:root {
    color-scheme: light;
    --bg: #f4f7f5;
    --surface: #ffffff;
    --text: #14201a;
    --muted: #64756b;
    --line: #d8e2dc;
    --brand: #147a4b;
    --brand-dark: #0f5d3a;
    --warning: #a96500;
    --danger: #b42318;
    --ok: #16704a;
    --shadow: 0 10px 28px rgba(18, 38, 30, 0.06);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    color: var(--text);
    background: var(--bg);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

.page-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 32px 0 56px;
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin: 0 0 18px;
    color: var(--muted);
    font-size: 0.88rem;
}

.breadcrumbs a {
    color: var(--brand);
    font-weight: 800;
    text-decoration: none;
}

.breadcrumbs a:hover,
.breadcrumbs a:focus {
    text-decoration: underline;
}

.hero {
    padding: 34px 0 24px;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--brand);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1,
h2 {
    letter-spacing: 0;
}

h1 {
    max-width: 820px;
    margin: 0;
    font-size: clamp(2.1rem, 5vw, 4.1rem);
    line-height: 1;
}

.hero-copy {
    max-width: 760px;
    margin: 18px 0 0;
    color: var(--muted);
    font-size: 1.08rem;
}

.tool-panel,
.card,
.summary-card,
.alert {
    background: var(--surface);
    border: 0;
    border-radius: 8px;
    box-shadow: none;
}

.tool-panel {
    padding: 22px 0;
    background: transparent;
    box-shadow: none;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

label {
    display: block;
    margin-bottom: 9px;
    font-weight: 800;
}

.input-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
}

input[type="url"] {
    width: 100%;
    min-height: 50px;
    padding: 0 14px;
    color: var(--text);
    background: #fbfdfc;
    border: 1px solid #bdcbc3;
    border-radius: 6px;
    font: inherit;
}

input[type="url"]:focus {
    outline: 3px solid rgba(20, 122, 75, 0.18);
    border-color: var(--brand);
}

button {
    min-height: 50px;
    padding: 0 20px;
    color: #ffffff;
    background: var(--brand);
    border: 1px solid var(--brand);
    border-radius: 6px;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

button:hover,
button:focus {
    background: var(--brand-dark);
    border-color: var(--brand-dark);
}

.hint {
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.alert-list {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.alert {
    padding: 14px 16px;
    color: var(--danger);
    background: #fff5f3;
    border-color: #f1b7af;
    font-weight: 700;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-top: 22px;
}

.summary-card {
    display: grid;
    gap: 2px;
    min-width: 0;
    padding: 16px 0;
    background: transparent;
    border-top: 2px solid var(--line);
    border-radius: 0;
    box-shadow: none;
}

.summary-card strong {
    min-width: 0;
    color: var(--text);
    font-size: 1.7rem;
    line-height: 1.1;
    overflow-wrap: anywhere;
}

.summary-card span {
    min-width: 0;
    color: var(--muted);
    overflow-wrap: anywhere;
}

.summary-label {
    color: var(--text) !important;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.score-good {
    border-top-color: var(--ok);
}

.score-good strong {
    color: var(--ok);
}

.score-warn {
    border-top-color: var(--warning);
}

.score-warn strong {
    color: var(--warning);
}

.score-bad {
    border-top-color: var(--danger);
}

.score-bad strong {
    color: var(--danger);
}

.results-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 370px;
    gap: 18px;
    margin-top: 18px;
    align-items: start;
}

.results-main,
.results-side {
    display: grid;
    gap: 18px;
}

.card {
    min-width: 0;
    padding: 20px 0;
    background: transparent;
    border-top: 1px solid var(--line);
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
}

.card h2 {
    margin: 0 0 14px;
    font-size: 1.18rem;
}

.signal-list {
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 0 18px;
    margin: 0;
}

.signal-list.compact {
    grid-template-columns: 120px minmax(0, 1fr);
}

.signal-list dt {
    padding: 10px 0;
    color: var(--muted);
    font-weight: 800;
    border-top: 1px solid rgba(216, 226, 220, 0.72);
}

.signal-list dd {
    min-width: 0;
    margin: 0;
    padding: 10px 0;
    border-top: 1px solid rgba(216, 226, 220, 0.72);
    overflow-wrap: anywhere;
}

.issue-list {
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.issue-list li {
    display: grid;
    gap: 4px;
    padding: 2px 0 12px 12px;
    background: transparent;
    border-left: 3px solid var(--muted);
    border-radius: 0;
}

.issue-critical {
    border-left-color: var(--danger) !important;
}

.issue-warning {
    border-left-color: var(--warning) !important;
}

.issue-notice {
    border-left-color: var(--brand) !important;
}

.issue-list span,
.empty-state {
    color: var(--muted);
}

.seo-content {
    margin-top: 34px;
    padding-top: 28px;
    border-top: 1px solid var(--line);
}

.seo-content-main {
    max-width: 820px;
}

.seo-content-main h2 {
    margin: 0 0 12px;
    font-size: clamp(1.55rem, 3vw, 2.2rem);
}

.seo-content-main p,
.seo-content article p {
    margin: 0;
    color: var(--muted);
}

.seo-content-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 22px;
}

.seo-content article {
    min-width: 0;
}

.seo-content h3 {
    margin: 0 0 9px;
    font-size: 1rem;
}

.seo-content ul {
    display: grid;
    gap: 8px;
    margin: 0;
    padding-left: 18px;
}

.seo-content a {
    color: var(--brand);
    font-weight: 800;
}

@media (max-width: 900px) {
    .summary-grid,
    .results-layout,
    .seo-content-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .page-shell {
        width: min(100% - 22px, 1180px);
        padding-top: 24px;
    }

    h1 {
        font-size: 2.25rem;
    }

    .input-row,
    .signal-list,
    .signal-list.compact {
        grid-template-columns: 1fr;
    }

    button {
        width: 100%;
    }
}