/* intro v17 — Death Note noir: circuit band, pulse rings, extrude text, duotone media, scroll slide-in */

/* Circuit-board traces — colour via Tailwind text-* on the band, currentColor in the pattern */
.intro-noir__circuit {
    background-image:
        repeating-linear-gradient(0deg, currentColor 0 1px, transparent 1px 32px),
        repeating-linear-gradient(90deg, currentColor 0 1px, transparent 1px 32px);
    opacity: 0.18;
    -webkit-mask: linear-gradient(180deg, black, transparent);
    mask: linear-gradient(180deg, black, transparent);
}

/* Pulse rings from the band centre (size + placement so Bootstrap has no utility gap) */
.intro-noir__ring {
    width: 6rem;
    height: 6rem;
    top: 6rem;
    left: 50%;
    margin-left: -3rem;
    opacity: 0;
    animation: intro-noir-pulse 3.4s ease-out infinite;
}
.intro-noir__ring--2 { animation-delay: 1.7s; }

@keyframes intro-noir-pulse {
    0%   { transform: scale(0.4); opacity: 0.55; }
    100% { transform: scale(3.4); opacity: 0; }
}

/* Emboss seal circle */
.intro-noir__seal {
    width: 7rem;
    height: 7rem;
    font-size: 0.75rem;
    line-height: 1.1;
    padding: 0.75rem;
    transform: rotate(-8deg);
}

/* Extrude — stacked text-shadow depth using the element's own colour */
.intro-noir__extrude {
    text-shadow: 1px 1px 0 currentColor, 2px 2px 0 currentColor, 3px 3px 0 currentColor;
}

/* Duotone media: grayscale image + primary multiply tint (colour is a Tailwind class) */
.intro-noir__img {
    height: 10rem;
    object-fit: cover;
    filter: grayscale(1) contrast(1.05);
}

/* Sticky aside offset (Bootstrap position-sticky has no top-16 utility) */
@media (min-width: 992px) {
    .intro-noir__aside { top: 4rem; }
}
.intro-noir__tint {
    mix-blend-mode: multiply;
    opacity: 0.5;
}

/* Letter-spacing widen on hover */
.intro-noir__ttl { transition: letter-spacing 260ms ease; }
[data-card]:hover .intro-noir__ttl { letter-spacing: 0.08em; }

/* Slide-in entrance — pure CSS on the reliable [data-card] attribute; always ends visible */
@keyframes intro-noir-rise {
    from { opacity: 0; transform: translateY(2rem); }
    to   { opacity: 1; transform: translateY(0); }
}
.intro-noir [data-card] { animation: intro-noir-rise 560ms ease both; }

@media (prefers-reduced-motion: reduce) {
    .intro-noir__ring { animation: none; }
    .intro-noir [data-card] { animation: none; }
}

.feature-card-surface {
    position: relative;
    isolation: isolate;
    background: transparent !important;
    border-color: transparent !important;
    box-shadow: none !important;
}

.feature-card-surface > * {
    position: relative;
    z-index: 1;
}

.feature-card-surface::before {
    content: "";
    position: absolute;
    inset: calc(var(--bs-gutter-y, 1rem) * 0.5) calc(var(--bs-gutter-x, 1.5rem) * 0.5);
    border-radius: inherit;
    background: var(--bs-body-bg);
    border: 1px solid var(--bs-border-color-translucent);
    box-shadow: var(--bs-box-shadow-sm);
    z-index: 0;
    transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}

.feature-card-surface:hover:before {
    box-shadow: var(--bs-box-shadow-lg);
    border-color: rgba(var(--bs-primary-rgb), 0.3);
}

/* -- Feature card hover -- */
.feat-card-hover {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.feat-card-hover:hover {
    transform: translateY(-3px);
    box-shadow: 0 0.5rem 1.5rem rgba(0,0,0,.12) !important;
}

/* -- Icon box sizing -- */
.feat-icon-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    min-width: 2.5rem;
    min-height: 2.5rem;
}
.feat-icon-box--lg {
    width: 4rem;
    height: 4rem;
    border-radius: 0.75rem;
}
.feat-icon-box--xl {
    width: 5rem;
    height: 5rem;
    border-radius: 1rem;
}
.feat-icon-box--circle {
    border-radius: 50%;
}

/* -- Nav/filmstrip button hover -- */
.feat-btn-nav {
    transition: transform 0.15s ease, background-color 0.15s ease;
}
.feat-btn-nav:hover {
    transform: scale(1.1);
}

/* -- Table row hover -- */
.feat-table-row-hover {
    transition: background-color 0.15s ease;
}
.feat-table-row-hover:hover {
    background-color: var(--bs-primary-bg-subtle) !important;
}

