/* Identidad visual DBQuiz */
:root{--bg:#f5f4f0;--paper:#fff;--text:#171b2c;--muted:#707786;--line:#e0e1e4;--accent:#a75170;--soft:#f0eff3;--card:#eae5f3;--shadow:#d7d0e3;--purple:#6b4bd2;--purple-soft:#eeebfb;--hero-ink:#231d3d}
html[data-theme=dark]{--bg:#10111b;--paper:#1b1d2b;--text:#f4f2fa;--muted:#a9a9ba;--line:#333548;--accent:#f19cb4;--soft:#262838;--card:#302b4c;--shadow:#090a11;--purple:#ad9aff;--purple-soft:#302949;--hero-ink:#f4efff}
body{background:var(--bg);background-image:radial-gradient(ellipse at 82% 6%,color-mix(in srgb,var(--purple) 10%,transparent),transparent 38%);font-family:'DM Sans',system-ui,sans-serif}
.top{max-width:none;height:78px;padding:0 max(5%,calc((100% - 1280px)/2));background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(18px);position:sticky;top:0;z-index:5}
.brand{letter-spacing:.08em}.brandmark{width:42px;height:42px;background:var(--text);border-radius:13px;font-size:17px}.brand small{font-size:9px;letter-spacing:.17em}.top-actions{gap:22px}.nav-link{color:var(--muted)}.nav-link:hover,.text-link:hover{color:var(--purple)}
.primary{border-radius:12px;padding:16px 22px;transition:transform .18s,box-shadow .18s,background .18s}.primary:hover{transform:translateY(-2px);box-shadow:0 10px 22px #17142924}.primary:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}.small{padding:12px 18px}.icon{transition:transform .2s}.icon:hover{transform:rotate(15deg)}
main{max-width:1400px;padding:0 5%}.hero{grid-template-columns:minmax(0,1fr) minmax(300px,460px);gap:70px;padding:105px 0 112px}.hero .eyebrow{display:inline-flex;align-items:center;background:var(--purple-soft);color:var(--purple);padding:10px 13px;border-radius:99px;font-size:10px;letter-spacing:.13em}.dot{background:var(--purple);box-shadow:0 0 0 4px color-mix(in srgb,var(--purple) 16%,transparent)}
.hero h1{font-size:clamp(60px,7.4vw,100px);line-height:.94;letter-spacing:-.065em;margin:26px 0 23px}.hero h1 em{color:var(--purple)}.hero p{font-size:17px;line-height:1.65;max-width:470px}.hero-actions{margin-top:32px}.hero-actions .primary{background:var(--purple);color:#fff;padding:18px 23px;box-shadow:0 10px 25px color-mix(in srgb,var(--purple) 20%,transparent)}.text-link{border-bottom:1px solid var(--line);padding:12px 0}.micro{margin-top:55px;font-size:10px;letter-spacing:.12em}
.hero-card{position:relative;isolation:isolate;overflow:hidden;min-height:358px;border:1px solid color-mix(in srgb,var(--purple) 21%,var(--line));background:var(--card);border-radius:24px;padding:28px 30px;box-shadow:0 24px 60px color-mix(in srgb,var(--purple) 14%,transparent);color:var(--hero-ink)}.hero-card:before{content:'';position:absolute;z-index:-1;inset:0;background-image:linear-gradient(color-mix(in srgb,var(--purple) 9%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--purple) 9%,transparent) 1px,transparent 1px);background-size:36px 36px;mask-image:linear-gradient(120deg,transparent 20%,#000 100%)}.hero-card:after{content:'♪';position:absolute;right:-14px;top:25px;color:color-mix(in srgb,var(--purple) 11%,transparent);font:700 200px 'Space Grotesk',sans-serif;transform:rotate(-14deg);z-index:-1}.card-top,.card-bottom{color:color-mix(in srgb,var(--hero-ink) 60%,transparent);font-size:10px}.card-top span:last-child{color:var(--purple);letter-spacing:4px}.keyboard{margin:59px 0 27px;gap:10px}.keyboard span{min-width:59px;text-align:center;background:var(--paper);box-shadow:0 5px 0 color-mix(in srgb,var(--purple) 20%,var(--shadow));border-color:color-mix(in srgb,var(--purple) 15%,var(--line));border-radius:11px}.hero-card strong{font-size:30px}.hero-card p{font-size:13px;margin:9px 0 38px;color:color-mix(in srgb,var(--hero-ink) 68%,transparent)}
