/* ==========================================================================
   Sparrowhawk - Cozy Firelight Dark Theme
   A warm reading experience by the hearth
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
    /* Colors - Warm firelight palette */
    --bg-primary: #1a1612;
    --bg-secondary: #241f1a;
    --bg-tertiary: #2e2620;
    --text-primary: #e8dcc8;
    --text-secondary: #b8a892;
    --text-muted: #7d6f5e;
    --accent: #d4a459;
    --accent-hover: #e6b86a;
    --border: #3d342a;
    --tag-bg: #2e2620;
    --tag-text: #b8a892;
    --code-bg: #1f1a16;
    --blockquote-border: #8c6d3f;

    /* Typography - Literary serifs */
    --font-body: Georgia, 'Palatino Linotype', Palatino, 'Book Antiqua', serif;
    --font-heading: 'Palatino Linotype', Palatino, Georgia, 'Book Antiqua', serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    --font-size-base: 18px;
    --line-height: 1.8;

    /* Spacing */
    --content-width: 720px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    /* Effects */
    --radius: 8px;
    --glow-ember: 0 0 12px rgba(212, 164, 89, 0.3);
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: var(--line-height);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.site-banner {
    width: 100%;
    overflow: hidden;
    line-height: 0;
    position: relative;
}

.site-banner::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to bottom, transparent, var(--bg-primary));
    pointer-events: none;
}

.site-banner img {
    width: 100%;
    height: auto;
    object-fit: cover;
    max-height: 300px;
}

.promo-banner {
    display: block;
    background: linear-gradient(135deg, #2e2620 0%, #3d342a 100%);
    color: var(--text-secondary);
    text-align: center;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border);
}

.promo-banner:hover {
    background: linear-gradient(135deg, #3d342a 0%, #4a3f33 100%);
    color: var(--text-primary);
}

.promo-banner strong {
    color: var(--accent);
}

.site-header {
    padding: var(--spacing-md) var(--spacing-md);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--content-width);
    margin: 0 auto;
    width: 100%;
}

.site-title {
    display: flex;
    align-items: center;
}

.site-icon {
    height: 60px;
    width: auto;
}

.site-title:hover {
    opacity: 0.9;
}

.site-nav a {
    color: var(--text-secondary);
    margin-left: var(--spacing-lg);
}

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

main {
    flex: 1;
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: var(--content-width);
    margin: 0 auto;
    width: 100%;
}

.site-footer {
    padding: var(--spacing-lg) var(--spacing-md);
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   Loading & No-JS
   -------------------------------------------------------------------------- */
.loading {
    text-align: center;
    color: var(--text-secondary);
    padding: var(--spacing-xl);
}

.noscript-warning {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: var(--spacing-lg);
    text-align: center;
}

/* --------------------------------------------------------------------------
   Post List (Homepage)
   -------------------------------------------------------------------------- */
.post-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.post-list-header h1 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 400;
    margin: 0;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

.sort-toggle {
    display: flex;
    gap: var(--spacing-sm);
}

.sort-toggle button {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.875rem;
    font-family: var(--font-body);
    transition: all 0.3s ease;
}

.sort-toggle button:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    box-shadow: var(--glow-ember);
}

.sort-toggle button.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-primary);
    box-shadow: var(--glow-ember);
}

.active-filter {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border);
}

.active-filter .clear-filter {
    color: var(--text-muted);
    cursor: pointer;
}

.active-filter .clear-filter:hover {
    color: var(--text-primary);
}

.post-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.post-item {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border);
}

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

.post-item-title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 400;
    margin: 0 0 var(--spacing-sm) 0;
    letter-spacing: 0.01em;
}

.post-item-title a {
    color: var(--text-primary);
}

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

.post-item-meta {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.post-item-excerpt {
    color: var(--text-secondary);
    margin: 0;
}

.post-item-tags {
    margin-top: var(--spacing-sm);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

/* --------------------------------------------------------------------------
   Tags
   -------------------------------------------------------------------------- */
.tag {
    display: inline-block;
    background: var(--tag-bg);
    color: var(--tag-text);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius);
    font-size: 0.75rem;
    text-transform: lowercase;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.tag:hover {
    background: var(--bg-tertiary);
    color: var(--accent);
    border-color: var(--accent);
    box-shadow: var(--glow-ember);
}

/* --------------------------------------------------------------------------
   Single Post
   -------------------------------------------------------------------------- */
.post-header {
    margin-bottom: var(--spacing-xl);
}

.post-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 400;
    margin: 0 0 var(--spacing-md) 0;
    line-height: 1.3;
    letter-spacing: 0.02em;
}

.post-meta {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.post-content {
    /* Readable line length */
    max-width: 65ch;
}

/* --------------------------------------------------------------------------
   Markdown Content Styling
   -------------------------------------------------------------------------- */
.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
    font-family: var(--font-heading);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
    line-height: 1.3;
    letter-spacing: 0.02em;
}

.post-content h1 { font-size: 1.75rem; }
.post-content h2 { font-size: 1.5rem; }
.post-content h3 { font-size: 1.25rem; }
.post-content h4 { font-size: 1.1rem; }
.post-content h5,
.post-content h6 { font-size: 1rem; }

/* Drop cap for first paragraph */
.post-content > p:first-of-type::first-letter {
    font-family: var(--font-heading);
    float: left;
    font-size: 3.5rem;
    line-height: 0.8;
    padding-right: 0.1em;
    color: var(--accent);
    font-weight: 400;
}

.post-content p {
    margin: 0 0 var(--spacing-lg) 0;
}

.post-content ul,
.post-content ol {
    margin: 0 0 var(--spacing-lg) 0;
    padding-left: var(--spacing-lg);
}

.post-content li {
    margin-bottom: var(--spacing-sm);
}

.post-content blockquote {
    margin: 0 0 var(--spacing-lg) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    border-left: 4px solid var(--blockquote-border);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-style: italic;
}

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

.post-content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    background: var(--code-bg);
    padding: 0.2em 0.4em;
    border-radius: 3px;
}

.post-content pre {
    margin: 0 0 var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background: var(--code-bg);
    border-radius: var(--radius);
    overflow-x: auto;
    border: 1px solid var(--border);
}

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

.post-content hr {
    border: none;
    margin: var(--spacing-xl) auto;
    height: 1px;
    max-width: 200px;
    background: linear-gradient(90deg, transparent, var(--blockquote-border), transparent);
}

.post-content a {
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

/* --------------------------------------------------------------------------
   Chapter Navigation
   -------------------------------------------------------------------------- */
.chapter-nav {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
}

.chapter-nav a {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius);
    flex: 1;
    max-width: 45%;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.chapter-nav a:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent);
    box-shadow: var(--glow-ember);
}

.chapter-nav .label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.chapter-nav .title {
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 400;
}

.chapter-nav .prev {
    text-align: left;
}

.chapter-nav .next {
    text-align: right;
    margin-left: auto;
}

/* --------------------------------------------------------------------------
   About Page
   -------------------------------------------------------------------------- */
.about-content {
    max-width: 65ch;
}

.about-content h1 {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    letter-spacing: 0.02em;
}

/* --------------------------------------------------------------------------
   Empty State
   -------------------------------------------------------------------------- */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 600px) {
    :root {
        --font-size-base: 16px;
    }

    .site-header {
        padding: var(--spacing-md);
    }

    main {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .post-title {
        font-size: 1.5rem;
    }

    .chapter-nav {
        flex-direction: column;
    }

    .chapter-nav a {
        max-width: 100%;
    }
}