/* Karma Tune — páginas de afinador por instrumento.
   Escenario negro por defecto (como la app); claro con carriles neón. El dorado Karma es el premio. */
:root{
  --bg:#000; --bg2:#0d0d0f; --card:#141416; --ink:#f5f5f7; --muted:#9a9aa0; --line:rgba(255,255,255,.10);
  --gold:#c9a45c; --ok:#f0d39a; --okfill:linear-gradient(160deg,#f6dda3,#c9a45c 55%,#9c7a35);
  --lane0:#ff375f; --lane1:#ff9f0a; --lane2:#30d158; --lane3:#40c8e0; --lane4:#5e5ce6; --lane5:#bf5af2; --lanetext:#000;
  --hub0:#1c1a17; --hub1:#050505;
  --ui:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Helvetica Neue",system-ui,sans-serif;
  color-scheme:dark;
}
html[data-theme="light"]{
  --bg:#f5f5f7; --bg2:#ffffff; --card:#ffffff; --ink:#1d1d1f; --muted:#6e6e73; --line:rgba(0,0,0,.10);
  --gold:#a8822f; --ok:#b8892c;
  --lane0:#ff0a54; --lane1:#ff6a00; --lane2:#00d84a; --lane3:#00b8ff; --lane4:#3b3bff; --lane5:#b000ff; --lanetext:#fff;
  --hub0:#fff; --hub1:#f1f1f4; color-scheme:light;
}
.ln0{--ln:var(--lane0)} .ln1{--ln:var(--lane1)} .ln2{--ln:var(--lane2)} .ln3{--ln:var(--lane3)} .ln4{--ln:var(--lane4)} .ln5{--ln:var(--lane5)}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.55 var(--ui);-webkit-font-smoothing:antialiased}
a{color:var(--gold)}
img,video{max-width:100%}
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.wrap{max-width:1080px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.narrow{max-width:720px}

/* encabezado */
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:12px;height:56px}
.brand{display:flex;align-items:baseline;gap:8px;color:var(--ink);text-decoration:none}
.brand svg{height:17px;width:auto;color:var(--ink)}
.brand span{font:700 11px var(--ui);letter-spacing:.42em;color:var(--gold)}
.top nav{margin-left:auto;display:flex;gap:6px;align-items:center}
.top nav a{color:var(--muted);text-decoration:none;font:600 14px var(--ui);padding:8px 10px;border-radius:999px}
.top nav a:hover{color:var(--ink)}
.top .cta{background:var(--gold);color:#120c02!important;padding:8px 14px}
@media (max-width:560px){ .top nav a:not(.cta){display:none} }

/* portada con el afinador */
.hero{padding-block:22px 10px;display:grid;grid-template-columns:1fr;gap:18px}
.hero h1{margin:0;font:800 clamp(30px,6vw,52px)/1.05 var(--ui);letter-spacing:-.025em;text-wrap:balance}
.hero p.lead{margin:6px 0 0;color:var(--muted);font-size:clamp(16px,2.2vw,19px);max-width:56ch}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.badges span{font:600 12px var(--ui);color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:5px 10px}
@media (min-width:960px){ .hero{grid-template-columns:minmax(0,1fr) 500px;align-items:start;padding-top:40px} .hero .intro{position:sticky;top:90px} }

/* afinador */
#ktw{position:relative;max-width:500px;width:100%;margin:0 auto;height:min(780px,calc(100svh - 70px));min-height:600px}
.ktw{height:100%;display:flex;flex-direction:column;background:radial-gradient(70% 45% at 50% 30%,color-mix(in srgb,var(--ktwWash,#888) var(--washA,0%),transparent),transparent 75%),var(--bg2);
  border:1px solid var(--line);border-radius:28px;padding:14px 14px 0;overflow:hidden;position:relative}
#ktw[data-st] .ktw{--washA:22%}
.ktw-top{display:flex;align-items:center;gap:8px}
.ktw-sel select{appearance:none;-webkit-appearance:none;border:1px solid var(--line);background:color-mix(in srgb,var(--ink) 7%,transparent);color:var(--ink);font:600 15px var(--ui);border-radius:999px;padding:8px 32px 8px 14px;
  background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 17px) 52%,calc(100% - 12px) 52%;background-size:5px 5px;background-repeat:no-repeat}
