/* ============================================
   Edition-X — Professional Blog Theme
   ============================================ */

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

:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-bg-dark: #0f172a;
    --color-bg-dark-alt: #1e293b;
    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-light: #94a3b8;
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-accent-subtle: #eff6ff;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-code-bg: #f1f5f9;
    --color-code-text: #0f172a;
    --color-success: #10b981;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: 'JetBrains Mono', "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --font-serif: 'Georgia', 'Times New Roman', serif;
    --line-height: 1.7;
    --max-width: 720px;
    --max-width-wide: 1080px;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --transition: 0.2s ease;
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: var(--line-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Layout
   ============================================ */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.container-wide {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Header
   ============================================ */
.site-header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.92);
}

.site-header .container-wide {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.site-title {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
}

.site-title a {
    color: var(--color-text);
    text-decoration: none;
    border-bottom: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.site-title a:hover {
    color: var(--color-accent);
}

.site-title .logo-mark {
    display: block;
    width: 32px;
    height: 32px;
    object-fit: contain;
    flex-shrink: 0;
}

.site-title .wordmark {
    display: block;
    height: 32px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.site-nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-bottom: none;
    transition: color var(--transition);
    position: relative;
}

.site-nav a:hover,
.site-nav a.active {
    color: var(--color-text);
}

.site-nav a::after {
    content: '';
    position: absolute;
    bottom: -22px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transition: transform var(--transition);
}

.site-nav a:hover::after,
.site-nav a.active::after {
    transform: scaleX(1);
}

/* ============================================
   Main Content
   ============================================ */
main {
    min-height: calc(100vh - 200px);
    padding: 48px 0 80px;
}

/* ============================================
   Hero / Homepage
   ============================================ */
.hero {
    padding: 60px 0 48px;
}

.hero-content {
    display: flex;
    align-items: flex-start;
    gap: 40px;
}

.hero-text {
    flex: 1;
}

.hero-avatar {
    flex-shrink: 0;
}

.hero-avatar img {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

.hero-greeting {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}

.hero-title {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--color-text);
    margin: 0 0 20px 0;
}

.hero-description {
    font-size: 18px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
    max-width: 540px;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    background: var(--color-bg-alt);
    color: var(--color-text-secondary);
    font-size: 13px;
    font-weight: 500;
    border-radius: 20px;
    border: 1px solid var(--color-border);
    text-decoration: none;
    transition: all var(--transition);
}

.hero-tag:hover {
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    border-color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.hero-links {
    display: flex;
    gap: 16px;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius);
    text-decoration: none;
    border-bottom: none;
    transition: all var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: var(--color-text);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-bg-dark-alt);
    border-bottom-color: transparent;
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-alt);
    color: var(--color-text);
    border-color: var(--color-text-light);
    border-bottom-color: var(--color-text-light);
}

/* ============================================
   Section Headers
   ============================================ */
.section {
    padding: 48px 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
}

.section-title {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
}

.section-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.section-link:hover {
    color: var(--color-accent-hover);
}

.section-link::after {
    content: '\2192';
}

.section-divider {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: 0;
}

/* ============================================
   Post Cards (Blog listing & Homepage)
   ============================================ */
.post-card {
    padding: 28px 0;
    border-bottom: 1px solid var(--color-border-light);
    transition: all var(--transition);
}

.post-card:last-child {
    border-bottom: none;
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.post-card-date {
    font-size: 13px;
    color: var(--color-text-light);
    font-weight: 500;
}

.post-card-tag {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-accent);
    background: var(--color-accent-subtle);
    padding: 2px 10px;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.post-card h2 {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.35;
    margin: 0 0 8px 0;
    letter-spacing: -0.01em;
}

.post-card h2 a {
    color: var(--color-text);
    text-decoration: none;
    border-bottom: none;
    transition: color var(--transition);
}

.post-card h2 a:hover {
    color: var(--color-accent);
}

.post-card-excerpt {
    font-size: 15px;
    line-height: 1.65;
    color: var(--color-text-secondary);
    margin: 0;
}

.post-card-read-more {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: none;
}

.post-card-read-more:hover {
    color: var(--color-accent-hover);
}

.post-card-read-more::after {
    content: '\2192';
    transition: transform var(--transition);
}

.post-card-read-more:hover::after {
    transform: translateX(3px);
}

/* ============================================
   Blog Page
   ============================================ */
.page-header {
    padding-bottom: 32px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--color-border);
}

.page-title {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0 0 8px 0;
}

.page-description {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin: 0;
}

/* ============================================
   Single Post / Article
   ============================================ */
.post-header {
    margin-bottom: 48px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--color-border-light);
}

.post-header .post-card-meta {
    margin-bottom: 16px;
}

.post-title {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin: 0 0 16px 0;
    color: var(--color-text);
}

.post-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.post-meta {
    color: var(--color-text-light);
    font-size: 14px;
    font-weight: 500;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 16px;
}

