/* Custom Scrollbar for Sidebar Widgets */
.custom-scrollbar::-webkit-scrollbar {
    width: 4px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: transparent;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

:root {
    /* Shared Variables */
    --radius-sm: 4px;
    --radius-md: 8px;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;

    /* Dark Theme (Default) */
    --bg: #0A0C10;
    --bg-rgb: 10, 12, 16;
    --card-bg: #0D1117;
    --panel-bg: var(--card-bg);
    --input-bg: #161B22;
    --border: rgba(255, 255, 255, 0.05);
    --border-hover: rgba(255, 255, 255, 0.12);
    --text-main: rgba(255, 255, 255, 0.9);
    --fg: var(--text-main);
    --text-body: #94a3b8;
    --text-meta: rgba(255, 255, 255, 0.58);
    --text-muted: #94a3b8;
    --accent: #06b6d4;
    --accent-rgb: 6, 182, 212;
    --accent-dim: rgba(6, 182, 212, 0.7);
    --accent-foreground: #0A0C10;
    --accent-line: #164e63;
    --card-hover: rgba(255, 255, 255, 0.01);
    --placeholder: rgba(255, 255, 255, 0.2);
    --glass-bg: rgba(13, 17, 23, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
    --overlay-bg: rgba(10, 12, 16, 0.72);
    --inset-bg: #161B22;
    --inset-border: #30363d;
    --tag-bg: rgba(124, 58, 237, 0.12);
    --tag-bg-hover: rgba(124, 58, 237, 0.2);
    --tag-text: #c4b5fd;
    --tag-border: rgba(167, 139, 250, 0.3);
    --image-placeholder-base: #152331;
    --image-placeholder-sheen: rgba(34, 211, 238, 0.48);
    --image-placeholder-border: rgba(34, 211, 238, 0.9);
    --image-placeholder-stripe: rgba(34, 211, 238, 0.16);

    /* Spacing System */
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
}

/* Dynamic values are applied through data attributes and CSSOM, not HTML style attributes. */
.exp-progress-bar {
    width: 0%;
}

.backpack-item-shell {
    --backpack-rarity: var(--accent);
    box-shadow: inset 0 0 10px color-mix(in srgb, var(--backpack-rarity) 12%, transparent),
        0 0 0 1px color-mix(in srgb, var(--backpack-rarity) 32%, transparent);
}

.backpack-item-shell [data-backpack-rarity-background="true"] {
    background-color: var(--backpack-rarity);
}

.backpack-item-shell [data-backpack-rarity-color="true"] {
    color: var(--backpack-rarity);
}

.inventory-board-scroll {
    overflow: auto;
    padding: 1px;
}

.inventory-grid {
    --inventory-cell-size: 44px;
    --inventory-columns: 10;
    --inventory-rows: 10;
    display: grid;
    grid-template-columns: repeat(var(--inventory-columns), var(--inventory-cell-size));
    grid-template-rows: repeat(var(--inventory-rows), var(--inventory-cell-size));
    width: max-content;
    border: 1px solid var(--inset-border);
    background-color: var(--inset-bg);
    background-image:
        linear-gradient(to right, color-mix(in srgb, var(--inset-border) 85%, transparent) 1px, transparent 1px),
        linear-gradient(to bottom, color-mix(in srgb, var(--inset-border) 85%, transparent) 1px, transparent 1px);
    background-size: var(--inventory-cell-size) var(--inventory-cell-size);
    background-position: -1px -1px;
    touch-action: manipulation;
}

.inventory-item {
    position: relative;
    z-index: 1;
    display: flex;
    min-width: 0;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 2px solid color-mix(in srgb, var(--backpack-rarity, var(--accent)) 76%, white 8%);
    border-radius: 2px;
    background: color-mix(in srgb, var(--backpack-rarity, var(--accent)) 24%, var(--panel-bg));
    box-shadow: inset 0 0 18px color-mix(in srgb, var(--backpack-rarity, var(--accent)) 18%, transparent);
    color: var(--main-text, var(--text));
    cursor: grab;
    padding: 4px;
    text-align: center;
}

