/* intro v24 — Arctic scandinavian: orbit animation, blur-in reveal, colour-invert hover */

/* Orbit circle animation */
.intro-arc__orbit {
    width: 20rem;
    height: 20rem;
    animation: intro-arc-orbit 20s linear infinite;
}
.intro-arc__dot { width: 1rem; height: 1rem; margin-left: -0.5rem; }
@keyframes intro-arc-orbit {
    to { transform: rotate(360deg); }
}

/* Blur-in — hidden only once JS arms it (no-JS content stays visible) */
.intro-arc.is-armed .intro-arc__blur {
    filter: blur(8px);
    opacity: 0;
    transition: filter 560ms ease, opacity 560ms ease;
}
.intro-arc.is-armed .intro-arc__blur.is-in {
    filter: blur(0);
    opacity: 1;
}

/* Colour invert on hover: descendants inherit the row's hover text colour (keyword only, no colour value) */
.intro-arc__row:hover * {
    color: inherit;
}

@media (prefers-reduced-motion: reduce) {
    .intro-arc__orbit { animation: none; }
    .intro-arc__blur { filter: none; opacity: 1; }
}

@keyframes perks-ring-progress-pulse-kf {
    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.6;
        transform: scale(1.05);
    }
}

.perks-ring-progress__blob {
    animation: perks-ring-progress-pulse-kf 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.perks-ring-progress__blob--delay {
    animation-delay: 1s;
}

@keyframes perks-ring-progress-spin-kf {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.perks-ring-progress__orbit--a {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 5rem;
    height: 5rem;
    animation: perks-ring-progress-spin-kf 20s linear infinite;
}

.perks-ring-progress__orbit--b {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    width: 4rem;
    height: 4rem;
    animation: perks-ring-progress-spin-kf 15s linear infinite reverse;
}

.perks-ring-progress__blob.perks-ring-progress__blob--a {
    position: absolute;
    width: 16rem;
    height: 16rem;
    top: 25%;
    left: 25%;
    filter: blur(64px);
}

.perks-ring-progress__blob.perks-ring-progress__blob--b {
    position: absolute;
    width: 20rem;
    height: 20rem;
    bottom: 25%;
    right: 25%;
    filter: blur(64px);
}

.perks-ring-progress__thumb {
    width: 4rem;
    height: 4rem;
}

.perks-ring-progress__ring-wrap {
    width: 5rem;
    height: 5rem;
}

.perks-ring-progress__decor-layer {
    transition: opacity 0.5s ease;
}

.perks-ring-progress__accent-line {
    height: 4px;
    transition: opacity 0.5s ease;
}

@media (min-width: 640px) {
    .perks-ring-progress__group:hover .perks-ring-progress__card {
        transform: scale(1.05);
    }

    .perks-ring-progress__group:hover .perks-ring-progress__thumb {
        transform: rotate(12deg);
    }
}

.perks-ring-progress__group:hover .perks-ring-progress__decor-layer {
    opacity: 0.1;
}

.perks-ring-progress__group:hover .perks-ring-progress__accent-line {
    opacity: 1;
}

/* quote — featured academic quote + supporting cards */

/* serif lead + drop-cap. BS has no font-serif utility; font-family here is allowed (it is not a color) */
.quote-essay__lead {
    font-family: ui-serif, Georgia, "Times New Roman", serif;
}

.quote-essay__lead::first-letter {
    float: left;
    font-size: 3.25rem;
    line-height: 0.8;
    padding-right: 0.5rem;
    font-weight: 700;
}

/* author avatar: fixed size + cover (neither has a BS utility) */
.quote-essay__avatar {
    width: 3.5rem;
    height: 3.5rem;
    object-fit: cover;
}

.quote-essay__glow {
    width: 16rem;
    height: 16rem;
    filter: blur(64px);
}

/* stepping-stone offset rhythm on supporting cards — layout only */
@media (min-width: 1024px) {
    .quote-essay__step:nth-child(odd) {
        transform: translateY(0.75rem);
    }
    .quote-essay__step:nth-child(even) {
        transform: translateY(-0.25rem);
    }
}
/* hover + focus affordances (layout/outline via theme token) */
@media (hover: hover) {
    .quote-essay-root [role="listitem"]:hover,
    .quote-essay-root article:hover,
    .quote-essay-root [class*="quote-essay__card"]:hover,
    .quote-essay-root .quote-essay__book:hover,
    .quote-essay-root .quote-essay__step:hover,
    .quote-essay-root .quote-essay__index-card:hover,
    .quote-essay-root .quote-essay__pill:hover,
    .quote-essay-root .quote-essay__item:hover {
        transform: translateY(-0.125rem);
    }
}

.quote-essay-root [role="listitem"],
.quote-essay-root article,
.quote-essay-root [class*="quote-essay__card"],
.quote-essay-root .quote-essay__book,
.quote-essay-root .quote-essay__step,
.quote-essay-root .quote-essay__index-card,
.quote-essay-root .quote-essay__pill {
    transition: transform 200ms ease;
}

.quote-essay-root a:focus-visible,
.quote-essay-root button:focus-visible,
.quote-essay-root [tabindex="0"]:focus-visible,
.quote-essay-root input:focus-visible,
.quote-essay-root summary:focus-visible,
.quote-essay-root [role="slider"]:focus-visible {
    outline: 2px solid var(--bs-primary);
    outline-offset: 2px;
}

@media (hover: hover) {
    .quote-essay-root button:hover,
    .quote-essay-root a:hover,
    .quote-essay-root summary:hover {
        opacity: 0.92;
    }
}