/* ===== Design tokens ===== */
:root {
  --color-bg: #0b0d17;
  --color-bg-soft: #11142180;
  --color-surface: #161a2c;
  --color-surface-2: #1c2138;
  --color-border: #262b45;
  --color-text: #f3f5ff;
  --color-text-muted: #9aa3c4;
  --color-accent: #7c5cff;
  --color-accent-2: #4ac8ff;
  --gradient-accent: linear-gradient(135deg, #7c5cff 0%, #4ac8ff 100%);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-glow: 0 20px 60px -20px rgba(124, 92, 255, 0.45);
  --container: 1140px;
}

/* ===== Base ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  interpolate-size: allow-keywords;
}

.page {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  background-image:
    radial-gradient(72% 68% at 50% -6%, rgba(124, 92, 255, 0.22) 0%, transparent 72%),
    radial-gradient(46% 46% at 88% 6%, rgba(74, 200, 255, 0.14) 0%, transparent 70%),
    radial-gradient(42% 42% at 6% 16%, rgba(124, 92, 255, 0.10) 0%, transparent 72%);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* ===== Logo ===== */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 22px;
}

.logo__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 18px;
}

.logo__text {
  font-weight: 300;
  letter-spacing: 0.22em;
}

.logo--footer {
  font-size: 20px;
}

/* ===== Buttons ===== */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}

.button:hover {
  transform: translateY(-2px);
}

.button--accent {
  position: relative;
  overflow: hidden;
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.button--accent::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 55%;
  height: 100%;
  background: linear-gradient(100deg, transparent 20%, rgba(255, 255, 255, 0.5) 50%, transparent 80%);
  transform: translateX(-180%) skewX(-20deg);
  animation: btn-shine 4.5s ease-in-out infinite;
  pointer-events: none;
}

@keyframes btn-shine {
  0% { transform: translateX(-180%) skewX(-20deg); }
  55%, 100% { transform: translateX(320%) skewX(-20deg); }
}

.button--accent:hover {
  box-shadow: 0 24px 70px -18px rgba(124, 92, 255, 0.6);
}

.button--ghost {
  background: var(--color-surface-2);
  color: var(--color-text);
  border-color: var(--color-border);
}

.button--ghost:hover {
  border-color: var(--color-accent);
}

.button--outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.button--outline:hover {
  border-color: var(--color-accent);
  background: var(--color-surface-2);
}

.button--lg {
  padding: 15px 32px;
  font-size: 16px;
}

/* ===== Header ===== */
.header {
  position: relative;
  background: transparent;
  border-bottom: none;
  z-index: 10;
}

.header__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px 24px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
}

.header__logo {
  justify-self: start;
}

.header__nav {
  justify-self: center;
}

.header__cta {
  justify-self: end;
}

/* ===== Burger (mobile only) ===== */
.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  justify-self: end;
  cursor: pointer;
}

.nav-burger span {
  display: block;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-text);
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.nav-toggle:checked ~ .nav-burger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle:checked ~ .nav-burger span:nth-child(2) {
  opacity: 0;
}

.nav-toggle:checked ~ .nav-burger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Nav ===== */
.nav__list {
  display: flex;
  gap: 8px;
}

.nav__link {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 999px;
  color: var(--color-text-muted);
  font-weight: 500;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav__link:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* ===== Hero ===== */
.hero {
  padding: 128px 24px 104px;
}

.hero__inner {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 34px;
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-2);
  box-shadow: 0 0 0 0 rgba(74, 200, 255, 0.55);
  animation: pulse-dot 2.2s ease-out infinite;
}

@keyframes pulse-dot {
  0% { box-shadow: 0 0 0 0 rgba(74, 200, 255, 0.55); }
  70% { box-shadow: 0 0 0 10px rgba(74, 200, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 200, 255, 0); }
}

