/* 按钮组件 - 深色主题 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(124, 58, 237, 0.4);
}

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

.btn-secondary {
    background: transparent;
    color: var(--primary-light);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-glow);
}

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

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-light);
    background: rgba(124, 58, 237, 0.1);
}

.btn-sm {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1.125rem 2.25rem;
    font-size: 1.125rem;
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    box-shadow: 0 6px 16px rgba(239, 68, 68, 0.4);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

/* 卡片组件 - 深色玻璃拟态 */
.card {
    background: var(--gradient-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

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

.card-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* 表单组件 - 深色主题 */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.625rem;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: var(--bg-elevated);
    color: var(--text-primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.2);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    background-color: var(--bg-elevated);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.2);
}

.form-select option {
    background-color: var(--bg-elevated);
    color: var(--text-primary);
}

/* 标签组件 - 深色主题 */
.tag {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    backdrop-filter: blur(8px);
}

.tag-primary {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.2) 0%, rgba(167, 139, 250, 0.15) 100%);
    color: var(--primary-light);
    border: 1px solid rgba(124, 58, 237, 0.3);
}

.tag-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(52, 211, 153, 0.15) 100%);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.tag-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(251, 191, 36, 0.15) 100%);
    color: var(--warning-color);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.tag-danger {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, rgba(248, 113, 113, 0.15) 100%);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* 模态框 - 深色主题 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 15, 26, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

/* 协议模态框在上层 */
#membership-agreement-modal,
#auto-renewal-agreement-modal {
    z-index: 2000;
}

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

.modal {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9) translateY(20px);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-xl);
    margin: auto;
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: 1.75rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 1.75rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.3s ease;
    line-height: 1;
    padding: 0.25rem;
}

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

.modal-body {
    padding: 1.75rem;
    color: var(--text-secondary);
}

.modal-footer {
    padding: 1.75rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* Toast 通知 - 深色主题 */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 2000;
}

.toast {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.125rem 1.75rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 0.875rem;
    animation: slideIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-primary);
}

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

.toast-success {
    border-left: 4px solid var(--success-color);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.2);
}

.toast-error {
    border-left: 4px solid var(--danger-color);
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.2);
}

.toast-warning {
    border-left: 4px solid var(--warning-color);
    box-shadow: 0 8px 24px rgba(251, 191, 36, 0.2);
}

/* 支付弹窗 - 深色主题 */
.payment-modal {
    max-width: 450px;
}

.payment-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* 套餐信息 */
.payment-plan-info {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.payment-plan-info h4 {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.payment-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
}

.price-amount {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-period {
    color: var(--text-muted);
    font-size: 1rem;
}

/* 支付二维码 */
.payment-qr-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.qr-code-wrapper {
    padding: 1.5rem;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-code-wrapper img,
.qr-code-wrapper canvas {
    display: block;
    border-radius: 4px;
}

.payment-tip {
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-align: center;
}

/* 支付选项 */
.payment-options {
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    border: 1px solid var(--border-color);
}

.option-desc {
    margin-top: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    padding-left: 1.75rem;
}

/* 会员协议 */
.payment-agreement {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

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

.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-elevated);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: white;
}

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

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
    content: '✓';
}

.checkbox-text {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.agreement-link {
    color: var(--primary-light);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: all 0.3s ease;
}

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

/* 支付确认按钮 */
#payment-confirm-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--text-muted);
}

#payment-confirm-btn:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(124, 58, 237, 0.4);
}

/* 协议内容样式 */
.agreement-content {
    max-height: 400px;
    overflow-y: auto;
}

.agreement-content h4 {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin: 1.25rem 0 0.75rem 0;
}

.agreement-content h4:first-child {
    margin-top: 0;
}

.agreement-content p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 0.5rem;
}

.agreement-content::-webkit-scrollbar {
    width: 6px;
}

.agreement-content::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 3px;
}

.agreement-content::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
}

.agreement-content::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}