.inventory-item:hover { z-index: 3; filter: brightness(1.14); }
.inventory-item:active { cursor: grabbing; }
.inventory-item-name { max-width: 100%; overflow: hidden; font-size: 11px; font-weight: 800; line-height: 1.2; text-overflow: ellipsis; }
.inventory-item-size { position: absolute; top: 2px; left: 4px; font: 9px/1 ui-monospace, monospace; opacity: .75; }
.inventory-item-quantity { position: absolute; right: 3px; bottom: 2px; border-radius: 2px; background: rgb(0 0 0 / 68%); padding: 1px 3px; color: white; font: 10px/1.2 ui-monospace, monospace; }
.inventory-grid.is-saving { opacity: .72; pointer-events: none; }
.inventory-nested-item { border: 1px solid var(--border); background: var(--bg); padding: .5rem .65rem; font-size: .75rem; cursor: grab; }

@media (max-width: 540px) {
    .inventory-grid { --inventory-cell-size: 38px; }
}

.user-center-tab {
    flex: 0 0 auto;
    border: 1px solid transparent;
    border-bottom: 2px solid transparent;
    padding: .7rem .85rem;
    color: var(--meta);
    font-size: .82rem;
    font-weight: 700;
    transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.user-center-tab:hover,
.user-center-tab[aria-selected="true"] {
    color: var(--accent);
    border-bottom-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 7%, transparent);
}

.user-center-quick-link {
    display: block;
    border: 1px solid var(--border);
    border-radius: .55rem;
    padding: .55rem .65rem;
    color: var(--meta);
    transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.user-center-quick-link:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 7%, transparent);
}

.accent-color-accent {
    accent-color: var(--color-accent, #06b6d4);
}

.post-correction-warning-icon {
    display: inline;
    margin-top: -2px;
}

.tracking-text {
    max-height: 100px;
    overflow-y: auto;
}

.copy-tracking-text-button {
    width: 100%;
    margin-top: 8px;
    padding: 8px;
    font-size: 14px;
}

.vditor-progress-bar {
    width: 0%;
}

#historyModal.show .modal-container {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.light {
    /* Light Theme Overrides */
    --bg: #f9fafb;
    --bg-rgb: 249, 250, 251;
    --card-bg: #ffffff;
    --panel-bg: var(--card-bg);
    --input-bg: #f3f4f6;
    --border: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);
    --text-main: #111827;
    --fg: var(--text-main);
    --text-body: #374151;
    --text-meta: #4b5563;
    --text-muted: #4b5563;
    --accent: #0891b2;
    --accent-dim: rgba(8, 145, 178, 0.8);
    --accent-foreground: #0f172a;
    --accent-line: #cffafe;
    --card-hover: rgba(0, 0, 0, 0.02);
    --placeholder: rgba(0, 0, 0, 0.3);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.05);
    --overlay-bg: rgba(15, 23, 42, 0.46);
    --inset-bg: #f3f4f6;
    --inset-border: #d1d5db;
    --tag-bg: #f5f3ff;
    --tag-bg-hover: #ede9fe;
    --tag-text: #6d28d9;
    --tag-border: #ddd6fe;
    --image-placeholder-base: #e8f6fa;
    --image-placeholder-sheen: rgba(8, 145, 178, 0.42);
    --image-placeholder-border: rgba(8, 145, 178, 0.88);
    --image-placeholder-stripe: rgba(8, 145, 178, 0.16);
}

/* Base Styles */
html, body {
    background-color: var(--bg);
    color: var(--text-body);
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
    scroll-behavior: smooth;
}

body {
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-main);
    letter-spacing: -0.02em;
    font-weight: 700;
}

/* Typography Utilities */
.meta-mono {
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-body);
}

.comment-list-header {
    font-size: 1.125rem !important;
    font-weight: 900 !important;
    letter-spacing: 0.05em !important;
    color: var(--text-main) !important;
    text-transform: uppercase;
}

#comment-count {
    font-size: 0.875rem !important;
    font-weight: 900 !important;
    color: var(--accent) !important;
    background: var(--accent-line);
    padding: 4px 12px;
    border-radius: 8px;
}

/* Components */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.card:hover:not(.card-static) {
    border-color: var(--border-hover);
    background-color: var(--card-hover);
}

.card-static {
    transition: none;
}

.link-application-input {
    width: 100%;
    background: #ffffff !important;
    color: #111827 !important;
    border: 1px solid #d1d5db;
    border-radius: var(--radius-md);
    padding: 0.7rem 1rem;
    outline: none;
    opacity: 1;
    color-scheme: light;
    cursor: text;
    -webkit-text-fill-color: #111827;
}

