/* ───────── Busalab · sistema de diseño ───────── */
:root{
  --bg:#0b1120;
  --bg-soft:#0f172a;
  --surface:#ffffff;
  --surface-2:#f8fafc;
  --border:#e2e8f0;
  --text:#0f172a;
  --muted:#64748b;
  --brand:#6366f1;
  --brand-2:#8b5cf6;
  --brand-ink:#4338ca;
  --accent:#10b981;
  --danger:#ef4444;
  --warn:#f59e0b;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 30px -12px rgba(15,23,42,.25);
  --shadow-lg:0 30px 60px -20px rgba(15,23,42,.35);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--text);
  background:var(--surface-2);line-height:1.55;-webkit-font-smoothing:antialiased;
}
a{color:var(--brand-ink);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1120px;margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}
img{max-width:100%}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  padding:12px 20px;border-radius:12px;font-weight:600;font-size:15px;
  border:1px solid transparent;cursor:pointer;transition:.15s;text-decoration:none;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:var(--shadow)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--border)}
.btn-ghost:hover{background:var(--surface)}
.btn-light{background:#fff;color:var(--brand-ink);border-color:var(--border)}
.btn-danger{background:#fff;color:var(--danger);border-color:#fecaca}
.btn-danger:hover{background:#fef2f2}
.btn-sm{padding:8px 14px;font-size:13px;border-radius:10px}
.btn-block{width:100%}

/* Nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--text)}
.brand:hover{text-decoration:none}
.brand .logo{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:grid;place-items:center;color:#fff;font-weight:800}
.nav-links{display:flex;align-items:center;gap:18px}
.nav-links a{color:var(--muted);font-weight:600;font-size:15px}
.nav-links a.btn-primary,.nav-links a.btn-primary:hover{color:#fff !important}
.nav-links a.btn-light,.nav-links a.btn-light:hover{color:var(--brand-ink) !important}
.nav-links a.btn:hover{text-decoration:none}

/* Hero */
.hero{position:relative;background:radial-gradient(1200px 500px at 70% -10%,rgba(139,92,246,.22),transparent),var(--bg);color:#e2e8f0;padding:90px 0 80px;overflow:hidden}
.hero h1{font-size:clamp(34px,5vw,58px);line-height:1.05;margin:0 0 20px;color:#fff;letter-spacing:-1px}
.hero h1 .grad{background:linear-gradient(120deg,#a78bfa,#818cf8,#34d399);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:clamp(17px,2.2vw,21px);color:#cbd5e1;max-width:680px;margin:0 0 32px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.pill{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);color:#e2e8f0;padding:7px 14px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:24px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(16,185,129,.25)}

.stats{display:flex;gap:40px;margin-top:48px;flex-wrap:wrap}
.stat .n{font-size:30px;font-weight:800;color:#fff}
.stat .l{color:#94a3b8;font-size:14px}

/* Sections */
.section{padding:72px 0}
.section h2{font-size:clamp(26px,3.5vw,38px);letter-spacing:-.5px;margin:0 0 12px;text-align:center}
.section .sub{text-align:center;color:var(--muted);max-width:620px;margin:0 auto 48px;font-size:17px}

/* Wedge comparison */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:880px;margin:0 auto}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.card.them{border-color:#fecaca}
.card.us{border:2px solid var(--brand);box-shadow:var(--shadow-lg)}
.card h3{margin:0 0 16px;font-size:18px;display:flex;align-items:center;gap:8px}
.check-list{list-style:none;padding:0;margin:0}
.check-list li{display:flex;gap:10px;padding:8px 0;font-size:15px;align-items:flex-start}
.check-list .ic{flex:none;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:800;color:#fff;margin-top:1px}
.ic.ok{background:var(--accent)}
.ic.no{background:var(--danger)}

/* Feature grid */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px}
.feature .emoji{font-size:26px}
.feature h4{margin:14px 0 8px;font-size:17px}
.feature p{margin:0;color:var(--muted);font-size:15px}

