/* ===========================================
   Álvaro Substack Theme
   Editorial, content-focused, clean
   =========================================== */

/* --- CSS Variables --- */
:root,
[data-theme="light"] {
    --color-bg: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-text: #1a1a1a;
    --color-text-secondary: #6b7280;
    --color-text-tertiary: #9ca3af;
    --color-border: #e5e7eb;
    --color-accent: #10b981;
    --color-accent-hover: #059669;
    --color-code-bg: #1e1e2e;
    --color-tag-bg: #f0fdf4;
    --color-tag-text: #065f46;
    --color-card-hover: #f9fafb;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] {
    --color-bg: #111111;
    --color-bg-secondary: #1a1a1a;
    --color-text: #e5e5e5;
    --color-text-secondary: #a3a3a3;
    --color-text-tertiary: #737373;
    --color-border: #262626;
    --color-accent: #34d399;
    --color-accent-hover: #6ee7b7;
    --color-code-bg: #0d0d0d;
    --color-tag-bg: #052e16;
    --color-tag-text: #6ee7b7;
    --color-card-hover: #1a1a1a;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 18px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Lora', Georgia, serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    transition: background-color 0.3s ease, color 0.3s ease;
}

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

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

img {
    max-width: 100%;
    height: auto;
}

/* --- Header --- */
.site-header {
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    background-color: var(--color-bg);
    z-index: 100;
    transition: background-color 0.3s ease;
}

.header-inner {
    max-width: 780px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-title-link {
    text-decoration: none;
    color: var(--color-text);
}

.site-title {
    font-family: 'DM Sans', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.site-logo {
    height: 28px;
    width: auto;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.nav-link {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.nav-current {
    color: var(--color-text);
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: 0.25rem;
    display: flex;
    align-items: center;
    transition: color 0.2s ease;
    border-radius: 4px;
}

.theme-toggle:hover {
    color: var(--color-text);
}

[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* --- Content Area --- */
.content-area {
    max-width: 780px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 4rem;
}

/* --- Site Intro (homepage) --- */
.site-intro {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.site-description {
    font-family: 'Lora', Georgia, serif;
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* --- Post Feed (homepage) --- */
.post-feed {
    display: flex;
    flex-direction: column;
}

.post-card {
    border-bottom: 1px solid var(--color-border);
}

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

.post-card-link {
    display: block;
    padding: 1.75rem 0;
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s ease;
}

.post-card-link:hover {
    opacity: 0.85;
}

.post-card-link:hover .post-card-title {
    color: var(--color-accent);
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.5rem;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-tertiary);
}

.post-card-tag {
    color: var(--color-accent);
}

.meta-sep {
    color: var(--color-text-tertiary);
}

.post-card-title {
    font-family: 'DM Sans', sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 0.5rem;
    color: var(--color-text);
    letter-spacing: -0.02em;
    transition: color 0.2s ease;
}

.post-card-excerpt {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.post-card-readmore {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
}

/* --- Pagination --- */
.pagination {
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.pagination-link {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
}

/* --- Post Full --- */
.post-header {
    margin-bottom: 2rem;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.75rem;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.post-tag {
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.75rem;
}

.post-title {
    font-family: 'DM Sans', sans-serif;
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
    color: var(--color-text);
}

.post-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    margin-top: 0.75rem;
    line-height: 1.6;
}

.reading-time {
    font-family: 'DM Sans', sans-serif;
}

/* --- Feature Image --- */
.post-feature-image {
    margin-bottom: 2rem;
    border-radius: 8px;
    overflow: hidden;
}

.post-feature-image img {
    width: 100%;
    display: block;
}

.post-feature-image figcaption {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    text-align: center;
    margin-top: 0.5rem;
}

/* --- Post Content --- */
.post-content {
    font-size: 1rem;
    line-height: 1.8;
}

.post-content h2 {
    font-family: 'DM Sans', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.post-content h3 {
    font-family: 'DM Sans', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    margin-top: 2rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.post-content h4 {
    font-family: 'DM Sans', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.post-content p {
    margin-bottom: 1.25rem;
}

.post-content ul,
.post-content ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.post-content li {
    margin-bottom: 0.4rem;
}

.post-content blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: 1.25rem;
    margin: 1.5rem 0;
    color: var(--color-text-secondary);
    font-style: italic;
}

.post-content a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
    text-decoration-thickness: 1px;
}

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

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

.post-content hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 2rem 0;
}

.post-content img {
    border-radius: 6px;
    margin: 1.5rem 0;
}

.post-content figure {
    margin: 1.5rem 0;
}

.post-content figcaption {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    text-align: center;
    margin-top: 0.5rem;
}

/* --- Code --- */
.post-content code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85em;
    background-color: var(--color-bg-secondary);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    color: var(--color-accent);
}

.post-content pre {
    margin: 1.5rem 0;
    border-radius: 8px;
    overflow-x: auto;
}

.post-content pre code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: 0.82rem;
    line-height: 1.6;
}

