:root {
  --ah-red: #d9001b;
  --ah-red-deep: #9f0014;
  --ah-ink: #0b1220;
  --ah-muted: #5b6b7c;
  --ah-ice: #e8f1f8;
  --ah-paper: #f7fafc;
  --ah-line: rgba(15, 23, 42, 0.1);
  --font-display: "Syne", "Manrope", system-ui, sans-serif;
  --font-body: "Manrope", system-ui, -apple-system, sans-serif;
  --max: 72rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ah-ink);
  background: var(--ah-paper);
  line-height: 1.55;
  min-height: 100vh;
  overflow-x: hidden;
}

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

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: #fff;
  padding: 0.5rem 0.75rem;
  z-index: 100;
}
.skip:focus { left: 0.75rem; top: 0.75rem; }

/* —— Hero —— */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  color: #fff;
  isolation: isolate;
}

.hero__plane {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(165deg, rgba(8, 12, 20, 0.55) 0%, rgba(8, 12, 20, 0.78) 48%, rgba(8, 12, 20, 0.92) 100%),
    radial-gradient(ellipse 80% 55% at 70% 20%, rgba(217, 0, 27, 0.35), transparent 55%),
    radial-gradient(ellipse 60% 40% at 15% 80%, rgba(120, 180, 220, 0.18), transparent 50%),
    linear-gradient(180deg, #1a2332 0%, #0b1220 100%);
  overflow: hidden;
}

.hero__ice {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.04) 50%, transparent 100%),
    repeating-linear-gradient(
      105deg,
      transparent 0,
      transparent 46px,
      rgba(255, 255, 255, 0.03) 46px,
      rgba(255, 255, 255, 0.03) 48px
    );
  mix-blend-mode: screen;
  opacity: 0.7;
  animation: ice-drift 18s linear infinite;
}

.hero__glow {
  position: absolute;
  width: min(70vw, 36rem);
  height: min(70vw, 36rem);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217, 0, 27, 0.45), transparent 68%);
  filter: blur(8px);
  top: 8%;
  right: -8%;
  animation: glow-pulse 7s var(--ease) infinite alternate;
  pointer-events: none;
}

@keyframes ice-drift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-48px, 12px, 0); }
}

@keyframes glow-pulse {
  from { opacity: 0.65; transform: scale(1); }
  to { opacity: 1; transform: scale(1.08); }
}

.hero__inner {
  width: min(100% - 2rem, 42rem);
  margin: 0 auto;
  padding: 5.5rem 0 3.25rem;
}

.hero__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.85rem;
  margin: 0 0 1.5rem;
}

.hero__logo {
  width: clamp(7.5rem, 28vw, 11rem);
  height: auto;
  filter: drop-shadow(0 18px 40px rgba(0, 0, 0, 0.45));
  animation: logo-in 0.9s var(--ease) both;
}
.hero__logo--wide {
  width: clamp(12rem, 52vw, 20rem);
}

.hero__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 9vw, 4.25rem);
  letter-spacing: -0.04em;
  line-height: 0.95;
  text-transform: uppercase;
  animation: rise 0.85s var(--ease) 0.12s both;
}

.hero__tag {
  margin: 0;
  max-width: 28rem;
  font-size: clamp(1.02rem, 2.6vw, 1.2rem);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.88);
  animation: rise 0.85s var(--ease) 0.22s both;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.65rem;
  margin: 1.6rem 0 0;
  animation: rise 0.85s var(--ease) 0.34s both;
}

.hero__ctas .btn {
  min-height: 3rem;
  padding: 0.85rem 1.35rem;
  font-size: 0.95rem;
  line-height: 1.15;
}

@keyframes logo-in {
  from { opacity: 0; transform: translateY(18px) scale(0.94); }
  to { opacity: 1; transform: none; }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: none; }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.85rem;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  font: inherit;
  font-weight: 800;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 160ms var(--ease), filter 160ms var(--ease), background 160ms ease;
}

.btn:hover { transform: translateY(-1px); filter: brightness(1.05); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(165deg, #ef2540 0%, var(--ah-red) 42%, var(--ah-red-deep) 100%);
  color: #fff;
  /* Tight glow — a large shadow reads as a taller/wider control next to ghost. */
  box-shadow: 0 6px 18px rgba(217, 0, 27, 0.34);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.34);
  backdrop-filter: blur(8px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
}

.btn--ink {
  background: var(--ah-ink);
  color: #fff;
}

.btn--outline {
  background: #fff;
  color: var(--ah-ink);
  border-color: var(--ah-line);
}

/* —— Sections —— */
.section {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding: 4.25rem 0;
}

.section__kicker {
  margin: 0 0 0.45rem;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ah-red);
}

.section__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.45rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.section__lead {
  margin: 0;
  max-width: 38rem;
  color: var(--ah-muted);
  font-size: 1.05rem;
}

.split {
  display: grid;
  gap: 1.75rem;
}

@media (min-width: 860px) {
  .split {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 3rem;
  }
}

.feature-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.feature-list li {
  position: relative;
  padding: 0.95rem 1rem 0.95rem 3rem;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--ah-line);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
}

.feature-list li::before {
  content: attr(data-n);
  position: absolute;
  left: 0.85rem;
  top: 0.95rem;
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 999px;
  background: var(--ah-red);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  display: grid;
  place-items: center;
}

.feature-list strong {
  display: block;
  margin-bottom: 0.15rem;
  font-size: 1rem;
}

.feature-list span {
  color: var(--ah-muted);
  font-size: 0.92rem;
}

.panel {
  border-radius: 22px;
  padding: 1.5rem 1.35rem;
  background:
    linear-gradient(160deg, rgba(217, 0, 27, 0.08), transparent 40%),
    linear-gradient(180deg, #fff, var(--ah-ice));
  border: 1px solid var(--ah-line);
}

.panel h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
}

.panel p {
  margin: 0 0 1rem;
  color: var(--ah-muted);
  font-size: 0.95rem;
}

.panel__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.band {
  background: linear-gradient(180deg, #0f172a 0%, #152033 100%);
  color: #fff;
}

.band .section__kicker { color: #ff8a9a; }
.band .section__lead { color: rgba(255, 255, 255, 0.72); }

.install-grid {
  display: grid;
  gap: 0.85rem;
  margin-top: 1.5rem;
}

@media (min-width: 720px) {
  .install-grid { grid-template-columns: 1fr 1fr; }
}

.install-link {
  display: block;
  padding: 1.15rem 1.2rem;
  border-radius: 16px;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: background 160ms ease, transform 160ms var(--ease);
}

.install-link:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.install-link strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}

.install-link span {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.site-footer {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
  padding: 2rem 0 2.75rem;
  border-top: 1px solid var(--ah-line);
  color: var(--ah-muted);
  font-size: 0.86rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.1rem;
  margin: 0.75rem 0 1rem;
}

.site-footer a {
  font-weight: 700;
  text-decoration: none;
  color: var(--ah-ink);
}

.site-footer a:hover { color: var(--ah-red); }

/* —— Language —— */
.lang-bar {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 2;
}
.lang-switch {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
}
.lang-switch__label {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
}
.lang-switch__group {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem;
  max-width: min(100vw - 2rem, 22rem);
}
.lang-switch__btn {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.28rem 0.5rem;
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: background 140ms ease, border-color 140ms ease;
}
.lang-switch__btn:hover {
  background: rgba(255, 255, 255, 0.16);
}
.lang-switch__btn.is-active {
  background: #fff;
  color: var(--ah-ink);
  border-color: #fff;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}