.ktw-lbl{font:600 14px var(--ui);color:var(--muted)}
.ktw-timer{margin-left:auto;display:flex;align-items:center;gap:6px;font:600 14px var(--ui);color:var(--muted);font-variant-numeric:tabular-nums}
.ktw-timer i{width:8px;height:8px;border-radius:50%;background:var(--muted)}
.ktw-timer.run i{background:#ff375f;animation:ktwb 1s infinite}
@keyframes ktwb{50%{opacity:.25}}
.ktw-chips{display:flex;justify-content:center;align-items:flex-end;gap:6px;margin-top:12px;min-height:40px}
.ktw-col{display:flex;flex-direction:column-reverse;gap:4px;flex:0 1 40px;max-width:40px}
.ktw-chip{width:100%;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;gap:1px;line-height:1;padding:0 2px;letter-spacing:-.01em;white-space:nowrap;position:relative;font:700 16px var(--ui);color:var(--ln);
  background:color-mix(in srgb,var(--ln) 15%,transparent);box-shadow:inset 0 0 0 1.5px color-mix(in srgb,var(--ln) 55%,transparent);transition:transform .25s,background .25s}
.ktw-chip sub{font-size:.62em;font-weight:700;opacity:.75;position:relative;top:.32em;line-height:1;vertical-align:baseline}
.ktw-col.pair .ktw-chip{height:32px;font-size:14px;border-radius:10px}

.ktw-chip.cur{background:var(--ln);color:var(--lanetext);box-shadow:0 0 0 3px var(--bg2),0 0 0 5px var(--ln),0 0 22px var(--ln);transform:translateY(-3px) scale(1.08)}
.ktw-chip.done{background:var(--okfill);color:#1a1206;box-shadow:0 6px 16px rgba(201,164,92,.45)}
.ktw-chip.done::after{content:"✓";position:absolute;right:-5px;top:-6px;width:17px;height:17px;border-radius:50%;background:var(--ink);color:var(--bg);font:800 10px/17px var(--ui);text-align:center}
.ktw-chip.pop{animation:ktwpop .5s cubic-bezier(.2,1.6,.4,1)}
@keyframes ktwpop{0%{transform:scale(.55)}}
.ktw-combo{text-align:center;font:600 12px var(--ui);color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-top:6px;min-height:16px}
.ktw-combo b{color:var(--ok)}
.ktw-stage{position:relative;display:flex;justify-content:center;padding-top:58px;flex:none}
.ktw-gauge{position:absolute;left:-14px;right:-14px;top:0;bottom:0;width:calc(100% + 28px);height:100%;pointer-events:none}
.ktw-ring{--p:0;width:138px;aspect-ratio:1;border-radius:50%;display:grid;place-items:center;position:relative;
  background:conic-gradient(var(--ok) calc(var(--p)*1turn),color-mix(in srgb,var(--ln,#8e8e93) 30%,transparent) 0)}
html[data-theme="light"] .ktw-ring{background:conic-gradient(var(--ok) calc(var(--p)*1turn),color-mix(in srgb,var(--ln,#8e8e93) 55%,transparent) 0)}
.ktw-ring::before{content:"";position:absolute;inset:6px;border-radius:50%;background:radial-gradient(circle at 50% 35%,var(--hub0),var(--hub1) 70%)}
html[data-theme="light"] .ktw-ring::before{box-shadow:0 8px 26px color-mix(in srgb,var(--ln,#000) 30%,transparent)}
.ktw-ring.thump{animation:ktwth .45s cubic-bezier(.2,1.6,.4,1)}
@keyframes ktwth{0%{transform:scale(1.16)}}
.ktw-go{position:relative;border:0;background:transparent;color:var(--ink);display:flex;flex-direction:column;align-items:center;gap:4px;cursor:pointer;font:700 13px var(--ui)}
.ktw-go svg{width:34px;height:34px;color:var(--gold)}
.ktw-go.on svg{animation:ktwb 1.4s infinite}
.ktw-note{position:relative;font:800 72px/1 var(--ui);letter-spacing:-.03em;display:flex;align-items:flex-start;font-variant-numeric:tabular-nums}
.ktw-note sub{font-size:.34em;font-weight:600;color:var(--muted);align-self:flex-end;margin:0 0 .16em .04em}
.ktw-state{text-align:center;font:800 22px var(--ui);text-transform:uppercase;min-height:30px;margin-top:8px}
.ktw-state.big{animation:ktwbig .6s cubic-bezier(.2,1.6,.4,1)}
