:root {
  --bg: #0b1020;
  --panel: #121a2f;
  --line: #2a375f;
  --text: #eef2ff;
  --muted: #9aa8d0;
  --accent: #5eead4;
  --accent-2: #60a5fa;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 500px at 90% -10%, #1d4ed844, transparent 60%),
    radial-gradient(1000px 500px at -10% 0%, #14b8a644, transparent 55%),
    var(--bg);
}

body {
  padding: 24px;
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 20px;
}

.panel,
.preview {
  background: linear-gradient(180deg, #16203a, #10172b);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}

h1 {
  margin: 0 0 8px;
  font-size: 28px;
}

p {
  margin: 0 0 18px;
  color: var(--muted);
}

.form {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 14px;
}

input,
select,
button {
  border-radius: 10px;
  border: 1px solid #2b3a63;
  background: #0f1730;
  color: var(--text);
  padding: 10px 12px;
  font-size: 15px;
}

button {
  margin-top: 6px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #0b1224;
  border: none;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.06);
}

.links {
  margin-top: 14px;
  display: grid;
  gap: 6px;
}

.links span {
  color: var(--muted);
  font-size: 13px;
}

.links a {
  color: #93c5fd;
  word-break: break-all;
}

.preview {
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview img {
  width: 100%;
  max-width: 100%;
  border-radius: 10px;
  border: 1px solid #2b3a63;
  background: #0b1224;
}

@media (max-width: 900px) {
  .page {
    grid-template-columns: 1fr;
  }
}