/* Acordeón From Zero / Accordion From Zero — shared styles.
   Same type pairing and dark stage as Requinto From Zero (Big Shoulders Display + Archivo); own crimson identity.
   Colour roles (WCAG 2.1 AA, checked with axe and tools/contrast notes in docs/BRAND.md):
   --crimson      #C92D39  fills, buttons (with white text 5.4:1), rings, progress, large display text (≥3:1)
   --crimson-dk   #971F32  hover / pressed / secondary fills only (never text on dark)
   --crimson-hi   #EC5F69  small text and links on dark surfaces (≥5.2:1); crimson itself is too dark for small text
   --warn         #E6A645  functional warnings only ("needs musical review"), not branding
   --pull         blue for the pull bellows direction (functional), --ok / --bad for feedback */
@font-face{font-family:"Big Shoulders Display";src:url("/fonts/big-shoulders-display.woff2") format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"Archivo";src:url("/fonts/archivo.woff2") format("woff2");font-weight:100 900;font-stretch:62% 125%;font-display:swap}
:root{
  --bg:#06080B; --s1:#0c0f13; --s2:#11151a; --s3:#171c22; --line:#232a31; --line2:#2e363e;
  --crimson:#C92D39; --crimson-dk:#971F32; --crimson-hi:#EC5F69; --crimson-dim:rgba(201,45,57,.14); --on-crimson:#FFFFFF;
  --warn:#E6A645; --warn-dim:rgba(230,166,69,.12); --warn-line:#6b5326;
  --pull:#7cc8f8; --pull-dim:rgba(124,200,248,.13);
  --bone:#E8E4E2; --muted:#A8A4A1; --steel:#928E8B;
  --ok:#62d49a; --bad:#ff7a6b;
  --display:"Big Shoulders Display","Arial Narrow","Roboto Condensed",Impact,sans-serif;
  --body:"Archivo",system-ui,-apple-system,"Segoe UI",sans-serif;
  --r:12px;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--bone);font-family:var(--body);font-size:18px;line-height:1.6;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;z-index:100;pointer-events:none;opacity:.06;mix-blend-mode:overlay;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>")}
img,svg{max-width:100%;display:block}
a{color:var(--crimson-hi)}
:focus-visible{outline:2px solid var(--crimson-hi);outline-offset:3px;border-radius:6px}
.wrap{max-width:1180px;margin:0 auto;padding:0 22px}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:200;background:var(--crimson);color:var(--on-crimson);padding:10px 14px;border-radius:8px;font-weight:700}
.skip:focus{top:12px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}

/* bellows-fold motif */
.folds{height:14px;background:repeating-linear-gradient(90deg,var(--crimson) 0 2px,transparent 2px 18px),linear-gradient(90deg,transparent,rgba(201,45,57,.25),transparent);opacity:.55;-webkit-mask:linear-gradient(90deg,transparent,#000 15%,#000 85%,transparent);mask:linear-gradient(90deg,transparent,#000 15%,#000 85%,transparent)}

/* preview bar */
.preview{background:repeating-linear-gradient(135deg,#2a1e0c 0 12px,#251a0a 12px 24px);color:var(--warn);font-size:13.5px;text-align:center;padding:7px 16px;border-bottom:1px solid #4a3414}
.preview b{color:#fff}

/* header */
.top{position:sticky;top:0;z-index:30;background:rgba(6,8,11,.88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:14px;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--bone)}
.brand span{font:800 23px/1 var(--display);text-transform:uppercase;letter-spacing:.02em;white-space:nowrap}
.brand em{font-style:normal;color:var(--crimson)}
.nav{display:flex;gap:2px;margin-left:auto}
.nav a{color:var(--muted);text-decoration:none;font-weight:500;font-size:15px;padding:8px 11px;border-radius:6px}
.nav a:hover,.nav a[aria-current="page"]{color:var(--bone);background:var(--s2)}
.lang{display:flex;border:1px solid var(--line2);border-radius:7px;padding:2px}
.lang a{color:var(--muted);text-decoration:none;font:700 12px var(--body);letter-spacing:.08em;padding:7px 10px;border-radius:5px}
.lang a[aria-current="true"]{background:var(--bone);color:var(--bg)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:0;border-radius:9px;background:var(--crimson);color:var(--on-crimson);font:700 16px var(--body);font-stretch:108%;padding:14px 22px;cursor:pointer;text-decoration:none;white-space:nowrap;transition:background .12s,transform .12s,box-shadow .12s}
.btn:hover{background:var(--crimson-dk)}
.btn:active{transform:translateY(1px)}
.btn.ghost{background:transparent;color:var(--bone);box-shadow:inset 0 0 0 1px var(--line2)}
.btn.ghost:hover{box-shadow:inset 0 0 0 1px var(--crimson);color:#fff}
.btn.sm{padding:10px 15px;font-size:14px}
.btn[disabled]{opacity:.45;cursor:not-allowed}
@media (max-width:960px){.nav{display:none}.lang{margin-left:auto}}
@media (max-width:540px){.top .btn{display:none}.brand span{font-size:20px}}

