/* AETHRA — interaction layer on top of main.css / woocommerce.css. */

:root {
  --gold-grad: linear-gradient(115deg, #7a6440 0%, #b99d66 18%, #f2e3b9 38%, #c8ab70 52%, #8d7448 66%, #d9c08a 82%, #f5e8c4 100%);
  --gold-ink: #dcc796;
  --ease-out: cubic-bezier(.2, .7, .2, 1);
}

/* ---------- 1. Gold buttons ---------- */
/* Solid: metallic gold. */
.btn--solid,
.button--primary,
.woocommerce .button.alt,
.woocommerce .checkout-button,
#place_order,
.woocommerce .button.button--primary {
  position: relative;
  background-image: var(--gold-grad) !important;
  background-color: transparent !important;
  background-size: 220% 100%;
  background-position: 0% 50%;
  color: #15120c !important;
  border-color: transparent !important;
  box-shadow: inset 0 1px 0 rgba(255, 246, 220, .55), inset 0 -1px 0 rgba(80, 62, 30, .55);
  transition: background-position .7s var(--ease-out), box-shadow .3s, filter .2s !important;
}

/* Outline: hairline gold-gradient ring (::before) and a gold fill layer (::after). */
.btn:not(.btn--solid),
.button:not(.button--primary),
.woocommerce a.button:not(.alt):not(.checkout-button):not(.button--primary),
.woocommerce button.button:not(.alt):not(.button--primary) {
  position: relative;
  isolation: isolate;
  border-color: transparent !important;
  background: transparent !important;
  color: var(--gold-ink) !important;
  transition: color .35s !important;
}
.btn:not(.btn--solid)::before,
.button:not(.button--primary)::before,
.woocommerce a.button:not(.alt):not(.checkout-button):not(.button--primary)::before,
.woocommerce button.button:not(.alt):not(.button--primary)::before {
  content: ""; position: absolute; inset: -1px; padding: 1px; z-index: -1; pointer-events: none;
  background: var(--gold-grad); background-size: 220% 100%;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}
.btn:not(.btn--solid)::after,
.button:not(.button--primary)::after,
.woocommerce a.button:not(.alt):not(.checkout-button):not(.button--primary)::after,
.woocommerce button.button:not(.alt):not(.button--primary)::after {
  content: ""; position: absolute; inset: -1px; z-index: -1; pointer-events: none;
  background: var(--gold-grad); background-size: 220% 100%; background-position: 100% 50%;
  clip-path: inset(0 100% 0 0);
  transition: clip-path .5s var(--ease-out);
}
.button:disabled::before, .button[aria-disabled="true"]::before { opacity: .45; }
.button .icon, .btn .icon { stroke: currentColor; }

/* ---------- 4. Text links: gold underline ---------- */
.text-link { position: relative; border-bottom: 0 !important; }
.text-link::before, .text-link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; pointer-events: none;
}
.text-link::before { background: var(--line); }
.text-link::after {
  background: var(--gold-grad);
  transform: scaleX(0); transform-origin: right center;
  transition: transform .55s var(--ease-out);
}

/* ---------- Mouse: effects on hover ---------- */
@media (hover: hover) and (pointer: fine) {
  .btn--solid:hover,
  .button--primary:hover,
  .woocommerce .button.alt:hover,
  .woocommerce .checkout-button:hover,
  #place_order:hover,
  .woocommerce .button.button--primary:hover,
  .btn--solid:focus-visible,
  .button--primary:focus-visible,
  .woocommerce .button.alt:focus-visible,
  .woocommerce .checkout-button:focus-visible,
  #place_order:focus-visible,
  .woocommerce .button.button--primary:focus-visible {
    background-size: 220% 100%;
    background-position: 100% 50%;
    box-shadow: inset 0 1px 0 rgba(255, 246, 220, .7), 0 0 0 1px rgba(201, 180, 138, .25), 0 10px 30px -12px rgba(201, 180, 138, .45);
  }
  .btn:not(.btn--solid):hover:not(:disabled),
  .button:not(.button--primary):hover:not(:disabled),
  .woocommerce a.button:not(.alt):not(.checkout-button):not(.button--primary):hover:not(:disabled),
  .woocommerce button.button:not(.alt):not(.button--primary):hover:not(:disabled),
  .btn:not(.btn--solid):focus-visible,
  .button:not(.button--primary):focus-visible,
  .woocommerce a.button:not(.alt):not(.checkout-button):not(.button--primary):focus-visible,
  .woocommerce button.button:not(.alt):not(.button--primary):focus-visible { color: #15120c !important; }
  .btn:not(.btn--solid):hover:not(:disabled)::after,
  .button:not(.button--primary):hover:not(:disabled)::after,
  .woocommerce a.button:not(.alt):not(.checkout-button):not(.button--primary):hover:not(:disabled)::after,
  .woocommerce button.button:not(.alt):not(.button--primary):hover:not(:disabled)::after,
  .btn:not(.btn--solid):focus-visible::after,
  .button:not(.button--primary):focus-visible::after,
  .woocommerce a.button:not(.alt):not(.checkout-button):not(.button--primary):focus-visible::after,
  .woocommerce button.button:not(.alt):not(.button--primary):focus-visible::after { clip-path: inset(0 0 0 0); }
  .text-link:hover::after, .text-link:focus-visible::after { transform: scaleX(1); transform-origin: left center; }
  .category:hover .category__line, .category:focus-visible .category__line { width: 100%; }
}