.hero__title {
  margin: 0 0 24px;
  font-size: clamp(44px, 6.5vw, 76px);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -0.035em;
}

.hero__accent {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__subtitle {
  margin: 0 auto 40px;
  max-width: 600px;
  font-size: 20px;
  line-height: 1.65;
  color: var(--color-text-muted);
}

.hero__actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Hero social proof ===== */
.hero__proof {
  margin-top: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__avatars {
  display: flex;
}

.hero__avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  border: 2px solid var(--color-bg);
  margin-left: -12px;
}

.hero__avatar:first-child {
  margin-left: 0;
}

.hero__proof-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.3;
}

.hero__proof-stars {
  color: #ffc53d;
  letter-spacing: 2px;
  font-size: 15px;
}

.hero__proof-label {
  font-size: 14px;
  color: var(--color-text-muted);
}

.hero__proof-label strong {
  color: var(--color-text);
  font-weight: 700;
}

/* ===== Metrics ===== */
.metrics {
  padding: 12px 24px 40px;
}

.metrics__inner {
  max-width: var(--container);
  margin: 0 auto;
}

.metrics__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.metric-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 28px 20px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.metric-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

.metric-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(74, 200, 255, 0.14);
  color: var(--color-accent-2);
  margin-bottom: 16px;
}

.metric-card__icon svg {
  width: 26px;
  height: 26px;
}

.metric-card__value {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.metric-card__label {
  margin-top: 4px;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ===== Section head ===== */
.section-head {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 56px;
}

.section-head__title {
  margin: 0 0 14px;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-head__subtitle {
  margin: 0;
  font-size: 17px;
  color: var(--color-text-muted);
}

/* ===== Features ===== */
.features {
  padding: 80px 24px;
}

.features__inner {
  max-width: var(--container);
  margin: 0 auto;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.feature-card {
  padding: 30px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  background: var(--color-surface-2);
}

.feature-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(124, 92, 255, 0.14);
  font-size: 24px;
  margin-bottom: 18px;
}

.feature-card__title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 700;
}

.feature-card__text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 15px;
}

/* ===== Reviews ===== */
.reviews {
  padding: 80px 0;
  overflow: hidden;
}

.reviews__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.marquee {
  display: flex;
  flex-direction: column;
  gap: 20px;
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 7%, #000 93%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 7%, #000 93%, transparent 100%);
}

.marquee__row {
  display: flex;
  overflow: hidden;
}

.marquee__track {
  display: flex;
  flex-shrink: 0;
  gap: 20px;
  padding-right: 20px; /* trailing gap keeps the loop seam seamless */
  animation: marquee-scroll 55s linear infinite;
  will-change: transform;
}

.marquee__row--right .marquee__track {
  animation-direction: reverse;
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.review-card {
  flex: 0 0 340px;
  width: 340px;
  padding: 24px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.review-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.review-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.review-card__avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
}

.review-card__avatar--g1 { background: linear-gradient(135deg, #7c5cff, #4ac8ff); }
.review-card__avatar--g2 { background: linear-gradient(135deg, #f472b6, #7c5cff); }
.review-card__avatar--g3 { background: linear-gradient(135deg, #4ac8ff, #22d3ee); }
.review-card__avatar--g4 { background: linear-gradient(135deg, #34d399, #4ac8ff); }
.review-card__avatar--g5 { background: linear-gradient(135deg, #fbbf24, #f472b6); }
.review-card__avatar--g6 { background: linear-gradient(135deg, #60a5fa, #7c5cff); }

.review-card__name {
  font-weight: 600;
  font-size: 16px;
}

.review-card__stars {
  margin-left: auto;
  font-size: 15px;
  letter-spacing: 2px;
  color: #ffc53d;
  white-space: nowrap;
}

