/* intro v20 — Calvin Klein magazine: shimmer sheen, mist, scale-up reveal, strike-through draw */

.intro-mag__img { object-fit: cover; }
.intro-mag__figure { aspect-ratio: 21 / 9; }

/* Gold-foil sheen → shimmer sweep (gradient colours come from Tailwind, motion from CSS) */
.intro-mag__sheen {
    background-size: 220% 220%;
    animation: intro-mag-shimmer 3s linear infinite;
    opacity: 0.35;
}
@keyframes intro-mag-shimmer {
    0%   { background-position: 0% 0%; }
    100% { background-position: 100% 100%; }
}

/* Smoke / mist wisp */
.intro-mag__mist {
    width: 24rem;
    height: 24rem;
    filter: blur(48px);
    opacity: 0.4;
}

/* LED step badge fixed size (no BS w-N/h-N utility) */
.intro-mag__led {
    width: 4rem;
    height: 4rem;
}

/* Dashed connector line (no BS border-style utility) */
.intro-mag__connector {
    border-style: dashed;
}

/* Scale-up on scroll into view — hidden only once JS arms it (no-JS content stays visible) */
.intro-mag.is-armed .intro-mag__scale {
    opacity: 0;
    transform: scale(0.92);
    transition: opacity 560ms ease, transform 560ms ease;
}
.intro-mag.is-armed .intro-mag__scale.is-in {
    opacity: 1;
    transform: scale(1);
}

/* Strikethrough line draw on hover */
.intro-mag__strike { height: 0.125rem; width: 0; transition: width 300ms ease; }
.intro-mag__st:hover .intro-mag__strike { width: 100%; }

@media (prefers-reduced-motion: reduce) {
    .intro-mag__sheen { animation: none; }
    .intro-mag__scale { opacity: 1; transform: none; }
}

.trio-card-hover {
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.trio-card-icon {
    transition: transform 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}

.trio-card-hover:hover {
    transform: translateY(-0.375rem);
    box-shadow: var(--bs-box-shadow-lg);
    border-color: rgba(var(--bs-primary-rgb), 0.35) !important;
}

.trio-card-hover:hover .trio-card-icon {
    transform: scale(1.06);
    background-color: var(--bs-primary);
    color: var(--bs-white);
}

.feature-card-surface {
    position: relative;
    isolation: isolate;
    background: var(--bs-body-bg);
    border: 1px solid var(--bs-border-color-translucent) !important;
    box-shadow: var(--bs-box-shadow-sm);
    transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.feature-card-surface:hover {
    box-shadow: var(--bs-box-shadow-lg);
    border-color: rgba(var(--bs-primary-rgb), 0.35) !important;
}

/* -- 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);
}
/* whyus v20 — fluid parametric backdrop, glitch/scroll reveals */
/* No colors here: `currentColor` reads the Tailwind text-color class already applied on each node. */

/* Geometry shared by both CSS frameworks (Bootstrap has no utilities for it) */
.whyus-parametric {
    padding-top: 6rem;
    padding-bottom: 6rem;
}

.mxw-4xl {
    max-width: 56rem !important;
}

.whyus-parametric__head {
    margin-bottom: 3rem;
}

.whyus-parametric__title {
    font-size: 1.875rem;
    font-weight: 900;
    letter-spacing: 0.1em;
}

.whyus-parametric__lead {
    font-size: 1rem;
    letter-spacing: 0.025em;
}

.whyus-parametric__layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 3rem;
}

.whyus-parametric__main {
    gap: 3rem;
}

.whyus-parametric__side {
    gap: 1.5rem;
}

.whyus-parametric__panel {
    padding: 1.5rem;
}

.whyus-parametric__badge {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

.whyus-parametric__row-title {
    font-size: 1.5rem;
    letter-spacing: 0.025em;
    transition: letter-spacing 200ms ease;
}

.whyus-parametric__row-title:hover {
    letter-spacing: 0.1em;
}

.whyus-parametric__card-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
}

.whyus-parametric__card {
    padding: 1.25rem;
}

.whyus-parametric__card-title {
    font-size: 1.125rem;
    letter-spacing: 0.025em;
    transition: letter-spacing 200ms ease;
}

