:root {
    --primary: #6366f1;
    /* Indigo */
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #0f172a;
    --dark: #020617;
    --light: #ffffff;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --accent: #f59e0b;
    /* Amber for organization */
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--dark);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    color: var(--light);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 0;
    z-index: 1000;
    transition: 0.3s;
    background: rgba(2, 6, 23, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--light);
    letter-spacing: -0.5px;
}

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

.nav-menu {
    display: flex;
    gap: 35px;
}

.nav-link {
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    position: relative;
    padding-bottom: 5px;
    transition: 0.3s;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: 0.3s;
}

.nav-link:hover {
    color: var(--light);
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(ellipse at top, rgba(99, 102, 241, 0.15), transparent 50%),
        radial-gradient(ellipse at bottom, rgba(245, 158, 11, 0.1), transparent 50%),
        var(--dark);
    position: relative;
    padding: 100px 20px;
}

.hero-content {
    max-width: 900px;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--light) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeInUp 0.8s ease forwards;
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.3rem);
    color: var(--text-muted);
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.hero-tags {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

.tag {
    padding: 8px 20px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    font-size: 0.9rem;
    color: var(--text);
}

.tag.programming {
    border-color: var(--primary);
    color: var(--primary);
}

.tag.organization {
    border-color: var(--accent);
    color: var(--accent);
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.6s forwards;
    opacity: 0;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    background: transparent;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 13px;
    font-weight: 600;
    border: 2px solid var(--primary);
    border-radius: 8px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary);
    color: var(--light);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-secondary:hover {
    background: var(--accent);
    color: var(--dark);
    transform: translateY(-2px);
}

/* Section Common */
section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--primary);
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: 15px;
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Skills Section */
.skills {
    background: var(--secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.skill-category {
    background: var(--glass);
    padding: 35px 25px;
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.skill-category:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
}

.skill-icon {
    font-size: 32px;
}

.skill-category h3 {
    font-size: 1.3rem;
    margin: 0;
}

.skill-list {
    list-style: none;
}

.skill-item {
    margin-bottom: 18px;
}

.skill-name {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.skill-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 10px;
    transition: width 1s ease;
}

/* Projects Section */
.projects {
    background: var(--dark);
}

.project-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 25px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 25px;
    color: var(--text);
    cursor: pointer;
    transition: 0.3s;
    font-size: 0.9rem;
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 35px;
}

.project-card {
    position: relative;
    height: 400px;
    overflow: hidden;
    border-radius: 12px;
    cursor: pointer;
    background: var(--secondary);
}

.project-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.95), transparent 60%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
    opacity: 0;
    transition: 0.3s;
}

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

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

.project-type-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 6px 15px;
    background: var(--primary);
    border-radius: 20px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-type-badge.organization {
    background: var(--accent);
}

.project-overlay h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.project-overlay p {
    color: var(--text-muted);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

/* Contact Section */
.contact {
    background: var(--secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 30px;
}

.contact-item {
    margin-bottom: 25px;
}

.contact-item strong {
    display: block;
    color: var(--primary);
    margin-bottom: 5px;
    font-size: 0.9rem;
}

.contact-item p {
    color: var(--text-muted);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--light);
    margin-bottom: 20px;
    font-family: inherit;
    font-size: 1rem;
    transition: 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.08);
}

.footer {
    padding: 40px 0;
    background: var(--dark);
    text-align: center;
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

/* Mobile */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

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

    .cta-buttons {
        flex-direction: column;
    }
}