.link-application-input:focus {
    border-color: var(--accent);
}

.link-application-input::placeholder {
    color: #9ca3af;
    -webkit-text-fill-color: #9ca3af;
}

.link-placement-option {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.8rem 1rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-main);
    cursor: pointer;
}

.btn-action-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.125rem 2.5rem;
    background: var(--accent);
    color: var(--accent-foreground);
    border: none;
    border-radius: 1rem;
    font-size: 0.9375rem;
    font-weight: 800;
    transition: all 0.25s ease;
    cursor: pointer;
    box-shadow: none; /* 移除沉重的发光阴影 */
    white-space: nowrap;
}

.btn-action-primary:hover {
    filter: brightness(1.05);
    transform: translateY(-2px);
}

.btn-action-primary:active {
    transform: translateY(0);
}

.btn-action-primary svg {
    width: 18px;
    height: 18px;
    stroke-width: 2.5;
}

.btn-minimal {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-size: 0.875rem;
    font-weight: 700;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.btn-minimal:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-foreground);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.2);
}

.btn-minimal:active {
    transform: translateY(0);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.tag-pill {
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--accent-dim);
    font-family: var(--font-mono);
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Form Inputs */
input[type="text"],
input[type="password"],
input[type="email"],
input[type="search"],
textarea {
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    outline: none;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus,
input[type="search"]:focus,
textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim);
}

/* Custom Checkbox Styles */
input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 1.15rem;
    height: 1.15rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--input-bg);
    cursor: pointer;
    position: relative;
    vertical-align: middle;
    transition: all 0.2s ease;
    outline: none;
}

input[type="checkbox"]:checked {
    background: var(--accent);
    border-color: var(--accent);
}

input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 2px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

input[type="checkbox"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim);
}

input::placeholder {
    color: var(--placeholder);
}

/* Decorative Line Transition */
.decorative-line {
    height: 1px;
    background: var(--accent-line);
    transition: background 0.3s ease;
}

.card:hover .decorative-line {
    background: var(--accent);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg);
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* Markdown Overrides */
.prose {
    color: var(--text-body);
    line-height: 1.6;
    font-size: 15px;
}

.prose h1, .prose h2, .prose h3 {
    color: var(--text-main);
    margin-top: 2.5em;
    margin-bottom: 1em;
}

.prose a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.prose a:hover {
    border-bottom-color: var(--accent);
}

.prose img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 2rem auto;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.prose img.article-image-loading {
    box-sizing: border-box;
    border: 1px solid var(--image-placeholder-border);
    background-color: var(--image-placeholder-base);
    background-image: linear-gradient(
        108deg,
        transparent 22%,
        var(--image-placeholder-sheen) 48%,
        transparent 74%
    );
    background-size: 220% 100%;
    animation: windblog-image-shimmer 1.15s ease-in-out infinite;
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--image-placeholder-border) 42%, transparent),
        0 0 24px color-mix(in srgb, var(--image-placeholder-border) 30%, transparent);
}

.prose img.article-image-loaded {
    border: 1px solid transparent;
    background: transparent;
    animation: none;
}

.prose img.article-image-error {
    border: 1px solid var(--image-placeholder-border);
    background-color: var(--image-placeholder-base);
    background-image: repeating-linear-gradient(
        135deg,
        transparent 0 12px,
        var(--image-placeholder-stripe) 12px 24px
    );
    animation: none;
}

@keyframes windblog-image-shimmer {
    from { background-position: 100% 0; }
    to { background-position: -120% 0; }
}

@media (prefers-reduced-motion: reduce) {
    .prose img.article-image-loading {
        animation: none;
    }
}

.prose blockquote {
    border-left: 2px solid var(--accent-line);
    background: var(--card-hover);
    padding: 1rem 1.5rem;
    font-style: italic;
    color: var(--text-main);
}

.prose code {
    background: var(--input-bg);
    color: var(--accent-dim);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
}

.prose table {
    display: block;
    width: max-content;
    max-width: 100%;
    margin: 1.75rem 0;
    overflow-x: auto;
    border-collapse: collapse;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.prose thead {
    background: var(--input-bg);
}

.prose th,
.prose td {
    min-width: 8rem;
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

.prose tbody tr:nth-child(even) {
    background: color-mix(in srgb, var(--card-hover) 65%, transparent);
}

