/* 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; }
}

.content-trio-showcase__image {
    display: block;
    width: 100%;
    height: 10rem;
    object-fit: cover;
}

.content-trio-showcase__image--tall {
    height: 14rem;
}

.content-trio-showcase__image--short {
    height: 8rem;
}

.content-trio-showcase__card-lift {
    transition: transform 180ms ease;
}

.content-trio-showcase__card-lift:hover {
    transform: translateY(-0.25rem);
}

.content-trio-showcase__float {
    animation: content-trio-showcase-float 7s ease-in-out infinite;
}

.content-trio-showcase__rail {
    width: 100%;
    height: 0.25rem;
}

.content-trio-showcase__thumb {
    width: 7rem;
    height: 5rem;
}

.content-trio-showcase__badge {
    width: 2.5rem;
    height: 2.5rem;
}

@media (min-width: 768px) {
    .content-trio-showcase__rail {
        width: 0.25rem;
        height: auto;
    }
}

@keyframes content-trio-showcase-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(0.5rem); }
}

.content-trio-showcase__dot {
    width: 0.5rem;
    height: 0.5rem;
}

.content-trio-showcase__float {
    width: 6rem;
    height: 6rem;
}

@media (min-width: 768px) {
    .content-trio-showcase__offset {
        margin-top: 2.5rem;
    }
}

.tips-interactive__badge {
    z-index: 20;
}

.tips-interactive__inner {
    z-index: 10;
}

.tips-interactive__panel {
    z-index: 50;
}

.tips-interactive__thumb {
    width: 4rem;
    height: 4rem;
}

.tips-interactive__thumb--sm {
    width: 3rem;
    height: 3rem;
}

.tips-interactive__panel--collapsed {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-1rem);
}

.tips-interactive__panel--open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

/* glossary gazette — multi-column flow (not CSS grid), brick avoid breaks, footnote icon */
.glossary-gazette__columns {
    column-count: 1;
    column-gap: 1.25rem;
}

@media (min-width: 768px) {
    .glossary-gazette__columns {
        column-count: 2;
        column-gap: 1.5rem;
    }
}

@media (min-width: 1200px) {
    .glossary-gazette__columns {
        column-count: 3;
    }
}

.glossary-gazette__brick {
    break-inside: avoid;
    margin-bottom: 1rem;
}

.glossary-gazette__note-ico {
    width: 3.25rem;
    height: 3.25rem;
}

.glossary-gazette__note-icon {
    font-size: 1.25rem;
    line-height: 1;
}

.alternating-zigzag__media {
  height: 16rem;
}

.alternating-zigzag__bar {
  width: 2rem;
  height: 2px;
}

.alternating-zigzag__img {
    object-fit: cover;
}
.alternating-zigzag__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.inbox-twin-panes__split {
    max-width: 64rem;
}

.inbox-twin-panes__halo {
    width: 10rem;
    height: 10rem;
}