/* 输入 / 删除字符缓动浮层 */
.st-type-fx-layer {
    position: fixed;
    inset: 0;
    z-index: 2147483000;
    pointer-events: none;
    overflow: visible;
}

.st-type-fx-char {
    position: fixed;
    left: 0;
    top: 0;
    display: inline-block;
    margin: 0;
    padding: 0;
    font-weight: 600;
    line-height: 1;
    white-space: pre;
    color: var(--st-type-fx-color, #6366f1);
    text-shadow: 0 0 18px color-mix(in srgb, var(--st-type-fx-color, #6366f1) 45%, transparent);
    will-change: transform, opacity, filter;
    pointer-events: none;
    user-select: none;
}

.st-type-fx-char.is-in {
    animation: stTypeFxIn 0.48s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.st-type-fx-char.is-out {
    animation: stTypeFxOut 0.42s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes stTypeFxIn {
    0% {
        opacity: 0;
        transform: translate(-50%, -58%) scale(2.6);
        filter: blur(3px);
    }
    45% {
        opacity: 1;
        filter: blur(0);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(1);
        filter: blur(0);
    }
}

@keyframes stTypeFxOut {
    0% {
        opacity: 0.95;
        transform: translate(-50%, -50%) scale(1);
        filter: blur(0);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -28%) scale(1.75);
        filter: blur(4px);
    }
}

input.st-type-fx-hit:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="file"]):not([type="hidden"]):not([type="color"]),
textarea.st-type-fx-hit {
    animation: stTypeFxField 0.34s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes stTypeFxField {
    0% { transform: scale(1); }
    40% { transform: scale(1.008); }
    100% { transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
    .st-type-fx-char,
    input.st-type-fx-hit,
    textarea.st-type-fx-hit {
        animation: none !important;
    }
}