:root {
    --bg: #f5f6f7;
    --surface: #ffffff;
    --surface-raised: #ffffff;
    --surface-muted: #eef0f2;
    --surface-hover: #e9ecef;
    --border: #d8dde2;
    --border-strong: #b8c0c8;
    --text: #16191d;
    --text-secondary: #4e5863;
    --text-muted: #78838f;
    --accent: #087f5b;
    --accent-hover: #066b4c;
    --accent-soft: #e1f5ed;
    --focus: #0b8f66;
    --success: #087f5b;
    --success-soft: #e1f5ed;
    --redirect: #0969da;
    --redirect-soft: #e6f0ff;
    --warning: #9a6700;
    --warning-soft: #fff5d6;
    --danger: #cf222e;
    --danger-soft: #ffebe9;
    --code-bg: #f1f3f5;
    --shadow: 0 8px 30px rgba(22, 25, 29, 0.08);
    --radius: 6px;
    --font-sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

[data-theme="dark"] {
    --bg: #0f1113;
    --surface: #15181b;
    --surface-raised: #1a1e22;
    --surface-muted: #20252a;
    --surface-hover: #252b31;
    --border: #2c333a;
    --border-strong: #46515c;
    --text: #f0f3f5;
    --text-secondary: #b1bac4;
    --text-muted: #7e8995;
    --accent: #3ecf8e;
    --accent-hover: #68dda8;
    --accent-soft: #123a2c;
    --focus: #56d99c;
    --success: #3ecf8e;
    --success-soft: #123a2c;
    --redirect: #69a7ff;
    --redirect-soft: #162d4f;
    --warning: #e3b341;
    --warning-soft: #3a2d0d;
    --danger: #ff7b72;
    --danger-soft: #4a1d20;
    --code-bg: #101214;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }

html { color-scheme: light; }
[data-theme="dark"] { color-scheme: dark; }

body {
    margin: 0;
    min-width: 320px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
    letter-spacing: 0;
}

main { flex: 1 0 auto; }

button, input, select { font: inherit; letter-spacing: 0; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; }
[hidden] { display: none !important; }

:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
}

.skip-link {
    position: fixed;
    top: 8px;
    left: 8px;
    z-index: 200;
    transform: translateY(-150%);
    padding: 8px 12px;
    border-radius: var(--radius);
    background: var(--text);
    color: var(--bg);
    text-decoration: none;
}
.skip-link:focus { transform: translateY(0); }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.page-width {
    width: min(1180px, calc(100% - 40px));
    margin-inline: auto;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
}

.topbar-inner {
    width: min(1240px, calc(100% - 32px));
    height: 56px;
    margin-inline: auto;
    display: flex;
    align-items: center;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    min-width: 0;
    gap: 9px;
    text-decoration: none;
    white-space: nowrap;
}

.brand-mark {
    width: 30px;
    height: 30px;
    display: grid;
    place-items: center;
    color: #08130f;
    background: var(--accent);
    border-radius: 5px;
}

.brand-mark svg { width: 18px; height: 18px; stroke-width: 2.2; }
.brand-name { font-weight: 750; font-size: 15px; }
.brand-product { color: var(--text-secondary); font-size: 13px; }

.preview-tag {
    padding: 2px 6px;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 10px;
}

.topnav {
    margin-left: auto;
    height: 100%;
    display: flex;
    align-items: stretch;
    gap: 4px;
}

.topnav a {
    position: relative;
    display: flex;
    align-items: center;
    padding: 0 12px;
    color: var(--text-secondary);
    font-size: 13px;
    text-decoration: none;
}

.topnav a:hover { color: var(--text); }
.topnav a.active { color: var(--text); font-weight: 600; }
.topnav a.active::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: -1px;
    height: 2px;
    background: var(--accent);
}

.topbar-actions, .result-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

.icon-button, .field-action {
    width: 34px;
    height: 34px;
    display: inline-grid;
    place-items: center;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    cursor: pointer;
}

.icon-button:hover, .field-action:hover { background: var(--surface-hover); border-color: var(--border-strong); }
.icon-button:disabled { opacity: .4; cursor: not-allowed; }
.icon-button svg, .field-action svg { width: 16px; height: 16px; }
.icon-button.compact { width: 30px; height: 30px; }

