:root {
    --activity-card-bg: rgba(255, 255, 255, 0.74);
    --activity-card-bg-strong: rgba(255, 255, 255, 0.86);
    --activity-card-border: rgba(18, 21, 28, 0.08);
    --activity-card-shadow: 0 18px 42px rgba(16, 22, 35, 0.08);
    --activity-muted: #6d7382;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] {
    --home-bg: #f6f2ea;
    --home-surface: rgba(255, 255, 255, 0.72);
    --home-surface-strong: rgba(255, 255, 255, 0.9);
    --home-line: rgba(20, 34, 56, 0.1);
    --home-line-strong: rgba(20, 34, 56, 0.16);
    --home-text: #142238;
    --home-muted: #5b6878;
    --home-muted-soft: #7b8795;
    --home-accent: #67c0bf;
    --home-accent-strong: #177e89;
    --home-accent-mint: #f2b66d;
    --home-shadow: 0 18px 60px rgba(20, 34, 56, 0.08);
    --home-shadow-strong: 0 32px 92px rgba(20, 34, 56, 0.14);
    --activity-card-border: rgba(23, 126, 137, 0.12);
    --activity-card-shadow: 0 20px 48px rgba(20, 34, 56, 0.09);
    --activity-muted: #667385;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .page-background {
    background:
        linear-gradient(rgba(20, 34, 56, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(20, 34, 56, 0.045) 1px, transparent 1px),
        linear-gradient(180deg, #fbf7f0 0%, #f6f2ea 48%, #f4ede1 100%);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .page-background::before {
    background: radial-gradient(circle, rgba(76, 176, 183, 0.4) 0%, rgba(76, 176, 183, 0.14) 34%, transparent 72%);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .page-background::after {
    background: radial-gradient(circle, rgba(242, 182, 109, 0.26) 0%, rgba(23, 126, 137, 0.15) 42%, transparent 72%);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-detail-hero::before {
    background: linear-gradient(180deg, rgba(251, 247, 240, 0.95) 0%, rgba(246, 242, 234, 0.89) 68%, rgba(246, 242, 234, 0.98) 100%);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-detail-copy {
    position: relative;
    isolation: isolate;
    padding: 2rem 2rem 2.3rem;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-detail-copy::before {
    content: '';
    position: absolute;
    inset: -0.8rem 6% auto;
    height: 23rem;
    border-radius: 999px;
    background:
        radial-gradient(circle at 18% 50%, rgba(242, 182, 109, 0.28), transparent 34%),
        radial-gradient(circle at 72% 44%, rgba(23, 126, 137, 0.28), transparent 38%),
        linear-gradient(135deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.14));
    filter: blur(8px);
    opacity: 0.95;
    z-index: -2;
    pointer-events: none;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-detail-copy::after {
    content: '';
    position: absolute;
    inset: 0 auto auto 50%;
    width: min(42rem, 88%);
    height: 17rem;
    transform: translateX(-50%);
    border-radius: 2.2rem;
    border: 1px solid rgba(23, 126, 137, 0.12);
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.56), rgba(255, 255, 255, 0.18)),
        radial-gradient(circle at top right, rgba(23, 126, 137, 0.16), transparent 34%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.58);
    z-index: -1;
    pointer-events: none;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .section-kicker {
    color: #73849a;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .section-kicker::before {
    display: none;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .site-nav-link:hover,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .site-nav-link.is-active {
    background: linear-gradient(135deg, rgba(23, 126, 137, 0.14), rgba(242, 182, 109, 0.12));
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .site-nav-ghost {
    border-color: rgba(23, 126, 137, 0.14);
    background: rgba(255, 255, 255, 0.52);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .site-nav-ghost:hover {
    background: rgba(23, 126, 137, 0.08);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .site-nav-cta,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .button-primary,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-list-link,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .result-showcase-action,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-topic-chip.is-active,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] a.activity-trial-open,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] a.activity-trial-open:visited,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] a.activity-trial-open:hover,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] a.activity-trial-open:active {
    color: #ffffff !important;
    -webkit-text-fill-color: #ffffff;
    background: linear-gradient(135deg, #142238 0%, #177e89 72%, #2d8f97 100%);
    box-shadow: 0 14px 28px rgba(20, 34, 56, 0.18);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .site-nav-cta:hover,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .button-primary:hover,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-list-link:hover,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .result-showcase-action:hover {
    box-shadow: 0 18px 34px rgba(20, 34, 56, 0.22);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-meta-pill,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-list-meta span,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-signup-notice,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-rating-submit {
    border-color: rgba(23, 126, 137, 0.2);
    background: linear-gradient(135deg, rgba(220, 239, 237, 0.92), rgba(244, 235, 221, 0.88));
    color: var(--home-text);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-overview-panel,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-detail-panel,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-signup-panel,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-intro-block-text,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-intro-block-image,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-trial-frame-wrap,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .result-showcase-card {
    border-color: rgba(23, 126, 137, 0.12);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(250, 247, 241, 0.94));
    box-shadow: 0 20px 48px rgba(20, 34, 56, 0.09);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-overview-panel,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-detail-panel,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-signup-panel {
    position: relative;
    overflow: hidden;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-overview-panel::before,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-signup-panel::before {
    display: none;
    content: none;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-overview-panel::after,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-signup-panel::after {
    content: '';
    position: absolute;
    inset: auto -18% -28% auto;
    width: 15rem;
    height: 15rem;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(23, 126, 137, 0.14), transparent 70%);
    pointer-events: none;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-signup-panel {
    position: sticky;
    overflow: visible;
    top: 112px;
    border-color: rgba(23, 126, 137, 0.2);
    background:
        radial-gradient(circle at top right, rgba(23, 126, 137, 0.14), transparent 30%),
        radial-gradient(circle at bottom left, rgba(242, 182, 109, 0.14), transparent 34%),
        linear-gradient(180deg, rgba(254, 255, 255, 0.9), rgba(246, 242, 234, 0.98));
    box-shadow: 0 24px 56px rgba(20, 34, 56, 0.12);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-detail-panel {
    background:
        radial-gradient(circle at top left, rgba(23, 126, 137, 0.08), transparent 26%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(250, 247, 241, 0.96));
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-list-media,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .result-showcase-thumb {
    background:
        radial-gradient(circle at top right, rgba(23, 126, 137, 0.18), transparent 30%),
        radial-gradient(circle at bottom left, rgba(242, 182, 109, 0.16), transparent 34%),
        linear-gradient(145deg, rgba(249, 252, 252, 0.94), rgba(246, 242, 234, 0.92));
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-input:focus,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-select:focus,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-textarea:focus {
    border-color: rgba(23, 126, 137, 0.34);
    box-shadow: 0 0 0 4px rgba(23, 126, 137, 0.12);
    background: rgba(255, 255, 255, 0.92);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-checkbox-chip input {
    accent-color: #177e89;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-topic-chip {
    border-color: rgba(23, 126, 137, 0.14);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-topic-chip:not(.is-active):hover {
    background: rgba(23, 126, 137, 0.06);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-detail-title {
    color: #142238;
    font-size: clamp(3.1rem, 6vw, 5.55rem);
    text-shadow: 0 10px 24px rgba(255, 255, 255, 0.24);
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-detail-summary {
    max-width: 50rem;
    color: #55677d;
    font-size: 1.12rem;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-subsection-title {
    color: #163652;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-overview-panel span,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-field-label,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-trial-tag {
    color: #50758a;
}