/* Comments */
.comment-item {
    padding: 1.5rem;
    position: relative;
}

.comment-mini {
    padding: 1rem !important;
    margin-top: 0.5rem !important;
    background: rgba(var(--bg-rgb), 0.3) !important;
}

.comment-mini .comment-body {
    font-size: 13.5px !important;
}

.comment-footer {
    display: flex;
    justify-content: flex-end;
    margin-top: 0.75rem;
}

.comment-children {
    margin-left: 1.5rem;
    padding-left: 1.5rem;
    border-left: 1px solid var(--border);
    margin-top: 1rem;
    transition: all 0.3s ease;
}

@media (max-width: 768px) {
    .comment-children {
        margin-left: 0.5rem;
        padding-left: 0.5rem;
    }

    .comment-item {
        padding: 1rem !important;
    }

    .comment-mini {
        padding: 0.75rem !important;
    }
}

.comment-reply-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--accent-line);
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    transition: all 0.2s ease;
    cursor: pointer;
    line-height: 1;
}

.comment-reply-btn:hover {
    background: var(--accent);
    color: var(--accent-foreground);
    transform: scale(1.05);
}

.comment-reply-btn svg {
    width: 12px;
    height: 12px;
    stroke-width: 2.5;
}

.expand-replies-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 0.75rem;
    padding: 6px 12px;
    background: transparent;
    border: 1px dashed var(--accent-dim);
    border-radius: 6px;
    color: var(--accent);
    font-size: 11px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.2s ease;
}

.expand-replies-btn:hover {
    background: var(--accent-line);
    border-style: solid;
    border-color: var(--accent);
}

.load-more-container {
    display: flex;
    justify-content: center;
    padding: 2rem 0;
}

.btn-load-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 2rem;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-size: 14px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-load-more:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-line);
}

.btn-load-more:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.comment-shell {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 2rem;
}

/* Typography & Contrast Improvements - Dark Mode Optimized */
body {
    color: var(--text-body);
    line-height: 1.8;
}

:where(a, button, input, select, textarea, [tabindex]):focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* Keep legacy utility classes readable while templates migrate to theme tokens. */
.text-gray-600 { color: var(--text-muted) !important; }
.text-gray-500 { color: var(--text-meta) !important; }
.text-gray-400 { color: var(--text-body) !important; }
.text-gray-300 { color: var(--text-main) !important; }

.brand-initial {
    color: var(--accent-foreground);
}

h1, h2, h3, h4 {
    color: var(--text-main);
    font-weight: 800;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; }

h2 {
    font-size: 2rem;
    padding-bottom: 0.5rem;
}
h3 { font-size: 1.5rem; }

/* Unified Markdown Protocol Styles - Synced with Flutter */
.md-region {
    display: flex;
    gap: 12px;
    margin: 16px 0;
    padding: 16px;
    border-left: 4px solid var(--accent);
    background: var(--card-hover);
    border-radius: 4px;
}

.md-region-icon, .md-callout-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.md-region-content, .md-callout-content {
    flex: 1;
    font-weight: 400;
    font-size: 14px;
    line-height: 1.5;
}

/* Tip / Success */
.md-region-tip, .md-region-success {
    border-left-color: #10b981;
    background: rgba(16, 185, 129, 0.05);
}

.md-region-tip .md-region-icon::before, .md-region-success .md-region-icon::before {
    content: "✓";
    color: #10b981;
    font-weight: bold;
}

/* Warning */
.md-region-warning {
    border-left-color: #f59e0b;
    background: rgba(245, 158, 11, 0.05);
}
.md-region-warning .md-region-icon::before { content: "⚠"; color: #f59e0b; }

/* Danger / Error */
.md-region-danger, .md-region-error {
    border-left-color: #ef4444;
    background: rgba(239, 68, 68, 0.05);
}

.md-region-danger .md-region-icon::before, .md-region-error .md-region-icon::before {
    content: "✕";
    color: #ef4444;
}

/* Sidebar Price Highlight - Darker & Solid for Contrast */
.sidebar-price-tag {
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 1.25rem;
    padding: 2rem 1.5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.sidebar-price-value {
    font-size: 3rem;
    line-height: 1;
    font-weight: 900;
    color: var(--accent);
    font-family: var(--font-mono);
}

.sidebar-price-unit {
    font-size: 0.875rem;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.6;
    text-transform: uppercase;
}

