:root {
    --bg-primary: #2d2d2d;
    --bg-secondary: #252525;
    --bg-tertiary: #1e1e1e;
    --bg-hover: #3a3a3a;
    --bg-active: #454545;
    --border-color: #404040;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-tertiary: #707070;
    --accent-color: #007AFF;
    --accent-hover: #0056b3;
    --accent-text: #ffffff;
    --danger-color: #ff5f57;
    --danger-hover: #d93b30;
    --selection-bg: #0d52bf;
    --highlight-match-bg: rgba(255, 203, 107, 0.3);
    --highlight-match-text: inherit;

    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    --font-editor: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    --font-mono: 'SF Mono', 'Menlo', 'Monaco', 'Consolas', 'Liberation Mono', monospace;

    --sidebar-width: 280px;
    --min-sidebar-width: 220px;
    --max-sidebar-width: 600px;
    --titlebar-height: 44px;
    --toolbar-height: 42px;
    --statusbar-height: 26px;
    --border-radius: 6px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;

    --transition-fast: 0.15s ease-out;
    --transition-medium: 0.25s ease-out;
}

body.light-mode {
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f7;
    --bg-tertiary: #ffffff;
    --bg-hover: #eeeeee;
    --bg-active: #e0e0e0;
    --border-color: #dcdcdc;
    --text-primary: #202020;
    --text-secondary: #555555;
    --text-tertiary: #888888;
    --accent-color: #007AFF;
    --accent-hover: #0056b3;
    --accent-text: #ffffff;
    --danger-color: #ff3b30;
    --danger-hover: #d92c2c;
    --selection-bg: #007AFF;
    --highlight-match-bg: rgba(255, 211, 66, 0.4);
    --highlight-match-text: #333;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-ui);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: #363636;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
    transition: background-color var(--transition-medium);
    overflow: hidden;
}

.window {
    width: 100%;
    max-width: 1400px;
    height: 90vh;
    max-height: 900px;
    min-height: 500px;
    background: var(--bg-primary);
    border-radius: 10px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.3);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: background-color var(--transition-medium);
    border: 1px solid var(--border-color);
}

.titlebar {
    height: var(--titlebar-height);
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    user-select: none;
    flex-shrink: 0;
    position: relative;
}

.traffic-lights { display: flex; gap: var(--spacing-sm); }
.traffic-light { width: 12px; height: 12px; border-radius: 50%; border: 1px solid rgba(0,0,0,0.1); }
.close { background: #ff5f57; }
.minimize { background: #febc2e; }
.expand { background: #28c940; }

.window-title {
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.sidebar-toggle {
    display: none;
    background: none; border: none; color: var(--text-secondary); font-size: 18px; cursor: pointer; margin-right: var(--spacing-md);
}
.titlebar-theme-btn {
    margin-left: auto;
    font-size: 16px;
    padding: var(--spacing-xs);
}

.action-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 6px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    line-height: 1;
}
.action-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 18px;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    line-height: 1;
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.new-note-btn.icon-btn { color: var(--accent-color); }
.new-note-btn.icon-btn:hover { background: rgba(0, 122, 255, 0.15); color: var(--accent-hover); }


.content-area {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    min-width: var(--min-sidebar-width);
    max-width: var(--max-sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-medium), background-color var(--transition-medium), width var(--transition-fast);
    overflow: hidden;
    flex-shrink: 0;
}

.sidebar-header {
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    min-height: 50px;
}

.search-bar {
    flex-grow: 1;
    display: flex;
    align-items: center;
    position: relative;
    min-width: 0;
}

.search-input {
    flex-grow: 1;
    padding: 7px var(--spacing-sm) 7px 30px;
    border-radius: var(--border-radius);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 13px;
    transition: all var(--transition-fast);
    line-height: 1.4;
    min-width: 80px;
}
.search-input:focus { outline: none; border-color: var(--accent-color); background: var(--bg-tertiary); }
.search-input::placeholder { color: var(--text-tertiary); }
.search-icon { position: absolute; left: 9px; top: 50%; transform: translateY(-50%); color: var(--text-tertiary); font-size: 13px; }