.tool-intro {
    min-height: 146px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding-block: 34px 30px;
}

.eyebrow {
    margin: 0 0 5px;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
}

h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 5px; font-size: 27px; line-height: 1.2; }
h2 { margin-bottom: 0; font-size: 20px; line-height: 1.25; }
h3 { margin-bottom: 0; font-size: 14px; line-height: 1.3; }
.intro-copy { margin-bottom: 0; color: var(--text-secondary); font-size: 14px; }

.service-state {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 12px;
}

.state-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0 3px var(--success-soft);
}

.service-state.checking .state-dot { background: var(--warning); box-shadow: 0 0 0 3px var(--warning-soft); }
.service-state.error .state-dot { background: var(--danger); box-shadow: 0 0 0 3px var(--danger-soft); }

.request-band {
    background: var(--surface);
    border-block: 1px solid var(--border);
    padding-block: 20px 15px;
}

#checkForm {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
}

.url-field {
    height: 48px;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 7px 0 14px;
    background: var(--bg);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, .03);
}

.url-field:focus-within {
    border-color: var(--focus);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 18%, transparent);
}

.url-field > svg { width: 18px; height: 18px; color: var(--text-muted); flex: 0 0 auto; }
.protocol-label {
    padding-right: 10px;
    border-right: 1px solid var(--border);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 11px;
}

.url-field input {
    height: 100%;
    min-width: 0;
    flex: 1;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 14px;
}

.url-field input::placeholder { color: var(--text-muted); font-family: var(--font-sans); }
.field-action { width: 30px; height: 30px; border: 0; background: transparent; }

.run-button {
    height: 48px;
    min-width: 132px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0 18px;
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    background: var(--accent);
    color: #07130f;
    font-weight: 700;
    cursor: pointer;
}

[data-theme="light"] .run-button { color: #fff; }
.run-button:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.run-button:disabled { opacity: .65; cursor: wait; }
.run-button.cancel { border-color: var(--danger); background: var(--danger); color: #fff; }
.run-button.cancel:hover { border-color: var(--danger); background: color-mix(in srgb, var(--danger) 86%, #000); }
.run-button svg { width: 16px; height: 16px; fill: currentColor; }
.run-button.loading svg { animation: spin 1s linear infinite; fill: none; }
@keyframes spin { to { transform: rotate(360deg); } }

.request-meta {
    min-height: 32px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    padding-top: 9px;
}

.quick-targets { display: flex; align-items: center; gap: 12px; color: var(--text-muted); font-size: 12px; }
.quick-targets button, .advanced-toggle, .text-button {
    min-height: 32px;
    padding: 4px;
    border: 0;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
}
.quick-targets button:hover, .advanced-toggle:hover, .text-button:hover { color: var(--text); }
.quick-targets button:disabled, .advanced-toggle:disabled { opacity: .5; cursor: not-allowed; }

.advanced-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
}
.advanced-toggle svg { width: 14px; height: 14px; }
.advanced-toggle .chevron { transition: transform .18s ease; }
.advanced-toggle[aria-expanded="true"] .chevron { transform: rotate(180deg); }

.advanced-options {
    margin-top: 12px;
    padding-top: 15px;
    border-top: 1px solid var(--border);
    display: grid;
    grid-template-columns: minmax(220px, 280px) minmax(260px, 1fr);
    align-items: end;
    gap: 14px;
}

.option-group { display: grid; gap: 6px; }
.option-group label { color: var(--text-secondary); font-size: 12px; font-weight: 600; }
.option-group select, .option-group input {
    width: 100%;
    height: 38px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg);
    color: var(--text);
    padding: 0 10px;
}
.option-group input { font-family: var(--font-mono); font-size: 12px; }
.option-note {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 1px 0 0;
    color: var(--text-muted);
    font-size: 11px;
}
.option-note svg { width: 13px; height: 13px; }

.status-region { padding-top: 18px; }
.status-message {
    min-height: 42px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 13px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-secondary);
}
.status-message.error { border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); background: var(--danger-soft); color: var(--danger); }
.status-message svg { width: 17px; height: 17px; flex: 0 0 auto; }

