/* 
    DESIGN SYSTEM: Technical Architecture
    Primary Theme: Deep Slate, Electric Cyan, and Glassmorphism
*/

:root {
    /* Colors */
    --bg-primary: #0a0f1e;
    --bg-secondary: #111827;
    --bg-glass: rgba(17, 24, 39, 0.7);
    --accent: #22d3ee;
    --accent-glow: rgba(34, 211, 238, 0.3);
    --accent-hover: #0891b2;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(34, 211, 238, 0.2);

    /* Spacing */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-6: 48px;
    --space-8: 64px;
    --space-12: 96px;

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 12px;
    --transition: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

/* CUSTOM SCROLLBAR */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* UTILITIES */
.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-2);
}

.section {
    padding: var(--space-12) 0;
}

.bg-secondary {
    background-color: var(--bg-secondary);
}

.text-gradient {
    background: linear-gradient(135deg, var(--accent), #818cf8, #c084fc);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

/* TYPOGRAPHY */
h1,
h2,
h3 {
    line-height: 1.1;
    margin-bottom: var(--space-3);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 800;
}

h2 {
    font-size: clamp(2rem, 5vw, 2.75rem);
    font-weight: 700;
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

.lead {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 650px;
    margin-bottom: var(--space-6);
}

.overline {
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: 10px;
}

.overline::before {
    content: '';
    width: 20px;
    height: 1px;
    background: var(--accent);
    opacity: 0.5;
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-6);
    border-radius: var(--radius);
    font-weight: 600;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    transition: all 0.3s var(--transition);
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px var(--accent-glow);
    filter: brightness(1.1);
}

.btn-outline {
    border-color: var(--border-color);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.btn-small {
    padding: 10px 20px;
    font-size: 0.8rem;
}

/* HEADER */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 15, 30, 0.8);
    backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-3) 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -1px;
}

.logo .accent {
    color: var(--accent);
}

.nav-list {
    display: flex;
    gap: var(--space-4);
    align-items: center;
}

.nav-list a {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.nav-list a:hover {
    color: var(--accent);
}

/* HERO */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    background: radial-gradient(circle at 80% 20%, rgba(34, 211, 238, 0.05) 0%, transparent 40%);
}

.hero-actions {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

/* GRID & ABOUT */
.grid-2-col {
    display: grid;
    gap: var(--space-8);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-3);
}

.stat-card {
    background: var(--bg-glass);
    padding: var(--space-4);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    transition: all 0.4s var(--transition);
}

.stat-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-5px);
}

.stat-card h3 {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 1.1rem;
    margin-bottom: var(--space-1);
}

.stat-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* SKILLS */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-3);
}

.skill-category {
    background: var(--bg-glass);
    padding: var(--space-4);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.skill-category::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.skill-category:hover::after {
    opacity: 1;
}

.skill-icon {
    font-size: 2rem;
    margin-bottom: var(--space-2);
}

.skill-list li {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.skill-list li::before {
    content: '>';
    color: var(--accent);
    font-weight: bold;
}

/* PROJECTS */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-4);
}

.project-card {
    background: var(--bg-primary);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.5s var(--transition);
    position: relative;
}

.project-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.5);
}

.project-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    color: var(--accent);
    padding: 6px 12px;
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    border: 1px solid var(--border-accent);
    z-index: 10;
}

.project-image {
    width: 100%;
    height: 300px;
    object-fit: contain;
    background: var(--bg-secondary);
    opacity: 0.9;
    transition: all 0.4s var(--transition);
}

.project-card:hover .project-image {
    opacity: 1;
    transform: scale(1.05);
}

.project-content {
    padding: var(--space-4);
}

.tags {
    display: flex;
    gap: 10px;
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

.tags span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

.link-arrow {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--accent);
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 0.85rem;
}

.link-arrow:hover {
    gap: 15px;
}

/* CONTACT */
.contact-wrapper {
    display: grid;
    gap: var(--space-12);
}

.contact-intro h2 {
    margin-bottom: var(--space-4);
}

.email-link {
    font-family: var(--font-mono);
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 8px;
}

.contact-form {
    background: var(--bg-glass);
    padding: var(--space-6);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: var(--space-4);
}

.form-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    padding: 15px;
    border-radius: 8px;
    color: #fff;
    font-family: var(--font-sans);
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* FOOTER */
.footer {
    padding: var(--space-8) 0;
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

.footer p {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.social-links {
    display: flex;
    gap: var(--space-4);
}

.social-links a {
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.social-links a:hover {
    color: var(--accent);
}

/* RESPONSIVE */
@media (min-width: 768px) {
    .grid-2-col {
        grid-template-columns: 1fr 1fr;
        align-items: center;
    }

    .footer-content {
        flex-direction: row;
        justify-content: space-between;
    }
}

@media (max-width: 768px) {
    .nav-list {
        display: none;
        /* Hide nav links on mobile for simplicity or you could add a burger */
    }

    .section {
        padding: var(--space-8) 0;
    }
}

/* ANIMATIONS */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s var(--transition);
}

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