:root {
    color-scheme: light dark;
    --fg: #1f2937;
    --muted: #6b7280;
    --bg: #faf8f3;
    --card-bg: #ffffff;
    --card-border: rgba(15, 23, 42, 0.08);
    --shadow: 0 2px 4px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.06);
    --shadow-hover: 0 4px 8px rgba(15, 23, 42, 0.06), 0 16px 32px rgba(15, 23, 42, 0.10);
    --link: #1d4ed8;
}

@media (prefers-color-scheme: dark) {
    :root {
        --fg: #f1f5f9;
        --muted: #94a3b8;
        --bg: #0f1115;
        --card-bg: #1a1c22;
        --card-border: rgba(255, 255, 255, 0.06);
        --shadow: 0 2px 4px rgba(0,0,0,0.3), 0 8px 24px rgba(0,0,0,0.35);
        --shadow-hover: 0 4px 8px rgba(0,0,0,0.35), 0 16px 32px rgba(0,0,0,0.45);
        --link: #93c5fd;
    }
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    background: var(--bg);
    color: var(--fg);
    margin: 0;
    line-height: 1.55;
    font-size: 17px;
}

main {
    max-width: 64rem;
    margin: 0 auto;
    padding: 4rem 1.5rem 6rem;
}

.intro { max-width: 38rem; margin-bottom: 3.5rem; padding-left: 1.4rem; }

.section-intro {
    max-width: 38rem;
    margin: -0.25rem 0 1.75rem;
    padding-left: 1.4rem;
    color: var(--fg);
    line-height: 1.6;
}

h1 {
    font-size: 2.5rem;
    margin: 0 0 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

h2 {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin: 3rem 0 1.25rem;
    color: var(--muted);
    font-weight: 700;
}

a {
    color: var(--link);
    text-decoration: none;
    font-weight: 500;
}
a:hover { text-decoration: underline; }

.intro p { margin: 0 0 0.6rem; color: var(--fg); }

/* Card grid */
.cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 42rem) {
    .cards { grid-template-columns: repeat(2, 1fr); }
    .card.wide { grid-column: span 2; }
}

@media (min-width: 60rem) {
    .cards { grid-template-columns: repeat(3, 1fr); }
    .card.wide { grid-column: span 3; }
}

/* Card */
.card {
    --accent: #1d4ed8;
    --accent-soft: #dbeafe;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.4s ease-out;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.js .card {
    opacity: 0;
    transform: translateY(16px);
}

.js .card.in-view {
    opacity: 1;
    transform: translateY(0);
}

.js .card.in-view:hover {
    transform: translateY(-3px);
}

.card-header {
    padding: 1rem 1.4rem;
    background: var(--accent);
    color: #ffffff;
    border-bottom: 1px solid rgba(0,0,0,0.08);
}

.card-header h3 {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.005em;
}

.card-header h3 a {
    color: inherit;
    text-decoration: none;
}
.card-header h3 a:hover { text-decoration: underline; }

.card-body {
    padding: 1.25rem 1.4rem 1.4rem;
}

.card p {
    margin: 0;
    color: var(--fg);
    font-size: 0.95rem;
    line-height: 1.55;
}

.card ul.versions {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.5rem;
}

@media (min-width: 32rem) {
    .card ul.versions { grid-template-columns: repeat(2, 1fr); }
}

.card ul.versions li {
    margin: 0;
    padding: 0.6rem 0.85rem;
    background: var(--accent-soft);
    border-radius: 8px;
    font-size: 0.88rem;
    line-height: 1.45;
}

.card ul.versions a {
    color: var(--accent);
    font-weight: 600;
}

@media (prefers-color-scheme: dark) {
    .card ul.versions li {
        background: rgba(255, 255, 255, 0.05);
    }
}

/* Card screen (iframe preview at bottom) */
.card-screen {
    position: relative;
    height: 280px;
    background: #000;
    border-top: 1px solid var(--card-border);
    overflow: hidden;
    margin-top: auto;
}

.card-screen iframe {
    position: absolute;
    inset: 0;
    width: 400%;
    height: 400%;
    border: 0;
    transform: scale(0.25);
    transform-origin: top left;
    pointer-events: none;
    background: #fff;
}

