/* =============================================================================
 *  COMPONENTS — buttons, cards, and every reusable section piece.
 * ===========================================================================*/

/* ================================ BUTTONS ================================ */
.btn {
  --btn-bg: var(--c-surface-3);
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: .6rem;
  padding: .85rem 1.6rem; border-radius: var(--r-pill);
  font-weight: 700; font-size: var(--fs-sm); letter-spacing: .01em; line-height: 1;
  color: var(--c-text); background: var(--btn-bg);
  border: 1px solid var(--c-line-strong);
  transition: transform var(--t-fast) var(--ease-out), box-shadow var(--t-fast), background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
  overflow: hidden; isolation: isolate; will-change: transform;
}
.btn svg { flex: none; width: 1.15em; height: 1.15em; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  color: var(--c-text-ink); border-color: transparent;
  background: var(--grad-ember); box-shadow: var(--sh-ember);
}
.btn--primary::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0;
  background: linear-gradient(135deg, var(--c-amber), var(--c-ember)); transition: opacity var(--t-fast);
}
.btn--primary:hover { box-shadow: 0 14px 50px rgba(255,110,40,.5); }
.btn--primary:hover::before { opacity: 1; }

.btn--ghost { background: rgba(255,255,255,.03); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.btn--ghost:hover { border-color: var(--c-ember); color: var(--c-ember); background: rgba(255,138,61,.08); }

.btn--lg { padding: 1.05rem 2.1rem; font-size: 1rem; }
.btn--sm { padding: .6rem 1.1rem; font-size: var(--fs-xs); }
.btn--block { display: flex; width: 100%; }
.btn[disabled], .btn.is-disabled { opacity: .5; cursor: not-allowed; pointer-events: none; filter: grayscale(.4); box-shadow: none; }

/* ================================ ABOUT ================================ */
.about__grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.about__media { position: relative; }
.about__frame {
  position: relative; border-radius: var(--r-lg); overflow: hidden;
  border: 1px solid var(--c-line-strong); box-shadow: var(--sh-lg);
  transform-style: preserve-3d; transition: transform var(--t-med) var(--ease-out);
}
.about__frame img { width: 100%; aspect-ratio: 16/11; object-fit: cover; }
.about__frame::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(10,15,12,.5));
  pointer-events: none;
}
.about__badge {
  position: absolute; right: -10px; bottom: -16px; display: flex; align-items: center; gap: .6rem;
  padding: .8rem 1.1rem; border-radius: var(--r-pill);
  background: var(--c-surface-2); border: 1px solid var(--c-line-strong); box-shadow: var(--sh-md);
  font-size: var(--fs-sm); font-weight: 700;
}
.about__badge svg { color: var(--c-ember); }

.about__list { margin-top: 1.6rem; display: grid; gap: .85rem; }
.about__list li { position: relative; padding-left: 1.8rem; color: var(--c-text-soft); font-size: var(--fs-body); }
.about__list li::before {
  content: ""; position: absolute; left: 0; top: .55em; width: 9px; height: 9px;
  background: var(--grad-ember); border-radius: 2px; transform: rotate(45deg);
}
.about__list b { color: var(--c-text); }

/* ================================ FEATURES ================================ */
.features__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.feature-card {
  position: relative; padding: 2rem 1.75rem; border-radius: var(--r-lg);
  background: var(--grad-surface); border: 1px solid var(--c-line);
  transition: transform var(--t-med) var(--ease-out), border-color var(--t-med), box-shadow var(--t-med);
  overflow: hidden; transform-style: preserve-3d;
}
.feature-card::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity var(--t-med);
  background: radial-gradient(420px 220px at var(--mx, 50%) var(--my, 0%), rgba(255,138,61,.14), transparent 70%);
}
.feature-card:hover { border-color: var(--c-line-strong); box-shadow: var(--sh-lg); }
.feature-card:hover::before { opacity: 1; }
.feature-card__icon {
  width: 56px; height: 56px; display: grid; place-items: center; font-size: 1.7rem;
  border-radius: var(--r-md); margin-bottom: 1.2rem;
  background: rgba(255,138,61,.10); border: 1px solid var(--c-line-strong);
}
.feature-card h3 { font-size: var(--fs-h3); margin-bottom: .55rem; color: var(--c-text); }
.feature-card p { font-size: var(--fs-sm); color: var(--c-text-soft); }

/* ================================ SHOWCASE ================================ */
.showcase { overflow: hidden; }
.showcase__bg { position: absolute; inset: -12% 0 0 0; z-index: 0; will-change: transform; }
.showcase__bg img { width: 100%; height: 124%; object-fit: cover; }
.showcase__scrim { position: absolute; inset: 0; background: linear-gradient(90deg, var(--c-bg) 0%, rgba(10,15,12,.72) 45%, rgba(10,15,12,.3) 100%); }
.showcase__inner { position: relative; z-index: 2; max-width: 640px; }
.showcase__stats { display: flex; flex-wrap: wrap; gap: 2.5rem; margin-top: 2.5rem; }
.showcase__stats strong { display: block; font-family: var(--font-display); font-size: 2.6rem; font-weight: 800; color: var(--c-amber); line-height: 1; }
.showcase__stats span { font-size: var(--fs-xs); letter-spacing: .1em; text-transform: uppercase; color: var(--c-text-soft); }