.search-help {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    height: 100%;
}
.search-help-btn { background: none; border: none; color: var(--text-tertiary); cursor: pointer; font-size: 14px; padding: var(--spacing-xs); border-radius: 50%; line-height: 1; }
.search-help-btn:hover { color: var(--text-secondary); }
.search-help-tooltip {
    position: absolute; right: 0; top: calc(100% + 5px); width: 250px; background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: var(--spacing-md); box-shadow: 0 4px 12px rgba(0,0,0,0.25); z-index: 100; color: var(--text-primary); font-size: 12px; opacity: 0; pointer-events: none; transform: translateY(5px); transition: opacity var(--transition-fast), transform var(--transition-fast);
}
.search-help:hover .search-help-tooltip { opacity: 1; transform: translateY(0); pointer-events: auto; }
.search-help-tooltip h4 { margin-bottom: var(--spacing-sm); color: var(--accent-color); font-size: 13px; }
.search-help-tooltip ul { list-style: none; padding-left: 0; margin-bottom: var(--spacing-md); }
.search-help-tooltip li { margin-bottom: 6px; }
.search-help-tooltip code { background: var(--bg-secondary); padding: 2px 5px; border-radius: 4px; font-family: var(--font-mono); font-size: 11px; border: 1px solid var(--border-color); }
.search-help-tooltip p { font-style: italic; font-size: 11px; color: var(--text-secondary); }

.notes-list-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
    position: relative;
}

.notes-count {
    display: block;
    text-align: center;
    font-size: 11px;
    color: var(--text-tertiary);
    padding: var(--spacing-xs) 0 var(--spacing-sm);
    user-select: none;
}

.notes-list { list-style: none; }
.note-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: 5px;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    border: 1px solid transparent;
    user-select: none;
}
.note-item:hover { background: var(--bg-hover); }
.note-item.active { background: var(--selection-bg); color: var(--accent-text); border-color: var(--selection-bg); }
.note-item.active:hover { background: var(--selection-bg); }
.note-item.active .note-item-title,
.note-item.active .note-item-preview,
.note-item.active .timestamp { color: var(--accent-text); }

.note-item-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: var(--spacing-xs);
    transition: color var(--transition-fast);
}
.note-item-preview {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-height: 1.5em; line-height: 1.5; margin-bottom: var(--spacing-xs);
    transition: color var(--transition-fast);
}
.timestamp {
    font-size: 11px;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.highlight-match {
    background-color: var(--highlight-match-bg);
    color: var(--highlight-match-text);
    border-radius: 3px;
    padding: 1px 2px;
    box-shadow: 0 0 0 1px var(--highlight-match-bg);
}
.note-item.active .highlight-match {
    background-color: rgba(255, 255, 255, 0.3);
    color: var(--accent-text);
}

.sidebar-footer {
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
    min-height: 44px;
}
.import-file-input { display: none; }

.resize-handle {
    width: 5px;
    background: transparent;
    cursor: col-resize;
    flex-shrink: 0;
    position: relative;
    transition: background-color var(--transition-fast);
    z-index: 1;
}
.resize-handle:hover, .resize-handle.resizing { background: var(--accent-color); }
.resize-handle::before { content: ""; position: absolute; left: -5px; top: 0; width: 15px; height: 100%; }

.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.editor-placeholder {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-tertiary);
    text-align: center;
    padding: var(--spacing-xl);
    opacity: 0.7;
    user-select: none;
}
.placeholder-icon { font-size: 48px; margin-bottom: var(--spacing-lg); animation: float 3s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translateY(0px); } 50% { transform: translateY(-8px); } }
.editor-placeholder h2 { font-size: 18px; color: var(--text-secondary); margin-bottom: var(--spacing-sm); }
.editor-placeholder p { font-size: 14px; }

.editor-wrapper {
    flex: 1;
    display: none;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.editor-toolbar {
    height: var(--toolbar-height);
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    background: var(--bg-primary);
}
.toolbar-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    line-height: 1;
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.toolbar-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.toolbar-btn.active { background: var(--bg-active); color: var(--text-primary); }
.toolbar-btn.delete-note-btn { color: var(--danger-color); margin-left: auto; }
.toolbar-btn.delete-note-btn:hover { background: rgba(255, 95, 87, 0.1); color: var(--danger-hover); }
.toolbar-btn.export-note-btn { margin-left: var(--spacing-sm); }

