/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #667eea;
    min-height: 100vh;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 400px;
}

/* 活动信息卡片 */
.meeting-card {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.meeting-title {
    font-size: 24px;
    font-weight: bold;
    color: #333;
    margin-bottom: 20px;
    line-height: 1.3;
}

.meeting-info {
    margin-bottom: 25px;
}

.info-item {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    margin-bottom: 12px;
    font-size: 15px;
}

.info-label {
    font-weight: 600;
    color: #666;
    margin-right: 8px;
    min-width: 85px;
}

.info-value {
    color: #333;
    flex: 1;
    text-align: left;
}

/* 签到状态 */
.sign-status {
    margin-bottom: 25px;
    padding: 15px;
    background: #f5f7fa;
    border-radius: 10px;
}

.status-text {
    color: #666;
    font-size: 15px;
}

/* 签到按钮 */
.sign-btn {
    width: 100%;
    padding: 15px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 30px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.sign-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(76, 175, 80, 0.4);
}

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

.sign-btn:disabled {
    background: #cccccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 签到信息模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: white;
    border-radius: 20px;
    padding: 20px;
    width: 90%;
    max-width: 400px;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 30px;
    color: #666;
    cursor: pointer;
    transition: color 0.3s ease;
    z-index: 10;
}

.close-btn:hover {
    color: #333;
}

.modal-content h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
    font-size: 20px;
}

/* 表单样式 */
.form-container {
    width: 100%;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
    font-size: 16px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    cursor: pointer;
}

.form-group select {
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
    background-position: right 12px center;
    background-repeat: no-repeat;
    background-size: 16px;
    padding-right: 40px;
}

.form-group input {
    cursor: text;
}

.form-group input:focus,
.form-group select:focus {
    border-color: #4CAF50;
}

.form-group input::placeholder {
    color: #999;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 30px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
    margin-top: 10px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(76, 175, 80, 0.4);
}

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

.submit-btn:disabled {
    background: #cccccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 签到成功提示 */
.toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.7);
    padding: 20px;
    border-radius: 10px;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.toast.active {
    opacity: 1;
    visibility: visible;
}

.toast-content {
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.toast-icon {
    font-size: 24px;
    margin-right: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #4CAF50;
}

.toast-text {
    font-size: 16px;
    margin: 0;
}

.hidden {
    display: none;
}

/* 响应式设计 */
@media (max-width: 480px) {
    .meeting-card {
        padding: 20px;
    }
    
    .meeting-title {
        font-size: 20px;
    }
    
    .scan-container {
        height: 250px;
    }
    
    .scan-frame {
        width: 200px;
        height: 200px;
    }
    
    @keyframes scan {
        100% {
            transform: translateY(200px);
        }
    }
}