:root {
    --panel-soft: #f8fafc;
    --primary-hover: #1d4ed8;
    --success: #15803d;
    --success-hover: #166534;
}

.tool-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 22px;
}

.tool-header h1 {
    font-size: 30px;
    line-height: 1.2;
    margin: 0 0 8px;
}

.tool-header p {
    max-width: 820px;
    margin: 0;
    color: var(--muted);
    line-height: 1.55;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.panel,
.stats {
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--panel);
    box-shadow: var(--shadow);
}

.panel__header {
    border-bottom: 1px solid var(--border);
    padding: 15px 18px;
}

.panel__header h2 {
    font-size: 17px;
    margin: 0;
}

.panel__body {
    display: grid;
    gap: 14px;
    padding: 18px;
}

.text-area {
    width: 100%;
    min-height: 360px;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 14px;
    color: var(--text);
    font: 15px/1.45 "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    resize: vertical;
}

.text-area:focus {
    border-color: var(--primary);
    outline: 3px solid rgba(37, 99, 235, 0.16);
}

.text-area--output {
    background: var(--panel-soft);
}

.options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 8px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--panel-soft);
    padding: 12px;
}

.options label {
    color: #344054;
    font-size: 14px;
}

.actions {
    display: flex;
    gap: 10px;
}

.button {
    min-height: 42px;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 0 16px;
    color: var(--text);
    background: #ffffff;
    cursor: pointer;
    font-weight: 700;
}

.button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.button--primary {
    flex: 1;
    background: var(--primary);
    color: #ffffff;
}

.button--primary:hover:not(:disabled) {
    background: var(--primary-hover);
}

.button--success {
    flex: 1;
    background: var(--success);
    color: #ffffff;
}

.button--success:hover:not(:disabled) {
    background: var(--success-hover);
}

.button--secondary {
    border-color: var(--border);
}

.button--secondary:hover:not(:disabled) {
    background: #eef2f7;
}

.notice {
    margin: 0;
    border: 1px solid #86efac;
    border-radius: 6px;
    background: #dcfce7;
    color: #166534;
    padding: 10px 12px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    overflow: hidden;
    margin-top: 18px;
}

.stats div {
    display: grid;
    gap: 6px;
    background: var(--panel);
    padding: 18px;
    text-align: center;
}

.stats span {
    color: var(--muted);
    font-size: 14px;
}

.stats strong {
    font-size: 28px;
}

@media (max-width: 980px) {
    .tool-grid,
    .stats {
        grid-template-columns: 1fr;
    }
}