/* ================================ GALLERY ================================ */
.gallery__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; grid-auto-flow: dense; }
.gallery__item {
  position: relative; border-radius: var(--r-md); overflow: hidden; aspect-ratio: 4/3;
  border: 1px solid var(--c-line); cursor: pointer; display: block; width: 100%;
}
.gallery__item--wide { grid-column: span 2; aspect-ratio: 16/9; }
.gallery__item img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--t-slow) var(--ease-out), filter var(--t-med); }
.gallery__item:hover img { transform: scale(1.07); filter: saturate(1.15); }
.gallery__cap {
  position: absolute; left: 1rem; bottom: 1rem; z-index: 2; font-size: var(--fs-sm); font-weight: 700;
  color: #fff; text-shadow: 0 2px 10px rgba(0,0,0,.8); transform: translateY(10px); opacity: 0; transition: all var(--t-med) var(--ease-out);
}
.gallery__item::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,.6)); opacity: 0; transition: opacity var(--t-med); }
.gallery__item:hover .gallery__cap { transform: translateY(0); opacity: 1; }
.gallery__item:hover::after { opacity: 1; }

/* ================================ DOWNLOAD ================================ */
.download__version { display: inline-block; margin-left: .4rem; color: var(--c-ember); font-weight: 700; }

.download__hero {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap;
  padding: 1.6rem 1.9rem; margin-bottom: 1.5rem;
  border-radius: var(--r-lg); border: 1px solid rgba(255,138,61,.4);
  background: linear-gradient(110deg, rgba(255,138,61,.12), var(--c-surface-2));
  box-shadow: var(--sh-md);
}
.download__hero-eyebrow { font-size: var(--fs-xs); letter-spacing: .12em; text-transform: uppercase; color: var(--c-ember); font-weight: 700; }
.download__hero-os { font-family: var(--font-display); font-size: 1.6rem; font-weight: 800; margin-top: .25rem; }
.download__hero-detail { font-size: var(--fs-sm); color: var(--c-text-mute); }
.download__hero-btn { min-width: 200px; }

.download__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.download-card {
  display: flex; flex-direction: column; gap: .9rem; padding: 1.6rem 1.4rem;
  border-radius: var(--r-lg); background: var(--grad-surface); border: 1px solid var(--c-line);
  transition: transform var(--t-med) var(--ease-out), border-color var(--t-med), box-shadow var(--t-med);
}
.download-card.is-recommended { border-color: rgba(255,138,61,.5); box-shadow: var(--sh-ember); }
.download-card:hover { transform: translateY(-5px); border-color: var(--c-line-strong); box-shadow: var(--sh-lg); }
.download-card__top { display: flex; align-items: center; gap: .8rem; }
.download-card__icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: var(--r-md); background: rgba(255,255,255,.05); border: 1px solid var(--c-line); }
.download-card__icon svg { width: 24px; height: 24px; color: var(--c-text); }
.download-card__name { font-weight: 800; font-size: 1.05rem; line-height: 1.15; }
.download-card__detail { font-size: var(--fs-xs); color: var(--c-text-mute); }
.download-card__meta { display: flex; gap: .6rem; align-items: center; font-size: var(--fs-xs); color: var(--c-text-mute); margin-top: auto; }
.download-card__pill { padding: .2rem .55rem; border-radius: var(--r-pill); background: rgba(111,191,63,.14); color: var(--c-forest); font-weight: 700; }
.download-card__btn { margin-top: .4rem; }
.download-card__soon { font-size: var(--fs-xs); color: var(--c-text-mute); text-align: center; padding: .3rem 0; }

.download__note { text-align: center; margin: 2rem auto 0; max-width: 60ch; font-size: var(--fs-sm); color: var(--c-text-mute); }
.download__note a { color: var(--c-ember); font-weight: 600; }
.download__note a:hover { text-decoration: underline; }

/* requirements table */
.reqs { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 2.5rem; }
.reqs__col { padding: 1.6rem 1.8rem; border-radius: var(--r-lg); background: var(--c-surface); border: 1px solid var(--c-line); }
.reqs__col--rec { border-color: rgba(111,191,63,.3); background: linear-gradient(180deg, rgba(111,191,63,.06), var(--c-surface)); }
.reqs__col h4 { font-size: var(--fs-xs); letter-spacing: .14em; text-transform: uppercase; color: var(--c-text); margin-bottom: 1rem; }
.reqs__col--rec h4 { color: var(--c-forest); }
.reqs dl { display: grid; grid-template-columns: auto 1fr; gap: .55rem 1rem; }
.reqs dt { font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: .06em; color: var(--c-text-mute); }
.reqs dd { font-size: var(--fs-sm); color: var(--c-text-soft); text-align: right; }