/* Premium Paid Content Card - Minimalist Glassmorphism */
.md-region-premium-card {
    margin: 4rem 0;
    padding: 3rem;
    background: var(--card-bg);
    border: 1px solid var(--accent);
    border-radius: 1.5rem;
    box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.4);
    position: relative;
    overflow: hidden;
}

.md-region-premium-card::before {
    display: none; /* 移除浮夸的炫技光圈 */
}

.premium-card-body {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.md-region-premium-card.full-hide .premium-card-body {
    flex-direction: column;
    text-align: center;
    gap: 2rem;
}

.premium-icon {
    flex-shrink: 0;
    width: 72px;
    height: 72px;
    background: rgba(var(--accent-rgb), 0.1);
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.premium-lock-mark {
    display: block;
    position: relative;
    width: 28px;
    height: 30px;
}

.premium-lock-mark::before {
    content: "";
    position: absolute;
    top: 0;
    left: 6px;
    width: 16px;
    height: 16px;
    border: 3px solid currentColor;
    border-bottom: 0;
    border-radius: 10px 10px 0 0;
}

.premium-lock-mark::after {
    content: "";
    position: absolute;
    right: 2px;
    bottom: 0;
    left: 2px;
    height: 18px;
    border-radius: 4px;
    background: currentColor;
}

.premium-text {
    flex: 1;
}

.premium-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 0.5rem !important;
}

.premium-desc {
    font-size: 0.9375rem;
    color: var(--text-body);
    line-height: 1.6;
    opacity: 0.7;
    margin: 0 !important;
}

/* Header Meta Spacing */
.post-meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.post-meta-label {
    font-size: 10px;
    font-weight: 800;
    color: var(--text-meta);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.post-meta-value {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-main);
}

/* Comment Section Overlay */
.comment-form-container {
    position: relative;
}

.comment-auth-overlay {
    position: absolute;
    inset: 0;
    background: rgba(var(--bg-rgb, 10, 12, 16), 0.6);
    backdrop-filter: blur(4px);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    border-radius: var(--radius-md);
    border: 1px dashed var(--border);
}

.comment-auth-overlay p {
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}
.md-region-info .md-region-icon::before { content: "ℹ"; color: #3b82f6; }

/* Callouts - Card Style with Header */
.md-callout {
    display: flex;
    flex-direction: column;
    margin: 12px 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.md-callout-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    color: #fff;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1.1px;
    text-transform: uppercase;
}

.md-callout-header .md-callout-icon {
    width: 14px;
    height: 14px;
    font-size: 12px;
}

.md-callout-content {
    padding: 12px;
    font-size: 13px;
    line-height: 1.5;
    background: var(--card-hover);
    color: var(--text-main);
}

/* Callout Colors */
.md-callout-info {
    border-color: rgba(59, 130, 246, 0.2);
}

.md-callout-info .md-callout-header {
    background: rgba(59, 130, 246, 0.9);
}
.md-callout-info .md-callout-icon::before { content: "ℹ"; }

.md-callout-warning {
    border-color: rgba(245, 158, 11, 0.2);
}

.md-callout-warning .md-callout-header {
    background: rgba(245, 158, 11, 0.9);
}
.md-callout-warning .md-callout-icon::before { content: "⚠"; }

.md-callout-danger {
    border-color: rgba(239, 68, 68, 0.2);
}

.md-callout-danger .md-callout-header {
    background: rgba(239, 68, 68, 0.9);
}
.md-callout-danger .md-callout-icon::before { content: "✕"; }

.md-callout-question {
    border-color: rgba(139, 92, 246, 0.2);
}

.md-callout-question .md-callout-header {
    background: rgba(139, 92, 246, 0.9);
}
.md-callout-question .md-callout-icon::before { content: "?"; font-weight: 900; }

/* Multi-column layout */
.md-columns {
    display: flex;
    gap: 8px;
    margin: 16px 0;
}

.md-columns > * {
    flex: 1;
    padding: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
}

mark {
    background: rgba(254, 240, 138, 0.3);
    color: #fde047;
    padding: 0 4px;
    border-radius: 2px;
    font-weight: 500;
}

kbd {
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-bottom: 2px solid var(--border-hover);
    padding: 2px 4px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: bold;
    color: var(--text-main);
    box-shadow: 0 1px 0 var(--border);
}

