:root {
  --bg: #0b0d14;
  --panel: #141826;
  --border: #232a3d;
  --primary: #7c5cff;
  --accent: #22d3ee;
  --success: #34d399;
  --text: #e8eaf2;
  --muted: #9aa3b8;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 760px; margin: 0 auto; padding: 0 20px; }

header.site {
  position: sticky; top: 0; z-index: 10;
  background: rgba(11, 13, 20, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
header.site .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px; gap: 16px; flex-wrap: wrap;
}
.logo {
  font-weight: 700; color: var(--text); letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
nav a { color: var(--muted); margin-left: 18px; font-size: 15px; }
nav a:hover { color: var(--text); text-decoration: none; }

.hero { padding: 48px 0 8px; text-align: center; }
.hero h1 {
  font-size: clamp(28px, 6vw, 44px);
  letter-spacing: -0.03em; line-height: 1.15; margin: 0 0 10px;
}
.hero p { color: var(--muted); margin: 0 auto; max-width: 560px; }
.badge {
  display: inline-block; margin-top: 14px; padding: 4px 12px;
  border: 1px solid var(--border); border-radius: 999px;
  color: var(--muted); font-size: 13px;
}

.panel {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 22px; margin: 24px 0;
}

label.field-label {
  display: block; font-size: 13px; font-weight: 600;
  color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em;
  margin: 18px 0 6px;
}
label.field-label:first-child { margin-top: 0; }

textarea, select {
  width: 100%; padding: 10px 12px;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  font-size: 15px; font-family: inherit;
}
textarea { min-height: 84px; resize: vertical; }
textarea:focus, select:focus { outline: 2px solid var(--primary); outline-offset: 1px; }

.term-tip {
  font-size: 13px; color: var(--muted); margin-top: 6px; min-height: 20px;
}

.presets { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.chip {
  padding: 6px 14px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--border); background: var(--bg);
  color: var(--text); font-size: 14px;
}
.chip:hover { border-color: var(--primary); }
.chip.active {
  border-color: var(--primary);
  background: rgba(124, 92, 255, 0.15);
}

.output-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; flex-wrap: wrap; margin-bottom: 10px;
}
.toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.toggle button {
  background: var(--bg); color: var(--muted); border: none;
  padding: 6px 14px; cursor: pointer; font-size: 14px;
}
.toggle button.active { background: var(--primary); color: #fff; }

#prompt-output {
  background: #0e1119; border: 1px solid var(--border); border-radius: 8px;
  padding: 14px; min-height: 120px; margin: 0;
  font-family: var(--mono); font-size: 13.5px; white-space: pre-wrap;
  word-break: break-word; color: var(--text);
}

.btn-primary {
  display: inline-block; margin-top: 12px;
  background: linear-gradient(90deg, var(--primary), #5b8cff);
  color: #fff; border: none; border-radius: 8px;
  padding: 12px 28px; font-size: 16px; font-weight: 600; cursor: pointer;
}
.btn-primary:hover { filter: brightness(1.1); }
.btn-primary.copied { background: var(--success); color: #06281c; }

.faq details {
  border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 16px; margin-bottom: 10px; background: var(--panel);
}
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { color: var(--muted); margin: 10px 0 0; }

.prose h2 { letter-spacing: -0.02em; margin-top: 36px; }
.prose p, .prose li { color: var(--muted); }
.prose strong, .prose h1, .prose h2 { color: var(--text); }

.example-card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 20px; margin-bottom: 16px;
}
.example-card h3 { margin: 0 0 8px; }
.example-card pre {
  background: #0e1119; border: 1px solid var(--border); border-radius: 8px;
  padding: 12px; font-family: var(--mono); font-size: 13px;
  white-space: pre-wrap; color: var(--text); overflow-x: auto;
}

footer.site {
  border-top: 1px solid var(--border); margin-top: 56px; padding: 28px 0 40px;
  color: var(--muted); font-size: 14px;
}
footer.site .container { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { margin-right: 16px; }
.disclaimer { font-size: 13px; opacity: 0.85; }