:root {
    --bg-color: #0d0f14;
    --card-bg: rgba(30, 32, 40, 0.7);
    --primary-color: #00ff9d;
    --accent-color: #ff9d00;
    --text-primary: #f0f2f5;
    --text-secondary: #a0a6b1;
    --glass-border: rgba(255, 255, 255, 0.1);
    --glow: 0 0 15px rgba(0, 255, 157, 0.4);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* Glassmorphism Utility */
.glass {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
    background: #333;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

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

.mono {
    font-family: 'JetBrains Mono', monospace;
}

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

section {
    padding: 100px 0;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: all 0.3s ease;
}

nav.scrolled {
    background: rgba(13, 15, 20, 0.8);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.5rem;
    z-index: 2000;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 15% 50%, rgba(0, 255, 157, 0.08), transparent 50%),
                radial-gradient(circle at 85% 30%, rgba(255, 157, 0, 0.05), transparent 50%),
                var(--bg-color);
    z-index: -1;
}

.hero-content h1 {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-content .subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-weight: 500;
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 25px rgba(0, 255, 157, 0.6);
}

/* Skills */
.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.skill-card {
    padding: 2rem;
    transition: transform 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-10px);
}

.skill-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Portfolio */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    height: 350px;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover {
    transform: scale(1.02) translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.project-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent, rgba(0, 255, 157, 0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

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

.project-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2.5rem;
    background: linear-gradient(transparent, rgba(13, 15, 20, 0.95));
    transition: all 0.3s ease;
}

.project-card:hover .project-info {
    padding-bottom: 3rem;
}

/* Experience/CV */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline-item {
    margin-bottom: 0;
    padding: 3rem 2rem;
    border-left: 1px solid var(--glass-border);
    margin-left: 30px;
    position: relative;
    transition: background 0.3s ease;
}

.timeline-item:hover {
    background: rgba(255, 255, 255, 0.02);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 3.5rem;
    width: 11px;
    height: 11px;
    background: var(--bg-color);
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    z-index: 2;
}

.timeline-date {
    display: inline-block;
    padding: 0.2rem 0.8rem;
    background: rgba(0, 255, 157, 0.1);
    border: 1px solid rgba(0, 255, 157, 0.2);
    border-radius: 20px;
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
    font-family: 'JetBrains Mono', monospace;
}

/* Footer */
footer {
    padding: 4rem 0;
    text-align: center;
    border-top: 1px solid var(--glass-border);
}

/* Contact Form */
.contact-form {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    text-align: left;
}

.contact-form.active {
    max-height: 800px;
    opacity: 1;
    margin-top: 3rem;
    padding-bottom: 2rem;
}

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

.form-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 10px rgba(0, 255, 157, 0.1);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

.btn-submit {
    border: none;
    width: 100%;
}

@media (max-width: 768px) {
    section {
        padding: 70px 0;
    }

    .container {
        padding: 0 1.5rem;
    }

    .hero-content h1 {
        font-size: 3rem;
    }

    .hero-content .subtitle {
        font-size: 1.1rem;
    }

    /* Mobile Menu */
    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: flex;
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: #0d0f14;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: -10px 0 30px rgba(0,0,0,0.5);
        z-index: 1500;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.2rem;
        padding: 1rem 0;
    }

    /* Timeline Mobile */
    .timeline-item {
        margin-left: 20px;
        padding: 2rem 1.2rem;
    }

    .timeline-date {
        font-size: 0.75rem;
    }

    /* Typography */
    .section-title {
        font-size: 2rem;
    }

    /* Portfolio Mobile */
    .project-card {
        height: auto;
        min-height: 300px;
    }

    .project-info {
        padding: 1.5rem;
    }

    .skill-card {
        padding: 1.5rem;
    }

    .btn {
        width: 100%;
        min-width: unset !important;
        text-align: center;
        padding: 1rem 1.5rem;
    }
}

@media (max-width: 1024px) {
    .hero-content h1 {
        font-size: 3.8rem;
    }
    .hero-content .subtitle {
        font-size: 1.3rem;
    }
    section {
        padding: 80px 0;
    }
}

/* Fix for horizontal scroll */
body, html {
    max-width: 100vw;
    overflow-x: hidden;
}