* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #2c3e50;
    --background-color: #f5f6fa;
    --card-background: #ffffff;
    --text-color: #333333;
    --text-muted: #7f8c8d;
    --border-color: #dcdde1;
    --success-color: #27ae60;
    --error-color: #e74c3c;
    --warning-color: #f39c12;
    --sidebar-width: 250px;
    --header-height: 60px;
    --input-background: #ffffff;
    --result-background: #f8f9fa;
}

/* Dark Mode */
[data-theme="dark"] {
    --primary-color: #5dade2;
    --primary-dark: #3498db;
    --secondary-color: #1a252f;
    --background-color: #121212;
    --card-background: #1e1e1e;
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
    --border-color: #333333;
    --success-color: #2ecc71;
    --error-color: #e74c3c;
    --warning-color: #f39c12;
    --input-background: #2a2a2a;
    --result-background: #252525;
}

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--secondary-color);
    color: white;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    z-index: 1000;
}

.sidebar-header {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    transition: opacity 0.3s ease;
}

/* Sidebar Collapse Button (Desktop) */
.sidebar-collapse-btn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    border: none;
    background-color: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
    border-radius: 4px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.sidebar-collapse-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Sidebar Collapsed State (Desktop only) */
@media (min-width: 769px) {
    .sidebar.collapsed {
        width: 70px;
    }

    .sidebar.collapsed .sidebar-header h1 {
        opacity: 0;
        width: 0;
        overflow: hidden;
    }

    .sidebar.collapsed .sidebar-collapse-btn {
        position: static;
        transform: none;
        margin: 0 auto;
    }

    .sidebar.collapsed .nav-link span:not(.nav-icon) {
        display: none;
    }

    .sidebar.collapsed .nav-link {
        justify-content: center;
        padding: 12px;
    }

    .sidebar.collapsed .nav-icon {
        margin-right: 0;
    }

    .sidebar.collapsed .sidebar-footer {
        padding: 10px;
    }

    .sidebar.collapsed .theme-toggle {
        flex-direction: column;
        gap: 5px;
        padding: 8px;
    }

    .sidebar.collapsed .theme-toggle-label {
        display: none;
    }

    .sidebar.collapsed .theme-toggle-switch {
        width: 36px;
        height: 20px;
    }

    .sidebar.collapsed .theme-toggle-switch::after {
        width: 16px;
        height: 16px;
    }

    [data-theme="dark"] .sidebar.collapsed .theme-toggle-switch::after {
        transform: translateX(16px);
    }

    body.sidebar-collapsed .main-content {
        margin-left: 70px;
        width: calc(100% - 70px);
    }
}

.nav-menu {
    list-style: none;
    padding: 10px 0;
    flex: 1;
    overflow-y: auto;
}

.nav-item {
    margin: 5px 10px;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-link.active {
    background-color: var(--primary-color);
    color: white;
}

.nav-icon {
    width: 30px;
    font-size: 1.2rem;
    margin-right: 10px;
    text-align: center;
}

/* Sidebar Toggle Button */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 1001;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1.2rem;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 30px;
    width: calc(100% - var(--sidebar-width));
    min-height: 100vh;
}

/* Page Container */
.page-container {
    max-width: 1400px;
    margin: 0 auto;
}

.page-title {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

[data-theme="dark"] .page-title {
    color: var(--text-color);
}

/* Tabs */
.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 20px;
    background-color: var(--card-background);
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    background-color: transparent;
    cursor: pointer;
    border-radius: 5px;
    font-size: 0.95rem;
    color: var(--text-muted);
    transition: all 0.2s ease;
}

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

.tab-btn.active {
    background-color: var(--primary-color);
    color: white;
}

/* Card */
.card {
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

[data-theme="dark"] .card-title {
    color: var(--text-color);
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.label-with-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.label-with-actions .form-label {
    margin-bottom: 0;
}

.label-with-help {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
}

.label-with-help .form-label {
    margin-bottom: 0;
}

.help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    background-color: var(--text-muted);
    color: var(--card-background);
    border-radius: 50%;
    font-size: 10px;
    font-weight: bold;
    cursor: pointer;
    position: relative;
    user-select: none;
}