/* Auth */
.auth-wrap{min-height:calc(100vh - 64px);display:grid;place-items:center;padding:40px 20px;background:radial-gradient(900px 400px at 50% -10%,rgba(99,102,241,.12),transparent)}
.auth-card{width:100%;max-width:420px;background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:36px;box-shadow:var(--shadow-lg)}
.auth-card h1{font-size:24px;margin:0 0 6px}
.auth-card .sub{color:var(--muted);margin:0 0 26px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:#334155}
.input,select,textarea{
  width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:11px;font-size:15px;
  font-family:inherit;background:#fff;color:var(--text);transition:.15s;
}
.input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(99,102,241,.15)}
.alert{background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;padding:11px 14px;border-radius:11px;font-size:14px;margin-bottom:18px}
.center-sm{text-align:center;font-size:14px;color:var(--muted);margin-top:20px}

/* App shell */
.app-bar{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:40}
.app-bar .container{display:flex;align-items:center;justify-content:space-between;height:62px}
.app-main{padding:32px 0 60px}
.page-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.page-head h1{margin:0;font-size:26px}

.kpis{display:flex;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.kpi{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px 22px;min-width:150px}
.kpi .n{font-size:26px;font-weight:800}
.kpi .l{color:var(--muted);font-size:13px}

.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:18px;flex-wrap:wrap}
.chip{padding:7px 14px;border-radius:999px;border:1px solid var(--border);background:#fff;font-size:13px;font-weight:600;color:var(--muted);cursor:pointer}
.chip.active{background:var(--brand);color:#fff;border-color:var(--brand)}

/* QR grid */
.qr-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.qr-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;transition:.15s;display:flex;flex-direction:column}
.qr-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.qr-card .thumb{background:var(--surface-2);border-radius:12px;padding:14px;display:grid;place-items:center;margin-bottom:14px}
.qr-card .thumb img{width:130px;height:130px}
.qr-card h3{margin:0 0 4px;font-size:16px}
.qr-card .meta{color:var(--muted);font-size:13px;margin-bottom:10px;word-break:break-all}
.qr-card .row{display:flex;align-items:center;justify-content:space-between;margin-top:auto}
.badge{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.4px;padding:3px 8px;border-radius:6px;background:#eef2ff;color:var(--brand-ink)}
.scan-badge{font-weight:700}

.empty{text-align:center;padding:70px 20px;background:var(--surface);border:1px dashed var(--border);border-radius:var(--radius)}
.empty .big{font-size:46px}

/* Detail */
.detail-grid{display:grid;grid-template-columns:340px 1fr;gap:28px;align-items:start}
.qr-preview{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;text-align:center;position:sticky;top:90px}
.qr-preview img{width:240px;height:240px;background:#fff;border-radius:12px}
.dl-row{display:flex;gap:8px;justify-content:center;margin-top:18px;flex-wrap:wrap}
.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:20px}
.panel h2{margin:0 0 16px;font-size:18px}
.kv{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--surface-2);font-size:14px}
.kv:last-child{border-bottom:none}
.kv .k{color:var(--muted)}
.bar-row{display:flex;align-items:center;gap:12px;margin-bottom:10px;font-size:14px}
.bar-row .lab{width:120px;flex:none;color:#334155}
.bar-track{flex:1;background:var(--surface-2);border-radius:6px;height:10px;overflow:hidden}
.bar-fill{height:100%;background:linear-gradient(90deg,var(--brand),var(--brand-2));border-radius:6px}
.bar-row .val{width:42px;text-align:right;color:var(--muted)}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.type-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:8px}
.type-opt{border:1px solid var(--border);border-radius:12px;padding:14px 8px;text-align:center;cursor:pointer;font-size:13px;font-weight:600}
.type-opt .e{font-size:22px;display:block;margin-bottom:4px}
.type-opt.active{border-color:var(--brand);background:#eef2ff;color:var(--brand-ink)}

