:root{color-scheme:dark;--bg: #0b1020;--panel: #141b2f;--border: #2a3555;--text: #e8eefc;--muted: #9aa8c7;--accent: #6ec8ff;--accent-2: #ffc857;--danger: #ff6b7a;--ok: #5ddea0;--btn: #1e2a48;font-family:SF Pro Text,system-ui,-apple-system,sans-serif}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:radial-gradient(ellipse at top,#152044 0%,var(--bg) 55%);color:var(--text)}#app{max-width:1400px;margin:0 auto;padding:12px 16px 32px}.top-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;flex-wrap:wrap}.top h1{margin:0;font-size:1.5rem;letter-spacing:.02em}.handbook-launch{flex-shrink:0;min-height:44px;padding:10px 14px;border-radius:12px;border:1px solid var(--border);background:#1a2744;color:var(--accent);font-weight:600}.handbook-launch-full{width:100%}.hint{margin:8px 0 0;font-size:.8rem;color:var(--muted);line-height:1.35}.propellant-field{border:1px solid var(--border);border-radius:10px;padding:8px 10px;margin:8px 0 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