:root {
    color-scheme: light;
    --ipseek-brand-primary: #f97316;
    --ipseek-brand-primary-hover: #ea580c;
    --ipseek-brand-primary-soft: #fff7ed;
    --ipseek-brand-secondary: #4f46e5;
    --ipseek-brand-secondary-soft: #eef2ff;
    --ipseek-bg: #f8fafc;
    --ipseek-surface: #ffffff;
    --ipseek-surface-elevated: #ffffff;
    --ipseek-surface-subtle: #f1f5f9;
    --ipseek-border: #e2e8f0;
    --ipseek-border-strong: #cbd5e1;
    --ipseek-text: #0f172a;
    --ipseek-text-muted: #64748b;
    --ipseek-text-subtle: #94a3b8;
    --ipseek-text-on-brand: #ffffff;
    --ipseek-success: #15803d;
    --ipseek-success-soft: #f0fdf4;
    --ipseek-info: #0369a1;
    --ipseek-info-soft: #f0f9ff;
    --ipseek-warning: #a16207;
    --ipseek-warning-soft: #fefce8;
    --ipseek-danger: #b91c1c;
    --ipseek-danger-soft: #fef2f2;
    --ipseek-focus-ring: rgba(79, 70, 229, .30);
    --ipseek-shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
    --ipseek-shadow-md: 0 10px 30px rgba(15, 23, 42, .10);
    --ipseek-code-bg: #111827;
    --ipseek-code-text: #f8fafc;
    --bs-body-bg: var(--ipseek-bg);
    --bs-body-color: var(--ipseek-text);
    --bs-border-color: var(--ipseek-border);
}

html[data-theme="dark"] {
    color-scheme: dark;
    --ipseek-brand-primary: #fb923c;
    --ipseek-brand-primary-hover: #fdba74;
    --ipseek-brand-primary-soft: #431407;
    --ipseek-brand-secondary: #818cf8;
    --ipseek-brand-secondary-soft: #1e1b4b;
    --ipseek-bg: #0b1120;
    --ipseek-surface: #111827;
    --ipseek-surface-elevated: #182235;
    --ipseek-surface-subtle: #1e293b;
    --ipseek-border: #334155;
    --ipseek-border-strong: #475569;
    --ipseek-text: #f8fafc;
    --ipseek-text-muted: #cbd5e1;
    --ipseek-text-subtle: #94a3b8;
    --ipseek-text-on-brand: #111827;
    --ipseek-success: #4ade80;
    --ipseek-success-soft: #052e16;
    --ipseek-info: #38bdf8;
    --ipseek-info-soft: #082f49;
    --ipseek-warning: #facc15;
    --ipseek-warning-soft: #422006;
    --ipseek-danger: #f87171;
    --ipseek-danger-soft: #450a0a;
    --ipseek-focus-ring: rgba(129, 140, 248, .38);
    --ipseek-shadow-sm: 0 1px 2px rgba(0, 0, 0, .24);
    --ipseek-shadow-md: 0 18px 38px rgba(0, 0, 0, .32);
    --ipseek-code-bg: #020617;
    --ipseek-code-text: #e2e8f0;
    --bs-body-bg: var(--ipseek-bg);
    --bs-body-color: var(--ipseek-text);
    --bs-border-color: var(--ipseek-border);
}

html, body { background: var(--ipseek-bg); color: var(--ipseek-text); }
body { transition: background-color .16s ease, color .16s ease; }
a { color: var(--ipseek-brand-secondary); }
a:hover { color: var(--ipseek-brand-primary); }
:focus-visible { outline: 3px solid var(--ipseek-focus-ring); outline-offset: 2px; }

.ipseek-surface {
    background: var(--ipseek-surface);
    color: var(--ipseek-text);
    border: 1px solid var(--ipseek-border);
    box-shadow: var(--ipseek-shadow-sm);
}
.ipseek-muted { color: var(--ipseek-text-muted); }

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--ipseek-text);
}

.ipseek-code {
    background: var(--ipseek-code-bg);
    color: var(--ipseek-code-text);
}

.ipseek-code code {
    display: block;
    padding: 0;
    border: 0;
    background: transparent;
    color: inherit;
    font-family: var(--ipseek-font-mono);
    font-size: .95rem;
    line-height: 1.6;
    white-space: pre;
}

.ipseek-theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    min-height: 2.5rem;
    padding: .55rem .8rem;
    border: 1px solid var(--ipseek-border);
    border-radius: .75rem;
    background: var(--ipseek-surface);
    color: var(--ipseek-text);
    box-shadow: var(--ipseek-shadow-sm);
    cursor: pointer;
    font: inherit;
}
.ipseek-theme-toggle:hover {
    border-color: var(--ipseek-border-strong);
    background: var(--ipseek-surface-subtle);
}
.ipseek-theme-toggle__icon { width: 1.1rem; text-align: center; }

.ipseek-theme-uat { max-width: 1080px; margin: 0 auto; padding: 3rem 1.25rem 5rem; }
.ipseek-theme-uat__header {
    display: flex; align-items: center; justify-content: space-between;
    gap: 1rem; margin-bottom: 2rem;
}
.ipseek-theme-uat__grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1rem;
}
.ipseek-theme-uat__card { padding: 1.25rem; border-radius: 1rem; }
.ipseek-theme-uat__swatch {
    min-height: 5rem; border-radius: .75rem; padding: .85rem;
    display: flex; align-items: flex-end; font-weight: 600;
}
.ipseek-theme-uat__swatch--brand { background: var(--ipseek-brand-primary); color: var(--ipseek-text-on-brand); }
.ipseek-theme-uat__swatch--secondary { background: var(--ipseek-brand-secondary); color: #fff; }
.ipseek-theme-uat__swatch--surface {
    background: var(--ipseek-surface-subtle); color: var(--ipseek-text);
    border: 1px solid var(--ipseek-border);
}
.ipseek-theme-uat__status {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: .75rem;
}
.ipseek-theme-uat__status > div { padding: .85rem; border-radius: .75rem; border: 1px solid currentColor; }
.ipseek-theme-uat__success { color: var(--ipseek-success); background: var(--ipseek-success-soft); }
.ipseek-theme-uat__info { color: var(--ipseek-info); background: var(--ipseek-info-soft); }
.ipseek-theme-uat__warning { color: var(--ipseek-warning); background: var(--ipseek-warning-soft); }
.ipseek-theme-uat__danger { color: var(--ipseek-danger); background: var(--ipseek-danger-soft); }

@media (prefers-reduced-motion: reduce) { body { transition: none; } }

/* === IP Seek authoritative type scale ===
 * Neutralizes the legacy Milligram html { font-size: 62.5%; } convention.
 */
:root {
    --ipseek-font-size-base: 1rem;
    --ipseek-line-height-base: 1.55;
}

html {
    font-size: 100%;
}

body {
    font-size: var(--ipseek-font-size-base);
    line-height: var(--ipseek-line-height-base);
}

h1 {
    font-size: clamp(2rem, 3vw, 2.65rem);
    line-height: 1.12;
}

h2 {
    font-size: clamp(1.55rem, 2.2vw, 2rem);
    line-height: 1.2;
}

h3 {
    font-size: 1.3rem;
    line-height: 1.3;
}

h4 {
    font-size: 1.12rem;
    line-height: 1.35;
}

h5,
h6 {
    font-size: 1rem;
    line-height: 1.4;
}

button,
input,
select,
textarea {
    font-size: 1rem;
}