/* hero */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero::after{content:"";position:absolute;left:45%;top:-30%;width:70%;height:150%;background:radial-gradient(closest-side,rgba(201,45,57,.16),transparent 70%);pointer-events:none}
.hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);gap:40px;align-items:center;padding-top:60px;padding-bottom:64px}
@media (max-width:980px){.hero .wrap{grid-template-columns:1fr;padding-top:40px}}
.eyebrow{font:700 13px var(--body);font-stretch:125%;letter-spacing:.24em;text-transform:uppercase;color:var(--crimson-hi)}
h1{margin:14px 0 0;font:900 clamp(54px,7.4vw,100px)/.86 var(--display);text-transform:uppercase;letter-spacing:-.01em}
h1 .b{display:block;color:var(--crimson)}
.lede{font-size:clamp(18px,2vw,21px);color:var(--muted);max-width:34em;margin:22px 0 0}
.lede b{color:var(--bone);font-weight:600}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.trust{display:flex;flex-wrap:wrap;gap:8px 20px;margin:22px 0 0;padding:0;list-style:none;font-size:14.5px;color:var(--muted)}
.trust li::before{content:"✓";color:var(--crimson-hi);font-weight:800;margin-right:8px}
.hero-demo{background:linear-gradient(180deg,var(--s1),var(--bg));border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:0 30px 80px -30px rgba(0,0,0,.8)}
.hero-demo .cap{font-size:13.5px;color:var(--muted);margin:0 4px 10px;display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap}
.hero-demo .cap b{color:var(--bone)}

/* sections */
section{padding:84px 0;border-bottom:1px solid var(--line)}
section.alt{background:var(--s1)}
.sec-head{max-width:760px;margin-bottom:40px}
h2{margin:0;font:800 clamp(38px,5vw,60px)/.95 var(--display);text-transform:uppercase}
h2 em{font-style:normal;color:var(--crimson)}
.sec-head p{color:var(--muted);font-size:19px;margin:16px 0 0}
h3{font:700 21px/1.25 var(--body);font-stretch:105%;margin:0 0 8px}

/* comparison */
.vs{border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.vs-row{display:grid;grid-template-columns:160px 1fr 1fr;border-top:1px solid var(--line)}
.vs-row:first-child{border-top:0}
.vs-row>*{padding:16px 20px;margin:0}
.vs-row span{font-weight:700;color:var(--muted);font-size:15px;text-transform:uppercase;letter-spacing:.06em}
.vs-row p{color:var(--steel)}
.vs-row .us{color:var(--bone);background:var(--crimson-dim)}
.vs-head b{padding:14px 20px;font-size:15px}
.vs-head b.us{color:var(--crimson-hi)}
@media (max-width:760px){.vs-row{grid-template-columns:1fr}.vs-row span{padding-bottom:0}.vs-head{display:none}.vs-row p:not(.us)::before{content:attr(data-l) " ";font-weight:700;color:var(--steel)}.vs-row .us::before{content:attr(data-l) " ";font-weight:700;color:var(--crimson-hi)}}

/* how it works */
.how{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:s;list-style:none;padding:0;margin:0}
.how li{background:var(--s2);border:1px solid var(--line);border-radius:var(--r);padding:22px;counter-increment:s;position:relative}
.how li::before{content:"0" counter(s);font:800 44px/1 var(--display);color:var(--crimson);display:block;margin-bottom:14px}
.how p{color:var(--muted);margin:0;font-size:16px}
@media (max-width:900px){.how{grid-template-columns:1fr 1fr}}
@media (max-width:540px){.how{grid-template-columns:1fr}}

