:root {
    color-scheme: dark;
    --background: #080b10;
    --surface: #10151d;
    --surface-raised: #151c26;
    --line: #263142;
    --text: #f4f7fb;
    --muted: #9aa9bc;
    --accent: #7dd3fc;
    --accent-strong: #22d3ee;
    --success: #4ade80;
    font-family:
        Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
        "Segoe UI", sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at 85% 5%, #12324a 0, transparent 30rem),
        var(--background);
    color: var(--text);
}

a {
    color: inherit;
}

.site-header {
    min-height: 5rem;
    padding: 1rem clamp(1.25rem, 4vw, 4.5rem);
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background: rgb(8 11 16 / 82%);
    backdrop-filter: blur(18px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--text);
    text-decoration: none;
}

.brand-mark {
    width: 2.75rem;
    height: 2.75rem;
    border: 1px solid #3f536b;
    border-radius: 0.7rem;
    display: grid;
    place-items: center;
    background: linear-gradient(145deg, #172333, #0d1219);
    color: var(--accent);
    font-family: Georgia, serif;
    font-size: 1.4rem;
}

.brand strong,
.brand small {
    display: block;
}

.brand strong {
    font-size: 1.05rem;
    letter-spacing: 0.04em;
}

.brand small,
.system-state,
.card-meta,
.count,
footer {
    color: var(--muted);
    font-size: 0.78rem;
}

.system-state {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0.75rem rgb(74 222 128 / 55%);
}

.version {
    margin-left: 0.45rem;
    font-family: ui-monospace, monospace;
}

main {
    width: min(74rem, calc(100% - 2.5rem));
    margin: 0 auto;
}

.hero {
    padding: clamp(4rem, 10vw, 8rem) 0 clamp(3rem, 7vw, 5rem);
    border-bottom: 1px solid var(--line);
}

.eyebrow {
    margin: 0 0 0.8rem;
    color: var(--accent-strong);
    font-family: ui-monospace, monospace;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.18em;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    max-width: 13ch;
    margin-bottom: 1.25rem;
    font-size: clamp(2.8rem, 7vw, 5.75rem);
    line-height: 0.98;
    letter-spacing: -0.055em;
}

.hero-copy {
    max-width: 42rem;
    margin-bottom: 0;
    color: var(--muted);
    font-size: clamp(1rem, 2vw, 1.25rem);
    line-height: 1.7;
}

.catalog {
    padding: 3.5rem 0 5rem;
}

.section-heading {
    margin-bottom: 2rem;
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 1rem;
}

.section-heading h2 {
    margin-bottom: 0;
    font-size: clamp(1.65rem, 4vw, 2.4rem);
}

.count,
.category {
    padding: 0.35rem 0.65rem;
    border: 1px solid var(--line);
    border-radius: 999px;
}

.capability-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
    gap: 1rem;
}

.capability-card,
.empty-state,
.detail-panel {
    border: 1px solid var(--line);
    border-radius: 1rem;
    background:
        linear-gradient(145deg, rgb(21 28 38 / 92%), rgb(12 16 23 / 96%));
}

.capability-card {
    min-height: 17rem;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    transition:
        border-color 160ms ease,
        transform 160ms ease;
}

.capability-card:hover {
    border-color: #46627d;
    transform: translateY(-2px);
}

.card-meta {
    margin-bottom: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.category {
    color: var(--accent);
    font-family: ui-monospace, monospace;
}

.capability-card h3 {
    font-size: 1.35rem;
}

.capability-card p,
.detail-panel > p,
.empty-state p {
    color: var(--muted);
    line-height: 1.65;
}

.capability-card a {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    color: var(--accent);
    font-weight: 650;
    text-decoration: none;
}

.empty-state {
    min-height: 15rem;
    padding: clamp(1.5rem, 5vw, 3rem);
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.empty-symbol {
    color: var(--accent);
    font-family: Georgia, serif;
    font-size: 4rem;
}

.empty-state h3 {
    margin-bottom: 0.6rem;
    font-size: 1.4rem;
}

.empty-state p {
    max-width: 35rem;
    margin-bottom: 0;
}

.detail {
    padding: clamp(3rem, 8vw, 6rem) 0;
}

.back-link {
    display: inline-block;
    margin-bottom: 1.5rem;
    color: var(--muted);
    text-decoration: none;
}

.detail-panel {
    max-width: 50rem;
    padding: clamp(1.5rem, 5vw, 3rem);
}

.detail-panel h1 {
    max-width: none;
    font-size: clamp(2.3rem, 6vw, 4rem);
}

dl {
    margin: 2.5rem 0 0;
    display: grid;
    gap: 1rem;
}

dl div {
    padding-top: 1rem;
    border-top: 1px solid var(--line);
}

dt {
    margin-bottom: 0.35rem;
    color: var(--muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

dd {
    margin: 0;
}

code {
    color: var(--accent);
}

.action-list {
    max-width: 50rem;
    margin-top: 1.25rem;
    display: grid;
    gap: 1.25rem;
}

.action-panel,
.empty-action {
    padding: clamp(1.5rem, 5vw, 3rem);
    border: 1px solid var(--line);
    border-radius: 1rem;
    background: var(--surface);
}

.action-heading {
    margin-bottom: 2rem;
}

.action-heading h2 {
    margin-bottom: 0.65rem;
    font-size: clamp(1.5rem, 4vw, 2rem);
}

.action-heading > p:last-child,
.form-field small,
.empty-action {
    color: var(--muted);
    line-height: 1.55;
}

form {
    display: grid;
    gap: 1.25rem;
}

.form-field {
    display: grid;
    gap: 0.5rem;
}

.form-field > label {
    font-size: 0.88rem;
    font-weight: 700;
}

.optional {
    margin-left: 0.4rem;
    color: var(--muted);
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

input,
textarea,
select {
    width: 100%;
    border: 1px solid #334155;
    border-radius: 0.65rem;
    padding: 0.8rem 0.9rem;
    background: #0b1017;
    color: var(--text);
    font: inherit;
}

textarea {
    min-height: 8rem;
    resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--accent);
    outline: 2px solid rgb(125 211 252 / 22%);
    outline-offset: 1px;
}

.checkbox-field {
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.checkbox-field input {
    width: 1rem;
    height: 1rem;
}

.field-invalid input,
.field-invalid textarea,
.field-invalid select {
    border-color: #fb7185;
}

.field-error {
    color: #fda4af;
    font-size: 0.8rem;
}

button {
    width: fit-content;
    border: 0;
    border-radius: 0.65rem;
    padding: 0.8rem 1.2rem;
    background: var(--accent);
    color: #071018;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

button:hover {
    background: var(--accent-strong);
}

.result-panel,
.error-panel {
    max-width: 56rem;
}

pre {
    max-width: 100%;
    margin: 2rem 0 0;
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 0.7rem;
    padding: 1rem;
    background: #080b10;
    line-height: 1.6;
}

.error-panel {
    border-color: #713244;
}

footer {
    padding: 1.5rem clamp(1.25rem, 4vw, 4.5rem);
    border-top: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
}

@media (max-width: 42rem) {
    .site-header,
    .section-heading,
    footer {
        align-items: flex-start;
        flex-direction: column;
    }

    .system-state {
        align-self: flex-start;
    }

    .empty-state {
        align-items: flex-start;
        flex-direction: column;
    }
}