:root {
    color-scheme: light;
    --bg-canvas: #f7f9fc;
    --bg-panel: rgba(255, 255, 255, 0.8);
    --bg-panel-strong: #ffffff;
    --bg-panel-soft: #eff4fb;
    --bg-hero: linear-gradient(180deg, #f4f8fe 0%, #eef4fb 100%);
    --bg-hero-accent: radial-gradient(circle at top left, rgba(14, 165, 233, 0.14), transparent 32%),
        radial-gradient(circle at top right, rgba(56, 189, 248, 0.12), transparent 28%);
    --bg-accent-section: linear-gradient(180deg, #0b1830 0%, #0f1f3c 100%);
    --text-primary: #0f1b2d;
    --text-secondary: #52617a;
    --text-muted: #6f819d;
    --text-on-dark: #edf3fb;
    --line: rgba(117, 143, 177, 0.24);
    --line-strong: rgba(57, 85, 122, 0.18);
    --accent: #0ea5e9;
    --accent-strong: #0284c7;
    --accent-soft: rgba(14, 165, 233, 0.12);
    --shadow-soft: 0 20px 55px rgba(15, 23, 42, 0.08);
    --shadow-strong: 0 28px 70px rgba(15, 23, 42, 0.14);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 18px;
    --transition: 180ms ease;
}

html[data-theme="dark"] {
    color-scheme: dark;
    --bg-canvas: #060d18;
    --bg-panel: rgba(11, 23, 42, 0.78);
    --bg-panel-strong: #0d1b2f;
    --bg-panel-soft: #0a1528;
    --bg-hero: linear-gradient(180deg, #07111f 0%, #0a1629 100%);
    --bg-hero-accent: radial-gradient(circle at top left, rgba(14, 165, 233, 0.22), transparent 32%),
        radial-gradient(circle at top right, rgba(56, 189, 248, 0.18), transparent 28%);
    --bg-accent-section: linear-gradient(180deg, #071120 0%, #091425 100%);
    --text-primary: #edf3fb;
    --text-secondary: #b6c7dd;
    --text-muted: #94a9c5;
    --text-on-dark: #edf3fb;
    --line: rgba(148, 169, 197, 0.16);
    --line-strong: rgba(148, 169, 197, 0.2);
    --accent: #67d3ff;
    --accent-strong: #22b8f6;
    --accent-soft: rgba(103, 211, 255, 0.12);
    --shadow-soft: 0 22px 60px rgba(0, 0, 0, 0.24);
    --shadow-strong: 0 32px 80px rgba(0, 0, 0, 0.34);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text-primary);
    background:
        radial-gradient(circle at top center, rgba(14, 165, 233, 0.06), transparent 24%),
        var(--bg-canvas);
    line-height: 1.6;
    transition: background-color var(--transition), color var(--transition);
}

a {
    color: inherit;
    text-decoration: none;
}

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

.shell {
    width: min(1180px, calc(100% - 2rem));
    margin: 0 auto;
}

.shell--spec {
    width: min(1360px, calc(100% - 2rem));
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(18px);
    background: color-mix(in srgb, var(--bg-canvas) 76%, transparent);
    border-bottom: 1px solid var(--line);
}

.site-header__inner {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.85rem;
    padding: 0.8rem 0;
}

.site-header__menu {
    display: contents;
}

.site-header__actions {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    justify-content: flex-end;
    gap: 0.45rem;
    justify-self: end;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.brand:hover .brand__mark,
.brand:hover .brand__logo {
    transform: translateY(-1px) scale(1.03);
    box-shadow: 0 10px 28px rgba(14, 165, 233, 0.25);
}

.brand__mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.3rem;
    height: 2.3rem;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #03111d;
    box-shadow: 0 10px 24px rgba(14, 165, 233, 0.18);
    transition: transform var(--transition), box-shadow var(--transition);
}

.brand__logo {
    display: block;
    width: auto;
    height: 2.25rem;
    transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}

.brand__logo--dark {
    display: none;
}

.brand__logo--full {
    width: clamp(10.5rem, 13vw, 13.5rem);
    height: auto;
}

.brand--with-image {
    gap: 0.58rem;
}

html[data-theme="dark"] .brand__logo {
    filter: brightness(1.02) contrast(1.03);
}

html[data-theme="dark"] .brand__logo--light {
    display: none;
}

html[data-theme="dark"] .brand__logo--dark {
    display: block;
    filter: none;
}

