/* ==================== THEME VARIABLES ==================== */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-card: #ffffff;
    --bg-elevated: #f3f4f6;
    --text-primary: #111827;
    --text-secondary: #1f2937;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --border-hover: #d1d5db;
    --nav-bg: rgba(255, 255, 255, 0.85);
    --tag-bg: #f3f4f6;
    --tag-border: #e5e7eb;
    --tag-text: #374151;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --btn-primary-bg: #111827;
    --btn-primary-text: #ffffff;
    --btn-primary-hover: #374151;
    --code-inline-bg: #f3f4f6;
    --code-block-bg: #1e293b;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.05);

    /* Badges */
    --badge-pub-bg: #dcfce7;
    --badge-pub-text: #15803d;
    --badge-draft-bg: #fef9c3;
    --badge-draft-text: #a16207;
    --badge-arch-bg: #f3f4f6;
    --badge-arch-text: #4b5563;
}

[data-theme="dark"] {
    --bg-primary: #0b0f19;       /* Deep slate dark background */
    --bg-secondary: #111827;
    --bg-card: #151e2e;          /* Slightly elevated card background */
    --bg-elevated: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #94a3b8;
    --border-color: #243248;
    --border-hover: #3b4d66;
    --nav-bg: rgba(11, 15, 25, 0.85);
    --tag-bg: #1e293b;
    --tag-border: #334155;
    --tag-text: #cbd5e1;
    --accent: #60a5fa;
    --accent-hover: #93c5fd;
    --btn-primary-bg: #38bdf8;
    --btn-primary-text: #0f172a;
    --btn-primary-hover: #7dd3fc;
    --code-inline-bg: #1e293b;
    --code-block-bg: #030712;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.4);

    /* Dark Badges */
    --badge-pub-bg: #064e3b;
    --badge-pub-text: #6ee7b7;
    --badge-draft-bg: #713f12;
    --badge-draft-text: #fde047;
    --badge-arch-bg: #334155;
    --badge-arch-text: #94a3b8;
}

/* ==================== GENERICS ==================== */
body {
    min-height: 100dvh;
    display: grid;
    grid-template-rows: auto auto 1fr auto;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.2s ease, color 0.2s ease;
}

code, pre {
    font-family: ui-monospace, "SF Mono", "Cascadia Code", "Fira Code", monospace;
}

a {
    color: inherit;
    text-decoration: none;
    cursor: pointer;
}

/* ==================== NAVBAR ==================== */
.site-nav {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--nav-bg);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s ease, border-color 0.2s ease;
}

.nav-content {
    width: 100%;
    max-width: 1280px;
    margin-inline: auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    font-weight: 700;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.site-logo-icon {
    display: inline-block;
    width: 24px;
    height: 24px;
    color: var(--text-primary);
    flex-shrink: 0;
    transition: color 0.2s ease;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    color: var(--text-primary);
}

.btn-theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.35rem 0.6rem;
    font-size: 1rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    transition: all 0.15s ease;
}

.btn-theme-toggle:hover {
    background-color: var(--tag-bg);
    border-color: var(--border-hover);
}

.btn-theme-toggle-admin {
    border-color: #374151;
}

.btn-theme-toggle-admin:hover {
    background-color: #1f2937;
}

.theme-icon {
    display: block;
    color: var(--text-primary);
    transition: transform 0.3s ease, color 0.2s ease;
}

.btn-theme-toggle-admin .theme-icon {
    color: #9ca3af;
}

.btn-theme-toggle-admin:hover .theme-icon {
    color: #ffffff;
}

[data-theme="dark"] .theme-icon {
    transform: rotate(180deg);
}

main {
    width: 100%;
    max-width: 1280px;
    margin-inline: auto;
    padding: clamp(1.25rem, 3vw, 3rem) 1.5rem;
}

.footer {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    padding: 2rem 1.5rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
}

/* ==================== HOMEPAGE ==================== */
.blogs-overview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 360px), 1fr));
    gap: 1.5rem;
}

.grid-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.grid-item:hover {
    transform: translateY(-3px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.preview-image-wrapper {
    position: relative;
    aspect-ratio: 3/2;
    width: 100%;
    overflow: hidden;
    background-color: var(--bg-elevated);
}

.preview-image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.preview-content h2 a {
    color: var(--text-primary);
    transition: color 0.15s ease;
}

.preview-content h2 a:hover {
    color: var(--accent);
}

.preview-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 0.5rem;
}

.tag {
    display: inline-block;
    padding: 0.2rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1.2;
    background-color: var(--tag-bg);
    color: var(--tag-text);
    border: 1px solid var(--tag-border);
    border-radius: 9999px;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.preview-content-date {
    margin-top: auto;
    align-self: flex-end;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==================== SINGLE POST ==================== */
.post-single {
    max-width: 780px;
    margin-inline: auto;
}

.post-header {
    margin-bottom: 2rem;
}

.post-date {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.post-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.post-featured-image-wrapper {
    margin-top: 1.5rem;
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 16/9;
    background-color: var(--bg-elevated);
}

.post-featured-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.post-content {
    font-size: 1.125rem;
    line-height: 1.75;
    color: var(--text-secondary);
}

.post-content p {
    margin-bottom: 1.5rem;
}

.post-content h2,
.post-content h3,
.post-content h4 {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

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

.post-content li {
    margin-bottom: 0.5rem;
}

.post-content blockquote {
    border-inline-start: 4px solid var(--border-color);
    padding-inline-start: 1rem;
    font-style: italic;
    color: var(--text-muted);
    margin: 1.5rem 0;
}