.results { padding-top: 18px; }
.results.checking > *:not(.results-heading) { opacity: .58; }
.results.checking .result-workspace, .results.checking .result-analysis { pointer-events: none; }
.results-heading {
    min-height: 54px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.result-verdict {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-top: 10px;
    padding: 15px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}
.result-verdict.success { border-color: color-mix(in srgb, var(--success) 42%, var(--border)); background: var(--success-soft); }
.result-verdict.warning { border-color: color-mix(in srgb, var(--warning) 42%, var(--border)); background: var(--warning-soft); }
.result-verdict.danger { border-color: color-mix(in srgb, var(--danger) 42%, var(--border)); background: var(--danger-soft); }
.verdict-copy { min-width: 0; display: flex; align-items: flex-start; gap: 11px; }
.verdict-copy strong { display: block; margin-bottom: 2px; font-size: 14px; }
.verdict-copy p { margin: 0; color: var(--text-secondary); font-size: 12px; }
.verdict-icon { width: 26px; height: 26px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 50%; background: var(--surface); }
.verdict-icon svg { width: 15px; height: 15px; }
.result-verdict.success .verdict-icon { color: var(--success); }
.result-verdict.warning .verdict-icon { color: var(--warning); }
.result-verdict.danger .verdict-icon { color: var(--danger); }
.verdict-facts { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px; }
.verdict-facts span { padding: 4px 7px; border: 1px solid color-mix(in srgb, currentColor 16%, transparent); border-radius: 4px; color: var(--text-secondary); background: color-mix(in srgb, var(--surface) 72%, transparent); font-size: 10px; white-space: nowrap; }

.action-button {
    height: 34px;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 0 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 12px;
}
.action-button:hover { border-color: var(--border-strong); color: var(--text); background: var(--surface-hover); }
.action-button svg { width: 14px; height: 14px; }

.summary-strip {
    display: grid;
    grid-template-columns: repeat(3, 132px) minmax(0, 1fr);
    margin-top: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius) var(--radius) 0 0;
    background: var(--surface);
    overflow: hidden;
}

.summary-item {
    min-width: 0;
    padding: 13px 15px;
    border-right: 1px solid var(--border);
}
.summary-item:last-child { border-right: 0; }
.summary-label { display: block; margin-bottom: 3px; color: var(--text-muted); font-size: 10px; font-weight: 700; }
.summary-value { display: block; color: var(--text); font-family: var(--font-mono); font-size: 16px; font-weight: 700; }
.summary-value.status-success { color: var(--success); }
.summary-value.status-redirect { color: var(--redirect); }
.summary-value.status-danger { color: var(--danger); }
.summary-url .summary-value { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 12px; font-weight: 500; }

.result-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(330px, .85fr);
    min-height: 440px;
    border: 1px solid var(--border);
    border-top: 0;
    border-radius: 0 0 var(--radius) var(--radius);
    background: var(--surface);
    overflow: hidden;
}

.chain-panel { min-width: 0; border-right: 1px solid var(--border); }
.panel-heading {
    min-height: 57px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
}
.panel-heading > div { min-width: 0; }
.panel-heading h3 { display: inline; }
.panel-heading span { margin-left: 7px; color: var(--text-muted); font-size: 11px; }
.panel-hint { white-space: nowrap; }

.chain-column-head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 70px;
    padding: 7px 18px 7px 64px;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 700;
}
.chain-column-head span:last-child { text-align: right; }
.chain-list { padding: 7px 0; }

.chain-node {
    position: relative;
    width: 100%;
    min-height: 67px;
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr) 64px;
    align-items: center;
    gap: 12px;
    padding: 8px 18px;
    border: 0;
    background: transparent;
    text-align: left;
    cursor: pointer;
}
.chain-node:hover { background: var(--surface-muted); }
.chain-node.selected { background: var(--accent-soft); }
.chain-node.selected::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 3px;
    background: var(--accent);
}
.chain-node:not(:last-child)::after {
    content: "";
    position: absolute;
    left: 34px;
    top: 50px;
    width: 1px;
    height: 34px;
    background: var(--border-strong);
}

.node-index {
    width: 28px;
    height: 28px;
    display: grid;
    place-items: center;
    z-index: 1;
    border: 1px solid var(--border-strong);
    border-radius: 50%;
    background: var(--surface);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
}
.selected .node-index { border-color: var(--accent); color: var(--accent); }