.catalog{border-top:1px solid var(--line);padding:78px 0 95px}.section-head h2{font-size:clamp(34px,4vw,50px);letter-spacing:-.055em}.section-head .eyebrow{color:var(--purple)}.section-head p{font-size:15px}.count{background:var(--purple-soft);color:var(--purple);border-radius:30px;padding:9px 13px;font-size:11px}.group .count{background:none;padding:0;color:var(--muted)}.controls{margin:34px 0 20px;gap:12px}.search{border-radius:12px;box-shadow:0 4px 18px #1d203008;transition:border .2s,box-shadow .2s}.search:focus-within{border-color:var(--purple);box-shadow:0 0 0 4px color-mix(in srgb,var(--purple) 12%,transparent)}.search span{color:var(--purple)}.search input{height:58px}.switch{border-radius:12px}.switch button{border-radius:9px;min-width:94px}.switch .selected{background:var(--text)}.chips{gap:8px;padding-bottom:24px;scrollbar-width:thin}.chips button{padding:10px 16px;background:var(--paper);font-weight:600;transition:background .15s,color .15s}.chips button:hover{border-color:var(--purple);color:var(--purple)}.chips button.selected{background:var(--purple);border-color:var(--purple);color:#fff}
.group{border-radius:16px;margin-top:16px;box-shadow:0 6px 24px #11132a06}.group h3{background:var(--soft);font-size:15px;padding:19px 23px}.row{padding:17px 23px;transition:background .15s}.row:hover{background:color-mix(in srgb,var(--purple) 5%,var(--paper))}.row small{max-width:650px}.key{border-radius:7px;padding:3px 9px;background:var(--soft);box-shadow:0 2px 0 var(--line);font-size:12px}.practice-band{background:var(--card);border:1px solid color-mix(in srgb,var(--purple) 16%,var(--line));border-radius:22px;padding:45px 48px}.practice-band .eyebrow{color:var(--purple)}.practice-band h2{font-size:clamp(27px,3vw,38px)}footer{max-width:1400px;padding:28px 5% 45px}footer a{color:var(--purple)}
dialog{border-radius:22px;padding:34px;box-shadow:0 30px 100px #0007}dialog::backdrop{background:#0a0b14bc;backdrop-filter:blur(5px)}.quiz-meta{color:var(--purple);font-weight:700;letter-spacing:.08em}.progress{height:6px}.progress span{background:var(--purple)}.quiz-question{font-size:28px}.answer{border-radius:11px;padding:13px 15px;transition:border-color .15s,background .15s}.answer:hover{border-color:var(--purple)}.answer.selected{border-color:var(--purple);background:var(--purple-soft)}.quiz-next{background:var(--purple);color:#fff}.result{color:var(--purple)}
@media(max-width:760px){.top{padding:0 5%;height:70px}.hero{padding:64px 0 75px;gap:38px;grid-template-columns:1fr}.hero h1{font-size:clamp(58px,13vw,80px)}.hero-card{min-height:290px;padding:24px}.keyboard{margin:40px 0 22px}.hero-card p{margin-bottom:25px}.micro{margin-top:40px}.catalog{padding:60px 0}.section-head .count{display:inline-block;margin-top:16px}.controls{flex-direction:column}.switch button{min-height:44px}.row{grid-template-columns:1fr;gap:8px}.keys{justify-self:start;text-align:left}.practice-band{padding:30px;display:block}.practice-band button{margin-top:18px}footer{flex-direction:column}dialog{padding:24px}.quiz-question{font-size:24px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}
html[data-theme=dark] .hero-actions .primary,html[data-theme=dark] .quiz-next,html[data-theme=dark] .chips button.selected{color:#191329}
@media(max-width:760px){.brand small{white-space:nowrap;font-size:8px}.brand{gap:8px;font-size:11px}.brandmark{width:38px;height:38px;flex-shrink:0}.top-actions{gap:8px}.top-actions .small{padding:12px;font-size:11px;white-space:nowrap}.top-actions .small span{margin-left:5px}.hero-actions{gap:14px}.hero-actions .primary{padding:16px;white-space:nowrap;font-size:13px}.hero-actions .primary span{margin-left:8px}.text-link{font-size:12px;white-space:nowrap}}
.group-head{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--soft);padding-right:16px}.group-head h3{flex:1;min-width:0;background:transparent}.group-toggle{flex:none;display:grid;place-items:center;width:36px;height:36px;border:1px solid var(--line);border-radius:9px;background:var(--paper);color:var(--text);font-size:23px;line-height:1;box-shadow:0 3px 0 var(--line);transition:transform .16s,box-shadow .16s}.group-toggle:focus-visible{outline:3px solid var(--accent);outline-offset:3px}@media(hover:hover){.group-toggle:hover{transform:translateY(2px);box-shadow:0 1px 0 var(--line)}}.group-toggle:active{transform:translateY(3px);box-shadow:none}@media(prefers-reduced-motion:reduce){.group-toggle{transition:none}}
