:root {
    --bg-color: #0b0f19;
    --primary-color: #6366f1;
    --primary-glow: rgba(99, 102, 241, 0.5);
    --secondary-color: #a855f7;
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.1);
    --glass-blur: blur(12px);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Plus Jakarta Sans', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, .logo {
    font-family: 'Outfit', sans-serif;
    letter-spacing: -0.02em;
}

.background-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(168, 85, 247, 0.15) 0%, transparent 40%);
    z-index: -1;
}

.cursor-blob {
    position: fixed;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: -2;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

/* Navbar */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 0;
    z-index: 1000;
    transition: var(--transition);
}

nav.scrolled {
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: var(--glass-blur);
    padding: 1rem 0;
    border-bottom: 1px solid var(--card-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 3rem;
}

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

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

/* Sections Shared */
section {
    padding: 8rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

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

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--text-dim);
    font-size: 1.1rem;
}

/* Hero Section */
#hero {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-height: 100vh;
    gap: 2rem;
    position: relative;
    overflow: hidden;
}

#hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('hero-bg.png') no-repeat center center;
    background-size: cover;
    mask-image: radial-gradient(circle, rgba(0,0,0,0.8), transparent);
    -webkit-mask-image: radial-gradient(circle, rgba(0,0,0,0.8), transparent);
    z-index: -1;
    opacity: 0.4;
}

.hero-content h2 {
    color: var(--primary-color);
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    margin-bottom: 1rem;
}

.hero-content h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-dim);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero-btns {
    display: flex;
    gap: 1.5rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 10px 20px -10px var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px -10px var(--primary-color);
}

.btn-secondary {
    border: 1px solid var(--card-border);
    color: var(--text-main);
    background: var(--card-bg);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
}

/* Glass Card */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: var(--glass-blur);
    border-radius: 20px;
    padding: 2rem;
    transition: var(--transition);
}

.glass-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    background: rgba(255, 255, 255, 0.05);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.main-card {
    width: 100%;
    max-width: 350px;
    height: 400px;
    display: flex;
    flex-direction: column;
}

.card-dots {
    display: flex;
    gap: 6px;
    margin-bottom: 2rem;
}

.card-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-dim);
}

.chart-mockup {
    flex-grow: 1;
    display: flex;
    align-items: flex-end;
    gap: 12px;
    padding-bottom: 1rem;
}

.bar {
    flex-grow: 1;
    background: linear-gradient(to top, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
    animation: barGrow 2s ease-out forwards;
}

@keyframes barGrow {
    from { height: 0; }
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-category {
    text-align: center;
}

.skill-category i {
    width: 48px;
    height: 48px;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.skill-category h3 {
    margin-bottom: 1rem;
}

.skill-category p {
    color: var(--text-dim);
    font-size: 0.95rem;
}

/* Projects */
.projects-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.project-card {
    padding: 0;
    overflow: hidden;
}

.project-img {
    height: 220px;
    position: relative;
    overflow: hidden;
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.project-card:hover .project-img img {
    transform: scale(1.1);
}

.project-tag {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(11, 15, 25, 0.6);
    backdrop-filter: blur(8px);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid var(--card-border);
}

.project-info {
    padding: 2rem;
}

.project-info h3 {
    margin-bottom: 1rem;
}

.project-info p {
    color: var(--text-dim);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

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

.project-tech span {
    background: rgba(255, 255, 255, 0.05);
    padding: 0.3rem 0.8rem;
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--text-dim);
    border: 1px solid var(--card-border);
}

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

.research-item {
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
}

.research-content-box {
    padding: 2rem;
}

.research-icon {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.research-icon i {
    width: 24px;
    height: 24px;
}

/* Contact */
.contact-box {
    text-align: center;
    padding: 5rem 2rem;
}

.contact-box h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    transition: var(--transition);
}

.contact-item:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Footer */
footer {
    text-align: center;
    padding: 4rem 2rem;
    border-top: 1px solid var(--card-border);
    color: var(--text-dim);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 992px) {
    #hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 10rem;
    }
    .hero-content p {
        margin: 0 auto 2.5rem;
    }
    .hero-btns {
        justify-content: center;
    }
    .nav-links {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 3rem;
    }
}