@import url('https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;600&family=JetBrains+Mono:wght@400;500;700&family=Outfit:wght@300;400;500;600;700;800&display=swap');

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

@layer reset {

    *,
    *::before,
    *::after {
        box-sizing: border-box;
    }

    body,
    h1,
    h2,
    h3,
    p,
    figure,
    blockquote,
    dl,
    dd {
        margin: 0;
    }

    ul[role='list'],
    ol[role='list'] {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    html {
        background-color: var(--color-bg-base);
    }

    html:focus-within {
        scroll-behavior: smooth;
    }

    body {
        min-height: 100dvh;
        text-rendering: optimizeSpeed;
        line-height: 1.5;
    }

    a:not([class]) {
        text-decoration-skip-ink: auto;
    }

    img,
    picture {
        max-width: 100%;
        display: block;
    }

    input,
    button,
    textarea,
    select {
        font: inherit;
    }

    @media (prefers-reduced-motion: reduce) {
        html:focus-within {
            scroll-behavior: auto;
        }

        *,
        *::before,
        *::after {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
            scroll-behavior: auto !important;
        }
    }
}

@layer theme {
    :root {
        /* Colors - Precision Engineering Palette */
        --color-bg-base: #0a0a0a;
        --color-surface: #171717;
        --color-surface-hover: #1e1e1e;
        
        --color-primary: #3b82f6; /* Electric Blue */
        --color-primary-hover: #60a5fa;
        --color-secondary: #8b5cf6; /* Muted Violet */

        --color-border: #262626;
        --color-border-hover: #3b82f6;

        --color-text-main: #ffffff; /* Headings */
        --color-text-body: #d4d4d4; /* Body text */
        --color-text-muted: #a3a3a3; /* Metadata/Tags */
        
        --color-on-surface-variant: #c2c6d6;
        --color-outline-variant: #424754;
        --color-on-primary-fixed: #001a42;

        /* Typography */
        --font-family-display: 'Outfit', sans-serif;
        --font-family-body: 'Hanken Grotesk', sans-serif;
        --font-family-mono: 'JetBrains Mono', monospace;

        /* Geometry & Transitions */
        --radius-sm: 4px;
        --radius-base: 8px;
        --transition-base: 0.2s ease-out;
    }
}

@layer base {
    body {
        font-family: var(--font-family-body);
        background-color: var(--color-bg-base);
        color: var(--color-text-body);
        -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, h5, h6 {
        font-family: var(--font-family-display);
        color: var(--color-text-main);
        text-wrap: balance;
        line-height: 1.2;
        letter-spacing: -0.02em;
    }

    p {
        text-wrap: pretty;
        color: var(--color-text-body);
    }

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

@layer components {

    /* Layout */
    .noise-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        pointer-events: none;
        z-index: 1000;
        background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
        opacity: 0.02;
    }

    .app-container {
        display: flex;
        flex-direction: column;
        min-height: 100dvh;
    }

    /* Header / Nav */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 50;
        background: var(--color-bg-base);
        border-bottom: 1px solid var(--color-border);
        padding: 1rem 2rem;
    }

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

    .nav-logo {
        font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        font-weight: 900;
        font-size: 2rem;
        background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        letter-spacing: -0.05em;
        transition: opacity var(--transition-base);
    }

    .nav-logo:hover {
        opacity: 0.8;
    }

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

    .nav-links a {
        font-weight: 600;
        color: var(--color-text-muted);
        transition: color var(--transition-base);
        position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
        color: var(--color-text-main);
    }

    .nav-links a::after {
        content: '';
        position: absolute;
        bottom: -4px;
        left: 0;
        width: 100%;
        height: 2px;
        background: var(--color-primary);
        transform: scaleX(0);
        transform-origin: right;
        transition: transform var(--transition-base);
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
        transform: scaleX(1);
        transform-origin: left;
    }

    /* Mobile Menu Toggle */
    .mobile-menu-btn {
        display: none;
        background: none;
        border: none;
        color: var(--color-text-main);
        cursor: pointer;
    }

    /* Main Content Area */
    .main-content {
        flex: 1;
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 2rem;
        display: flex;
        flex-direction: column;
        gap: 6rem;
    }

    /* Section Shared */
    .section-padding {
        scroll-margin-top: 100px;
        container-type: inline-size;
    }

    .section-title {
        font-size: clamp(2rem, 5cqi, 3rem);
        font-weight: 700;
        margin-bottom: 3rem;
        display: flex;
        align-items: center;
        gap: 1rem;
    }

    .section-title::before {
        content: '';
        width: 4px;
        height: clamp(24px, 4cqi, 36px);
        background: var(--color-primary);
        border-radius: 2px;
    }

