:root {
    --color-primary: #007AFF;
    --color-secondary: #5856D6;
    --color-accent: #FF9500;
    --color-text: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-background: #fbfbfd;
    --color-surface: #ffffff;
    --color-border: rgba(0, 0, 0, 0.08);

    --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.1);

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-background);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

.cursor-glow {
    position: fixed;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: opacity var(--transition-base);
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(251, 251, 253, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transition: width var(--transition-base);
}

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

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

.github-link {
    color: var(--color-text);
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.github-link:hover {
    color: var(--color-primary);
    transform: scale(1.1);
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero-content {
    text-align: center;
    z-index: 10;
    max-width: 800px;
}

.hero-title {
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s ease forwards;
}

.title-line:nth-child(2) {
    animation-delay: 0.2s;
}

.title-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 3s ease infinite, slideUp 0.8s ease 0.2s forwards;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

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

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    opacity: 0;
    animation: slideUp 0.8s ease 0.4s forwards;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--color-text-secondary);
    opacity: 0;
    animation: slideUp 0.8s ease 0.6s forwards;
}

.hero-scroll {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    opacity: 0;
    animation: slideUp 0.8s ease 0.8s forwards;
}

.hero-scroll span {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-text-secondary);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: scrollBounce 2s ease infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(12px); opacity: 0.5; }
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: float 8s ease-in-out infinite;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.4), transparent 70%);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(88, 86, 214, 0.3), transparent 70%);
    top: 50%;
    right: 10%;
    animation-delay: 2s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(255, 149, 0, 0.3), transparent 70%);
    bottom: 10%;
    left: 30%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(30px, -30px); }
    66% { transform: translate(-20px, 20px); }
}

.section {
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(0, 122, 255, 0.1);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--color-text), var(--color-text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.blog-section {
    background: linear-gradient(180deg, var(--color-background) 0%, rgba(0, 122, 255, 0.02) 100%);
}

.blog-stream {
    max-width: 900px;
    margin: 0 auto;
}

.blog-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
}

.blog-item:last-child {
    border-bottom: none;
}

.blog-item.featured {
    padding: var(--spacing-lg) 0;
}

.blog-item.featured .blog-number {
    font-size: 4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.blog-item:hover {
    transform: translateX(8px);
}

.blog-item:hover .blog-number {
    transform: scale(1.1);
}

.blog-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0.3;
    transition: all var(--transition-base);
    min-width: 80px;
}

.blog-content {
    flex: 1;
}

.blog-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.blog-content p {
    color: var(--color-text-secondary);
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.arrow-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.arrow-link:hover {
    gap: 1rem;
}

.arrow-link svg {
    transition: transform var(--transition-fast);
}

.arrow-link:hover svg {
    transform: translateX(4px);
}

.projects-section {
    background: linear-gradient(180deg, var(--color-background) 0%, rgba(88, 86, 214, 0.02) 100%);
}

.projects-list {
    max-width: 1200px;
    margin: 0 auto;
}

.project-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    transform: translateY(40px);
    transition: all var(--transition-slow);
}

.project-row.visible {
    opacity: 1;
    transform: translateY(0);
}

.project-row.featured {
    min-height: 400px;
}

.project-row:nth-child(even) .project-visual {
    order: 2;
}

.project-row:nth-child(even) .project-info {
    order: 1;
}

.project-visual {
    width: 100%;
    height: 400px;
    overflow: hidden;
    border-radius: var(--radius-xl);
    position: relative;
}

.project-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-row:hover .project-visual img {
    transform: scale(1.05);
}

.project-info {
    padding: var(--spacing-md);
}

.project-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    margin-bottom: var(--spacing-sm);
}

.project-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-text), var(--color-text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.project-info p {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.project-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    text-decoration: none;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    background: var(--color-surface);
}

.project-item:hover {
    transform: translateX(8px);
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-md);
}

.project-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-secondary);
    opacity: 0.5;
    min-width: 60px;
}

.project-text h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.project-text p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.learning-section {
    background: linear-gradient(180deg, var(--color-background) 0%, rgba(255, 149, 0, 0.02) 100%);
    overflow: hidden;
}

.learning-stream {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
    animation: floatPills 20s ease-in-out infinite;
}

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

.learning-pill {
    padding: 1.2rem 2rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    text-decoration: none;
    color: var(--color-text);
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    animation: pillFloat 6s ease-in-out infinite;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.learning-pill::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.learning-pill:hover::before {
    left: 100%;
}

.learning-pill:nth-child(1) {
    animation-delay: 0s;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.6), rgba(255, 142, 142, 0.6));
    border-color: rgba(255, 107, 107, 0.8);
    color: white;
}

