:root {
    color-scheme: light;
    --color-text: #1a1a1a;
    --color-bg: #ffffff;
    --color-border: #767676;
    --color-panel-bg: #f6f6f7;
    --color-primary: #0b4f8a;
    --color-primary-text: #ffffff;
    --color-warning-bg: #fff4e5;
    --color-warning-border: #8a5a00;
    --color-error-bg: #fdecea;
    --color-error-border: #8a1f11;
    --color-status-bg: #e7f5ec;
    --color-status-border: #1e6b3a;
    --focus-outline: 3px solid #0b4f8a;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    max-width: 100%;
    overflow-x: hidden;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.5;
}

.page {
    max-width: 960px;
    margin: 0 auto;
    padding: 1.5rem 1rem 3rem;
}

.page__header h1 {
    margin: 0 0 0.25rem;
    font-size: 1.75rem;
}

.page__lead {
    margin: 0 0 1rem;
    color: #444;
}

.warning {
    background: var(--color-warning-bg);
    border: 1px solid var(--color-warning-border);
    border-left-width: 6px;
    border-radius: 4px;
    padding: 0.75rem 1rem;
    margin: 0 0 1rem;
}

.noscript-note {
    background: var(--color-warning-bg);
    border: 1px solid var(--color-warning-border);
    border-radius: 4px;
    padding: 0.75rem 1rem;
}

.tool__controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 2rem;
    margin-bottom: 1rem;
}

.control-group {
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 0.5rem 0.75rem;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.25rem 1rem;
}

.control-group legend {
    font-weight: 600;
    padding: 0 0.25rem;
}

.control-group label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    min-height: 44px;
    cursor: pointer;
}

.control-group input[type="radio"] {
    width: 20px;
    height: 20px;
}

.tool__panels {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

@media (min-width: 720px) {
    .tool__panels {
        grid-template-columns: 1fr 1fr;
    }
}

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

.panel__label {
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.panel__label-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.5rem;
}

.panel__badge {
    font-size: 0.8rem;
    color: #555;
}

.panel__textarea {
    width: 100%;
    min-height: 220px;
    resize: vertical;
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.95rem;
    padding: 0.6rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-bg);
    color: var(--color-text);
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

.panel__textarea[readonly] {
    background: var(--color-panel-bg);
}

.hint {
    margin: 0.4rem 0 0;
    color: #555;
    font-size: 0.9rem;
}

.btn {
    font: inherit;
    border-radius: 6px;
    min-height: 44px;
    padding: 0.5rem 1.25rem;
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn--primary {
    background: var(--color-primary);
    color: var(--color-primary-text);
    border-color: var(--color-primary);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.btn__hint {
    font-weight: 400;
    font-size: 0.85em;
    opacity: 0.85;
}

.btn--secondary {
    background: var(--color-bg);
    color: var(--color-primary);
    border-color: var(--color-primary);
    margin-top: 0.6rem;
    align-self: flex-start;
}

.message {
    border-radius: 6px;
    font-weight: 500;
}

.message:empty {
    display: none;
}

.message--error {
    background: var(--color-error-bg);
    border: 1px solid var(--color-error-border);
    border-left-width: 6px;
    color: #5c0f07;
    padding: 0.75rem 1rem;
    margin-bottom: 0.75rem;
}

.message--status {
    background: var(--color-status-bg);
    border: 1px solid var(--color-status-border);
    border-left-width: 6px;
    color: #123d22;
    padding: 0.75rem 1rem;
}

a, button, input, textarea {
    outline-offset: 2px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: var(--focus-outline);
}