.post-content pre {
    background: var(--code-block-bg);
    color: #f8fafc;
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.post-content code {
    background: var(--code-inline-bg);
    color: var(--text-primary);
    padding: 0.15rem 0.35rem;
    border-radius: 4px;
    font-size: 0.9em;
}

.post-content pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

.post-content a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    font-weight: 500;
    transition: color 0.15s ease;
}

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

/* ==================== PAGINATION ==================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.btn-pagination {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-pagination:hover:not(.disabled) {
    background-color: var(--bg-elevated);
    border-color: var(--border-hover);
}

.btn-pagination.disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
}

.pagination-pages {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* ==================== BUTTONS ==================== */
.btn-primary {
    display: inline-block;
    padding: 0.65rem 1.25rem;
    background-color: var(--btn-primary-bg);
    color: var(--btn-primary-text);
    font-weight: 600;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.btn-primary:hover {
    background-color: var(--btn-primary-hover);
}

/* ==================== ERROR & ABOUT ==================== */
.error-page {
    text-align: center;
    padding: clamp(3rem, 8vw, 6rem) 1.5rem;
    max-width: 600px;
    margin-inline: auto;
}

.error-code {
    font-size: clamp(4rem, 10vw, 7rem);
    font-weight: 900;
    line-height: 1;
    color: var(--border-color);
    margin-bottom: 0.5rem;
}

.error-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

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

.about-page {
    max-width: 780px;
    margin-inline: auto;
}

.about-header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.about-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.about-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.about-lead {
    font-size: 1.25rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.about-body {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    font-size: 1.125rem;
    line-height: 1.75;
    color: var(--text-secondary);
}

.about-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.about-section a {
    color: var(--accent);
    text-decoration: underline;
}

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

.about-tech-stack {
    list-style: disc;
    padding-inline-start: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* ==================== ADMIN DASHBOARD ==================== */
.admin-shell {
    min-height: 100vh;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.admin-topbar {
    background-color: #111827;
    color: #ffffff;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid #1f2937;
}

.admin-topbar-content {
    max-width: 1280px;
    margin-inline: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-brand-link {
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.admin-badge {
    background: #374151;
    color: #9ca3af;
    font-size: 0.7rem;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    text-transform: uppercase;
    font-weight: 700;
}

.admin-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.admin-nav-link {
    color: #9ca3af;
    font-size: 0.9rem;
    transition: color 0.15s ease;
}

.admin-nav-link:hover {
    color: #ffffff;
}

.admin-nav-logout {
    color: #f87171;
}

.admin-nav-logout:hover {
    color: #ef4444;
}

.admin-container {
    max-width: 1280px;
    margin-inline: auto;
    padding: 2rem 1.5rem;
}

.admin-page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.admin-page-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.admin-page-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.admin-table-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.admin-table th {
    background-color: var(--bg-elevated);
    padding: 0.75rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

.admin-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
    color: var(--text-primary);
}

.admin-table tr:last-child td {
    border-bottom: none;
}

.admin-table tr:hover td {
    background-color: var(--bg-secondary);
}

.admin-post-title a {
    font-weight: 600;
    color: var(--text-primary);
}

.admin-post-title a:hover {
    color: var(--accent);
    text-decoration: underline;
}

.admin-post-slug {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: ui-monospace, monospace;
}

.badge-status {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    text-transform: capitalize;
}

.badge-published {
    background-color: var(--badge-pub-bg);
    color: var(--badge-pub-text);
}

.badge-draft {
    background-color: var(--badge-draft-bg);
    color: var(--badge-draft-text);
}

.badge-archived {
    background-color: var(--badge-arch-bg);
    color: var(--badge-arch-text);
}

.admin-actions {
    display: flex;
    gap: 0.4rem;
    justify-content: flex-end;
}

.btn-action {
    padding: 0.35rem 0.65rem;
    font-size: 0.8rem;
    font-weight: 500;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-action:hover {
    background: var(--bg-elevated);
    border-color: var(--border-hover);
}

.btn-action.btn-danger {
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.4);
}

.btn-action.btn-danger:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: #ef4444;
}

.admin-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.text-muted {
    color: var(--text-muted);
}

/* ==================== ADMIN FORMS ==================== */
.admin-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-col-12 { grid-column: span 12; }
.form-col-8  { grid-column: span 8; }
.form-col-6  { grid-column: span 6; }
.form-col-4  { grid-column: span 4; }

@media (max-width: 768px) {
    .form-col-8, .form-col-6, .form-col-4 {
        grid-column: span 12;
    }
}

.form-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.required {
    color: #ef4444;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.65rem 0.85rem;
    font-size: 0.95rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

.form-textarea {
    resize: vertical;
    line-height: 1.5;
}

.form-code {
    font-family: ui-monospace, "SF Mono", "Cascadia Code", "Fira Code", monospace;
    font-size: 0.9rem;
    tab-size: 4;
}

.form-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.admin-alert {
    padding: 0.85rem 1.25rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.admin-alert-danger {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* ==================== EDITOR TABS & PREVIEW ==================== */
.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.editor-tabs {
    display: flex;
    gap: 0.25rem;
    background-color: var(--bg-elevated);
    padding: 0.2rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.tab-btn {
    padding: 0.3rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s ease;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    background-color: var(--bg-card);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.preview-pane {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 2rem;
    min-height: 400px;
    max-height: 750px;
    overflow-y: auto;
}

.preview-box .post-single {
    margin: 0;
    padding: 0;
}