/* Digital Wave — premium motion buttons
   Inspired by the supplied flow/orbit/compact button references. */

.premium-button {
  --pb-height: 54px;
  --pb-icon-size: 42px;
  --pb-inset: 5px;
  --pb-travel: 0px;
  --pb-pointer-x: 50%;
  --pb-pointer-y: 50%;
  position: relative;
  isolation: isolate;
  display: inline-flex;
  min-width: 188px;
  min-height: var(--pb-height);
  padding: 0 calc(var(--pb-icon-size) + var(--pb-inset) + 17px) 0 22px;
  overflow: hidden;
  align-items: center;
  justify-content: flex-start;
  gap: 0;
  border: 1px solid rgba(255,255,255,.46);
  border-radius: 999px;
  outline: none;
  cursor: pointer;
  font-family: "Helvetica Neue", Inter, Arial, sans-serif;
  font-size: 12px;
  font-weight: 680;
  letter-spacing: .015em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transform: translateZ(0);
  transition:
    color .55s cubic-bezier(.16,1,.3,1),
    background .55s cubic-bezier(.16,1,.3,1),
    border-color .4s ease,
    box-shadow .55s cubic-bezier(.16,1,.3,1),
    transform .35s cubic-bezier(.16,1,.3,1);
  -webkit-tap-highlight-color: transparent;
}

.premium-button::before {
  content: "";
  position: absolute;
  z-index: 0;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle 90px at var(--pb-pointer-x) var(--pb-pointer-y), rgba(255,255,255,.23), transparent 72%);
  opacity: 0;
  transition: opacity .35s ease;
  pointer-events: none;
}

.premium-button::after {
  content: "";
  position: absolute;
  z-index: 0;
  top: -70%;
  left: -28%;
  width: 24%;
  height: 240%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.28), transparent);
  filter: blur(5px);
  opacity: 0;
  transform: translateX(-240%) rotate(18deg);
  transition: transform .9s cubic-bezier(.16,1,.3,1), opacity .3s ease;
  pointer-events: none;
}

.premium-button__label {
  position: relative;
  z-index: 2;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  transition:
    color .45s ease,
    opacity .35s ease,
    transform .72s cubic-bezier(.16,1,.3,1),
    filter .45s ease;
  will-change: transform;
}

.premium-button__orbit {
  position: absolute;
  z-index: 3;
  top: 50%;
  right: var(--pb-inset);
  display: grid;
  width: var(--pb-icon-size);
  height: var(--pb-icon-size);
  place-items: center;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 50%;
  box-shadow: 0 7px 18px rgba(0,0,0,.2), inset 0 1px 0 rgba(255,255,255,.13);
  transform: translate3d(0,-50%,0);
  transform-origin: center;
  transition:
    color .45s ease,
    background .45s ease,
    border-color .45s ease,
    box-shadow .55s ease,
    transform .78s cubic-bezier(.16,1,.3,1);
  will-change: transform;
}

.premium-button__orbit::before {
  content: "";
  position: absolute;
  inset: 1px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: inherit;
  opacity: .8;
}

.premium-button__orbit svg {
  position: relative;
  z-index: 1;
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.55;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform .55s cubic-bezier(.16,1,.3,1);
}

.premium-button--light {
  border-color: rgba(255,255,255,.9);
  background: linear-gradient(180deg, #fff 0%, #efefec 100%);
  color: #090909;
  box-shadow: inset 0 1px 0 #fff, inset 0 -1px 0 rgba(0,0,0,.08), 0 12px 32px rgba(0,0,0,.18);
}

.premium-button--light .premium-button__orbit {
  border-color: rgba(255,255,255,.16);
  background: #0a0a0a;
  color: #fff;
}

.premium-button--dark {
  border-color: rgba(255,255,255,.5);
  background: linear-gradient(180deg, rgba(18,18,18,.96), rgba(3,3,3,.98));
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.09), 0 14px 38px rgba(0,0,0,.22);
  backdrop-filter: blur(12px);
}

.premium-button--dark .premium-button__orbit {
  border-color: rgba(0,0,0,.08);
  background: #fff;
  color: #090909;
}

.premium-button--focus {
  border-color: rgba(255,255,255,.3);
  background: rgba(8,8,8,.68);
  color: #f7f7f4;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 12px 30px rgba(0,0,0,.16);
  backdrop-filter: blur(14px);
}

.premium-button--focus .premium-button__orbit {
  border-color: rgba(0,0,0,.08);
  background: #f5f5f2;
  color: #080808;
}