.card-screen.placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 0.05em;
}

/* Memi videos banner — one clip at a time, auto-advances */
.card-screen.videos-banner {
    background: #000;
    padding: 0;
    height: 520px;
    position: relative;
    overflow: hidden;
}

/* On wider screens, put memi text and banner side by side */
@media (min-width: 56rem) {
    .card.memi {
        display: grid;
        grid-template-columns: 45% 55%;
        grid-template-rows: auto 1fr;
    }
    .card.memi .card-header {
        grid-column: 1 / -1;
    }
    .card.memi .card-body {
        grid-column: 1;
        grid-row: 2;
        border-right: 1px solid var(--card-border);
    }
    .card.memi .card-screen.videos-banner {
        grid-column: 2;
        grid-row: 2;
        height: 600px;
        min-height: 0;
        margin-top: 0;
    }
    /* Stack the version chips in one column inside the narrow body */
    .card.memi ul.versions {
        grid-template-columns: 1fr;
    }
}

.videos-track {
    display: flex;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.video-tile {
    flex: 0 0 100%;
    height: 100%;
    position: relative;
    background: #000;
}

.video-tile video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.video-tile .video-label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    background: rgba(0, 0, 0, 0.7);
    color: #ffffff;
    padding: 0.25rem 0.7rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    backdrop-filter: blur(2px);
}

.banner-dots {
    position: absolute;
    bottom: 0.9rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.5rem;
    z-index: 2;
}

.banner-dots .dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    border: 0;
    padding: 0;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.banner-dots .dot:hover { background: rgba(255, 255, 255, 0.7); }
.banner-dots .dot.active {
    background: #ffffff;
    transform: scale(1.2);
}

/* Memi animated banner — looping demo of the game mechanic */
.card-screen.banner-memi {
    background: #f7f6f1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}
@media (prefers-color-scheme: dark) {
    .card-screen.banner-memi { background: #15171c; }
}
.memi-mock {
    background: #ffffff;
    border-radius: 12px;
    padding: 1rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    text-align: center;
    width: 220px;
}
@media (prefers-color-scheme: dark) {
    .memi-mock { background: #1f2128; box-shadow: 0 4px 16px rgba(0,0,0,0.5); }
}
.memi-mock .image {
    width: 100%;
    aspect-ratio: 4 / 3;
    background-color: #e7e5e4;
    background-size: cover;
    background-position: center;
    border-radius: 8px;
    transition: opacity 0.4s ease;
}
.memi-mock .label {
    margin-top: 0.55rem;
    height: 1.4rem;
    position: relative;
}
.memi-mock .tag {
    position: absolute;
    inset: 0;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 500;
    transition: opacity 0.3s ease;
}
.memi-mock .name {
    position: absolute;
    inset: 0;
    color: #16a34a;
    font-weight: 700;
    font-size: 0.95rem;
    opacity: 0;
    transition: opacity 0.4s ease;
}
.banner-memi.revealed .tag  { opacity: 0; }
.banner-memi.revealed .name { opacity: 1; }
.banner-memi.fading   .memi-mock { opacity: 0; transition: opacity 0.25s ease; }

@media (prefers-color-scheme: dark) {
    .card-screen.placeholder {
        background: rgba(255, 255, 255, 0.03);
    }
}

/* Per-game accents */
.card.memi      { --accent: #16a34a; --accent-soft: #dcfce7; }
.card.penguin   { --accent: #0284c7; --accent-soft: #e0f2fe; }
.card.vinte     { --accent: #9333ea; --accent-soft: #f3e8ff; }
.card.bedlam    { --accent: #ea580c; --accent-soft: #ffedd5; }
.card.bongard   { --accent: #db2777; --accent-soft: #fce7f3; }
.card.robots    { --accent: #0d9488; --accent-soft: #ccfbf1; }
.card.boardgame { --accent: #d97706; --accent-soft: #fef3c7; }
.card.cardgame  { --accent: #b91c1c; --accent-soft: #fee2e2; }
.card.houserule { --accent: #65a30d; --accent-soft: #ecfccb; }

/* Game box image fills the card-screen */
.card-screen.game-image {
    background: var(--accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-screen.game-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}