:root {
    --interchange-bg: #0c1222;
    --interchange-surface: #111a2e;
    --interchange-surface-2: #162038;
    --interchange-text: #e2e8f0;
    --interchange-muted: #9aa8bd;
    --interchange-accent: #e8613a;
    --interchange-cyan: #35c6df;
    --interchange-border: rgba(255, 255, 255, 0.1);
    --interchange-focus: #8edff1;
}

html {
    scroll-behavior: smooth;
}

.interchange-page {
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at 12% 8%, rgba(53, 198, 223, 0.09), transparent 26rem),
        radial-gradient(circle at 88% 2%, rgba(232, 97, 58, 0.11), transparent 28rem),
        var(--interchange-bg);
    color: var(--interchange-text);
    font-family: "Inter", ui-sans-serif, system-ui, sans-serif;
}

.interchange-page *,
.interchange-page *::before,
.interchange-page *::after {
    box-sizing: border-box;
}

.interchange-main {
    width: min(1200px, calc(100% - 2rem));
    margin: 0 auto;
}

.interchange-main h1,
.interchange-main h2,
.interchange-main h3,
.interchange-footer strong {
    font-family: "Space Grotesk", "Inter", ui-sans-serif, sans-serif;
    letter-spacing: -0.035em;
}

.interchange-main h1 {
    max-width: 14ch;
    margin: 0.9rem 0 1.25rem;
    font-size: 3.8rem;
    line-height: 0.98;
}

.interchange-main h2 {
    max-width: 18ch;
    margin: 0.35rem 0 0.8rem;
    font-size: 2.5rem;
    line-height: 1.05;
}

.interchange-main h3 {
    margin: 0.75rem 0 0.55rem;
    font-size: 1.2rem;
    line-height: 1.2;
}

.interchange-main p {
    color: var(--interchange-muted);
    line-height: 1.68;
}

.interchange-main a,
.interchange-footer a {
    color: inherit;
}

.interchange-eyebrow,
.interchange-kicker {
    margin: 0;
    color: #f59a7d !important;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.interchange-hero {
    display: grid;
    min-height: min(760px, calc(100vh - 4rem));
    padding: clamp(3.5rem, 7vw, 6.5rem) 0 4rem;
    align-items: center;
    grid-template-columns: minmax(0, 0.92fr) minmax(380px, 1.08fr);
    gap: clamp(2rem, 5vw, 4.5rem);
}

.interchange-hero-copy {
    min-width: 0;
}

.interchange-lede {
    max-width: 60ch;
    margin: 0;
    font-size: 1.1rem;
}

.interchange-runtime {
    display: inline-flex;
    max-width: 100%;
    min-height: 2.6rem;
    margin-top: 1.5rem;
    padding: 0.58rem 0.8rem;
    align-items: center;
    gap: 0.6rem;
    border: 1px solid var(--interchange-border);
    border-radius: 0.65rem;
    background: rgba(255, 255, 255, 0.035);
    color: var(--interchange-text);
    font-family: "JetBrains Mono", ui-monospace, monospace;
    font-size: 0.76rem;
    line-height: 1.4;
}

.interchange-runtime-dot {
    flex: 0 0 auto;
    width: 0.55rem;
    height: 0.55rem;
    border-radius: 50%;
    background: #f5b642;
    box-shadow: 0 0 0 0.25rem rgba(245, 182, 66, 0.12);
}

.interchange-runtime[data-state="ready"] .interchange-runtime-dot {
    background: #4ade80;
    box-shadow: 0 0 0 0.25rem rgba(74, 222, 128, 0.12);
}

.interchange-runtime[data-state="unknown"] .interchange-runtime-dot {
    background: #94a3b8;
    box-shadow: 0 0 0 0.25rem rgba(148, 163, 184, 0.12);
}

.interchange-actions {
    display: flex;
    margin-top: 1.45rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.interchange-button {
    display: inline-flex;
    max-width: 100%;
    min-height: 3rem;
    padding: 0.72rem 1rem;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--interchange-border);
    border-radius: 0.68rem;
    font-size: 0.9rem;
    font-weight: 700;
    line-height: 1.3;
    text-align: center;
    text-decoration: none;
    white-space: normal;
}

.interchange-button-primary {
    border-color: var(--interchange-accent);
    background: var(--interchange-accent);
    color: #0c1222 !important;
}

.interchange-button-primary:hover {
    border-color: #f07a58;
    background: #f07a58;
}

.interchange-button-secondary {
    background: rgba(255, 255, 255, 0.035);
    color: var(--interchange-text) !important;
}

.interchange-button-secondary:hover {
    border-color: rgba(255, 255, 255, 0.24);
    background: rgba(255, 255, 255, 0.07);
}

