:root {
  --ink: #07282f;
  --ink-soft: #0d3d47;
  --foam: #e8f4f1;
  --mist: #b7d4cc;
  --accent: #f0b429;
  --accent-deep: #d4920f;
  --line: rgba(232, 244, 241, 0.18);
  --font-display: "Syne", sans-serif;
  --font-body: "Outfit", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--foam);
  background: var(--ink);
  line-height: 1.55;
  overflow-x: hidden;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 90% 60% at 10% -10%, rgba(240, 180, 41, 0.22), transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 20%, rgba(61, 140, 150, 0.35), transparent 50%),
    radial-gradient(ellipse 80% 70% at 50% 110%, rgba(13, 61, 71, 0.9), transparent 60%),
    linear-gradient(165deg, #041c22 0%, #0a3540 45%, #06303a 100%);
}

.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
  pointer-events: none;
}

.site-header {
  padding: 1.25rem clamp(1.25rem, 4vw, 3rem);
}

.logo {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--mist);
}

.hero {
  min-height: calc(100vh - 4rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem clamp(1.25rem, 4vw, 3rem) 4rem;
  max-width: 1100px;
  animation: rise 0.9s ease-out both;
}

.hero-brand {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.75rem, 9vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--foam);
}

.hero-title {
  margin: 0 0 1rem;
  max-width: 16ch;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  line-height: 1.25;
  color: var(--accent);
}

.hero-lead {
  margin: 0;
  max-width: 36ch;
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--mist);
}

.hero-signal {
  margin-top: clamp(2.5rem, 8vh, 4.5rem);
  max-width: 480px;
  color: rgba(240, 180, 41, 0.55);
}

.hero-signal svg {
  width: 100%;
  height: auto;
  display: block;
}

.signal-arc {
  opacity: 0;
  animation: pulse-arc 2.8s ease-in-out infinite;
}

.signal-arc.a1 {
  animation-delay: 0s;
}

.signal-arc.a2 {
  animation-delay: 0.35s;
}

.signal-arc.a3 {
  animation-delay: 0.7s;
}

.signal-line {
  opacity: 0.45;
  stroke-dasharray: 200;
  stroke-dashoffset: 200;
  animation: draw-line 1.4s 0.4s ease-out forwards;
}

.signal-dot {
  animation: blink 2.8s ease-in-out infinite;
}

.section {
  padding: 4.5rem clamp(1.25rem, 4vw, 3rem);
  max-width: 1100px;
  margin: 0 auto;
  animation: rise 0.8s ease-out both;
  animation-delay: 0.15s;
}

.section h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  letter-spacing: -0.02em;
}

.section-lead {
  margin: 0 0 2.5rem;
  max-width: 52ch;
  font-size: 1.05rem;
  color: var(--mist);
}

.section-lead strong {
  color: var(--foam);
  font-weight: 600;
}

.plans-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.plan {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line);
}

.plan h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--accent);
}

.plan p {
  margin: 0;
  max-width: 48ch;
  color: var(--mist);
}

.plan-note {
  margin-top: 0.75rem !important;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(232, 244, 241, 0.55);
}

.about {
  padding-bottom: 5rem;
}

.site-footer {
  padding: 1.5rem clamp(1.25rem, 4vw, 3rem) 2.5rem;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
  font-size: 0.9rem;
  color: rgba(183, 212, 204, 0.7);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse-arc {
  0%,
  100% {
    opacity: 0.15;
  }
  50% {
    opacity: 0.75;
  }
}

@keyframes draw-line {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes blink {
  0%,
  100% {
    opacity: 0.4;
  }
  50% {
    opacity: 1;
  }
}

@media (min-width: 800px) {
  .plans-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 0 2.5rem;
    border-top: none;
  }

  .plan {
    padding: 0 0 0 1.5rem;
    border-bottom: none;
    border-left: 1px solid var(--line);
  }

  .plan:first-child {
    padding-left: 0;
    border-left: none;
  }
}

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

  .signal-line {
    stroke-dashoffset: 0;
    opacity: 0.45;
  }

  .signal-arc {
    opacity: 0.5;
  }
}