.help-icon:hover,
.help-icon:focus {
    background-color: var(--primary-color);
}

.help-tooltip {
    display: none;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--secondary-color);
    color: white;
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: normal;
    white-space: nowrap;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    line-height: 1.6;
}

.help-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--secondary-color);
}

.help-icon:hover .help-tooltip,
.help-icon:focus .help-tooltip {
    display: block;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Consolas', 'Monaco', monospace;
    transition: border-color 0.2s ease;
    background-color: var(--input-background);
    color: var(--text-color);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-textarea.large {
    min-height: 250px;
}

.form-output {
    width: 100%;
    min-height: 250px;
    max-height: 500px;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Consolas', 'Monaco', monospace;
    background-color: var(--input-background);
    color: var(--text-color);
    overflow: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
    margin: 0;
}

.form-output .error-line {
    background-color: rgba(231, 76, 60, 0.2);
    color: #e74c3c;
    display: inline;
}

[data-theme="dark"] .form-output .error-line {
    background-color: rgba(231, 76, 60, 0.3);
    color: #ff6b6b;
}

.input-status {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: right;
    margin-top: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
}

.indent-control {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: auto;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.indent-control select {
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-background);
    color: var(--text-color);
    font-size: 0.85rem;
    cursor: pointer;
}

.align-center {
    align-items: center;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

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

.btn-secondary {
    background-color: var(--background-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

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

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #229954;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.85rem;
}

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

/* Error/Success Messages */
.message {
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.message-error {
    background-color: #fdeaea;
    color: #c0392b;
    border: 1px solid #f5c6cb;
    white-space: pre-wrap;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
}

.message-success {
    background-color: #d4edda;
    color: #1e8449;
    border: 1px solid #c3e6cb;
}

[data-theme="dark"] .message-error {
    background-color: rgba(231, 76, 60, 0.15);
    color: #e74c3c;
    border: 1px solid rgba(231, 76, 60, 0.3);
}

[data-theme="dark"] .message-success {
    background-color: rgba(46, 204, 113, 0.15);
    color: #2ecc71;
    border: 1px solid rgba(46, 204, 113, 0.3);
}

/* Result Display */
.result-box {
    background-color: var(--result-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    font-family: 'Consolas', 'Monaco', monospace;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 400px;
    overflow-y: auto;
    color: var(--text-color);
}

/* Two Column Layout */
.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* Arrow Indicator */
.arrow-indicator {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
    color: var(--text-muted);
    font-size: 1.5rem;
}

/* Command Grid */
.command-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
}

.command-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px 8px;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.command-item:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.command-cmd {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.7rem;
    color: var(--primary-color);
    margin-bottom: 2px;
}

.command-item:hover .command-cmd {
    color: white;
}

.command-icon {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.command-label {
    font-size: 0.75rem;
    line-height: 1.2;
    word-break: keep-all;
}

/* Command Card (for other uses) */
.command-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 10px;
}

.command-info {
    flex: 1;
}

.command-name {
    font-family: 'Consolas', 'Monaco', monospace;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.command-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 5px;
}

.copy-btn {
    padding: 8px 15px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

/* Diff Display */
.diff-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.diff-result {
    background-color: var(--result-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    font-family: 'Consolas', 'Monaco', monospace;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 500px;
    overflow-y: auto;
    line-height: 1.6;
    color: var(--text-color);
}

.diff-added {
    background-color: #d4edda;
    color: #155724;
}

.diff-removed {
    background-color: #f8d7da;
    color: #721c24;
}

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

[data-theme="dark"] .diff-added {
    background-color: rgba(46, 204, 113, 0.2);
    color: #2ecc71;
}

[data-theme="dark"] .diff-removed {
    background-color: rgba(231, 76, 60, 0.2);
    color: #e74c3c;
}

.diff-stats {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.diff-stat {
    padding: 10px 15px;
    background-color: var(--result-background);
    border-radius: 8px;
    font-size: 0.9rem;
}