.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-overview-panel strong,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-subsection-title,
.activity-shell-body[data-activity-theme='hongyan-ai-genesis'] #signupTitle {
    color: #163652;
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
    .activity-shell-body[data-activity-theme='hongyan-ai-genesis'] .activity-detail-title {
        background: linear-gradient(135deg, #163652 4%, #0f6c86 40%, #1f8d8b 68%, #b67b35 100%);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }
}

.activity-shell-body .page-background::before {
    top: -10vh;
    right: -10vw;
    width: 40vw;
    height: 40vw;
}

.activity-shell-body .page-background::after {
    left: -14vw;
    bottom: -4vh;
    width: 28vw;
    height: 28vw;
}

.activity-main {
    padding-bottom: 2rem;
}

.activity-inline-status {
    min-height: 1.5rem;
    margin-top: 1.2rem;
    color: var(--home-muted);
    font-size: 0.94rem;
}

.activity-overview-hero,
.activity-detail-hero {
    min-height: auto;
    padding-top: 152px;
    padding-bottom: 4.2rem;
}

.activity-overview-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 0.9fr);
    gap: 2rem;
    align-items: center;
}

.activity-overview-copy .hero-title {
    max-width: 14ch;
}

.activity-overview-metrics {
    max-width: 44rem;
}

.activity-overview-visual {
    position: relative;
}

.activity-cubes-panel {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 640px;
    overflow: hidden;
    border-radius: 38px;
    border: 1px solid rgba(18, 21, 28, 0.08);
    background:
        radial-gradient(circle at top right, rgba(182, 194, 255, 0.2), transparent 34%),
        radial-gradient(circle at bottom left, rgba(213, 233, 255, 0.18), transparent 32%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(243, 246, 251, 0.95) 52%, rgba(237, 241, 248, 0.98));
    box-shadow: 0 28px 48px rgba(24, 32, 52, 0.1);
    isolation: isolate;
    --activity-cube-gap-col: 6%;
    --activity-cube-gap-row: 6%;
    --activity-cube-perspective: 99999999px;
    --activity-cube-stroke-color: rgba(196, 177, 243, 0.78);
    --activity-cube-stroke-width: 1.8px;
    --activity-cube-dash-length: 8px;
    --activity-cube-dash-gap: 5px;
    --activity-cube-bg: rgba(26, 31, 67, 0.9);
    --activity-cube-ripple: #efe7ff;
    --activity-cube-shadow: 0 8px 18px rgba(35, 31, 84, 0.1);
}

.activity-cubes-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(rgba(41, 49, 76, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(41, 49, 76, 0.04) 1px, transparent 1px);
    background-size: 96px 96px;
    opacity: 0.52;
    pointer-events: none;
}

