/* intro v16 — Metropolis reel: film-perforation strips, image cover, load stagger, radius morph */

/* Film-perforation edge strips: colour comes from Tailwind bg-* on the element; mask punches holes */
.intro-reel__perf {
    -webkit-mask: radial-gradient(circle at center, transparent 0 0.28rem, black 0.3rem) center / 1.5rem 2.2rem;
    mask: radial-gradient(circle at center, transparent 0 0.28rem, black 0.3rem) center / 1.5rem 2.2rem;
    z-index: 1;
}

/* Background image fills the band, keeps aspect via object-fit (no BS utility) */
.intro-reel__row {
    min-height: 18rem;
    transition: border-radius 320ms ease;
    opacity: 0;
    animation: intro-reel-rise 520ms ease forwards;
}
.intro-reel__img {
    object-fit: cover;
    object-position: center;
}

/* Border-radius morph on hover */
.intro-reel__row:hover {
    border-radius: 2.25rem 0.5rem 2.25rem 0.5rem;
}

/* Stagger children — 80ms delay each on load */
.intro-reel__row:nth-child(1) { animation-delay: 0ms; }
.intro-reel__row:nth-child(2) { animation-delay: 80ms; }
.intro-reel__row:nth-child(3) { animation-delay: 160ms; }
.intro-reel__row:nth-child(4) { animation-delay: 240ms; }
.intro-reel__row:nth-child(5) { animation-delay: 320ms; }
.intro-reel__row:nth-child(6) { animation-delay: 400ms; }

@keyframes intro-reel-rise {
    from { opacity: 0; transform: translateY(1.5rem); }
    to   { opacity: 1; transform: translateY(0); }
}

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

.tips-numbered__card {
    max-width: 24rem;
}

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


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

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

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

.content-img-compact {
    display: block;
    width: 100%;
    height: 12rem;
    min-height: 12rem;
    flex-shrink: 0;
    object-fit: cover;
}
@media (min-width: 768px) {
    .content-img-compact {
        height: 14rem;
        min-height: 14rem;
    }
}


.explain-solver__unit--lift:hover { transform: scale(1.05); transition: transform .2s ease; }

.explain-solver__icon-thumb { width: 3rem; height: 3rem; }


.conversion-boost__section {
    padding-top: 6rem;
    padding-bottom: 6rem;
}

@keyframes conversion-boost-highlight-throb-track {
    0%, 100% { opacity: 1; }
    50%       { opacity: .5; }
}
.conversion-boost__highlight--throb {
    animation: conversion-boost-highlight-throb-track 2s cubic-bezier(.4,0,.6,1) infinite;
}

.conversion-boost__jump--rise:hover { transform: scale(1.05); transition: transform .2s ease; }