.whyus-parametric__card-title:hover {
    letter-spacing: 0.1em;
}

.whyus-parametric__card-desc {
    font-size: 0.875rem;
    letter-spacing: 0.025em;
}

.whyus-parametric__note {
    padding: 1.25rem;
}

.whyus-parametric__note-title {
    letter-spacing: 0.1em;
}

.whyus-parametric__divider {
    --bs-bg-opacity: 0.2;
}

/* ── Left-half backdrop: fluid swooping edge instead of a straight 50% cut ── */
.whyus-parametric__bg-half {
    width: 100%;
    overflow: hidden;
    clip-path: polygon(0 0, 92% 0, 100% 18%, 94% 40%, 100% 62%, 90% 100%, 0 100%);
}

/* ── Mesh-gradient blobs — radial gradient from currentColor, slow organic drift ── */
.whyus-parametric__blob {
    background-image: radial-gradient(circle at 50% 50%, currentColor 0%, transparent 70%);
    filter: blur(40px);
    will-change: transform;
}

.whyus-parametric__blob--a {
    top: -4rem;
    inset-inline-start: -6rem;
    width: 18rem;
    height: 18rem;
    opacity: 0.3;
    animation: whyus-parametric-drift-a 22s ease-in-out infinite;
}

.whyus-parametric__blob--b {
    bottom: 0;
    inset-inline-start: 25%;
    width: 16rem;
    height: 16rem;
    opacity: 0.2;
    animation: whyus-parametric-drift-b 28s ease-in-out infinite;
}

.whyus-parametric__blob--c {
    top: 33.333333%;
    inset-inline-start: 33.333333%;
    width: 14rem;
    height: 14rem;
    opacity: 0.25;
    animation: whyus-parametric-drift-c 34s ease-in-out infinite;
}

@keyframes whyus-parametric-drift-a {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(2rem, 3rem) scale(1.08); }
}

@keyframes whyus-parametric-drift-b {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-3rem, -2rem) scale(0.95); }
}

@keyframes whyus-parametric-drift-c {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(1.5rem, -2.5rem) scale(1.05); }
}

@media (prefers-reduced-motion: reduce) {
    .whyus-parametric__blob--a,
    .whyus-parametric__blob--b,
    .whyus-parametric__blob--c {
        animation: none;
    }
}

/* ── Film-perforation edge strip ── */
.whyus-parametric__perf-strip {
    width: 0.5rem;
    background-image: repeating-linear-gradient(to bottom, currentColor 0, currentColor 6px, transparent 6px, transparent 18px);
}

/* ── Row / card containers ── */
.whyus-parametric__row {
    position: relative;
}

.whyus-parametric__card {
    transition: transform 200ms ease;
}

.whyus-parametric__card:hover {
    transform: translateY(-0.25rem);
}

.whyus-parametric__note {
    transition: transform 200ms ease;
}

.whyus-parametric__note:hover {
    transform: translateX(0.25rem);
}

/* ── Skewed swoop divider between rows (Zaha-Hadid-style dynamic line) ── */
.whyus-parametric__divider {
    display: block;
    height: 0.375rem;
    margin-top: 2.5rem;
    clip-path: polygon(0 40%, 20% 60%, 40% 20%, 60% 70%, 80% 30%, 100% 55%, 100% 100%, 0 100%);
}

.whyus-parametric__divider--lg {
    height: 0.5rem;
    margin-top: 3rem;
}

/* ── Appearance animation: glitch flicker on load, then settle ── */
.whyus-parametric__glitch {
    animation: whyus-parametric-glitch 900ms steps(2, end) 1 both;
}

@keyframes whyus-parametric-glitch {
    0% { opacity: 0; transform: translate(0, 0); }
    10% { opacity: 1; transform: translate(-6px, 2px); }
    20% { opacity: 0.2; transform: translate(4px, -3px); }
    30% { opacity: 1; transform: translate(-3px, 0); }
    45% { opacity: 0.4; transform: translate(3px, 2px); }
    60% { opacity: 1; transform: translate(0, -2px); }
    80% { opacity: 0.8; transform: translate(-1px, 1px); }
    100% { opacity: 1; transform: translate(0, 0); }
}