.activity-cubes-panel::after {
    content: '';
    position: absolute;
    inset: 12% 10%;
    border-radius: 30px;
    background:
        radial-gradient(circle at center, rgba(255, 255, 255, 0.54), transparent 60%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.01));
    opacity: 0.58;
    filter: blur(6px);
    pointer-events: none;
}

.activity-cubes-scene {
    position: relative;
    z-index: 1;
    display: grid;
    width: min(88%, 560px);
    aspect-ratio: 1 / 1;
    height: auto;
    column-gap: var(--activity-cube-gap-col);
    row-gap: var(--activity-cube-gap-row);
    perspective: var(--activity-cube-perspective);
    grid-auto-rows: 1fr;
    touch-action: none;
}

.activity-cube {
    position: relative;
    width: 100%;
    height: 100%;
    aspect-ratio: 1 / 1;
    transform-style: preserve-3d;
}

.activity-cube::before {
    content: '';
    position: absolute;
    top: -30px;
    right: -30px;
    bottom: -30px;
    left: -30px;
}

.activity-cube-face {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--activity-cube-bg);
    box-shadow: var(--activity-cube-shadow);
    opacity: 1;
    transition: background-color 220ms ease, box-shadow 220ms ease;
}

.activity-cube-face::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        repeating-linear-gradient(
            90deg,
            var(--activity-cube-stroke-color) 0 var(--activity-cube-dash-length),
            transparent var(--activity-cube-dash-length) calc(var(--activity-cube-dash-length) + var(--activity-cube-dash-gap))
        ) top / 100% var(--activity-cube-stroke-width) no-repeat,
        repeating-linear-gradient(
            90deg,
            var(--activity-cube-stroke-color) 0 var(--activity-cube-dash-length),
            transparent var(--activity-cube-dash-length) calc(var(--activity-cube-dash-length) + var(--activity-cube-dash-gap))
        ) bottom / 100% var(--activity-cube-stroke-width) no-repeat,
        repeating-linear-gradient(
            180deg,
            var(--activity-cube-stroke-color) 0 var(--activity-cube-dash-length),
            transparent var(--activity-cube-dash-length) calc(var(--activity-cube-dash-length) + var(--activity-cube-dash-gap))
        ) left / var(--activity-cube-stroke-width) 100% no-repeat,
        repeating-linear-gradient(
            180deg,
            var(--activity-cube-stroke-color) 0 var(--activity-cube-dash-length),
            transparent var(--activity-cube-dash-length) calc(var(--activity-cube-dash-length) + var(--activity-cube-dash-gap))
        ) right / var(--activity-cube-stroke-width) 100% no-repeat;
}

.activity-cube-face--top {
    transform: translateY(-50%) rotateX(90deg);
}

.activity-cube-face--bottom {
    transform: translateY(50%) rotateX(-90deg);
}

.activity-cube-face--left {
    transform: translateX(-50%) rotateY(-90deg);
}

.activity-cube-face--right {
    transform: translateX(50%) rotateY(90deg);
}

.activity-cube-face--back,
.activity-cube-face--front {
    transform: rotateY(-90deg) translateX(50%) rotateY(90deg);
}

.activity-cube-face.is-rippled {
    --activity-cube-stroke-color: rgba(244, 238, 255, 0.98);
    background: var(--activity-cube-ripple);
    box-shadow: 0 0 16px rgba(221, 208, 255, 0.22);
}

.activity-board {
    position: relative;
    min-height: 560px;
    overflow: hidden;
    border-radius: 38px;
    border: 1px solid rgba(18, 21, 28, 0.08);
    background:
        radial-gradient(circle at top right, rgba(125, 184, 255, 0.28), transparent 34%),
        radial-gradient(circle at bottom left, rgba(156, 228, 214, 0.22), transparent 32%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(240, 244, 250, 0.92) 54%, rgba(234, 239, 246, 0.95));
    box-shadow: var(--home-shadow-strong);
}

.activity-board::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(rgba(18, 21, 28, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(18, 21, 28, 0.05) 1px, transparent 1px);
    background-size: 96px 96px;
    opacity: 0.8;
    pointer-events: none;
}

.activity-board-header,
.activity-board-rows,
.activity-board-footer {
    position: relative;
    z-index: 1;
}

.activity-board-header {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.4rem;
}

.activity-board-pill,
.activity-board-chip,
.activity-overview-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    letter-spacing: 0.04em;
}

.activity-board-pill {
    min-height: 40px;
    padding: 0 1rem;
    color: var(--home-text);
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    background: rgba(255, 255, 255, 0.68);
    border: 1px solid rgba(18, 21, 28, 0.08);
}

.activity-board-rows {
    display: grid;
    gap: 1rem;
    padding: 0 1.4rem;
}

.activity-board-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.activity-board-card,
.activity-overview-panel,
.activity-list-card,
.activity-detail-panel,
.activity-signup-panel,
.result-showcase-card {
    border: 1px solid var(--activity-card-border);
    background: var(--activity-card-bg);
    box-shadow: var(--activity-card-shadow);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.activity-board-card {
    min-height: 124px;
    padding: 1.1rem;
    border-radius: 24px;
}

