/* 弹窗背景美化 - 排除登录/注册等系统弹窗 */
.modal-backdrop.in:not(.signin-modal):not(.signup-modal) {
    backdrop-filter: blur(8px) saturate(150%);
    -webkit-backdrop-filter: blur(8px) saturate(150%);
    background: rgba(0,0,0,0.35) !important;
    opacity: 1 !important;
}

/* 只对非系统弹窗应用美化效果 */
.modal-content:not(#signin-modal .modal-content):not(#signup-modal .modal-content):not(#resetpassword-modal .modal-content) {
    background: rgba(255,255,255,0.92) !important;
    backdrop-filter: blur(25px) saturate(180%);
    -webkit-backdrop-filter: blur(25px) saturate(180%);
    border: 1px solid rgba(255,255,255,0.5) !important;
    box-shadow: 0 10px 40px rgba(0,0,0,0.12), inset 0 1px 0 rgba(255,255,255,0.6) !important;
    overflow: hidden;
    position: relative;
}

.modal-content:not(#signin-modal .modal-content):not(#signup-modal .modal-content):not(#resetpassword-modal .modal-content)::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle at 100% 0%, rgba(102,126,234,0.08), transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.modal-content:not(#signin-modal .modal-content):not(#signup-modal .modal-content):not(#resetpassword-modal .modal-content)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle at 0% 100%, rgba(67,233,123,0.06), transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.modal-content:not(#signin-modal .modal-content):not(#signup-modal .modal-content):not(#resetpassword-modal .modal-content) > * {
    position: relative;
    z-index: 1;
}

body.dark-theme .modal-content:not(#signin-modal .modal-content):not(#signup-modal .modal-content):not(#resetpassword-modal .modal-content) {
    background: rgba(30,30,45,0.92) !important;
    border-color: rgba(255,255,255,0.08) !important;
}

body.dark-theme .modal-backdrop.in:not(.signin-modal):not(.signup-modal) {
    background: rgba(0,0,0,0.5) !important;
}

.modal-content:not(#signin-modal .modal-content):not(#signup-modal .modal-content):not(#resetpassword-modal .modal-content) .modal-header {
    border-bottom-color: rgba(102,126,234,0.1) !important;
}

.modal-content:not(#signin-modal .modal-content):not(#signup-modal .modal-content):not(#resetpassword-modal .modal-content) .modal-footer {
    border-top-color: rgba(102,126,234,0.1) !important;
}