/* curriculum */
.curric{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:14px}
.cur{display:grid;grid-template-columns:56px 1fr;gap:14px;background:var(--s2);border:1px solid var(--line);border-radius:var(--r);padding:20px;text-decoration:none;color:inherit;transition:border-color .15s,transform .15s}
a.cur:hover{border-color:var(--crimson);transform:translateY(-2px)}
.cur .n{font:800 40px/1 var(--display);color:var(--line2)}
.cur.live .n{color:var(--crimson)}
.cur h3{font-size:19px}
.cur p{margin:0;color:var(--muted);font-size:15.5px}
.meta{display:flex;flex-wrap:wrap;gap:6px 10px;margin-top:12px;font-size:13px;color:var(--steel)}
.tag{display:inline-block;padding:3px 8px;border-radius:5px;border:1px solid var(--line2);font-size:12px;font-weight:700;letter-spacing:.04em;text-transform:uppercase}
.tag.free{border-color:var(--crimson);color:var(--crimson-hi)}
.tag.soon{color:var(--steel)}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(2,minmax(0,320px));gap:16px}
@media (max-width:700px){.plans{grid-template-columns:1fr}}
.plan{background:var(--s2);border:1px solid var(--line);border-radius:16px;padding:26px}
.plan.best{border-color:var(--crimson)}
.price{font:800 56px/1 var(--display);margin:12px 0 4px}
.price small{font:500 16px var(--body);color:var(--muted);margin-left:6px}
.plan p{color:var(--muted);margin:6px 0 0;font-size:15.5px}
.plan ul{margin:16px 0 0;padding-left:20px;color:var(--muted);font-size:15.5px}
.notice{border:1px dashed var(--crimson);background:var(--crimson-dim);border-radius:var(--r);padding:16px 20px;margin:0 0 26px;max-width:760px;font-size:16px}
.fineprint{font-size:14px;color:var(--steel);max-width:760px;margin-top:20px}

/* faq */
.faq{max-width:820px}
.faq details{border-top:1px solid var(--line);padding:18px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:600;font-size:19px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::after{content:"+";color:var(--crimson-hi);font-weight:800}
.faq details[open] summary::after{content:"–"}
.faq p{color:var(--muted);margin:12px 0 0}

/* cta band */
.band{text-align:center}
.band h2{max-width:900px;margin:0 auto}
.band p{color:var(--muted);margin:16px auto 28px;max-width:640px}

/* footer */
footer{padding:44px 0 60px;color:var(--steel);font-size:14.5px}
footer .wrap{display:flex;flex-wrap:wrap;gap:18px 40px;justify-content:space-between}
footer nav{display:flex;flex-wrap:wrap;gap:8px 18px}
footer a{color:var(--muted);text-decoration:none}
footer a:hover{color:var(--bone)}

