/* 全局样式 */
:root {
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --secondary-color: #764ba2;
    --success-color: #48bb78;
    --warning-color: #ed8936;
    --danger-color: #f56565;
    --info-color: #4299e1;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-dark: #1a202c;
    --bg-darker: #2d3748;
    
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    --text-white: #ffffff;
    
    --border-color: #e2e8f0;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #ffffff;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-white);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--border-color);
}

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

.btn-danger:hover:not(:disabled) {
    background: #e53e3e;
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* Toast 通知 */
.toast {
    position: fixed;
    top: 80px;
    right: 30px;
    padding: 16px 24px;
    border-radius: 12px;
    background: #ffffff;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    color: #2d3748;
    font-size: 15px;
    font-weight: 500;
    z-index: 99999;
    display: none;
    align-items: center;
    gap: 12px;
    min-width: 280px;
    max-width: 420px;
    border: 1px solid #e2e8f0;
    animation: slideInRight 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.show {
    display: flex;
}

.toast i {
    font-size: 20px;
    flex-shrink: 0;
}

.toast.success {
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: #ffffff;
    border: none;
}

.toast.success i {
    color: #ffffff;
}

.toast.error {
    background: linear-gradient(135deg, #f56565 0%, #e53e3e 100%);
    color: #ffffff;
    border: none;
}

.toast.error i {
    color: #ffffff;
}

.toast.warning {
    background: linear-gradient(135deg, #ed8936 0%, #dd6b20 100%);
    color: #ffffff;
    border: none;
}

.toast.warning i {
    color: #ffffff;
}

.toast.info {
    background: linear-gradient(135deg, #4299e1 0%, #3182ce 100%);
    color: #ffffff;
    border: none;
}

.toast.info i {
    color: #ffffff;
}

@keyframes slideInRight {
    from {
        transform: translateX(120%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(120%);
        opacity: 0;
    }
}

/* 加载动画 */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--text-white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .toast {
        top: 20px;
        right: 15px;
        left: 15px;
        min-width: auto;
        max-width: none;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

/* 表单组件样式 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 14px;
}

.form-group label i {
    color: var(--primary-color);
    margin-right: 6px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group textarea,
.form-group select,
.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: var(--transition);
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="password"]:focus,
.form-group input[type="number"]:focus,
.form-group textarea:focus,
.form-group select:focus,
.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group small {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* 密码输入框包装器 */
.password-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-wrapper input {
    flex: 1;
    padding-right: 45px;
}

.password-input-wrapper .toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.password-input-wrapper .toggle-password:hover {
    color: var(--primary-color);
}

.password-input-wrapper .toggle-password i {
    font-size: 16px;
}

/* 确认对话框 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    max-width: 450px;
    width: 90%;
    animation: slideUp 0.3s ease;
}

.modal.confirm-modal {
    border-radius: 24px;
}

.modal-header {
    padding: 24px 24px 16px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-title i {
    color: var(--warning-color);
    font-size: 24px;
}

.modal-body {
    padding: 24px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.modal-footer .btn {
    padding: 10px 20px;
}

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 工具类 */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.hidden {
    display: none !important;
}