/* Tools design system — extends /css/style.css */

:root {
    --accent: #2563eb;
    --accent-contrast: #ffffff;
    --ok: #15803d;
    --warn: #b45309;
    --bad: #b91c1c;
    --surface: color-mix(in srgb, var(--text) 3%, var(--bg));
    --mono: ui-monospace, 'SF Mono', SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --accent: #6ea1f7;
        --accent-contrast: #101623;
        --ok: #4ade80;
        --warn: #fbbf24;
        --bad: #f87171;
    }
}

:root[data-theme="light"] {
    --accent: #2563eb;
    --accent-contrast: #ffffff;
    --ok: #15803d;
    --warn: #b45309;
    --bad: #b91c1c;
}

:root[data-theme="dark"] {
    --accent: #6ea1f7;
    --accent-contrast: #101623;
    --ok: #4ade80;
    --warn: #fbbf24;
    --bad: #f87171;
}

/* ---------- Page scaffolding ---------- */

.tool-page {
    padding-bottom: 2rem;
}

.tool-breadcrumb {
    margin-top: 0.5rem;
    font-size: 0.875rem;
}

.tool-breadcrumb a {
    color: var(--text-muted);
    text-decoration: none;
}

.tool-breadcrumb a:hover {
    color: var(--accent);
}

.tool-hero h1 {
    font-size: 2.25rem;
    margin: 1rem 0 0.75rem;
    letter-spacing: -0.02em;
}

.tool-lede {
    color: var(--text-muted);
    font-size: 1.0625rem;
    max-width: 60ch;
    margin-bottom: 2rem;
}

.tool-body {
    margin-top: 3rem;
}

.tool-body h2 {
    font-size: 1.375rem;
}

.tool-footnote {
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.8125rem;
    color: var(--text-muted);
}

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

/* ---------- Form ---------- */

.tool-form {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.tool-form input[type="url"],
.tool-form input[type="text"] {
    flex: 1 1 16rem;
    font: inherit;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.625rem 0.875rem;
    min-width: 0;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.tool-form input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent);
}

.tool-form input::placeholder {
    color: color-mix(in srgb, var(--text-muted) 70%, transparent);
}

.btn {
    font: inherit;
    font-weight: 600;
    color: var(--accent-contrast);
    background: var(--accent);
    border: 1px solid transparent;
    border-radius: 0.5rem;
    padding: 0.625rem 1.25rem;
    cursor: pointer;
    transition: filter 0.15s, opacity 0.15s;
}

.btn:hover {
    filter: brightness(1.08);
}

.btn:active {
    filter: brightness(0.95);
}

.btn[disabled] {
    opacity: 0.55;
    cursor: default;
}

/* ---------- Status / errors ---------- */

.tool-status {
    margin-bottom: 1.5rem;
    font-size: 0.9375rem;
}

.tool-status.is-error {
    border: 1px solid color-mix(in srgb, var(--bad) 40%, transparent);
    background: color-mix(in srgb, var(--bad) 8%, transparent);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
}

/* ---------- Result primitives ---------- */

.result-card {
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.25rem;
    margin-bottom: 1rem;
    background: var(--surface);
}

.result-card h2,
.result-card h3 {
    margin: 0 0 0.75rem;
    font-size: 1.0625rem;
}

.group-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 1.75rem 0 0.5rem;
}

.group-label:first-child {
    margin-top: 0;
}

/* Verdict banner */
.verdict {
    border-radius: 0.75rem;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

.verdict--ok {
    border-color: color-mix(in srgb, var(--ok) 35%, transparent);
    background: color-mix(in srgb, var(--ok) 8%, transparent);
}

.verdict--warn {
    border-color: color-mix(in srgb, var(--warn) 40%, transparent);
    background: color-mix(in srgb, var(--warn) 8%, transparent);
}

.verdict--bad {
    border-color: color-mix(in srgb, var(--bad) 40%, transparent);
    background: color-mix(in srgb, var(--bad) 8%, transparent);
}

.verdict-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 0.25rem;
}

.verdict-sub {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9375rem;
}

/* Pills */
.pill {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    padding: 0.3125rem 0.625rem;
    border-radius: 999px;
    white-space: nowrap;
}

.pill::before {
    content: "";
    width: 0.4375rem;
    height: 0.4375rem;
    border-radius: 50%;
    background: currentColor;
}

.pill--ok {
    color: var(--ok);
    background: color-mix(in srgb, var(--ok) 12%, transparent);
}

.pill--warn {
    color: var(--warn);
    background: color-mix(in srgb, var(--warn) 14%, transparent);
}

.pill--bad {
    color: var(--bad);
    background: color-mix(in srgb, var(--bad) 12%, transparent);
}

.pill--muted {
    color: var(--text-muted);
    background: color-mix(in srgb, var(--text-muted) 14%, transparent);
}

/* Generic row: name/detail left, pill right, optional full-width extra below */
.result-rows {
    display: flex;
    flex-direction: column;
}

