/* 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; }
}

/* FAQ v4 — collapsed panel (no display:none: scrollHeight must be measurable after class toggle) */
.support-qna-content-veiled {
    max-height: 0 !important;
    overflow: hidden;
    opacity: 0;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
    pointer-events: none;
}

/* Thumb sizes */
.support-qna__thumb-md { width: 2.5rem; height: 2.5rem; }
.support-qna__thumb-sm { width: 2rem; height: 2rem; }

/* Corner blob sizes */
.support-qna__corner-blob-lg { width: 8rem; height: 8rem; }
.support-qna__corner-blob-md { width: 6rem; height: 6rem; }

/* Dot positions */
.support-qna__dot-a { top: 6rem; left: 33%; width: 0.75rem; height: 0.75rem; }
.support-qna__dot-b { top: 10rem; right: 33%; width: 0.5rem; height: 0.5rem; }
.support-qna__dot-c { bottom: 8rem; left: 50%; width: 1rem; height: 1rem; }

/* Stripe positions for gradient bands */
.support-qna__stripe-top { height: 8rem; }
.support-qna__stripe-mid { top: 4rem; height: 6rem; }

/* Blob positions */
.support-qna__blob-a { top: 5rem; left: 3rem; width: 4rem; height: 4rem; }
.support-qna__blob-b { top: 8rem; right: 4rem; width: 3rem; height: 3rem; }
.support-qna__blob-c { bottom: 6rem; left: 25%; width: 5rem; height: 5rem; }

/* Animation delays */
.support-qna__ornament--delay-2 { animation-delay: 0.5s; }
.support-qna__ornament--delay-3 { animation-delay: 0.8s; }
.support-qna__ornament--delay-4 { animation-delay: 1s; }
.support-qna__ornament--delay-5 { animation-delay: 1.2s; }
.support-qna__ornament--delay-6 { animation-delay: 1.5s; }
.support-qna__ornament--delay-7 { animation-delay: 2s; }

@keyframes support-qna-ornament-beat-cycle {
    0%, 100% { opacity: 1; }
    50%       { opacity: .5; }
}
.support-qna__ornament--beat {
    animation: support-qna-ornament-beat-cycle 2s cubic-bezier(.4,0,.6,1) infinite;
}

@keyframes support-qna-ornament-spring-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); }
}
.support-qna__ornament--spring {
    animation: support-qna-ornament-spring-cycle 1s infinite;
}

@keyframes support-qna-ornament-wave-cycle {
    75%, 100% { transform: scale(2); opacity: 0; }
}
.support-qna__ornament--wave {
    animation: support-qna-ornament-wave-cycle 1s cubic-bezier(0,0,.2,1) infinite;
}

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

.support-qna__mark--lift:hover { transform: scale(1.1); transition: transform .2s ease; }

.content-img-ratio {
    display: block;
    width: 100%;
    height: 100%;
    min-width: 0;
    object-fit: cover;
    flex-shrink: 0;
}

.briefing-chapter__column-inset {
    padding: 4rem;
}