body {
    background-color: #000;
    margin: 20px;
    padding: 20px;
    line-height: 1.6;
    font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
}
.all_card {
    background: rgba(255, 255, 255, 0.03);
    color: #c9d1d9;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 35px;
    border-radius: 16px;
    border: 1px solid #2d333b;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(2px);
}
h1 {
    color: #f0f6fc;
    font-weight: 600;
    letter-spacing: 1px;
}
h2 {
    color: #8b949e;
    font-weight: 600;
    font-size: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin: 0 0 12px 0;
    padding-top: 12px;
    border-top: 1px solid #30363d;
    border-bottom: none;
}
.gradient-text {
    background: linear-gradient(90deg, #00d2ff, #3a7bd5);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}
.notice_card p,
.past_events_card p,
.join_card p {
    color: #8b949e;
    margin: 8px 0;
}
.join_card p:last-of-type {
    color: #58a6ff;
    font-weight: 600;
    font-size: 1.2rem;
}
footer {
    margin-top: 30px;
    text-align: center;
    color: #484f58;
}