.brand__badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 1.25rem;
    padding: 0.12rem 0.5rem;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line));
    background: color-mix(in srgb, var(--accent-soft) 70%, transparent);
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 0.26rem;
    width: 2.4rem;
    height: 2.4rem;
    padding: 0;
    margin-left: auto;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: color-mix(in srgb, var(--bg-panel-strong) 80%, transparent);
    cursor: pointer;
    transition: transform var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.menu-toggle:hover {
    transform: translateY(-1px);
    border-color: color-mix(in srgb, var(--accent) 22%, var(--line));
    box-shadow: var(--shadow-soft);
}

.menu-toggle__bar {
    width: 0.9rem;
    height: 2px;
    border-radius: 999px;
    background: var(--text-primary);
}

.site-nav {
    display: flex;
    flex-wrap: nowrap;
    justify-content: center;
    gap: 0.2rem;
    min-width: 0;
    justify-self: center;
}

.site-nav a,
.theme-toggle {
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0.54rem 0.72rem;
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}

.site-nav a:hover,
.site-nav a.is-active,
.theme-toggle:hover {
    color: var(--text-primary);
    background: color-mix(in srgb, var(--bg-panel-strong) 86%, transparent);
    border-color: var(--line);
    transform: translateY(-1px);
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.2rem;
    min-width: 2.2rem;
    height: 2.2rem;
    padding: 0;
    background: transparent;
    cursor: pointer;
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 2.1rem;
    padding: 0.42rem 0.72rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    white-space: nowrap;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition), color var(--transition);
}

.nav-cta:hover {
    transform: translateY(-1px);
}

.nav-cta__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 0.9rem;
    height: 0.9rem;
}

.nav-cta__icon .icon {
    width: 0.85rem;
    height: 0.85rem;
}

.nav-cta--ghost {
    color: var(--text-secondary);
    background: color-mix(in srgb, var(--bg-panel-strong) 72%, transparent);
}

.nav-cta--ghost:hover {
    color: var(--text-primary);
    background: color-mix(in srgb, var(--bg-panel-strong) 90%, transparent);
    box-shadow: var(--shadow-soft);
}

.nav-cta--primary {
    color: #04101b;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    border-color: transparent;
    box-shadow: 0 10px 24px rgba(14, 165, 233, 0.18);
}

.nav-cta--primary:hover {
    box-shadow: 0 14px 28px rgba(14, 165, 233, 0.22);
}

html[data-theme="dark"] .nav-cta--primary {
    color: #04101b;
}

.theme-toggle__dot {
    width: 0.62rem;
    height: 0.62rem;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    box-shadow: 0 0 0 4px var(--accent-soft);
}

.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;
}

.hero {
    position: relative;
    overflow: hidden;
    padding: 6.5rem 0 5rem;
    background: var(--bg-hero-accent), var(--bg-hero);
    border-bottom: 1px solid var(--line);
}

.hero::after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    height: 160px;
    background: linear-gradient(180deg, transparent 0%, color-mix(in srgb, var(--bg-canvas) 92%, transparent) 100%);
    pointer-events: none;
}

.hero__grid,
.two-column,
.resource-layout {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
}

.hero h1,
.section h2 {
    line-height: 1.02;
    letter-spacing: -0.05em;
}

.hero h1 {
    font-size: clamp(2.7rem, 7vw, 5.2rem);
    max-width: 12ch;
    margin-bottom: 1rem;
}

.hero-copy,
.hero-support,
.section-heading p,
.card p,
.stack-row p,
.footer-copy,
.feature-list,
.scope-panel,
.resource-aside,
.quote-panel p,
.hero-card__copy {
    color: var(--text-secondary);
}

.hero-support {
    max-width: 42rem;
}

.announcement,
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: 1rem;
    padding: 0.38rem 0.8rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg-panel-strong) 82%, transparent);
    box-shadow: var(--shadow-soft);
    font-size: 0.77rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.announcement {
    color: var(--accent-strong);
}

.eyebrow {
    color: var(--accent);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-top: 2rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.1rem;
    padding: 0.88rem 1.28rem;
    border-radius: 999px;
    font-weight: 700;
    border: 1px solid transparent;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition), color var(--transition);
}

.button:hover {
    transform: translateY(-2px);
}

.button--primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #04101b;
    box-shadow: 0 18px 36px rgba(14, 165, 233, 0.22);
}

