/* intro v29 — Rolls-Royce thread: circle-expand reveal, half-ring, chat alignment, dual-layer parallax */

.intro-thread { min-height: 88vh; }

/* Clip-path circle expand from centre on load */
.intro-thread__reveal {
    animation: intro-thread-expand 900ms ease forwards;
}
@keyframes intro-thread-expand {
    from { clip-path: circle(0% at 50% 50%); }
    to   { clip-path: circle(150% at 50% 50%); }
}

/* Half-ring at the boundary (fixed size — no BS w-N/h-N utility) */
.intro-thread__half {
    width: 16rem;
    height: 8rem;
    opacity: 0.7;
    filter: blur(2px);
}
.intro-thread__sun { width: 6rem; height: 6rem; }
.intro-thread [data-msg] { max-width: 28rem; }

/* Dual-layer parallax offset (set by JS via custom props) */
.intro-thread__island [data-layer] {
    transition: transform 200ms ease-out;
    transform: translate(var(--px, 0), var(--py, 0));
}

/* Chat thread alternate alignment + retro corner tails */
.intro-thread [data-msg] { border-bottom-left-radius: 0.25rem; }
.intro-thread [data-msg]:nth-child(even) {
    margin-left: auto;
    border-bottom-left-radius: 1rem;
    border-bottom-right-radius: 0.25rem;
}

@media (prefers-reduced-motion: reduce) {
    .intro-thread__reveal { animation: none; }
    .intro-thread__island [data-layer] { transition: none; }
}

/* Card hover: scale */
.portfolio-item-hover {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.portfolio-item-hover:hover {
    transform: scale(1.05);
}

/* Image: zoom on card hover */
.portfolio-item-hover .portfolio-img-hover {
    transition: transform 0.5s ease;
}
.portfolio-item-hover:hover .portfolio-img-hover {
    transform: scale(1.05);
}

/* Gradient overlay: fade in on card hover */
.portfolio-overlay-hover {
    opacity: 0;
    transition: opacity 0.3s ease;
}
.portfolio-item-hover:hover .portfolio-overlay-hover {
    opacity: 1;
}

.spotlight-carousel-quote__portrait {
    width: 5rem;
    height: 5rem;
}

/* 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;
    }
}


.invite-boost__section {
    padding-top: 6rem;
    padding-bottom: 6rem;
}

@keyframes invite-boost-flare-throb-cycle {
    0%, 100% { opacity: 1; }
    50%       { opacity: .5; }
}
.invite-boost__flare--throb {
    animation: invite-boost-flare-throb-cycle 2s cubic-bezier(.4,0,.6,1) infinite;
}

@keyframes invite-boost-flare-rebound-cycle {
    0%, 100% { transform: translateY(0); animation-timing-function: cubic-bezier(.8,0,1,1); }
    50%       { transform: translateY(-25%); animation-timing-function: cubic-bezier(0,0,.2,1); }
}
.invite-boost__flare--rebound {
    animation: invite-boost-flare-rebound-cycle 1s infinite;
}

@keyframes invite-boost-flare-ping-cycle {
    75%, 100% { transform: scale(2); opacity: 0; }
}
.invite-boost__flare--ping {
    animation: invite-boost-flare-ping-cycle 1s cubic-bezier(0,0,.2,1) infinite;
}

@keyframes invite-boost-stroke-throb-cycle {
    0%, 100% { opacity: 1; }
    50%       { opacity: .5; }
}
.invite-boost__stroke--throb {
    animation: invite-boost-stroke-throb-cycle 2s cubic-bezier(.4,0,.6,1) infinite;
}

.invite-boost__layer--lift:hover { transform: scale(1.05); transition: transform .2s ease; }

.invite-boost__flare--lift:hover { transform: scale(1.25); transition: transform .2s ease; }

.invite-boost__action--lift:hover { transform: scale(1.05); transition: transform .2s ease; }