/* 全局样式和CSS变量 */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --info-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    --bg-dark: #0f0f23;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 页面切换 */
.page {
    display: none;
    min-height: 100vh;
}

.page.active {
    display: block;
}

/* 登录页面样式 */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.login-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 3rem;
    width: 100%;
    max-width: 480px;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    animation: pulse 2s ease-in-out infinite;
}

.logo-icon svg {
    width: 36px;
    height: 36px;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.login-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.5rem;
}

/* 标签切换 */
.auth-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    position: relative;
    background: rgba(255, 255, 255, 0.03);
    padding: 0.5rem;
    border-radius: var(--radius-md);
}

.auth-tab {
    flex: 1;
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--radius-sm);
    position: relative;
    z-index: 1;
}

.auth-tab.active {
    color: var(--text-primary);
}

.tab-indicator {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    width: calc(50% - 0.5rem);
    height: calc(100% - 1rem);
    background: var(--primary-gradient);
    border-radius: var(--radius-sm);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 0;
}

.auth-tab[data-tab="register"].active ~ .tab-indicator {
    transform: translateX(100%);
}

/* 表单样式 */
.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

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

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    pointer-events: none;
}

.input-wrapper input,
.form-group input,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 3rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input,
.form-group select {
    padding-left: 1rem;
}

.input-wrapper input:focus,
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkbox-custom {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    transition: var(--transition);
    position: relative;
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
    background: var(--primary-gradient);
    border-color: transparent;
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
}

.forgot-password {
    color: #667eea;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.forgot-password:hover {
    color: #764ba2;
}

/* 按钮样式 */
.btn {
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* 背景装饰 */
.background-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    top: -200px;
    left: -200px;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #f093fb, #f5576c);
    bottom: -250px;
    right: -250px;
    animation-delay: -10s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -5s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* 导航栏 */
.navbar {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-small {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-small svg {
    width: 24px;
    height: 24px;
}

.navbar-left h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* 主内容 */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: var(--transition);
}

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

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.stat-icon svg {
    width: 28px;
    height: 28px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.25rem;
}

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

/* 会员管理区域 */
.members-section {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

.section-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.search-box {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

#search-input {
    padding: 0.75rem 1rem 0.75rem 3rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    width: 250px;
    transition: var(--transition);
}

#search-input:focus {
    outline: none;
    border-color: #667eea;
    width: 300px;
}

/* 表格样式 */
.members-table-container {
    overflow-x: auto;
}

.members-table {
    width: 100%;
    border-collapse: collapse;
}

.members-table thead tr {
    border-bottom: 1px solid var(--border-color);
}

.members-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.members-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.members-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

.members-table td {
    padding: 1rem;
}

.status-badge {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.status-active {
    background: rgba(67, 233, 123, 0.2);
    color: #43e97b;
}

.status-inactive {
    background: rgba(245, 87, 108, 0.2);
    color: #f5576c;
}

.status-pending {
    background: rgba(79, 172, 254, 0.2);
    color: #4facfe;
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn-icon-only {
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon-only:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-icon-only.delete:hover {
    background: rgba(245, 87, 108, 0.2);
    color: #f5576c;
}

.btn-icon-only svg {
    width: 18px;
    height: 18px;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
}

.modal.active {
    display: block;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translate(-50%, -48%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

.modal-close {
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.15);
}

.modal-close svg {
    width: 20px;
    height: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

.modal-actions .btn {
    width: auto;
}

/* Toast通知 */
#toast-container {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.toast {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    min-width: 300px;
    box-shadow: var(--shadow-lg);
    animation: toastSlideIn 0.3s ease-out;
    display: flex;
    align-items: center;
    gap: 1rem;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.success {
    border-left: 4px solid #43e97b;
}

.toast.error {
    border-left: 4px solid #f5576c;
}

.toast.info {
    border-left: 4px solid #4facfe;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .login-card {
        padding: 2rem;
    }
    
    .navbar {
        padding: 1rem;
    }
    
    .navbar-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .section-actions {
        width: 100%;
        flex-direction: column;
    }
    
    #search-input {
        width: 100%;
    }
    
    #search-input:focus {
        width: 100%;
    }
    
    .members-table {
        font-size: 0.9rem;
    }
    
    .members-table th,
    .members-table td {
        padding: 0.75rem 0.5rem;
    }
}