:root {
  --bg: #0f1115;
  --card: #171a21;
  --card-border: rgba(255, 255, 255, 0.10);
  --text: #f4efe8;
  --muted: #a9b0bf;
  --line: rgba(255, 255, 255, 0.10);
  --accent: #f4efe8;
  --accent-soft: rgba(255, 255, 255, 0.08);
  --radius: 28px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Arial, sans-serif;
  line-height: 1.55;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.09), transparent 34rem),
    radial-gradient(circle at bottom right, rgba(255, 255, 255, 0.06), transparent 30rem),
    var(--bg);
}

a {
  color: var(--text);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.system-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 18px;
}

.system-card {
  width: min(100%, 860px);
  padding: clamp(28px, 5vw, 56px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025)),
    var(--card);
  box-shadow: var(--shadow);
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 34px;
}

.brand-logo {
  width: 72px;
  height: 72px;
  flex: 0 0 auto;
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 7vw, 68px);
  line-height: 0.95;
  font-weight: 400;
}

.lead {
  max-width: 680px;
  margin: 0 0 34px;
  color: var(--text);
  font-size: clamp(20px, 3vw, 30px);
  line-height: 1.22;
  letter-spacing: -0.03em;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  margin: 0 0 28px;
}

.info-item {
  min-height: 128px;
  padding: 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.label {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.value {
  display: block;
  color: var(--text);
  font-size: 17px;
  font-weight: 650;
}

.notice {
  margin: 0 0 26px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  color: var(--muted);
  background: var(--accent-soft);
}

.notice strong {
  color: var(--text);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 750;
  text-decoration: none;
  transition: transform 160ms ease, opacity 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  color: #0f1115;
  background: var(--accent);
}

.button.secondary {
  color: var(--text);
  border: 1px solid var(--line);
  background: transparent;
}

.system-footer {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 680px) {
  .system-card {
    border-radius: 22px;
  }

  .brand-row {
    align-items: flex-start;
  }

  .brand-logo {
    width: 56px;
    height: 56px;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }

  .info-item {
    min-height: auto;
  }

  .actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .system-footer {
    flex-direction: column;
  }
}