.interchange-check-note {
    max-width: 68ch;
    margin: 0.9rem 0 0;
    font-size: 0.77rem;
}

.interchange-visual {
    position: relative;
    min-width: 0;
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--interchange-border);
    border-radius: 0.9rem;
    background: #09101d;
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.32);
}

.interchange-visual::after {
    position: absolute;
    inset: 0;
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: inherit;
    pointer-events: none;
    content: "";
}

.interchange-visual img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 1200 / 630;
    object-fit: cover;
}

.interchange-visual figcaption {
    position: absolute;
    right: 0.75rem;
    bottom: 0.75rem;
    left: 0.75rem;
    padding: 0.65rem 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 0.55rem;
    background: rgba(7, 13, 25, 0.78);
    color: #cbd5e1;
    font-family: "JetBrains Mono", ui-monospace, monospace;
    font-size: 0.7rem;
    text-align: center;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.interchange-local-nav {
    display: flex;
    margin: 0 0 1rem;
    padding: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.35rem;
    border: 1px solid var(--interchange-border);
    border-radius: 0.8rem;
    background: rgba(17, 26, 46, 0.76);
}

.interchange-local-nav a {
    display: inline-flex;
    min-height: 2.75rem;
    padding: 0.6rem 0.72rem;
    align-items: center;
    border-radius: 0.5rem;
    color: var(--interchange-muted);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
}

.interchange-local-nav a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
}

.interchange-section {
    padding: clamp(3.75rem, 8vw, 6rem) 0;
    scroll-margin-top: 5rem;
}

.interchange-section + .interchange-section {
    border-top: 1px solid var(--interchange-border);
}

.interchange-section-heading {
    max-width: 780px;
    margin-bottom: 1.8rem;
}

.interchange-section-heading > p:last-child {
    max-width: 65ch;
    margin: 0;
    font-size: 1rem;
}

.interchange-status-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.9rem;
}

.interchange-card {
    min-width: 0;
    padding: 1.25rem;
    border: 1px solid var(--interchange-border);
    border-radius: 0.8rem;
    background: linear-gradient(160deg, rgba(22, 32, 56, 0.88), rgba(13, 20, 37, 0.95));
}

.interchange-card p {
    margin: 0;
    font-size: 0.9rem;
}

.interchange-pill {
    display: inline-flex;
    min-height: 1.9rem;
    padding: 0.32rem 0.55rem;
    align-items: center;
    border: 1px solid var(--interchange-border);
    border-radius: 0.5rem;
    font-family: "JetBrains Mono", ui-monospace, monospace;
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.interchange-pill.is-live {
    border-color: rgba(74, 222, 128, 0.4);
    background: rgba(74, 222, 128, 0.1);
    color: #86efac;
}

.interchange-pill.is-paused,
.interchange-pill.is-gated {
    border-color: rgba(245, 182, 66, 0.4);
    background: rgba(245, 182, 66, 0.1);
    color: #f7ce71;
}

.interchange-pill.is-off {
    border-color: rgba(148, 163, 184, 0.35);
    background: rgba(148, 163, 184, 0.08);
    color: #cbd5e1;
}

.interchange-pill.is-pending {
    border-color: rgba(53, 198, 223, 0.4);
    background: rgba(53, 198, 223, 0.09);
    color: #8be3f1;
}

.interchange-section-split {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: clamp(2rem, 6vw, 5rem);
}

.interchange-principles {
    display: grid;
    gap: 0.85rem;
}

.interchange-principles article {
    display: grid;
    padding: 1rem 0;
    grid-template-columns: 2.5rem minmax(0, 1fr);
    gap: 0.85rem;
    border-bottom: 1px solid var(--interchange-border);
}

.interchange-principles article > span {
    color: #f59a7d;
    font-family: "JetBrains Mono", ui-monospace, monospace;
    font-size: 0.8rem;
}

.interchange-principles h3,
.interchange-principles p {
    margin-top: 0;
}

.interchange-principles p {
    margin-bottom: 0;
}

.interchange-flow {
    display: grid;
    margin: 0;
    padding: 0;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.75rem;
    list-style: none;
    counter-reset: interchange-step;
}

.interchange-flow li {
    min-width: 0;
    padding: 1.15rem;
    border: 1px solid var(--interchange-border);
    border-radius: 0.75rem;
    background: rgba(17, 26, 46, 0.68);
    counter-increment: interchange-step;
}

.interchange-flow li::before {
    display: block;
    margin-bottom: 2rem;
    color: #f59a7d;
    font-family: "JetBrains Mono", ui-monospace, monospace;
    font-size: 0.72rem;
    content: "0" counter(interchange-step);
}

.interchange-flow span {
    font-family: "Space Grotesk", "Inter", sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
}

