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

:root {
    --primary-color: #667eea;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-color: #48bb78;
    --warning-color: #ed8936;
    --danger-color: #f56565;
    --info-color: #4299e1;
    --light-bg: #f7fafc;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f4f4f5;
    --gray-200: #e4e4e7;
    --gray-300: #d1d5db;
    --gray-600: #4b5563;
    --gray-900: #111827;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    color: var(--gray-900);
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    background: var(--primary-gradient);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-logo i {
    font-size: 2rem;
}

.nav-stats {
    display: flex;
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: 0.5rem;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    min-width: 80px;
}

.stat-item i {
    display: block;
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.stat-item span {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
}

.stat-item small {
    font-size: 0.8rem;
    opacity: 0.9;
}

.stat-item.warning {
    background: rgba(237, 137, 54, 0.2);
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 统计卡片网格 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.stat-card.blue::before { background: var(--info-color); }
.stat-card.orange::before { background: var(--warning-color); }
.stat-card.red::before { background: var(--danger-color); }
.stat-card.green::before { background: var(--success-color); }

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.stat-card.blue .stat-icon { background: var(--info-color); }
.stat-card.orange .stat-icon { background: var(--warning-color); }
.stat-card.red .stat-icon { background: var(--danger-color); }
.stat-card.green .stat-icon { background: var(--success-color); }

.stat-content h3 {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.stat-content p {
    color: var(--gray-600);
    font-size: 0.9rem;
}

/* 警告容器 */
.alerts-container {
    margin-bottom: 20px;
}

.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow-sm);
    animation: slideIn 0.3s ease-out;
}

.alert.warning {
    background: #fff3cd;
    border-left: 4px solid var(--warning-color);
    color: #856404;
}

.alert.danger {
    background: #f8d7da;
    border-left: 4px solid var(--danger-color);
    color: #721c24;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
    overflow: hidden;
    transition: var(--transition);
}

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

.card-header {
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    color: var(--gray-900);
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 1.5rem;
}

/* 表单样式 */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group input {
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
    background: white;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* 文件上传样式 */
.file-upload {
    position: relative;
    border: 2px dashed var(--gray-300);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.file-upload:hover {
    border-color: var(--primary-color);
    background: rgba(102, 126, 234, 0.05);
}

.file-upload input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-upload-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--gray-600);
}

.file-upload-text i {
    font-size: 2rem;
    color: var(--primary-color);
}

/* 按钮样式 */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    text-decoration: none;
    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(--primary-gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

/* 搜索控件 */
.search-controls {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 300px;
    position: relative;
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

.search-box input {
    width: 100%;
    padding: 12px 16px 12px 48px;
    border: 2px solid var(--gray-200);
    border-radius: 25px;
    font-size: 14px;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    outline: none;
}

.filter-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    border: 2px solid var(--gray-200);
    background: white;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.filter-btn.active,
.filter-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

/* 药品网格 */
.medicine-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
}

.medicine-grid.list-view {
    grid-template-columns: 1fr;
}

.medicine-item {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
    border: 2px solid transparent;
    position: relative;
}

.medicine-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.medicine-item.expired {
    border-color: var(--danger-color);
}

.medicine-item.expiring-soon {
    border-color: var(--warning-color);
}

.medicine-item.healthy {
    border-color: var(--success-color);
}

.medicine-image-container {
    height: 200px;
    overflow: hidden;
    background: var(--gray-50);
    display: flex;
    align-items: center;
    justify-content: center;
}

.medicine-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.medicine-image:hover {
    transform: scale(1.05);
}

.medicine-content {
    padding: 1.5rem;
}

.medicine-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.medicine-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.medicine-brand {
    color: var(--gray-600);
    font-size: 0.9rem;
}

.medicine-status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.status-expired {
    background: #fecaca;
    color: #dc2626;
}

.status-expiring {
    background: #fed7aa;
    color: #ea580c;
}

.status-healthy {
    background: #bbf7d0;
    color: #059669;
}

.medicine-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
    margin-bottom: 1.5rem;
}

.detail-item {
    text-align: center;
}

.detail-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    display: block;
}

.detail-label {
    font-size: 0.8rem;
    color: var(--gray-600);
    margin-top: 2px;
}

.medicine-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

/* 视图切换按钮 */
.view-options {
    display: flex;
    gap: 5px;
}

.view-btn {
    padding: 8px 12px;
    border: 2px solid var(--gray-200);
    background: white;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.view-btn.active,
.view-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease-out;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-600);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--danger-color);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-600);
}

.empty-state i {
    font-size: 4rem;
    color: var(--gray-300);
    margin-bottom: 1rem;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

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

@keyframes slideIn {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .nav-container {
        padding: 0 15px;
    }
    
    .nav-stats {
        gap: 15px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
    }
    
    .search-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        min-width: auto;
    }
    
    .medicine-grid {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav-logo span {
        display: none;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .medicine-content {
        padding: 1rem;
    }
}

/* 表单动画 */
.add-medicine-card .card-body {
    max-height: 1000px;
    transition: var(--transition);
    overflow: hidden;
}

.add-medicine-card .card-body.collapsed {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
}

.btn-toggle {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}

.btn-toggle.rotated {
    transform: rotate(180deg);
}