.md-progress {
    display: inline-block;
    width: 120px;
    height: 6px;
    border-radius: 3px;
    background: var(--input-bg);
    overflow: hidden;
    appearance: none;
    vertical-align: middle;
}

.md-progress::-webkit-progress-bar {
    background: var(--input-bg);
}

.md-progress::-webkit-progress-value {
    background: var(--accent);
    border-radius: 3px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
    border: 1px solid transparent;
}

.badge-p {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border-color: rgba(16, 185, 129, 0.2);
}

.badge-w {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
    border-color: rgba(245, 158, 11, 0.2);
}

.badge-e {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.2);
}

.badge-default {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    border-color: rgba(59, 130, 246, 0.2);
}

/* AI Summary Badge (GitHub Flat Style) */
.badge-ai {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0 10px;
    background: rgba(56, 139, 253, 0.15);
    border: 1px solid rgba(56, 139, 253, 0.4);
    border-radius: 2em;
    color: #58a6ff;
    font-size: 12px;
    font-weight: 600;
    line-height: 22px;
    cursor: default;
    user-select: none;
    transition: none;
}

.badge-ai svg {
    width: 14px;
    height: 14px;
}

.light .badge-ai {
    background: #ddf4ff;
    border-color: rgba(9, 105, 218, 0.2);
    color: #0969da;
}

/* Category and Tag Badges */
.badge-category, .badge-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 2px 12px;
    border-radius: 2em;
    font-size: 11px;
    font-weight: 700;
    line-height: 20px;
    transition: all 0.2s ease;
    cursor: pointer;
    user-select: none;
    text-decoration: none !important;
}

.badge-category {
    background: rgba(56, 139, 253, 0.1);
    color: #58a6ff;
    border: 1px solid rgba(56, 139, 253, 0.2);
}

.badge-category:hover {
    background: rgba(56, 139, 253, 0.2);
    border-color: rgba(56, 139, 253, 0.4);
}

.badge-tag {
    background: var(--tag-bg);
    color: var(--tag-text);
    border: 1px solid var(--tag-border);
}

.badge-tag:hover {
    background: var(--tag-bg-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.badge-category svg, .badge-tag svg {
    width: 12px;
    height: 12px;
    stroke-width: 2.5;
}

.light .badge-category {
    background: #ddf4ff;
    color: #0969da;
    border-color: rgba(9, 105, 218, 0.2);
}

.light .badge-tag {
    background: var(--tag-bg);
    color: var(--tag-text);
    border-color: var(--tag-border);
}

/* Visitor identity and arithmetic challenge share the comment editor's visual language. */
.comment-identity-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.comment-field { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.comment-field label { font-size: 13px; font-weight: 600; color: var(--text-main); }
.comment-required { color: var(--accent); }
.comment-optional { color: var(--text-meta); font-size: 11px; font-weight: 400; margin-left: 4px; }
.comment-field input { width: 100%; min-width: 0; height: 44px; padding: 10px 14px; background: var(--input-bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text-main); font-size: 14px; outline: none; transition: border-color .2s, box-shadow .2s; }
.comment-field input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
.comment-field input::placeholder { color: var(--text-meta); opacity: .75; }
.comment-field-note { grid-column: 1 / -1; color: var(--text-meta); font-size: 12px; margin: -4px 0 0; }
.comment-captcha-row { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.comment-captcha-question { display: flex; align-items: center; justify-content: center; min-height: 44px; min-width: 126px; padding: 10px 16px; border: 1px dashed var(--border); border-radius: 8px; background: var(--card-bg); color: var(--accent); font: 600 14px ui-monospace, monospace; }
.comment-captcha-row input { width: 140px; }
.comment-captcha-refresh { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; color: var(--text-meta); font-size: 12px; transition: color .2s, border-color .2s; }
.comment-captcha-refresh:hover { border-color: var(--accent); color: var(--accent); }
.comment-meta > div { flex-wrap: wrap; }
.comment-client { display: inline-flex; align-items: center; gap: 7px; color: var(--text-meta); font-size: 11px; }
.comment-client i { font-size: 13px; }
.comment-client-divider { opacity: .45; }
.comment-author-link:hover { text-decoration: underline; }
@media (max-width: 640px) { .comment-identity-grid { grid-template-columns: 1fr; gap: 14px; } .comment-captcha-row { gap: 8px; } .comment-captcha-row input { flex: 1; min-width: 100px; } }