.interchange-flow p {
    margin-bottom: 0;
    font-size: 0.86rem;
}

.interchange-link-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem;
}

.interchange-link-grid > a {
    display: grid;
    min-width: 0;
    min-height: 8.5rem;
    padding: 1.1rem;
    align-content: center;
    gap: 0.45rem;
    border: 1px solid var(--interchange-border);
    border-radius: 0.75rem;
    background: rgba(17, 26, 46, 0.68);
    color: var(--interchange-text);
    text-decoration: none;
}

.interchange-link-grid > a:hover {
    border-color: rgba(232, 97, 58, 0.52);
    background: rgba(22, 32, 56, 0.9);
}

.interchange-link-grid span {
    color: #f59a7d;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.interchange-link-grid strong {
    font-family: "Space Grotesk", "Inter", sans-serif;
    font-size: 1.12rem;
}

.interchange-link-grid code {
    overflow-wrap: anywhere;
    color: var(--interchange-muted);
    font: 0.72rem/1.5 "JetBrains Mono", ui-monospace, monospace;
}

.interchange-launch {
    display: flex;
    margin-bottom: 5rem;
    padding: clamp(1.5rem, 4vw, 2.5rem);
    align-items: flex-end;
    justify-content: space-between;
    gap: 2rem;
    border: 1px solid rgba(232, 97, 58, 0.38) !important;
    border-radius: 0.9rem;
    background:
        linear-gradient(120deg, rgba(232, 97, 58, 0.12), transparent 50%),
        rgba(17, 26, 46, 0.84);
}

.interchange-launch h2 {
    max-width: 24ch;
}

.interchange-launch > div:first-child {
    max-width: 720px;
}

.interchange-launch .interchange-actions {
    flex: 0 0 auto;
}

.interchange-footer {
    display: flex;
    width: min(1200px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 2.5rem 0 3.5rem;
    align-items: flex-start;
    justify-content: space-between;
    gap: 2rem;
    border-top: 1px solid var(--interchange-border);
    color: var(--interchange-muted);
    font-size: 0.84rem;
}

.interchange-footer strong {
    color: var(--interchange-text);
    font-size: 1rem;
}

.interchange-footer p {
    max-width: 52ch;
    margin: 0.45rem 0 0;
    line-height: 1.6;
}

.interchange-footer > div:last-child {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem 1.2rem;
}

.interchange-footer a {
    min-height: 2.75rem;
    align-items: center;
    color: var(--interchange-muted);
    text-decoration: none;
}

.interchange-footer a:hover {
    color: #fff;
}

.interchange-button:focus-visible,
.interchange-local-nav a:focus-visible,
.interchange-link-grid > a:focus-visible,
.interchange-footer a:focus-visible {
    outline: 3px solid var(--interchange-focus);
    outline-offset: 3px;
}

@media (max-width: 900px) {
    .interchange-hero,
    .interchange-section-split {
        grid-template-columns: 1fr;
    }

    .interchange-hero {
        min-height: 0;
        padding-top: 3.75rem;
    }

    .interchange-visual {
        order: -1;
    }

    .interchange-status-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .interchange-flow {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .interchange-launch {
        align-items: flex-start;
        flex-direction: column;
    }

    .interchange-launch .interchange-actions {
        width: 100%;
    }
}

@media (max-width: 600px) {
    .interchange-main h1 {
        font-size: 2.6rem;
        line-height: 1.03;
    }

    .interchange-main h2 {
        font-size: 2rem;
    }

    .interchange-main,
    .interchange-footer {
        width: min(100% - 1.25rem, 1200px);
    }

    .interchange-status-grid,
    .interchange-flow,
    .interchange-link-grid {
        grid-template-columns: 1fr;
    }

    .interchange-actions,
    .interchange-actions .interchange-button {
        width: 100%;
    }

    .interchange-local-nav a {
        width: 100%;
    }

    .interchange-footer {
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

/* Receipt verifier */
.interchange-verifier {
    width: min(1100px, calc(100% - 2rem));
    min-height: calc(100vh - 4rem);
    margin: 0 auto;
    padding: clamp(2.5rem, 7vw, 5.5rem) 0;
}

.interchange-backlink {
    display: inline-flex;
    min-height: 2.75rem;
    margin-bottom: 1.5rem;
    align-items: center;
    color: var(--interchange-muted);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
}

.interchange-backlink:hover {
    color: #fff;
}

.interchange-verifier-grid {
    display: grid;
    align-items: start;
    grid-template-columns: minmax(0, 0.82fr) minmax(360px, 1.18fr);
    gap: clamp(2rem, 6vw, 5rem);
}

