/**
 * blog-styles.css
 * Mobile-first responsive design for blog
 */

/* ── Theme Variables ── */
/* Blog-local variables only. The shared palette (--text*, --bg*, --link,
   --button-*, --focus-color, --*-contrast, …) lives in /res/css/global.css,
   whose `:root .theme-light` selector outranks `body.theme-light` — any
   redefinition here would be inert. */
body.theme-light {
    --accent: #6c8ebf;
    --skeleton-base: #e0e0e0;
    --skeleton-shine: #f5f5f5;
}

body.theme-dark {
    --accent: #6c8ebf;
    --skeleton-base: #2a2a2a;
    --skeleton-shine: #3a3a3a;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
    transition: background-color 0.3s, color 0.3s;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1em;
}

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

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

/* ── Header ── */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--header-bg);
    border-bottom: 1px solid var(--good-contrast);
    position: sticky;
    top: 0;
    z-index: 100;
}
.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-high-contrast);
}
.auth-btn {
    display: flex;
    align-items: center;
    padding: 0.45rem 1rem;
    border: 1px solid var(--good-contrast);
    background: var(--bg-faint-contrast);
    color: var(--text);
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.2s, border-color 0.2s;
    max-width: 150px;
    overflow: hidden;
    white-space: nowrap;
}
.auth-btn span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}
.auth-btn:hover { background: var(--faint-contrast); border-color: var(--mild-contrast); }

/* ── Header right-side action group ── */
.header-actions {
    display: flex;
    align-items: stretch;
    gap: 0.5rem;
}
.home-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 1rem;
    border: 1px solid var(--good-contrast);
    background: var(--bg-faint-contrast);
    color: var(--text);
    border-radius: 0.375rem;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.9rem;
    transition: background 0.2s, border-color 0.2s;
    flex-shrink: 0;
    white-space: nowrap;
}
.home-btn:hover { background: var(--faint-contrast); border-color: var(--mild-contrast); }

/* ── Container ── */
.container {
    max-width: 900px;
    min-height: 70dvh;
    margin: 0 auto;
    padding: 1.5rem 1rem;
    flex: 1;
}

/* ── Blog Overview ── */
.blog-overview {
    width: 100%;
}

.blog-title {
    margin-bottom: 1.5rem;
}

.blog-filters {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.search-input,
.category-filter {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--input-border);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text);
    font-size: 1rem;
}

.search-input:focus,
.category-filter:focus {
    outline: none;
    border-color: var(--focus-color);
    box-shadow: 0 0 0 3px rgba(68, 136, 136, 0.1);
}

.category-filter {
    cursor: pointer;
}

/* ── Blog Entries Grid ── */
.blog-entries {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.blog-card {
    background-color: var(--bg-faint-contrast);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.blog-card.featured {
    border: 2px solid var(--focus-color);
}

.card-image {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
}

.card-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-less-contrast);
}

.category {
    background-color: var(--focus-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.read-time {
    display: flex;
    align-items: center;
}

.card-title {
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
    color: var(--text-high-contrast);
}

.card-description {
    color: var(--text);
    margin-bottom: 1rem;
    flex-grow: 1;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background-color: var(--faint-contrast);
    color: var(--text-medium-contrast);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
}

.no-entries {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-less-contrast);
    font-size: 1.1rem;
}

.loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-less-contrast);
}

/* ── Blog Entry View ── */
.blog-entry-view {
    width: 100%;
}

.blog-taskbar {
    background-color: var(--bg-faint-contrast);
    padding: 1rem;
    margin-bottom: 2rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.back-btn {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--link);
    font-weight: 600;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.back-btn:hover {
    background-color: var(--faint-contrast);
}

.back-icon {
    font-size: 1.25rem;
}

.entry-title {
    font-size: 1.5rem;
    flex-grow: 1;
    margin: 0;
}

/* ── Blog Article ── */
.blog-article {
    line-height: 1.8;
}

.blog-meta-header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--faint-contrast);
}

.meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.95rem;
    color: var(--text-less-contrast);
}

.author {
    font-weight: 600;
    color: var(--text);
}

.tags-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.featured-image-wrapper {
    margin-bottom: 2rem;
    text-align: center;
}

.featured-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.image-caption {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-less-contrast);
    font-style: italic;
}

/* ── Blog Content ── */
.blog-content {
    margin-bottom: 3rem;
}

.blog-heading {
    margin-top: 2em;
    margin-bottom: 1em;
}

.blog-heading:first-child {
    margin-top: 0;
}

.blog-paragraph {
    margin-bottom: 1.25rem;
}

.blog-image {
    margin: 2rem 0;
    text-align: center;
}

.blog-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.blog-image figcaption {
    margin-top: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-less-contrast);
    font-style: italic;
}

/* ── Code Blocks ── */
.code-block {
    background-color: var(--bg-faint-contrast);
    border: 1px solid var(--faint-contrast);
    border-radius: 8px;
    overflow-x: auto;
    margin: 1.5rem 0;
}