.button--secondary,
.button--ghost {
    color: var(--text-primary);
    background: color-mix(in srgb, var(--bg-panel-strong) 82%, transparent);
    border-color: var(--line);
}

.button--secondary:hover,
.button--ghost:hover {
    box-shadow: var(--shadow-soft);
}

.hero-card,
.card,
.scope-panel,
.quote-panel,
.industry-card,
.cta-panel,
.stack-row,
.stage-card,
.code-panel,
.resource-aside {
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    background: color-mix(in srgb, var(--bg-panel-strong) 84%, transparent);
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

.hero-card:hover,
.card:hover,
.industry-card:hover,
.stack-row:hover,
.stage-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-strong);
    border-color: color-mix(in srgb, var(--accent) 24%, var(--line));
}

.hero-card {
    padding: 1.8rem;
}

.hero-card__title,
.footer-title,
.stack-label {
    color: var(--text-primary);
    font-weight: 700;
}

.hero-card--visual {
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--bg-panel-soft) 78%, transparent), color-mix(in srgb, var(--bg-panel-strong) 92%, transparent));
}

.protocol-visual {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin-top: 1rem;
    overflow: visible;
}

.protocol-stage {
    position: relative;
    display: block;
}

.protocol-stage summary {
    list-style: none;
}

.protocol-stage summary::-webkit-details-marker {
    display: none;
}

.protocol-node {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.16rem;
    padding: 0.75rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg-panel-strong) 90%, transparent);
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

.protocol-node:hover,
.protocol-stage[open] .protocol-node,
.protocol-stage:focus-within .protocol-node {
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
    border-color: color-mix(in srgb, var(--accent) 22%, var(--line));
}

.protocol-node__label {
    font-size: 0.95rem;
}

.protocol-node__hint {
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.protocol-popover {
    position: absolute;
    left: 50%;
    bottom: calc(100% + 0.9rem);
    z-index: 12;
    width: min(20rem, calc(100vw - 3rem));
    padding: 1rem;
    border: 1px solid color-mix(in srgb, var(--accent) 14%, var(--line));
    border-radius: 22px;
    background: color-mix(in srgb, var(--bg-panel-strong) 94%, transparent);
    box-shadow: var(--shadow-strong);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translate(-50%, 0.6rem) scale(0.98);
    transform-origin: bottom center;
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
    backdrop-filter: blur(18px);
}

.protocol-stage[data-popover-placement="bottom"] .protocol-popover {
    top: calc(100% + 0.9rem);
    bottom: auto;
    transform: translate(-50%, -0.6rem) scale(0.98);
    transform-origin: top center;
}

.protocol-stage[data-popover-align="start"] .protocol-popover {
    left: 0;
    transform: translate(0, 0.6rem) scale(0.98);
}

.protocol-stage[data-popover-align="end"] .protocol-popover {
    left: auto;
    right: 0;
    transform: translate(0, 0.6rem) scale(0.98);
}

.protocol-stage[data-popover-placement="bottom"][data-popover-align="start"] .protocol-popover {
    transform: translate(0, -0.6rem) scale(0.98);
}

.protocol-stage[data-popover-placement="bottom"][data-popover-align="end"] .protocol-popover {
    transform: translate(0, -0.6rem) scale(0.98);
}

.protocol-stage[open] .protocol-popover,
.protocol-stage:focus-within .protocol-popover {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translate(-50%, 0) scale(1);
}

.protocol-stage[data-popover-align="start"][open] .protocol-popover,
.protocol-stage[data-popover-align="start"]:focus-within .protocol-popover,
.protocol-stage[data-popover-align="end"][open] .protocol-popover,
.protocol-stage[data-popover-align="end"]:focus-within .protocol-popover {
    transform: translate(0, 0) scale(1);
}

@media (hover: hover) {
    .protocol-stage:hover .protocol-popover {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translate(-50%, 0) scale(1);
    }

    .protocol-stage[data-popover-align="start"]:hover .protocol-popover,
    .protocol-stage[data-popover-align="end"]:hover .protocol-popover {
        transform: translate(0, 0) scale(1);
    }
}

.protocol-popover__eyebrow {
    margin-bottom: 0.45rem;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-strong);
}

.protocol-popover h3 {
    margin-bottom: 0.45rem;
    font-size: 1rem;
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.protocol-popover p {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.protocol-popover__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-bottom: 0.8rem;
}