    /* Hero Section */
    .hero {
        min-height: calc(100dvh - 200px);
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 4rem;
    }

    .hero-content {
        flex: 1;
    }

    .hero-greeting {
        color: var(--color-primary);
        font-family: var(--font-family-mono);
        font-weight: 500;
        font-size: 12px;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        margin-bottom: 1rem;
    }

    .hero-title {
        font-size: clamp(3rem, 8cqi, 5rem);
        font-weight: 800;
        line-height: 1.1;
        margin-bottom: 1rem;
    }

    .hero-subtitle {
        font-size: clamp(1.25rem, 3cqi, 2rem);
        color: var(--color-text-muted);
        margin-bottom: 2rem;
        font-weight: 300;
    }

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

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        padding: 0.75rem 1.5rem;
        border-radius: var(--radius-base);
        font-weight: 500;
        font-family: var(--font-family-body);
        cursor: pointer;
        transition: var(--transition-base);
        border: 1px solid var(--color-border);
        background: transparent;
        color: var(--color-text-main);
    }

    .lucide-spin {
        animation: spin 2s linear infinite;
    }

    @keyframes spin {
        100% {
            transform: rotate(360deg);
        }
    }

    .btn-primary {
        background: var(--color-primary);
        border-color: var(--color-primary);
        color: var(--color-on-primary-fixed);
    }

    @keyframes pulse-glow {
        0% {
            box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4);
        }
        70% {
            box-shadow: 0 0 0 10px rgba(59, 130, 246, 0);
        }
        100% {
            box-shadow: 0 0 0 0 rgba(59, 130, 246, 0);
        }
    }

    .btn-primary:hover {
        background: var(--color-primary-hover);
        border-color: var(--color-primary-hover);
        color: var(--color-bg-base);
        animation: pulse-glow 1.5s infinite;
    }

    .btn-outline {
        background: transparent;
        border-color: var(--color-border);
        color: var(--color-text-body);
    }

    .btn-outline:hover {
        border-color: var(--color-primary);
        color: var(--color-primary);
    }

    /* Hero Image */
    @keyframes float {
        0% { transform: translateY(0px); }
        50% { transform: translateY(-10px); }
        100% { transform: translateY(0px); }
    }

    .hero-image-wrapper {
        position: relative;
        width: clamp(250px, 30vw, 400px);
        aspect-ratio: 1;
        border-radius: var(--radius-base);
        border: 1px solid var(--color-border);
        overflow: hidden;
        animation: float 6s ease-in-out infinite;
    }

    .hero-img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        filter: grayscale(100%);
        transition: filter 0.5s ease;
    }

    .hero-img:hover {
        filter: grayscale(0);
    }

    /* About Section */
    .about-grid {
        max-width: 720px;
    }

    .about-text p {
        font-size: 1.1rem;
        margin-bottom: 1.5rem;
    }

    .quote-box {
        padding: 1.5rem;
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-left: 4px solid var(--color-primary);
        border-radius: var(--radius-sm);
        color: var(--color-text-body);
        font-size: 1.1rem;
        margin-top: 2rem;
    }

    /* Education Timeline */
    .timeline {
        position: relative;
        padding-left: 2rem;
    }

    .timeline-line {
        position: absolute;
        left: 15px;
        top: 0;
        bottom: 0;
        width: 1px;
        background: rgba(255, 255, 255, 0.1);
    }

    .timeline-items {
        display: flex;
        flex-direction: column;
        gap: 3rem;
        position: relative;
        z-index: 10;
    }

    .timeline-item {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        position: relative;
    }

    .timeline-left {
        margin-bottom: 1rem;
    }

    .timeline-year {
        border: 1px solid var(--color-border);
        padding: 0.25rem 0.75rem;
        border-radius: var(--radius-sm);
        background: var(--color-bg-base);
    }

    .timeline-item.active .timeline-year {
        border-color: rgba(59, 130, 246, 0.3); /* primary/30 */
    }

    .timeline-node {
        position: absolute;
        left: 0;
        top: 0.5rem;
        width: 1rem;
        height: 1rem;
        background: var(--color-bg-base);
        border: 2px solid var(--color-outline-variant);
        border-radius: 50%;
        transform: translateX(-50%);
        z-index: 10;
    }

    .timeline-item.active .timeline-node {
        border-color: var(--color-primary);
    }

    .timeline-right {
        padding-left: 2rem;
        width: 100%;
    }

    .timeline-content {
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-sm);
        padding: 1.5rem;
        transition: var(--transition-base);
    }

