* { box-sizing: border-box; }
:root {
  --bg: #0b1020;
  --card: rgba(20, 28, 52, 0.82);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #f5f7ff;
  --muted: #a8b3cf;
  --accent: #6ea8fe;
  --accent-2: #8b5cf6;
  --input: rgba(255, 255, 255, 0.05);
  --shadow: 0 30px 90px rgba(0, 0, 0, 0.35);
}
html, body {
  margin: 0; min-height: 100%;
  font-family: "Inter", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(110, 168, 254, 0.16), transparent 28%),
    radial-gradient(circle at bottom right, rgba(139, 92, 246, 0.16), transparent 30%),
    linear-gradient(135deg, #07101f 0%, #0d1327 45%, #12152c 100%);
}
body { position: relative; overflow-x: hidden; }
.bg-orb { position: fixed; width: 420px; height: 420px; filter: blur(80px); opacity: 0.28; pointer-events: none; }
.orb-1 { top: -120px; left: -120px; background: #4f8cff; }
.orb-2 { bottom: -140px; right: -100px; background: #8b5cf6; }
.shell { min-height: 100vh; display: grid; place-items: center; padding: 32px 20px; }
.hero-card {
  width: min(980px, 100%);
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 28px;
  padding: 32px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}
.eyebrow {
  display: inline-block; padding: 8px 12px; border-radius: 999px;
  background: rgba(110, 168, 254, 0.14); color: #cfe0ff;
  font-size: 12px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 14px;
}
h1 { margin: 0 0 10px; font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.05; letter-spacing: -0.04em; }
.subtitle { margin: 0 0 28px; color: var(--muted); max-width: 760px; line-height: 1.7; font-size: 1rem; }
.prep-form { display: grid; gap: 20px; }
.grid { display: grid; gap: 16px; }
.two-col { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.field { display: grid; gap: 8px; }
.field span, legend { font-size: 14px; font-weight: 700; color: #dce4ff; }
input[type="text"], input[type="number"], input[type="file"], select {
  width: 100%; border: 1px solid rgba(255, 255, 255, 0.08); background: var(--input);
  color: var(--text); border-radius: 14px; padding: 14px 16px; font: inherit; outline: none; transition: 160ms ease;
}
input:focus, select:focus { border-color: rgba(110, 168, 254, 0.72); box-shadow: 0 0 0 4px rgba(110, 168, 254, 0.16); }
select option { background: #0b1020; color: #f5f7ff; }
.custom-panel { display: none; border: 1px solid rgba(255,255,255,0.08); background: rgba(255,255,255,0.03); border-radius: 18px; padding: 18px; }
.checkbox-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 10px; }
.checkbox-grid label { display: flex; align-items: center; gap: 10px; color: #d7dff7; font-size: 14px; }
.hint { margin: 12px 0 0; color: var(--muted); font-size: 13px; }
.info-row { display: flex; flex-wrap: wrap; gap: 10px; }
.info-chip { border-radius: 999px; padding: 10px 12px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06); color: #d4dcf8; font-size: 13px; }
.primary-btn {
  appearance: none; border: 0; border-radius: 16px; padding: 16px 20px; font: inherit;
  font-weight: 800; color: white; cursor: pointer;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  box-shadow: 0 18px 40px rgba(82, 105, 255, 0.35); transition: transform 140ms ease, filter 140ms ease;
}
.primary-btn:hover { transform: translateY(-1px); filter: brightness(1.06); }
.alerts { display: grid; gap: 10px; margin-bottom: 18px; }
.alert { padding: 14px 16px; border-radius: 14px; font-size: 14px; font-weight: 600; }
.alert.error { background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.25); color: #fecaca; }
.reset-btn {
  appearance: none; border: 1px solid rgba(255,255,255,0.15); border-radius: 8px; padding: 6px 12px; font: inherit;
  font-size: 13px; font-weight: 600; color: #dce4ff; cursor: pointer; background: rgba(255,255,255,0.05); transition: 140ms ease;
}
.reset-btn:hover { background: rgba(255,255,255,0.1); }
@media (max-width: 760px) {
  .two-col, .checkbox-grid { grid-template-columns: 1fr; }
  .hero-card { padding: 22px; border-radius: 22px; }
}