.protocol-popover__meta span {
    padding: 0.32rem 0.6rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--accent-soft) 60%, var(--bg-panel-soft));
    color: var(--text-primary);
    font-size: 0.72rem;
    font-weight: 700;
}

.protocol-popover__facts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.protocol-popover__facts span {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.protocol-popover__facts strong {
    display: block;
    font-size: 0.88rem;
    line-height: 1.45;
    color: var(--text-primary);
}

.specification-summary {
    overflow: hidden;
}

.spec-chip-cloud,
.spec-compatibility-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
    margin-top: 1.4rem;
}

.spec-chip-cloud span,
.spec-compatibility-grid div,
.spec-badge,
.spec-presence {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.4rem 0.72rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg-panel-strong) 82%, transparent);
    color: var(--text-secondary);
    font-size: 0.76rem;
    font-weight: 700;
}

.spec-badge {
    flex: 0 0 auto;
    align-self: flex-start;
    white-space: nowrap;
    border-color: rgba(14, 165, 233, 0.18);
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.16), rgba(103, 211, 255, 0.14));
    color: var(--accent-strong);
    box-shadow: inset 0 0 0 1px rgba(14, 165, 233, 0.08);
}

.spec-toolbar {
    display: grid;
    gap: 1.35rem;
}

.spec-toolbar__heading {
    margin-bottom: 0;
}

.spec-use-case-grid,
.spec-model-grid,
.spec-relationship-grid,
.spec-api-grid {
    display: grid;
    gap: 1rem;
}

.spec-use-case-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.spec-use-case {
    display: flex;
    align-items: flex-start;
    gap: 0.9rem;
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: color-mix(in srgb, var(--bg-panel-strong) 88%, transparent);
    color: inherit;
    text-align: left;
    cursor: pointer;
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.spec-use-case:hover,
.spec-use-case.is-active {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--accent) 22%, var(--line));
    box-shadow: var(--shadow-strong);
}

.spec-use-case .icon-badge {
    width: 2.65rem;
    height: 2.65rem;
    margin-bottom: 0;
    flex: 0 0 auto;
}

.spec-use-case__content {
    display: grid;
    gap: 0.25rem;
}

.spec-use-case__content strong {
    color: var(--text-primary);
}

.spec-use-case__content span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.spec-model-grid {
    grid-template-columns: 1fr;
}

.spec-model {
    padding: 1.5rem;
    border: 1px solid var(--line);
    border-radius: 28px;
    background: color-mix(in srgb, var(--bg-panel-strong) 90%, transparent);
    box-shadow: var(--shadow-soft);
    max-width: 100%;
}

.spec-model__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.spec-model__header .icon-badge {
    margin-bottom: 0.85rem;
}

.spec-model__header h3 {
    margin-bottom: 0.45rem;
}

.spec-model__header p,
.spec-example p,
.spec-operation p,
.spec-relationship-card p {
    color: var(--text-secondary);
}

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

.spec-model__controls label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.spec-model__selector {
    min-width: 12rem;
    padding: 0.65rem 0.8rem;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: color-mix(in srgb, var(--bg-panel-strong) 94%, transparent);
    color: var(--text-primary);
    font: inherit;
}

.spec-example-stack {
    margin-bottom: 1rem;
}

.spec-example {
    display: none;
    padding: 1rem;
    border: 1px solid color-mix(in srgb, var(--accent) 16%, var(--line));
    border-radius: 22px;
    background: linear-gradient(135deg, color-mix(in srgb, var(--accent-soft) 48%, var(--bg-panel-soft)), color-mix(in srgb, var(--bg-panel-strong) 94%, transparent));
}

.spec-example.is-visible {
    display: block;
}

.spec-example__eyebrow {
    margin-bottom: 0.35rem;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-strong);
}

.spec-example h4 {
    margin-bottom: 0.4rem;
    font-size: 1rem;
}

.spec-example__fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    margin-top: 0.85rem;
}

.spec-example__fields div {
    padding: 0.75rem;
    border-radius: 18px;
    background: color-mix(in srgb, var(--bg-panel-strong) 82%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 14%, var(--line));
}

.spec-example__fields span,
.spec-linked-models__title {
    display: block;
    margin-bottom: 0.22rem;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.spec-example__fields strong {
    display: block;
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.45;
}

.spec-table-wrap {
    overflow-x: auto;
    margin-bottom: 1rem;
    border: 1px solid var(--line);
    border-radius: 20px;
}

