:root{--bg:#f7f8f5;--paper:#fff;--ink:#18343b;--muted:#5b6b70;--teal:#006c65;--teal2:#0a8171;--border:#dce7e2;--gold:#edb552;--soft:#e9f4ef;--shadow:0 12px 36px rgba(28,54,46,.055)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,'Segoe UI',sans-serif}button,input,select{font:inherit}button{cursor:pointer}a{color:var(--teal);text-underline-offset:3px}a:hover{color:#034f48}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #e7ac43;outline-offset:3px}button:disabled{opacity:.45;cursor:not-allowed}p{margin:0 0 1em}h1,h2,h3{line-height:1.22}h1,h2{font-family:Georgia,'Times New Roman',serif;letter-spacing:-.028em}h1{font-weight:500;font-size:clamp(2.25rem,4.3vw,3.75rem);margin:.4em 0 .3em}h2{font-weight:500;font-size:clamp(1.65rem,3vw,2.2rem);margin:0 0 15px}h3{font-size:1.08rem;margin:0 0 9px}.wrap{max-width:1100px;width:calc(100% - 38px);margin:auto}.skip{position:absolute;top:-100px;left:15px;background:white;padding:10px;z-index:100}.skip:focus{top:12px}.topbar{background:rgba(255,255,255,.93);border-bottom:1px solid var(--border);position:relative;z-index:2}.topnav{display:flex;align-items:center;justify-content:space-between;gap:15px;min-height:75px}.brand{font-size:1.1rem;font-weight:800;text-decoration:none;color:var(--ink);display:flex;gap:11px;align-items:center}.brand-mark{height:37px;width:37px;border-radius:12px;background:var(--teal);color:white;display:grid;place-items:center;font-weight:900}.topnav nav{display:flex;align-items:center;gap:clamp(9px,2vw,26px);flex-wrap:wrap}.topnav nav a{font-size:.9rem;color:#3b5658;text-decoration:none;font-weight:650}.topnav nav a[aria-current]{color:var(--teal)}.eyebrow,.pill{display:inline-flex;align-items:center;gap:7px;padding:6px 12px;border:1px solid #c8e2d8;color:#12685b;border-radius:99px;font-size:.73rem;letter-spacing:.06em;font-weight:800;text-transform:uppercase;background:#edf8f3}.hero{display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:45px;padding:76px 0 60px}.hero p,.lede{color:var(--muted);font-size:1.04rem;max-width:640px}.hero-visual{padding:25px;border-radius:26px;background:linear-gradient(140deg,#e0eee6,#f2ede0);min-height:345px;display:flex;flex-direction:column;justify-content:center}.visual-note{font-size:.73rem;color:#5d756f;display:flex;justify-content:space-between;letter-spacing:.07em;font-weight:750;margin-bottom:14px}.flash{background:#fff;border:1px solid #e2e8e2;box-shadow:0 15px 30px rgba(15,64,49,.055);border-radius:19px;padding:26px}.flash h2{font-family:Georgia,serif;font-size:1.63rem;margin:9px 0 19px}.flash-label{font-size:.68rem;font-weight:800;color:var(--teal);letter-spacing:.1em}.flash-row{border:1px solid var(--border);border-radius:10px;padding:8px 12px;margin:7px 0;font-size:.86rem}.flash-row.correct{background:var(--soft);border-color:#b5d9c6;color:#066c4f;font-weight:700}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.btn{border:1px solid transparent;padding:14px 20px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;font-weight:750;line-height:1.35;text-decoration:none;min-height:48px;font-size:.94rem;transition:transform .12s,background .12s}.btn:hover{transform:translateY(-1px)}.btn-primary{background:#073e42;color:white}.btn-primary:hover{color:white;background:#07565b}.btn-secondary{border-color:#cbdad4;background:white;color:#245452}.small-note{font-size:.81rem!important;color:#697b79!important;margin-top:14px}.section{padding:34px 0 30px}.section-lede{color:var(--muted);max-width:760px}.tiles,.feature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.tile,.feature{background:white;border:1px solid var(--border);border-radius:19px;padding:25px;box-shadow:var(--shadow)}.tile.featured{background:#f0f8f3}.tile-label{font-size:.71rem;text-transform:uppercase;letter-spacing:.1em;color:var(--teal);font-weight:800}.tile h3{margin:14px 0 10px;font-size:1.25rem}.tile p,.feature p,.seo-copy p{color:var(--muted)}.tile-meta{font-size:.8rem;color:#446a63;margin:14px 0}.tile a{font-weight:750}.feature h3{color:var(--ink)}.ad-zone{text-align:center;min-height:100px;margin:65px auto 53px;max-width:900px;clear:both}.ad-label{display:block;color:#9a9f9a;letter-spacing:.18em;font-size:.7rem;font-weight:750;margin-bottom:15px}.ad-zone .adsbygoogle{display:block;min-height:90px}.seo-copy{max-width:900px;margin:35px