    .timeline-content h4 {
        font-size: 1.1rem;
        color: var(--color-text-main);
        margin-bottom: 0.5rem;
    }

    .timeline-content p {
        font-size: 0.95rem;
        margin-bottom: 0;
    }

    @media (min-width: 768px) {
        .timeline {
            padding-left: 0;
        }

        .timeline-line {
            left: 50%;
            transform: translateX(-50%);
        }

        .timeline-item {
            flex-direction: row;
            align-items: center;
        }

        .timeline-left {
            width: 50%;
            padding-right: 3rem;
            text-align: right;
            margin-bottom: 0;
        }

        .timeline-node {
            left: 50%;
            top: auto;
        }

        .timeline-right {
            width: 50%;
            padding-left: 3rem;
        }
    }

    /* Skills */
    .skills-grid {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 2rem;
    }

    .skill-category {
        flex: 1 1 320px;
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-sm);
        padding: 2rem;
        transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    }

    .skill-category:hover {
        transform: translateY(-4px);
        box-shadow: 0 10px 30px -10px rgba(59, 130, 246, 0.1); /* Primary color shadow */
        border-color: var(--color-border-hover);
    }

    .skill-category h3 {
        color: var(--color-text-main);
        margin-bottom: 1.5rem;
        font-size: 1.2rem;
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .skill-list {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .skill-tag {
        background: var(--color-bg-base);
        border: 1px solid var(--color-border);
        padding: 0.5rem 1rem;
        border-radius: var(--radius-sm);
        font-family: var(--font-family-mono);
        font-size: 14px;
        font-weight: 500;
        color: var(--color-text-main);
        transition: var(--transition-base);
    }

    .skill-tag:hover {
        border-color: var(--color-primary);
        color: var(--color-primary);
        transform: scale(1.05);
    }

    /* Projects */
    .projects-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: 2rem;
    }

    .project-card {
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-base);
        padding: 2rem;
        display: flex;
        flex-direction: column;
        transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        height: 100%;
        position: relative;
        overflow: hidden;
    }

    .project-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 2px;
        background: var(--color-primary);
        opacity: 0;
        transition: var(--transition-base);
    }

    .project-card:hover {
        border-color: var(--color-primary);
        transform: translateY(-4px);
        box-shadow: 0 10px 30px -10px rgba(59, 130, 246, 0.1);
    }

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

    .project-header {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        margin-bottom: 1rem;
    }

    .project-title {
        font-size: 1.4rem;
        color: var(--color-text-main);
    }

    .project-links a {
        color: var(--color-text-muted);
        transition: var(--transition-base);
    }

    .project-links a:hover {
        color: var(--color-secondary);
    }

    .project-role {
        display: inline-block;
        font-family: var(--font-family-mono);
        font-size: 12px;
        color: var(--color-on-surface-variant);
        background: transparent;
        border: none;
        padding: 0;
        border-radius: 0;
        margin-bottom: 1rem;
        font-weight: 500;
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }

    .project-desc {
        flex: 1;
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }

    .project-tech {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        margin-top: auto;
    }

    .project-tech span {
        font-size: 10px;
        color: var(--color-text-main);
        font-family: var(--font-family-mono);
        background: var(--color-bg-base);
        border: 1px solid var(--color-border);
        padding: 0.25rem 0.5rem;
        border-radius: var(--radius-sm);
        letter-spacing: 0.05em;
    }

    /* Hobbies */
    .hobbies-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    @media (min-width: 768px) {
        .hobbies-grid {
            grid-template-columns: repeat(4, 1fr);
        }
    }

    .hobby-card {
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        padding: 1rem;
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        gap: 0.75rem;
        transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    }

    .hobby-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 10px 30px -10px rgba(59, 130, 246, 0.1);
        background: var(--color-surface-hover);
        border-color: var(--color-primary);
    }

    .hobby-card i {
        color: var(--color-primary);
        width: 20px;
        height: 20px;
    }

    /* Contact */
    .contact-container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 4rem;
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-base);
        padding: 3rem;
    }

    .contact-info p {
        margin-bottom: 2rem;
        font-size: 1.1rem;
    }

    .social-links {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .social-link {
        display: flex;
        align-items: center;
        gap: 1rem;
        padding: 1rem;
        background: transparent;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-base);
        transition: var(--transition-base);
    }

    .social-link:hover {
        background: var(--color-primary);
        border-color: var(--color-primary);
        color: white;
    }

    .contact-form {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }

    .form-group {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }

    .form-group label {
        font-family: var(--font-family-mono);
        font-size: 0.85rem;
        color: var(--color-text-muted);
    }