.spec-table {
    width: 100%;
    min-width: 52rem;
    border-collapse: collapse;
    background: color-mix(in srgb, var(--bg-panel-strong) 92%, transparent);
}

.spec-table th,
.spec-table td {
    padding: 0.9rem 0.85rem;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.spec-table th {
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: color-mix(in srgb, var(--bg-panel-soft) 84%, transparent);
}

.spec-table tr:last-child td {
    border-bottom: 0;
}

.spec-table code,
.spec-operation code {
    font-family: "SFMono-Regular", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    color: var(--text-primary);
}

.spec-type-link {
    color: var(--accent-strong);
    font-weight: 700;
}

.spec-type-link:hover {
    color: var(--accent);
}

.spec-presence--required {
    color: #0369a1;
    border-color: rgba(3, 105, 161, 0.16);
    background: rgba(56, 189, 248, 0.12);
}

.spec-presence--optional {
    color: var(--text-muted);
}

.spec-linked-models {
    margin-bottom: 1rem;
}

.spec-linked-models__grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.spec-link-pill {
    display: inline-flex;
    flex-direction: column;
    gap: 0.12rem;
    padding: 0.72rem 0.88rem;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: color-mix(in srgb, var(--bg-panel-strong) 88%, transparent);
}

.spec-link-pill span {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-muted);
}

.spec-link-pill strong {
    color: var(--text-primary);
}

.spec-operation-list {
    display: grid;
    gap: 0.8rem;
}

.spec-operation {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.8rem;
    align-items: start;
    padding: 0.9rem;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: color-mix(in srgb, var(--bg-panel-strong) 86%, transparent);
}

.spec-method {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 3.4rem;
    padding: 0.34rem 0.55rem;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #04101b;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.spec-method--get {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: #03120a;
}

.spec-method--post {
    background: linear-gradient(135deg, #38bdf8, #0284c7);
    color: #04101b;
}

.spec-method--patch {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #1f1303;
}

.spec-method--delete {
    background: linear-gradient(135deg, #fb7185, #e11d48);
    color: #2b0712;
}

.spec-operation p {
    margin: 0.3rem 0 0;
    font-size: 0.9rem;
}

.spec-relationship-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.spec-relationship-card {
    padding: 1.2rem;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: color-mix(in srgb, var(--bg-panel-strong) 88%, transparent);
    box-shadow: var(--shadow-soft);
}

.spec-relationship-card__path {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 0.45rem;
    color: var(--text-primary);
}

.spec-relationship-card p {
    margin-bottom: 0.85rem;
}

.spec-api-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.spec-api-card {
    height: 100%;
}

.protocol-node--primary,
.protocol-node--accent {
    background: linear-gradient(135deg, color-mix(in srgb, var(--accent-soft) 60%, var(--bg-panel-strong)), color-mix(in srgb, var(--bg-panel-strong) 88%, transparent));
}

.protocol-link {
    width: 1.5rem;
    height: 1px;
    background: linear-gradient(90deg, var(--accent), transparent);
}

.metric-row {
    display: grid;
    gap: 0.85rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 1.5rem;
}

.metric-chip {
    padding: 1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg-panel-strong) 88%, transparent);
}

.metric-chip strong {
    display: block;
    font-size: 1.35rem;
    line-height: 1;
    margin-bottom: 0.35rem;
}

.metric-chip span {
    color: var(--text-muted);
    font-size: 0.88rem;
}

.section {
    padding: 5.4rem 0;
}

.section--thin {
    padding: 1.8rem 0 0;
}

.section--muted {
    background: color-mix(in srgb, var(--bg-panel-soft) 70%, transparent);
}

.section--accent {
    background: var(--bg-accent-section);
    color: var(--text-on-dark);
}

html[data-theme="dark"] .section--accent {
    background: linear-gradient(180deg, #08101d 0%, #0c1626 100%);
}

.section--accent .card,
.section--accent .cta-panel,
.section--accent .stack-row {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.1);
}

.section--accent .card p,
.section--accent .section-heading p,
.section--accent .stack-row p,
.section--accent .cta-panel p,
.section--accent .hero-actions a.button--secondary {
    color: var(--text-on-dark);
}

.section-heading {
    max-width: 52rem;
    margin-bottom: 2.1rem;
}

.section h2 {
    font-size: clamp(2rem, 5vw, 3.4rem);
    margin-bottom: 1rem;
}

