:root {
  color-scheme: dark;
  --bg: #0b0b0f;
  --surface: #18181f;
  --surface-hover: #1d1d25;
  --border: #2b2b38;
  --text: #f4f4f5;
  --muted: #adadb6;
  --soft: #81818b;
  --primary: #6c5cff;
  --primary-hover: #7c6dff;
  --primary-border: rgba(108, 92, 255, 0.35);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.5;
}

.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 78% -10%, rgba(108, 92, 255, 0.2), transparent 34%),
    radial-gradient(circle at -10% 75%, rgba(184, 255, 61, 0.05), transparent 25%);
}

.brand,
.hero,
.content {
  position: relative;
  z-index: 1;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  width: min(100% - 32px, 760px);
  margin: 0 auto;
  padding: 22px 0 0;
  color: #fff;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.04em;
}

.back-link,
.back-link:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 5px;
  flex: 0 0 auto;
  color: #fff !important;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  text-decoration: none !important;
}

.button-arrow { font-size: 26px; font-weight: 700; line-height: 1; }

.back-link:hover,
.back-link:focus-visible {
  color: #fff;
  opacity: 0.72;
}

.hero {
  border-bottom: 1px solid var(--border);
}

.hero__inner,
.content {
  width: min(100% - 32px, 760px);
  margin: 0 auto;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 0;
  padding: 36px 0 40px;
  text-align: left;
}

.hero__copy {
  width: 100%;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(36px, 6vw, 54px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.hero__description {
  max-width: 500px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.55;
}

.content {
  padding: 28px 0 calc(64px + env(safe-area-inset-bottom));
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 7px;
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--soft);
  font-size: 12px;
  line-height: 1.45;
}

.site-footer a { color: var(--muted); text-underline-offset: 3px; }
.site-footer a:hover, .site-footer a:focus-visible { color: var(--text); }

.materials {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.material {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  min-height: 76px;
  padding: 13px 14px 13px 20px;
  border-bottom: 1px solid var(--border);
  transition: background 0.16s ease;
}

.material:last-child {
  border-bottom: 0;
}

.material:hover {
  background: var(--surface-hover);
}

.material__title {
  position: relative;
  margin: 0;
  padding-left: 15px;
  font-size: 15px;
  font-weight: 650;
  line-height: 1.4;
}

.material__title::before {
  content: "";
  position: absolute;
  top: 0.58em;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 12px rgba(108, 92, 255, 0.55);
}

.material__telegram-copy p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.material--telegram {
  grid-template-columns: minmax(0, 1fr);
}

.material--telegram .material__title {
  padding-left: 0;
  color: #ffffff;
}

.material--telegram .material__title::before {
  content: none;
}

.material__telegram-copy a {
  color: #bdb6ff;
  text-decoration-color: rgba(189, 182, 255, 0.55);
  text-underline-offset: 3px;
}

.material__telegram-copy a:hover,
.material__telegram-copy a:focus-visible {
  color: #fff;
}

.material__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 13px;
  border: 1px solid var(--primary-border);
  border-radius: 12px;
  background: rgba(108, 92, 255, 0.1);
  color: #c9c4ff;
  font: 700 13px/1 inherit;
  text-decoration: none;
  transition: border-color 0.14s ease, background 0.14s ease, color 0.14s ease;
}

.material__button:hover {
  border-color: var(--primary);
  background: rgba(108, 92, 255, 0.2);
  color: #fff;
}

.material__button:focus-visible {
  outline: 3px solid rgba(108, 92, 255, 0.48);
  outline-offset: 3px;
}

.empty {
  padding: 28px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}

.notice {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 2;
  max-width: min(360px, calc(100vw - 40px));
  padding: 13px 16px;
  border: 1px solid var(--primary-border);
  border-radius: 13px;
  background: #252334;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.3);
  color: var(--text);
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.notice.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 640px) {
  .brand {
    padding-top: 18px;
    font-size: 14px;
  }

  .back-link {
    align-self: center;
    transform: translateY(-2px);
  }

  .hero__inner {
    padding: 26px 0 28px;
    text-align: left;
  }

  h1 {
    margin: 0 0 8px;
    font-size: 36px;
  }

  .hero__description {
    font-size: 16px;
    line-height: 1.55;
  }

  .content {
    padding-top: 18px;
  }

  .material {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    min-height: 82px;
    padding: 14px 13px 14px 16px;
  }

  .material__title {
    font-size: 16px;
    line-height: 1.4;
  }

  .material__button {
    min-height: 42px;
    padding: 0 12px;
    font-size: 14px;
  }

  .material__telegram-copy p {
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

/* Единый ритм и выравнивание ссылки «Назад». */
.brand { padding-top: 24px; }
.hero__inner { padding-top: 28px; }
.back-link .button-arrow { transform: translateY(-1px); }

@media (max-width: 640px) {
  .brand { padding-top: 20px; }
  .hero__inner { padding-top: 24px; }
  .back-link { transform: none; }
  .back-link .button-arrow { transform: translateY(-2px); }
}