:root {
  --bg: #0f172a;
  --panel: rgba(15, 23, 42, 0.95);
  --text: #e2e8f0;
  --accent: #38bdf8;
  --accent-dark: #0ea5e9;
  --border: rgba(148, 163, 184, 0.2);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: Inter, system-ui, sans-serif;
  background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
  color: #0f172a;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.page-container {
  width: min(100%, 560px);
  background: #ffffff;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 32px;
  box-shadow: 0 28px 70px rgba(15, 23, 42, 0.12);
  padding: 48px 32px;
  text-align: center;
}

.hero {
  display: grid;
  gap: 28px;
  align-items: center;
  justify-items: center;
}

.logo {
  width: 220px;
  max-width: 100%;
}

h1 {
  font-size: clamp(3rem, 7vw, 4.2rem);
  margin: 0;
  letter-spacing: -0.04em;
  line-height: 1;
}

.developer-footer {
  margin-top: 42px;
  display: grid;
  gap: 18px;
  justify-items: center;
  color: #64748b;
  font-size: 0.95rem;
}

.partner-logo {
  width: 160px;
  max-width: 100%;
}

@media (max-width: 520px) {
  .page-container {
    width: min(100%, 100%);
    padding: 36px 20px;
    border-radius: 26px;
  }

  .logo {
    width: 180px;
  }

  h1 {
    font-size: 3rem;
  }

  .partner-logo {
    width: 140px;
  }
}

.info-card h2 {
  font-size: 1.5rem;
  margin-bottom: 18px;
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 18px;
  padding: 14px 22px;
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 30px rgba(56, 189, 248, 0.25);
}

button:focus-visible {
  outline: 2px solid #94a3b8;
  outline-offset: 4px;
}

.message {
  margin-top: 18px;
  min-height: 1.4rem;
  font-weight: 600;
}