.concept-site {
    --bg: #050705;
    --surface: #0c110d;
    --text: #f5f7f4;
    --muted: #b3bcb1;
    --border: #2b382b;
    --green: #65ed49;
    --pink: #ff6da2;
    background: var(--bg);
}

.concept-site .skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    z-index: 100;
    padding: 12px 20px;
    background: var(--green);
    color: #050705;
}

.concept-site .skip-link:focus { top: 12px; }
.concept-site :focus-visible { outline: 3px solid var(--pink); outline-offset: 5px; }
.concept-site .site-header { background: #050705; }
.concept-site .nav { flex-wrap: wrap; gap: 16px 30px; padding-block: 18px; }
.concept-site .nav-links { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.concept-site .nav-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--muted); background: none; border: 0; cursor: pointer; }
.concept-site .nav-link:hover,
.concept-site .nav-link[aria-current="page"] { color: var(--green); }
.concept-site .brand { color: var(--text); }
.concept-site .brand-logo { width: 34px; height: 34px; }
.concept-site .site-footer { padding: 36px 0; border-top: 1px solid var(--border); }
.concept-site .footer-layout { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; }
.concept-site .footer-links { display: flex; flex-wrap: wrap; gap: 10px 24px; }
.concept-site .footer-links a,
.concept-site .footer-links button { display: inline-flex; align-items: center; min-height: 44px; color: var(--muted); background: none; border: 0; font-size: inherit; cursor: pointer; }
.concept-site .footer-links a:hover,
.concept-site .footer-links button:hover { color: var(--green); }
.concept-site .button { min-height: 48px; border-radius: 8px; padding: 12px 22px; cursor: pointer; }
.concept-site .button-primary { background: var(--green); color: #050705; border: 1px solid var(--green); }
.concept-site .button-primary:hover { background: #8bff71; color: #050705; }
.concept-site .button-secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.concept-site .button-secondary:hover { border-color: var(--green); }
.concept-site .pink { color: var(--pink); }
.concept-site .section-label { color: var(--green); }
.concept-site .hero-buttons { flex-wrap: wrap; gap: 12px; }
.concept-site code { overflow-wrap: anywhere; }
.concept-site .contact-modal { transition: opacity 0.2s ease; }

.concept-site .concept-hero,
.concept-site .api-hero { padding: 58px 0 76px; border-bottom: 1px solid var(--border); }
.concept-site .concept-hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 28px; }
.concept-site .hero-tree { width: 100%; max-width: 650px; height: auto; display: block; }
.concept-site .concept-hero-copy { min-width: 0; }
.concept-site .concept-hero h1,
.concept-site .api-hero h1 { font-size: clamp(38px, 4.6vw, 66px); line-height: 1.04; letter-spacing: -0.04em; margin: 18px 0 24px; }
.concept-site .concept-hero h1 span { color: var(--green); }
.concept-site .concept-hero .hero-subtitle { font-size: clamp(20px, 2vw, 27px); color: var(--text); margin-bottom: 18px; }
.concept-site .concept-hero .hero-text { color: var(--muted); max-width: 48ch; font-size: 17px; margin-bottom: 26px; }
.concept-site .concept-section { padding: 84px 0; border-bottom: 1px solid var(--border); }
.concept-site .concept-section h2,
.concept-site .about-main h1 { font-size: clamp(32px, 4vw, 52px); line-height: 1.12; letter-spacing: -0.035em; margin: 12px 0 24px; }
.concept-site .concept-section .intro { max-width: 760px; color: var(--muted); margin-bottom: 24px; font-size: 18px; }
.concept-site .section-heading { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 12px 28px; margin-bottom: 30px; }
.concept-site .section-heading h2 { margin-bottom: 0; }
.concept-site .text-link { color: var(--pink); text-decoration: underline; text-underline-offset: 4px; }
.concept-site .concept-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.concept-site .concept-card { padding: 28px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); min-width: 0; }
.concept-site .concept-card .card-number { color: var(--green); font-size: 13px; font-weight: 700; letter-spacing: 0.08em; }
.concept-site .concept-card h3 { font-size: 23px; margin: 16px 0 12px; }
.concept-site .concept-card p { color: var(--muted); margin-bottom: 18px; }
.concept-site .concept-card a { color: var(--pink); text-decoration: underline; text-underline-offset: 4px; }
.concept-site .trust-note { margin-top: 24px; color: var(--muted); font-size: 15px; max-width: 85ch; }
.concept-site .delegate-layout { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 48px; align-items: start; }
.concept-site .delegate-copy p { color: var(--muted); margin-bottom: 20px; }
.concept-site .delegate-copy .delegate-subtitle { color: var(--text); font-size: 20px; }
.concept-site .learn-details { border: 1px solid var(--border); border-radius: 8px; padding: 16px 20px; margin: 20px 0; }
.concept-site .learn-details summary { color: var(--green); cursor: pointer; font-weight: 700; min-height: 44px; padding-block: 8px; }
.concept-site .learn-details p { margin: 16px 0 0; color: var(--muted); }
.concept-site .verification-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.concept-site .explorer-link { display: block; margin-top: 14px; font-size: 14px; }
.concept-site .addresses { display: grid; grid-template-columns: 1fr; gap: 16px; margin-top: 0; }
.concept-site .address-card { min-width: 0; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 24px; }
.concept-site .address-label { color: var(--green); margin-bottom: 12px; font-size: 13px; }
.concept-site .address-card code { display: block; font-size: 15px; color: var(--text); margin-bottom: 14px; }
.concept-site .address-card button { min-height: 44px; color: var(--pink); background: transparent; border: 1px solid var(--border); border-radius: 6px; padding: 8px 14px; cursor: pointer; }
.concept-site .address-card button:hover { border-color: var(--pink); }
.concept-site .copy-status { display: block; min-height: 24px; font-size: 14px; color: var(--muted); margin-top: 8px; }
.concept-site .contact-layout { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 28px; }
.concept-site .contact-layout h2 { margin-bottom: 16px; }
.concept-site .contact-layout p { color: var(--muted); max-width: 60ch; }
.concept-site .final-cta { text-align: center; padding: 76px 0; background: #0a100a; }
.concept-site .final-cta h2 { font-size: clamp(32px, 4vw, 52px); line-height: 1.12; margin-bottom: 24px; }
.concept-site .final-cta h2 span { color: var(--green); }
.concept-site .final-cta .hero-buttons { justify-content: center; }
.concept-site section[id] { scroll-margin-top: 28px; }

