:root {
  --bg: #020617;
  --panel: rgba(15, 23, 42, 0.86);
  --border: rgba(148, 163, 184, 0.32);
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --accent2: #a855f7;
  --shadow: 0 28px 90px rgba(15,23,42,0.95);
  --radius: 16px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(900px 520px at 10% 0%, rgba(56, 189, 248, 0.18), transparent 65%),
    radial-gradient(900px 520px at 90% 10%, rgba(168, 85, 247, 0.18), transparent 65%),
    radial-gradient(1400px 900px at 50% 120%, rgba(15, 23, 42, 0.9), #020617);
}

.bg {
  position: fixed;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cpath d='M0 1h120' stroke='rgba(255,255,255,0.03)'/%3E%3Cpath d='M1 0v120' stroke='rgba(255,255,255,0.03)'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.35;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.header {
  padding: 28px 0 18px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  background:
    conic-gradient(from 220deg, rgba(56, 189, 248, 0.9), rgba(168, 85, 247, 0.9), rgba(56, 189, 248, 0.9));
  box-shadow:
    0 0 0 1px rgba(15, 23, 42, 1),
    0 0 40px rgba(56, 189, 248, 0.45);
}

.title {
  font-weight: 760;
  letter-spacing: -0.02em;
  font-size: 18px;
}
.subtitle {
  color: var(--muted);
  font-size: 13px;
  margin-top: 2px;
}

.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
}
.nav a:hover {
  color: var(--text);
  border-color: var(--border);
  background: rgba(255,255,255,0.03);
}

.grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 18px;
  padding: 10px 0 28px 0;
}
@media (max-width: 980px) {
  .grid { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  backdrop-filter: blur(20px);
}
.panel h2 {
  margin: 0 0 8px 0;
  font-size: 16px;
  letter-spacing: -0.02em;
}
.muted { color: var(--muted); }
.tiny { font-size: 12px; }

.form { margin-top: 12px; display: grid; gap: 12px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 520px) { .row { grid-template-columns: 1fr; } }

.field { display: grid; gap: 6px; }
.field > span { font-size: 12px; color: var(--muted); }
.help { font-size: 12px; }
input, select, textarea {
  width: 100%;
  color: var(--text);
  background: rgba(0,0,0,0.22);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 12px;
  padding: 10px 12px;
  outline: none;
}
textarea { resize: vertical; font-family: var(--mono); font-size: 12px; line-height: 1.5; }
input:focus, select:focus, textarea:focus {
  border-color: rgba(76, 201, 240, 0.55);
  box-shadow: 0 0 0 3px rgba(76, 201, 240, 0.16);
}

.btn {
  cursor: pointer;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.12);
  padding: 10px 12px;
  background: linear-gradient(180deg, rgba(76, 201, 240, 0.18), rgba(76, 201, 240, 0.08));
  color: var(--text);
  font-weight: 650;
}
.btn:hover { border-color: rgba(76, 201, 240, 0.45); }
.btn:active { transform: translateY(1px); }
.btn-secondary {
  background: linear-gradient(180deg, rgba(124, 58, 237, 0.16), rgba(124, 58, 237, 0.08));
}
.btn-secondary:hover { border-color: rgba(124, 58, 237, 0.45); }

.previewHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.chip {
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(0,0,0,0.18);
}
.preview {
  border-radius: 12px;
  border: 1px dashed rgba(255,255,255,0.14);
  padding: 14px;
  display: grid;
  place-items: center;
  background: rgba(0,0,0,0.12);
  overflow: hidden;
}
.preview img {
  max-width: 100%;
  height: auto;
  display: block;
}

.examples { margin-top: 14px; }
.examples h3 { margin: 14px 0 8px 0; font-size: 14px; }
.code {
  margin: 10px 0 0 0;
  padding: 12px;
  border-radius: 12px;
  background: rgba(0,0,0,0.25);
  border: 1px solid rgba(255,255,255,0.10);
  overflow: auto;
}
.code code { font-family: var(--mono); font-size: 12px; line-height: 1.5; color: #dbe7ff; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(0,0,0,0.65);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text);
  font-size: 13px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease;
  max-width: min(560px, calc(100% - 40px));
  text-align: center;
}
.toast.show { opacity: 1; }

.footer {
  padding: 14px 0 30px 0;
}