/* ---------- Touch: effects play once when the element scrolls into view; press feedback ---------- */
@keyframes aethra-sheen { from { background-position: 0% 50%; } to { background-position: 100% 50%; } }
@media (hover: none), (pointer: coarse) {
  .btn--solid.is-inview,
  .button--primary.is-inview,
  .woocommerce .button.alt.is-inview,
  .woocommerce .checkout-button.is-inview,
  #place_order.is-inview,
  .woocommerce .button.button--primary.is-inview { animation: aethra-sheen 1.6s var(--ease-out) .15s both; }
  .btn:not(.btn--solid).is-inview::before,
  .button:not(.button--primary).is-inview::before,
  .woocommerce a.button:not(.alt):not(.checkout-button):not(.button--primary).is-inview::before,
  .woocommerce button.button:not(.alt):not(.button--primary).is-inview::before { animation: aethra-sheen 1.6s var(--ease-out) .15s both; }
  .btn--solid:active,
  .button--primary:active,
  .woocommerce .button.alt:active,
  .woocommerce .checkout-button:active,
  #place_order:active,
  .woocommerce .button.button--primary:active { filter: brightness(1.12); }
  .btn:not(.btn--solid):active:not(:disabled),
  .button:not(.button--primary):active:not(:disabled),
  .woocommerce a.button:not(.alt):not(.checkout-button):not(.button--primary):active:not(:disabled),
  .woocommerce button.button:not(.alt):not(.button--primary):active:not(:disabled) { color: #15120c !important; }
  .btn:not(.btn--solid):active:not(:disabled)::after,
  .button:not(.button--primary):active:not(:disabled)::after,
  .woocommerce a.button:not(.alt):not(.checkout-button):not(.button--primary):active:not(:disabled)::after,
  .woocommerce button.button:not(.alt):not(.button--primary):active:not(:disabled)::after { clip-path: inset(0 0 0 0); transition-duration: .15s; }
  .text-link.is-inview::after { transform: scaleX(1); transform-origin: left center; transition: transform 1s var(--ease-out) .2s; }
  .category.is-inview .category__line { width: 100%; transition: width 1.2s var(--ease-out) .25s; }
}

/* ---------- 2. Quality list without numbers ---------- */
.quality-list__item { display: block; }

/* ---------- 7. Accordion: animated open / close ---------- */
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after {
  content: "" !important; width: 12px; height: 12px; top: 50%; margin-top: -6px;
  background:
    linear-gradient(var(--gold), var(--gold)) center / 12px 1px no-repeat,
    linear-gradient(var(--gold), var(--gold)) center / 1px 12px no-repeat;
  transition: transform .45s var(--ease-out);
}
.accordion details[open] summary::after, .accordion details.is-opening summary::after { transform: rotate(135deg); }
.accordion details.is-closing summary::after { transform: rotate(0deg); }
.accordion details { overflow: hidden; }
.accordion details > p { padding: 0 34px 24px 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

/* ---------- 8. Home timeline: four segments fill on scroll ---------- */
.timeline { position: relative; height: 260vh; border-top: 1px solid var(--line); }
.timeline__sticky { position: sticky; top: 0; min-height: 100vh; min-height: 100svh; display: flex; align-items: center; padding: 100px 0 60px; }
.timeline__sticky > .container { flex: 0 0 auto; }
.timeline__track { list-style: none; margin: 56px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.timeline__step { --fill: 0; position: relative; padding-top: 34px; }
.timeline__bar { position: absolute; left: 0; right: 0; top: 4px; height: 1px; background: var(--line); overflow: hidden; }
.timeline__fill { position: absolute; inset: 0; background: var(--gold-grad); transform: scaleX(var(--fill)); transform-origin: left center; }
.timeline__dot {
  position: absolute; left: 0; top: 0; width: 9px; height: 9px; border: 1px solid #6f6a60; background: var(--black);
  transform: rotate(45deg); transition: background .4s, border-color .4s, box-shadow .4s;
}
.timeline__step.is-reached .timeline__dot { background: var(--gold); border-color: var(--gold); box-shadow: 0 0 14px rgba(201, 180, 138, .55); }
.timeline__step h3, .timeline__step p {
  opacity: calc(.28 + var(--fill) * .72);
  transform: translateY(calc((1 - var(--fill)) * 14px));
}
.timeline__step h3 { font-size: 20px; margin-bottom: 12px; color: var(--ink); }
.timeline__step.is-reached h3 { color: var(--gold); }
.timeline__step p { font-size: 14px; line-height: 1.8; color: var(--muted); max-width: 260px; }

