:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-card: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --accent-primary: #00d4ff;
    --accent-secondary: #ff6b6b;
    --accent-gradient: linear-gradient(135deg, #00d4ff, #ff6b6b);
    --border-color: #2a2a2a;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.4);
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.15);
    --glass: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: all 0.3s ease;
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--glass);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width 0.3s ease;
}

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

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

.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.theme-toggle:hover {
    background: var(--glass);
    transform: translateY(-1px);
}

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255, 107, 107, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(0, 212, 255, 0.05) 0%, transparent 50%);
    animation: gradient-float 8s ease-in-out infinite;
}

@keyframes gradient-float {
    0%, 100% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.1); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-text h1 .gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text .subtitle {
    font-size: 1.5rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 1.5rem;
    min-height: 2rem;
}

.hero-text .description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    line-height: 1.6;
}

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

.btn {
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.hero-image {
    position: relative;
}

.hero-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: var(--accent-gradient);
    border-radius: 50%;
    z-index: -1;
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.05); }
}

.hero-image img {
    width: 100%;
    border-radius: 50%;
    border: 4px solid var(--bg-primary);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Section Styles */
.section {
    padding: 6rem 0;
    position: relative;
}

.section-title {
    text-align: center;
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 4rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--accent-gradient);
    border-radius: 2px;
}

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

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

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
}

.skill-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent-primary);
}

.skill-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tag {
    background: var(--glass);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-tag:hover {
    background: var(--accent-gradient);
    color: white;
    transform: translateY(-2px);
}

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

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent-primary);
}

.project-header {
    padding: 2rem;
    background: var(--accent-gradient);
    color: white;
    position: relative;
}

.project-header h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.project-tech {
    opacity: 0.9;
    font-size: 0.9rem;
}

.project-content {
    padding: 2rem;
}

.project-features {
    list-style: none;
    margin-bottom: 1.5rem;
}

.project-features li {
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    padding-left: 2rem;
    color: var(--text-secondary);
}

.project-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
    font-size: 1.2rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--glass);
    color: var(--text-primary);
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.project-link:hover {
    background: var(--accent-gradient);
    color: white;
    transform: translateY(-2px);
}

/* Education Section */
.education {
    background: var(--bg-secondary);
}

.education-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.education-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--accent-gradient);
    transform: translateX(-50%);
}

.education-item {
    position: relative;
    margin: 2rem 0;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    width: 45%;
    transition: all 0.3s ease;
}

.education-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.education-item:nth-child(odd) {
    left: 0;
    margin-right: auto;
}

.education-item:nth-child(even) {
    left: auto;
    right: 0;
    margin-left: auto;
}

/* .education-item::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 15px;
    height: 15px;
    background: var(--accent-primary);
    border: 3px solid var(--bg-primary);
    border-radius: 50%;
    transform: translateY(-50%);
} */

.education-item:nth-child(odd)::before {
    right: -32px;
}

.education-item:nth-child(even)::before {
    left: -32px;
}

/* Footer */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--glass);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1.2rem;
}

.social-link:hover {
    background: var(--accent-gradient);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .nav-links {
        display: none;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-text {
        order: 2;
    }

    .hero-image {
        order: 1;
        max-width: 250px;
        margin: 0 auto;
    }

    .cta-buttons {
        justify-content: center;
    }

    .education-timeline::before {
        left: 20px;
    }

    .education-item {
        width: 100%;
        padding-left: 3rem;
        left: 0 !important;
        right: auto !important;
        margin: 2rem 0;
    }

    .education-item::before {
        left: 12px !important;
        right: auto !important;
    }
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--accent-gradient);
    border-radius: 4px;
}

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