:root {
  --font-rounded: ui-rounded, "SF Pro Rounded", "Segoe UI Rounded",
    "Nunito Sans", "Arial Rounded MT Bold", Arial, "Helvetica Neue",
    sans-serif;

  --ink: #232238;
  --ink-soft: #3d3c4d;

  --btn-official-shadow: rgba(40, 90, 140, 0.28);
  --btn-telegram-shadow: rgba(20, 20, 30, 0.32);
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-rounded);
  color: var(--ink);
  background-color: #bcdcf2;
  background-image: url("assets/bg-desktop.jpg");
  background-size: cover;
  background-position: top center;
  background-repeat: no-repeat;
  display: flex;
  flex-direction: column;
}

@media (max-width: 750px) {
  body {
    background-image: url("assets/bg-mobile.jpg");
  }
}

a {
  font-family: inherit;
}

.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1.1rem;
  padding: 2.5rem 1.25rem 2rem;
}

.brand {
  margin: 0;
  display: flex;
  justify-content: center;
}

.brand-logo {
  display: block;
  width: clamp(130px, 30vw, 240px);
  height: auto;
  filter: drop-shadow(0 10px 18px rgba(61, 61, 80, 0.25));
}

.tagline {
  margin: 0;
  max-width: 34ch;
  font-size: clamp(1rem, 2.6vw, 1.2rem);
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink-soft);
}

.actions {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
  max-width: 360px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 1.05rem 1.5rem;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.7);
  font-family: inherit;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  background-repeat: no-repeat;
  background-size: 14px 14px, 100% 100%;
  background-image: radial-gradient(
      rgba(255, 255, 255, 0.45) 1px,
      transparent 1.6px
    ),
    var(--btn-gradient);
  box-shadow: 0 0.7rem 1.6rem var(--btn-shadow);
}

.btn:hover {
  box-shadow: 0 1.1rem 2.2rem var(--btn-shadow);
}

.btn:focus-visible {
  outline: 3px solid #ffffff;
  outline-offset: 3px;
  box-shadow: 0 0 0 6px rgba(29, 59, 86, 0.35);
}

.btn--official {
  color: #163456;
  --btn-gradient: linear-gradient(180deg, #e9fcff 0%, #9adcf4 55%, #6fc1ea 100%);
  --btn-shadow: var(--btn-official-shadow);
}

.btn--telegram {
  color: #ffffff;
  --btn-gradient: linear-gradient(180deg, #4a4960 0%, #2a2938 55%, #1c1b26 100%);
  --btn-shadow: var(--btn-telegram-shadow);
}

.disclaimer {
  margin: 0 auto;
  max-width: 560px;
  padding: 0 1.25rem 2rem;
  text-align: center;
}

.disclaimer p {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

@media (min-width: 480px) {
  .hero {
    padding: 3rem 1.5rem 2.5rem;
    gap: 1.3rem;
  }
}

@media (min-width: 560px) {
  .actions {
    flex-direction: row;
    justify-content: center;
    max-width: none;
  }

  .btn {
    width: auto;
    min-width: 200px;
  }
}

@media (min-width: 768px) {
  .hero {
    padding: 4rem 2rem 3rem;
    gap: 1.6rem;
  }

  .tagline {
    max-width: 42ch;
  }

  .btn {
    padding: 1.15rem 2.25rem;
    font-size: 1.12rem;
    min-width: 220px;
  }
}

@media (min-width: 1024px) {
  .hero {
    padding: 4.5rem 2rem;
    gap: 1.8rem;
  }

  .actions {
    gap: 1.5rem;
  }

  .btn {
    min-width: 240px;
  }
}

@media (min-width: 1440px) {
  .hero {
    max-width: 1100px;
    margin: 0 auto;
    padding: 5rem 2rem;
  }

  .tagline {
    font-size: 1.3rem;
    max-width: 46ch;
  }
}

@media (max-width: 360px) {
  .btn {
    padding: 0.95rem 1.25rem;
    font-size: 0.98rem;
  }
}