.live-preview{position:sticky;top:90px;text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.live-preview img{width:210px;height:210px;background:#fff;border-radius:12px}

/* Editores dinámicos */
.ed-row{display:flex;gap:8px;align-items:center;margin-bottom:8px}
.ed-row .input{flex:1}
.ed-card{border:1px solid var(--border);border-radius:12px;padding:14px;margin-bottom:12px;background:var(--surface-2)}
.ed-card .ed-sname{font-weight:600;margin-bottom:10px}
.ed-items{margin:6px 0}
.adv-block{padding:14px 0;border-top:1px solid var(--surface-2)}
.adv-block:first-child{border-top:none}
.adv-block h3{font-size:15px;margin:0 0 4px}
.adv-block p.hint{color:var(--muted);font-size:13px;margin:0 0 12px}
.lead-row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--surface-2);font-size:14px}
.fb-msg{background:var(--surface-2);border-radius:10px;padding:12px;margin-bottom:8px;font-size:14px}
.fb-stars{color:#f59e0b;font-weight:700}
.switch{display:flex;align-items:center;gap:10px;font-weight:600;font-size:14px;cursor:pointer}

/* Caja avanzada que se abre */
.adv-card{border:1px solid var(--border);border-radius:14px;background:var(--surface-2);margin-top:18px;overflow:hidden}
.adv-card>summary{padding:15px 18px;font-weight:700;cursor:pointer;list-style:none;display:flex;align-items:center;gap:8px}
.adv-card>summary::-webkit-details-marker{display:none}
.adv-card>summary::after{content:"▸";margin-left:auto;color:var(--muted);transition:.2s}
.adv-card[open]>summary::after{transform:rotate(90deg)}
.adv-card[open]>summary{border-bottom:1px solid var(--border)}
.adv-card .adv-body{padding:6px 18px 16px}
.adv-section{padding:18px 0;border-top:1px solid var(--border)}
.adv-section:first-child{border-top:none}
.adv-section h3{font-size:15px;margin:0 0 4px}

/* Interruptor on/off */
.toggle{display:inline-flex;align-items:center;gap:12px;cursor:pointer;font-weight:600;font-size:14px;user-select:none}
.toggle input{position:absolute;opacity:0;width:0;height:0}
.toggle .track{width:46px;height:26px;border-radius:999px;background:#cbd5e1;position:relative;transition:.2s;flex:none}
.toggle .thumb{position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.3);transition:.2s}
.toggle input:checked + .track{background:linear-gradient(135deg,var(--brand),var(--brand-2))}
.toggle input:checked + .track .thumb{transform:translateX(20px)}
.toggle input:focus-visible + .track{box-shadow:0 0 0 3px rgba(99,102,241,.25)}

/* Modales (sustituyen alert/confirm) */
.bl-overlay{position:fixed;inset:0;background:rgba(15,23,42,.5);backdrop-filter:blur(2px);display:grid;place-items:center;z-index:1000;padding:20px;animation:blfade .15s ease}
.bl-modal{background:var(--surface);border-radius:18px;padding:26px;max-width:420px;width:100%;box-shadow:var(--shadow-lg);animation:blpop .16s ease}
.bl-modal h3{margin:0 0 8px;font-size:19px}
.bl-modal p{margin:0 0 22px;color:var(--muted);font-size:15px;line-height:1.5}
.bl-actions{display:flex;gap:10px;justify-content:flex-end}
@keyframes blfade{from{opacity:0}to{opacity:1}}
@keyframes blpop{from{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:none}}

.footer{padding:40px 0;text-align:center;color:var(--muted);font-size:14px;border-top:1px solid var(--border);background:var(--surface)}

@media(max-width:820px){
  .compare,.features,.detail-grid,.grid-2{grid-template-columns:1fr}
  .type-grid{grid-template-columns:repeat(2,1fr)}
  .qr-preview,.live-preview{position:static}
}