.premium-button--utility {
  --pb-height: 42px;
  --pb-icon-size: 32px;
  --pb-inset: 4px;
  min-width: 0;
  padding: 0 calc(var(--pb-icon-size) + var(--pb-inset) + 14px) 0 16px;
  border-color: rgba(255,255,255,.24);
  background: rgba(9,9,10,.52);
  color: #d2d2d2;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.055), 0 10px 26px rgba(0,0,0,.14);
  font-size: 10px;
  backdrop-filter: blur(12px);
}

.premium-button--utility .premium-button__orbit {
  border-color: rgba(255,255,255,.18);
  background: rgba(255,255,255,.1);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.12), 0 5px 14px rgba(0,0,0,.18);
}

.premium-button:is(:hover, :focus-visible) {
  border-color: rgba(255,255,255,.98);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.2), 0 17px 42px rgba(0,0,0,.26);
  transform: translate3d(0,-2px,0);
}

.premium-button:is(:hover, :focus-visible)::before { opacity: 1; }
.premium-button:is(:hover, :focus-visible)::after {
  opacity: .8;
  transform: translateX(760%) rotate(18deg);
}

.premium-button:is(:hover, :focus-visible) .premium-button__orbit {
  transform: translate3d(calc(-1 * var(--pb-travel)), -50%, 0) rotate(-5deg);
}

.premium-button:is(:hover, :focus-visible) .premium-button__label {
  transform: translateX(calc(var(--pb-icon-size) * .72));
}

.premium-button:is(:hover, :focus-visible) .premium-button__orbit svg {
  transform: translate(1px,-1px) rotate(4deg);
}

.premium-button--light:is(:hover, :focus-visible) {
  background: linear-gradient(180deg, #fff, #f7f7f4);
  color: #080808;
}

.premium-button--light:is(:hover, :focus-visible) .premium-button__orbit {
  background: #111;
  color: #fff;
  box-shadow: 0 8px 22px rgba(0,0,0,.28), inset 0 1px 0 rgba(255,255,255,.14);
}

.premium-button--dark:is(:hover, :focus-visible),
.premium-button--focus:is(:hover, :focus-visible),
.premium-button--utility:is(:hover, :focus-visible) {
  background: #f7f7f4;
  color: #080808;
}

.premium-button--dark:is(:hover, :focus-visible) .premium-button__orbit,
.premium-button--focus:is(:hover, :focus-visible) .premium-button__orbit,
.premium-button--utility:is(:hover, :focus-visible) .premium-button__orbit {
  border-color: #151515;
  background: #090909;
  color: #fff;
}

.premium-button:active {
  transform: translate3d(0,0,0) scale(.975);
  transition-duration: .12s;
}

.premium-button:focus-visible {
  outline: 2px solid rgba(255,255,255,.95);
  outline-offset: 3px;
}

.premium-button[disabled],
.premium-button[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: .5;
  pointer-events: none;
}

/* Context sizing */
.header-actions .premium-button {
  --pb-height: 44px;
  --pb-icon-size: 34px;
  --pb-inset: 4px;
  min-width: 132px;
  min-height: var(--pb-height);
  padding: 0 calc(var(--pb-icon-size) + 17px) 0 16px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 720;
  letter-spacing: .035em;
  text-transform: uppercase;
}

.hero .eyebrow.premium-button {
  --pb-height: 38px;
  --pb-icon-size: 28px;
  --pb-inset: 4px;
  min-width: 0;
  min-height: var(--pb-height);
  margin: 0 auto 25px;
  padding: 0 calc(var(--pb-icon-size) + 14px) 0 15px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  background: linear-gradient(140deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
  color: #b9b9b9;
  font-size: 9px;
  font-weight: 640;
  letter-spacing: .12em;
}

.hero .button-hero.premium-button {
  min-width: 244px;
  border-radius: 999px;
}

.intro-controls .premium-button {
  --pb-height: 38px;
  --pb-icon-size: 28px;
  --pb-inset: 4px;
  min-height: var(--pb-height);
  padding: 0 calc(var(--pb-icon-size) + 14px) 0 14px;
  border: 1px solid rgba(255,255,255,.17);
  border-radius: 999px;
  background: rgba(7,7,10,.54);
  color: #aaa7b2;
  font-size: 8px;
  font-weight: 650;
  letter-spacing: .1em;
  text-transform: uppercase;
  backdrop-filter: blur(14px);
}

.intro-controls .premium-button:is(:hover, :focus-visible) {
  border-color: rgba(255,255,255,.82);
  background: rgba(247,247,244,.96);
  color: #080808;
}

.faq-intro > a.premium-button {
  display: inline-flex;
  margin-top: 26px;
  padding-bottom: 0;
  border-bottom: 1px solid rgba(255,255,255,.24);
  color: #d2d2d2;
}

.contact-links a.premium-button {
  width: fit-content;
  max-width: 100%;
  color: #d2d2d2;
  text-transform: none;
}