/* ================= accordion simulator ================= */
.acc{container-type:inline-size;display:grid;gap:12px}
.acc-main{--size:clamp(30px,calc((100cqw - 116px) / 12.8),56px)}
.acc-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between}
.acc-dir{display:grid;grid-template-columns:1fr 1fr;gap:6px;flex:1 1 300px;max-width:440px}
.acc-dir button{display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;column-gap:10px;align-items:center;text-align:left;border:1px solid var(--line2);background:var(--s2);color:var(--muted);border-radius:10px;padding:8px 12px;cursor:pointer;font:inherit}
.acc-dir button b{font-size:16px;color:var(--bone)}
.acc-dir button small{grid-column:2;font-size:12px;line-height:1.2}
.acc-arrow{grid-row:span 2;font:800 18px/1 var(--display);letter-spacing:-.05em;width:34px;text-align:center}
.acc-dir .acc-dir-push[aria-pressed="true"]{background:var(--crimson);border-color:var(--crimson);color:var(--on-crimson)}
.acc-dir .acc-dir-pull[aria-pressed="true"]{background:var(--pull);border-color:var(--pull);color:#06202f}
.acc-dir button[aria-pressed="true"] b{color:inherit}
.acc-both{font-size:13.5px;color:var(--muted);display:inline-flex;gap:8px;align-items:center;cursor:pointer}
.acc-both input{accent-color:var(--crimson);width:17px;height:17px}
.acc-main{overflow-x:auto;padding-bottom:4px}
.acc-treble{position:relative;display:grid;gap:6px;min-width:440px;background:linear-gradient(180deg,#14181d,#0b0d10);border:1px solid var(--line);border-radius:14px;padding:12px 12px 14px}
.acc-bellows{height:20px;border-radius:6px;margin-bottom:4px;background:repeating-linear-gradient(90deg,#5a1a22 0 3px,#160d10 3px 9px);display:flex;align-items:center;justify-content:center;transition:background-size .3s}
.acc-bellows span{font:700 10.5px var(--body);letter-spacing:.24em;text-transform:uppercase;color:var(--bone);background:#0d0a0c;padding:1px 8px;border-radius:4px}
.acc[data-dir="pull"] .acc-bellows{background:repeating-linear-gradient(90deg,#173244 0 3px,#0c1820 3px 14px)}
.acc[data-dir="pull"] .acc-bellows span{color:var(--pull)}
.acc-row{display:grid;grid-template-columns:76px 1fr;align-items:center;gap:8px;transition:opacity .2s}
.acc-row.dim{opacity:.6}
.acc-rowlabel{font-size:11.5px;line-height:1.2;color:var(--muted)}
.acc-rowlabel b{display:block;color:var(--bone);font-size:12px}
.acc-rowlabel span{font:800 20px/1 var(--display);color:var(--crimson)}
.acc-keys{display:flex;gap:calc(var(--size) * .1)}
.acc-row-inner .acc-keys,.acc-row-outer .acc-keys{padding-left:calc(var(--size) * .55)}
.acc-btn{position:relative;flex:0 0 var(--size);width:var(--size);height:var(--size);border-radius:50%;border:1px solid #3d434b;background:radial-gradient(circle at 35% 30%,#F6F3F1,#E8E4E2 60%,#CBC5C1);color:#1a1d21;cursor:pointer;padding:0;display:grid;grid-template-rows:1fr 1fr;place-items:center;font:700 13px/1 var(--body);touch-action:none;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent;transition:transform .06s,box-shadow .1s}
.acc-btn::after{content:"";position:absolute;left:14%;right:14%;top:50%;border-top:1px solid rgba(0,0,0,.25)}
.acc-btn .n{position:absolute;top:-7px;right:-5px;font-size:9.5px;background:var(--bg);color:var(--bone);border-radius:9px;padding:2px 5px;border:1px solid var(--line2)}
.acc-btn .push,.acc-btn .pull{font-size:calc(var(--size) * .25);transition:opacity .15s,color .15s}
.acc-btn .push{align-self:end;padding-bottom:2px}
.acc-btn .pull{align-self:start;padding-top:2px}
.acc[data-dir="push"] .acc-btn .pull,.acc[data-dir="pull"] .acc-btn .push{opacity:.38}
.acc[data-dir="push"] .acc-btn .push{color:var(--crimson-dk);font-size:calc(var(--size) * .29)}
.acc[data-dir="pull"] .acc-btn .pull{color:#0d4a72;font-size:calc(var(--size) * .29)}
.acc.acc-single .acc-btn{grid-template-rows:1fr}
.acc.acc-single .acc-btn::after{display:none}
.acc.acc-single[data-dir="push"] .acc-btn .pull,.acc.acc-single[data-dir="pull"] .acc-btn .push{display:none}
.acc.acc-single .acc-btn .push,.acc.acc-single .acc-btn .pull{align-self:center;padding:0;font-size:calc(var(--size) * .36)}
.acc-btn.helper{background:radial-gradient(circle at 35% 30%,#3d434b,#252a31);color:#E8E4E2;border-style:dashed}
.acc-btn.helper .push,.acc-btn.helper .pull{color:#E8E4E2!important}
.acc-btn.target{box-shadow:0 0 0 3px var(--bg),0 0 0 6px var(--crimson);animation:pulse 1.6s ease-in-out infinite}
.acc[data-dir="pull"] .acc-btn.target{box-shadow:0 0 0 3px var(--bg),0 0 0 6px var(--pull)}
@keyframes pulse{50%{box-shadow:0 0 0 3px var(--bg),0 0 0 9px rgba(201,45,57,.5)}}
.acc-btn.on{transform:scale(.93);background:radial-gradient(circle at 40% 35%,#e0555f,var(--crimson));color:#fff;box-shadow:0 0 22px rgba(201,45,57,.6)}
.acc[data-dir="pull"] .acc-btn.on{background:radial-gradient(circle at 40% 35%,#bfe6ff,var(--pull));box-shadow:0 0 22px rgba(124,200,248,.6)}
.acc-btn.on .push,.acc-btn.on .pull{opacity:1!important}
.acc-btn.ok{box-shadow:0 0 0 3px var(--bg),0 0 0 6px var(--ok)!important}
.acc-btn.bad{box-shadow:0 0 0 3px var(--bg),0 0 0 6px var(--bad)!important;animation:shake .3s}
@keyframes shake{25%{translate:-3px 0}75%{translate:3px 0}}
.acc-btn .fg{position:absolute;bottom:-8px;left:50%;translate:-50% 0;background:var(--crimson);color:var(--on-crimson);font-size:10px;font-weight:800;border-radius:9px;padding:2px 6px}
.acc-out{min-height:46px;background:var(--s2);border:1px solid var(--line);border-radius:10px;padding:11px 14px;font-weight:600;font-size:16px}
.acc-bass{background:var(--s1);border:1px solid var(--line);border-radius:14px;padding:12px 14px}
.acc-bass-h{margin:0 0 10px;font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);display:flex;gap:8px;align-items:center}
.acc-flag{font-size:10.5px;letter-spacing:.06em;border:1px solid var(--warn-line);color:var(--warn);border-radius:5px;padding:2px 6px;cursor:help}
.acc-bassrow{display:flex;gap:6px;margin-bottom:6px}
.acc-bassrow:nth-child(odd){padding-left:22px}
.acc-bbtn{width:44px;height:44px;border-radius:50%;border:1px solid #3d434b;background:#22272e;color:var(--bone);display:grid;grid-template-rows:1fr 1fr;place-items:center;font:700 11.5px/1 var(--body);cursor:pointer;padding:0}
.acc-bbtn.chord{background:#2e343c}
.acc-bbtn.on{background:var(--crimson);color:var(--on-crimson)}
.acc[data-dir="push"] .acc-bbtn .pull,.acc[data-dir="pull"] .acc-bbtn .push{opacity:.75}
.acc-fine{font-size:12.5px;color:var(--steel);margin:4px 0 0;line-height:1.45}
@container (max-width:640px){.acc-main{--size:clamp(30px,calc((100cqw - 110px) / 12.2),48px)}.acc-row{grid-template-columns:60px 1fr}.acc-rowlabel b{font-size:10.5px}}

