/* 基础样式 */
:root {
    --primary-color: #2C4EC9;
    --primary-light: #4A6FE3;
    --primary-dark: #1E3A8A;
    --secondary-color: #F6F8FF;
    --accent-color: #6366F1;
    --danger-color: #EF4444;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --light-color: #F8FAFC;
    --dark-color: #1E293B;
    --gray-color: #E2E8F0;
    --gray-light: #F1F5F9;
    --text-color: #334155;
    --text-light: #64748B;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --box-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --gradient-primary: linear-gradient(135deg, #2C4EC9 0%, #4A6FE3 100%);
    --gradient-secondary: linear-gradient(135deg, #F6F8FF 0%, #E0E7FF 100%);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--gradient-secondary);
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

/* 布局 */
.container {
    max-width: 100%;
    padding: 20px;
    margin: 0 auto;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    box-shadow: var(--box-shadow-lg);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.app-header {
    padding: 20px 24px;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.app-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.05)"/><circle cx="90" cy="40" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.app-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    position: relative;
    z-index: 1;
}

.welcome-msg {
    font-size: 1.1rem;
    opacity: 0.9;
}

.app-main {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    background-color: var(--light-color);
    margin-bottom: 80px;
}

.app-nav {
    display: flex;
    justify-content: space-around;
    padding: 16px 0;
    background-color: white;
    border-top: 1px solid var(--gray-color);
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1);
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 800px;
    z-index: 1000;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-light);
    font-size: 0.8rem;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    position: relative;
}

.nav-item i {
    font-size: 1.5rem;
    margin-bottom: 4px;
    transition: all 0.3s ease;
}

.nav-item:hover {
    color: var(--primary-color);
    background-color: var(--secondary-color);
}

.nav-item.active {
    color: var(--primary-color);
    background-color: var(--secondary-color);
    font-weight: 600;
}

.nav-item.active i {
    color: var(--primary-color);
    transform: scale(1.1);
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    margin-bottom: 24px;
    padding: 24px;
    border: 1px solid var(--gray-color);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--box-shadow-lg);
    transform: translateY(-2px);
}

.auth-card {
    max-width: 400px;
    margin: 0 auto;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow-lg);
    padding: 24px;
}

.welcome-card {
    text-align: center;
    padding: 48px 24px;
}

.day-card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
    padding: 16px;
    border: 1px solid var(--gray-color);
    transition: all 0.3s ease;
}

.day-card:hover {
    box-shadow: var(--box-shadow-lg);
}

/* 表单样式 */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px;
    height: 52px;
    border: 2px solid var(--gray-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(44, 78, 201, 0.1);
}

.remember-me {
    display: flex;
    align-items: center;
}

.remember-me input {
    width: auto;
    margin-right: 10px;
}

/* 认证链接样式 */
.auth-links {
    text-align: center;
    margin-top: 16px;
}

.auth-links a {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.auth-links a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* 邀请码链接样式 */
.invitation-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.invitation-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    border-radius: var(--border-radius);
    font-size: 1rem;
    height: 52px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    width: 100%;
    box-shadow: 0 4px 14px 0 rgba(44, 78, 201, 0.39);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px 0 rgba(44, 78, 201, 0.5);
}

.btn-secondary {
    background: var(--gradient-secondary);
    color: var(--primary-color);
    width: 100%;
    margin-top: 12px;
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-logout {
    color: white;
    font-size: 1.2rem;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.btn-logout:hover {
    background: rgba(255,255,255,0.2);
    transform: scale(1.1);
}

.btn-export {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: auto;
    padding: 12px 30px;
}

.btn-export i {
    margin-right: 8px;
}

.auth-buttons {
    margin-top: 32px;
}

/* 列表样式 */
.record-list {
    list-style: none;
}

.record-item {
    padding: 16px 0;
    border-bottom: 1px solid var(--gray-color);
    transition: all 0.3s ease;
}

.record-item:hover {
    background-color: var(--secondary-color);
    margin: 0 -16px;
    padding: 16px;
    border-radius: var(--border-radius);
}

.record-item-main {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.record-item-date {
    font-size: 0.8rem;
    color: var(--text-light);
}

.item-list {
    list-style: none;
    margin-top: 12px;
}

.item-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px dashed var(--gray-color);
    transition: all 0.3s ease;
}

.item-list li:hover {
    background-color: var(--secondary-color);
    margin: 0 -12px;
    padding: 12px;
    border-radius: var(--border-radius);
}

/* 摘要卡片 */
.summary-card {
    text-align: center;
    padding: 10px 20px;
    background: var(--gradient-secondary);
    border-radius: var(--border-radius-lg);
    margin-bottom: 16px;
    border: 2px solid var(--primary-color);
    position: relative;
    overflow: hidden;
}

