/* Modern minimalist design */
:root {
    --color-bg: #ffffff;
    --color-surface: #fafafa;
    --color-primary: #0052ff;
    --color-primary-dark: #003ecc;
    --color-text: #0a0a0a;
    --color-muted: #666666;
    --color-border: #e0e0e0;
    --radius: 12px;
    --transition: 0.3s ease;
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
    --font-mono: 'SF Mono', Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
    --max-width: 1200px;
    --spacing: 2rem;
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--color-primary-dark);
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing);
}

/* Header */
header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: 4.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
header .logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-primary);
}
header nav ul {
    display: flex;
    gap: 2rem;
    list-style: none;
}
header nav ul li a {
    font-weight: 500;
    color: var(--color-muted);
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}
header nav ul li a:hover,
header nav ul li a.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}
.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

/* Hero */
.hero {
    display: flex;
    align-items: center;
    min-height: 80vh;
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, var(--color-surface) 0%, transparent 70%);
    opacity: 0.1;
    z-index: 0;
}
.hero-content {
    flex: 1;
    position: relative;
    z-index: 2;
    animation: fadeInLeft 0.8s ease-out;
    max-width: 500px;
}
.hero-content h1 {
    font-size: 2.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-content p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.7;
}
.hero-buttons .btn {
    margin-right: 1rem;
}
.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 2;
    animation: fadeInRight 0.8s ease-out;
}
.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    animation: float 6s ease-in-out infinite;
}

/* Stats */
.stats {
    background: var(--color-surface);
    padding: var(--spacing) 0;
}
.stats .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}
.stat-item {
    background: var(--color-bg);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    transition: var(--transition);
}
.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    display: block;
    margin-bottom: 0.5rem;
}
.stat-label {
    font-size: 1rem;
    color: var(--color-muted);
}

/* Section title */
.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    position: relative;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    border-radius: 2px;
}

/* Portfolio */
.portfolio {
    background: var(--color-bg);
    padding: var(--spacing) 0;
}
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}
.portfolio-item {
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    transition: var(--transition);
    position: relative;
}
.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.portfolio-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}
.portfolio-item:hover img {
    transform: scale(1.05);
}
.portfolio-content {
    padding: 1.5rem;
}
.portfolio-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}
.portfolio-content p {
    font-size: 0.95rem;
    color: var(--color-muted);
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}
.portfolio-tags span {
    background: var(--color-primary);
    color: #fff;
    padding: 0.25rem 0.6rem;
    border-radius: 1rem;
    font-size: 0.85rem;
}

/* Blog */
.blog {
    background: var(--color-surface);
    padding: var(--spacing) 0;
}
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.blog-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}
.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.blog-card-img {
    height: 180px;
    overflow: hidden;
}
.blog-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}
.blog-card:hover .blog-card-img img {
    transform: scale(1.05);
}
.blog-card-content {
    flex: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}
.blog-card-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--color-text);
    flex-grow: 1;
}
.blog-card-content .meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--color-muted);
    margin-top: auto;
}
.blog-card-content .meta a {
    color: var(--color-muted);
}
.blog-card-content .meta a:hover {
    color: var(--color-primary);
}

/* About */
.about {
    background: var(--color-bg);
    padding: var(--spacing) 0;
}
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}
.about-text h2 {
    margin-bottom: 1.5rem;
}
.about-text p {
    margin-bottom: 1rem;
    line-height: 1.8;
}
.about-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}
.about-skills span {
    background: var(--color-primary);
    color: #fff;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
}

/* Contact */
.contact {
    background: var(--color-surface);
    padding: var(--spacing) 0;
}
.contact-content {
    max-width: 600px;
    margin: 0 auto;
}
.contact-content h2 {
    margin-bottom: 2rem;
}
.contact-form {
    display: grid;
    gap: 1.5rem;
}
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: var(--transition);
}
.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0,82,255,0.25);
}
.contact-form textarea {
    min-height: 150px;
    resize: vertical;
}
.btn {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}
.btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}
.btn-secondary {
    background: var(--color-border);
    color: var(--color-text);
}
.btn-secondary:hover {
    background: var(--color-muted);
}
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Footer */
footer {
    background: var(--color-muted);
    color: #fff;
    text-align: center;
    padding: 2rem 0;
    font-size: 0.9rem;
}
footer a {
    color: #fff;
    opacity: 0.8;
}
footer a:hover {
    opacity: 1;
}

/* Posts styling */
.posts-list {
    list-style: none;
    padding: 0;
}
.posts-list li {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}
.posts-list li:last-child {
    border-bottom: none;
}
.post-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}
.post-meta {
    font-size: 0.875rem;
    color: var(--color-muted);
    margin-bottom: 1rem;
}
.post-excerpt {
    margin-bottom: 1.5rem;
    line-height: 1.7;
}
.read-more {
    color: var(--color-primary);
    font-weight: 600;
}
.read-more:hover {
    text-decoration: underline;
}

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(30px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes float {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(-1000px) rotate(360deg); }
}

/* Responsive */
@media (max-width: 768px) {
    header { height: 3.5rem; }
    header .logo { font-size: 1.1rem; }
    header nav ul { display: none; }
    .mobile-toggle { display: flex; }
    .hero { flex-direction: column; text-align: center; }
    .hero-content, .hero-image { flex: none; width: 100%; }
    .hero-content h1 { font-size: 2.2rem; }
    .about-content { grid-template-columns: 1fr; text-align: center; }
}

/* Dark/Light toggle (simple class toggle on body) */
body.dark {
    --color-bg: #0a0a0a;
    --color-surface: #111111;
    --color-text: #e0e0e0;
    --color-muted: #aaa;
    --color-border: #444;
}
body.dark header { background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
body.dark .stat-item { background: var(--color-surface); }
body.dark .portfolio-item { background: var(--color-surface); }
body.dark .blog-card { background: var(--color-surface); }
body.dark .about-text { color: var(--color-text); }
body.dark .contact-form input,
body.dark .contact-form textarea { background: var(--color-surface); border-color: var(--color-border); color: var(--color-text); }
body.dark footer { background: var(--color-muted); }