:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --bg-card: #1f2937;
    --border-color: #374151;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-blue: #38bdf8;
    --accent-cyan: #2dd4bf;
    --accent-purple: #a855f7;
    --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #3b82f6 50%, #8b5cf6 100%);
    --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --transition: all 0.25s ease-in-out;
}

body.light-theme {
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    transition: var(--transition);
}

body.light-theme .navbar {
    background: rgba(248, 250, 252, 0.85);
}

.nav-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-accent {
    color: var(--accent-blue);
}

.nav-links {
    display: flex;
    gap: 28px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.theme-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
}

.theme-btn:hover {
    transform: rotate(20deg);
    border-color: var(--accent-blue);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(56, 189, 248, 0.35);
}

.btn-primary:hover {
    opacity: 0.92;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.45);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.btn-sm {
    padding: 7px 14px;
    font-size: 0.85rem;
}

/* Hero Section */
.hero-section {
    padding: 80px 0 60px;
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-content {
    flex: 1;
}

.badge-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 9999px;
    color: #4ade80;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: #22c55e;
    border-radius: 50%;
    box-shadow: 0 0 8px #22c55e;
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #f9fafb 20%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.light-theme .hero-title {
    background: linear-gradient(135deg, #0f172a 20%, #475569 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Avatar Card */
.hero-avatar-wrapper {
    flex: 0 0 340px;
}

.avatar-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-card);
}

.avatar-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.25) 0%, transparent 70%);
    z-index: 1;
    pointer-events: none;
}

.avatar-img {
    position: relative;
    z-index: 2;
    width: 190px;
    height: 190px;
    border-radius: 50%;
    border: 4px solid var(--border-color);
    background: var(--bg-secondary);
}

.avatar-badges {
    position: relative;
    z-index: 3;
    margin-top: 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.floating-badge {
    display: inline-block;
    padding: 6px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Sections Common */
.section {
    padding: 60px 0;
}

.section-header {
    margin-bottom: 40px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--accent-blue);
    margin-bottom: 8px;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Education Timeline */
.timeline {
    position: relative;
    border-left: 2px solid var(--border-color);
    padding-left: 32px;
    margin-left: 12px;
}

.timeline-item {
    position: relative;
}

.timeline-dot {
    position: absolute;
    left: -40px;
    top: 24px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-blue);
    box-shadow: 0 0 10px var(--accent-blue);
}

.timeline-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-card);
}

.card-meta {
    display: flex;
    gap: 14px;
    margin-bottom: 14px;
}

.year-badge {
    padding: 4px 10px;
    background: rgba(56, 189, 248, 0.15);
    border-radius: 6px;
    color: var(--accent-blue);
    font-size: 0.85rem;
    font-weight: 600;
}

.location-badge {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.card-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.card-subtitle {
    color: var(--accent-cyan);
    font-weight: 600;
    margin-bottom: 14px;
}

.card-text {
    color: var(--text-secondary);
    margin-bottom: 18px;
}

.edu-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.edu-pill {
    padding: 6px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Skills Tabs & Grid */
.skill-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.skill-tab {
    padding: 9px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.skill-tab:hover, .skill-tab.active {
    background: var(--accent-blue);
    color: #ffffff;
    border-color: var(--accent-blue);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 22px;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.skill-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
}

.skill-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.skill-icon {
    font-size: 1.5rem;
}

.skill-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.skill-detail {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    min-height: 40px;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 3px;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-cyan);
}

.project-badge {
    display: inline-block;
    align-self: flex-start;
    padding: 4px 10px;
    background: rgba(45, 212, 191, 0.12);
    border: 1px solid rgba(45, 212, 191, 0.3);
    border-radius: 6px;
    color: var(--accent-cyan);
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.35;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 18px;
    flex-grow: 1;
}

.project-features {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.feature-item {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.tech-tag {
    padding: 4px 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--accent-blue);
}

.project-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Contacts */
.contacts-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-card);
}

.contacts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 20px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: var(--transition);
}

.contact-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.contact-icon {
    font-size: 1.8rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
}

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

.contact-val {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    margin-top: 60px;
    text-align: center;
}

.footer-content {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-sub {
    font-size: 0.8rem;
    margin-top: 6px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 650px;
    padding: 32px;
    position: relative;
    box-shadow: var(--shadow-card);
    color: var(--text-primary);
}

.close-modal {
    position: absolute;
    right: 20px;
    top: 16px;
    font-size: 1.8rem;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-muted);
}

.close-modal:hover {
    color: var(--accent-blue);
}

.modal-title {
    font-size: 1.4rem;
    margin-bottom: 16px;
    color: var(--accent-blue);
}

.modal-body {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Print Styles */
@media print {
    .navbar, .nav-actions, .hero-cta, .project-links, .skill-tabs, .theme-btn {
        display: none !important;
    }
    body {
        background: #ffffff !important;
        color: #000000 !important;
    }
    .hero-title {
        color: #000000 !important;
        -webkit-text-fill-color: initial !important;
    }
    .avatar-card, .timeline-card, .skill-card, .project-card, .contacts-wrapper, .contact-card {
        border: 1px solid #ccc !important;
        background: #fff !important;
        box-shadow: none !important;
    }
}