:root {
    --bg-color: #070707;
    --text-main: #ffffff;
    --text-accent: #cc0000;
    --text-sub: #ffffff;
    --border-color: #070707;
    --selection-bg: #cc0000;
    --selection-text: #ffffff;
}

.theme-red {
    --bg-color: #cc0000;
    --text-main: #ffffff;
    --text-accent: #070707;
    --text-sub: #070707;
    --border-color: #070707;
    --selection-bg: #ffffff;
    --selection-text: #cc0000;
}

html {
    background-color: var(--bg-color);
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    min-height: 100vh;
}

::selection {
    background-color: var(--selection-bg);
    color: var(--selection-text);
}

.theme-main {
    color: var(--text-main);
}

.theme-accent {
    color: var(--text-accent);
}

.theme-sub {
    color: var(--text-sub);
}

.theme-border {
    border-color: var(--border-color);
}

.theme-accent-bg {
    background-color: var(--text-accent);
}

.theme-main-bg {
    background-color: var(--text-main);
}

.theme-hover-main:hover,
.theme-hover-main:focus-visible {
    color: var(--text-main);
}

.theme-hover-accent:hover,
.theme-hover-accent:focus-visible {
    color: var(--text-accent);
}

.society-wordmark {
    color: var(--text-accent);
    font-size: clamp(1.15rem, 2vw, 1.7rem);
    font-weight: 900;
    letter-spacing: 0.42em;
    line-height: 1;
    text-transform: uppercase;
}

.society-footer {
    width: 100%;
    text-align: center;
}

.society-footer__inner {
    max-width: 64rem;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    border-top: 4px solid var(--border-color);
    padding-top: 1.5rem;
}

.society-footer__disclaimer {
    max-width: 56rem;
    font-size: clamp(0.9rem, 1.4vw, 1.05rem);
    font-weight: 700;
    line-height: 1.7;
    margin: 0 0 1.2rem;
}

.society-footer__label {
    color: var(--text-accent);
    font-weight: 900;
    letter-spacing: 0.24em;
    margin-right: 0.5rem;
    text-transform: uppercase;
}

.society-footer__mark {
    color: var(--text-accent);
    font-size: clamp(0.7rem, 1vw, 0.9rem);
    font-weight: 900;
    letter-spacing: 0.32em;
    line-height: 1.5;
    margin: 0;
    text-transform: uppercase;
}

.society-panel {
    border: 4px solid var(--border-color);
}

/* ── Unified Sponsor Node card ──────────────────────────────────── */
/* Matches the app-node card style: filled rectangle, theme-aware    */
.sponsor-node {
    border: 4px solid var(--border-color);
    background: var(--border-color);
    color: var(--text-main);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    transition: background-color 180ms ease, color 180ms ease, border-color 1s;
}

.sponsor-node:hover {
    background: var(--text-main);
    color: var(--border-color);
}

.sponsor-node__label {
    font-size: 0.65rem;
    font-weight: 900;
    letter-spacing: 0.34em;
    text-transform: uppercase;
    color: var(--text-accent);
    margin-bottom: 0.85rem;
    transition: color 1s;
}

.sponsor-node__brand {
    font-size: clamp(1.05rem, 1.8vw, 1.4rem);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1.1;
    margin-bottom: 0.75rem;
    flex-grow: 1;
    transition: color 180ms ease;
}

.sponsor-node__message {
    font-size: clamp(0.88rem, 1.3vw, 1rem);
    font-weight: 500;
    line-height: 1.6;
    opacity: 0.88;
    margin-bottom: 1.25rem;
    transition: opacity 180ms ease;
}

.sponsor-node__cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    border-top: 2px solid color-mix(in srgb, currentColor 22%, transparent);
    padding-top: 1rem;
    margin-top: auto;
    transition: border-color 180ms ease;
}

/* Interstitial: full-width version for between articles */
.sponsor-node--interstitial {
    border-left: none;
    border-right: none;
    padding: 2.5rem 2rem;
}

.society-arrow {
    transition: transform 180ms ease;
}

.group:hover .society-arrow,
.group:focus-visible .society-arrow {
    transform: translateX(0.7rem);
}

@media (max-width: 640px) {
    .society-wordmark {
        letter-spacing: 0.28em;
    }

    .society-footer__inner {
        padding-top: 1.25rem;
    }

    .society-footer__label,
    .society-footer__mark {
        letter-spacing: 0.2em;
    }
}