auto 60px;border-top:1px solid var(--border);padding-top:35px}.seo-copy h3{margin:26px 0 10px}.faq details{background:white;border:1px solid var(--border);border-radius:11px;margin:9px 0;padding:15px 18px}.faq summary{font-weight:700;cursor:pointer}.faq p{padding-top:12px;color:var(--muted)}.foot{border-top:1px solid var(--border);background:white;margin-top:58px}.foot .wrap{padding:24px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:.81rem}.foot a{color:var(--teal)}.breadcrumbs{display:flex;gap:8px;flex-wrap:wrap;font-size:.82rem;padding-top:30px;color:var(--muted)}.breadcrumbs a{color:var(--muted)}.exam-intro{max-width:870px;padding:20px 0 25px}.exam-intro h1{max-width:900px}.exam-intro p{max-width:860px;color:var(--muted)}.metrics{display:flex;gap:9px;flex-wrap:wrap;margin:19px 0 7px}.metric{border:1px solid #cfe0d5;border-radius:8px;background:#edf7f0;padding:7px 11px;font-size:.85rem;font-weight:750;color:#245c52}.app-shell{max-width:970px;margin:20px auto 35px}.panel{background:white;border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow);padding:clamp(18px,3vw,34px)}[hidden]{display:none!important}.panel-title{font-family:Georgia,serif;font-size:1.55rem;margin:0 0 7px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.field label,.field-legend{font-size:.87rem;font-weight:800;display:block;margin:0 0 7px;color:#314b4b}select{width:100%;border:1px solid #c9d8d1;border-radius:11px;background:white;color:var(--ink);height:48px;padding:10px 14px}.seg-row{display:flex;flex-wrap:wrap;gap:10px;margin:8px 0 17px}.seg-row label{display:inline-flex;align-items:center;gap:8px;padding:11px 14px;background:#f6faf7;border:1px solid var(--border);border-radius:10px;cursor:pointer;font-size:.9rem}.seg-row input{accent-color:var(--teal);width:17px;height:17px}.tip{background:#f1f8f4;border-left:3px solid #5fafa2;padding:13px 16px;border-radius:8px;color:#47625b;font-size:.88rem;margin:18px 0}.action-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:18px}.action-row button{border:none}.btn-outline{border:1px solid #cddbd5!important;color:#244c4b!important;background:white!important}.btn-danger{background:#fff5f2!important;border:1px solid #e7c9c1!important;color:#923e2e!important}.exam-header{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;align-items:center}.timer{font-weight:850;color:#1e5859;font-variant-numeric:tabular-nums;background:#e8f5f0;border:1px solid #cce5d7;border-radius:10px;padding:8px 13px}.timer.urgent{background:#fff0e6;color:#a04120;border-color:#e9c6b4}.progress-track{height:9px;border-radius:999px;background:#e8efeb;overflow:hidden;margin:18px 0 10px}.progress-fill{height:100%;width:0;background:linear-gradient(90deg,#008f7c,#66b794);transition:width .2s}.progress-labels{display:flex;justify-content:space-between;gap:9px;font-size:.78rem;color:var(--muted)}.quiz-question{font-family:Georgia,serif;font-size:clamp(1.27rem,2.5vw,1.65rem);line-height:1.55;white-space:pre-line;margin:25px 0 17px;color:#1b373c}.subject-pill{font-size:.73rem;text-transform:uppercase;letter-spacing:.09em;color:var(--teal);font-weight:850;margin:13px 0}.choices{display:grid;gap:10px}.choice{width:100%;display:flex;align-items:flex-start;gap:14px;min-height:60px;text-align:left;border:1px solid #d9e3de;background:#fff;color:#243e41;padding:14px 15px;border-radius:12px;font-weight:500;line-height:1.5;transition:background .12s,border .12s}.choice:hover:not(:disabled){border-color:#75aea1;background:#f3faf6}.choice .letter{flex:0 0 30px;width:30px;height:30px;display:grid;place-items:center;background:#edf4ef;border-radius:8px;color:#315954;font-weight:800}.choice.selected{border:2px solid var(--teal);background:#eaf6f0;padding:13px 14px}.choice.correct{border-color:#0e9367!important;background:#e2f5e8!important}.choice.incorrect{border-color:#c25b52!important;background:#fff0ef!important}.choice:disabled{opacity:1;cursor:default}.feedback{display:grid;gap:6px;background:#ebf8f0;border:1px solid #b9dfc9;border-radius:12px;padding:18px;margin:17px 0;color:#1e6548;font-size:.94rem}.feedback.warn{background:#fff9f0;border-color:#f1d5ac;color:#735027}.palette{display:flex;flex-wrap:wrap;gap:5px;margin-top:22px;padding-top:15px;border-top:1px solid var(--border)}.palette button{border:1px solid #d7e3db;background:#fff;border-radius:7px;height:36px;min-width:36px;padding:2px;font-size:.77rem;color:#315250;font-weight:700}.palette button.answered{background:#d5efe1;border-color:#8bcbb0}.palette button.flagged{border-color:#e6a645;box-shadow:inset 0 -3px #e6a645}.palette button.current{outline:2px solid var(--teal);outline-offset:1px}.palette-help{font-size:.74rem;color:var(--muted);margin-top:7px}.quiz-nav{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:24px}.score-value{font-size:clamp(2.7rem,5vw,4rem);font-weight:850;color:var(--teal);font-variant-numeric:tabular-nums;line-height:1.1}.result-grid{display:flex;gap:8px;flex-wrap:wrap;margin:15px 0}.result-chip{background:#ebf5ee;border:1px solid #d6e6d9;border-radius:99px;padding:7px 11px;color:#2a6653;font-size:.84rem;font-weight:750}.review-list{display:grid;gap:13px;margin-top:16px}.review-item{border:1px solid var(--border);border-radius:12px;padding:17px;background:#fff}.review-item h3{font-size:.97rem;line-height:1.5;margin-bottom:10px;white-space:pre-line}.review-item p{margin:.25em 0;font-size:.88rem;color:var(--muted)}.review-item .result-state{font-weight:800;color:#0b7e52}.review-item .result-state.bad{color:#af5042}.history-list{display:grid;gap:6px;margin-top:12px}.history-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:9px 12px;border:1px solid var(--border);border-radius:9px;font-size:.86rem}.status-msg{font-size:.9rem;color:#567368;margin:13px 0}.sources{margin-top:32px;padding:22px;border:1px solid var(--border);border-radius:12px;background:#f0f6f1}.sources h3{margin-bottom:9px}.sources p{font-size:.89rem;margin-bottom:8px}.sources a{word-break:break-word}.install-help{padding:13px 16px;margin-top:30px;border-radius:11px;background:#eef5f0;color:#47665e;font-size:.89rem}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:720px){.hero{grid-template-columns:1fr;gap:24px;padding:42px 0 34px}.hero-visual{min-height:0;max-width:560px}.tiles,.feature-grid,.form-grid{grid-template-columns:1fr}.topnav{min-height:66px}.topnav nav a.external-home{display:none}.wrap{width:calc(100% - 28px)}.exam-intro{padding:12px 0}.ad-zone{margin:58px auto 48px}.panel{border-radius:14px}.foot{margin-top:45px}}
@media(max-width:410px){.brand{font-size:.92rem}.topnav nav{gap:12px}.topnav nav a{font-size:.78rem}.btn{width:100%}.actions .btn{width:100%}.quiz-nav button{flex:1}.quiz-question{font-size:1.2rem}.action-row .btn{width:auto;flex:1}.exam-header{align-items:flex-start}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

/* V3: lecciones originales, navegación legible y mejoras móvil */
.topbar{position:relative}.topnav{gap:12px}.topnav nav{gap:clamp(8px,1.5vw,18px)}
.topnav nav a{font-size:.86rem;white-space:nowrap}.brand{white-space:nowrap}
.accent{color:var(--teal)}
.tiles-four{grid-template-columns:repeat(2,minmax(0,1fr))}
.lesson-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:28px 0 40px}
.lesson{background:white;border:1px solid var(--border);border-radius:18px;padding:25px;box-shadow:var(--shadow)}
.lesson h2{font-size:1.35rem;margin:14px 0}.lesson p{color:var(--muted);line-height:1.75}
.area-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:21px 0}
.area-grid article{background:#fff;border:1px solid var(--border);border-radius:13px;padding:18px}
.area-grid h4{margin:0 0 7px;font-size:1rem;color:var(--teal)}.area-grid p{margin:0;font-size:.91rem}
.unmsm-route{border:1px solid #c5ded4;background:#f0f8f2;padding:16px;border-radius:12px;margin:18px 0 23px}
.unmsm-route label{display:block;color:#2a6254;font-weight:850;font-size:.92rem;margin-bottom:8px}
.unmsm-route select{background:#fff}.unmsm-route .small-note{margin:8px 0 0}
.quiz-question{overflow-wrap:anywhere}.choice{overflow-wrap:anywhere}
@media(max-width:900px){.topnav{flex-wrap:wrap;padding:10px 0}.topnav nav{width:100%;justify-content:flex-start;overflow-x:auto;flex-wrap:nowrap;gap:19px;padding:7px 0 6px;scrollbar-width:thin}}
@media(max-width:720px){.tiles-four,.lesson-grid,.area-grid{grid-template-columns:1fr}.lesson{padding:20px}.topnav nav a{font-size:.86rem}.intro p,.hero p,.seo-copy p{font-size:1rem}.ad-zone{margin:48px auto 44px}.quiz-nav .btn{min-height:48px}}
@media(max-width:410px){.topnav nav a{font-size:.83rem}.panel{padding:17px}.choice{font-size:.96rem}.action-row button{min-width:42%}}