@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,300;0,400;0,500;1,300;1,400&family=Outfit:wght@300;400;500;600;700;800&display=swap');

/* --- CSS Variables & Themes --- */
:root {
    /* Fonts */
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    
    /* Solarized Light Theme (Default) */
    --bg-base: #fdf6e3;
    --bg-surface: #eee8d5;
    --bg-surface-hover: #e4dbbe;
    --border-color: #d5c8a2;
    --text-primary: #586e75;
    --text-muted: #839496;
    --text-headings: #073642;
    --accent-orange: #cb4b16;
    --accent-turquoise: #2aa198;
    --accent-blue: #268bd2;
    --code-bg: #eee8d5;
    --code-color: #dc322f;
    --code-block-bg: #002b36;
    --code-block-color: #93a1a1;
    --shadow-sm: 0 2px 4px rgba(7, 54, 66, 0.05);
    --shadow-md: 0 4px 8px rgba(7, 54, 66, 0.08);
    --transition-speed: 0.25s;
}

[data-theme="dark"] {
    /* Retro Dark Theme */
    --bg-base: #2d241e;
    --bg-surface: #3c3028;
    --bg-surface-hover: #4d3e34;
    --border-color: #554437;
    --text-primary: #ebdccb;
    --text-muted: #af9f91;
    --text-headings: #fcf6ef;
    --accent-orange: #f07b3f;
    --accent-turquoise: #4bc3b5;
    --accent-blue: #4fa5e2;
    --code-bg: #3c3028;
    --code-color: #f67280;
    --code-block-bg: #1c1511;
    --code-block-color: #ebdccb;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.3);
}

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

html, body {
    height: 100%;
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* --- Layout Container --- */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- Header / Top Bar --- */
.top-bar {
    height: 70px;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.blog-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-headings);
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -0.5px;
}

.brand-icon {
    color: var(--accent-orange);
    display: flex;
    align-items: center;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.theme-toggle-btn:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-headings);
}

/* --- Main Layout --- */
.main-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    padding: 48px 24px;
}

.content-inner {
    width: 100%;
    max-width: 800px;
}

/* --- Post Index / Cards --- */
.post-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.post-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s, background-color var(--transition-speed);
}

.post-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.post-card-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.3;
}

.post-card-title a {
    color: var(--text-headings);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: color 0.15s, border-color 0.15s;
}

.post-card-title a:hover {
    color: var(--accent-orange);
    border-color: var(--accent-orange);
}

.post-meta {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.post-meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.post-summary {
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-badge {
    background-color: var(--bg-base);
    color: var(--accent-turquoise);
    font-size: 0.8rem;
    padding: 3px 10px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    font-weight: 500;
    text-transform: lowercase;
}

/* --- Post Article Content --- */
.article-header {
    margin-bottom: 32px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 24px;
}

.article-title {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--text-headings);
    line-height: 1.2;
    margin-bottom: 12px;
    letter-spacing: -1px;
}

article h1 {
    font-size: 2.0rem;
    font-weight: 800;
    color: var(--text-headings);
    margin-top: 36px;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

article h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-headings);
    margin-top: 32px;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 6px;
}

article h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-headings);
    margin-top: 24px;
    margin-bottom: 12px;
}

article p {
    margin-bottom: 18px;
}

article a {
    color: var(--accent-blue);
    text-decoration: none;
    border-bottom: 1px dotted var(--accent-blue);
}

article a:hover {
    color: var(--accent-orange);
    border-bottom-style: solid;
}

article ul, article ol {
    margin-bottom: 20px;
    padding-left: 24px;
}

article li {
    margin-bottom: 6px;
}

article li::marker {
    color: var(--accent-orange);
}

/* Code Formatting */
article code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background-color: var(--bg-surface);
    color: var(--code-color);
    padding: 2px 6px;
    border-radius: 4px;
}

article pre {
    background-color: var(--code-block-bg);
    color: var(--code-block-color);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

article pre code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: 0.9em;
}

/* Tables */
article table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 24px;
    border-radius: 8px;
    overflow: hidden;
}

article th, article td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

article th {
    background-color: var(--bg-surface);
    color: var(--text-headings);
    font-weight: 700;
}

article tr:nth-child(even) td {
    background-color: rgba(238, 232, 213, 0.3);
}

[data-theme="dark"] article tr:nth-child(even) td {
    background-color: rgba(60, 48, 40, 0.3);
}

/* Blockquotes */
article blockquote {
    border-left: 4px solid var(--accent-orange);
    padding: 12px 20px;
    margin: 20px 0;
    font-style: italic;
    background-color: var(--bg-surface);
    border-radius: 0 6px 6px 0;
}

/* Back Button */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--accent-blue);
    font-weight: 500;
    margin-bottom: 24px;
    transition: color 0.2s;
}

.back-btn:hover {
    color: var(--accent-orange);
}

/* --- Mobile / Responsive --- */
@media (max-width: 600px) {
    .top-bar {
        padding: 0 16px;
    }
    .main-wrapper {
        padding: 24px 16px;
    }
    .article-title {
        font-size: 1.8rem;
    }
    .post-card {
        padding: 16px;
    }
}