@keyframes ktwbig{0%{transform:scale(1.6);opacity:0}}
#ktw:is([data-st="flat"],[data-st="sharp"],[data-st="near"]) .ktw-state{color:var(--ln,var(--ink))}
#ktw[data-st="ok"] .ktw-state,#ktw[data-st="ok"] .ktw-note{color:var(--ok)}
.ktw-hint{text-align:center;color:var(--muted);font:500 14px var(--ui);min-height:20px}
.ktw-head{flex:1;min-height:0;display:flex;justify-content:center;align-items:flex-end;margin-top:6px}
.ktw-head svg{height:100%;width:100%;display:block;overflow:visible}
.ktw-head .str{stroke:rgba(235,230,220,.38)}
html[data-theme="light"] .ktw-head .str{stroke:rgba(70,60,50,.4)}
.ktw-head .str.on{stroke:var(--ln);stroke-width:12px;filter:drop-shadow(0 0 8px var(--ln)) drop-shadow(0 0 18px var(--ln))}
.ktw-head .str.ok{stroke:var(--ok);filter:drop-shadow(0 0 6px var(--ok))}
.ktw-head .nut{fill:#ece6d8}
.ktw-head .peg{cursor:pointer;outline:none}
.ktw-head .peg .arr{display:none}
.ktw-head .lab{fill:var(--card);stroke:color-mix(in srgb,var(--ln) 60%,transparent);transition:fill .2s}
.ktw-head .pl{fill:var(--ink);font-weight:700;font-family:var(--ui)}
.ktw-head .po{fill:var(--muted)}
.ktw-head .peg.on .lab{fill:var(--ln);stroke:var(--ln);animation:ktwp 1.1s ease-in-out infinite}
.ktw-head .peg.on .pl,.ktw-head .peg.on .po{fill:var(--lanetext)}
.ktw-head .peg.on .arr{fill:var(--ln);font-weight:900}
.ktw-head .peg.ok .lab{fill:#d9b56c;stroke:#f6dda3}
.ktw-head .peg.ok .pl{fill:#1a1206}
.ktw-head .peg:hover .lab,.ktw-head .peg:focus-visible .lab{stroke:var(--ln);stroke-width:8}
@keyframes ktwp{50%{filter:drop-shadow(0 0 16px var(--ln))}}
.ktw-win{position:absolute;inset:0;z-index:5;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:24px;
  background:radial-gradient(60% 45% at 50% 40%,rgba(201,164,92,.3),color-mix(in srgb,var(--bg2) 94%,transparent) 70%);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.ktw-win b{font:800 28px/1.1 var(--ui);text-wrap:balance}
.ktw-stars{font-size:40px;letter-spacing:.12em;color:var(--ok)}
.ktw-time{font:800 56px/1 var(--ui);color:var(--ok);font-variant-numeric:tabular-nums}
.ktw-win p{margin:0;color:var(--muted);font-size:15px;max-width:34ch}
.ktw-row{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:6px}
.ktw-btn{border:0;border-radius:14px;padding:12px 16px;font:700 15px var(--ui);background:color-mix(in srgb,var(--ink) 10%,transparent);color:var(--ink);text-decoration:none;cursor:pointer}
.ktw-btn.pri{background:var(--gold);color:#120c02}
.ktw-px{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:50}
.ktw-flash{position:fixed;inset:0;pointer-events:none;z-index:49;opacity:0;background:radial-gradient(circle at 50% 35%,rgba(255,226,160,.45),transparent 60%)}
.ktw-flash.on{animation:ktwfl .55s ease-out}
@keyframes ktwfl{0%{opacity:1}100%{opacity:0}}

/* contenido */
section{padding-block:34px}
section h2{margin:0 0 14px;font:800 clamp(24px,3.6vw,32px)/1.15 var(--ui);letter-spacing:-.015em;text-wrap:balance}
section h3{margin:22px 0 8px;font:700 19px var(--ui)}
.kicker{font:700 12px var(--ui);letter-spacing:.14em;text-transform:uppercase;color:var(--gold);margin-bottom:6px}
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:var(--card)}
table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
th{font:700 12px var(--ui);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
tr:last-child td{border-bottom:0}
td .dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--ln);margin-right:8px;vertical-align:1px}
.tunings{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tunings span{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:8px 12px;font-size:15px}
