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

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --border-color: #30363d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --success: #3fb950;
    --warning: #d29922;
    --danger: #f85149;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.app {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    padding: 20px 0;
}

.logo {
    padding: 0 20px 20px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.logo h1 {
    font-size: 24px;
    color: var(--accent);
    margin-bottom: 4px;
}

.logo p {
    font-size: 12px;
    color: var(--text-secondary);
}

.nav-menu {
    padding: 0 12px;
}

.nav-category {
    margin-bottom: 24px;
}

.nav-category-title {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0 8px;
    margin-bottom: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 10px 12px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 14px;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
    text-align: left;
    gap: 10px;
}

.nav-item:hover {
    background: var(--bg-tertiary);
}

.nav-item.active {
    background: var(--bg-tertiary);
    color: var(--accent);
}

.nav-item .icon {
    font-size: 16px;
    width: 24px;
    text-align: center;
}

.content {
    flex: 1;
    margin-left: 260px;
    padding: 40px;
    min-height: 100vh;
}

.tool-container {
    max-width: 900px;
    margin: 0 auto;
}

.tool-header {
    margin-bottom: 32px;
}

.tool-header h2 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
}

.tool-header p {
    color: var(--text-secondary);
}

.tool-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 20px;
}

.tool-card h3 {
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

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

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

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

.result-box {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 16px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 13px;
    word-break: break-all;
    position: relative;
}

.result-box .copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 8px;
    font-size: 12px;
}

.output-section {
    margin-top: 20px;
}

.output-section h4 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

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

.copy-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent);
}

.copy-btn.copied {
    background: var(--success);
    color: #fff;
    border-color: var(--success);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.info-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 16px;
}

.info-item .label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.info-item .value {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

.strength-meter {
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 8px;
}

.strength-bar {
    height: 100%;
    transition: width 0.3s, background-color 0.3s;
}

.strength-weak { background: var(--danger); width: 25%; }
.strength-fair { background: var(--warning); width: 50%; }
.strength-good { background: #58a6ff; width: 75%; }
.strength-strong { background: var(--success); width: 100%; }

.code-output {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 16px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 13px;
    white-space: pre-wrap;
    overflow-x: auto;
}

.search-input {
    margin-bottom: 16px;
}

.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
}

.data-table td {
    font-size: 14px;
}

.data-table tr:hover td {
    background: var(--bg-tertiary);
}

.status-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-1xx { background: #1a1a2e; color: #8b8bff; }
.status-2xx { background: #1a2e1a; color: var(--success); }
.status-3xx { background: #2e2a1a; color: var(--warning); }
.status-4xx { background: #2e1a1a; color: var(--danger); }
.status-5xx { background: #2e1a1a; color: var(--danger); }

.http-method {
    font-weight: 600;
    color: var(--accent);
}

.checkbox-group,
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.checkbox-item,
.radio-item {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.checkbox-item input,
.radio-item input {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .sidebar {
        width: 60px;
        overflow: visible;
    }
    .logo h1, .logo p, .nav-item span {
        display: none;
    }
    .nav-item {
        justify-content: center;
    }
    .content {
        margin-left: 60px;
        padding: 20px;
    }
    .two-col {
        grid-template-columns: 1fr;
    }
}