/* Compare (Side-by-side diff) */
.compare-input-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 20px;
}

.compare-input-panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.compare-input-panel .form-textarea {
    height: 400px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
}

.compare-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.compare-panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

.compare-editor-wrapper {
    display: flex;
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    height: 400px;
}

.compare-gutter {
    width: 40px;
    background-color: var(--result-background);
    border-right: 1px solid var(--border-color);
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    line-height: 1.5;
    padding: 10px 0;
    text-align: right;
    overflow-y: auto;
    overflow-x: hidden;
    flex-shrink: 0;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}

.compare-gutter::-webkit-scrollbar {
    display: none; /* Chrome/Safari/Opera */
}

.compare-gutter-line {
    padding: 0 8px 0 4px;
    color: var(--text-muted);
    height: 19.5px;
}

.compare-gutter-removed {
    background-color: rgba(231, 76, 60, 0.2);
    color: var(--error-color);
}

.compare-gutter-added {
    background-color: rgba(46, 204, 113, 0.2);
    color: var(--success-color);
}

.compare-gutter-empty {
    background-color: var(--border-color);
    opacity: 0.3;
}

.compare-editor {
    flex: 1;
    min-width: 0;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    line-height: 1.5;
    padding: 10px;
    background-color: var(--input-background);
    color: var(--text-color);
    white-space: pre;
    overflow-x: auto;
    overflow-y: auto;
    outline: none;
    position: relative;
    z-index: 2;
}

.compare-line {
    height: 19.5px;
    white-space: pre;
}

.compare-line-removed {
    background-color: rgba(231, 76, 60, 0.15);
}

.compare-line-added {
    background-color: rgba(46, 204, 113, 0.15);
}

.compare-line-empty {
    background-color: var(--border-color);
    opacity: 0.2;
}

[data-theme="dark"] .compare-line-removed {
    background-color: rgba(231, 76, 60, 0.2);
}

[data-theme="dark"] .compare-line-added {
    background-color: rgba(46, 204, 113, 0.2);
}

/* Replacer */
.replacer-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.replacer-controls .form-group {
    margin-bottom: 0;
}

.replacer-options {
    grid-column: 1 / -1;
    display: flex;
    gap: 20px;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-color);
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.replacer-stats {
    margin-bottom: 15px;
    color: var(--text-color);
}

.replacer-stat {
    font-size: 0.95rem;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 4px 0;
}

.replacer-result-box {
    background-color: var(--result-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    font-family: 'Consolas', 'Monaco', monospace;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 400px;
    overflow-y: auto;
    line-height: 1.6;
    color: var(--text-color);
}

.search-highlight {
    background-color: #fff3cd;
    color: #856404;
    padding: 1px 2px;
    border-radius: 2px;
}

[data-theme="dark"] .search-highlight {
    background-color: rgba(255, 193, 7, 0.3);
    color: #ffc107;
}

.replace-highlight {
    background-color: #d4edda;
    color: #155724;
    padding: 1px 2px;
    border-radius: 2px;
}

[data-theme="dark"] .replace-highlight {
    background-color: rgba(46, 204, 113, 0.3);
    color: #2ecc71;
}

.match-positions {
    display: inline-flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px;
    margin-left: 8px;
    max-width: calc(100% - 120px);
}

.match-position {
    background-color: var(--result-background);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 0.75rem;
    font-family: 'Consolas', 'Monaco', monospace;
    color: var(--text-muted);
    white-space: nowrap;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    background-color: var(--secondary-color);
    flex-shrink: 0;
}

/* Dark Mode Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background-color: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.theme-toggle-icon {
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.theme-toggle-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    flex: 1;
}

.theme-toggle-switch {
    width: 44px;
    height: 24px;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    position: relative;
    transition: background-color 0.3s ease;
    flex-shrink: 0;
}

.theme-toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background-color: white;
    border-radius: 50%;
    transition: transform 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .theme-toggle-switch {
    background-color: var(--primary-color);
}

