/* 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; }
}

.features-hud-panel__decor--pulse {
    top: -5rem;
    left: 33.333333%;
    animation: features-hud-panel-pulse-kf 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.features-hud-panel__decor--spin {
    bottom: -6rem;
    right: 25%;
    animation: features-hud-panel-spin-kf 1s linear infinite;
}

.features-hud-panel__decor--bounce {
    top: 50%;
    right: 33.333333%;
    transform: rotate(45deg);
    animation: features-hud-panel-bounce-kf 1s infinite;
}

.features-hud-panel__decor--line {
    top: 33.333333%;
    right: 25%;
    transform: rotate(-12deg);
}

.features-hud-panel__grid-overlay {
    background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 36px 36px;
}

/* ── BS-mode: panel shell (colors live in template bg-dark) ── */
.features-hud-panel__bs-panel {
    min-width: 0;
}

.features-hud-panel__bs-accent-top {
    height: 2px;
    background: linear-gradient(to right, transparent, var(--bs-primary), transparent);
}

.features-hud-panel__bs-accent-bottom {
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(var(--bs-primary-rgb), 0.4), transparent);
}

.features-hud-panel__bs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
}

.features-hud-panel__bs-grid > figure {
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.features-hud-panel__bs-grid > figure:nth-child(2n) {
    border-right: none;
}

.features-hud-panel__bs-grid > figure:nth-last-child(-n+2):nth-child(2n+1),
.features-hud-panel__bs-grid > figure:nth-last-child(-n+2):nth-child(2n+1) ~ figure {
    border-bottom: none;
}

@media (max-width: 575.98px) {
    .features-hud-panel__bs-grid {
        grid-template-columns: 1fr;
    }
    .features-hud-panel__bs-grid > figure {
        border-right: none;
    }
    .features-hud-panel__bs-grid > figure:last-child {
        border-bottom: none;
    }
}

/* ── BS-mode decorative shapes ── */
.features-hud-panel__decor--bs-blob {
    background-color: var(--bs-primary-bg-subtle);
    opacity: 0.3;
    filter: blur(48px);
}

.features-hud-panel__decor--bs-shape {
    opacity: 0.12;
}

.features-hud-panel__decor--bs-line {
    border-left: 1px solid var(--bs-primary-border-subtle);
    opacity: 0.18;
}

.features-hud-panel__item {
    min-width: 0;
}

.features-hud-panel__dot--pulse {
    animation: features-hud-panel-pulse-kf 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes features-hud-panel-pulse-kf {
    0%, 100% { opacity: 1; }
    50% { opacity: .5; }
}

@keyframes features-hud-panel-spin-kf {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes features-hud-panel-bounce-kf {
    0%, 100% { transform: translateY(-25%) rotate(45deg); animation-timing-function: cubic-bezier(0.8,0,1,1); }
    50% { transform: none; animation-timing-function: cubic-bezier(0,0,0.2,1); }
}

/* -- 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);
}
.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;
    }
}

/* advantages collage — CSS multi-column masonry (no BS analog); cards must not split across columns */

/* decor sizes/positions live here so they render in Bootstrap too (BS has no w-N/h-N/inset utilities) */
.advantages-collage__orb {
    width: 20rem;
    height: 20rem;
    top: -6rem;
    left: -4rem;
}

.advantages-collage__ring {
    width: 16rem;
    height: 16rem;
    bottom: -4rem;
    right: -4rem;
}

.advantages-collage {
    column-count: 1;
    column-gap: 1.5rem;
}

.advantages-collage__cell {
    break-inside: avoid;
}

@media (min-width: 640px) {
    .advantages-collage {
        column-count: 2;
    }
}

@media (min-width: 1024px) {
    .advantages-collage {
        column-count: 3;
    }
}

/* Bootstrap: explicit grid + gap (row gutters often collapse) */
.tips-grid__bs-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
}

.tips-grid__min-shrink {
    min-width: 0;
}

@media (min-width: 768px) {
    .tips-grid__bs-row {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.tips-grid__subtitle {
    max-width: 42rem;
}

.tips-grid__thumb {
    width: 3rem;
    height: 3rem;
}


.beacon-signal__section {
    padding-top: 6rem;
    padding-bottom: 6rem;
}

.beacon-signal__inner {
    max-width: 64rem;
    width: 100%;
    box-sizing: border-box;
    padding-bottom: 1.5rem;
}

@keyframes beacon-signal-pin-blink-seq {
    0%, 100% { opacity: 1; }
    50%       { opacity: .5; }
}
.beacon-signal__pin--blink {
    animation: beacon-signal-pin-blink-seq 2s cubic-bezier(.4,0,.6,1) infinite;
}

.beacon-signal__slab--glow:hover { transform: scale(1.05); transition: transform .2s ease; }

.beacon-signal__record--glow:hover { transform: scale(1.05); transition: transform .2s ease; }

.beacon-signal__prompt--glow:hover { transform: scale(1.05); transition: transform .2s ease; }

.beacon-signal__action--glow:hover { transform: scale(1.05); transition: transform .2s ease; }

/* Equal columns + row/column gap (flex-wrap + content width caused uneven cards) */
.beacon-signal__surround-row-bs {
    display: grid;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 1rem;
    row-gap: 1.5rem;
}

@media (min-width: 768px) {
    .beacon-signal__surround-row-bs {
        column-gap: 1.25rem;
        row-gap: 1.75rem;
    }
}

@media (min-width: 992px) {
    .beacon-signal__surround-row-bs {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        column-gap: 1.5rem;
        row-gap: 1.75rem;
    }
}

.beacon-signal__surround-row-bs > .beacon-signal__record--glow {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0.5rem;
    min-width: 0;
    width: 100%;
    max-width: none;
    box-sizing: border-box;
}