:root {
    --bg-color: #f8fafc;
    --text-color: #0f172a;
    --text-muted: #64748b;
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(255, 255, 255, 0.5);
    --accent-color: #3b82f6;
    --pill-bg: #e2e8f0;
    --pill-text: #1e293b;
    --glass-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.08);
    --accent-color: #60a5fa;
    --pill-bg: #1e293b;
    --pill-text: #e2e8f0;
    --glass-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

/* Background gradient effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.08), transparent 25%),
                radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.08), transparent 25%);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Navbar */
nav {
    padding: 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
}

.nav-content {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 1px;
}

#theme-toggle {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    transition: transform 0.2s ease;
}
#theme-toggle:hover {
    transform: scale(1.1);
}

/* Hero Section */
#hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    margin-bottom: 4rem;
    gap: 2rem;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.highlight {
    background: linear-gradient(135deg, var(--accent-color), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    max-width: 500px;
}

.contact-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-outline {
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: var(--text-color);
    backdrop-filter: blur(8px);
}

.btn-outline:hover {
    background: var(--pill-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.hero-avatar {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-color), #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

.hero-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

@media (max-width: 640px) {
    #hero {
        flex-direction: column-reverse;
        text-align: center;
        align-items: center;
    }
    .contact-links {
        justify-content: center;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
}

/* Sections */
section {
    margin-bottom: 4rem;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--glass-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.glass-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Skills */
.skill-category {
    margin-bottom: 1.5rem;
}
.skill-category h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    color: var(--text-muted);
}
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.skill-pill {
    background: var(--pill-bg);
    color: var(--pill-text);
    padding: 0.4rem 0.8rem;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--card-border);
    transition: all 0.2s ease;
}
.skill-pill:hover {
    background: var(--accent-color);
    color: white;
    transform: translateY(-2px);
}

/* Projects */
.projects-grid, .research-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.project-card h3, .research-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.project-tech {
    font-size: 0.8rem !important;
    color: var(--accent-color) !important;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

/* Patents & Research */
.status {
    display: inline-block;
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.research-screenshots {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 1rem;
}

.research-screenshots img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform 0.2s ease;
    cursor: pointer;
}

.research-screenshots img:hover {
    transform: scale(1.05);
}

.patent-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

.research-text {
    flex: 1;
}

.research-gif {
    width: 250px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

@media (max-width: 640px) {
    .research-screenshots {
        grid-template-columns: 1fr;
    }
    .patent-card {
        flex-direction: column;
    }
    .research-gif {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    .eop-grid {
        grid-template-columns: 1fr !important;
    }
}

/* Education & Certifications */
.edu-cert-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (max-width: 640px) {
    .edu-cert-container {
        grid-template-columns: 1fr;
    }
}

.gpa {
    font-weight: 600;
    color: var(--text-color) !important;
    margin-top: 0.5rem;
}

.cert-list {
    list-style: none;
}
.cert-list li {
    margin-bottom: 0.75rem;
}
.cert-link {
    font-size: 0.95rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: color 0.2s ease;
}
.cert-link:hover {
    color: var(--accent-color);
}
.cert-list i {
    color: var(--accent-color);
}

/* Badge Image Styles */
.edu-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.edu-content {
    flex: 1;
}

.badge-img {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.school-logo {
    border-radius: 12px;
}

.cert-badge-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 4px;
}

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

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Floating Island */
.floating-island {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 0.75rem 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 50px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    transition: all 0.3s ease;
}

.floating-island:hover {
    transform: translateX(-50%) translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.floating-island a {
    color: var(--text-muted);
    font-size: 1.25rem;
    transition: color 0.3s ease, transform 0.2s ease;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-island a:hover {
    color: var(--accent-color);
    transform: scale(1.15);
}

.island-divider {
    width: 1px;
    height: 24px;
    background: var(--card-border);
    margin: 0 0.25rem;
}