.tunings b{display:block;font-size:13px;color:var(--muted);font-weight:600}
ol.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:14px}
ol.steps li{counter-increment:s;display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:start}
ol.steps li::before{content:counter(s);width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:color-mix(in srgb,var(--gold) 18%,transparent);color:var(--gold);font:800 15px var(--ui)}
ol.steps b{display:block}
ol.steps span{color:var(--muted)}
ul.tips{padding-left:20px;margin:0;display:grid;gap:8px}
ul.tips li::marker{color:var(--gold)}
.vid{border-radius:20px;overflow:hidden;background:#000;border:1px solid var(--line);max-width:420px}
.vid video{display:block;width:100%}
.two{display:grid;gap:28px}
@media (min-width:860px){ .two{grid-template-columns:1fr 1fr;align-items:start} }
.cta-app{background:radial-gradient(80% 120% at 0% 0%,rgba(201,164,92,.22),transparent 60%),var(--card);border:1px solid var(--line);border-radius:28px;padding:26px;display:grid;gap:16px}
@media (min-width:860px){ .cta-app{grid-template-columns:1.1fr 1fr;align-items:center;padding:36px} }
.cta-app h2{margin:0}
.cta-app p{margin:0;color:var(--muted)}
.cta-app ul{margin:0;padding-left:20px;color:var(--muted)}
.lead-form{display:grid;gap:10px}
.lead-form input[type=email],.lead-form input[type=text]{width:100%;border:1px solid var(--line);border-radius:14px;background:var(--bg);color:var(--ink);font:400 17px var(--ui);padding:14px}
.lead-form input:focus{outline:2px solid var(--gold);outline-offset:1px}
.lead-form label.chk{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted)}
.lead-form label.chk input{width:18px;height:18px;accent-color:var(--gold);margin:2px 0 0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:14px;padding:14px 18px;font:700 16px var(--ui);background:var(--gold);color:#120c02;text-decoration:none;cursor:pointer}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.stores{display:flex;gap:8px;flex-wrap:wrap}
.stores span{font:600 13px var(--ui);color:var(--muted);border:1px solid var(--line);border-radius:12px;padding:9px 12px}
.ok-msg{color:var(--ok);font-weight:700}
.shop{display:grid;gap:14px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:24px;padding:22px}
@media (min-width:760px){ .shop{grid-template-columns:1fr auto} }
.shop p{margin:4px 0 0;color:var(--muted)}
details{border-bottom:1px solid var(--line);padding:14px 0}
summary{cursor:pointer;font:700 17px var(--ui);list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::after{content:"+";color:var(--gold);font-weight:800}
details[open] summary::after{content:"−"}
details p{margin:8px 0 0;color:var(--muted)}
.grid-inst{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.grid-inst a{position:relative;display:block;aspect-ratio:1.25;border-radius:16px;overflow:hidden;background:#111;color:#fff;text-decoration:none;border:1px solid var(--line)}
.grid-inst img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.grid-inst a::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 40%,rgba(0,0,0,.85))}
.grid-inst span{position:absolute;left:12px;bottom:10px;z-index:1;font:700 15px/1.2 var(--ui)}
.grid-inst small{display:block;font-weight:500;font-size:12px;opacity:.75}
.grid-inst a:hover{outline:2px solid var(--gold)}
footer{border-top:1px solid var(--line);padding-block:28px 40px;color:var(--muted);font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between}
footer a{color:var(--muted)}
.prose p{margin:0 0 12px}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}