.marquee-grid,
.card-grid,
.stack-grid,
.workflow-card-grid,
.participant-grid,
.industry-grid,
.pill-grid,
.lifecycle-track,
.footer-grid {
    display: grid;
    gap: 1.2rem;
}

.marquee-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.marquee-grid div {
    padding: 1rem 1.15rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg-panel-strong) 82%, transparent);
    color: var(--text-secondary);
    text-align: center;
    font-size: 0.92rem;
}

.card-grid--three,
.industry-grid,
.workflow-card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid--two,
.participant-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.participant-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.card,
.industry-card,
.scope-panel,
.code-panel,
.resource-aside {
    padding: 1.6rem;
}

.card h3,
.industry-card h3,
.industry-card h2,
.scope-panel h2 {
    margin-bottom: 0.65rem;
}

.icon-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    margin-bottom: 1rem;
    border-radius: 18px;
    background: linear-gradient(135deg, var(--accent-soft), color-mix(in srgb, var(--bg-panel-strong) 90%, transparent));
    color: var(--accent-strong);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 18%, transparent);
}

.icon {
    width: 1.35rem;
    height: 1.35rem;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin-top: 0.9rem;
    color: var(--accent-strong);
    font-weight: 700;
}

.text-link::after {
    content: "→";
    transition: transform var(--transition);
}

.text-link:hover::after {
    transform: translateX(3px);
}

.workflow-card {
    padding: 1.6rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    background: color-mix(in srgb, var(--bg-panel-strong) 84%, transparent);
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.workflow-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-strong);
    border-color: color-mix(in srgb, var(--accent) 24%, var(--line));
}

.workflow-card__header {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.workflow-card__header h3 {
    margin-bottom: 0.25rem;
}

.workflow-card__header p {
    margin-bottom: 0;
    color: var(--text-secondary);
}

.workflow-overlay {
    display: grid;
    gap: 0.85rem;
}

.workflow-overlay--compact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.workflow-overlay--full {
    grid-template-columns: repeat(7, minmax(0, 1fr));
}

.workflow-stage {
    position: relative;
    padding: 1rem;
    border-radius: 20px;
    border: 1px solid transparent;
    background: color-mix(in srgb, var(--bg-panel-soft) 65%, var(--bg-panel-strong));
    overflow: hidden;
}

.workflow-stage::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 4px;
    background: currentColor;
    opacity: 0.55;
}

.workflow-stage__protocol {
    display: inline-block;
    margin-bottom: 0.5rem;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.workflow-stage__domain {
    display: block;
    font-size: 1rem;
    line-height: 1.2;
    color: var(--text-primary);
}

.workflow-stage__detail {
    margin: 0.55rem 0 0;
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.workflow-stage--detailed {
    min-height: 100%;
}

.workflow-stage--cyan {
    color: #0891b2;
    background: linear-gradient(180deg, rgba(34, 211, 238, 0.15), rgba(255, 255, 255, 0.84));
    border-color: rgba(8, 145, 178, 0.18);
}

.workflow-stage--violet {
    color: #7c3aed;
    background: linear-gradient(180deg, rgba(167, 139, 250, 0.16), rgba(255, 255, 255, 0.84));
    border-color: rgba(124, 58, 237, 0.18);
}

.workflow-stage--amber {
    color: #b45309;
    background: linear-gradient(180deg, rgba(251, 191, 36, 0.18), rgba(255, 255, 255, 0.84));
    border-color: rgba(180, 83, 9, 0.18);
}

.workflow-stage--emerald {
    color: #047857;
    background: linear-gradient(180deg, rgba(52, 211, 153, 0.16), rgba(255, 255, 255, 0.84));
    border-color: rgba(4, 120, 87, 0.18);
}

.workflow-stage--rose {
    color: #be123c;
    background: linear-gradient(180deg, rgba(251, 113, 133, 0.16), rgba(255, 255, 255, 0.84));
    border-color: rgba(190, 18, 60, 0.18);
}

.workflow-stage--sky {
    color: #0369a1;
    background: linear-gradient(180deg, rgba(56, 189, 248, 0.18), rgba(255, 255, 255, 0.84));
    border-color: rgba(3, 105, 161, 0.18);
}

