:root{font-family:Inter,system-ui,-apple-system,sans-serif;color:#111827;background:#eef1f5;--navy:#0f172a;--slate:#1e293b;--orange:#f59e0b;--line:#dbe1e8;--muted:#64748b}*{box-sizing:border-box}body{margin:0;padding-bottom:88px}button,input,select,textarea{font:inherit}.topbar{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:12px 18px;background:var(--navy);color:#fff;box-shadow:0 2px 12px #0003}.brand{display:flex;align-items:center;gap:11px;border:0;background:none;color:#fff;text-align:left}.brand strong{display:block;font-size:1.05rem}.brand small{display:block;color:#94a3b8;font-size:.7rem}.logo{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:var(--orange);color:#111827;font-weight:950}.connection{padding:5px 9px;border:1px solid #475569;border-radius:999px;color:#cbd5e1;font-size:.72rem}.shell{width:min(980px,92vw);margin:auto;padding:22px 0}.page{display:none}.page.active{display:block}.hero.compact{padding:8px 0 20px}.eyebrow{margin:0 0 5px;color:#b45309;font-weight:900;letter-spacing:.12em;font-size:.72rem}h1{margin:.1em 0;font-size:clamp(2rem,8vw,3.7rem);line-height:1.02}h2{margin:0 0 12px}.hero p:last-child{max-width:680px;color:#526071;font-size:1.05rem}.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:18px}.category-tile{min-height:130px;padding:16px;border:1px solid var(--line);border-radius:18px;background:#fff;text-align:left;box-shadow:0 7px 22px #0f172a0c}.category-tile span{display:block;font-size:2rem}.category-tile strong{display:block;margin-top:10px;font-size:1rem}.category-tile small{color:var(--muted)}.card{margin-bottom:16px;padding:20px;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:0 8px 24px #0f172a0a}.sectionhead{display:flex;justify-content:space-between;align-items:center;gap:12px}.action-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.action-grid button{padding:15px 10px;border:1px solid var(--line);border-radius:14px;background:#f8fafc;font-weight:800}.action-grid span{display:block;font-size:1.45rem;margin-bottom:5px}.page-title{display:flex;align-items:center;gap:12px;margin:2px 0 18px}.page-title h1{font-size:2.2rem}.back{width:42px;height:42px;border:1px solid var(--line);border-radius:13px;background:#fff;font-size:1.4rem}label{display:block;margin:14px 0;font-weight:800}input,select,textarea{width:100%;margin-top:7px;padding:13px 14px;border:1px solid #cbd5e1;border-radius:12px;background:#fff;color:#111827}textarea{min-height:130px;resize:vertical}.primary{padding:13px 17px;border:0;border-radius:12px;background:var(--orange);color:#111827;font-weight:900}.text-button{border:0;background:none;color:#b45309;font-weight:800}.muted{color:var(--muted)}.hidden{display:none}.result{scroll-margin-top:85px}.safety{padding:13px 14px;border-left:5px solid #dc2626;border-radius:9px;background:#fef2f2;font-weight:800}.cause{margin-top:20px;padding-top:18px;border-top:1px solid var(--line)}.confidence,.badge{display:inline-block;padding:4px 9px;border-radius:999px;background:#fef3c7;color:#92400e;font-size:.78rem;font-weight:900}ul,ol{padding-left:22px;line-height:1.55}.history{display:grid;gap:10px}.history-item{padding:13px;border:1px solid var(--line);border-radius:13px;background:#fbfdff}.history-item strong{text-transform:capitalize}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 14px}.wide{grid-column:1/-1}.garage-list{display:grid;gap:11px}.garage-item{display:grid;grid-template-columns:1fr auto;gap:8px;padding:14px;border:1px solid var(--line);border-radius:14px}.garage-item h3{margin:0 0 4px}.garage-meta{color:var(--muted)}.garage-actions button{margin-left:5px;padding:8px 10px;border:0;border-radius:9px;background:#e2e8f0}.inline-form{display:grid;grid-template-columns:1fr auto;gap:10px}.inline-form input{text-transform:uppercase;margin:0;font-size:1.2rem;font-weight:900;letter-spacing:.08em}.obd-card{margin-top:18px;padding:17px;border-radius:15px;background:var(--slate);color:#fff}.obd-card h2{color:#fbbf24}.library-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.library-card span{font-size:2rem}.library-card p,.coming p{color:var(--muted);line-height:1.55}.bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:30;display:grid;grid-template-columns:repeat(5,1fr);padding:7px max(8px,env(safe-area-inset-right)) calc(7px + env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));background:#fff;border-top:1px solid var(--line);box-shadow:0 -5px 18px #0f172a14}.bottom-nav button{padding:6px 2px;border:0;background:none;color:#64748b;font-size:.68rem;font-weight:800}.bottom-nav span{display:block;font-size:1.2rem;margin-bottom:2px}.bottom-nav button.active{color:#b45309}.bottom-nav .diagnose-nav span{display:grid;place-items:center;width:38px;height:38px;margin:-22px auto 2px;border:4px solid #fff;border-radius:50%;background:var(--orange);color:#111827;font-size:1.5rem}@media(max-width:700px){.category-grid{grid-template-columns:repeat(2,1fr)}.category-tile{min-height:118px}.action-grid{grid-template-columns:repeat(2,1fr)}.form-grid,.library-grid{grid-template-columns:1fr}.wide{grid-column:auto}.card{padding:17px}.shell{padding-top:15px}}@media(max-width:380px){.category-grid{gap:8px}.category-tile{padding:13px}.topbar{padding:10px 12px}}