/* ================= app: lesson, dashboard, practice ================= */
.app-main{padding:34px 0 80px}
.crumbs{font-size:14px;color:var(--steel);margin-bottom:10px}
.crumbs a{color:var(--bone);text-decoration:underline;text-underline-offset:3px}
.lesson-head h1{font-size:clamp(40px,6vw,72px)}
.lesson-head .lede{margin-top:12px}
.stepper{display:flex;gap:4px;margin:26px 0 18px}
.stepper i{flex:1;height:6px;border-radius:3px;background:var(--line)}
.stepper i.st-past{background:var(--crimson)}
.stepper i.st-now{background:var(--crimson-hi);box-shadow:0 0 10px rgba(201,45,57,.6)}
.card{background:var(--s1);border:1px solid var(--line);border-radius:16px;padding:clamp(18px,3vw,30px)}
.card h2{font-size:clamp(30px,4vw,44px);margin-bottom:14px}
.card p{margin:0 0 12px}
.card ul{padding-left:22px;margin:8px 0 12px}
.card li{margin-bottom:6px}
.objective{border-left:3px solid var(--crimson);padding:4px 0 4px 16px;color:var(--bone);font-size:19px}
.hint{color:var(--muted);font-size:15.5px}
.finger{display:inline-flex;gap:8px;align-items:center;font-size:15px;background:var(--crimson-dim);border:1px solid #5a1f28;border-radius:8px;padding:6px 12px;margin:2px 0 14px}
.seq{display:flex;flex-wrap:wrap;gap:6px;margin:6px 0 16px;padding:0;list-style:none}
.seq li{border:1px solid var(--line2);border-radius:8px;padding:6px 10px;font-size:14px;color:var(--muted);margin:0}
.seq li.push{border-color:#6a2430}
.seq li.pull{border-color:#24465c}
.seq li.done{background:var(--ok);border-color:var(--ok);color:#06210f}
.seq li.now{border-color:var(--crimson-hi);color:var(--bone)}
.feedback{border-radius:10px;padding:12px 16px;margin:14px 0 0;font-size:16px}
.feedback.ok{background:rgba(98,212,154,.12);border:1px solid rgba(98,212,154,.5)}
.feedback.bad{background:rgba(255,122,107,.1);border:1px solid rgba(255,122,107,.45)}
.feedback.info{background:var(--s2);border:1px solid var(--line2)}
.opts{display:grid;gap:8px;margin:14px 0}
.opts button{text-align:left;border:1px solid var(--line2);background:var(--s2);color:var(--bone);border-radius:10px;padding:14px 16px;font:500 17px var(--body);cursor:pointer}
.opts button:hover{border-color:var(--crimson)}
.opts button.ok{border-color:var(--ok);background:rgba(98,212,154,.12)}
.opts button.bad{border-color:var(--bad);background:rgba(255,122,107,.1)}
.opts.notes{grid-template-columns:repeat(4,1fr)}
.qcount{font-size:13px;color:var(--steel);letter-spacing:.1em;text-transform:uppercase;font-weight:700}
.navrow{display:flex;justify-content:space-between;gap:12px;margin-top:20px;flex-wrap:wrap}
.parts-fig{background:var(--s2);border:1px solid var(--line);border-radius:12px;padding:12px;margin:8px 0 16px}
.parts-fig text{font-family:var(--body)}
.honest{font-size:14.5px;color:var(--muted);border:1px dashed var(--line2);border-radius:10px;padding:10px 14px}
.done-card{text-align:center}
.done-card .big{font:900 72px/1 var(--display);color:var(--crimson)}
.skeleton{height:220px;border-radius:16px;background:linear-gradient(90deg,var(--s1),var(--s2),var(--s1));background-size:200% 100%;animation:sk 1.4s linear infinite}
@keyframes sk{to{background-position:-200% 0}}