.back-link.premium-button {
  margin-bottom: 60px;
  color: #d2d2d2;
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* Premium round controls for native button-like UI. */
.faq-list summary span {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 50%;
  background: rgba(255,255,255,.04);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 10px 24px rgba(0,0,0,.18);
  backdrop-filter: blur(12px);
}

.faq-list details.is-open summary span {
  border-color: #fff;
  background: #fff;
  color: #080808;
  box-shadow: 0 12px 28px rgba(0,0,0,.25);
  transform: rotate(45deg) scale(.92);
}

.menu-button {
  transition: border-color .35s ease, box-shadow .45s ease, transform .35s cubic-bezier(.16,1,.3,1);
}

.menu-button:is(:hover, :focus-visible) {
  border-color: #fff;
  box-shadow: 0 10px 28px rgba(0,0,0,.24), 0 0 0 4px rgba(255,255,255,.07);
  transform: translateY(-2px) rotate(2deg);
}

@media (max-width: 760px) {
  .premium-button {
    --pb-height: 52px;
    --pb-icon-size: 40px;
    --pb-inset: 5px;
    max-width: 100%;
    min-height: var(--pb-height);
  }

  .button-row .premium-button,
  .cta-box .premium-button,
  .contact-form .premium-button {
    width: 100%;
  }

  .hero .button-row .premium-button {
    width: auto;
    min-width: 228px;
  }

  .hero .eyebrow.premium-button {
    --pb-height: 36px;
    --pb-icon-size: 27px;
    min-height: var(--pb-height);
    margin-bottom: 21px;
    font-size: 7px;
  }

  .intro-controls {
    gap: 10px;
  }

  .intro-controls .premium-button {
    --pb-height: 36px;
    --pb-icon-size: 27px;
    min-height: var(--pb-height);
    font-size: 7px;
  }

  .contact-links a.premium-button {
    width: 100%;
  }
}

/* v25 — three deliberately different button systems from the supplied videos. */

/* 01 / FLOW: outlined monochrome capsule, full-surface inversion, free arrow. */
.premium-button--flow {
  --pb-icon-size: 19px;
  border-color: rgba(255,255,255,.72);
  background: rgba(4,4,4,.72);
  color: #f7f7f4;
  padding-right: 46px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.07), 0 12px 32px rgba(0,0,0,.16);
  backdrop-filter: blur(12px);
}

.premium-button--flow::before {
  background: #f7f7f4;
  opacity: 0;
}

.premium-button--flow::after {
  display: none;
}

.premium-button--flow .premium-button__orbit {
  width: var(--pb-icon-size);
  height: var(--pb-icon-size);
  border: 0;
  background: transparent;
  color: currentColor;
  box-shadow: none;
}

.premium-button--flow .premium-button__orbit::before {
  display: none;
}

.premium-button--flow:is(:hover, :focus-visible) {
  border-color: #f7f7f4;
  background: #f7f7f4;
  color: #080808;
  box-shadow: 0 17px 38px rgba(0,0,0,.26), 0 0 0 1px rgba(255,255,255,.1);
}

.premium-button--flow:is(:hover, :focus-visible)::before {
  opacity: 1;
}

.premium-button--flow:is(:hover, :focus-visible) .premium-button__label {
  transform: translateX(25px);
}

.premium-button--flow:is(:hover, :focus-visible) .premium-button__orbit {
  color: #080808;
  transform: translate3d(calc(-1 * var(--pb-travel)), -50%, 0) rotate(-8deg);
}

.button-dark.premium-button--flow {
  border-color: #0a0a0a;
  background: #0a0a0a;
  color: #fff;
}

.button-dark.premium-button--flow:is(:hover, :focus-visible) {
  border-color: #0a0a0a;
  background: #fff;
  color: #090909;
}

.premium-button--flow.premium-button--utility {
  --pb-height: 42px;
  --pb-icon-size: 18px;
  --pb-inset: 13px;
  padding-right: 45px;
  background: rgba(7,7,8,.58);
}

.premium-button--flow.premium-button--utility .premium-button__orbit {
  border: 0;
  background: transparent;
  color: currentColor;
  box-shadow: none;
}

.premium-button--flow.premium-button--utility:is(:hover, :focus-visible) {
  background: #f7f7f4;
  color: #080808;
}

.hero .eyebrow.premium-button--flow {
  --pb-icon-size: 16px;
  --pb-inset: 12px;
  padding-right: 42px;
}

/* 02 / ORBIT: white capsule with a dark circular control travelling edge-to-edge. */
.premium-button--orbit {
  --pb-icon-size: 42px;
  --pb-inset: 5px;
  border-color: rgba(255,255,255,.94);
  background: linear-gradient(180deg,#fff 0%,#ecece8 100%);
  color: #080808;
  box-shadow: inset 0 1px 0 #fff, inset 0 -1px 0 rgba(0,0,0,.09), 0 13px 34px rgba(0,0,0,.2);
}

