:root {
    --bg: #f2f2f7;
    --card: #ffffff;
    --label: #000000;
    --secondary: #3c3c43a6;
    --separator: #d1d1d6;
    --shadow: rgba(0, 0, 0, 0.06);
    --blue: #007aff;
    --green: #248a3d;
    --purple: #8944ab;
    --orange: #c93400;
    --pill-bg: #e5e5ea;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #000000;
        --card: #1c1c1e;
        --label: #ffffff;
        --secondary: #ebebf599;
        --separator: #38383a;
        --shadow: rgba(0, 0, 0, 0.3);
        --blue: #0a84ff;
        --green: #30d158;
        --purple: #bf5af2;
        --orange: #ff9f0a;
        --pill-bg: #2c2c2e;
    }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    background: var(--bg);
    color: var(--label);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.container { max-width: 1080px; margin: 0 auto; padding: 48px 16px 64px; }

.hero { margin-bottom: 28px; }
.back { display: inline-block; color: var(--blue); text-decoration: none; font-weight: 600; font-size: 15px; margin-bottom: 14px; }
.back:hover { text-decoration: underline; }
.hero h1 { font-size: clamp(30px, 6vw, 40px); font-weight: 700; letter-spacing: -0.6px; line-height: 1.1; }
.hero p { font-size: 17px; line-height: 1.45; color: var(--secondary); margin-top: 8px; max-width: 620px; }

/* Class jump links */
.jump { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 36px; }
.jump a {
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
    padding: 9px 16px;
    border-radius: 999px;
    background: var(--card);
    border: 1px solid var(--separator);
    transition: border-color 0.15s;
}
.jump a:hover { border-color: var(--blue); }

/* Class sections */
.class-section { margin-bottom: 40px; scroll-margin-top: 16px; }
.class-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; padding: 0 4px; }
.class-head h2 { font-size: 24px; font-weight: 700; letter-spacing: -0.3px; }
.class-head a { color: var(--blue); text-decoration: none; font-size: 15px; font-weight: 600; white-space: nowrap; }
.class-head a:hover { text-decoration: underline; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }

.card {
    display: flex;
    flex-direction: column;
    background: var(--card);
    border: 1px solid var(--separator);
    border-radius: 16px;
    padding: 20px;
    text-decoration: none;
    box-shadow: 0 6px 20px var(--shadow);
    transition: transform 0.15s, border-color 0.15s;
}
.card:hover { transform: translateY(-2px); border-color: var(--blue); }
.card:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }

.type {
    align-self: flex-start;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    padding: 3px 9px;
    border-radius: 999px;
    background: var(--pill-bg);
    margin-bottom: 12px;
}
.type-game { color: var(--blue); }
.type-teams { color: var(--green); }
.type-activity { color: var(--purple); }
.type-event { color: var(--orange); }

.card h3 { font-size: 19px; font-weight: 700; letter-spacing: -0.2px; margin-bottom: 6px; }
.card p { color: var(--secondary); line-height: 1.45; font-size: 15px; flex: 1; }
.card .open { margin-top: 14px; color: var(--blue); font-weight: 600; font-size: 15px; }

.empty { color: var(--secondary); padding: 0 4px; }

footer { margin-top: 56px; color: var(--secondary); font-size: 14px; text-align: center; }