/* 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; }
}

/* About v10 — tab visibility and active state (no palette in CSS) */

.guide-sq-8  { width: 2rem;   height: 2rem;   flex-shrink: 0; }
.guide-sq-12 { width: 3rem;   height: 3rem;   flex-shrink: 0; }
.guide-sq-16 { width: 4rem;   height: 4rem;   flex-shrink: 0; }
.guide-sq-20 { width: 5rem;   height: 5rem;   flex-shrink: 0; }

.guide-ab10-tab-panel.guide-ab10-tab-panel-hidden {
    display: none;
}

.guide-ab10-tab-btn.guide-ab10-tab-active {
    font-weight: 700;
    transform: translateY(-1px);
}

.guide-ab10-tab-btn.guide-ab10-tab-inactive {
    font-weight: 500;
    opacity: 0.9;
}

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

.document-folio__photo--shift:hover { transform: scale(1.05); transition: transform .2s ease; }

.document-folio__appeal--shift:hover { transform: scale(1.05); transition: transform .2s ease; }

.content-heading-gap {
    margin-bottom: 2rem;
}


.narrative-chapter__title-trail { margin-bottom: 2rem; }

.narrative-chapter__shell-section-pad {
    padding-top: 6rem;
    padding-bottom: 6rem;
}

.content-heading-gap {
    margin-bottom: 2rem;
}

.headline-icon-stack__icon-wrap {
    width: 3rem;
    height: 3rem;
}

.perks-media-bullets__thumb {
    width: 3.5rem;
    height: 3.5rem;
}

.perks-media-bullets__card {
    transition: transform 0.2s ease;
}

@media (min-width: 640px) {
    .perks-media-bullets__card:hover {
        transform: scale(1.05);
    }
}

.letter-single-slab__card {
    max-width: 48rem;
}

.google-map-with-top-ribbon-and-three-column-info-footer__iframe { width: 100%; min-height: 400px; }
@media (min-width: 768px) { .google-map-with-top-ribbon-and-three-column-info-footer__iframe { min-height: 600px; } }

/* iframe-normalized */
.google-map-with-top-ribbon-and-three-column-info-footer__iframe {
    width: 100%;
    max-width: 100%;
    height: 400px;
    min-height: 400px;
    display: block;
    border: 0;
    box-sizing: border-box;
    vertical-align: bottom;
}

@media (min-width: 768px) {
    .google-map-with-top-ribbon-and-three-column-info-footer__iframe {
        height: 600px;
        min-height: 600px;
    }
}