:root {
    --bg-primary: #fafafa;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #eeeeee;
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-tertiary: #9e9e9e;
    --border-color: #e0e0e0;
    --accent-color: #424242;
    --hover-color: #616161;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-tertiary: #666666;
    --border-color: #333333;
    --accent-color: #e0e0e0;
    --hover-color: #ffffff;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(var(--bg-primary), 0.8);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

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

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

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--bg-secondary);
    color: var(--hover-color);
}

.hero-section {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 4rem;
    align-items: center;
    padding: 6rem 0;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 2rem;
    padding-right: 2rem;
}

.hero-content h1 {
    font-size: clamp(3.5rem, 6.5vw, 5.5rem);
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
    transition: var(--transition);
    cursor: default;
    font-family: 'Old Standard TT', cursive;
}

.hero-title span {
    display: inline-block;
    transform: translateY(0);
    transition: transform 280ms ease;
    background: linear-gradient(45deg, var(--text-primary), var(--text-secondary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-title:hover span {
    transform: translateY(-5px);
    transition-delay: calc(var(--i) * 40ms);
}

.hero-content p {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.hero-description p {
    font-size: 1.00rem;
    font-weight: 300;
    color: var(--text-tertiary);
}

.profile-section {
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-image {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    object-fit: cover;
    /* filter: grayscale(100%) contrast(1.1); */
    border: 3px solid var(--border-color);
    transition: var(--transition);
}

.profile-image:hover {
    transform: scale(1.05);
    border-color: var(--hover-color);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 2rem;
}



.blog-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    transition: var(--transition);
    cursor: pointer;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border-color: var(--hover-color);
}

.blog-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.blog-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.blog-author {
    color: var(--text-tertiary);
    margin-bottom: 0.5rem;
    line-height: 1.1;
    font-size: 0.875rem;
    font-weight: 300;
}

.blog-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.tag {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.footer {
    margin-top: 6rem;
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.social-links a {
    color: var(--text-secondary);
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--hover-color);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .hero-section {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .profile-image {
        width: 150px;
        height: 150px;
    }

    .blog-grid {
        grid-template-columns: 1fr;
        padding: 0 1rem;
    }

    .container {
        padding: 0 1rem;
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.6s ease-out forwards;
}

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