.result-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
}

.result-row:last-child {
    border-bottom: none;
}

.result-row-main {
    flex: 1 1 14rem;
    min-width: 0;
}

.result-row-name {
    font-weight: 600;
    font-size: 0.9375rem;
}

.result-row-detail {
    display: block;
    color: var(--text-muted);
    font-size: 0.8125rem;
    margin-top: 0.125rem;
}

.result-row-extra {
    flex-basis: 100%;
    font-size: 0.8125rem;
}

/* Key/value line */
.kv {
    display: flex;
    gap: 0.75rem;
    font-size: 0.875rem;
    padding: 0.25rem 0;
}

.kv dt {
    flex: 0 0 9rem;
    color: var(--text-muted);
}

.kv dd {
    margin: 0;
    min-width: 0;
    overflow-wrap: anywhere;
}

/* Mono / URLs / redirect chains */
.mono {
    font-family: var(--mono);
    font-size: 0.8125rem;
    overflow-wrap: anywhere;
}

.chain {
    font-family: var(--mono);
    font-size: 0.8125rem;
    line-height: 1.9;
    overflow-wrap: anywhere;
}

.chain-arrow {
    color: var(--text-muted);
    padding: 0 0.25rem;
    user-select: none;
}

.chain-code {
    display: inline-block;
    font-weight: 700;
    font-size: 0.6875rem;
    padding: 0.0625rem 0.375rem;
    border-radius: 0.25rem;
    vertical-align: 0.0625rem;
}

.chain-code--ok {
    color: var(--ok);
    background: color-mix(in srgb, var(--ok) 12%, transparent);
}

.chain-code--redirect {
    color: var(--text-muted);
    background: color-mix(in srgb, var(--text-muted) 14%, transparent);
}

.chain-code--bad {
    color: var(--bad);
    background: color-mix(in srgb, var(--bad) 12%, transparent);
}

/* Matched-rule / code snippet */
.rule-snippet {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    background: color-mix(in srgb, var(--text) 5%, transparent);
    border-radius: 0.25rem;
    padding: 0.125rem 0.375rem;
}

/* Hints */
.hint-list {
    margin: 0;
    padding-left: 1.25rem;
    font-size: 0.875rem;
}

.hint-list li {
    margin-bottom: 0.5rem;
}

/* ---------- Loading skeleton ---------- */

.skeleton {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.skeleton-bar {
    height: 1rem;
    border-radius: 0.375rem;
    background: linear-gradient(90deg,
            color-mix(in srgb, var(--text) 6%, transparent) 25%,
            color-mix(in srgb, var(--text) 12%, transparent) 50%,
            color-mix(in srgb, var(--text) 6%, transparent) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.4s ease-in-out infinite;
}

.skeleton-bar--wide {
    height: 3.5rem;
}

@keyframes skeleton-shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .skeleton-bar {
        animation: none;
    }
}

/* ---------- Tools index ---------- */

.tool-index {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 2rem 0;
}

.tool-card {
    display: block;
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.25rem 1.5rem;
    text-decoration: none;
    background: var(--surface);
    transition: border-color 0.15s, transform 0.15s;
}

.tool-card:hover {
    border-color: var(--accent);
    transform: translateY(-1px);
    color: inherit;
}

.tool-card h2 {
    font-size: 1.1875rem;
    margin: 0 0 0.375rem;
}

.tool-card p {
    color: var(--text-muted);
    font-size: 0.9375rem;
    margin: 0 0 0.625rem;
}

.tool-card-cta {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
}

/* ---------- Small screens ---------- */

@media (max-width: 480px) {
    .tool-hero h1 {
        font-size: 1.75rem;
    }

    .kv {
        flex-direction: column;
        gap: 0.125rem;
    }

    .kv dt {
        flex-basis: auto;
    }
}

/* ---------- SERP preview (snippet-preview tool) ---------- */

.serp-preview {
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1rem;
    background: var(--bg);
    font-family: arial, sans-serif;
}

.serp-crumb {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.375rem;
}

.serp-favicon {
    width: 1.625rem;
    height: 1.625rem;
    border-radius: 50%;
    background: color-mix(in srgb, var(--text-muted) 15%, transparent);
    display: inline-grid;
    place-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    flex: none;
}

.serp-site {
    font-size: 0.875rem;
    line-height: 1.3;
    color: var(--text);
    overflow: hidden;
}

.serp-url {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.serp-title {
    display: block;
    font-size: 1.25rem;
    line-height: 1.3;
    color: #1a0dab;
    margin: 0 0 0.25rem;
    max-width: 600px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.serp-desc {
    font-size: 0.875rem;
    line-height: 1.58;
    color: #4d5156;
    margin: 0;
    max-width: 600px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .serp-title {
        color: #99c3ff;
    }

    :root:not([data-theme="light"]) .serp-desc {
        color: #bdc1c6;
    }
}

:root[data-theme="dark"] .serp-title {
    color: #99c3ff;
}

:root[data-theme="dark"] .serp-desc {
    color: #bdc1c6;
}

/* ---------- Stat grid (redirect tracer and friends) ---------- */

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.stat {
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 0.875rem 1rem;
    background: var(--surface);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.stat-value--ok { color: var(--ok); }
.stat-value--warn { color: var(--warn); }
.stat-value--bad { color: var(--bad); }

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.125rem;
}