/* =========================================================
   theme-spring.css — 春天主题特效
   只在 html.theme-spring 时生效
   ========================================================= */

/* ===== 樱花 ===== */
html.theme-spring .sakura {
    position: fixed;
    top: -40px;
    pointer-events: none;
    z-index: 2;
    user-select: none;
    opacity: 0.85;
    line-height: 1;
    filter: drop-shadow(0 0 4px rgba(255, 182, 213, 0.6));
    will-change: transform, opacity;
}

@keyframes sakuraFall {
    0% {
        transform: translate(0, 0) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.9;
    }
    100% {
        transform: translate(var(--drift, 40px), 105vh) rotate(var(--rotate, 360deg));
        opacity: 0;
    }
}

/* ===== 点击花朵 ===== */
html.theme-spring .click-flower {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    user-select: none;
    line-height: 1;
    transform: translate(-50%, -50%) scale(0);
    animation: flowerBloom 1.2s ease-out forwards;
    filter: drop-shadow(0 0 8px rgba(255, 182, 213, 0.8));
}

@keyframes flowerBloom {
    0% {
        transform: translate(-50%, -50%) scale(0) rotate(-45deg);
        opacity: 0;
    }
    40% {
        transform: translate(-50%, -50%) scale(1.2) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(1) rotate(15deg);
        opacity: 0;
    }
}