.activity-board-card span,
.activity-overview-panel span,
.activity-meta-pill,
.activity-list-label,
.activity-list-badge,
.result-showcase-label,
.activity-field-label {
    color: var(--home-muted-soft);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.activity-board-card strong,
.activity-overview-panel strong {
    display: block;
    margin-top: 0.55rem;
    color: var(--home-text);
    font-family: 'Sora', sans-serif;
    font-size: 1.2rem;
    line-height: 1.2;
    letter-spacing: -0.04em;
}

.activity-board-card p,
.activity-overview-panel p {
    margin: 0.55rem 0 0;
    color: var(--home-muted);
    font-size: 0.88rem;
    line-height: 1.6;
}

.activity-board-footer {
    position: absolute;
    left: 1.4rem;
    right: 1.4rem;
    bottom: 1.4rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.9rem;
}

.activity-board-chip {
    min-height: 52px;
    padding: 0 1rem;
    color: var(--home-text);
    font-size: 0.86rem;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.68);
    border: 1px solid rgba(18, 21, 28, 0.08);
}

.activity-list-section {
    padding-top: 4rem;
    padding-bottom: 2.6rem;
}

.activity-section-shell {
    display: grid;
    gap: 1.4rem;
}

.activity-list-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
}

.activity-list-card {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    overflow: hidden;
    border-radius: 30px;
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.activity-list-card:hover {
    transform: translateY(-4px);
    border-color: rgba(18, 21, 28, 0.12);
    box-shadow: 0 24px 50px rgba(16, 22, 35, 0.12);
}

.activity-list-media {
    position: relative;
    min-height: 220px;
    overflow: hidden;
    background:
        radial-gradient(circle at top right, rgba(125, 184, 255, 0.2), transparent 30%),
        linear-gradient(145deg, rgba(247, 250, 255, 0.95), rgba(238, 243, 249, 0.92));
}

.activity-list-media::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(rgba(18, 21, 28, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(18, 21, 28, 0.05) 1px, transparent 1px);
    background-size: 88px 88px;
    opacity: 0.72;
    pointer-events: none;
}

.activity-list-media img {
    position: absolute;
    inset: 1.2rem;
    width: calc(100% - 2.4rem);
    height: calc(100% - 2.4rem);
    object-fit: cover;
    border-radius: 22px;
    border: 1px solid rgba(18, 21, 28, 0.06);
}

.activity-list-badge,
.activity-list-order {
    position: absolute;
    z-index: 1;
    top: 1rem;
    min-height: 36px;
    padding: 0 0.85rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.76);
    border: 1px solid rgba(18, 21, 28, 0.08);
}

.activity-list-badge {
    left: 1rem;
    display: inline-flex;
    align-items: center;
}

.activity-list-order {
    right: 1rem;
    display: inline-flex;
    align-items: center;
    color: var(--home-text);
    font-size: 0.78rem;
    font-weight: 700;
}

.activity-list-body {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 0.9rem;
    padding: 1.35rem 1.35rem 1.5rem;
}

.activity-list-title,
.activity-subsection-title,
.result-showcase-title {
    margin: 0;
    color: var(--home-text);
    font-family: 'Sora', sans-serif;
    letter-spacing: -0.04em;
}

.activity-list-title {
    font-size: 1.55rem;
    line-height: 1.08;
}

.activity-list-summary,
.activity-rich-content,
.activity-result-copy,
.activity-signup-desc,
.activity-signup-note,
.activity-form-status,
.activity-topic-status,
.activity-login-hint,
.activity-empty-state {
    color: var(--home-muted);
    font-size: 0.96rem;
    line-height: 1.8;
}

.activity-list-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.activity-list-meta span,
.activity-signup-notice {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 0.8rem;
    border-radius: 999px;
    color: var(--home-muted);
    font-size: 0.82rem;
    font-weight: 600;
    background: rgba(18, 21, 28, 0.05);
    border: 1px solid rgba(18, 21, 28, 0.06);
}

.activity-list-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: auto;
}

.activity-list-state {
    color: var(--home-muted-soft);
    font-size: 0.88rem;
    font-weight: 700;
}

.activity-list-link,
.result-showcase-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 1rem;
    border-radius: 999px;
    color: #ffffff;
    background: #111111;
    font-size: 0.9rem;
    font-weight: 700;
}

.activity-empty-state {
    padding: 1.6rem;
    border-radius: 28px;
    border: 1px dashed rgba(18, 21, 28, 0.12);
    background: rgba(255, 255, 255, 0.42);
}

.activity-detail-copy {
    max-width: 62rem;
    margin: 0 auto;
    text-align: center;
}

.activity-detail-title {
    margin: 1.3rem 0 0;
    color: var(--home-text);
    font-family: 'Sora', sans-serif;
    font-size: clamp(2.9rem, 6vw, 5.2rem);
    line-height: 0.96;
    letter-spacing: -0.06em;
}

.activity-detail-summary {
    max-width: 42rem;
    margin: 1.2rem auto 0;
    color: var(--home-muted);
    font-size: 1.08rem;
    line-height: 1.8;
}

