/* Layout: plain app-style pages — grey canvas, white rounded cards, one orange accent, Pretendard throughout. */
:root{
  --bg:#f2f4f6; --panel:#ffffff; --panel2:#f2f4f6; --line:#e5e8eb;
  --fg:#191f28; --sub:#4e5968; --muted:#8b95a1;
  --brass:#ff6a2b; --brass-soft:#fff1ea; --brass-ink:#ffffff;
  --good:#10b07c; --good-soft:#e6f8f1; --warn:#f04452;
  --screen:#ffffff; --screen-fg:#191f28; --screen-muted:#8b95a1; --screen-line:#e5e8eb;
  --screen-good:#10b07c; --screen-accent:#ff6a2b; --screen-warn:#f04452;
  --f-display:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,system-ui,"Apple SD Gothic Neo","Noto Sans KR","Malgun Gothic",sans-serif;
  --f-body:var(--f-display); --f-mono:var(--f-display);
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#17171c; --panel:#212128; --panel2:#2b2b33; --line:#34343d;
  --fg:#eeeef2; --sub:#c3c3cc; --muted:#8f8f9a;
  --brass:#ff7d45; --brass-soft:#3a271f; --brass-ink:#ffffff;
  --good:#2fd39a; --good-soft:#18342a; --warn:#ff6170;
  --screen:#212128; --screen-fg:#eeeef2; --screen-muted:#8f8f9a; --screen-line:#34343d;
  --screen-good:#2fd39a; --screen-accent:#ff7d45; --screen-warn:#ff6170; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#17171c; --panel:#212128; --panel2:#2b2b33; --line:#34343d;
  --fg:#eeeef2; --sub:#c3c3cc; --muted:#8f8f9a;
  --brass:#ff7d45; --brass-soft:#3a271f; --brass-ink:#ffffff;
  --good:#2fd39a; --good-soft:#18342a; --warn:#ff6170;
  --screen:#212128; --screen-fg:#eeeef2; --screen-muted:#8f8f9a; --screen-line:#34343d;
  --screen-good:#2fd39a; --screen-accent:#ff7d45; --screen-warn:#ff6170; color-scheme:dark}

*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 var(--f-body);font-variant-numeric:tabular-nums;letter-spacing:-.01em;-webkit-font-smoothing:antialiased}
a{color:var(--brass);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:3px solid color-mix(in srgb,var(--brass) 45%,transparent);outline-offset:2px}
.wrap{max-width:1080px;margin:0 auto;padding-inline:20px}
.label{font-size:14px;font-weight:700;color:var(--sub);margin:0 0 10px}
.staff,.refstrip{display:none}

/* header */
.site-head{background:var(--panel);position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;gap:16px;min-height:60px;flex-wrap:wrap;padding-block:6px}
.brand{display:flex;align-items:center;gap:8px;color:var(--fg)}
.brand:hover{text-decoration:none}
.brand img{width:28px;height:28px;border-radius:8px}
.brand b{font-size:19px;font-weight:800;letter-spacing:-.03em}
.brand b span{color:var(--brass)}
.nav{display:flex;gap:4px;flex-wrap:wrap;margin-left:auto}
.nav a{color:var(--sub);font-size:15px;font-weight:600;padding:8px 12px;border-radius:10px}
.nav a:hover{background:var(--panel2);text-decoration:none}
.nav a[aria-current]{color:var(--fg);background:var(--panel2)}
.nav a.sub{color:var(--brass)}

/* page head */
.crumbs{font-size:14px;color:var(--muted);padding-top:20px}
.crumbs a{color:var(--muted)}
.hero{padding-block:24px 4px;max-width:720px}
.hero h1{font-size:clamp(30px,4.6vw,44px);line-height:1.2;font-weight:800;letter-spacing:-.035em;margin:0;text-wrap:balance}
.hero p{color:var(--sub);margin:10px 0 0;max-width:56ch;font-size:17px}

/* home */
.home-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,600px);gap:28px;align-items:start;padding-top:8px}
.home-grid .tool{margin:0}
.home-side{display:flex;flex-direction:column;gap:20px;min-width:0}
@media (max-width:900px){.home-grid{grid-template-columns:1fr;gap:16px}.home-grid .tool{order:-1}}