.dash-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:22px}
@media (max-width:900px){.dash-grid{grid-template-columns:1fr 1fr}}
.tile{background:var(--s1);border:1px solid var(--line);border-radius:14px;padding:18px}
.tile .k{font-size:13px;color:var(--steel);text-transform:uppercase;letter-spacing:.08em;font-weight:700}
.tile .v{font:800 46px/1.05 var(--display);margin-top:6px}
.tile .s{font-size:14px;color:var(--muted)}
.tile.wide{grid-column:span 2}
@media (max-width:540px){.tile.wide{grid-column:span 2}}
.bar{height:10px;background:var(--line);border-radius:5px;overflow:hidden;margin-top:10px}
.bar i{display:block;height:100%;background:var(--crimson);border-radius:5px}
.resume{display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;background:linear-gradient(110deg,var(--s2),#2a1015);border:1px solid #5a1f28;border-radius:16px;padding:24px}
.resume h2{font-size:clamp(28px,4vw,42px)}
.path{display:grid;gap:14px;margin-top:28px}
.pcourse{background:var(--s1);border:1px solid var(--line);border-radius:14px;padding:18px}
.pcourse header{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:baseline}
.pcourse h3{margin:0}
.nodes{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px;align-items:center}
.node{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;border:2px solid var(--line2);color:var(--steel);font-weight:800;text-decoration:none;font-size:15px;position:relative;background:var(--s2)}
.node.open{border-color:var(--crimson);color:var(--bone)}
.node.free::after{content:"FREE";position:absolute;bottom:-9px;font-size:9px;background:var(--crimson);color:var(--on-crimson);border-radius:5px;padding:1px 4px}
:lang(es) .node.free::after{content:"GRATIS"}
.node.done{background:var(--ok);border-color:var(--ok);color:#06210f}
.node.locked{opacity:.55}
.node + .node::before{content:"";position:absolute;right:100%;width:10px;border-top:2px dotted var(--line2)}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:10px;margin-top:12px}
.badge{border:1px solid var(--line);border-radius:12px;padding:14px;background:var(--s1)}
.badge b{display:block}
.badge span{font-size:13.5px;color:var(--steel)}
.badge.earned{border-color:var(--crimson);background:var(--crimson-dim)}
.badge .ic{font-size:22px;filter:grayscale(1);opacity:.5}
.badge.earned .ic{filter:none;opacity:1}
.tools{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px;margin-top:12px}
.tools a,.tools div{display:block;text-decoration:none;color:inherit;background:var(--s1);border:1px solid var(--line);border-radius:12px;padding:16px}
.tools a:hover{border-color:var(--crimson)}
.tools p{margin:4px 0 0;font-size:14.5px;color:var(--muted)}

.practice-grid{display:grid;grid-template-columns:1fr;gap:18px;align-items:start}
.practice-grid>div{grid-template-columns:1fr 1fr}
@media (max-width:820px){.practice-grid>div{grid-template-columns:1fr}}
.metro{display:grid;gap:12px}
.metro .bpm{font:800 64px/1 var(--display)}
.metro input[type=range]{width:100%;accent-color:var(--crimson)}
.beats{display:flex;gap:8px}
.beats i{width:22px;height:22px;border-radius:50%;background:var(--line)}
.beats i.on{background:var(--crimson)}
.beats i.on.acc1{background:var(--crimson-hi);box-shadow:0 0 12px var(--crimson)}
.timer .clock{font:800 64px/1 var(--display);font-variant-numeric:tabular-nums}
.seg2{display:flex;gap:6px}
.seg2 button{border:1px solid var(--line2);background:var(--s2);color:var(--muted);border-radius:8px;padding:8px 12px;font:600 14px var(--body);cursor:pointer}
.seg2 button[aria-pressed="true"],.seg2 button[aria-selected="true"]{background:var(--bone);color:var(--bg)}
.prose{max-width:760px}
.prose h2{font-size:clamp(32px,4vw,46px);margin:40px 0 12px}
.prose p,.prose li{color:var(--muted)}

