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

:root {
    --primary-color: #0a0e27;
    --secondary-color: #1a1f3a;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --text-color: #e5e7eb;
    --text-muted: #9ca3af;
    --border-color: #374151;
    --success-color: #10b981;
}

html {
    scroll-behavior: smooth;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--accent-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 200px 0 100px;
    text-align: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -50%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    animation: float 8s ease-in-out infinite reverse;
}

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

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

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

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

.hero-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

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

/* About Section */
.about {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #0a0e27 100%);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
}

.about h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
    background: linear-gradient(135deg, #fff 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.about h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), #60a5fa);
    margin: 1rem auto 3rem;
    border-radius: 2px;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    background: rgba(26, 31, 58, 0.5);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid rgba(59, 130, 246, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.about-content:hover {
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.15),
                0 0 60px rgba(59, 130, 246, 0.05);
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.about-text h3 {
    font-size: 1.3rem;
    margin-top: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-weight: 600;
    position: relative;
    padding-left: 1rem;
}

.about-text h3::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

.strengths-list {
    list-style: none;
    margin-bottom: 2rem;
    display: grid;
    gap: 0.5rem;
}

.strengths-list li {
    padding: 0.75rem 1rem;
    padding-left: 2.5rem;
    position: relative;
    color: var(--text-muted);
    background: rgba(10, 14, 39, 0.5);
    border-radius: 8px;
    border: 1px solid rgba(59, 130, 246, 0.1);
    transition: all 0.3s ease;
    line-height: 1.6;
}

.strengths-list li:hover {
    background: rgba(59, 130, 246, 0.05);
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateX(5px);
}

.strengths-list li::before {
    content: '✓';
    position: absolute;
    left: 0.75rem;
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Skills Section */
.skills {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--secondary-color) 0%, #0f1628 100%);
    position: relative;
    overflow: hidden;
}

.skills::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
}

.skills h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
    background: linear-gradient(135deg, #fff 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.skills h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), #60a5fa);
    margin: 1rem auto 3rem;
    border-radius: 2px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.skill-category {
    background: rgba(26, 31, 58, 0.5);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid rgba(59, 130, 246, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.skill-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), #60a5fa, #3b82f6);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.skill-category:hover::before {
    transform: scaleX(1);
}

.skill-category:hover {
    border-color: rgba(59, 130, 246, 0.4);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.2),
                0 0 60px rgba(59, 130, 246, 0.1);
}

.skill-category h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-weight: 600;
    position: relative;
    padding-left: 1rem;
}

.skill-category h3::before {
    content: '▸';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--accent-color);
    font-weight: bold;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: translateX(0);
    }
    50% {
        opacity: 0.6;
        transform: translateX(3px);
    }
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(10, 14, 39, 0.8) 0%, rgba(26, 31, 58, 0.8) 100%);
    color: var(--text-color);
    padding: 0.1rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(59, 130, 246, 0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: default;
    position: relative;
    overflow: hidden;
}

.tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.3), transparent);
    transition: left 0.5s ease;
}

.tag:hover::before {
    left: 100%;
}

.tag:hover {
    background: linear-gradient(135deg, var(--accent-color) 0%, #2563eb 100%);
    color: white;
    border-color: var(--accent-color);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 16px rgba(59, 130, 246, 0.4),
                0 0 20px rgba(59, 130, 246, 0.2);
}

/* Projects Section */
.projects {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, #0a0e27 100%);
    position: relative;
    overflow: hidden;
}

.projects::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
}

.projects h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
    background: linear-gradient(135deg, #fff 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.projects h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), #60a5fa);
    margin: 1rem auto 3rem;
    border-radius: 2px;
}

.projects-grid {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    padding-left: 40px;
}

/* Timeline line */
.projects-grid::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-color), rgba(59, 130, 246, 0.2));
}

.project-card {
    background: rgba(26, 31, 58, 0.5);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid rgba(59, 130, 246, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    margin-bottom: 3rem;
    margin-left: 30px;
}

/* Timeline dot */
.project-card::before {
    content: '';
    position: absolute;
    left: -42px;
    top: 1.4rem;
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
    transition: all 0.4s ease;
}

/* Timeline connector line */
.project-card::after {
    content: '';
    position: absolute;
    left: -26px;
    top: 2rem;
    width: 26px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-color), rgba(59, 130, 246, 0.3));
    transition: all 0.4s ease;
}

.project-card:hover::before {
    background: #60a5fa;
    box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.4), 0 0 20px rgba(59, 130, 246, 0.6);
    transform: scale(1.3);
}

.project-card:hover::after {
    background: linear-gradient(90deg, #60a5fa, rgba(59, 130, 246, 0.6));
}

.project-card:hover {
    border-color: rgba(59, 130, 246, 0.4);
    transform: translateX(10px);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.2),
                0 0 60px rgba(59, 130, 246, 0.1);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.project-header h3 {
    font-size: 1.3rem;
    margin: 0;
    color: var(--text-color);
    font-weight: 600;
    flex: 1;
}

.project-year {
    color: var(--accent-color);
    font-size: 0.9rem;
    font-weight: 600;
    background: rgba(59, 130, 246, 0.1);
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    border: 1px solid rgba(59, 130, 246, 0.2);
    white-space: nowrap;
}

.project-description {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    list-style: none;
    padding-left: 0;
}

.project-description li {
    padding: 0.4rem 0;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
    font-size: 0.95rem;
}

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

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

.project-tech span {
    display: inline-flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(10, 14, 39, 0.8) 0%, rgba(26, 31, 58, 0.8) 100%);
    color: var(--text-color);
    padding: 0.4rem 0.85rem;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(59, 130, 246, 0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-tech span:hover {
    background: linear-gradient(135deg, var(--accent-color) 0%, #2563eb 100%);
    color: white;
    border-color: var(--accent-color);
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background: var(--secondary-color);
}

.contact h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.contact-intro {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info h3,
.contact-links h3 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

.contact-info p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.contact-info a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-info a:hover {
    color: var(--accent-hover);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--primary-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    border-color: var(--accent-color);
    background: rgba(59, 130, 246, 0.1);
}

.link-label {
    font-weight: 600;
}

.link-arrow {
    color: var(--accent-color);
    transition: transform 0.3s ease;
}

.social-link:hover .link-arrow {
    transform: translateX(5px);
}

/* Footer */
.footer {
    background: var(--primary-color);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
    }

    .hero {
        padding: 150px 0 80px;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 250px;
    }

    .hero-links {
        gap: 1rem;
    }

    .about h2,
    .skills h2,
    .projects h2,
    .contact h2 {
        font-size: 2rem;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        padding-left: 30px;
    }

    .projects-grid::before {
        left: 15px;
    }

    .project-card {
        margin-left: 20px;
    }

    .project-card::before {
        left: -32px;
        width: 12px;
        height: 12px;
    }

    .project-card::after {
        left: -20px;
        width: 20px;
    }

    .project-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .nav-menu {
        gap: 0.5rem;
        font-size: 0.85rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .about h2,
    .skills h2,
    .projects h2,
    .contact h2 {
        font-size: 1.5rem;
    }

    .hero-links {
        flex-direction: column;
        gap: 0.5rem;
    }

    .hero-links a {
        font-size: 0.85rem;
    }

    .projects-grid {
        padding-left: 20px;
    }

    .projects-grid::before {
        left: 10px;
    }

    .project-card {
        margin-left: 15px;
        padding: 1.5rem;
    }

    .project-card::before {
        left: -22px;
        width: 10px;
        height: 10px;
    }

    .project-card::after {
        left: -12px;
        width: 12px;
    }
}