.node-main { min-width: 0; }
.node-title { display: flex; align-items: center; gap: 8px; min-width: 0; }
.status-badge {
    flex: 0 0 auto;
    min-width: 38px;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 800;
    text-align: center;
}
.status-badge.s2xx { color: var(--success); background: var(--success-soft); }
.status-badge.s3xx { color: var(--redirect); background: var(--redirect-soft); }
.status-badge.s4xx, .status-badge.s5xx, .status-badge.error { color: var(--danger); background: var(--danger-soft); }
.node-host { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 650; }
.node-path { margin-top: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-muted); font-family: var(--font-mono); font-size: 11px; }
.node-duration { color: var(--text-secondary); font-family: var(--font-mono); font-size: 11px; text-align: right; }
.node-side { display: grid; justify-items: end; gap: 3px; }
.node-kind { color: var(--text-muted); font-size: 9px; }

.inspector-panel { min-width: 0; background: var(--surface-raised); }
.inspector-heading > div { overflow: hidden; }
.inspector-heading h3, .inspector-heading span { display: block; margin-left: 0; }
.inspector-heading span { margin-top: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: var(--font-mono); }

.tabs {
    min-height: 38px;
    display: flex;
    align-items: end;
    gap: 16px;
    padding: 0 16px;
    border-bottom: 1px solid var(--border);
}
.tab {
    position: relative;
    min-width: 44px;
    height: 40px;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 11px;
    font-weight: 650;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); }
.tab.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--accent); }

.inspector-body { min-height: 340px; padding: 15px 16px 22px; }
.empty-inspector { min-height: 300px; display: grid; place-content: center; justify-items: center; gap: 8px; color: var(--text-muted); }
.empty-inspector svg { width: 20px; height: 20px; }
.empty-inspector p { margin: 0; font-size: 12px; }

.detail-list { margin: 0; }
.detail-row {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 12px;
    padding: 9px 0;
    border-bottom: 1px solid var(--border);
}
.detail-row:last-child { border-bottom: 0; }
.detail-row dt { color: var(--text-muted); font-size: 11px; }
.detail-row dd { min-width: 0; margin: 0; overflow-wrap: anywhere; font-family: var(--font-mono); font-size: 11px; }
.detail-row dd a { color: var(--redirect); text-underline-offset: 2px; }

.header-list { margin: 0; }
.header-row { padding: 8px 0; border-bottom: 1px solid var(--border); }
.header-row:last-child { border-bottom: 0; }
.header-name { display: block; margin-bottom: 3px; color: var(--redirect); font-family: var(--font-mono); font-size: 10px; font-weight: 700; }
.header-value { display: block; overflow-wrap: anywhere; color: var(--text-secondary); font-family: var(--font-mono); font-size: 11px; }
.raw-empty { color: var(--text-muted); font-size: 12px; }

.result-analysis { margin-top: 22px; border-top: 1px solid var(--border); }
.analysis-heading { min-height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.analysis-heading .eyebrow { margin-bottom: 3px; }
.analysis-heading > span { color: var(--text-muted); font-family: var(--font-mono); font-size: 10px; text-align: right; }
.finding-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--border); }
.finding { min-width: 0; display: grid; grid-template-columns: 52px minmax(0, 1fr); gap: 13px; padding: 17px 18px 17px 0; border-bottom: 1px solid var(--border); }
.finding:nth-child(even) { padding-left: 18px; border-left: 1px solid var(--border); }
.finding-label { align-self: start; width: fit-content; min-width: 42px; padding: 3px 6px; border-radius: 4px; font-family: var(--font-mono); font-size: 10px; font-weight: 700; text-align: center; }
.finding strong { display: block; margin-bottom: 5px; font-size: 13px; }
.finding p { margin: 0; color: var(--text-secondary); font-size: 12px; line-height: 1.65; }
.finding.success .finding-label { color: var(--success); background: var(--success-soft); }
.finding.info .finding-label { color: var(--redirect); background: var(--redirect-soft); }
.finding.warning .finding-label { color: var(--warning); background: var(--warning-soft); }
.finding.danger .finding-label { color: var(--danger); background: var(--danger-soft); }