/* ================= Phase 2–6 components ================= */
.nav-acct{color:var(--muted);text-decoration:none;font-weight:600;font-size:14.5px;padding:8px 6px;white-space:nowrap}
.nav-acct:hover{color:var(--bone)}
@media (max-width:540px){.nav-acct{font-size:13.5px}}
.statband{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden;margin-top:-1px;margin-bottom:0;padding:0}
.statband>div{background:var(--s1);padding:20px 22px}
.statband b{display:block;font:800 44px/1 var(--display);color:var(--crimson)}
.statband span{color:var(--muted);font-size:14.5px}
@media (max-width:760px){.statband{grid-template-columns:1fr 1fr}}
.consent{position:fixed;left:16px;right:16px;bottom:16px;z-index:60;max-width:760px;margin:0 auto;background:var(--s2);border:1px solid var(--line2);border-radius:14px;padding:16px 18px;display:flex;flex-wrap:wrap;gap:12px 18px;align-items:center;justify-content:space-between;box-shadow:0 20px 60px -20px #000}
.consent p{margin:0;font-size:14.5px;color:var(--muted);flex:1 1 380px}
.consent div{display:flex;gap:8px}
.lessons{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.lrow a{display:grid;grid-template-columns:40px 1fr auto;gap:14px;align-items:center;background:var(--s1);border:1px solid var(--line);border-radius:12px;padding:14px 16px;text-decoration:none;color:inherit}
.lrow a:hover{border-color:var(--crimson)}
.lrow .ln{font:800 26px/1 var(--display);color:var(--crimson)}
.lrow b{display:block}
.lrow small{display:block;color:var(--muted);font-size:14.5px;margin-top:2px}
@media (max-width:640px){.lrow a{grid-template-columns:32px 1fr}.lrow .tag{grid-column:2;justify-self:start}}
.field{display:grid;gap:6px;margin:0 0 14px}
.field span{font-size:14px;font-weight:600;color:var(--muted)}
.field input,.field select,.field textarea,.play-ctl select{font:inherit;font-size:16px;color:var(--bone);background:var(--bg);border:1px solid var(--line2);border-radius:9px;padding:11px 12px;width:100%}
.play-ctl select{width:auto;padding:7px 10px;font-size:14.5px}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--crimson);outline:none;box-shadow:0 0 0 3px var(--crimson-dim)}
.check{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--muted);margin:6px 0 14px;cursor:pointer}
.check input{accent-color:var(--crimson);width:18px;height:18px;flex:0 0 auto;margin-top:3px}
.auth-form .btn{margin-top:4px}
.seg2[role=tablist]{margin-bottom:18px}
.linkish{background:none;border:0;padding:0;color:var(--crimson-hi);font:inherit;cursor:pointer;text-decoration:underline}
.btn.danger{box-shadow:inset 0 0 0 1px rgba(255,122,107,.6);color:#ffb2a8}
.acct{margin-top:16px}
.acct h2{font-size:32px}
.big-line{font-size:20px;font-weight:600}
.play-ctl{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center;margin:8px 0 12px}
.play-ctl input[type=range]{accent-color:var(--crimson);vertical-align:middle;width:140px}
.play-ctl input[type=checkbox]{accent-color:var(--crimson);vertical-align:middle}
.rhy{display:grid;gap:12px}
.rhy-pat{display:flex;gap:4px;height:44px}
.rhy-pat i{border-radius:7px;background:var(--crimson-dim);border:1px solid #6a2430;display:grid;place-items:center;color:var(--steel);font-style:normal;transition:background .08s}
.rhy-pat i.rest{background:transparent;border-style:dashed;border-color:var(--line2)}
.rhy-pat i.acc{border-color:var(--crimson);border-width:2px}
.rhy-pat i.now{background:var(--crimson)}
.rhy-ctl{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:center}
.rhy-ctl input[type=range]{accent-color:var(--crimson);vertical-align:middle}
.rhy-tap{height:96px;border-radius:16px;border:2px solid var(--crimson);background:var(--s2);color:var(--crimson-hi);font:900 34px var(--display);letter-spacing:.1em;cursor:pointer;touch-action:manipulation;user-select:none}
.rhy-tap:disabled{opacity:.35;cursor:default}
.rhy-tap.hit{background:var(--crimson);color:var(--on-crimson)}
.ltable-wrap{overflow-x:auto}
.ltable{border-collapse:collapse;width:100%;font-size:15.5px;margin:6px 0 10px}
.ltable th,.ltable td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.ltable th{background:var(--s2);color:var(--muted);font-weight:700}
.review-note{font-size:14px;color:var(--warn);border:1px solid var(--warn-line);background:var(--warn-dim);border-radius:10px;padding:9px 14px;margin:14px 0 0}
.locked-card{text-align:center}
.locked-card .big{font-size:48px}
.goals{margin-top:14px;color:var(--muted)}
.goals summary{cursor:pointer;font-weight:600;color:var(--bone)}
.dash-h{margin-top:46px;font-size:40px}
.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:28px;align-items:start}
.tool-grid .card{border-bottom:1px solid var(--line)}
.tool-grid .wide{grid-column:1/-1}
@media (max-width:860px){.tool-grid{grid-template-columns:1fr}}
.hist{display:flex;gap:3px;align-items:flex-end;height:120px;margin-top:14px;border-bottom:1px solid var(--line2)}
.hb{flex:1;height:100%;display:flex;align-items:flex-end;position:relative;outline-offset:2px}
.hb i{display:block;width:100%;background:var(--crimson);border-radius:4px 4px 0 0;min-height:0}
.hb:hover i,.hb:focus i{background:var(--crimson-hi)}
.hb:hover::after,.hb:focus::after{content:attr(data-tip);position:absolute;bottom:calc(100% + 6px);left:50%;translate:-50% 0;background:var(--bone);color:var(--bg);font-size:12.5px;font-weight:600;padding:4px 8px;border-radius:6px;white-space:nowrap;z-index:5}
.hist-axis{display:flex;justify-content:space-between;font-size:12.5px;color:var(--steel);margin-top:6px}
.hbars{display:grid;gap:8px;margin-top:8px}
.hbar{display:grid;grid-template-columns:minmax(120px,40%) 1fr 48px;gap:10px;align-items:center;font-size:14px}
.hbar .hl{color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hbar .ht{height:10px;background:var(--line);border-radius:5px;overflow:hidden}
.hbar .ht i{display:block;height:100%;background:var(--crimson);border-radius:0 4px 4px 0}
.hbar b{text-align:right;font-variant-numeric:tabular-nums}
.legal h2{font-size:30px}
.prose a:not(.btn){color:var(--crimson-hi)}