.activity-meta-pills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem;
    margin-top: 1.5rem;
}

.activity-meta-pill {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0 1rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(18, 21, 28, 0.08);
    color: var(--home-text);
    font-size: 0.82rem;
}

.activity-detail-panels {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 2.2rem;
}

.activity-overview-panel {
    padding: 1.15rem 1.2rem;
    border-radius: 26px;
}

.activity-detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(340px, 0.72fr);
    gap: 1.2rem;
    align-items: start;
}

.activity-detail-panel,
.activity-signup-panel {
    border-radius: 32px;
    padding: 1.5rem;
}

.activity-signup-panel {
    position: sticky;
    top: 112px;
}

.activity-subsection-title {
    font-size: 2rem;
    line-height: 1.02;
}

.activity-rich-content {
    margin-top: 1.2rem;
}

.activity-intro-block + .activity-intro-block {
    margin-top: 1rem;
}

.activity-intro-block-text {
    padding: 1.05rem 1.2rem;
    border-radius: 16px;
    border: 1px solid rgba(18, 21, 28, 0.08);
    background: rgba(255, 255, 255, 0.7);
}

.activity-intro-text-body {
    color: var(--home-muted);
    font-size: 0.96rem;
    line-height: 1.8;
}

.activity-intro-block-image {
    margin: 0;
    padding: 0;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(18, 21, 28, 0.08);
    background: rgba(255, 255, 255, 0.74);
}

.activity-intro-block-image img {
    display: block;
    width: 100%;
    height: auto;
}

.activity-intro-image-caption {
    margin: 0;
    padding: 0.75rem 1rem 0.9rem;
    color: var(--home-muted);
    font-size: 0.88rem;
    line-height: 1.6;
    border-top: 1px solid rgba(18, 21, 28, 0.06);
}

.activity-intro-block.activity-trial-wrap {
    margin-top: 0;
}

.activity-trial-wrap {
    margin-top: 1.2rem;
    --activity-trial-height: 520px;
    padding: 1rem 1rem 1.1rem;
    border-radius: 18px;
    border: 1px dashed rgba(18, 21, 28, 0.16);
    background: linear-gradient(135deg, rgba(248, 250, 255, 0.9), rgba(255, 255, 255, 0.72));
}

.activity-trial-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.8rem;
    padding: 0;
}

.activity-trial-tag {
    color: var(--home-muted);
    font-size: 0.86rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

a.activity-trial-open,
a.activity-trial-open:visited,
a.activity-trial-open:hover,
a.activity-trial-open:active {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 1.1rem;
    border-radius: 999px;
    color: #ffffff !important;
    -webkit-text-fill-color: #ffffff;
    background: #111111;
    font-size: 0.86rem;
    font-weight: 700;
    white-space: nowrap;
    box-shadow: 0 10px 20px rgba(17, 17, 17, 0.16);
}

a.activity-trial-open * {
    color: inherit !important;
}

.activity-trial-frame-wrap {
    margin-top: 0.85rem;
    width: 100%;
    padding: 0.75rem;
    overflow: hidden;
    border-radius: 16px;
    border: 1px solid rgba(18, 21, 28, 0.08);
    background: rgba(255, 255, 255, 0.74);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.activity-trial-frame-wrap iframe {
    display: block;
    width: 100%;
    height: var(--activity-trial-height);
    min-height: var(--activity-trial-height);
    overflow: hidden;
    border: 1px solid rgba(18, 21, 28, 0.08);
    border-radius: 14px;
    background: #f6f7f9;
    box-shadow: 0 12px 30px rgba(16, 22, 35, 0.08);
}

.activity-trial-desc {
    margin: 0.85rem 0 0;
    padding: 0;
    color: var(--home-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

.activity-rich-content p,
.activity-result-copy p {
    margin: 0 0 1rem;
}

.activity-rich-content br + br,
.activity-result-copy br + br {
    display: block;
    content: '';
    margin-top: 0.7rem;
}

.activity-signup-desc {
    margin: 0.5rem 0 0;
}

.activity-signup-notice {
    margin-top: 1.2rem;
}

.activity-login-actions {
    margin-top: 1rem;
}

.activity-upload-card {
    display: grid;
    gap: 1rem;
    margin-top: 1.2rem;
    padding: 1rem;
    border-radius: 22px;
    border: 1px solid rgba(18, 21, 28, 0.08);
    background: rgba(255, 255, 255, 0.62);
}

.activity-upload-card-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
}

.activity-upload-card-title {
    margin: 0.25rem 0 0;
    color: var(--home-text);
    font-size: 1.2rem;
    font-weight: 800;
}

.activity-upload-card-desc,
.activity-upload-history-note {
    margin: 0.45rem 0 0;
    color: var(--home-muted);
    font-size: 0.92rem;
    line-height: 1.7;
}

.activity-upload-alert,
.activity-upload-history-note {
    color: #b72d2d;
    font-weight: 800;
}

.activity-upload-history {
    display: grid;
    gap: 0.8rem;
}

.activity-upload-history-item {
    display: grid;
    gap: 0.65rem;
    padding: 0.9rem 0.95rem;
    border: 1px solid rgba(18, 21, 28, 0.08);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.72);
}

