:root {
  --bg: #161616;
  --panel: rgba(34, 34, 34, 0.92);
  --panel-2: rgba(24, 24, 24, 0.96);
  --line: rgba(255,255,255,0.18);
  --text: #f2f2f2;
  --muted: #a9a9a9;
  --green: #00ff4c;
  --red: #ff283a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top center, rgba(0,255,76,0.10), transparent 32rem),
    linear-gradient(180deg, #202020 0%, #101010 100%);
}

a {
  color: var(--green);
  text-decoration: none;
  transition: 0.25s ease;
}

a:hover {
  color: #ffffff;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  padding: 36px 22px 18px;
  text-align: center;
}

.logo {
  max-width: 220px;
  width: 52vw;
  height: auto;
  display: inline-block;
}

.subtitle {
  color: var(--muted);
  font-size: 14px;
  margin-top: 12px;
  line-height: 1.5;
}

.main {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  gap: 16px;
  padding: 18px 0 34px;
}

.hero {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
  box-shadow: 0 18px 70px rgba(0,0,0,0.35);
}

.hero h1 {
  margin: 0 0 10px;
  font-size: clamp(28px, 5vw, 46px);
  letter-spacing: 0.02em;
}

.hero p {
  margin: 0 auto;
  max-width: 720px;
  color: var(--muted);
  line-height: 1.55;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card {
  min-height: 155px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card h2 {
  margin: 0 0 10px;
  font-size: 18px;
}

.card p {
  margin: 0 0 16px;
  color: var(--muted);
  line-height: 1.45;
  font-size: 13px;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 9px 12px;
  font-weight: 700;
  color: var(--text);
  background: rgba(255,255,255,0.04);
}

.button:hover {
  border-color: var(--green);
  color: var(--green);
  background: rgba(0,255,76,0.08);
}

.notice {
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.footer {
  margin-top: auto;
  padding: 18px 20px 28px;
  color: var(--muted);
  text-align: center;
  font-size: 12px;
}

.contact-buttons {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin: 20px 0 12px;
}

.contact-buttons img {
  width: 46px;
  height: 46px;
  object-fit: contain;
}

.file-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.file-link {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
}

.file-link span {
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 780px) {
  .cards {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 20px 16px;
  }
}