/* Small phones: the treble map switches to a vertical layout (rows become columns, button 1 at the top). */
@container (max-width:430px){
  .acc-main{--size:44px}
  .acc-treble{min-width:0;grid-template-columns:auto repeat(3,auto);grid-auto-flow:column;justify-content:center;gap:10px;padding:10px}
  .acc-bellows{writing-mode:vertical-rl;height:auto;width:22px;margin:0;grid-row:1}
  .acc-row{grid-template-columns:1fr;grid-template-rows:auto 1fr;align-items:start;justify-items:center;gap:6px}
  .acc-rowlabel{text-align:center}
  .acc-rowlabel b{font-size:10px;max-width:64px}
  .acc-keys{flex-direction:column;gap:6px}
  .acc-row-inner .acc-keys,.acc-row-outer .acc-keys{padding-left:0;padding-top:calc(var(--size) * .55)}
  .acc-bassrow{flex-wrap:wrap}
}
/* Larger touch targets for checkboxes (labels also enlarge the hit area). */
input[type=checkbox]{width:20px;height:20px;accent-color:var(--crimson)}

.cur-h,.plan-h{font:700 19px/1.25 var(--body);font-stretch:105%;margin:0 0 8px;text-transform:none}
.plan-h{font-size:21px}
.related{margin-top:36px;border-top:1px solid var(--line);padding-top:8px}
.related ul{padding-left:20px}
.related li{margin:6px 0}

/* ---------- Brand lockup and primary CTA (crimson identity) ---------- */
.brand img{width:40px;height:40px;flex:0 0 auto;display:block}
.brand picture{display:block;flex:0 0 auto}
.btn.cta{text-transform:uppercase;letter-spacing:.06em;font-stretch:112%}
.dash-brand{display:flex;align-items:center;gap:14px;margin-bottom:6px}
.dash-brand img{width:56px;height:56px}
/* Spanish headlines carry Ó/Ñ accents: a touch more line-height so marks never touch the line above. */
h1:lang(es){line-height:.92}
@media (max-width:540px){
  h1{font-size:clamp(40px,11.5vw,54px)}
  .btn.cta{white-space:normal;text-align:center;line-height:1.25}
  .top .wrap{gap:10px}
  .brand{gap:8px}
  .brand img{width:34px;height:34px}
  .brand span{font-size:17px}
  .lang a{padding:7px 8px}
}
@media (max-width:360px){.brand span{font-size:15px}}
/* Very narrow phones (≤ 380 px): the name gets its own row so the language switch never covers it. */
@media (max-width:380px){
  .top .wrap{flex-wrap:wrap;height:auto;padding-top:10px;padding-bottom:10px;row-gap:8px}
  .brand{flex:1 1 100%}
  .lang{margin-left:0}
  .nav-acct{margin-left:auto}
}
/* "From Zero" in the name: true crimson only at WCAG "large text" sizes (≥ 18.66px bold).
   Between 381 and 540 px the name is 17px, so it uses the accessible crimson tint (5.5:1). */
@media (max-width:540px){.brand em{color:var(--crimson-hi)}}
@media (max-width:380px){.brand span{font-size:20px}.brand em{color:var(--crimson)}}