.review-card__star-off {
  color: var(--color-border);
}

.review-card__text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.6;
}

@media (prefers-reduced-motion: reduce) {
  .marquee__track,
  .hero__badge-dot,
  .button--accent::after {
    animation: none;
  }
  .marquee__row {
    overflow-x: auto;
    scrollbar-width: none;
  }
  .marquee__row::-webkit-scrollbar {
    display: none;
  }
}

/* ===== Download ===== */
.download {
  padding: 80px 24px;
}

.download__inner {
  max-width: var(--container);
  margin: 0 auto;
}

.download__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.platform-card {
  padding: 28px 20px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.platform-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

.platform-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin: 0 auto;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.18), rgba(74, 200, 255, 0.18));
  color: var(--color-text);
  transition: background 0.2s ease, color 0.2s ease;
}

.platform-card__icon svg {
  width: 30px;
  height: 30px;
}

.platform-card:hover .platform-card__icon {
  background: var(--gradient-accent);
  color: #fff;
}

.platform-card__title {
  margin: 14px 0 4px;
  font-size: 18px;
  font-weight: 700;
}

.platform-card__meta {
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--color-text-muted);
}

.platform-card__btn {
  width: 100%;
}

/* ===== FAQ ===== */
.faq {
  padding: 80px 24px;
}

.faq__inner {
  max-width: 800px;
  margin: 0 auto;
}

.faq__list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq__item {
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 4px 24px;
  transition: border-color 0.2s ease;
}

.faq__item[open] {
  border-color: var(--color-accent);
}

.faq__question {
  list-style: none;
  cursor: pointer;
  padding: 18px 0;
  font-weight: 600;
  font-size: 17px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__question::after {
  content: "+";
  font-size: 22px;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

.faq__item[open] .faq__question::after {
  content: "−";
}

.faq__answer {
  margin: 0;
  padding: 0 0 20px;
  color: var(--color-text-muted);
  font-size: 15px;
}

/* Плавное раскрытие/закрытие на чистом CSS */
.faq__item::details-content {
  height: 0;
  overflow: hidden;
  transition: height 0.3s ease, content-visibility 0.3s ease allow-discrete;
}

.faq__item[open]::details-content {
  height: auto;
}

/* ===== CTA ===== */
.cta {
  padding: 40px 24px 100px;
}

.cta__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px 32px;
  text-align: center;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(80% 120% at 50% 0%, rgba(124, 92, 255, 0.35) 0%, transparent 70%),
    var(--color-surface);
  border: 1px solid var(--color-border);
}

.cta__title {
  margin: 0 0 14px;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.cta__text {
  margin: 0 auto 32px;
  max-width: 480px;
  font-size: 17px;
  color: var(--color-text-muted);
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--color-border);
  background: #090b13;
}

.footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 36px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
}

.footer__tagline {
  margin: 16px 0 0;
  max-width: 280px;
  color: var(--color-text-muted);
  font-size: 15px;
}

.footer__heading {
  margin: 0 0 16px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__link {
  color: var(--color-text);
  font-size: 15px;
  transition: color 0.2s ease;
}

.footer__link:hover {
  color: var(--color-accent);
}

.footer__bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding: 22px 24px;
  border-top: 1px solid var(--color-border);
}

.footer__copy {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .download__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .metrics__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer__inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  .header__inner {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
  .nav-burger {
    display: flex;
  }
  .header__cta {
    display: none;
  }
  .header__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    height: 0;
    overflow: hidden;
    background: var(--color-surface);
    transition: height 0.3s ease;
  }
  .nav-toggle:checked ~ .header__nav {
    height: auto;
  }
  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px 24px;
  }
  .nav__link {
    display: block;
    text-align: left;
  }
}

@media (max-width: 560px) {
  .features__grid,
  .download__grid {
    grid-template-columns: 1fr;
  }
  .review-card {
    flex-basis: 300px;
    width: 300px;
  }
  .footer__inner {
    grid-template-columns: 1fr;
  }
  .metrics__grid {
    grid-template-columns: 1fr;
  }
}