:root {
    --color-bg: #0a0a0a;
    --color-surface: #141414;
    --color-surface-elevated: #1e1e1e;
    --color-text: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-accent: #00d4ff;
    --color-accent-hover: #00b8e6;
    --color-border: #2a2a2a;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    padding: 1.5rem 0;
}

nav .container {
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav .logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-accent), #00ff88);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav ul {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
}

nav a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: fixed;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.15), transparent);
    top: -250px;
    right: -250px;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(-50px, 50px) rotate(180deg); }
}

.hero-content {
    text-align: center;
    padding: 0 2rem;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--color-accent);
    margin-bottom: 2rem;
    font-weight: 500;
}

.hero h1 {
    font-size: clamp(1.75rem, 6vw, 4rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.gradient-text {
    background: linear-gradient(90deg, var(--color-accent), #00ff88);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--color-accent);
    color: #000;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.btn-secondary {
    background: var(--color-surface-elevated);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

/* Section Styling */
section {
    padding: 6rem 2rem;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.about-card {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

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

.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-accent);
}

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

.project-card {
    background: var(--color-surface);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: var(--transition);
    cursor: pointer;
    max-width: 25%;
}

.project-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.1);
}

.project-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--color-accent);
}

.project-content {
    padding: 2rem;
}

.project-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--color-accent);
}

.project-card p {
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    padding: 0.375rem 0.875rem;
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.skill-category {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--color-border);
}

.skill-category h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--color-accent);
}

.skill-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

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

.skill-bar {
    width: 100%;
    height: 8px;
    background: var(--color-surface-elevated);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent), #00ff88);
    border-radius: 4px;
    transition: var(--transition);
}

/* Contact Section */
.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.contact-links svg {
    color: #00d4ff;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    text-decoration: none;
    color: var(--color-text);
    transition: var(--transition);
}

.contact-link:hover {
    border-color: var(--color-accent);
    transform: translateY(-3px);
}

/* Footer */
footer {
    border-top: 1px solid var(--color-border);
    padding: 3rem 2rem;
    text-align: center;
    color: var(--color-text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    nav ul {
        gap: 1.5rem;
    }
    
    .projects-grid,
    .skills-grid {
        grid-template-columns: 1fr;
    }
}