.learning-pill:nth-child(2) {
    animation-delay: 0.5s;
    background: linear-gradient(135deg, rgba(78, 205, 196, 0.6), rgba(68, 160, 141, 0.6));
    border-color: rgba(78, 205, 196, 0.8);
    color: white;
}

.learning-pill:nth-child(3) {
    animation-delay: 1s;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.6), rgba(118, 75, 162, 0.6));
    border-color: rgba(102, 126, 234, 0.8);
    color: white;
}

.learning-pill:nth-child(4) {
    animation-delay: 1.5s;
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.6), rgba(255, 152, 0, 0.6));
    border-color: rgba(255, 193, 7, 0.8);
    color: white;
}

.learning-pill:nth-child(5) {
    animation-delay: 2s;
    background: linear-gradient(135deg, rgba(156, 39, 176, 0.6), rgba(123, 31, 162, 0.6));
    border-color: rgba(156, 39, 176, 0.8);
    color: white;
}

.learning-pill:nth-child(6) {
    animation-delay: 2.5s;
    background: linear-gradient(135deg, rgba(0, 188, 212, 0.6), rgba(0, 151, 167, 0.6));
    border-color: rgba(0, 188, 212, 0.8);
    color: white;
}

.learning-pill:nth-child(7) {
    animation-delay: 3s;
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.6), rgba(56, 142, 60, 0.6));
    border-color: rgba(76, 175, 80, 0.8);
    color: white;
}

.learning-pill:nth-child(8) {
    animation-delay: 3.5s;
    background: linear-gradient(135deg, rgba(255, 87, 34, 0.6), rgba(230, 74, 25, 0.6));
    border-color: rgba(255, 87, 34, 0.8);
    color: white;
}

.learning-pill:nth-child(9) {
    animation-delay: 4s;
    background: linear-gradient(135deg, rgba(63, 81, 181, 0.6), rgba(48, 63, 159, 0.6));
    border-color: rgba(63, 81, 181, 0.8);
    color: white;
}

.learning-pill:nth-child(10) {
    animation-delay: 4.5s;
    background: linear-gradient(135deg, rgba(255, 112, 67, 0.6), rgba(255, 138, 101, 0.6));
    border-color: rgba(255, 112, 67, 0.8);
    color: white;
}

.learning-pill:nth-child(11) {
    animation-delay: 5s;
    background: linear-gradient(135deg, rgba(121, 85, 72, 0.6), rgba(141, 110, 99, 0.6));
    border-color: rgba(121, 85, 72, 0.8);
    color: white;
}

.learning-pill:nth-child(12) {
    animation-delay: 5.5s;
    background: linear-gradient(135deg, rgba(38, 198, 218, 0.6), rgba(0, 188, 212, 0.6));
    border-color: rgba(38, 198, 218, 0.8);
    color: white;
}

.learning-pill:nth-child(13) {
    animation-delay: 6s;
    background: linear-gradient(135deg, rgba(244, 67, 54, 0.6), rgba(229, 57, 53, 0.6));
    border-color: rgba(244, 67, 54, 0.8);
    color: white;
}

.learning-pill:nth-child(14) {
    animation-delay: 6.5s;
    background: linear-gradient(135deg, rgba(103, 58, 183, 0.6), rgba(94, 53, 177, 0.6));
    border-color: rgba(103, 58, 183, 0.8);
    color: white;
}

.learning-pill:hover {
    transform: scale(1.15) translateY(-12px) rotate(5deg);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

@keyframes pillFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-10px) rotate(2deg);
    }
    75% {
        transform: translateY(5px) rotate(-1deg);
    }
}

.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-md);
    text-align: center;
}

.footer p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

@media (max-width: 768px) {
    .navbar {
        padding: var(--spacing-sm);
    }

    .nav-links {
        gap: var(--spacing-sm);
    }

    .nav-link {
        font-size: 0.8rem;
    }

    .hero {
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .blog-item {
        flex-direction: column;
        text-align: center;
    }

    .blog-number {
        min-width: auto;
    }

    .project-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .project-row:nth-child(even) .project-visual {
        order: 1;
    }

    .project-row:nth-child(even) .project-info {
        order: 2;
    }

    .project-visual {
        height: 250px;
    }

    .project-info h3 {
        font-size: 1.5rem;
    }

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

    .learning-cloud {
        gap: var(--spacing-sm);
    }

    .learning-tag {
        font-size: 0.9rem;
        padding: 0.6rem 1.2rem;
    }

    .learning-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}