.activity-upload-history-top,
.activity-upload-history-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem;
}

.activity-upload-history-name {
    color: var(--home-ink);
    font-weight: 700;
    word-break: break-all;
}

.activity-upload-history-link {
    text-decoration: none;
}

.activity-login-button,
.activity-submit-button {
    min-height: 48px;
    padding: 0 1.4rem;
}

.activity-form {
    margin-top: 1.5rem;
}

.activity-form-stack,
.activity-topic-wrap {
    display: grid;
    gap: 1rem;
}

.activity-form-field {
    display: grid;
    gap: 0.55rem;
}

.activity-field-label {
    color: var(--home-text);
    text-transform: none;
    letter-spacing: 0;
    font-size: 0.92rem;
}

.activity-field-required {
    color: #d05d4e;
}

.activity-input,
.activity-select,
.activity-textarea {
    width: 100%;
    border: 1px solid rgba(18, 21, 28, 0.08);
    border-radius: 18px;
    padding: 0.9rem 1rem;
    color: var(--home-text);
    background: rgba(255, 255, 255, 0.72);
    outline: none;
    transition: border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.activity-input::placeholder,
.activity-textarea::placeholder {
    color: #9298a4;
}

.activity-input:focus,
.activity-select:focus,
.activity-textarea:focus {
    border-color: rgba(29, 95, 255, 0.32);
    box-shadow: 0 0 0 4px rgba(29, 95, 255, 0.08);
    background: rgba(255, 255, 255, 0.9);
}

.activity-textarea {
    min-height: 132px;
    resize: vertical;
}

.activity-checkbox-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.activity-checkbox-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 0.9rem;
    border-radius: 16px;
    border: 1px solid rgba(18, 21, 28, 0.08);
    background: rgba(255, 255, 255, 0.64);
    color: var(--home-text);
    font-size: 0.9rem;
}

.activity-checkbox-chip input {
    accent-color: #111111;
}

.activity-topic-chips {
    display: flex;
    gap: 0.7rem;
    overflow-x: auto;
    padding-bottom: 0.2rem;
}

.activity-topic-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 1rem;
    border-radius: 999px;
    color: var(--home-text);
    background: rgba(255, 255, 255, 0.64);
    border: 1px solid rgba(18, 21, 28, 0.08);
    font-size: 0.88rem;
    font-weight: 700;
    white-space: nowrap;
    transition: transform 160ms ease, background-color 160ms ease, color 160ms ease;
}

.activity-topic-chip.is-active {
    color: #ffffff;
    background: #111111;
}

.activity-topic-status,
.activity-form-status,
.activity-login-hint,
.activity-signup-action-hint {
    min-height: 1.4rem;
    margin-top: 0.25rem;
    font-size: 0.88rem;
}

.activity-form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    align-items: center;
    margin-top: 1rem;
}

.activity-secondary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 1.1rem;
    border-radius: 999px;
    border: 1px solid rgba(18, 21, 28, 0.1);
    background: rgba(255, 255, 255, 0.82);
    color: var(--home-text);
    font-size: 0.92rem;
    font-weight: 700;
    transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.activity-secondary-button:hover {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.96);
}

.activity-danger-button {
    border-color: rgba(190, 57, 57, 0.18);
    background: rgba(255, 241, 241, 0.88);
    color: #b72d2d;
}

.activity-danger-button:hover {
    background: rgba(255, 233, 233, 0.98);
}

.activity-signup-action-hint {
    color: var(--activity-muted);
}

.activity-signup-action-hint.is-danger,
.activity-form-status.is-danger {
    color: #b72d2d;
    font-weight: 700;
}

.activity-topic-chip[disabled],
.activity-secondary-button[disabled] {
    opacity: 0.58;
    cursor: not-allowed;
    transform: none;
}

.activity-form-actions .button-primary[disabled],
.activity-rating-submit[disabled] {
    opacity: 0.58;
    cursor: not-allowed;
}

.activity-result-head {
    margin-bottom: 1.8rem;
}

.activity-result-copy {
    max-width: 52rem;
}

.result-gallery-shell {
    overflow: visible;
}

.result-gallery-track {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
    align-items: start;
    padding: 0.35rem 0 0.8rem;
}

.result-showcase-card {
    min-width: 0;
    overflow: hidden;
    border-radius: 28px;
}

.result-showcase-link {
    display: flex;
    flex-direction: column;
    min-height: 100%;
}

.result-showcase-thumb {
    position: relative;
    min-height: 260px;
    overflow: hidden;
    background: linear-gradient(145deg, rgba(247, 250, 255, 0.95), rgba(238, 243, 249, 0.92));
}

.result-showcase-thumb img {
    position: absolute;
    inset: 1rem;
    width: calc(100% - 2rem);
    height: calc(100% - 2rem);
    object-fit: cover;
    border-radius: 22px;
    border: 1px solid rgba(18, 21, 28, 0.06);
}

.result-showcase-body {
    display: grid;
    gap: 0.8rem;
    padding: 1.15rem 1.2rem 1.3rem;
}