/* -- Accordion item hover -- */
.feat-accordion-hover summary:hover {
    background-color: var(--bs-primary-bg-subtle);
    border-radius: 0.75rem;
}

/* -- DL item hover -- */
.feat-dl-item-hover {
    transition: background-color 0.15s ease;
    border-radius: 0.5rem;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
}
.feat-dl-item-hover:hover {
    background-color: var(--bs-primary-bg-subtle);
}

/* -- Deck button hover -- */
.feat-deck-btn {
    transition: filter 0.2s ease, transform 0.15s ease;
}
.feat-deck-btn:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}
.card-stack__accent--1 { width: 10rem; height: 10rem; filter: blur(2rem); }
.card-stack__accent--2 { width: 12rem; height: 12rem; filter: blur(2rem); }
.card-stack__accent--3 { width: 8rem; height: 8rem; filter: blur(1.5rem); }
.card-stack__accent--4 { width: 9rem; height: 9rem; filter: blur(2rem); }

.card-stack__title-line--1, .card-stack__title-line--2 {
    width: 5rem; height: 0.125rem; transform: translateY(-50%);
}
.card-stack__title-dot--1 { width: 0.5rem; height: 0.5rem; top: -0.5rem; right: -0.5rem; }
.card-stack__title-dot--2 { width: 0.5rem; height: 0.5rem; bottom: -0.5rem; left: -0.5rem; }

.card-stack__corner--tl { top: -0.5rem; left: -0.5rem; width: 1.5rem; height: 1.5rem; }
.card-stack__corner--tr { top: -0.5rem; right: -0.5rem; width: 1.5rem; height: 1.5rem; }
.card-stack__corner--bl { bottom: -0.5rem; left: -0.5rem; width: 1.5rem; height: 1.5rem; }
.card-stack__corner--br { bottom: -0.5rem; right: -0.5rem; width: 1.5rem; height: 1.5rem; }

.card-stack__corner--fade {
    opacity: 0;
    transition: opacity 0.3s ease;
}
.card-stack__item:hover .card-stack__corner--fade {
    opacity: 1;
}

.card-stack__media--hover {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.1);
}
.card-stack__item:hover .card-stack__media--hover {
    transform: scale(1.05);
    box-shadow: 0 1rem 3rem rgba(0,0,0,0.2);
}

.card-stack__decor--glow {
    background: radial-gradient(circle at center, rgba(var(--bs-primary-rgb), 0.2), transparent);
    opacity: 0;
    transition: opacity 0.5s ease;
}
.card-stack__item:hover .card-stack__decor--glow {
    opacity: 1;
}

.card-stack__img--zoom {
    transition: transform 0.5s ease;
}
.card-stack__item:hover .card-stack__img--zoom {
    transform: scale(1.1);
}

.card-stack__overlay--fade {
    opacity: 0;
    transition: opacity 0.3s ease;
}
.card-stack__item:hover .card-stack__overlay--fade {
    opacity: 1;
}

.card-stack__overlay--dark {
    opacity: 0;
    transition: opacity 0.3s ease;
}
.card-stack__item:hover .card-stack__overlay--dark {
    opacity: 1;
}

.card-stack__inner-corner--tl, .card-stack__inner-corner--br {
    width: 4rem; height: 4rem;
}

.card-stack__badge--shadow {
    transition: box-shadow 0.3s ease;
    box-shadow: 0 0.25rem 0.5rem rgba(0,0,0,0.1);
}
.card-stack__item:hover .card-stack__badge--shadow {
    box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.15);
}

.card-stack__accent-corner--tr { right: 0; width: 2rem; height: 2rem; opacity: 0; transition: opacity 0.3s ease; }
.card-stack__accent-corner--bl { left: 0; width: 2rem; height: 2rem; opacity: 0; transition: opacity 0.3s ease; }
.card-stack__item:hover .card-stack__accent-corner--tr,
.card-stack__item:hover .card-stack__accent-corner--bl {
    opacity: 1;
}

.card-stack__panel--slide {
    transform: translateY(100%);
    transition: transform 0.3s ease;
}
.card-stack__item:hover .card-stack__panel--slide {
    transform: translateY(0);
}

/* quote v16 — grid bookshelf (quote-grid-shelf__* — isolated from quote v12 quote-shelf__*) */

.quote-grid-shelf__art--mesh {
    background-image:
        radial-gradient(circle at 20% 30%, currentColor 0, transparent 42%),
        radial-gradient(circle at 78% 18%, currentColor 0, transparent 38%),
        radial-gradient(circle at 62% 82%, currentColor 0, transparent 45%),
        radial-gradient(circle at 12% 72%, currentColor 0, transparent 36%);
    opacity: 0.18;
}

