:root{--bg:#070A13;--panel:#101527;--panel2:#151b31;--blue:#3B82F6;--violet:#8B5CF6;--cyan:#22D3EE;--text:#F8FAFC;--muted:#94A3B8;--ok:#22C55E;--err:#EF4444;--warn:#F59E0B;--line:rgba(148,163,184,.22)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;background:radial-gradient(circle at top left,rgba(34,211,238,.16),transparent 32rem),linear-gradient(180deg,#070A13,#0b1020 70%,#070A13);color:var(--text);min-height:100vh}a{color:var(--cyan);text-decoration:none}a:hover{text-decoration:underline}.topbar{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;padding:16px clamp(16px,5vw,56px);background:rgba(7,10,19,.78);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:800;letter-spacing:.08em}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:8px;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 0 28px rgba(34,211,238,.34)}nav{display:flex;gap:16px;align-items:center}nav a{color:var(--muted);font-weight:700}.nav-cta{color:var(--text);padding:9px 14px;border:1px solid var(--line);border-radius:8px}.hero{min-height:calc(100vh - 74px);display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:40px;padding:clamp(36px,7vw,84px);overflow:hidden}.hero h1{font-size:clamp(58px,10vw,128px);line-height:.9;margin:10px 0 18px;letter-spacing:0}.lead{font-size:clamp(22px,3vw,36px);color:var(--text);max-width:820px}.hero p{color:var(--muted);font-size:18px;max-width:680px}.eyebrow{color:var(--cyan);font-weight:800;text-transform:uppercase;font-size:12px;letter-spacing:.16em}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn,button.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:8px;border:1px solid var(--line);background:var(--panel2);color:var(--text);font-weight:800;cursor:pointer}.btn.primary{border:0;background:linear-gradient(135deg,var(--blue),var(--violet));box-shadow:0 12px 34px rgba(59,130,246,.25)}.btn.ghost{background:transparent}.btn:disabled,button:disabled{opacity:.5;cursor:not-allowed}.btn:focus,input:focus{outline:3px solid rgba(34,211,238,.35);outline-offset:2px}.hero-orbit{position:relative;min-height:420px}.hero-orbit span{position:absolute;border:1px solid rgba(34,211,238,.4);border-radius:50%;inset:10%;box-shadow:inset 0 0 40px rgba(139,92,246,.2),0 0 50px rgba(34,211,238,.18);animation:spin 16s linear infinite}.hero-orbit span:nth-child(2){inset:22%;animation-duration:11s;border-color:rgba(139,92,246,.45)}.hero-orbit span:nth-child(3){inset:36%;background:radial-gradient(circle,var(--cyan),var(--blue));border:0}.section-grid,.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;padding:24px clamp(16px,5vw,56px)}.section-grid article,.stats-grid article,.panel-card,.level-card,.result-card,.auth-card,.xp-card{background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.025));border:1px solid var(--line);border-radius:8px;padding:22px;box-shadow:0 20px 60px rgba(0,0,0,.18)}.section-grid h2{margin-top:0}.section-grid p,.footer,.notice,.legal p{color:var(--muted)}.notice,.legal{max-width:980px;margin:32px auto;padding:22px;border:1px solid var(--line);border-radius:8px;background:rgba(16,21,39,.75)}.footer{padding:36px clamp(16px,5vw,56px);border-top:1px solid var(--line);text-align:center}label{display:grid;gap:7px;color:var(--muted);font-weight:700}input{width:100%;min-height:44px;border:1px solid var(--line);border-radius:8px;background:#090d19;color:var(--text);padding:0 12px}input:disabled{opacity:.72}.grid-2,.profile-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.alerta{padding:12px 14px;border-radius:8px;border:1px solid var(--line);margin:12px 0}.alerta-error{border-color:rgba(239,68,68,.5);background:rgba(239,68,68,.12)}.alerta-exito{border-color:rgba(34,197,94,.5);background:rgba(34,197,94,.12)}.alerta-info{border-color:rgba(34,211,238,.5);background:rgba(34,211,238,.1)}.legal{line-height:1.75}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}@media (max-width:860px){.hero{grid-template-columns:1fr;min-height:auto}.hero-orbit{min-height:240px}.section-grid,.stats-grid{grid-template-columns:1fr 1fr}.grid-2,.profile-grid{grid-template-columns:1fr}.topbar{align-items:flex-start;gap:14px;flex-direction:column}nav{flex-wrap:wrap}}@media (max-width:560px){.section-grid,.stats-grid{grid-template-columns:1fr}.hero{padding:28px 16px}.hero h1{font-size:54px}.btn{width:100%}}
.nav-toggle{display:none;min-width:44px;min-height:44px;border:1px solid var(--line);border-radius:8px;background:rgba(255,255,255,.04);color:var(--text);font-size:22px}.nav-pill{display:inline-flex;align-items:center;min-height:34px;padding:0 9px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:12px;font-weight:800}.nav-logout button{min-height:36px;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--text);font-weight:800}.nav-overlay{display:none}.nav-open{overflow:hidden}@media (max-width:900px){.topbar{flex-direction:row;align-items:center}.nav-toggle{display:inline-grid;place-items:center}nav[data-nav-panel]{position:fixed;inset:0 0 0 auto;z-index:40;width:min(86vw,360px);display:flex;flex-direction:column;align-items:stretch;gap:8px;padding:22px;background:#0b1020;border-left:1px solid var(--line);transform:translateX(100%);transition:transform .22s ease;overflow:auto}nav[data-nav-panel] a,nav[data-nav-panel] .nav-pill,nav[data-nav-panel] button{min-height:44px;justify-content:flex-start;width:100%}.nav-open nav[data-nav-panel]{transform:translateX(0)}.nav-overlay{position:fixed;inset:0;z-index:35;background:rgba(0,0,0,.52);backdrop-filter:blur(3px)}.nav-open .nav-overlay{display:block}}@media (max-width:360px){body{min-width:0}.hero h1{font-size:44px}.topbar{padding:12px}.brand{font-size:14px}.brand-mark{width:32px;height:32px}}
.tutorial-overlay{position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:18px;background:rgba(17,24,39,.58)}.tutorial-box{width:min(460px,100%);border-radius:8px;background:#fff;color:#111827;padding:24px;box-shadow:0 24px 70px rgba(17,24,39,.24)}.tutorial-box p{color:#4b5563}.tutorial-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:18px;flex-wrap:wrap}

body{position:relative}.topbar{z-index:100}.nav-actions{position:relative;z-index:200}.nav-actions a,.nav-actions button,.hero-actions a{position:relative;z-index:201;pointer-events:auto}.hero{position:relative;z-index:1}.hero-copy{position:relative;z-index:10}.hero-actions{position:relative;z-index:20}.hero-orbit,.hero-orbit span,.hero::before,.hero::after{z-index:0;pointer-events:none}.nav-overlay{pointer-events:none}.nav-open .nav-overlay{pointer-events:auto}

.site-footer{margin-top:auto;padding:1.25rem clamp(16px,5vw,56px);background:rgba(7,10,19,.9)}.site-footer__content{display:flex;justify-content:space-between;align-items:center;gap:1rem;max-width:1200px;margin:0 auto 10px;color:var(--muted);font-size:.85rem}.site-version{white-space:nowrap;font-weight:800;color:var(--cyan)}@media (max-width:600px){.site-footer__content{flex-direction:column;text-align:center}.site-version{white-space:normal}}