@media (prefers-reduced-motion: reduce) {
    .whyus-parametric__glitch {
        animation: none;
    }
}

/* ── Scroll-driven reveal for the micro-ring rows ──
   Static, fully visible fallback for browsers without scroll-timeline support. */
.whyus-parametric__row--micro {
    opacity: 1;
    transform: none;
}

@supports (animation-timeline: view()) {
    .whyus-parametric__row--micro {
        opacity: 0;
        animation: whyus-parametric-reveal linear both;
        animation-timeline: view();
        /* entry-based range: cover-N% never completes for bottom-of-section cards */
        animation-range: entry 0% entry 100%;
    }
}

@keyframes whyus-parametric-reveal {
    from { opacity: 0; transform: translateY(2rem); }
    to { opacity: 1; transform: translateY(0); }
}

@media (min-width: 768px) {
    .whyus-parametric {
        padding-top: 8rem;
        padding-bottom: 8rem;
    }

    .whyus-parametric__bg-half {
        width: 50%;
    }

    .whyus-parametric__perf-strip {
        width: 0.75rem;
    }

    .whyus-parametric__head {
        margin-bottom: 4rem;
    }

    .whyus-parametric__title {
        font-size: 3rem;
    }

    .whyus-parametric__lead {
        font-size: 1.125rem;
    }

    .whyus-parametric__main {
        gap: 4rem;
    }

    .whyus-parametric__panel {
        padding: 2rem;
    }

    .whyus-parametric__row-title {
        font-size: 1.875rem;
    }

    .whyus-parametric__card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 2rem;
    }

    .whyus-parametric__card,
    .whyus-parametric__note {
        padding: 1.5rem;
    }

    .whyus-parametric__card-title {
        font-size: 1.25rem;
    }

    .whyus-parametric__card-desc {
        font-size: 1rem;
    }
}

@media (min-width: 1024px) {
    .whyus-parametric {
        padding-top: 10rem;
        padding-bottom: 10rem;
    }

    .whyus-parametric__layout {
        grid-template-columns: repeat(12, minmax(0, 1fr));
        gap: 4rem;
    }

    .whyus-parametric__main {
        grid-column: span 8 / span 8;
    }

    .whyus-parametric__side {
        grid-column: span 4 / span 4;
    }
}

.focus-orb {
    top: 0;
    right: 0;
    width: 18rem;
    height: 18rem;
    filter: blur(3rem);
}

.focus-timeline {
    position: relative;
}

.focus-timeline__rail {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 1.5rem;
    width: 2px;
    pointer-events: none;
    --focus-tl-mid: var(--bs-primary, #60a5fa);
    background: linear-gradient(
        to bottom,
        color-mix(in srgb, var(--focus-tl-mid) 80%, transparent),
        color-mix(in srgb, var(--focus-tl-mid) 35%, transparent),
        transparent
    );
}

.dark .focus-timeline__rail {
    --focus-tl-mid: var(--bs-primary, #3b82f6);
}

@media (min-width: 768px) {
    .focus-timeline__rail {
        left: 50%;
        transform: translateX(-50%);
    }
}

.focus-timeline-dot {
    position: absolute;
    top: 1.25rem;
    left: 1.5rem;
    z-index: 2;
    transform: translateX(-50%);
}

@media (min-width: 768px) {
    .focus-timeline-dot {
        left: 50%;
        transform: translateX(-50%);
    }

    /* Відступ карток від центральної лінії (TW + BS) */
    .focus-timeline__item--left .focus-card-hover {
        margin-inline-start: clamp(1.25rem, 4vw, 2.75rem);
    }

    .focus-timeline__item--right .focus-card-hover {
        margin-inline-end: clamp(1.25rem, 4vw, 2.75rem);
    }
}

.focus-card-hover {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.focus-card-hover:hover {
    transform: translateY(-0.125rem);
    box-shadow: var(--bs-box-shadow);
}

.focus-icon-hover {
    transition: transform 0.2s ease;
}

.focus-card-hover:hover .focus-icon-hover {
    transform: scale(1.05);
}

.focus-title-hover {
    transition: color 0.2s ease;
}

.focus-card-hover:hover .focus-title-hover {
    color: var(--bs-primary, #2563eb);
}