/* 抽奖系统样式 */
body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.container {
    max-width: 1000px;
}

header h1 {
    color: #dc3545;
    font-weight: bold;
}

.card {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border: none;
}

.card-header {
    background-color: #fff;
    border-bottom: none;
}

.nav-tabs .nav-link {
    color: #6c757d;
    font-weight: 500;
}

.nav-tabs .nav-link.active {
    color: #dc3545;
    font-weight: 600;
}

.btn-primary {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
}

.form-control:focus, .form-select:focus {
    border-color: #86b7fe;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.form-check-input:checked {
    background-color: #dc3545;
    border-color: #dc3545;
}

.winner-badge {
    background-color: #28a745;
    color: white;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: bold;
}

.pending-badge {
    background-color: #ffc107;
    color: #212529;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: bold;
}

.lottery-item {
    transition: transform 0.2s;
}

.lottery-item:hover {
    transform: translateY(-5px);
}

.bg-dark {
    background-color: #343a40 !important;
}

.navbar-brand {
    font-weight: bold;
}

/* 卡片式选项按钮 */
.option-card {
    border-radius: 15px;
    border: none;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.option-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
}

/* 抽奖项目卡片 */
.lottery-card {
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 25px;
}

.lottery-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.lottery-card .card-title {
    font-weight: 600;
}

.lottery-card .card-img-top {
    height: 160px;
    object-fit: cover;
    background-color: #f0f0f0;
}

.lottery-status {
    position: absolute;
    top: 15px;
    right: 15px;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.status-active {
    background-color: #d1e7dd;
    color: #0f5132;
}

.status-closed {
    background-color: #f8d7da;
    color: #842029;
}

.status-finished {
    background-color: #e2e3e5;
    color: #41464b;
}

/* 公告栏样式 */
.announcement-box {
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    .option-card {
        margin-bottom: 20px;
    }
}