/* intro v28 — Arc diagonal-split: clip split, floating rings, ransom-note words, grayscale hover, click burst */

/* Diagonal split zone */
.intro-arc2__split {
    clip-path: polygon(0 0, 100% 0, 100% 62%, 0 100%);
    opacity: 0.6;
}

/* Floating rings / donuts (fixed size — no BS w-N/h-N utility) */
.intro-arc2__ring { width: 10rem; height: 10rem; animation: intro-arc2-float 7s ease-in-out infinite; }
.intro-arc2__ring--2 { width: 6rem; height: 6rem; animation-duration: 9s; animation-delay: 1s; }
@keyframes intro-arc2-float {
    50% { transform: translateY(-1.2rem) rotate(20deg); }
}

/* Serif accent (paired with sans body) */
.intro-arc2__serif { font-family: ui-serif, Georgia, "Times New Roman", serif; }

/* Hero image grayscale → colour reveal on hover */
.intro-arc2__figure { aspect-ratio: 4 / 3; }
.intro-arc2__img {
    object-fit: cover;
    filter: grayscale(1);
    transition: filter 420ms ease;
}
.intro-arc2__figure:hover .intro-arc2__img { filter: grayscale(0); }

/* Ransom-note mixed letters: alternate rotation, weight, family (no colour) */
.intro-arc2__word {
    display: inline-block;
    margin-right: 0.25em;
}
.intro-arc2__word:nth-child(3n+1) { transform: rotate(-4deg); font-weight: 900; }
.intro-arc2__word:nth-child(3n+2) { transform: rotate(3deg);  font-family: ui-serif, Georgia, serif; font-style: italic; }
.intro-arc2__word:nth-child(3n+3) { transform: rotate(-1deg); font-weight: 700; text-transform: uppercase; }

/* Click burst spark (inherits the button's primary colour via currentColor) */
.intro-arc2__react { position: relative; overflow: visible; }
.intro-arc2__spark {
    position: absolute;
    left: 50%;
    top: 50%;
    pointer-events: none;
    animation: intro-arc2-burst 640ms ease-out forwards;
}
@keyframes intro-arc2-burst {
    to { opacity: 0; transform: translate(var(--dx), var(--dy)) scale(0.4) rotate(160deg); }
}

@media (prefers-reduced-motion: reduce) {
    .intro-arc2__ring { animation: none; }
}

/* Features v24 — sidebar nav state */
.features-sidebar-nav__btn {
    transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
    border: none !important;
    outline: none;
    /* Left accent via inset box-shadow — reliable across all BS versions */
    box-shadow: inset 3px 0 0 transparent;
}

.features-sidebar-nav__btn.features-sidebar-nav__btn--active {
    background-color: var(--bs-primary-bg-subtle);
    color: var(--bs-primary) !important;
    box-shadow: inset 3px 0 0 var(--bs-primary);
    font-weight: 700;
}

.features-sidebar-nav__btn.features-sidebar-nav__btn--idle {
    background-color: transparent;
    color: var(--bs-body-color);
    box-shadow: inset 3px 0 0 transparent;
    font-weight: 400;
}

.features-sidebar-nav__btn.features-sidebar-nav__btn--idle:hover {
    background-color: var(--bs-secondary-bg);
    color: var(--bs-emphasis-color);
    box-shadow: inset 3px 0 0 var(--bs-primary-bg-subtle);
}

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

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

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

.features-sidebar-nav__decor--pulse {
    filter: blur(48px);
    animation: features-sidebar-nav-pulse-kf 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.features-sidebar-nav__decor--bounce {
    transform: rotate(45deg);
    animation: features-sidebar-nav-bounce-kf 1s infinite;
}

.features-sidebar-nav__decor--spin {
    animation: features-sidebar-nav-spin-kf 1s linear infinite;
}

.features-sidebar-nav__decor--pulse-rotated {
    transform: rotate(45deg);
    animation: features-sidebar-nav-pulse-kf 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* -- 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);
}

/* -- BS-mode decorative shapes — subtle, non-intrusive -- */
.features-decor__bs-blob {
    background-color: var(--bs-primary-bg-subtle);
    opacity: 0.35;
    filter: blur(48px);
}
.features-decor__bs-shape {
    opacity: 0.15;
}
.features-decor__bs-line {
    border-left: 1px solid var(--bs-primary-border-subtle);
    opacity: 0.18;
}
/* Card hover: scale */
.portfolio-item-hover {
    transition: transform 0.3s ease;
}
.portfolio-item-hover:hover {
    transform: scale(1.05);
}

.steps-tip-cards__col {
    max-width: 20rem;
}

.steps-tip-cards__badge-circle {
    width: 4rem;
    height: 4rem;
}

/* Bootstrap: grid + gap (row gutters often collapse) */
.tips-detailed__bs-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
}

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

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

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

.tips-detailed__cta-thumb {
    width: 2rem;
    height: 2rem;
}

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

.cta-staircase__step-num {
  width: 3rem;
  height: 3rem;
  min-width: 3rem;
  min-height: 3rem;
  flex-shrink: 0;
}

.cta-staircase__stairs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.cta-staircase__step {
  transform: translateX(calc(var(--step, 0) * 20px));
  animation: cta-staircase__fade 600ms ease both;
  animation-delay: calc(var(--step, 0) * 100ms);
}

@keyframes cta-staircase__fade {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(calc(var(--step, 0) * 20px)); }
}

@media (max-width: 768px) {
  .cta-staircase__step {
    transform: translateX(0);
  }
}