body {
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(255, 141, 107, 0.18), transparent 28%),
        radial-gradient(circle at top right, rgba(61, 126, 255, 0.16), transparent 26%),
        linear-gradient(180deg, rgba(255, 248, 239, 0.94), transparent 24%),
        var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.5;
}

.ambient {
    inset: 0;
    pointer-events: none;
    position: fixed;
    z-index: -2;
}

.ambient-aurora {
    background:
        radial-gradient(circle at 12% 18%, rgba(255, 141, 107, 0.18), transparent 24%),
        radial-gradient(circle at 82% 12%, rgba(61, 126, 255, 0.18), transparent 22%),
        radial-gradient(circle at 50% 80%, rgba(255, 216, 92, 0.14), transparent 24%);
    filter: blur(20px);
}

.ambient-grid {
    background-image:
        linear-gradient(rgba(36, 31, 24, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(36, 31, 24, 0.04) 1px, transparent 1px);
    background-size: 32px 32px;
    opacity: 0.28;
    z-index: -1;
}

.app-shell {
    min-height: 100vh;
    padding: var(--space-3);
}

.site-header,
.app-main {
    margin: 0 auto;
    max-width: var(--max-width);
}

.site-header {
    align-items: center;
    display: flex;
    gap: var(--space-3);
    justify-content: space-between;
    margin-bottom: var(--space-4);
    padding: var(--space-3) 0;
}

.brand {
    align-items: center;
    display: inline-flex;
    gap: var(--space-2);
}

.brand span {
    display: grid;
}

.brand strong {
    font-family: var(--font-heading);
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    letter-spacing: 0.03em;
}

.brand small {
    color: var(--text-muted);
    font-size: 0.8rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.brand-mark {
    align-items: center;
    background: linear-gradient(135deg, var(--accent), var(--highlight));
    border-radius: 20px;
    box-shadow: var(--shadow-soft);
    color: #1d140c;
    display: inline-flex;
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    height: 3rem;
    justify-content: center;
    width: 3rem;
}

.site-nav {
    align-items: center;
    backdrop-filter: blur(18px);
    background: var(--surface);
    border: 1px solid var(--stroke);
    border-radius: 999px;
    box-shadow: var(--shadow-soft);
    display: inline-flex;
    gap: var(--space-1);
    padding: 0.35rem;
}

.site-nav a {
    border-radius: 999px;
    color: var(--text-muted);
    font-size: 0.95rem;
    padding: 0.7rem 1rem;
    transition: background var(--transition), color var(--transition);
}

.site-nav a:hover,
.site-nav a.is-active {
    background: var(--accent-soft);
    color: var(--text);
}

.app-main {
    padding-bottom: var(--space-6);
}

.page {
    animation: page-enter 420ms ease both;
    display: grid;
    gap: var(--space-4);
}

.page-shell {
    display: grid;
    gap: var(--space-4);
}

.two-column {
    display: grid;
    gap: var(--space-4);
}

.page-hero {
    align-items: end;
    display: grid;
    gap: var(--space-3);
}

.page-hero h1,
.page-hero h2,
.section-title {
    font-family: var(--font-heading);
    line-height: 1.05;
}

.page-hero h1 {
    font-size: clamp(2.6rem, 6vw, 5.6rem);
    max-width: 10ch;
}

.page-hero p {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 60ch;
}

.hero-grid,
.card-grid,
.history-grid,
.preset-grid,
.game-grid,
.stats-grid,
.step-grid {
    display: grid;
    gap: var(--space-3);
}

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

.section-stack {
    display: grid;
    gap: var(--space-4);
}

.sticky-panel {
    align-self: start;
    position: sticky;
    top: var(--space-4);
}

.noscript {
    color: var(--danger);
    margin: 0 auto;
    max-width: var(--max-width);
    padding: var(--space-4) 0;
}

@keyframes page-enter {
    from {
        opacity: 0;
        transform: translateY(18px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 860px) {
    .site-header {
        align-items: start;
        flex-direction: column;
    }

    .hero-grid,
    .two-column {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 861px) {
    .two-column {
        grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.8fr);
    }

    .card-grid.cols-3,
    .preset-grid,
    .stats-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

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

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

@media (max-width: 540px) {
    .app-shell {
        padding: var(--space-2);
    }

    .site-nav {
        width: 100%;
    }

    .site-nav a {
        flex: 1 1 0;
        text-align: center;
    }
}