.summary-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(44, 78, 201, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.summary-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 4px;
    position: relative;
    z-index: 1;
}

.summary-label {
    font-size: 0.9rem;
    color: var(--text-color);
    font-weight: 600;
    position: relative;
    z-index: 1;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 24px;
    text-align: center;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--gray-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-lg);
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 500;
}

/* 图表容器 */
.chart-container {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--gray-color);
}

.chart-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 20px;
    text-align: center;
}

/* 提示信息 */
.alert {
    padding: 16px;
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    border: 1px solid;
}

.alert-error {
    background-color: #FEF2F2;
    color: var(--danger-color);
    border-color: #FECACA;
}

.alert-success {
    background-color: #F0FDF4;
    color: var(--success-color);
    border-color: #BBF7D0;
}

.no-records {
    text-align: center;
    color: var(--text-light);
    padding: 48px 24px;
    font-size: 1.1rem;
}

/* 删除按钮样式 */
.btn-delete {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.btn-delete:hover {
    background-color: #FEF2F2;
    color: #DC2626;
    transform: scale(1.1);
}

.delete-form {
    display: inline-block;
    margin-left: auto;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .app-container {
        border-radius: 0;
        max-width: 100%;
    }
    
    .app-header {
        padding: 16px 20px;
    }
    
    .app-header h1 {
        font-size: 1.5rem;
    }
    
    .app-main {
        padding: 20px;
        margin-bottom: 80px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .summary-value {
        font-size: 2rem;
    }
    
    .app-nav {
        max-width: 100%;
        left: 0;
        transform: none;
    }
    
    .header-actions {
        flex-direction: row;
        gap: 12px;
        align-items: center;
    }
    
    .auth-card {
        padding: 20px;
        margin: 16px;
        max-width: calc(100% - 32px);
        width: 100%;
    }
    
    .form-group {
        margin-bottom: 14px;
    }
    
    .form-group label {
        margin-bottom: 5px;
    }
}

@media (max-width: 480px) {
    .auth-card {
        padding: 20px;
        margin: 16px;
        max-width: calc(100% - 32px);
        width: 100%;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        height: 52px;
        padding: 14px;
        font-size: 16px; /* 防止iOS缩放 */
    }
    
    .btn {
        height: 52px;
        padding: 14px 20px;
    }
    
    .app-header h1 {
        font-size: 1.25rem;
    }
    
    .header-actions {
        flex-direction: row;
        gap: 10px;
        align-items: center;
    }
    
    .welcome-msg {
        font-size: 1rem;
    }
}

/* 邀请码表格样式 */
.invitation-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.invitation-table th, 
.invitation-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-color);
}

.invitation-table th {
    background-color: var(--secondary-color);
    font-weight: 600;
    color: var(--text-color);
}

.invitation-table tr:hover {
    background-color: var(--gray-light);
}

/* 邀请码管理页面专用样式 */
.invitation-management .data-table th,
.invitation-management .data-table td {
    padding: 12px 16px; /* 减少垂直padding，使表格更紧凑 */
}

.invitation-management .data-table tr {
    height: 48px; /* 固定行高，使表格更紧凑 */
}

.invitation-management .btn-export {
    background: var(--gradient-secondary);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 12px 24px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all 0.3s ease;
}

.invitation-management .btn-export:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 14px 0 rgba(44, 78, 201, 0.39);
}

.status-active {
    color: var(--success-color);
    font-weight: 600;
}

/* 帮助文本 */
.help-text {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 8px;
}

/* 管理员页面样式 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.data-table th, 
.data-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--gray-color);
}

.data-table th {
    background-color: var(--secondary-color);
    font-weight: 600;
    color: var(--text-color);
}

.data-table tr:hover {
    background-color: var(--gray-light);
}

/* 徽章样式 */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-active {
    background-color: #DCFCE7;
    color: var(--success-color);
}

.badge-used {
    background-color: var(--gray-light);
    color: var(--text-light);
}

.badge-inactive {
    background-color: #FEE2E2;
    color: var(--danger-color);
}

/* 内联表单 */
.inline-form {
    display: inline-block;
    margin-right: 8px;
}

/* 小按钮 */
.btn-sm {
    padding: 8px 16px;
    font-size: 0.8rem;
    height: 40px;
}

/* 添加记录表单样式 */
.add-record {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--gray-color);
}

.record-form {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 16px;
    align-items: end;
}

@media (max-width: 768px) {
    .record-form {
        grid-template-columns: 1fr;
    }
}

/* 时间选择器样式 */
.time-selector {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    background: white;
    padding: 16px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.time-selector button {
    padding: 8px 16px;
    border: 2px solid var(--gray-color);
    background: white;
    color: var(--text-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.time-selector button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.time-selector button:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.time-selector button.active:hover {
    color: white;
}