.regex-page {
    max-width: 1180px;
    margin: 0 auto;
}

.regex-card {
    padding: 24px;
}

.regex-input {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.regex-option-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 14px 0 20px;
}

.regex-option-row label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border: 1px solid #dbe1ea;
    border-radius: 999px;
    background: #f8fafc;
    color: #475569;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

.regex-textarea {
    min-height: 220px;
    resize: vertical;
    line-height: 1.7;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 14px;
}

.regex-btn-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.regex-btn-row .utility-btn {
    min-width: 126px;
    height: 46px;
    padding: 0 18px;
    border-radius: 14px;
    font-size: 14px;
    font-weight: 600;
}

.regex-btn-row .utility-btn-primary {
    background: #0f172a;
    border-color: #0f172a;
    color: #fff;
}

.regex-message {
    min-height: 22px;
    margin-top: 14px;
    font-size: 13px;
    font-weight: 600;
    color: #475569;
}

.regex-message.is-error {
    color: #dc2626;
}

.regex-message.is-success {
    color: #2563eb;
}

.regex-result-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
    gap: 18px;
    margin-top: 24px;
}

.regex-result-box {
    border: 1px solid #e5e7eb;
    border-radius: 20px;
    background: #fff;
    overflow: hidden;
}

.regex-result-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 14px 16px;
    border-bottom: 1px solid #f1f5f9;
    background: #f8fafc;
}

.regex-result-head h2 {
    margin: 0;
    font-size: 15px;
    color: #111827;
}

.regex-result-head span {
    font-size: 12px;
    font-weight: 700;
    color: #64748b;
}

.regex-preview {
    min-height: 260px;
    padding: 18px;
    line-height: 1.8;
    font-size: 14px;
    color: #334155;
    white-space: pre-wrap;
    word-break: break-word;
}

.regex-highlight {
    display: inline;
    border-radius: 5px;
    background: #fef3c7;
    color: #92400e;
    padding: 1px 3px;
    font-weight: 700;
}

.regex-result-code {
    margin: 0;
    min-height: 260px;
    padding: 18px;
    overflow: auto;
    background: #fff;
    color: #334155;
    line-height: 1.7;
    font-size: 13px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    white-space: pre-wrap;
    word-break: break-word;
}

.help-panel {
    margin-top: 32px;
}

.help-panel .help-box + .help-box {
    margin-top: 18px;
}

@media (max-width: 860px) {
    .regex-result-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .regex-card {
        padding: 18px;
    }

    .regex-btn-row {
        flex-direction: column;
    }

    .regex-btn-row .utility-btn {
        width: 100%;
        min-width: 100%;
        height: 44px;
    }
}