/* Más énfasis en cada acción y respuesta táctil en los controles. */
.row>div:first-child{font-size:16px;font-weight:700;line-height:1.4;letter-spacing:-.015em;color:var(--text)}
.row .key{font-size:14px;font-weight:700;color:var(--text)}
.row small{font-weight:400;letter-spacing:0;color:var(--muted)}
.primary,.icon,.chips button,.switch button,.answer{transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,border-color .16s ease}
.primary:not(:disabled),.icon,.chips button,.switch button,.answer{box-shadow:0 4px 0 color-mix(in srgb,var(--text) 22%,transparent)}
.hero-actions .primary:not(:disabled){box-shadow:0 5px 0 color-mix(in srgb,var(--purple) 60%,#12101c)}
@media(hover:hover){.primary:not(:disabled):hover,.hero-actions .primary:not(:disabled):hover,.icon:hover,.chips button:hover,.switch button:hover,.answer:hover{transform:translateY(3px);box-shadow:0 1px 0 color-mix(in srgb,var(--text) 25%,transparent)}}
.primary:not(:disabled):active,.icon:active,.chips button:active,.switch button:active,.answer:active{transform:translateY(4px);box-shadow:none}
@media(prefers-reduced-motion:reduce){.primary,.icon,.chips button,.switch button,.answer{transition:none}}
/* Paleta del curso: carbón, blanco cálido, naranja y turquesa. */
:root{--bg:#f7f4eb;--paper:#fffdfa;--text:#161918;--muted:#606e6b;--line:#d8ded8;--accent:#a33c20;--soft:#eeeae0;--card:#dcefeb;--shadow:#c8d8d1;--purple:#a83c20;--purple-soft:#f8e4dc;--hero-ink:#162622;--teal:#087d80}
html[data-theme=dark]{--bg:#0d1213;--paper:#171e1f;--text:#f8f3e3;--muted:#aab9b4;--line:#31403c;--accent:#ff9374;--soft:#222e2c;--card:#133536;--shadow:#050909;--purple:#ff805c;--purple-soft:#42302a;--hero-ink:#f6f4e8;--teal:#4ae0d8}
.hero-card:before{background-image:linear-gradient(color-mix(in srgb,var(--teal) 12%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--teal) 12%,transparent) 1px,transparent 1px)}
.hero-card:after{color:color-mix(in srgb,var(--teal) 15%,transparent)}
.hero-card .keyboard span:last-child{border-color:color-mix(in srgb,var(--teal) 45%,var(--line))}
.hero-actions .primary:not(:disabled),.quiz-next,.chips button.selected{color:#fff}
html[data-theme=dark] .hero-actions .primary:not(:disabled),html[data-theme=dark] .quiz-next,html[data-theme=dark] .chips button.selected{color:#25120c}
/* Respuesta visual de las teclas de los atajos. */
.key{transition:transform .16s ease,box-shadow .16s ease;cursor:default}
@media(hover:hover){.key:hover{transform:translateY(2px);box-shadow:0 0 0 var(--line)}}
.key:active{transform:translateY(2px);box-shadow:0 0 0 var(--line)}
@media(prefers-reduced-motion:reduce){.key{transition:none}}
.brand{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:6px;text-decoration:none}.brand-logo{display:block;width:174px;line-height:0}.brand-logo img{display:block;width:100%;height:auto}.brand-logo .logo-dark{display:none}html[data-theme=dark] .brand-logo .logo-light{display:none}html[data-theme=dark] .brand-logo .logo-dark{display:block}.brand-caption{font-size:9px;line-height:1;color:var(--muted);letter-spacing:.16em;font-weight:700}@media(max-width:760px){.brand-logo{width:140px}.brand-caption{font-size:8px}.brand{gap:5px}}@media(max-width:350px){.brand-logo{width:118px}.top-actions .small{padding:10px}}
.brand{align-items:center}.brand-caption{width:100%;text-align:center}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:7px;line-height:1.5;letter-spacing:0;font-weight:400}.footer-brand strong{color:var(--text);font-size:11px;letter-spacing:.06em}.footer-brand span{font-size:11px}
.footer-identity{display:flex;align-items:center;gap:10px;min-height:20px}.footer-identity .footer-logo{width:118px;line-height:0;flex:none}
