:root {
    --bg: #f6f7fb;
    --panel: #ffffff;
    --border: #d9deea;
    --text: #1f2937;
    --muted: #6b7280;
    --ok-bg: #ecfdf3;
    --ok-bd: #9fe3ba;
    --ok-tx: #166534;
    --warn-bg: #fff8e6;
    --warn-bd: #f3d27a;
    --warn-tx: #92400e;
    --err-bg: #fef2f2;
    --err-bd: #f3a6a6;
    --err-tx: #991b1b;
    --accent: #2563eb;
    --accent-soft: rgba(37, 99, 235, 0.08);
    --node: #eff6ff;
    --node-border: #93c5fd;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text);
    background: var(--bg);
}

.app {
    min-height: 100vh;
    display: grid;
    grid-template-rows: auto auto 1fr;
    gap: 16px;
    padding: 20px;
}

.header, .panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-text {
    min-width: 0;
    flex: 1;
}

.github-link {
    margin-left: auto;
    width: 52px;
    height: 52px;
    padding: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
    border: 1px solid #cbd5e1;
    border-radius: 14px;
    color: #111827;
    background: #f8fafc;
    text-decoration: none;
    flex-shrink: 0;
}

.github-link svg {
    display: block;
    width: 30px;
    height: 30px;
    fill: currentColor;
    overflow: visible;
}

.github-link:hover {
    transform: translateY(-1px);
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-soft);
    box-shadow: 0 12px 28px rgba(37, 99, 235, 0.16);
}


.header-logo {
    height: 52px;
    max-width: 180px;
    object-fit: contain;
    flex-shrink: 0;
}

.header h1 {
    margin: 0 0 6px;
    font-size: 1.4rem;
}

.header p {
    margin: 0;
    color: var(--muted);
    line-height: 1.5;
}

.header {
    padding: 18px 20px;
}

.header h1 {
    margin: 0 0 6px;
    font-size: 1.4rem;
}

.header p {
    margin: 0;
    color: var(--muted);
    line-height: 1.5;
}

.layout {
    display: grid;
    grid-template-columns: 1.05fr 1.2fr;
    gap: 16px;
    min-height: 0;
}

.panel {
    padding: 16px;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

.panel h2 {
    margin: 0 0 12px;
    font-size: 1rem;
}

.toolbar {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.mapping-help {
    margin: -4px 0 10px;
    color: var(--muted);
    font-size: 0.82rem;
}

.mapping-help code {
    font-family: "JetBrains Mono", ui-monospace, monospace;
    font-size: 0.82rem;
}

button {
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 10px;
    padding: 8px 12px;
    cursor: pointer;
    color: var(--text);
    font-weight: 600;
}

button:hover {
    border-color: var(--accent);
    color: var(--accent);
}

textarea {
    width: 100%;
    flex: 1;
    min-height: 540px;
    resize: vertical;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px;
    font: 14px/1.5 "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    color: #111827;
    background: #fcfdff;
    outline: none;
}


textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.status {
    border-radius: 12px;
    padding: 12px 14px;
    margin-bottom: 12px;
    border: 1px solid var(--border);
    line-height: 1.45;
}

.status.ok {
    background: var(--ok-bg);
    border-color: var(--ok-bd);
    color: var(--ok-tx);
}

.status.warn {
    background: var(--warn-bg);
    border-color: var(--warn-bd);
    color: var(--warn-tx);
}

.status-panel {
    padding-bottom: 12px;
}

.status.error {
    background: var(--err-bg);
    border-color: var(--err-bd);
    color: var(--err-tx);
}

.meta {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 12px;
}

.metric {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px;
    background: #fcfdff;
}

.metric .label {
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 4px;
}

.metric .value {
    font-size: 1.05rem;
    font-weight: 700;
}

.tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.tab {
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: #fff;
    cursor: pointer;
    font-weight: 600;
}

.tab.active {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
}

.tabpanel {
    display: none;
    flex: 1;
    min-height: 0;
}

.tabpanel.active {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.table-wrap {
    flex: 1;
    min-height: 0;
    overflow: auto;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fff;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

th, td {
    padding: 10px 12px;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid #eef1f7;
}

th {
    position: sticky;
    top: 0;
    background: #f8fafc;
    z-index: 1;
}

td code, .legend code {
    white-space: pre-wrap;

    word-break: break-word;

    font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

    font-size: 0.88rem;
}

.pill {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 700;
    border: 1px solid transparent;
}

.pill.ok {
    background: var(--ok-bg);
    color: var(--ok-tx);
    border-color: var(--ok-bd);
}

.pill.warn {
    background: var(--warn-bg);
    color: var(--warn-tx);
    border-color: var(--warn-bd);
}

.pill.err {
    background: var(--err-bg);
    color: var(--err-tx);
    border-color: var(--err-bd);
}

.tree-wrap {
    flex: 1;
    min-height: 0;
    overflow: auto;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: linear-gradient(#fff, #fbfdff);
    padding: 14px;
}

.tree {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.tree ul {
    list-style: none;
    margin: 10px 0 0 24px;
    padding-left: 18px;
    border-left: 2px solid #e5e7eb;
}

.tree li {
    margin: 8px 0;
}

.tree details > summary {
    list-style: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 12px;
    border: 1px solid var(--node-border);
    background: var(--node);
}

.tree details > summary::-webkit-details-marker {
    display: none;
}

.tree .leaf {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    padding: 8px 10px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #fff;
}

.node-title {
    font-weight: 700;
}

.node-meta {
    color: var(--muted);
    font-size: 0.85rem;
}

.legend {
    margin-top: 10px;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

.footer {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    color: var(--muted);
    font-size: 0.85rem;
}

.w3c-badge {
    height: 31px;
    width: auto;
}

@media (max-width: 1080px) {
    .layout {
        grid-template-columns: 1fr;
    }

    textarea {
        min-height: 340px;
    }

    .meta {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 700px) {
    .meta {
        grid-template-columns: 1fr;
    }
}