.post-tag {
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-alt);
    padding: 4px 12px;
    border-radius: 14px;
    border: 1px solid var(--color-border);
    text-decoration: none;
}

/* Post Content */
.post-content {
    font-size: 17px;
    line-height: 1.8;
    color: var(--color-text);
}

.post-content h2 {
    font-size: 26px;
    font-weight: 700;
    margin-top: 48px;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    padding-top: 16px;
}

.post-content h3 {
    font-size: 20px;
    font-weight: 700;
    margin-top: 36px;
    margin-bottom: 12px;
}

.post-content p {
    margin-bottom: 20px;
}

.post-content ul,
.post-content ol {
    margin-left: 24px;
    margin-bottom: 20px;
}

.post-content li {
    margin-bottom: 8px;
    line-height: 1.7;
}

.post-content strong {
    font-weight: 600;
    color: var(--color-text);
}

.post-content em {
    font-style: italic;
}

.post-content hr {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: 48px 0;
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    margin: 24px 0;
}

/* Post footer */
.post-footer {
    margin-top: 64px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
}

.post-nav {
    display: flex;
    justify-content: space-between;
}

/* ============================================
   About Page
   ============================================ */
.about-header {
    display: flex;
    align-items: flex-start;
    gap: 36px;
    margin-bottom: 40px;
}

.about-avatar img {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

.about-intro {
    flex: 1;
}

.about-intro h1 {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0 0 8px 0;
}

.about-intro .about-role {
    font-size: 17px;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 16px;
}

.about-intro p {
    color: var(--color-text-secondary);
    font-size: 16px;
    line-height: 1.7;
}

.about-content {
    font-size: 16px;
    line-height: 1.8;
}

.about-content h2 {
    font-size: 22px;
    font-weight: 700;
    margin-top: 40px;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.about-content p {
    margin-bottom: 16px;
    color: var(--color-text);
}

.about-content ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.about-content li {
    margin-bottom: 8px;
    color: var(--color-text);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 24px 0 32px;
}

.skill-category {
    padding: 20px;
    background: var(--color-bg-alt);
    border-radius: var(--radius);
    border: 1px solid var(--color-border-light);
}

.skill-category h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin: 0 0 12px 0;
}

.skill-category p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin: 0;
}

.connect-links {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.connect-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-decoration: none;
    transition: all var(--transition);
}

.connect-link:hover {
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    border-color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

/* ============================================
   Typography (general)
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

p {
    margin-bottom: 16px;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
}

a:hover {
    color: var(--color-accent-hover);
    border-bottom-color: var(--color-accent);
}

blockquote {
    border-left: 3px solid var(--color-accent);
    padding: 16px 20px;
    margin: 24px 0;
    background: var(--color-bg-alt);
    border-radius: 0 var(--radius) var(--radius) 0;
    color: var(--color-text-secondary);
    font-style: italic;
    font-size: 16px;
}

blockquote p:last-child {
    margin-bottom: 0;
}

/* ============================================
   Code
   ============================================ */
code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background-color: var(--color-code-bg);
    color: var(--color-code-text);
    padding: 3px 7px;
    border-radius: 4px;
}

pre {
    background-color: var(--color-bg-dark);
    color: #e2e8f0;
    padding: 20px 24px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 24px 0;
    line-height: 1.6;
    box-shadow: var(--shadow-md);
}

pre code {
    background-color: transparent;
    color: inherit;
    padding: 0;
    border-radius: 0;
    font-size: 14px;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 40px 0;
}

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

.footer-copyright {
    font-size: 13px;
    color: var(--color-text-light);
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    font-size: 13px;
    color: var(--color-text-light);
    text-decoration: none;
    border-bottom: none;
    transition: color var(--transition);
}

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

/* ============================================
   Utilities
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 1000;
    padding: 8px 16px;
    background: var(--color-bg-dark);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius);
    text-decoration: none;
    border-bottom: none;
    transition: top var(--transition);
}

.skip-link:focus {
    top: 8px;
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-bottom: none;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .hero-content {
        flex-direction: column-reverse;
        align-items: center;
        text-align: center;
    }

    .hero-avatar img {
        width: 120px;
        height: 120px;
    }

    .hero-title {
        font-size: 30px;
    }

    .hero-description {
        font-size: 16px;
    }

    .hero-tags {
        justify-content: center;
    }

    .hero-links {
        justify-content: center;
    }

    .about-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .about-avatar img {
        width: 120px;
        height: 120px;
    }

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

    .connect-links {
        justify-content: center;
    }

    .post-title {
        font-size: 28px;
    }

    .page-title {
        font-size: 26px;
    }

    .footer-content {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .site-nav {
        gap: 20px;
    }

    .site-nav a {
        font-size: 13px;
    }

    .hero-title {
        font-size: 26px;
    }

    .hero-links {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}