/* card */
.tool{background:var(--panel);border-radius:24px;padding:20px;margin-block:20px;max-width:620px;display:flex;flex-direction:column;gap:14px}
.tool-head{display:none}

select,input,button{font:inherit;color:var(--fg)}
select,input[type=text],input:not([type]){background:var(--panel2);border:0;border-radius:12px;padding:11px 14px;min-width:0;font-weight:600}
select{appearance:none;-webkit-appearance:none;padding-right:36px;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 13px) 50%;background-size:5px 5px;background-repeat:no-repeat}
.btn{border:0;background:var(--panel2);border-radius:14px;padding:14px 18px;cursor:pointer;font-size:16px;font-weight:700;color:var(--sub)}
.btn:hover{filter:brightness(.97)}
.btn.primary{background:var(--brass);color:var(--brass-ink);flex:1}
.btn.primary.on{background:var(--fg);color:var(--panel)}
.btn.sm{padding:8px 12px;font-size:14px;border-radius:10px}
.btn:disabled{opacity:.4;cursor:not-allowed}

/* tuner */
.tw-top{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.tw-top select{flex:1 1 150px}
.seg{display:flex;background:var(--panel2);border-radius:12px;padding:4px}
.seg button{border:0;background:transparent;padding:7px 14px;font-size:14px;font-weight:700;border-radius:9px;cursor:pointer;color:var(--muted)}
.seg button.on{background:var(--panel);color:var(--fg);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.level{width:56px;height:6px;border-radius:3px;background:var(--panel2);overflow:hidden}
.level span{display:block;height:100%;width:0;background:var(--good);transition:width .08s}

.tw-face{position:relative;display:grid;grid-template-columns:56px 1fr;grid-template-areas:"ladder main" "meter meter" "dir dir";gap:10px 12px;
  background:var(--panel2);color:var(--screen-fg);border-radius:20px;padding:20px 18px;transition:background .25s}
.tw-face.intune{background:var(--good-soft)}
.ladder{grid-area:ladder;list-style:none;margin:0;padding:0;display:flex;flex-direction:column;justify-content:center;gap:4px;font-size:13px;font-weight:600;color:var(--screen-muted);text-align:center}
.ladder li{opacity:.55}
.ladder li.cur{opacity:1;color:var(--fg);background:var(--panel);border-radius:8px;padding:3px 0;font-weight:800}
.tw-main{grid-area:main;display:flex;flex-direction:column;align-items:center;min-width:0}
.tw-status{font-size:15px;font-weight:700;color:var(--sub);min-height:22px;text-align:center}
.tw-status.ok{color:var(--good)}
.tw-note{font-size:clamp(96px,22vw,132px);line-height:1;font-weight:800;letter-spacing:-.05em;display:flex;align-items:flex-start;transition:color .2s}
.tw-note sup{font-size:.36em;margin-top:.1em;color:var(--brass)}
.tw-note sub{font-size:.28em;font-weight:700;align-self:flex-end;margin-bottom:.12em;color:var(--muted);letter-spacing:0}
.intune .tw-note{color:var(--good)}
.idle .tw-note,.idle .tw-read{opacity:.25}
.tw-read{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;font-size:14px;color:var(--muted)}
.tw-read b{color:var(--fg);font-weight:700}
.tw-meter{grid-area:meter;padding-top:4px}
.bar{position:relative;height:14px;border-radius:7px;background:var(--panel)}
.bar .zone{position:absolute;top:0;bottom:0;border-radius:7px;background:color-mix(in srgb,var(--good) 30%,transparent)}
.bar .mid{position:absolute;left:50%;top:-6px;bottom:-6px;width:2px;border-radius:1px;background:var(--muted);transform:translateX(-1px);opacity:.6}
.bar .needle{position:absolute;top:50%;width:26px;height:26px;border-radius:50%;background:var(--brass);left:50%;transform:translate(-13px,-13px);transition:left .08s linear,background .2s;box-shadow:0 2px 8px rgba(0,0,0,.18);border:4px solid var(--panel)}
.bar .needle.ok{background:var(--good)} .bar .needle.far{background:var(--warn)}
.idle .bar .needle{background:var(--line);box-shadow:none}
.scale{display:flex;justify-content:space-between;font-size:12px;font-weight:600;color:var(--muted);margin-top:10px}
.tw-strobe{grid-area:meter;width:100%;height:auto;aspect-ratio:900/120;border-radius:12px;background:var(--panel)}
.tw-dir{grid-area:dir;display:flex;justify-content:space-between;font-size:13px;color:var(--muted)}
.tw-strings{display:flex;gap:6px;justify-content:center}
.str{flex:1 1 0;min-width:0;max-width:76px;border:0;background:var(--panel2);border-radius:14px;padding:9px 10px;font-size:17px;font-weight:800;cursor:pointer;line-height:1.1}
.str small{display:block;font-size:11px;color:var(--muted);font-weight:600;margin-top:2px}
.str.target{background:var(--brass-soft);color:var(--brass)}
.str.locked{background:var(--fg);color:var(--panel)}
.str.locked small{color:var(--panel)}
.str.done{box-shadow:inset 0 0 0 2px var(--good)}
.tw-lock{margin:0;text-align:center;font-size:13px;color:var(--muted)}
.tw-ctl{display:flex;gap:8px;flex-wrap:wrap}
.tw-err{margin:0;background:color-mix(in srgb,var(--warn) 10%,var(--panel));color:var(--warn);border-radius:14px;padding:12px 14px;font-size:14px;font-weight:600}
.tw-set summary{cursor:pointer;color:var(--muted);font-size:14px;font-weight:600}
.tw-set .grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:12px}
.tw-set .grid>div{display:flex;flex-direction:column;gap:6px;min-width:0}
.tw-set label{font-size:13px;font-weight:700;color:var(--sub)}
.step{display:flex;align-items:center;justify-content:space-between;gap:6px;background:var(--panel2);border-radius:12px;padding:4px;font-weight:700}
.step button{width:36px;height:36px;border-radius:10px;border:0;background:var(--panel);cursor:pointer;font-size:18px}
input[type=range]{width:100%;accent-color:var(--brass)}

