6s var(--ease-smooth),
                    transform 0.6s var(--ease-smooth);
        will-change: opacity, transform;
    }
    
    .animate-fade-up.is-visible {
        opacity: 1;
        transform: translateY(0);
    }
    
    @media (max-width: 768px) {
        .nav-links {
            display: none; 
        }
        .hero {
            padding-top: calc(var(--nav-height) + 2rem);
            min-height: auto;
        }
        .hero-grid {
            text-align: center;
            justify-items: center;
        }
        .hero-actions {
            justify-content: center;
        }
        .hero-glow {
            top: 20%;
            left: 50%;
            transform: translateX(-50%);
        }
        .about-stats {
            flex-wrap: wrap;
            justify-content: center;
        }
    }
}