:root {
    --bg-body: #000000;
    --bg-card: #1d1d1f;
    --bg-card-hover: #2d2d2f;
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --accent-blue: #2997ff;
    --accent-purple: #bf5af2;
    --accent-gradient: linear-gradient(135deg, #2997ff, #bf5af2);
    --nav-bg: rgba(0, 0, 0, 0.8);
    --border-color: #424245;

    --font-main: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    --max-width: 1200px;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;

    --transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

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

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.display-text {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    line-height: 1.05;
    background: linear-gradient(180deg, #fff, #86868b);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 3rem;
    text-align: center;
}

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

.subtitle {
    font-size: clamp(1.2rem, 2vw, 1.8rem);
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 800px;
    margin: 0 auto 2rem;
    text-align: center;
}

/* Layout */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 8rem 0;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.logo {
    font-weight: 600;
    font-size: 1.2rem;
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding-top: 60px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background: radial-gradient(circle at center, rgba(41, 151, 255, 0.15) 0%, transparent 60%);
    filter: blur(80px);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1);
    }

    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

.cta-button {
    display: inline-block;
    background: var(--text-primary);
    color: var(--bg-body);
    padding: 12px 24px;
    border-radius: 999px;
    font-weight: 500;
    font-size: 1rem;
    margin-top: 2rem;
    transition: transform 0.2s ease;
}

.cta-button:hover {
    transform: scale(1.05);
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.bento-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    transition: var(--transition);
    border: 1px solid transparent;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.bento-card:hover {
    background: var(--bg-card-hover);
    transform: scale(1.02);
    border-color: rgba(255, 255, 255, 0.1);
}

.bento-card.wide {
    grid-column: span 2;
}

@media (max-width: 768px) {
    .bento-card.wide {
        grid-column: span 1;
    }
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--accent-blue);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.card-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* Projects Section (Feature Style) */
.project-feature {
    display: flex;
    align-items: center;
    gap: 4rem;
    margin-bottom: 8rem;
}

.project-feature:nth-child(even) {
    flex-direction: row-reverse;
}

.project-content {
    flex: 1;
}

.project-visual {
    flex: 1;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--bg-body);
    background: linear-gradient(135deg, #2d2d2f, #1d1d1f);
    position: relative;
    overflow: hidden;
}

.project-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, rgba(41, 151, 255, 0.1), transparent);
}

.project-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.tag {
    font-size: 0.8rem;
    padding: 4px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .project-feature {
        flex-direction: column;
        gap: 2rem;
    }

    .project-feature:nth-child(even) {
        flex-direction: column;
    }
}

/* Footer */
footer {
    background: var(--bg-card);
    padding: 4rem 0;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

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

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-icon {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.social-icon:hover {
    color: var(--text-primary);
}

/* Animations */
.fade-in-up {
    animation: fadeInUp 1s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
    opacity: 0;
    transform: translateY(30px);
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.2s;
}

.delay-3 {
    animation-delay: 0.3s;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Distributed Systems Visuals */
.node-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    width: 60%;
    opacity: 0.5;
}

.node {
    width: 100%;
    aspect-ratio: 1;
    background: var(--accent-blue);
    border-radius: 4px;
    animation: blinkNode 3s infinite;
}

@keyframes blinkNode {

    0%,
    100% {
        opacity: 0.3;
    }

    50% {
        opacity: 1;
    }
}

/* Contact Section */
/* Contact Section */
.contact-section {
    padding: 8rem 0;
    background: linear-gradient(180deg, transparent, rgba(41, 151, 255, 0.05));
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    text-align: left;
    height: auto;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    font-size: 1rem;
    color: var(--text-secondary);
}

.contact-list li i {
    font-size: 1.2rem;
    color: var(--accent-blue);
    margin-top: 4px;
    width: 24px;
    text-align: center;
}

.contact-list li div {
    display: flex;
    flex-direction: column;
}

.contact-list .label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 2px;
    opacity: 0.7;
}

.contact-list a {
    color: var(--text-primary);
    transition: color 0.2s ease;
}

.contact-list a:hover {
    color: var(--accent-blue);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
}

.project-link {
    color: inherit;
    text-decoration: none;
    background: linear-gradient(to right, var(--accent-blue), var(--accent-purple));
    background-size: 0% 2px;
    background-repeat: no-repeat;
    background-position: left bottom;
    transition: background-size 0.3s ease;
}

.project-link:hover {
    background-size: 100% 2px;
    color: var(--text-primary);
}