.interchange-verifier h1,
.interchange-verifier h2 {
    font-family: "Space Grotesk", "Inter", ui-sans-serif, sans-serif;
    letter-spacing: -0.035em;
}

.interchange-verifier h1 {
    max-width: 12ch;
    margin: 0.7rem 0 1rem;
    color: var(--interchange-text);
    font-size: 3.2rem;
    line-height: 1;
}

.interchange-verifier h2 {
    color: var(--interchange-text);
    font-size: 1.8rem;
}

.interchange-verifier p {
    color: var(--interchange-muted);
    line-height: 1.65;
}

.interchange-verifier code,
.interchange-verifier pre,
.interchange-verifier textarea,
.interchange-field-hint {
    font-family: "JetBrains Mono", ui-monospace, monospace;
}

.interchange-verifier code {
    color: #a8e7f2;
}

.interchange-verifier-lede {
    max-width: 58ch;
    font-size: 1.02rem;
}

.interchange-verifier-note {
    margin-top: 1.5rem;
    padding: 1rem;
    border-left: 3px solid var(--interchange-accent);
    border-radius: 0 0.65rem 0.65rem 0;
    background: rgba(232, 97, 58, 0.08);
}

.interchange-verifier-note strong {
    color: var(--interchange-text);
}

.interchange-verifier-note p {
    margin-bottom: 0;
    font-size: 0.86rem;
}

.interchange-verifier-panel {
    min-width: 0;
    padding: clamp(1rem, 3vw, 1.5rem);
    border: 1px solid var(--interchange-border);
    border-radius: 0.85rem;
    background: linear-gradient(160deg, rgba(22, 32, 56, 0.9), rgba(13, 20, 37, 0.97));
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.24);
}

.interchange-field + .interchange-field {
    margin-top: 1.1rem;
}

.interchange-field label {
    display: block;
    margin-bottom: 0.35rem;
    color: var(--interchange-text);
    font-size: 0.9rem;
    font-weight: 600;
}

.interchange-field-hint {
    display: block;
    margin-bottom: 0.55rem;
    color: #aab8cc;
    font-size: 0.72rem;
    line-height: 1.5;
}

.interchange-field input,
.interchange-field textarea {
    width: 100%;
    min-height: 3rem;
    padding: 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 0.6rem;
    background: #0a1120;
    color: var(--interchange-text);
    font: 0.86rem/1.5 "Inter", ui-sans-serif, sans-serif;
}

.interchange-field textarea {
    min-height: 11rem;
    resize: vertical;
    font-family: "JetBrains Mono", ui-monospace, monospace;
    font-size: 0.75rem;
}

.interchange-field input:focus,
.interchange-field textarea:focus {
    border-color: var(--interchange-focus);
    outline: 3px solid rgba(142, 223, 241, 0.22);
    outline-offset: 2px;
}

.interchange-verify-button {
    width: 100%;
    min-height: 3rem;
    margin-top: 1.15rem;
    padding: 0.72rem 1rem;
    border: 1px solid var(--interchange-accent);
    border-radius: 0.65rem;
    background: var(--interchange-accent);
    color: #0c1222;
    font: 700 0.9rem/1.3 "Inter", ui-sans-serif, sans-serif;
    cursor: pointer;
}

.interchange-verify-button:hover:not(:disabled) {
    border-color: #f07a58;
    background: #f07a58;
}

.interchange-verify-button:disabled {
    cursor: wait;
    opacity: 0.72;
}

.interchange-verify-button:focus-visible,
.interchange-backlink:focus-visible {
    outline: 3px solid var(--interchange-focus);
    outline-offset: 3px;
}

.interchange-verifier-result {
    max-height: 26rem;
    margin: 1rem 0 0;
    padding: 1rem;
    overflow: auto;
    border: 1px solid var(--interchange-border);
    border-radius: 0.65rem;
    background: #08101d;
    color: var(--interchange-text);
    font-size: 0.73rem;
    line-height: 1.6;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.interchange-verifier-result[data-state="ok"] {
    border-color: rgba(74, 222, 128, 0.5);
    color: #a7f3d0;
}

.interchange-verifier-result[data-state="bad"] {
    border-color: rgba(248, 113, 113, 0.5);
    color: #fecaca;
}

.interchange-verifier-links {
    margin-top: clamp(3rem, 8vw, 6rem);
    padding-top: 2.5rem;
    border-top: 1px solid var(--interchange-border);
}

.interchange-verifier-boundary {
    max-width: 76ch;
    margin-top: 1.2rem;
    font-size: 0.82rem;
}

@media (max-width: 800px) {
    .interchange-verifier-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .interchange-verifier {
        width: min(100% - 1.25rem, 1100px);
    }

    .interchange-verifier h1 {
        font-size: 2.45rem;
    }
}