.tool-label {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        font-weight: 600;
        color: var(--text-light);
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: 12px;
    }
    .regex-input {
        flex: 1;
        padding: 12px 8px;
        border: none;
        background: transparent;
        font-family: 'SF Mono', monospace;
        font-size: 15px;
        color: var(--text-dark);
        outline: none;
    }
    .flags-input {
        width: 50px;
        padding: 12px 8px;
        border: none;
        border-inline-start: 1px solid var(--border-light);
        background: transparent;
        font-family: 'SF Mono', monospace;
        font-size: 15px;
        color: var(--primary);
        outline: none;
        text-align: center;
    }
    .flag-checkbox {
        display: flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        color: var(--text-medium);
        cursor: pointer;
    }
    .flag-checkbox code {
        background: var(--bg-light);
        padding: 2px 6px;
        border-radius: 4px;
        font-size: 12px;
        color: var(--primary);
    }
    .test-string-container {
        position: relative;
    }
    .tool-textarea {
        width: 100%;
        height: 200px;
        padding: 16px;
        border: 1px solid var(--border-light);
        border-radius: 8px;
        font-family: 'SF Mono', monospace;
        font-size: 14px;
        line-height: 1.6;
        resize: vertical;
        background: var(--bg-light);
        color: var(--text-dark);
    }
    .tool-textarea:focus {
        outline: none;
        border-color: var(--primary-light);
    }
    .tool-status {
        padding: 10px 16px;
        border-radius: 6px;
        font-size: 13px;
        margin-bottom: 16px;
        font-weight: 500;
    }
    .tool-status.error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
    .match-count {
        background: var(--primary);
        color: white;
        padding: 2px 10px;
        border-radius: 12px;
        font-size: 12px;
        margin-inline-start: auto;
    }
    .match-results {
        max-height: 300px;
        overflow-y: auto;
    }
    .match-item {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        padding: 12px;
        background: var(--bg-light);
        border-radius: 6px;
        margin-bottom: 8px;
        font-family: 'SF Mono', monospace;
        font-size: 13px;
    }
    .match-item:last-child { margin-bottom: 0; }
    .match-index {
        background: var(--primary-light);
        color: white;
        padding: 2px 8px;
        border-radius: 4px;
        font-size: 11px;
        flex-shrink: 0;
    }
    .match-text {
        background: #fef3c7;
        color: #92400e;
        padding: 2px 6px;
        border-radius: 4px;
        word-break: break-all;
    }
    .match-groups {
        font-size: 12px;
        color: var(--text-light);
        margin-top: 6px;
    }
    .match-groups span {
        background: #dbeafe;
        color: #1e40af;
        padding: 1px 6px;
        border-radius: 3px;
        margin-inline-end: 6px;
    }
    .patterns-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
    .pattern-btn {
        padding: 12px;
        border: 1px solid var(--border-light);
        background: var(--bg-white);
        border-radius: 8px;
        font-size: 13px;
        cursor: pointer;
        transition: all 0.2s;
        display: flex;
        align-items: center;
        gap: 8px;
        color: var(--text-medium);
    }
    .pattern-btn:hover {
        border-color: var(--primary-light);
        color: var(--primary);
        background: var(--bg-light);
    }
    .pattern-btn i { color: var(--primary-light); }
    @media (max-width: 768px) {
        .patterns-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 480px) {
        .patterns-grid { grid-template-columns: 1fr; }
    }