/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --text-color: #1e293b;
    --text-light: #64748b;
    --bg-color: #ffffff;
    --bg-light: #f8fafc;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header & Navigation */
.header {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.nav-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: 0.3s;
    border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Main Content */
.main {
    margin-top: 80px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--bg-light) 0%, var(--bg-color) 100%);
    padding: 6rem 0;
    text-align: center;
}

.hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-color);
}

/* Skills Section */
.skills {
    background: var(--bg-light);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.skill-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Blog Section */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.blog-card {
    background: var(--bg-color);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.blog-card {
    padding: 2rem;
}

.blog-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.blog-category {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.blog-date {
    color: var(--text-light);
    font-size: 0.875rem;
}

.blog-title {
    margin-bottom: 1rem;
}

.blog-title a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 1.25rem;
    font-weight: 600;
    transition: color 0.3s ease;
}

.blog-title a:hover {
    color: var(--primary-color);
}

.blog-excerpt {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.read-more:hover {
    color: var(--primary-dark);
}

/* About Section */
.about {
    background: var(--bg-light);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* Footer */
.footer {
    background: var(--text-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer-content p {
    margin-bottom: 0.5rem;
}

.icp-info {
    font-size: 0.875rem;
    opacity: 0.8;
}

.icp-info a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.icp-info a:hover {
    opacity: 0.7;
}

/* Article Styles */
.article-header {
    text-align: center;
    padding: 4rem 0 2rem;
    background: var(--bg-light);
}

.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.article-meta {
    color: var(--text-light);
    font-size: 1rem;
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 1rem;
}

.article-content h2 {
    font-size: 2rem;
    margin: 2rem 0 1rem;
    color: var(--text-color);
}

.article-content h3 {
    font-size: 1.5rem;
    margin: 1.5rem 0 1rem;
    color: var(--text-color);
}

.article-content p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
    color: var(--text-light);
}

.article-content code {
    background: var(--bg-light);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: "Monaco", "Consolas", monospace;
    font-size: 0.9rem;
}

.article-content pre {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 1.5rem 0;
}

.article-content pre code {
    background: none;
    padding: 0;
}

.back-link {
    display: inline-block;
    margin-top: 2rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-color);
        flex-direction: column;
        padding: 1rem;
        border-top: 1px solid var(--border-color);
        box-shadow: var(--shadow);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .article-title {
        font-size: 2rem;
    }

    .article-content h2 {
        font-size: 1.5rem;
    }

    section {
        padding: 3rem 0;
    }

    .hero {
        padding: 4rem 0;
    }
}