/* singing bowl */
.bw-face{position:relative;display:grid;place-items:center;aspect-ratio:1/1;max-width:320px;width:100%;margin:0 auto;border-radius:50%;background:var(--panel2);transition:background .3s}
.bw-ring{position:absolute;inset:0}
.bw-ring i{position:absolute;inset:4%;border-radius:50%;border:2px solid var(--brass);opacity:0}
.bw-face:not(.idle) .bw-ring i{animation:ripple 2.4s ease-out infinite}
.bw-ring i:nth-child(2){animation-delay:.8s!important}.bw-ring i:nth-child(3){animation-delay:1.6s!important}
.bw-face::before{content:"";position:absolute;inset:13%;border-radius:50%;background:var(--panel);box-shadow:0 6px 24px rgba(0,0,0,.08)}
.bw-face.locked{background:var(--good-soft)}
@keyframes ripple{0%{transform:scale(.8);opacity:.7}100%{transform:scale(1.02);opacity:0}}
.bw-center{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;text-align:center;padding:0 20%}
.bw-center .tw-status{font-size:13px}
.bw-center .tw-note{font-size:clamp(76px,20vw,100px)}
.bw-face.locked .tw-note{color:var(--good)}
.bw-hz{font-size:14px;color:var(--muted)}
.bw-hz b{color:var(--fg);font-size:20px;font-weight:800}
.bw-chakra{font-size:12px;font-weight:600;color:var(--brass);min-height:18px}
.idle .bw-center{opacity:.6}
.bw-compare{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.cmp{background:var(--panel2);border-radius:16px;padding:14px;display:flex;flex-direction:column;gap:6px;min-width:0}
.cmp .k{font-size:13px;font-weight:600;color:var(--muted)}
.cmp b{font-size:18px;font-weight:800}
.cmp.closer{background:var(--brass-soft)}
.cmp.closer .k{color:var(--brass)}
.mini{position:relative;height:6px;border-radius:3px;background:var(--panel)}
.mini::after{content:"";position:absolute;left:50%;top:-3px;bottom:-3px;width:2px;background:var(--muted);opacity:.5}
.mini i{position:absolute;top:50%;width:12px;height:12px;margin:-6px 0 0 -6px;border-radius:50%;background:var(--brass);left:50%;transition:left .1s}
.mini i.ok{background:var(--good)}
.bw-verdict{margin:0;padding:14px;border-radius:16px;background:var(--panel2);font-weight:800;font-size:16px;text-align:center;color:var(--sub)}
.bw-verdict.ok{background:var(--good-soft);color:var(--good)}
.bw-verdict.near{background:var(--brass-soft);color:var(--brass)}
.bw-verdict.no{background:color-mix(in srgb,var(--warn) 10%,var(--panel));color:var(--warn)}
.bw-stable{display:flex;align-items:center;gap:10px;font-size:13px;font-weight:600;color:var(--muted)}
.stab{flex:1;height:6px;border-radius:3px;background:var(--panel2);overflow:hidden}
.stab i{display:block;height:100%;width:0;background:var(--good);transition:width .15s}
.bw-save{display:flex;gap:8px}
.bw-save input{flex:1}
.bw-listhead{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.bw-listhead h3{margin:0;font-size:17px;font-weight:800}
.tablewrap{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{text-align:left;padding:12px 14px 12px 0;border-bottom:1px solid var(--line);white-space:nowrap}
th{color:var(--muted);font-size:13px;font-weight:700}
td.empty{white-space:normal;color:var(--muted)}
.x{border:0;background:none;color:var(--muted);cursor:pointer;font-size:20px}
.fine{font-size:13px;color:var(--muted);margin:6px 0 0;white-space:pre-wrap}