[data-theme="dark"] .theme-toggle-switch::after {
    transform: translateX(20px);
}

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

.diff-stat-value {
    font-weight: 600;
    margin-left: 5px;
}

/* Hash Results */
.hash-result {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
    background-color: var(--result-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 10px;
}

.hash-label {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 100px;
}

.hash-value {
    flex: 1;
    font-family: 'Consolas', 'Monaco', monospace;
    word-break: break-all;
    margin: 0 15px;
}

/* IP Calculator Results */
.ip-result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.ip-result-item {
    padding: 15px;
    background-color: var(--result-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.ip-result-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.ip-result-value {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 1.1rem;
    color: var(--text-color);
    word-break: break-all;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 15px 25px;
    background-color: var(--secondary-color);
    color: white;
    border-radius: 8px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 2000;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

/* Curl*/
.header-row {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.header-row input {
    flex: 1;
}

.header-row button {
    flex-shrink: 0;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: block;
    }

    .sidebar-collapse-btn {
        display: none;
    }

    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 70px 15px 15px;
    }

    .sidebar-footer {
        flex-shrink: 0;
    }

    .two-column {
        grid-template-columns: 1fr;
    }

    .diff-container {
        grid-template-columns: 1fr;
    }

    .compare-input-container {
        grid-template-columns: 1fr;
    }

    .compare-input-panel .form-textarea {
        height: 250px;
    }

    .compare-container {
        grid-template-columns: 1fr;
    }

    .compare-editor-wrapper {
        height: 250px;
    }

    .tabs {
        justify-content: center;
    }

    .tab-btn {
        padding: 8px 15px;
        font-size: 0.85rem;
    }

    .page-title {
        font-size: 1.5rem;
        text-align: center;
    }

    .hash-result {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .hash-value {
        margin: 0;
    }

    .command-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 6px;
    }

    .command-item {
        padding: 10px 6px;
    }

    .command-icon {
        font-size: 1.3rem;
    }

    .command-label {
        font-size: 0.7rem;
    }

    .command-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .copy-btn {
        width: 100%;
        text-align: center;
    }

    .header-row {
        flex-direction: column;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Tab Content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Flex utilities */
.flex {
    display: flex;
}

.flex-wrap {
    flex-wrap: wrap;
}

.justify-between {
    justify-content: space-between;
}

.gap-10 {
    gap: 10px;
}

.gap-20 {
    gap: 20px;
}

.mt-5 {
    margin-top: 5px;
}

.mt-10 {
    margin-top: 10px;
}

.mt-20 {
    margin-top: 20px;
}

.mb-10 {
    margin-bottom: 10px;
}

.mb-20 {
    margin-bottom: 20px;
}

/* UUID Generator */
.uuid-list {
    font-family: 'Consolas', 'Monaco', monospace;
    background-color: var(--result-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    max-height: 400px;
    overflow-y: auto;
    color: var(--text-color);
}

.uuid-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    border-bottom: 1px solid var(--border-color);
}

.uuid-item:last-child {
    border-bottom: none;
}

.uuid-item:hover {
    background-color: var(--border-color);
}

/* Input Group */
.input-group {
    display: flex;
    gap: 10px;
}

.input-group .form-input {
    flex: 1;
}

/* Number Input Styling */
input[type="number"] {
    -moz-appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Viewer / Markdown Preview */
.viewer-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.viewer-input-group,
.viewer-output-group {
    min-width: 0;
    margin-bottom: 0;
}

@media (max-width: 900px) {
    .viewer-container {
        grid-template-columns: 1fr;
    }
}

.markdown-preview {
    background-color: var(--result-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    height: 500px;
    overflow-y: auto;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    resize: vertical;
}

.viewer-input-group .form-textarea {
    height: 500px;
    resize: vertical;
}

.markdown-preview h1,
.markdown-preview h2,
.markdown-preview h3,
.markdown-preview h4,
.markdown-preview h5,
.markdown-preview h6 {
    margin-top: 24px;
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.25;
    color: var(--text-color);
}