/* ---------- 9. About: flip cards on scroll ---------- */
.flip-steps { position: relative; height: 320vh; border-top: 1px solid var(--line); }
.flip-steps__sticky { position: sticky; top: 0; min-height: 100vh; min-height: 100svh; display: flex; align-items: center; padding: 100px 0 60px; }
.flip-steps__sticky > .container { flex: 0 0 auto; }
.flip-steps__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px; }
.flip-card { --flip: 0; perspective: 1400px; min-height: 280px; }
.flip-card__inner {
  position: relative; height: 100%; min-height: inherit; transform-style: preserve-3d;
  transform: rotateY(calc((1 - var(--flip)) * -180deg));
}
.flip-card__face {
  position: absolute; inset: 0; backface-visibility: hidden; -webkit-backface-visibility: hidden;
  border: 1px solid var(--line); padding: 32px 28px; display: flex; flex-direction: column;
}
.flip-card__face--back {
  transform: rotateY(180deg); align-items: center; justify-content: center; gap: 18px;
  background: radial-gradient(120% 90% at 50% 0%, #1a1814 0%, #0e0e0f 70%);
}
.flip-card__face--front { background: linear-gradient(180deg, #151517 0%, #0f0f10 100%); border-color: rgba(201, 180, 138, .35); }
.flip-card__mark { font-size: 13px; letter-spacing: var(--track); color: var(--gold); }
.flip-card__rule { width: 48px; height: 1px; background: var(--gold-grad); }
.flip-card__face--front h3 { font-size: 22px; color: var(--ink); margin: 0 0 18px; }
.flip-card__face--front .flip-card__rule { margin-bottom: 18px; }
.flip-card__face--front p { font-size: 14px; line-height: 1.8; color: var(--muted); margin: 0; }

/* ---------- 3. Category cards: gold line extends on hover ---------- */
.category__line { display: block; width: 36px; height: 1px; margin: 14px 0 12px; background: var(--gold-grad); transition: width .8s var(--ease-out); }

/* ---------- 10. Molecule: atoms near the cursor grow ---------- */
.molecule { overflow: visible; }
.molecule .bond { stroke: var(--gold); stroke-opacity: .42; stroke-width: 1; transition: stroke-opacity .45s, stroke-width .45s; }
.molecule .atom { transform-box: fill-box; transform-origin: center; transition: transform .5s var(--ease-out), filter .5s; }
.molecule .atom--c { fill: var(--black); stroke: var(--gold); stroke-width: 1; }
.molecule .atom--o { fill: var(--mol-o); stroke: none; }
.molecule .atom--n { fill: var(--mol-n); stroke: none; }
.molecule .atom--h { fill: #77736b; stroke: none; }
.molecule.is-active .atom, .molecule.is-active .bond { transition-duration: .18s; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .flip-steps__grid { grid-template-columns: repeat(2, 1fr); }
  .flip-card { min-height: 230px; }
}
@media (max-width: 820px) {
  .timeline { height: 300vh; }
  .timeline__track { grid-template-columns: 1fr; gap: 0; margin-top: 36px; }
  .timeline__step { padding: 0 0 30px 32px; }
  .timeline__step:last-child { padding-bottom: 0; }
  .timeline__bar { top: 14px; bottom: 0; left: 4px; right: auto; width: 1px; height: auto; }
  .timeline__step:last-child .timeline__bar { display: none; }
  .timeline__fill { transform: scaleY(var(--fill)); transform-origin: center top; }
  .timeline__dot { top: 2px; }
  .timeline__step h3 { font-size: 18px; margin-bottom: 6px; }
  .timeline__step p { max-width: none; font-size: 13px; }
}
@media (max-width: 600px) {
  .flip-steps { height: 360vh; }
  .flip-steps__grid { gap: 10px; margin-top: 28px; }
  .flip-card { min-height: 200px; }
  .flip-card__face { padding: 20px 16px; }
  .flip-card__face--front h3 { font-size: 16px; margin-bottom: 12px; }
  .flip-card__face--front .flip-card__rule { margin-bottom: 12px; }
  .flip-card__face--front p { font-size: 12px; line-height: 1.6; }
}

/* Reduced motion: no scroll pinning, everything shown. */
@media (prefers-reduced-motion: reduce) {
  .timeline, .flip-steps { height: auto; }
  .timeline__sticky, .flip-steps__sticky { position: static; min-height: 0; }
  .timeline__step { --fill: 1 !important; }
  .flip-card { --flip: 1 !important; }
  .text-link::after, .btn::after, .button::after { transition: none; }
}