/* =============================================================
   effects.css — 动画与光效
   入场动画 · 按键提示「点燃」effect · 爱心脉动 · 花瓣 · 扫描进度
   ============================================================= */

/* ===== 入场 ===== */
@keyframes overlay-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes panel-in {
    from { opacity: 0; transform: translateY(16px) scale(0.975); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes msg-in {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes dialogue-enter {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ===== 爱心脉动（强调装饰） ===== */
@keyframes heart-pulse {
    0%, 100% { transform: scale(1); opacity: 0.9; }
    50%      { transform: scale(1.16); opacity: 1; }
}

/* ===== 造梦样式修改进度扫描（沿用旧动画名，JS 切 .active 触发） ===== */
@keyframes dream-progress-scan {
    from { background-position: 0 0; }
    to   { background-position: 200% 0; }
}

/* =============================================================
   点燃（ignite）—— 按键提示触发时的光效
   JS 在触发瞬间：① 给可见提示按钮加 .igniting（按钮自身辉光）；
   ② 在按钮中心生成独立 .ignite-burst（光环 + 火花），即使按钮随即
   隐藏也能完整播放。详见 main.js#ignitePrompt。
   按钮自身 transform 用于居中，故辉光只动 box-shadow。
   ============================================================= */
.kbd-prompt.igniting,
.sleep-btn.igniting,
#room-panorama-close.igniting,
.dream-revision-action.igniting {
    animation: ignite-glow 0.5s var(--ease-out);
}

@keyframes ignite-glow {
    0%   { box-shadow: var(--shadow-hud), 0 0 0 rgba(230,193,120,0); }
    28%  { box-shadow: 0 0 26px rgba(255,224,176,0.95), 0 0 56px rgba(229,138,166,0.7), inset 0 0 18px rgba(255,236,200,0.6); }
    100% { box-shadow: var(--shadow-hud), 0 0 0 rgba(230,193,120,0); }
}

/* 独立点燃爆发：JS 设定 left/top 到目标按钮中心 */
.ignite-burst {
    position: fixed;
    z-index: 140;
    width: 0;
    height: 0;
    pointer-events: none;
}
/* 扩散光环 */
.ignite-burst::before {
    content: "";
    position: absolute;
    left: 0; top: 0;
    width: 70px; height: 70px;
    border-radius: 50%;
    border: 2px solid rgba(255,224,176,0.95);
    background: radial-gradient(circle, rgba(255,238,205,0.55), rgba(229,138,166,0.12) 55%, transparent 72%);
    transform: translate(-50%, -50%) scale(0.25);
    animation: ignite-ring 0.55s var(--ease-out) forwards;
}
@keyframes ignite-ring {
    0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.25); }
    30%  { opacity: 1; }
    100% { opacity: 0; transform: translate(-50%, -50%) scale(2.6); }
}
/* 四角星火花 */
.ignite-burst::after {
    content: "";
    position: absolute;
    left: 0; top: 0;
    width: 92px; height: 92px;
    background: url(../src/_ui/spark.svg) center / contain no-repeat;
    transform: translate(-50%, -50%) scale(0.3) rotate(0deg);
    animation: ignite-spark 0.55s var(--ease-out) forwards;
}

@keyframes ignite-spark {
    0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.3) rotate(-30deg); }
    25%  { opacity: 1; }
    100% { opacity: 0; transform: translate(-50%, -50%) scale(1.9) rotate(60deg); }
}

/* ===== 飘落花瓣（装饰层，按需用于 hero 区域） ===== */
.petal-layer {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}
.petal-layer .petal {
    position: absolute;
    top: -28px;
    width: 22px;
    height: 22px;
    background: url(../src/_ui/petal.svg) center / contain no-repeat;
    opacity: 0.0;
    animation: petal-fall linear infinite;
}
.petal-layer .petal:nth-child(1) { left: 12%; animation-duration: 11s; animation-delay: 0s;   transform: scale(0.8); }
.petal-layer .petal:nth-child(2) { left: 34%; animation-duration: 14s; animation-delay: 2.5s; transform: scale(1.1); }
.petal-layer .petal:nth-child(3) { left: 58%; animation-duration: 12s; animation-delay: 1.2s; transform: scale(0.7); }
.petal-layer .petal:nth-child(4) { left: 78%; animation-duration: 15s; animation-delay: 3.4s; transform: scale(1); }
.petal-layer .petal:nth-child(5) { left: 90%; animation-duration: 13s; animation-delay: 0.8s; transform: scale(0.85); }

@keyframes petal-fall {
    0%   { opacity: 0; transform: translateY(0) translateX(0) rotate(0deg); }
    12%  { opacity: 0.75; }
    88%  { opacity: 0.6; }
    100% { opacity: 0; transform: translateY(360px) translateX(40px) rotate(220deg); }
}

/* 尊重减少动态偏好 */
@media (prefers-reduced-motion: reduce) {
    .ui-overlay, .otome-panel, .petal-layer .petal { animation: none !important; }
}