.code-block pre {
    padding: 1rem;
    margin: 0;
}

.code-block code {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.4;
}

/* ── Lists ── */
.blog-list {
    margin: 1.5rem 0 1.5rem 1.5rem;
}

.blog-list li {
    margin-bottom: 0.5rem;
}

/* ── Callouts ── */
.blog-callout {
    padding: 1rem;
    border-left: 4px solid;
    border-radius: 4px;
    margin: 1.5rem 0;
    background-color: var(--bg-faint-contrast);
}

.callout-info {
    border-left-color: var(--focus-color);
}

.callout-warning {
    border-left-color: var(--warning);
}

.callout-error {
    border-left-color: var(--error);
}

.callout-success {
    border-left-color: var(--success);
}

.callout-title {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.callout-title::before {
    content: 'ⓘ ';
    margin-right: 0.25rem;
}

.callout-warning .callout-title::before {
    content: '⚠ ';
}

.callout-error .callout-title::before {
    content: '✕ ';
}

.callout-success .callout-title::before {
    content: '✓ ';
}

/* ── Translation Banner ── */
.translation-banner {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0.65rem 1rem;
    margin-bottom: 1.75rem;
    border-left: 4px solid var(--accent);
    border-radius: 4px;
    background-color: var(--bg-faint-contrast);
    font-size: 0.9rem;
    color: var(--text-less-contrast);
}

.translation-banner a {
    color: var(--link);
    font-weight: 500;
    white-space: nowrap;
}

/* ── Related Articles ── */
.blog-related {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--faint-contrast);
}

.related-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

/* ── Footer — always at page bottom ── */
.footer {
    background: var(--footer-bg);
    border-top: 1px solid var(--mild-contrast);
    padding: 1.25rem;
    font-size: 0.85rem;
    color: var(--text);
}
.footer-content {
    max-width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
}
.footer ul { list-style: none; display: flex; gap: 0.4rem; padding: 0; margin: 0; flex-wrap: wrap; }
.footer a {
    color: var(--text);
    text-decoration: none;
    transition: color 0.2s;
}
.footer a:hover { color: var(--text-high-contrast); }
.footer .separator {
    color: var(--text-medium-contrast);
}

/* ── Accessibility ── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ── Mobile Optimizations ── */
@media (max-width: 480px) {
    .header {
        flex-direction: column;
        gap: 0.75rem;
    }

    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.35rem; }
    h3 { font-size: 1.2rem; }

    .container {
        padding: 1rem;
    }

    .blog-filters {
        gap: 0.75rem;
    }

    .blog-taskbar {
        flex-direction: column;
        text-align: center;
    }

    .entry-title {
        font-size: 1.25rem;
    }

    .card-meta {
        font-size: 0.85rem;
    }

    .blog-entries {
        gap: 1rem;
    }

    .card-content {
        padding: 1rem;
    }
}

/* ── Modals ── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.modal-overlay.active { display: flex; }
.modal-content {
    background: var(--bg);
    border-radius: 0.5rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border: 1px solid var(--mild-contrast);
    animation: fadeIn 0.15s ease-out;
}
.modal-overlay.user-menu {
    align-items: flex-start;
    justify-content: flex-end;
    padding-top: 5.5rem;
    padding-right: 1.25rem;
}
.modal-overlay.user-menu .modal-content { width: 260px; padding: 1.5rem; }
.modal-overlay.login-modal .modal-content { width: 100%; max-width: 380px; padding: 2rem; }
.modal-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-high-contrast);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.modal-btn {
    display: block;
    width: 100%;
    padding: 0.7rem 1rem;
    margin-bottom: 0.5rem;
    border: 1px solid var(--faint-contrast);
    background: var(--bg-faint-contrast);
    color: var(--text);
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.9rem;
    text-align: left;
    transition: background 0.2s, border-color 0.2s;
    text-decoration: none;
    box-sizing: border-box;
}
.modal-btn:hover {
    background: var(--faint-contrast);
    border-color: var(--mild-contrast);
}
.modal-btn.logout-btn {
    background: var(--error);
    color: #fff;
    border-color: transparent;
    margin-top: 1rem;
}
.modal-btn.logout-btn:hover { filter: brightness(0.88); }

/* ── Login Form ── */
.login-form { display: flex; flex-direction: column; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label {
    font-weight: 500;
    color: var(--text);
    font-size: 0.9rem;
}
.form-group input {
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--input-border);
    border-radius: 0.375rem;
    font-size: 0.9rem;
    background: var(--input-bg);
    color: var(--text-high-contrast);
    transition: border-color 0.2s;
}
.form-group input:focus {
    outline: none;
    border-color: var(--focus-color);
    box-shadow: 0 0 0 3px rgba(68,102,136,0.2);
}
.login-btn {
    padding: 0.7rem 1rem;
    border: none;
    background: var(--button-bg);
    color: var(--button-text);
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: filter 0.2s;
}
.login-btn:hover { filter: brightness(1.15); }
.login-btn:disabled { filter: brightness(0.6); cursor: not-allowed; }
.error-message {
    color: var(--error);
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}