.markdown-preview h1 {
    font-size: 2em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3em;
}

.markdown-preview h2 {
    font-size: 1.5em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.3em;
}

.markdown-preview h3 {
    font-size: 1.25em;
}

.markdown-preview p {
    margin-bottom: 16px;
}

.markdown-preview a {
    color: var(--primary-color);
    text-decoration: none;
}

.markdown-preview a:hover {
    text-decoration: underline;
}

.markdown-preview code {
    background-color: var(--input-background);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9em;
}

.markdown-preview pre {
    background-color: var(--input-background);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: 16px;
}

.markdown-preview pre code {
    background-color: transparent;
    padding: 0;
    font-size: 0.85em;
    line-height: 1.5;
    color: #e6e6e6;
}

[data-theme="light"] .markdown-preview pre code {
    color: #333;
}

[data-theme="dark"] .markdown-preview pre {
    background-color: #1e1e1e;
    border: 1px solid #333;
}

.markdown-preview blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 16px;
    margin: 16px 0;
    color: var(--text-muted);
}

.markdown-preview ul,
.markdown-preview ol {
    padding-left: 2em;
    margin-bottom: 16px;
}

.markdown-preview li {
    margin-bottom: 4px;
}

.markdown-preview table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 16px;
}

.markdown-preview th,
.markdown-preview td {
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    text-align: left;
}

.markdown-preview th {
    background-color: var(--input-background);
    font-weight: 600;
}

.markdown-preview tr:nth-child(even) {
    background-color: var(--result-background);
}

.markdown-preview hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 24px 0;
}

.markdown-preview img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}


/* Offline/Fallback Banner */
.offline-banner {
    background-color: var(--warning-color);
    color: #1a1a1a;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-radius: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.offline-icon {
    font-size: 1.2rem;
}

.offline-text {
    flex: 1;
    font-size: 0.9rem;
}

.offline-details-btn {
    background-color: rgba(0, 0, 0, 0.15);
    border: none;
    padding: 5px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    color: #1a1a1a;
}

.offline-details-btn:hover {
    background-color: rgba(0, 0, 0, 0.25);
}

.offline-close-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0 5px;
    color: #1a1a1a;
    opacity: 0.7;
}

.offline-close-btn:hover {
    opacity: 1;
}

/* Built-in mode indicator */
.builtin-badge {
    display: inline-block;
    background-color: var(--warning-color);
    color: #1a1a1a;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 10px;
    vertical-align: middle;
    font-weight: 500;
}

/* Library Status Modal */
.library-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.library-modal-content {
    background-color: var(--card-background);
    border-radius: 10px;
    padding: 25px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.library-modal-title {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.library-item {
    display: flex;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.library-item:last-child {
    border-bottom: none;
}

.library-status-icon {
    width: 24px;
    font-size: 1rem;
    margin-right: 10px;
}

.library-name {
    flex: 1;
    color: var(--text-color);
}

.library-status {
    font-size: 0.85rem;
    padding: 3px 10px;
    border-radius: 4px;
}

.library-status.loaded {
    background-color: var(--success-color);
    color: white;
}

.library-status.builtin {
    background-color: var(--warning-color);
    color: #1a1a1a;
}

.library-status.loading {
    background-color: var(--primary-color);
    color: white;
}

.library-status.notloaded {
    background-color: var(--text-muted);
    color: white;
}

.library-modal-close {
    margin-top: 20px;
    width: 100%;
}

@media (max-width: 768px) {
    .offline-banner {
        flex-direction: column;
        text-align: center;
    }

    .offline-text {
        width: 100%;
    }
}

/* Loading Indicator */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    gap: 20px;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-text {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Downloader Page */
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-color);
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.dl-items-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    max-height: 500px;
    overflow-y: auto;
    width: 100%;
}

@media (max-width: 1200px) {
    .dl-items-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 900px) {
    .dl-items-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .dl-items-list {
        grid-template-columns: 1fr;
    }
}

.dl-item {
    background-color: var(--input-background);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 6px 8px;
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    min-width: 0;
    position: relative;
}

