:root {
    --primary-color: #4a90e2;
    --bg-color: #f5f7fa;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
}

.container {
    max-width: 450px;
    width: 100%;
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    overflow: hidden;
    padding-bottom: 20px;
}

.poster-banner {
    width: 100%;
    height: 220px;
    background-size: cover;
    background-position: center;
    position: relative;
    background-color: #ddd;
}

.poster-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
}

.content {
    padding: 20px;
}

.school-title {
    color: #333;
    margin: 0 0 5px 0;
    font-size: 24px;
}

.event-box {
    background: #f0f7ff;
    border-left: 4px solid var(--primary-color);
    padding: 12px;
    margin-bottom: 20px;
    border-radius: 0 8px 8px 0;
}

.event-box h3 {
    margin: 0 0 5px 0;
    color: var(--primary-color);
}

.event-box p {
    margin: 3px 0;
    font-size: 14px;
    color: #666;
}

.event-options {
    margin-top: 10px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.opt-badge {
    font-size: 11px;
    padding: 4px 8px;
    border-radius: 4px;
    background: #e1e1e1;
    color: #333;
    font-weight: bold;
}

.opt-badge.active {
    background: #27ae60;
    color: white;
}

.countdown-box {
    background: #fff3cd;
    color: #856404;
    padding: 12px;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    margin-bottom: 20px;
    font-size: 15px;
}

.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    color: #444;
}

input, select {
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 15px;
}

.btn-submit {
    width: 100%;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 12px;
    font-size: 16px;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-submit:disabled {
    background: #ccc;
    cursor: not-allowed;
}