.premium-button--orbit::before {
  background: radial-gradient(circle 100px at var(--pb-pointer-x) var(--pb-pointer-y), rgba(255,255,255,.76), transparent 72%);
}

.premium-button--orbit .premium-button__orbit {
  border-color: rgba(255,255,255,.13);
  background: #0a0a0a;
  color: #fff;
  box-shadow: 0 7px 18px rgba(0,0,0,.24), inset 0 1px 0 rgba(255,255,255,.16);
}

.premium-button--orbit:is(:hover, :focus-visible) {
  border-color: #fff;
  background: linear-gradient(180deg,#fff,#f7f7f4);
  color: #080808;
}

.premium-button--orbit:is(:hover, :focus-visible) .premium-button__orbit {
  border-color: #151515;
  background: #0a0a0a;
  color: #fff;
  transform: translate3d(calc(-1 * var(--pb-travel)), -50%, 0) rotate(-8deg);
}

.premium-button--orbit:is(:hover, :focus-visible) .premium-button__label {
  transform: translateX(calc(var(--pb-icon-size) * .72));
}

/* 03 / MORPH: a floating violet arrow expands into the “Подробнее” pill. */
.premium-button--morph {
  --pb-closed-size: 54px;
  --pb-icon-size: 40px;
  --pb-inset: 7px;
  width: var(--pb-closed-size);
  min-width: var(--pb-closed-size);
  max-width: 182px;
  padding: 0;
  border-color: transparent;
  background: transparent;
  color: #fff;
  box-shadow: none;
  perspective: 600px;
  transition:
    width .76s cubic-bezier(.16,1,.3,1),
    color .45s ease,
    transform .35s cubic-bezier(.16,1,.3,1);
}

.premium-button--morph::before {
  inset: 0;
  border: 1px solid rgba(197,186,255,.48);
  background:
    radial-gradient(circle 110px at var(--pb-pointer-x) var(--pb-pointer-y), rgba(255,255,255,.2), transparent 68%),
    linear-gradient(135deg,#3213a7 0%,#5933dc 48%,#7a58ff 100%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.24), 0 16px 36px rgba(43,20,141,.28);
  opacity: 1;
  transform: scaleX(1);
  transform-origin: center;
  transition: border-color .4s ease, box-shadow .55s ease, background .55s ease;
}

.premium-button--morph::after {
  display: none;
}

.premium-button--morph .premium-button__label {
  position: absolute;
  left: 22px;
  opacity: 0;
  filter: blur(7px);
  transform: translateX(-9px) scale(.96);
  text-shadow: 0 1px 12px rgba(0,0,0,.25);
}

.premium-button--morph .premium-button__orbit {
  border-color: rgba(255,255,255,.32);
  background: rgba(8,6,20,.32);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.17), 0 8px 20px rgba(18,8,65,.28);
  backdrop-filter: blur(8px);
}

.premium-button--morph:is(:hover, :focus-visible) {
  width: 182px;
  border-color: transparent;
  background: transparent;
  color: #fff;
  box-shadow: none;
}

.premium-button--morph:is(:hover, :focus-visible)::before {
  border-color: rgba(215,207,255,.75);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.28), 0 18px 42px rgba(73,34,229,.36);
  opacity: 1;
  transform: scaleX(1);
}

.premium-button--morph:is(:hover, :focus-visible) .premium-button__label {
  opacity: 1;
  filter: blur(0);
  transform: translateX(0) scale(1);
}

.premium-button--morph:is(:hover, :focus-visible) .premium-button__orbit {
  border-color: rgba(255,255,255,.42);
  background: rgba(18,8,66,.22);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.17), 0 8px 20px rgba(18,8,65,.28);
  transform: translate3d(0, -50%, 0) rotate(-4deg) scale(1.03);
}

@media (max-width: 760px) {
  .premium-button--flow {
    --pb-icon-size: 19px;
    padding-right: 46px;
  }

  .premium-button--orbit {
    --pb-icon-size: 40px;
  }

  .premium-button--morph {
    --pb-icon-size: 40px;
  }

  .premium-button--flow.premium-button--utility,
  .hero .eyebrow.premium-button--flow {
    --pb-icon-size: 17px;
  }
}

@media (hover: none), (pointer: coarse) {
  .premium-button--morph {
    width: 182px;
    min-width: 182px;
  }

  .premium-button--morph .premium-button__label {
    opacity: 1;
    filter: none;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .premium-button--morph::before,
  .premium-button--morph .premium-button__label,
  .premium-button--morph .premium-button__orbit {
    transition-duration: .01ms !important;
  }
}