.toolbar-separator {
    width: 1px;
    height: 20px;
    background: var(--border-color);
    margin: 0 var(--spacing-sm);
}

.editor-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    flex-direction: column;
}

.note-title {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    font-weight: 600;
    font-family: var(--font-editor);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-sm) 0;
    width: 100%;
    outline: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
    line-height: 1.3;
    flex-shrink: 0;
}
.note-title:focus { border-bottom-color: var(--accent-color); }
.note-title::placeholder { color: var(--text-tertiary); font-weight: 500; }

.note-body {
    flex: 1;
    outline: none;
    font-family: var(--font-mono);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    min-height: 100px;
    word-wrap: break-word;
}

.note-body:empty::before {
    content: attr(placeholder);
    color: var(--text-tertiary);
    pointer-events: none;
    display: block;
    font-family: var(--font-mono);
    font-size: 16px;
    line-height: 1.7;
}

.note-body h1, .note-body h2, .note-body h3,
.note-body h4, .note-body h5, .note-body h6 {
    font-family: var(--font-editor);
    font-weight: 600; margin: 1.4em 0 0.7em; line-height: 1.3; color: var(--text-primary);
}
.note-body h1 { font-size: 1.8em; }
.note-body h2 { font-size: 1.5em; }
.note-body h3 { font-size: 1.3em; }

.note-body a { color: var(--accent-color); text-decoration: none; }
.note-body a:hover { text-decoration: underline; }
.note-body blockquote {
    border-left: 3px solid var(--accent-color); padding-left: 1.2em; margin: 1.2em 0; color: var(--text-secondary); font-style: italic;
}
.note-body ul, .note-body ol { padding-left: 1.8em; margin: 1em 0; }
.note-body li { margin-bottom: 0.5em; }

.note-body code {
    font-family: var(--font-mono);
    background: var(--bg-hover);
    padding: 2px 5px;
    border-radius: 4px;
    font-size: 0.9em;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}
.note-body pre {
    background: var(--bg-primary); border: 1px solid var(--border-color); padding: 1em; border-radius: var(--border-radius); overflow-x: auto; margin: 1.2em 0; font-family: var(--font-mono); font-size: 0.9em; line-height: 1.5;
}
.note-body pre code { background: none; padding: 0; border: none; font-size: inherit; color: inherit; }
.note-body hr { border: none; border-top: 1px solid var(--border-color); margin: 2.5em 0; }
.note-body strong, .note-body b { font-weight: 600; }
.note-body em, .note-body i { font-style: italic; }
.note-body u { text-decoration: underline; }
.note-body s, .note-body strike { text-decoration: line-through; }


.editor-statusbar {
    height: var(--statusbar-height);
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
    font-size: 11px;
    color: var(--text-tertiary);
    flex-shrink: 0;
    background: var(--bg-primary);
}
.statistics { display: flex; gap: var(--spacing-lg); align-items: center;}
.statistic { display: flex; align-items: center; gap: var(--spacing-xs); }
.statistic i { font-size: 12px; color: var(--text-tertiary); }
.last-modified { white-space: nowrap; }

.search-results-view {
    flex: 1;
    display: none;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
}

.search-results-header {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    background-color: var(--bg-primary);
    line-height: 1.4;
}

.search-query-display {
    font-style: italic;
    color: var(--text-primary);
    font-weight: 600;
}

.search-results-list-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg) var(--spacing-xl);
}

.search-result-item {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.search-result-item:hover {
    background-color: var(--bg-hover);
    border-color: var(--accent-color);
}

.search-result-note-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.search-result-note-title .highlight-match {
    background-color: var(--highlight-match-bg);
    color: var(--highlight-match-text);
    font-weight: inherit;
    padding: 0 1px;
    border-radius: 2px;
}


.search-result-snippet {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    max-height: 6.4em;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    text-overflow: ellipsis;
    word-wrap: break-word;
}

.search-result-snippet .highlight-match {
    background-color: var(--highlight-match-bg);
    color: var(--highlight-match-text);
    font-weight: 600;
    padding: 1px 2px;
    border-radius: 3px;
}

.search-no-results {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: var(--text-tertiary);
    font-size: 16px;
    user-select: none;
}