.recent { padding-block: 34px 10px; }
.section-heading-inline { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 10px; }
.section-heading-inline h2 { font-size: 15px; }
.section-heading-inline p { margin: 3px 0 0; color: var(--text-muted); font-size: 11px; }
.text-button { font-size: 12px; }
.text-button.danger:hover { color: var(--danger); }
.recent-list { border-top: 1px solid var(--border); }
.recent-item {
    width: 100%;
    min-height: 47px;
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px;
    padding: 7px 5px;
    border: 0;
    border-bottom: 1px solid var(--border);
    background: transparent;
    text-align: left;
    cursor: pointer;
}
.recent-item:hover { background: var(--surface-muted); }
.recent-url { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: var(--font-mono); font-size: 12px; }
.recent-meta { color: var(--text-muted); font-size: 11px; white-space: nowrap; }

.footer { margin-top: 52px; border-top: 1px solid var(--border); }
.footer-inner { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--text-muted); font-size: 11px; }
.footer a:hover { color: var(--text); }

.knowledge { padding-block: 72px 36px; }
.knowledge-heading { max-width: 680px; margin-bottom: 30px; }
.knowledge-heading h2 { margin-bottom: 9px; font-size: 22px; }
.knowledge-heading > p:last-child { margin-bottom: 0; color: var(--text-secondary); }
.compact-heading { margin-bottom: 22px; }

.signal-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-block: 1px solid var(--border);
}
.signal-item { min-width: 0; padding: 24px 22px 24px 0; }
.signal-item + .signal-item { padding-left: 22px; border-left: 1px solid var(--border); }
.signal-item h3 { margin: 12px 0 7px; }
.signal-item p { margin: 0; color: var(--text-secondary); font-size: 12px; line-height: 1.65; }
.signal-code { display: inline-block; font-family: var(--font-mono); font-size: 12px; font-weight: 800; }
.signal-code.success { color: var(--success); }
.signal-code.redirect { color: var(--redirect); }
.signal-code.warning { color: var(--warning); }
.signal-code.danger { color: var(--danger); }

.review-checklist { max-width: 820px; padding-top: 40px; }
.review-checklist h3 { margin-bottom: 14px; font-size: 16px; }
.review-checklist ul { margin: 0; padding: 0; list-style: none; }
.review-checklist li { display: grid; grid-template-columns: 18px 1fr; gap: 9px; padding: 8px 0; color: var(--text-secondary); }
.review-checklist li svg { width: 15px; height: 15px; margin-top: 3px; color: var(--accent); }

.guide-band { margin-top: 36px; padding-block: 54px; border-block: 1px solid var(--border); background: var(--surface); }
.guide-list { display: grid; grid-template-columns: repeat(2, 1fr); column-gap: 48px; }
.guide-list a {
    min-height: 52px;
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr) 18px;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
}
.guide-list a:hover strong { color: var(--accent); }
.guide-list span { color: var(--text-muted); font-family: var(--font-mono); font-size: 10px; }
.guide-list strong { font-size: 13px; font-weight: 600; }
.guide-list svg { width: 15px; height: 15px; color: var(--text-muted); }

.faq-section { padding-block: 64px 20px; }
.faq-rows { max-width: 860px; border-top: 1px solid var(--border); }
.faq-rows details { border-bottom: 1px solid var(--border); }
.faq-rows summary { min-height: 52px; padding: 15px 4px; cursor: pointer; font-weight: 600; list-style: none; }
.faq-rows summary::-webkit-details-marker { display: none; }
.faq-rows summary::after { content: "+"; float: right; color: var(--text-muted); font-family: var(--font-mono); }
.faq-rows details[open] summary::after { content: "−"; }
.faq-rows details p { max-width: 760px; margin: -2px 4px 18px; color: var(--text-secondary); font-size: 13px; line-height: 1.75; }

/* Documentation */
.doc-shell { padding-block: 40px 80px; }
.doc-breadcrumb { margin-bottom: 24px; color: var(--text-muted); font-size: 11px; }
.doc-breadcrumb a { color: var(--text-secondary); text-decoration: none; }
.doc-breadcrumb a:hover { color: var(--accent); }
.doc-layout { display: grid; grid-template-columns: 220px minmax(0, 760px); gap: 56px; align-items: start; }
.doc-sidebar { position: sticky; top: 80px; }
.doc-sidebar-title { display: block; margin-bottom: 9px; color: var(--text-muted); font-family: var(--font-mono); font-size: 10px; font-weight: 700; }
.doc-sidebar nav { display: grid; }
.doc-sidebar a { padding: 7px 9px; border-left: 2px solid var(--border); color: var(--text-secondary); font-size: 12px; text-decoration: none; }
.doc-sidebar a:hover { color: var(--text); border-left-color: var(--border-strong); }
.doc-sidebar a.active { color: var(--accent); border-left-color: var(--accent); background: var(--accent-soft); font-weight: 650; }