.dl-item-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4px;
}

.dl-item-header .checkbox-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
}

.dl-download-btn {
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    background-color: var(--primary-color);
    color: white;
    border: none;
}

.dl-download-btn:hover {
    background-color: var(--primary-hover);
    transform: scale(1.02);
}

.dl-item-url {
    margin-top: 4px;
    padding-top: 4px;
    border-top: 1px solid var(--border-color);
    font-size: 0.65rem;
    color: var(--text-muted);
    font-family: monospace;
    line-height: 1.3;
    display: flex;
    align-items: flex-start;
    gap: 4px;
}

.dl-item-url-text {
    flex: 1;
    word-break: break-all;
}

.dl-copy-btn {
    padding: 1px 4px;
    font-size: 0.6rem;
    flex-shrink: 0;
}

.dl-item-icon {
    font-size: 0.9rem;
}

.dl-item-name {
    font-size: 0.75rem;
    word-break: break-all;
    line-height: 1.3;
    margin-top: 2px;
}

.dl-item-type {
    font-size: 0.6rem;
    color: var(--text-muted);
    background-color: var(--border-color);
    padding: 1px 5px;
    border-radius: 6px;
    text-transform: uppercase;
}

.dl-item-preview {
    margin-top: 5px;
    padding-top: 5px;
    border-top: 1px solid var(--border-color);
}

.dl-item-preview img {
    max-width: 80px;
    max-height: 50px;
    object-fit: contain;
    border-radius: 3px;
    background-color: var(--border-color);
}

.dl-item-preview video {
    max-width: 120px;
    max-height: 70px;
    border-radius: 3px;
    background-color: #000;
}

.dl-item-preview audio {
    width: 100%;
    max-width: 200px;
    height: 26px;
}

.dl-pdf-preview iframe {
    width: 120px;
    height: 80px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
}

.dl-item-preview .preview-error {
    font-size: 0.65rem;
    color: var(--text-muted);
    font-style: italic;
}

.dl-status-card {
    background-color: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--primary-color);
}

.dl-status-header {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary-color);
    font-size: 0.95rem;
    font-weight: 600;
    padding-bottom: 10px;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.dl-status-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.dl-status-log {
    max-height: 200px;
    overflow-y: auto;
    font-family: monospace;
    font-size: 0.85rem;
}

.dl-status-entry {
    padding: 4px 0;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
}

.dl-status-entry:last-child {
    border-bottom: none;
}

.dl-status-time {
    color: var(--text-muted);
    margin-right: 8px;
}

.dl-error-card {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error-color);
}

.dl-error-message {
    color: var(--error-color);
    font-size: 0.95rem;
    padding: 5px 0;
}

/* GitHub Downloader Styles */
.github-ref-list {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.github-ref-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--card-background);
}

.github-ref-item:last-child {
    border-bottom: none;
}

.github-ref-item:hover {
    background-color: var(--hover-background);
}

.github-ref-name {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.github-ref-icon {
    flex-shrink: 0;
}

.github-ref-badge {
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    background-color: var(--primary-color);
    color: white;
    margin-left: 8px;
}

.github-ref-badge.prerelease {
    background-color: var(--warning-color, #f59e0b);
}

.github-release-group {
    border-bottom: 2px solid var(--border-color);
}

.github-release-group:last-child {
    border-bottom: none;
}

.github-release-header {
    padding: 12px;
    background-color: var(--result-background);
    border-bottom: 1px solid var(--border-color);
}

.github-release-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    flex-wrap: wrap;
}

.github-release-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: normal;
    margin-left: auto;
}

.github-release-items {
    padding-left: 20px;
}

.github-release-items .github-ref-item {
    padding: 8px 12px;
}

.github-asset-size {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 8px;
}

@media (max-width: 768px) {
    .checkbox-group {
        flex-direction: column;
        gap: 10px;
    }

    .github-release-date {
        display: block;
        width: 100%;
        margin-left: 0;
        margin-top: 4px;
    }

    .github-release-items {
        padding-left: 10px;
    }
}