:root {
    --bg-dark: #0b1120;
    --bg-card: #1e293b;
    --primary: #3b82f6;
    /* Blue 500 */
    --primary-glow: rgba(59, 130, 246, 0.5);
    --secondary: #64748b;
    /* Slate 500 */
    --accent: #22d3ee;
    /* Cyan 400 */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --font-heading: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Background & Overlay */
.background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(to bottom, rgba(11, 17, 32, 0.85), rgba(11, 17, 32, 0.95)),
        url('assets/tech_background.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1,
h2,
h3 {
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3.5rem;
    line-height: 1.1;
}

h2 {
    font-size: 2.5rem;
}

p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.overline {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    display: block;
}

/* Header */
.glass-header {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background: rgba(11, 17, 32, 0.7);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1rem 0;
    transition: all 0.3s ease;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-main);
    letter-spacing: -0.05em;
}

.logo .highlight {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Buttons */
.btn-primary {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: 1px solid var(--primary);
    box-shadow: 0 4px 14px 0 var(--primary-glow);
}

.btn-primary:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

.btn-secondary {
    display: inline-block;
    background: transparent;
    color: var(--text-main);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-left: 1rem;
}

.btn-secondary:hover {
    border-color: var(--text-main);
}

/* Sections */
section {
    padding: 6rem 0;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
}

.hero-content {
    max-width: 800px;
}

.section-dark {
    position: relative;
    z-index: 1;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

/* Grid & Cards */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.glass-card {
    background: rgba(30, 41, 59, 0.4);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 12px;
    transition: transform 0.3s ease, border-color 0.3s;
}

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

.icon {
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.project-card {
    background: linear-gradient(145deg, rgba(30, 30, 30, 0.5), rgba(20, 20, 20, 0.8));
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s;
}

.project-card:hover {
    border-color: var(--accent);
}

.tags {
    list-style: none;
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

.tags li {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--accent);
    background: rgba(34, 211, 238, 0.1);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.section-center {
    text-align: center;
}

/* Footer */
.glass-footer {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 3rem 0;
    margin-top: 4rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links a {
    color: var(--text-muted);
    margin-left: 2rem;
    text-decoration: none;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--primary);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s forwards;
}

.fade-in-delay {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s 0.2s forwards;
}

.fade-in-delay-2 {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s 0.4s forwards;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile Toggle */
.menu-toggle {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-main);
    transition: all 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

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

    .menu-toggle {
        display: block;
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }
}