/* ============================================================
   加载动效样式集
   ============================================================ */

/* ===== 1. Spinner（缩放圆点） ===== */
.spinner-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 32px;
}
.spinner-dots {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.spinner-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent, rgb(241,64,75));
    display: inline-block;
    animation: spinner-dot-pulse 1.2s ease-in-out infinite;
}
.spinner-dots span:nth-child(1) { animation-delay: 0s; }
.spinner-dots span:nth-child(2) { animation-delay: 0.15s; }
.spinner-dots span:nth-child(3) { animation-delay: 0.3s; }
.spinner-dots span:nth-child(4) { animation-delay: 0.45s; }
.spinner-dots span:nth-child(5) { animation-delay: 0.6s; }
@keyframes spinner-dot-pulse {
    0%, 100% { transform: scale(0.4); opacity: 0.4; }
    50% { transform: scale(1); opacity: 1; }
}

/* ===== 4 & 5. Skeleton + Shimmer（骨架屏 + 微光） ===== */
.skeleton-card {
    background: var(--bg-card, #FFFFFF);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    gap: 16px;
    align-items: flex-start;
}
.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}
.skeleton-lines {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.skeleton-line {
    height: 14px;
    border-radius: 6px;
    position: relative;
    overflow: hidden;
}
.skeleton-line.w60 { width: 60%; }
.skeleton-line.w80 { width: 80%; }
.skeleton-line.w40 { width: 40%; }
.skeleton-image {
    width: 100%;
    height: 160px;
    border-radius: 8px;
    margin-top: 8px;
    position: relative;
    overflow: hidden;
}
.skeleton-block {
    background: var(--border, #E7E4E0);
    opacity: 0.5;
}
/* Shimmer 微光 */
.shimmer::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 40%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
    animation: shimmer-sweep 1.5s ease-in-out infinite;
}
@keyframes shimmer-sweep {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(350%); }
}
/* 骨架块依次淡入 */
.skeleton-card {
    animation: skeleton-fadein 0.4s ease forwards;
}
.skeleton-card:nth-child(2) { animation-delay: 0.1s; opacity: 0; }
.skeleton-card:nth-child(3) { animation-delay: 0.2s; opacity: 0; }
.skeleton-card:nth-child(4) { animation-delay: 0.3s; opacity: 0; }
@keyframes skeleton-fadein {
    to { opacity: 1; }
}

/* ===== 6. Button Loading（按钮加载态） ===== */
.btn-loading {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    pointer-events: none;
    opacity: 0.85;
}
.btn-loading .btn-spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
    flex-shrink: 0;
    width: 18px;
    height: 14px;
}
.btn-loading .btn-spinner span {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: currentColor;
    display: inline-block;
    animation: btn-dot-pulse 1s ease-in-out infinite;
}
.btn-loading .btn-spinner span:nth-child(1) { animation-delay: 0s; }
.btn-loading .btn-spinner span:nth-child(2) { animation-delay: 0.15s; }
.btn-loading .btn-spinner span:nth-child(3) { animation-delay: 0.3s; }
@keyframes btn-dot-pulse {
    0%, 100% { transform: scale(0.3); opacity: 0.4; }
    50% { transform: scale(1); opacity: 1; }
}
.btn-loading.btn-done {
    pointer-events: auto;
    opacity: 1;
}
.btn-loading .btn-check {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    display: none;
}
.btn-loading.btn-done .btn-check {
    display: block;
}
.btn-loading.btn-done .btn-spinner {
    display: none;
}
/* 按钮点击缩放动画 */
.btn-press {
    animation: btn-press 0.2s ease;
}
@keyframes btn-press {
    0% { transform: scale(1); }
    50% { transform: scale(0.97); }
    100% { transform: scale(1); }
}

/* ===== 7. Page Loader（整页加载器） ===== */
/* ===== 搜索叠化转场 ===== */
.search-fade-out {
    animation: search-fade-out 0.3s ease forwards;
}
@keyframes search-fade-out {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-12px); }
}
.search-fade-in {
    animation: search-fade-in 0.5s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}
@keyframes search-fade-in {
    from { opacity: 0; transform: translateY(-24px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== 通用：加载遮罩层 ===== */
.loading-overlay {
    position: absolute;
    inset: 0;
    background: var(--bg-card, #FFFFFF);
    opacity: 0.7;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: inherit;
}

/* ===== 深色模式适配 ===== */
[data-theme="dark"] .spinner-ring .track {
    stroke: rgb(64,65,67);
    opacity: 0.4;
}
[data-theme="dark"] .spinner-dots span {
    background: var(--accent, #2DD4BF);
}
[data-theme="dark"] .skeleton-block {
    background: rgb(64,65,67);
    opacity: 0.4;
}
[data-theme="dark"] .shimmer::after {
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
}
[data-theme="dark"] .loading-overlay {
    background: rgb(18,18,18);
}