.login-intro{color:var(--muted);line-height:1.6;margin:0 0 25px}.login-form{display:grid;gap:10px}.login-form label{font-size:13px;font-weight:700;margin-top:12px}.login-form input{width:100%;padding:15px;border:1px solid var(--line);border-radius:10px;background:var(--soft);color:var(--text);font:inherit}.login-form input::placeholder{color:var(--muted);opacity:1}.login-form input:disabled{opacity:1}.login-form .quiz-next{margin:2px 0 0}.login-enter{width:100%;padding:15px;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--muted);font-weight:700;opacity:.7;cursor:not-allowed}.login-notice{background:var(--soft);border-radius:10px;padding:14px 16px;color:var(--muted);font-size:12px;line-height:1.5;margin:4px 0 0}
.question-points{color:var(--purple);font-size:.65em;letter-spacing:0;white-space:nowrap}
.login-demo{display:block;width:100%;margin-top:14px;padding:14px;border:1px solid var(--purple);border-radius:10px;background:transparent;color:var(--purple);font-weight:700}.login-demo:hover{background:var(--purple-soft)}
.login-enter:not(:disabled){color:var(--text);opacity:1;cursor:pointer;border-color:var(--purple)}.login-enter:not(:disabled):hover{background:var(--purple-soft)}.login-enter:focus-visible,.login-form input:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.level-list{display:grid;gap:11px}.level-option{display:flex;justify-content:space-between;align-items:center;gap:16px;width:100%;padding:18px;text-align:left;background:var(--paper);border:1px solid var(--line);border-radius:12px;color:var(--text);transition:transform .16s,border-color .16s,background .16s}.level-option strong,.level-option small{display:block}.level-option strong{font-size:16px}.level-option small{margin-top:5px;color:var(--muted);font-size:12px;line-height:1.4}.level-option>span:last-child{font-size:20px;color:var(--purple)}.level-option:hover{border-color:var(--purple);background:var(--purple-soft);transform:translateY(2px)}.level-option:focus-visible{outline:3px solid var(--accent);outline-offset:3px}@media(prefers-reduced-motion:reduce){.level-option{transition:none}}
.key-or{color:var(--muted);font-size:12px;font-weight:600;padding:0 4px}
dialog{max-height:90vh;overflow-y:auto}
.dialog-actions{display:flex;align-items:center;gap:10px}.dialog-actions .icon:disabled{opacity:.4;cursor:not-allowed;box-shadow:none;transform:none}
#quiz-back:not([hidden]){display:grid;place-items:center;color:var(--text);background:var(--soft);border-color:var(--muted)}
#quiz-back:disabled{opacity:.4}
#close{color:var(--text);background:var(--soft);border-color:var(--muted);font-weight:700}

.login-notice.is-unregistered{font-size:16px;font-weight:700;line-height:1.5;color:var(--text);background:var(--purple-soft);border:1px solid var(--purple);padding:17px 18px}

/* Historial de prácticas de cada alumno. */
.history-link{display:flex;align-items:center;justify-content:space-between;width:100%;margin-top:20px;padding:17px 18px;border:1px solid var(--purple);border-radius:12px;background:var(--purple-soft);color:var(--text);font:inherit;font-weight:700;text-align:left}
.history-link span:last-child{font-size:20px;color:var(--purple)}
.history-link:hover{background:color-mix(in srgb,var(--purple) 20%,var(--paper))}
.history-link:focus-visible,.history-text-button:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.history-content{color:var(--muted);line-height:1.5}
.history-empty,.result-save-status{padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--soft);color:var(--text);font-size:14px;line-height:1.5}
.history-list{display:grid;gap:10px}.history-item{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--soft)}
.history-item strong,.history-item span{display:block}.history-item strong{font-size:16px;color:var(--text)}.history-item span{margin-top:4px;color:var(--muted);font-size:12px}.history-item b{color:var(--purple);white-space:nowrap;font-size:21px}.history-item b small{font-size:12px}
.history-footnote{font-size:12px;color:var(--muted)}.history-text-button{display:block;margin:8px 0 0;padding:0;border:0;background:none;color:var(--purple);font:inherit;font-weight:700;text-align:left;text-decoration:underline;cursor:pointer}
.level-screen>.result-save-status{margin-bottom:16px}