:root {
  --bg: #0f172a;
  --bg-soft: #1e293b;
  --card: rgba(15, 23, 42, 0.75);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --border: rgba(148, 163, 184, 0.25);
  --shadow: 0 20px 45px rgba(2, 6, 23, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, #1d4ed8 0%, transparent 45%),
    radial-gradient(circle at 90% 80%, #0ea5e9 0%, transparent 40%),
    linear-gradient(160deg, var(--bg) 0%, var(--bg-soft) 100%);
  display: grid;
  place-items: center;
  padding: 24px;
}

.shell {
  width: 100%;
  max-width: 900px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--card);
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.55);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #475569;
}

.dot:nth-child(1) { background: #f43f5e; }
.dot:nth-child(2) { background: #f59e0b; }
.dot:nth-child(3) { background: #22c55e; }

.brand {
  margin-left: 10px;
  font-size: 0.9rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding: 32px 26px;
}

.badge {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(1.7rem, 3.8vw, 2.6rem);
  line-height: 1.2;
}

p {
  margin: 0 0 14px;
  color: var(--muted);
  line-height: 1.65;
  max-width: 62ch;
}

.image-wrap {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: rgba(15, 23, 42, 0.45);
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.welcome-image {
  width: min(100%, 346px);
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  display: block;
}

@media (min-width: 768px) {
  .welcome-image {
    width: min(100%, 420px);
  }
}

.image-placeholder {
  color: var(--muted);
  font-size: 0.95rem;
  text-align: center;
  padding: 24px;
}

.footer {
  margin-top: 8px;
  font-size: 0.82rem;
  color: #64748b;
}