.perspective-masthead-rule {
    border-top: 4px solid var(--bs-body-color);
    border-bottom: 4px solid var(--bs-body-color);
}

.perspective-title-rule {
    border-bottom: 2px solid var(--bs-body-color);
}

.perspective-quote-frame {
    border-top: 1px solid rgba(var(--bs-emphasis-color-rgb), 0.2);
    border-bottom: 1px solid rgba(var(--bs-emphasis-color-rgb), 0.2);
    border-left: 4px solid var(--bs-primary);
}

.perspective-headline-hover {
    transition: color 0.2s ease;
}

.perspective-headline-hover:hover {
    color: var(--bs-primary);
}

.perspective-micro-label {
    font-size: 0.6rem;
    letter-spacing: 0.15em;
}

.perspective-byline-suffix {
    font-size: 0.6rem;
    opacity: 0.6;
}

.perspective-quote-text {
    font-size: 1.1rem;
}

.perspective-card-desc {
    font-size: 0.875rem;
}

/* values v13 — accordion chevron rotation, CSS-only via details[open] */
.values-notion-stack__chevron {
    transition: transform 200ms ease;
}

details.values-notion-stack__summary,
details > .values-notion-stack__summary {
    /* no-op selector kept for clarity; actual toggle target is the chevron below */
}

details[open] > .values-notion-stack__summary .values-notion-stack__chevron,
details[open] .values-notion-stack__chevron {
    transform: rotate(180deg);
}

.values-notion-stack__summary {
    -webkit-tap-highlight-color: transparent;
}

.values-notion-stack__summary::-webkit-details-marker {
    display: none;
}

.values-notion-stack__idx {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    letter-spacing: 0.05em;
}

.values-notion-stack__index-num {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.timeline-emblem {
    width: 5rem;
    height: 5rem;
}

.timeline-spark {
    width: 0.75rem;
    height: 0.75rem;
}

.timeline-cloud-left {
    width: 16rem;
    height: 16rem;
}

.timeline-cloud-right {
    width: 20rem;
    height: 20rem;
    animation-delay: 1s;
}

.timeline-cloud-center {
    width: 24rem;
    height: 24rem;
    animation-delay: 2s;
}

.timeline-outline-square {
    width: 5rem;
    height: 5rem;
    animation-duration: 3s;
}

.timeline-outline-orb {
    width: 4rem;
    height: 4rem;
    animation-duration: 4s;
    animation-delay: 1s;
}

.timeline-halo-start {
    width: 8rem;
    height: 8rem;
    animation-duration: 20s;
}

.timeline-halo-end {
    width: 10rem;
    height: 10rem;
    animation-duration: 25s;
    animation-direction: reverse;
}

.timeline-spark-side {
    animation-delay: 0.5s;
}

.timeline-spark-center {
    animation-delay: 1s;
}

.timeline-cloud-left,
.timeline-cloud-right,
.timeline-cloud-center {
    animation-name: timeline-cloud__pulse;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
}

.timeline-outline-square,
.timeline-outline-orb {
    animation-name: timeline-outline__bounce;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
}

.timeline-halo-start,
.timeline-halo-end {
    animation-name: timeline-halo__spin;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}

.timeline-spark-top,
.timeline-spark-side,
.timeline-spark-center {
    animation-name: timeline-spark__ping;
    animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
    animation-iteration-count: infinite;
}

@keyframes timeline-cloud__pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes timeline-outline__bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-25%); }
}

@keyframes timeline-halo__spin {
    to { transform: rotate(360deg); }
}

@keyframes timeline-spark__ping {
    0% { transform: scale(1); opacity: 1; }
    75%, 100% { transform: scale(2); opacity: 0; }
}

.classic-rail-timeline__line {
    width: 2px;
    left: 2rem;
}

@media (min-width: 768px) {
    .classic-rail-timeline__line {
        left: 50%;
        transform: translateX(-50%);
    }
}

.classic-rail-timeline__dot {
    width: 1rem;
    height: 1rem;
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

@media (min-width: 768px) {
    .classic-rail-timeline__dot {
        left: 50%;
        transform: translate(-50%, -50%);
    }
}

.classic-rail-timeline__content {
    margin-left: 5rem;
}

@media (min-width: 768px) {
    .classic-rail-timeline__content {
        margin-left: 0;
        width: 50%;
    }

    .classic-rail-timeline__content--start {
        padding-right: 2.5rem;
    }

    .classic-rail-timeline__content--end {
        padding-left: 2.5rem;
    }

    .classic-rail-timeline__row--reverse {
        flex-direction: row-reverse;
    }
}