    .form-control {
        background: var(--color-bg-base);
        border: 1px solid var(--color-border);
        padding: 1rem;
        border-radius: var(--radius-sm);
        color: var(--color-text-main);
        transition: var(--transition-base);
        font-family: var(--font-family-body);
    }

    .form-control:focus {
        outline: none;
        border-color: var(--color-primary);
    }

    textarea.form-control {
        resize: vertical;
        min-height: 120px;
    }

    #form-status {
        display: none;
        margin-top: 1rem;
        padding: 1rem;
        border-radius: var(--radius-sm);
        font-weight: 500;
        font-family: var(--font-family-mono);
    }

    /* Footer */
    .site-footer {
        text-align: center;
        padding: 2rem;
        color: var(--color-text-muted);
        border-top: 1px solid var(--color-border);
        margin-top: 4rem;
    }
}

@layer utilities {

    /* Typography Utilities */
    .text-display {
        font-family: var(--font-family-display);
        font-size: 72px;
        line-height: 1.1;
        letter-spacing: -0.04em;
        font-weight: 700;
    }

    .text-headline-lg {
        font-family: var(--font-family-display);
        font-size: 48px;
        line-height: 1.2;
        letter-spacing: -0.03em;
        font-weight: 600;
    }

    .text-headline-md {
        font-family: var(--font-family-display);
        font-size: 32px;
        line-height: 1.3;
        letter-spacing: -0.02em;
        font-weight: 600;
    }

    .text-headline-sm {
        font-family: var(--font-family-display);
        font-size: 24px;
        line-height: 1.4;
        letter-spacing: -0.01em;
        font-weight: 500;
    }

    .text-body-lg {
        font-family: var(--font-family-body);
        font-size: 18px;
        line-height: 1.6;
        font-weight: 400;
    }

    .text-body-md {
        font-family: var(--font-family-body);
        font-size: 16px;
        line-height: 1.6;
        font-weight: 400;
    }

    .text-label-md {
        font-family: var(--font-family-mono);
        font-size: 14px;
        line-height: 1.2;
        letter-spacing: 0.02em;
        font-weight: 500;
    }

    .text-label-sm {
        font-family: var(--font-family-mono);
        font-size: 12px;
        line-height: 1.2;
        letter-spacing: 0.05em;
        font-weight: 500;
    }

    .text-label-xs {
        font-family: var(--font-family-mono);
        font-size: 10px;
        line-height: 1.2;
        letter-spacing: 0.05em;
        font-weight: 500;
    }

    .font-mono {
        font-family: var(--font-family-mono) !important;
    }

    .tracking-widest {
        letter-spacing: 0.1em !important;
    }

    .uppercase {
        text-transform: uppercase !important;
    }

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

    /* Scroll Reveal Animations - Native CSS! */
    @media (prefers-reduced-motion: no-preference) {
        @supports ((animation-timeline: view()) and (animation-range: entry)) {
            .reveal-on-scroll {
                animation: slide-up auto linear forwards;
                animation-timeline: view(block);
                animation-range: entry 5% cover 30%;
                opacity: 0;
            }

            @keyframes slide-up {
                from {
                    opacity: 0;
                    transform: translateY(40px) scale(0.95);
                }

                to {
                    opacity: 1;
                    transform: translateY(0) scale(1);
                }
            }
        }

        /* Fallback classes for IntersectionObserver in unsupported browsers */
        @supports not ((animation-timeline: view()) and (animation-range: entry)) {
            .reveal-on-scroll {
                opacity: 0;
                transform: translateY(40px) scale(0.95);
                transition: opacity 0.8s ease-out, transform 0.8s ease-out;
            }

            .reveal-on-scroll.is-visible {
                opacity: 1;
                transform: translateY(0) scale(1);
            }
        }
    }

    /* Responsive adjustments */
    @media (max-width: 900px) {
        .hero {
            flex-direction: column-reverse;
            text-align: center;
            justify-content: center;
            gap: 3rem;
            padding-top: 2rem;
        }

        .hero-buttons {
            justify-content: center;
        }

        .about-grid {
            grid-template-columns: 1fr;
        }

        .contact-container {
            grid-template-columns: 1fr;
            gap: 3rem;
            padding: 2rem;
        }
    }

    @media (max-width: 768px) {
        .nav-links {
            display: none;
            flex-direction: column;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background: var(--color-surface);
            padding: 2rem;
            border-bottom: 1px solid var(--color-border);
            gap: 1.5rem;
        }

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

        .mobile-menu-btn {
            display: block;
        }

        .main-content {
            padding: 1.5rem;
            gap: 4rem;
        }
    }
}