:root {
    --bg-start: #1a1c29;
    --bg-end: #0d0e14;
    --card-bg: #21232f;
    --card-border: #363a4a;
    --text-primary: #f2f3f7;
    --text-muted: #8b8fa3;
    --accent: #5b7cfa;
    --accent-hover: #7590ff;
    --live: #2ee6a6;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    padding: 56px 16px 32px;
    background: radial-gradient(circle at top, var(--bg-start), var(--bg-end)) fixed;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    color: var(--text-primary);
}

/* weich schwebende Farbflecken im Hintergrund */
body::before, body::after {
    content: "";
    position: fixed;
    z-index: -1;
    width: 40vmax;
    height: 40vmax;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.18;
    animation: drift 24s ease-in-out infinite alternate;
}
body::before { background: var(--accent); top: -10vmax; left: -10vmax; }
body::after  { background: var(--live); bottom: -15vmax; right: -10vmax; animation-delay: -12s; }

@keyframes drift {
    to { transform: translate(8vmax, 6vmax) scale(1.15); }
}

.app {
    max-width: 960px;
    margin: 0 auto;
}

.hero {
    text-align: center;
    margin-bottom: 48px;
}

.hero h1 {
    margin: 0;
    font-size: clamp(2.4rem, 7vw, 4rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    background: linear-gradient(135deg, var(--accent-hover), var(--live));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero .subtitle {
    margin: 8px 0 0;
    color: var(--text-muted);
    font-size: 1.05rem;
}

.section-title {
    margin: 32px 0 14px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 170px;
    grid-auto-flow: dense;
    gap: 16px;
}

.card.big  { grid-column: span 2; grid-row: span 2; justify-content: flex-end; }
.card.wide { grid-column: span 2; justify-content: flex-end; }
.card:not(.big):not(.wide) { justify-content: flex-end; }

.card.big .icon { width: 64px; height: 64px; font-size: 2.2rem; margin-bottom: auto; }
.card.big h2 { font-size: 1.6rem; }
.card.big p, .card.wide p { font-size: 1rem; }
.card .icon { margin-bottom: auto; }

.card.big {
    background:
        radial-gradient(circle at 80% 15%, rgba(46, 230, 166, 0.22), transparent 55%),
        var(--card-bg);
}
.card.wide {
    background:
        radial-gradient(circle at 85% 20%, rgba(91, 124, 250, 0.25), transparent 55%),
        var(--card-bg);
}

.card-art {
    position: absolute;
    inset: 12px 12px 12px auto;
    height: calc(100% - 24px);
    width: 70%;
    pointer-events: none;
    filter: drop-shadow(0 0 6px rgba(46, 230, 166, 0.5));
    transition: transform 0.4s ease;
}
.card.art:hover .card-art { transform: scale(1.05) rotate(-2deg); }
.card.art h2, .card.art p { position: relative; max-width: 55%; }

@media (max-width: 800px) {
    .grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .grid { grid-template-columns: 1fr; grid-auto-rows: minmax(150px, auto); }
    .card.big, .card.wide { grid-column: auto; grid-row: auto; }
}

.card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    color: inherit;
    text-decoration: none;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
    animation: rise 0.5s ease backwards;
}

.card:nth-child(2) { animation-delay: 0.05s; }
.card:nth-child(3) { animation-delay: 0.1s; }
.card:nth-child(4) { animation-delay: 0.15s; }
.card:nth-child(5) { animation-delay: 0.2s; }
.card:nth-child(6) { animation-delay: 0.25s; }
.card:nth-child(7) { animation-delay: 0.3s; }

@keyframes rise {
    from { opacity: 0; transform: translateY(14px); }
}

.card:hover, .card:focus-visible {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 18px 40px rgba(91, 124, 250, 0.28);
    outline: none;
}

.card .icon {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    margin-bottom: 6px;
    font-size: 1.4rem;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(91, 124, 250, 0.25), rgba(46, 230, 166, 0.2));
}

.card h2 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.card p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.45;
}

.card::after {
    content: "→";
    position: absolute;
    top: 18px;
    right: 20px;
    color: var(--text-muted);
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.card:hover::after, .card:focus-visible::after {
    opacity: 1;
    transform: none;
    color: var(--accent-hover);
}

footer {
    margin-top: 56px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

footer a { color: var(--accent-hover); text-decoration: none; }
footer a:hover { text-decoration: underline; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
}

.card.gol .card-art { filter: drop-shadow(0 0 5px rgba(46, 230, 166, 0.45)); width: 62%; }

.card.wide.art .card-art { width: 45%; }
.card.lorenz .card-art { filter: drop-shadow(0 0 5px rgba(255, 107, 107, 0.5)); }
.card.lorenz { background: radial-gradient(circle at 85% 20%, rgba(255, 107, 107, 0.2), transparent 55%), var(--card-bg); }

.card.big.lorenz .card-art { width: 70%; }