.result-showcase-card > .result-showcase-body {
    border-top: 1px solid rgba(18, 21, 28, 0.06);
    background: rgba(255, 255, 255, 0.58);
}

.result-showcase-title {
    font-size: 1.4rem;
    line-height: 1.1;
}

.result-showcase-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.8rem;
    margin-top: 0.2rem;
}

.result-showcase-meta {
    margin: -0.2rem 0 0;
    color: var(--home-muted);
    font-size: 0.92rem;
    line-height: 1.5;
}

.result-showcase-note {
    color: var(--home-muted-soft);
    font-size: 0.84rem;
    font-weight: 600;
}

.activity-rating-shell {
    display: grid;
    gap: 0.7rem;
    margin-top: 0.2rem;
}

.activity-rating-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.8rem;
}

.activity-rating-summary {
    color: var(--home-muted);
    font-size: 0.8rem;
    line-height: 1.6;
}

.activity-rating-submit {
    min-height: 34px;
    padding: 0 0.9rem;
    border-radius: 999px;
    border: 1px solid rgba(18, 21, 28, 0.08);
    color: var(--home-text);
    background: rgba(18, 21, 28, 0.05);
    font-size: 0.82rem;
    font-weight: 700;
}

.activity-stars {
    display: flex;
    gap: 0.1rem;
}

.activity-star {
    padding: 0;
    border: none;
    background: transparent;
    font-size: 1.2rem;
    line-height: 1;
    color: #b5bbc6;
}

.activity-star.is-active {
    color: #f0b949;
}

.activity-star[disabled] {
    opacity: 0.58;
}

.activity-rating-status {
    color: var(--home-muted);
    font-size: 0.82rem;
    min-height: 1.2rem;
}

@media (max-width: 1279px) {
    .activity-list-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .result-gallery-track {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 1024px) {
    .activity-overview-shell,
    .activity-detail-grid,
    .activity-detail-panels {
        grid-template-columns: 1fr;
    }

    .result-gallery-track {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .activity-board {
        min-height: 500px;
    }

    .activity-cubes-panel {
        min-height: 560px;
    }

    .activity-board-row,
    .activity-board-footer {
        grid-template-columns: 1fr;
    }

    .activity-signup-panel {
        position: static;
    }
}

@media (max-width: 768px) {
    .activity-overview-hero,
    .activity-detail-hero {
        padding-top: 132px;
        padding-bottom: 3.2rem;
    }

    .activity-list-grid {
        grid-template-columns: 1fr;
    }

    .activity-board {
        min-height: auto;
    }

    .activity-cubes-panel {
        min-height: 440px;
        border-radius: 30px;
    }

    .activity-cubes-scene {
        width: min(90%, 420px);
    }

    .activity-board-header,
    .activity-board-rows,
    .activity-board-footer {
        position: relative;
    }

    .activity-board-footer {
        left: auto;
        right: auto;
        bottom: auto;
        padding: 1rem 1.4rem 1.4rem;
    }

    .activity-detail-title {
        font-size: clamp(2.4rem, 14vw, 4rem);
    }

    .activity-detail-panel,
    .activity-signup-panel,
    .result-showcase-card,
    .activity-list-card {
        border-radius: 24px;
    }

    .result-gallery-track {
        grid-template-columns: 1fr;
    }

    .activity-trial-wrap {
        padding: 0.9rem 0.9rem 1rem;
    }

    .activity-trial-head {
        align-items: flex-start;
        flex-direction: column;
    }

    .activity-trial-frame-wrap {
        padding: 0.55rem;
    }

}

@media (prefers-reduced-motion: reduce) {
    .activity-list-card,
    .activity-topic-chip {
        transition: none;
    }
}

.activity-upload-float {
    position: fixed;
    right: clamp(1rem, 3vw, 2rem);
    bottom: clamp(1rem, 3vw, 2rem);
    z-index: 80;
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    min-height: 3.25rem;
    padding: 0 1.25rem;
    border: 0;
    border-radius: 999px;
    background: #111318;
    color: #fff;
    font-weight: 800;
    box-shadow: 0 18px 45px rgba(17, 19, 24, 0.26);
    cursor: pointer;
}

.activity-upload-float-icon {
    display: grid;
    place-items: center;
    width: 1.55rem;
    height: 1.55rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
    line-height: 1;
}

.activity-upload-modal {
    position: fixed;
    inset: 0;
    z-index: 120;
    display: grid;
    place-items: center;
    padding: 1.25rem;
}

.activity-upload-modal.hidden {
    display: none;
}

.activity-upload-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(17, 19, 24, 0.45);
    backdrop-filter: blur(8px);
}

.activity-upload-panel {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 1rem;
    width: min(920px, 100%);
    max-height: min(760px, calc(100vh - 2.5rem));
    overflow: auto;
    padding: clamp(1.1rem, 3vw, 1.6rem);
    border: 1px solid rgba(18, 21, 28, 0.08);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 28px 70px rgba(17, 19, 24, 0.24);
}

