:root {
  --bg: #0b1020;
  --card: #141b34;
  --accent: #f6821f; /* Cloudflare orange */
  --accent-2: #faae40;
  --text: #e8ecf5;
  --muted: #97a0bd;
  --ok: #4ade80;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(246, 130, 31, 0.25), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(250, 174, 64, 0.18), transparent 55%),
    var(--bg);
}

.card {
  width: min(680px, 100%);
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 40px 36px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.45);
  backdrop-filter: blur(6px);
}

.cloud { font-size: 56px; line-height: 1; }

h1 {
  margin: 12px 0 4px;
  font-size: 30px;
  letter-spacing: -0.5px;
}

.subtitle { margin: 0 0 24px; color: var(--muted); }

.panel {
  background: var(--card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 14px;
  padding: 20px;
}

.panel h2 { margin: 0 0 6px; font-size: 17px; }
.hint { margin: 0 0 12px; color: var(--muted); font-size: 14px; }

code {
  background: rgba(246,130,31,0.15);
  color: var(--accent-2);
  padding: 2px 6px;
  border-radius: 6px;
  font-family: "SF Mono", Menlo, Consolas, monospace;
}

.output {
  margin: 0 0 16px;
  padding: 14px 16px;
  background: #0a0f1f;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 10px;
  color: var(--ok);
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 84px;
}

.btn {
  appearance: none;
  border: none;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1a1205;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: 10px;
  transition: transform 0.06s ease, filter 0.2s ease;
}
.btn:hover { filter: brightness(1.05); }
.btn:active { transform: translateY(1px); }

footer {
  margin-top: 22px;
  color: var(--muted);
  font-size: 12.5px;
  text-align: center;
}