.quote-grid-shelf__art--hatch {
    background-image: repeating-linear-gradient(
        -38deg,
        transparent,
        transparent 6px,
        currentColor 6px,
        currentColor 7px
    );
    opacity: 0.12;
    mix-blend-mode: overlay;
}

.quote-grid-shelf__art--grain {
    background-image:
        repeating-conic-gradient(from 0deg at 50% 50%, currentColor 0deg 2deg, transparent 2deg 7deg),
        repeating-linear-gradient(90deg, transparent 0 3px, currentColor 3px 4px);
    opacity: 0.08;
}

.quote-grid-shelf__ripple-pool {
    width: 28rem;
    height: 28rem;
    left: var(--ripple-x, 50%);
    top: var(--ripple-y, 50%);
    transform: translate(-50%, -50%) scale(0.35);
    opacity: 0;
    transition: transform 450ms ease, opacity 600ms ease;
    will-change: transform, opacity;
}

.quote-grid-shelf__ripple-pool.is-pulsing {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
    .quote-grid-shelf__ripple-pool {
        display: none;
    }
}

.quote-grid-shelf__bracket {
    width: 0.5rem;
}

.quote-grid-shelf__bracket--left {
    left: 1rem;
}

.quote-grid-shelf__bracket--right {
    right: 1rem;
}

.quote-grid-shelf__scroll {
    max-height: 36rem;
    scroll-behavior: smooth;
    scrollbar-width: thin;
}

.quote-grid-shelf__parent-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: repeat(4, minmax(8.25rem, auto));
    gap: 1rem;
}

@media (min-width: 768px) {
    .quote-grid-shelf__parent-grid {
        gap: 1.5rem;
    }
}

.quote-grid-shelf__child-grid {
    display: grid;
    grid-row: span 1;
    min-height: 100%;
    grid-template-rows: subgrid;
}

@supports not (grid-template-rows: subgrid) {
    .quote-grid-shelf__child-grid {
        grid-template-rows: auto 1fr auto;
        height: 100%;
    }
}

.quote-grid-shelf__ledge:nth-child(1) {
    top: 25%;
}

.quote-grid-shelf__ledge:nth-child(2) {
    top: 50%;
}

.quote-grid-shelf__ledge:nth-child(3) {
    top: 75%;
}

.quote-grid-shelf__ledge {
    height: 0.25rem;
}

.quote-grid-shelf__book--linocut {
    clip-path: polygon(
        0% 1.5%, 3% 0%, 8% 1%, 15% 0%, 24% 1.2%, 35% 0%, 48% 0.8%, 62% 0%, 75% 1%, 88% 0%, 96% 1.5%, 100% 0.5%,
        100% 98%, 97% 100%, 90% 98.5%, 80% 100%, 68% 98%, 55% 100%, 42% 98.5%, 28% 100%, 14% 98%, 5% 100%, 0% 97%
    );
}

.quote-grid-shelf__opening {
    font-variant: common-ligatures;
    letter-spacing: -0.04em;
}

.quote-grid-shelf__reveal {
    opacity: 0;
    transform: translateY(1.25rem);
    transition: opacity 550ms ease, transform 550ms ease;
    transition-delay: calc(var(--shelf-stagger, 0) * 90ms);
}

.quote-grid-shelf__reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .quote-grid-shelf__reveal {
        opacity: 1;
        transform: none;
        transition: none;
        transition-delay: 0ms;
    }
}
/* hover + focus affordances (layout/outline via theme token) */
@media (hover: hover) {
    .quote-grid-shelf-root [role="listitem"]:hover,
    .quote-grid-shelf-root article:hover,
    .quote-grid-shelf-root [class*="quote-grid-shelf__card"]:hover,
    .quote-grid-shelf-root .quote-grid-shelf__book:hover,
    .quote-grid-shelf-root .quote-grid-shelf__step:hover,
    .quote-grid-shelf-root .quote-grid-shelf__index-card:hover,
    .quote-grid-shelf-root .quote-grid-shelf__pill:hover,
    .quote-grid-shelf-root .quote-grid-shelf__item:hover {
        transform: translateY(-0.125rem);
    }
}

.quote-grid-shelf-root [role="listitem"],
.quote-grid-shelf-root article,
.quote-grid-shelf-root [class*="quote-grid-shelf__card"],
.quote-grid-shelf-root .quote-grid-shelf__book,
.quote-grid-shelf-root .quote-grid-shelf__step,
.quote-grid-shelf-root .quote-grid-shelf__index-card,
.quote-grid-shelf-root .quote-grid-shelf__pill {
    transition: transform 200ms ease;
}

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

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