.activity-upload-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
}

.activity-upload-head h2 {
    margin: 0.2rem 0 0;
    color: var(--home-ink);
    font-size: clamp(1.45rem, 3vw, 2.1rem);
    font-weight: 800;
}

.activity-upload-head p,
.activity-upload-status {
    color: var(--home-muted);
    line-height: 1.7;
}

.activity-upload-head p.activity-upload-alert {
    color: #b72d2d;
    font-weight: 800;
}

.activity-upload-close {
    display: grid;
    place-items: center;
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid rgba(18, 21, 28, 0.1);
    border-radius: 999px;
    background: #fff;
    color: var(--home-ink);
    font-size: 1.5rem;
    cursor: pointer;
}

.activity-upload-field {
    display: grid;
    gap: 0.45rem;
    color: var(--home-muted);
    font-size: 0.92rem;
    font-weight: 700;
}

.activity-upload-input {
    width: 100%;
    min-height: 3rem;
    padding: 0 1rem;
    border: 1px solid rgba(18, 21, 28, 0.1);
    border-radius: 16px;
    background: #fff;
    color: var(--home-ink);
    outline: none;
}

.activity-upload-actions,
.activity-upload-item-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.7rem;
}

.activity-upload-list {
    display: grid;
    gap: 0.8rem;
}

.activity-upload-selections {
    display: grid;
    gap: 0.9rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.activity-upload-selections.hidden {
    display: none;
}

.activity-upload-empty {
    display: grid;
    place-items: center;
    min-height: 150px;
    padding: 1rem;
    border: 1px dashed rgba(18, 21, 28, 0.14);
    border-radius: 18px;
    color: var(--home-muted);
    text-align: center;
}

.activity-upload-item {
    display: grid;
    gap: 0.75rem;
    padding: 1rem;
    border: 1px solid rgba(18, 21, 28, 0.08);
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.92);
}

.activity-upload-item-main {
    display: grid;
    gap: 0.45rem;
    min-width: 0;
}

.activity-upload-item-main strong {
    color: var(--home-ink);
    word-break: break-all;
}

.activity-upload-item-main code {
    display: block;
    padding: 0.65rem 0.75rem;
    border-radius: 12px;
    background: rgba(18, 21, 28, 0.06);
    color: var(--home-ink);
    white-space: normal;
    word-break: break-all;
}

.activity-upload-chip {
    display: inline-flex;
    align-items: center;
    min-height: 2.35rem;
    padding: 0 0.8rem;
    border-radius: 999px;
    background: rgba(18, 21, 28, 0.06);
    color: var(--home-muted);
    font-size: 0.88rem;
    font-weight: 700;
}

.activity-upload-link {
    text-decoration: none;
}

.upload-tree {
    display: grid;
    gap: 0.8rem;
}

.upload-tree-folder {
    border: 1px solid rgba(18, 21, 28, 0.08);
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.92);
    overflow: hidden;
}

.upload-tree-folder-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.95rem 1rem;
    cursor: pointer;
    list-style: none;
}

.upload-tree-folder-summary::-webkit-details-marker {
    display: none;
}

.upload-tree-folder-title,
.upload-tree-folder-side {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    min-width: 0;
}

.upload-tree-folder-side {
    justify-content: flex-end;
    flex-wrap: wrap;
}

.upload-tree-folder-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.35rem;
    color: var(--home-muted);
    font-size: 0.95rem;
    transition: transform 0.18s ease;
    transform-origin: center;
}

.upload-tree-folder:not([open]) .upload-tree-folder-toggle {
    transform: rotate(-90deg);
}

.upload-tree-folder-name {
    color: var(--home-ink);
    font-weight: 700;
    word-break: break-all;
}

.upload-tree-folder-hint,
.upload-tree-folder-meta {
    color: var(--home-muted);
    font-size: 0.86rem;
}

.upload-tree-folder-hint {
    opacity: 0.85;
}

.upload-tree-folder-meta {
    white-space: nowrap;
}

.upload-tree-children {
    display: grid;
    gap: 0.75rem;
    padding: 0 0.95rem 0.95rem 1.35rem;
    margin-left: 0.8rem;
    border-left: 1px dashed rgba(18, 21, 28, 0.12);
}

.upload-tree-file {
    display: grid;
    gap: 0.7rem;
    padding: 0.9rem 0.95rem;
    border: 1px solid rgba(18, 21, 28, 0.08);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.72);
}

.upload-tree-file-main {
    min-width: 0;
}

.upload-tree-file-name {
    color: var(--home-ink);
    word-break: break-all;
}

.upload-tree-file-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem;
}

.upload-tree-chip {
    display: inline-flex;
    align-items: center;
    min-height: 2.35rem;
    padding: 0 0.8rem;
    border-radius: 999px;
    background: rgba(18, 21, 28, 0.06);
    color: var(--home-muted);
    font-size: 0.88rem;
    font-weight: 700;
}

.activity-upload-modal-open {
    overflow: hidden;
}

@media (max-width: 640px) {
    .activity-upload-float {
        right: 1rem;
        bottom: 1rem;
    }

    .activity-upload-panel {
        border-radius: 20px;
    }

    .activity-upload-head {
        align-items: stretch;
    }
}