.notification {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0,0,0,0.25);
    opacity: 0;
    transform: translateY(15px);
    transition: opacity var(--transition-medium), transform var(--transition-medium);
    z-index: 1000;
    max-width: 340px;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border: 1px solid var(--border-color);
}
.notification.show { opacity: 1; transform: translateY(0); }
.notification.error { background: var(--danger-color); color: var(--accent-text); border-color: var(--danger-hover); }
.notification.error .notification-icon i { color: var(--accent-text); }
.notification-icon i { font-size: 18px; line-height: 1; }
.notification-message { flex: 1; font-size: 13px; line-height: 1.4; }

::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.18); border-radius: 5px; border: 2px solid transparent; background-clip: content-box; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.28); }
body.light-mode ::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.18); border-color: var(--bg-secondary); }
body.light-mode ::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.28); }

::selection { background: var(--selection-bg); color: var(--accent-text); }

.overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 5;
    transition: opacity var(--transition-medium);
}
.overlay.active { display: block; opacity: 1; }

@media (max-width: 768px) {
    body { padding: 0; align-items: stretch; }
    .window { border-radius: 0; height: 100vh; max-height: none; border: none; }
    .titlebar { padding: 0 var(--spacing-md); }
    .sidebar {
        position: fixed;
        height: calc(100% - var(--titlebar-height));
        top: var(--titlebar-height);
        left: 0;
        z-index: 10;
        transform: translateX(-100%);
        width: 85%;
        max-width: 320px;
        border-right: 1px solid var(--border-color);
        box-shadow: 5px 0 15px rgba(0,0,0,0.2);
        min-width: unset;
        transition: transform var(--transition-medium), background-color var(--transition-medium);
    }
    .sidebar.active { transform: translateX(0); }
    .sidebar-toggle { display: block; margin-right: auto; margin-left: var(--spacing-md); }
    .resize-handle { display: none; }
    .content-area { flex-direction: column; }
    .main-area { width: 100%; flex: 1; }
    .editor-content { padding: var(--spacing-lg); }
    .note-title { font-size: 22px; }
    .note-body { font-size: 14px; line-height: 1.7; }
    .editor-toolbar { padding: 0 var(--spacing-sm); gap: 1px; }
    .toolbar-btn { width: 34px; height: 34px; }

    .editor-statusbar {
        height: auto;
        min-height: calc(var(--statusbar-height) - 4px);
        padding: 6px var(--spacing-md);
        flex-wrap: wrap;
        gap: var(--spacing-xs) var(--spacing-md);
        justify-content: space-between;
    }

    .statistics {
        gap: var(--spacing-md);
        flex-basis: auto;
    }

    .statistic,
    .last-modified {
        font-size: 9.8px;
        white-space: nowrap;
    }

    .statistics .reading-time {
        display: none;
    }

    .last-modified {
        text-align: right;
        flex-grow: 1;
    }

    .search-results-list-container { padding: var(--spacing-md); }
    .search-result-item { padding: var(--spacing-md); }
}

.about-container {
    position: relative;
    display: flex;
    align-items: center;
    margin-left: var(--spacing-sm);
}

.about-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    line-height: 1;
}

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

.about-tooltip {
    position: absolute;
    right: 0;
    top: calc(100% + 5px);
    width: 280px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    z-index: 100;
    color: var(--text-primary);
    font-size: 12px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(5px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    overflow: hidden;
}

.about-container:hover .about-tooltip {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.about-header {
    background: linear-gradient(to right, var(--accent-color), var(--accent-hover));
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--accent-text);
}

.about-icon {
    font-size: 22px;
    background: rgba(255, 255, 255, 0.2);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.about-header h4 {
    font-size: 18px;
    font-weight: 600;
    margin: 0;
}

.about-content {
    padding: var(--spacing-md);
}

.about-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.about-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.about-value {
    color: var(--text-primary);
}

.about-value a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
}

.about-value a:hover {
    text-decoration: underline;
}

.about-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.about-social a {
    color: var(--text-secondary);
    background: var(--bg-hover);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.about-social a:hover {
    color: var(--accent-text);
    background: var(--accent-color);
    transform: translateY(-2px);
}

.about-footer {
    background: var(--bg-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.copyright {
    color: var(--text-tertiary);
    font-size: 10px;
    margin: 0;
}