.concept-site .about-main { padding: 64px 0 84px; }
.concept-site .about-lead { font-size: 21px; color: var(--muted); max-width: 65ch; }
.concept-site .about-section { padding-top: 44px; margin-top: 44px; border-top: 1px solid var(--border); }
.concept-site .about-section h2 { color: var(--green); font-size: 28px; margin-bottom: 18px; line-height: 1.2; }
.concept-site .about-section h3 { font-size: 21px; margin: 24px 0 10px; }
.concept-site .about-section p { color: var(--muted); margin-bottom: 18px; }
.concept-site .about-section a { color: var(--pink); text-decoration: underline; text-underline-offset: 4px; }
.concept-site .about-section ul { padding-left: 22px; color: var(--muted); }
.concept-site .about-section li { margin: 10px 0; }
.concept-site .about-section .button { color: #050705; text-decoration: none; }
.concept-site .about-section .concept-card h3 { margin-top: 12px; }
.concept-site .about-section .concept-card p { margin-bottom: 12px; }
.concept-site .about-section .trust-note { font-size: 14px; }
.concept-site .about-section .verification-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.concept-site .comparison-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.concept-site .next-steps { display: flex; flex-wrap: wrap; gap: 16px 24px; }
.concept-site .next-steps a { min-height: 44px; display: inline-flex; align-items: center; }

.concept-site .api-endpoints { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 30px; background: transparent; border: 0; }
.concept-site .api-endpoint { display: block; }
.concept-site .api-endpoint-header { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 16px; }
.concept-site .api-endpoint-header span { color: var(--muted); font-size: 13px; }
.concept-site .api-endpoint-header strong { color: var(--green); font-size: 16px; letter-spacing: normal; text-transform: none; }
.concept-site .api-endpoint code,
.concept-site .api-data-note code,
.concept-site .api-response pre { display: block; color: var(--text); font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; font-size: 14px; background: var(--surface-2); padding: 12px; border-radius: 6px; }
.concept-site .api-endpoint code { margin-bottom: 12px; }
.concept-site .api-info-cards { gap: 20px; }
.concept-site .api-data-note { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 28px; }
.concept-site .api-data-note p { color: var(--muted); margin-bottom: 18px; }
.concept-site .api-response { margin-top: 24px; }
.concept-site .api-response pre { margin-top: 12px; overflow-x: auto; line-height: 1.6; }
.concept-site .api-docs .api-doc-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

@media (max-width: 800px) {
    .concept-site .concept-hero,
    .concept-site .api-hero { padding-top: 24px; }
    .concept-site .concept-hero-grid { grid-template-columns: 1fr; gap: 12px; }
    .concept-site .hero-tree { max-width: 400px; margin-inline: auto; }
    .concept-site .concept-hero-copy { max-width: 640px; }
    .concept-site .concept-cards,
    .concept-site .api-endpoints,
    .concept-site .verification-grid,
    .concept-site .about-section .verification-grid,
    .concept-site .comparison-grid { grid-template-columns: 1fr; }
    .concept-site .delegate-layout { grid-template-columns: 1fr; gap: 28px; }
    .concept-site .concept-section { padding-block: 56px; }
}

@media (max-width: 480px) {
    .concept-site .container { width: calc(100% - 32px); }
    .concept-site .nav { gap: 10px; }
    .concept-site .nav-links { gap: 4px 18px; width: 100%; }
    .concept-site .nav-link { font-size: 12px; }
    .concept-site .hero-tree { max-width: 300px; }
    .concept-site .concept-hero h1 { font-size: 38px; }
    .concept-site .concept-card,
    .concept-site .api-data-note,
    .concept-site .address-card { padding: 20px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .concept-site *, .concept-site *::before, .concept-site *::after { animation: none !important; transition: none !important; }
}