/* ================================ FAQ ================================ */
.faq__layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(2rem, 6vw, 4.5rem); align-items: start; }
.faq__head { position: sticky; top: calc(var(--nav-h) + 2rem); }
.faq__head .section__title { text-align: left; }
.faq__list { display: grid; gap: .75rem; }
.faq__item { border: 1px solid var(--c-line); border-radius: var(--r-md); background: var(--c-surface); overflow: hidden; transition: border-color var(--t-fast); }
.faq__item[open] { border-color: var(--c-line-strong); }
.faq__item summary {
  list-style: none; cursor: pointer; padding: 1.15rem 1.4rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  font-weight: 700; font-size: 1.02rem; color: var(--c-text);
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+"; flex: none; width: 26px; height: 26px; display: grid; place-items: center; font-size: 1.3rem; font-weight: 400;
  color: var(--c-ember); border: 1px solid var(--c-line-strong); border-radius: 50%; transition: transform var(--t-fast);
}
.faq__item[open] summary::after { content: "−"; transform: rotate(180deg); }
.faq__body { padding: 0 1.4rem 1.25rem; }
.faq__body p { font-size: var(--fs-sm); color: var(--c-text-soft); }

/* ================================ CTA ================================ */
.cta { overflow: hidden; text-align: center; }
.cta__bg { position: absolute; inset: -12% 0 0 0; z-index: 0; }
.cta__bg img { width: 100%; height: 124%; object-fit: cover; }
.cta__scrim { position: absolute; inset: 0; background: linear-gradient(180deg, var(--c-bg) 0%, rgba(10,15,12,.7) 50%, var(--c-bg) 100%); }
.cta__inner { position: relative; z-index: 2; max-width: 640px; margin-inline: auto; }
.cta__title { font-family: var(--font-display); font-size: var(--fs-h1); font-weight: 900; color: var(--c-text); }
.cta__lead { font-size: var(--fs-lead); color: var(--c-text-soft); margin-top: 1rem; }
.cta__actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-top: 2.4rem; }

/* ================================ LIGHTBOX ================================ */
.lightbox {
  position: fixed; inset: 0; z-index: var(--z-overlay); display: flex; align-items: center; justify-content: center;
  background: rgba(5,8,6,.92); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  opacity: 0; visibility: hidden; transition: opacity var(--t-med), visibility var(--t-med);
}
.lightbox.is-open { opacity: 1; visibility: visible; }
.lightbox__figure { max-width: min(1100px, 92vw); max-height: 86vh; margin: 0; transform: scale(.96); transition: transform var(--t-med) var(--ease-out); }
.lightbox.is-open .lightbox__figure { transform: scale(1); }
.lightbox__figure img { width: 100%; max-height: 80vh; object-fit: contain; border-radius: var(--r-md); box-shadow: var(--sh-lg); }
.lightbox__figure figcaption { text-align: center; margin-top: 1rem; color: var(--c-text-soft); font-size: var(--fs-sm); font-weight: 600; }
.lightbox__close { position: absolute; top: 1.3rem; right: 1.6rem; font-size: 2.4rem; line-height: 1; color: var(--c-text-soft); transition: color var(--t-fast), transform var(--t-fast); }
.lightbox__close:hover { color: var(--c-ember); transform: rotate(90deg); }
.lightbox__nav { position: absolute; top: 50%; transform: translateY(-50%); width: 56px; height: 56px; border-radius: 50%; font-size: 1.5rem; color: var(--c-text); background: rgba(255,255,255,.06); border: 1px solid var(--c-line-strong); transition: background var(--t-fast), color var(--t-fast); }
.lightbox__nav:hover { background: var(--c-ember); color: var(--c-text-ink); }
.lightbox__nav--prev { left: 1.2rem; } .lightbox__nav--next { right: 1.2rem; }

/* ================================ TO-TOP ================================ */
.to-top {
  position: fixed; right: 1.5rem; bottom: 1.5rem; z-index: var(--z-nav);
  width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center;
  color: var(--c-text-ink); background: var(--grad-ember); box-shadow: var(--sh-ember);
  opacity: 0; transform: translateY(20px) scale(.8); pointer-events: none; transition: all var(--t-med) var(--ease-out);
}
.to-top.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { transform: translateY(-3px); }

/* ================================ PRELOADER ================================ */
.preloader {
  position: fixed; inset: 0; z-index: var(--z-preloader); display: grid; place-items: center;
  background: var(--c-bg); transition: opacity var(--t-slow) var(--ease-out), visibility var(--t-slow);
}
.preloader.is-done { opacity: 0; visibility: hidden; }
.preloader__core { display: flex; flex-direction: column; align-items: center; gap: 1.4rem; }
.preloader__mark { color: var(--c-ember); animation: pulse-glow 1.8s var(--ease-in-out) infinite; }
.preloader__bar { width: 200px; height: 4px; border-radius: 999px; background: var(--c-surface-3); overflow: hidden; }
.preloader__fill { display: block; height: 100%; width: 0%; background: var(--grad-ember); transition: width .2s linear; }
.preloader__label { font-size: var(--fs-xs); letter-spacing: .2em; text-transform: uppercase; color: var(--c-text-mute); }