:root {
  color-scheme: dark;
  --bg: #070d15;
  --panel: rgba(13, 18, 29, 0.88);
  --panel-border: rgba(138, 204, 255, 0.18);
  --text: #eff7ff;
  --muted: #99afc8;
  --accent: #86ffc7;
  --accent-2: #ffb067;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", sans-serif;
  color: var(--text);
  position: relative;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 12% 18%, rgba(134, 255, 199, 0.12), transparent 25%),
    radial-gradient(circle at 80% 14%, rgba(255, 176, 103, 0.12), transparent 22%),
    linear-gradient(180deg, #0b1119 0%, var(--bg) 100%);
}

body::before,
body::after {
  content: "";
  position: fixed;
  pointer-events: none;
  z-index: 0;
}

body::before {
  top: -8rem;
  right: -7rem;
  width: 30rem;
  height: 30rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(134, 255, 199, 0.24), rgba(140, 174, 255, 0.08) 50%, transparent 72%);
  filter: blur(18px);
  animation: floatAura 22s ease-in-out infinite alternate;
}

body::after {
  inset: 0;
  background:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.75), transparent 82%);
}

.shell {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid rgba(138, 204, 255, 0.14);
}

.nav-link.current {
  background: linear-gradient(135deg, var(--accent), #8caeff);
  color: #04101a;
  font-weight: 700;
}

.hero { margin-bottom: 24px; }
.eyebrow { margin: 0 0 10px; text-transform: uppercase; letter-spacing: 0.22em; font-size: 0.72rem; color: var(--accent); }
h1, h2 { margin: 0; font-family: "Rajdhani", sans-serif; }
h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); line-height: 0.95; }
.lede { max-width: 760px; color: var(--muted); }
.page-note { margin: 10px 0 0; color: var(--muted); }
.page-note strong { color: var(--text); }
.layout { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.85fr); gap: 20px; }
.panel { background: var(--panel); border: 1px solid var(--panel-border); border-radius: 24px; box-shadow: var(--shadow); backdrop-filter: blur(10px); }
.form-panel { padding: 22px; }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.field { display: grid; gap: 8px; }
.field-wide { grid-column: 1 / -1; }
.field span, .status { color: var(--muted); }
.inline-tip { grid-column: 1 / -1; margin: -2px 2px 0; color: var(--accent-2); font-size: 0.92rem; }
.inline-tip strong { color: var(--text); }
input, select, textarea, button { font: inherit; }
input, select, textarea {
  width: 100%;
  border: 1px solid rgba(160, 198, 227, 0.18);
  border-radius: 16px;
  background: rgba(5, 12, 22, 0.75);
  color: var(--text);
  padding: 12px 14px;
}
textarea { resize: vertical; min-height: 110px; }
.toggle-row, .action-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.toggle { display: inline-flex; align-items: center; gap: 8px; border: 1px solid rgba(160, 198, 227, 0.16); border-radius: 999px; padding: 9px 12px; background: rgba(5, 12, 22, 0.6); }
button { border: 0; border-radius: 999px; padding: 13px 18px; font-weight: 700; cursor: pointer; }
#bonelab-generate { background: linear-gradient(135deg, var(--accent), #7ca7ff); color: #04101a; }
#bonelab-download { background: linear-gradient(135deg, var(--accent-2), #ff7d73); color: #1d0a00; }
button:disabled { opacity: 0.55; cursor: not-allowed; }
.side-panel { padding: 20px; display: grid; gap: 18px; align-content: start; }
.cover-wrap { display: flex; justify-content: center; padding: 8px; border-radius: 18px; background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02)); }
#bonelab-cover { width: min(100%, 256px); height: auto; border-radius: 22px; box-shadow: 0 12px 24px rgba(0,0,0,0.35); }
.summary-block, .summary-list, .download-list { display: grid; gap: 10px; }
.summary-line { display: flex; justify-content: space-between; gap: 16px; padding: 10px 12px; border-radius: 14px; background: rgba(255,255,255,0.04); color: var(--muted); }
.summary-line strong { color: var(--text); }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .shell { width: min(100% - 20px, 1180px); padding-top: 22px; } .field-grid { grid-template-columns: 1fr; } }

@keyframes floatAura {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-2rem, 1rem, 0) scale(1.06); }
  100% { transform: translate3d(1rem, 2rem, 0) scale(0.96); }
}