/* 登录注册页面样式 */
body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    padding: 20px;
}

.auth-box {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    max-width: 400px;
    margin: 0 auto;
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo h1 {
    font-size: 24px;
    color: #333;
    margin-bottom: 5px;
}

.logo p {
    font-size: 14px;
    color: #999;
}

.tabs {
    display: flex;
    margin-bottom: 30px;
    border-bottom: 2px solid #f0f0f0;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    background: none;
    border: none;
    font-size: 16px;
    color: #666;
    cursor: pointer;
    position: relative;
    transition: all 0.3s;
}

.tab-btn.active {
    color: #667eea;
    font-weight: bold;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: #667eea;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    box-sizing: border-box;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.tips {
    margin-top: 20px;
    text-align: center;
}

.tips p {
    color: #999;
    font-size: 13px;
}

/* 活动地区选择器样式 */
.location-selector-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.location-select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    background-color: white;
    cursor: pointer;
    transition: all 0.3s;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23667eea' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

.location-select:hover {
    border-color: #667eea;
}

.location-select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.location-select:disabled {
    background-color: #f5f5f5;
    cursor: not-allowed;
    opacity: 0.6;
}

.location-select option {
    padding: 10px;
}

.location-select option[value=""] {
    color: #999;
}

.form-tip {
    margin-top: 8px;
    font-size: 12px;
    color: #999;
    font-style: italic;
}

@media (min-width: 768px) {
    .location-selector-group {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 15px;
    }

    .location-select {
        flex: 0 0 calc(50% - 8px);
        min-width: 150px;
    }
}

@media (max-width: 480px) {
    .auth-box {
        padding: 20px;
    }

    .logo h1 {
        font-size: 20px;
    }
}