.doc-article { min-width: 0; }
.doc-header { margin-bottom: 36px; padding-bottom: 28px; border-bottom: 1px solid var(--border); }
.doc-header h1 { max-width: 720px; margin-bottom: 12px; font-size: 34px; }
.doc-lead { max-width: 680px; margin-bottom: 16px; color: var(--text-secondary); font-size: 16px; line-height: 1.7; }
.doc-meta { color: var(--text-muted); font-size: 11px; }
.doc-article h2 { margin: 48px 0 17px; padding-top: 4px; font-size: 23px; }
.doc-article h3 { margin: 30px 0 12px; font-size: 17px; }
.doc-article p { margin-bottom: 17px; color: var(--text-secondary); font-size: 14px; line-height: 1.85; }
.doc-article ul, .doc-article ol { margin: 0 0 20px; padding-left: 22px; color: var(--text-secondary); }
.doc-article li { margin-bottom: 9px; line-height: 1.75; }
.doc-article strong { color: var(--text); }
.doc-article a { color: var(--redirect); text-underline-offset: 3px; }
.doc-article code { padding: 2px 5px; border: 1px solid var(--border); border-radius: 3px; background: var(--code-bg); font-family: var(--font-mono); font-size: 12px; }
.doc-article pre { margin: 20px 0; padding: 16px 18px; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--code-bg); }
.doc-article pre code { padding: 0; border: 0; background: transparent; color: var(--text-secondary); line-height: 1.7; }
.doc-note { margin: 24px 0; padding: 14px 17px; border-left: 3px solid var(--accent); background: var(--accent-soft); }
.doc-note.warning { border-left-color: var(--warning); background: var(--warning-soft); }
.doc-note p { margin: 0; color: var(--text); font-size: 13px; }
.comparison-table { width: 100%; margin: 20px 0 28px; border-collapse: collapse; font-size: 12px; }
.comparison-table th, .comparison-table td { padding: 11px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.comparison-table th { color: var(--text-muted); font-size: 10px; }
.comparison-table td { color: var(--text-secondary); }
.comparison-table td:first-child { color: var(--text); font-family: var(--font-mono); font-weight: 700; }
.doc-next { margin-top: 58px; padding-top: 22px; border-top: 1px solid var(--border); }
.doc-next a { display: flex; align-items: center; justify-content: space-between; color: var(--text); text-decoration: none; }
.doc-next a:hover { color: var(--accent); }
.doc-next span { color: var(--text-muted); font-size: 11px; }
.docs-index-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 28px; border-top: 1px solid var(--border); }
.docs-index-grid a { display: block; min-height: 124px; padding: 20px 4px; border-bottom: 1px solid var(--border); text-decoration: none; }
.docs-index-grid a:hover h2 { color: var(--accent); }
.docs-index-grid h2 { margin: 0 0 7px; padding: 0; font-size: 16px; }
.docs-index-grid p { margin: 0; font-size: 12px; line-height: 1.65; }

@supports (content-visibility: auto) {
    .knowledge, .guide-band, .faq-section { content-visibility: auto; contain-intrinsic-size: auto 700px; }
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 24px;
    z-index: 100;
    transform: translateX(-50%);
    max-width: calc(100% - 32px);
    padding: 9px 13px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    background: var(--surface-raised);
    box-shadow: var(--shadow);
    color: var(--text);
    font-size: 12px;
}

@media (max-width: 900px) {
    .result-workspace { grid-template-columns: 1fr; }
    .chain-panel { border-right: 0; border-bottom: 1px solid var(--border); }
    .inspector-body { min-height: 240px; }
    .empty-inspector { min-height: 200px; }
    .summary-strip { grid-template-columns: repeat(3, 1fr); }
    .summary-url { grid-column: 1 / -1; border-top: 1px solid var(--border); }
    .summary-item:nth-child(3) { border-right: 0; }
    .signal-grid { grid-template-columns: repeat(2, 1fr); }
    .signal-item:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid var(--border); }
    .signal-item:nth-child(4) { border-top: 1px solid var(--border); }
    .doc-layout { grid-template-columns: 180px minmax(0, 1fr); gap: 34px; }
}