.workflow-stage--slate {
    color: #475569;
    background: linear-gradient(180deg, rgba(148, 163, 184, 0.18), rgba(255, 255, 255, 0.84));
    border-color: rgba(71, 85, 105, 0.18);
}

html[data-theme="dark"] .workflow-stage--cyan {
    background: linear-gradient(180deg, rgba(34, 211, 238, 0.18), rgba(8, 19, 33, 0.92));
}

html[data-theme="dark"] .workflow-stage--violet {
    background: linear-gradient(180deg, rgba(167, 139, 250, 0.18), rgba(8, 19, 33, 0.92));
}

html[data-theme="dark"] .workflow-stage--amber {
    background: linear-gradient(180deg, rgba(251, 191, 36, 0.18), rgba(8, 19, 33, 0.92));
}

html[data-theme="dark"] .workflow-stage--emerald {
    background: linear-gradient(180deg, rgba(52, 211, 153, 0.18), rgba(8, 19, 33, 0.92));
}

html[data-theme="dark"] .workflow-stage--rose {
    background: linear-gradient(180deg, rgba(251, 113, 133, 0.18), rgba(8, 19, 33, 0.92));
}

html[data-theme="dark"] .workflow-stage--sky {
    background: linear-gradient(180deg, rgba(56, 189, 248, 0.18), rgba(8, 19, 33, 0.92));
}

html[data-theme="dark"] .workflow-stage--slate {
    background: linear-gradient(180deg, rgba(148, 163, 184, 0.18), rgba(8, 19, 33, 0.92));
}

.stack-row {
    padding: 1.35rem 1.45rem;
}

.stack-label {
    display: inline-block;
    margin-bottom: 0.35rem;
}

.stack-grid--accent .stack-row p {
    color: var(--text-on-dark);
}

.lifecycle-track {
    grid-template-columns: repeat(7, minmax(0, 1fr));
}

.stage-card {
    padding: 1.4rem;
}

.pill-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.pill-grid div,
.mini-tags span {
    padding: 0.92rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg-panel-strong) 86%, transparent);
    font-weight: 600;
    color: var(--text-secondary);
}

.quote-panel {
    padding: 1.9rem;
    background: linear-gradient(135deg, color-mix(in srgb, var(--accent-soft) 60%, var(--bg-panel-soft)), color-mix(in srgb, var(--bg-panel-strong) 92%, transparent));
}

.quote-panel p {
    font-size: 1.1rem;
    margin-bottom: 0;
}

.scope-panel--secondary {
    background: color-mix(in srgb, var(--bg-panel-soft) 85%, transparent);
}

.check-list {
    padding-left: 1.1rem;
    margin-bottom: 0;
}

.check-list li + li {
    margin-top: 0.75rem;
}

.code-panel {
    overflow: hidden;
    background: linear-gradient(180deg, color-mix(in srgb, var(--bg-panel-soft) 78%, transparent), color-mix(in srgb, var(--bg-panel-strong) 94%, transparent));
}

.code-panel__header {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--line);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.code-panel pre {
    margin: 0;
    padding-top: 1rem;
    white-space: pre-wrap;
    color: var(--text-primary);
    font-family: "SFMono-Regular", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.93rem;
}

.mini-list {
    display: grid;
    gap: 0.85rem;
}

.mini-list > div {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--text-secondary);
}

.mini-list__dot {
    width: 0.65rem;
    height: 0.65rem;
    margin-top: 0.4rem;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    flex: 0 0 auto;
}

.mini-list--dense {
    gap: 0.7rem;
}

.mini-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.industry-card {
    display: block;
}

.industry-card--expanded {
    display: flex;
    flex-direction: column;
}

.resource-aside h2,
.industry-card h2 {
    font-size: clamp(1.7rem, 3vw, 2.3rem);
    line-height: 1.08;
    letter-spacing: -0.03em;
}

.cta-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    padding: 2rem;
}

.cta-panel--muted {
    background: color-mix(in srgb, var(--bg-panel-soft) 80%, transparent);
}

.site-footer {
    padding: 3rem 0;
    background: color-mix(in srgb, var(--bg-panel-soft) 30%, var(--bg-canvas));
    border-top: 1px solid var(--line);
}

.footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
}

.footer-links {
    display: grid;
    gap: 0.55rem;
}

.footer-links a,
.site-footer a {
    color: var(--text-secondary);
}

.footer-links a:hover,
.site-footer a:hover {
    color: var(--text-primary);
}

@media (max-width: 1080px) {
    .marquee-grid,
    .participant-grid,
    .lifecycle-track,
    .workflow-overlay--full {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .card-grid--three,
    .industry-grid,
    .workflow-card-grid,
    .pill-grid,
    .footer-grid,
    .spec-use-case-grid,
    .spec-relationship-grid,
    .spec-api-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 920px) {
    .hero__grid,
    .two-column,
    .resource-layout,
    .card-grid--two,
    .card-grid--three,
    .workflow-card-grid,
    .pill-grid,
    .industry-grid,
    .participant-grid,
    .marquee-grid,
    .lifecycle-track,
    .workflow-overlay--full,
    .workflow-overlay--compact,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .cta-panel {
        flex-direction: column;
        align-items: flex-start;
    }

    .site-header__inner {
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 0.75rem;
    }

    .brand__logo--full {
        width: 11.2rem;
    }

    .site-header__menu {
        display: none;
        grid-column: 1 / -1;
        grid-template-columns: 1fr;
        width: 100%;
        gap: 0.75rem;
        padding: 0.9rem;
        border: 1px solid var(--line);
        border-radius: 22px;
        background: color-mix(in srgb, var(--bg-panel-strong) 88%, transparent);
        box-shadow: var(--shadow-soft);
    }

    .site-header__menu.is-open {
        display: grid;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .site-header__actions {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 0.55rem;
    }

    .site-nav {
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.4rem;
    }

    .site-nav a {
        width: 100%;
        text-align: center;
    }

    .nav-cta {
        width: 100%;
        justify-content: center;
    }

    .nav-cta--primary {
        width: 100%;
    }

    .theme-toggle {
        margin-left: 0;
        align-self: flex-start;
    }

    .hero {
        padding: 5.7rem 0 4.4rem;
    }

    .hero h1 {
        max-width: none;
    }

    .workflow-card__header {
        align-items: center;
    }

    .cta-panel {
        padding: 1.7rem;
    }

    .spec-model-grid,
    .spec-use-case-grid,
    .spec-relationship-grid,
    .spec-api-grid {
        grid-template-columns: 1fr;
    }

    .spec-model__controls {
        flex-direction: column;
        align-items: flex-start;
    }

    .spec-model__selector {
        width: 100%;
        min-width: 0;
    }
}

@media (max-width: 640px) {
    .shell {
        width: min(1180px, calc(100% - 1.25rem));
    }

    .shell--spec {
        width: min(1360px, calc(100% - 1.25rem));
    }

    .hero {
        padding: 5.2rem 0 4rem;
    }

    .section {
        padding: 4rem 0;
    }

    .hero-actions {
        align-items: stretch;
    }

    .button {
        width: 100%;
        justify-content: center;
    }

    .site-header__menu {
        padding: 0.8rem;
    }

    .announcement,
    .eyebrow {
        max-width: 100%;
        white-space: normal;
        line-height: 1.35;
    }

    .hero-card,
    .card,
    .scope-panel,
    .quote-panel,
    .industry-card,
    .cta-panel,
    .stack-row,
    .stage-card,
    .code-panel,
    .resource-aside,
    .workflow-card {
        padding: 1.25rem;
    }

    .protocol-link {
        display: none;
    }

    .protocol-stage {
        width: 100%;
    }

    .protocol-popover {
        position: static;
        width: 100%;
        margin-top: 0.75rem;
        transform: none;
    }

    .protocol-stage[open] .protocol-popover,
    .protocol-stage:focus-within .protocol-popover {
        transform: none;
    }

    .protocol-stage[data-popover-placement="bottom"] .protocol-popover,
    .protocol-stage[data-popover-align="start"] .protocol-popover,
    .protocol-stage[data-popover-align="end"] .protocol-popover {
        transform: none;
    }

    .protocol-popover__facts {
        grid-template-columns: 1fr;
    }

    .spec-model {
        padding: 1.2rem;
    }

    .spec-model__header,
    .spec-operation {
        grid-template-columns: 1fr;
        display: grid;
    }

    .spec-example__fields {
        grid-template-columns: 1fr;
    }

    .spec-table {
        min-width: 34rem;
    }

    .spec-chip-cloud,
    .spec-compatibility-grid {
        gap: 0.55rem;
    }

    .code-panel__header {
        flex-wrap: wrap;
    }

    .workflow-stage {
        padding: 0.92rem;
    }

    .metric-row {
        grid-template-columns: 1fr;
    }
}