/* Override Prism theme to match our style */
.post-content pre[class*="language-"],
pre[class*="language-"] {
    background: var(--color-code-bg) !important;
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
    border: 1px solid var(--color-border);
}

code[class*="language-"],
pre[class*="language-"] {
    font-family: 'JetBrains Mono', monospace !important;
    font-size: 0.82rem !important;
}

/* --- Tables --- */
.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
}

.post-content th,
.post-content td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    text-align: left;
}

.post-content th {
    font-family: 'DM Sans', sans-serif;
    font-weight: 600;
    background-color: var(--color-bg-secondary);
}

/* --- Post Footer --- */
.post-footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.tag-pill {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.75rem;
    font-weight: 500;
    background-color: var(--color-tag-bg);
    color: var(--color-tag-text);
    padding: 0.3rem 0.75rem;
    border-radius: 100px;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.tag-pill:hover {
    opacity: 0.8;
    color: var(--color-tag-text);
}

/* --- Author Card --- */
.post-author-card {
    padding: 1.5rem;
    background-color: var(--color-bg-secondary);
    border-radius: 8px;
}

.author-info {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.author-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.author-name {
    font-family: 'DM Sans', sans-serif;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--color-text);
    text-decoration: none;
}

.author-name:hover {
    color: var(--color-accent);
}

.author-bio {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-top: 0.25rem;
}

/* --- Tag Header --- */
.tag-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.tag-title {
    font-family: 'DM Sans', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.tag-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-top: 0.5rem;
}

/* --- Author Header --- */
.author-header {
    text-align: center;
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.author-header-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1rem;
}

.author-header-name {
    font-family: 'DM Sans', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
}

.author-header-bio {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-top: 0.5rem;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

/* --- Error Page --- */
.error-page {
    text-align: center;
    padding: 6rem 1.5rem;
}

.error-code {
    font-family: 'DM Sans', sans-serif;
    font-size: 5rem;
    font-weight: 800;
    color: var(--color-text-tertiary);
    letter-spacing: -0.04em;
}

.error-message {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-top: 0.5rem;
    margin-bottom: 2rem;
}

.error-link {
    font-family: 'DM Sans', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-accent);
}

/* --- Footer --- */
.site-footer {
    border-top: 1px solid var(--color-border);
    margin-top: 2rem;
}

.footer-inner {
    max-width: 780px;
    margin: 0 auto;
    padding: 1.5rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-text {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.footer-powered {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
}

.footer-powered a {
    color: var(--color-text-tertiary);
    text-decoration: underline;
}

/* --- Ghost-specific: Bookmark cards, galleries, etc. --- */
.kg-bookmark-card {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
    margin: 1.5rem 0;
}

.kg-bookmark-container {
    display: flex;
    text-decoration: none;
    color: inherit;
}

.kg-bookmark-content {
    padding: 1.25rem;
    flex: 1;
}

.kg-bookmark-title {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.kg-bookmark-description {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.kg-bookmark-metadata {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    margin-top: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.kg-bookmark-icon {
    width: 16px;
    height: 16px;
}

.kg-bookmark-thumbnail {
    width: 180px;
    flex-shrink: 0;
}

.kg-bookmark-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.kg-gallery-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 0.5rem;
    margin: 1.5rem 0;
}

.kg-gallery-image img {
    border-radius: 4px;
}

.kg-callout-card {
    padding: 1.25rem;
    border-radius: 8px;
    margin: 1.5rem 0;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
}

.kg-callout-text {
    font-size: 0.9rem;
}

.kg-toggle-card {
    margin: 1.5rem 0;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
}

.kg-toggle-heading {
    padding: 1rem 1.25rem;
    cursor: pointer;
    font-family: 'DM Sans', sans-serif;
    font-weight: 600;
}

.kg-toggle-content {
    padding: 0 1.25rem 1rem;
}

/* --- Ghost Card Width Classes --- */
.kg-width-wide {
    margin-left: -6rem;
    margin-right: -6rem;
    max-width: calc(100% + 12rem);
}

.kg-width-full {
    margin-left: calc(-50vw + 50%);
    margin-right: calc(-50vw + 50%);
    max-width: 100vw;
    width: 100vw;
}

.kg-width-wide img,
.kg-width-full img {
    width: 100%;
}

@media (max-width: 900px) {
    .kg-width-wide {
        margin-left: -1rem;
        margin-right: -1rem;
        max-width: calc(100% + 2rem);
    }
}

/* --- Responsive --- */
@media (max-width: 640px) {
    html {
        font-size: 16px;
    }

    .header-inner {
        padding: 0.75rem 1rem;
    }

    .content-area {
        padding: 2rem 1rem 3rem;
    }

    .post-title {
        font-size: 1.75rem;
    }

    .post-card-title {
        font-size: 1.15rem;
    }

    .footer-inner {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .kg-bookmark-container {
        flex-direction: column;
    }

    .kg-bookmark-thumbnail {
        width: 100%;
        height: 180px;
    }
}