@media (max-width: 700px) {
    .page-width { width: min(100% - 28px, 1180px); }
    .topbar-inner { width: calc(100% - 24px); height: auto; min-height: 56px; flex-wrap: wrap; gap: 0 12px; }
    .brand-product, .preview-tag { display: none; }
    .brand { min-height: 44px; }
    .topbar-actions { margin-left: auto; }
    .topnav { order: 3; width: 100%; height: 44px; margin-left: 0; border-top: 1px solid var(--border); }
    .topnav a { flex: 1; justify-content: center; min-height: 44px; padding: 0 8px; }
    .topnav a.active::after { left: 8px; right: 8px; }
    .tool-intro { min-height: 126px; padding-block: 27px 24px; }
    .tool-intro h1 { font-size: 23px; }
    .service-state { display: none; }
    #checkForm { grid-template-columns: 1fr; }
    .run-button { width: 100%; }
    .request-meta { align-items: center; }
    .quick-targets > span { display: none; }
    .quick-targets { gap: 10px; }
    .advanced-options { grid-template-columns: 1fr; }
    .option-note { grid-column: 1; align-items: flex-start; }
    .results-heading { align-items: flex-end; }
    .result-verdict { align-items: flex-start; flex-direction: column; gap: 11px; }
    .verdict-facts { justify-content: flex-start; }
    .analysis-heading { align-items: flex-start; flex-direction: column; justify-content: center; gap: 3px; padding-block: 10px; }
    .analysis-heading > span { text-align: left; }
    .finding-list { grid-template-columns: 1fr; }
    .finding, .finding:nth-child(even) { padding: 15px 0; border-left: 0; }
    .action-button { width: 34px; padding: 0; justify-content: center; }
    .result-actions .action-button, .result-actions .icon-button { width: 40px; height: 40px; }
    .action-button span { display: none; }
    .summary-strip { grid-template-columns: repeat(3, 1fr); }
    .summary-item { padding: 11px 10px; }
    .summary-value { font-size: 14px; }
    .panel-hint, .chain-column-head { display: none; }
    .chain-list { padding-top: 4px; }
    .chain-node { grid-template-columns: 31px minmax(0, 1fr) 52px; gap: 8px; padding-inline: 12px; }
    .chain-node:not(:last-child)::after { left: 26px; }
    .node-index { width: 26px; height: 26px; }
    .footer-inner { min-height: 82px; flex-direction: column; align-items: flex-start; justify-content: center; gap: 4px; }
    .knowledge { padding-block: 54px 24px; }
    .signal-grid, .guide-list, .docs-index-grid { grid-template-columns: 1fr; }
    .signal-item, .signal-item + .signal-item { padding: 20px 0; border-left: 0; border-top: 1px solid var(--border); }
    .signal-item:first-child { border-top: 0; }
    .guide-list { column-gap: 0; }
    .doc-shell { padding-block: 24px 60px; }
    .doc-layout { grid-template-columns: 1fr; gap: 30px; }
    .doc-sidebar { position: static; overflow: visible; }
    .doc-sidebar nav { display: grid; grid-template-columns: repeat(3, 1fr); width: 100%; }
    .doc-sidebar a { display: grid; place-items: center; min-height: 42px; padding: 6px; border-left: 0; border-bottom: 2px solid var(--border); text-align: center; white-space: normal; }
    .doc-sidebar nav a:nth-child(7):last-child { grid-column: 2; }
    .doc-sidebar a.active { border-bottom-color: var(--accent); }
    .doc-header h1 { font-size: 28px; }
    .doc-lead { font-size: 15px; }
    .comparison-table { display: block; overflow-x: auto; white-space: nowrap; }
}

@media (max-width: 420px) {
    .protocol-label { display: none; }
    .quick-targets button:last-child { display: none; }
    .summary-label { font-size: 9px; }
    .summary-item { padding-inline: 8px; }
    .verdict-facts span { white-space: normal; }
    .detail-row { grid-template-columns: 76px minmax(0, 1fr); gap: 8px; }
    .recent-item { grid-template-columns: 44px minmax(0, 1fr); }
    .recent-meta { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}