/* metronome & pipe */
.mt-face{display:flex;flex-direction:column;align-items:center;gap:12px;background:var(--panel2);border-radius:20px;padding:24px 16px}
.mt-dots{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.mt-dots i{width:16px;height:16px;border-radius:50%;background:var(--line);transition:background .05s,transform .05s}
.mt-dots i.acc{box-shadow:0 0 0 2px var(--brass)}
.mt-dots i.on{background:var(--brass);transform:scale(1.25)}
.mt-bpm{display:flex;align-items:center;gap:18px}
.mt-bpm output{font-size:clamp(80px,20vw,112px);line-height:1;font-weight:800;letter-spacing:-.05em;min-width:3ch;text-align:center}
.round{width:52px;height:52px;border-radius:50%;border:0;background:var(--panel);font-size:24px;font-weight:700;cursor:pointer}
.mt-unit{color:var(--muted);font-size:14px;font-weight:700}
.pp-keys{display:grid;grid-template-columns:repeat(auto-fill,minmax(68px,1fr));gap:8px}
.pp-key{padding:16px 0;border-radius:16px;border:0;background:var(--panel2);font-size:20px;font-weight:800;cursor:pointer}
.pp-key small{display:block;font-size:12px;color:var(--muted);font-weight:600}
.pp-key.on{background:var(--brass);color:#fff}
.pp-key.on small{color:#fff}
.pp-loop,.pp-a4{font-size:14px;font-weight:600;color:var(--muted);display:flex;align-items:center;gap:6px}

/* content */
.content{padding-block:8px 56px;display:flex;flex-direction:column;gap:16px}
.content>section,.content>article{background:var(--panel);border-radius:24px;padding:24px}
.content h2{font-size:clamp(21px,2.8vw,26px);line-height:1.3;font-weight:800;letter-spacing:-.03em;margin:0 0 14px;text-wrap:balance}
.content h3{font-size:18px;font-weight:800;margin:22px 0 6px}
.prose p,.prose li{color:var(--sub)}
.prose>p,.prose>ul,.prose>ol{max-width:68ch}
.twocol{display:block}

/* instrument tiles */
.inst-index{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.inst-index a{display:flex;flex-direction:column;gap:2px;padding:14px 16px;background:var(--panel);border-radius:16px;color:var(--fg);font-weight:700;height:100%}
.inst-index a:hover{text-decoration:none;box-shadow:inset 0 0 0 2px var(--brass)}
.inst-index a small{font-size:13px;font-weight:500;color:var(--muted)}
.inst-index a.feature{background:var(--brass-soft)}
.inst-index a.feature small{color:var(--brass)}
.content .inst-index a{background:var(--panel2)}
.content .inst-index a.feature{background:var(--brass-soft)}
.home-side .inst-index{grid-template-columns:repeat(2,minmax(0,1fr))}

ol.steps{padding-left:0;list-style:none;counter-reset:s}
ol.steps li{counter-increment:s;position:relative;padding-left:42px;margin-bottom:14px;min-height:28px}
ol.steps li strong{color:var(--fg)}
ol.steps li::before{content:counter(s);position:absolute;left:0;top:0;font-size:14px;font-weight:800;color:var(--brass);background:var(--brass-soft);border-radius:50%;width:28px;height:28px;display:grid;place-items:center}

.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px;margin:0}
.features div{padding:16px;background:var(--panel2);border-radius:16px}
.features dt{font-size:16px;font-weight:800;margin-bottom:4px}
.features dd{margin:0;color:var(--sub);font-size:15px}

.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq details:last-child{border-bottom:0}
.faq summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";width:9px;height:9px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);margin-top:5px;flex:none;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(-135deg);margin-top:9px}
.faq p{margin:8px 0 0;color:var(--sub)}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:10px}
.cards article{padding:18px;background:var(--panel2);border-radius:16px}
.cards h3{margin:0 0 6px;font-size:17px}
.cards h3 a{color:var(--fg)}
.cards p{margin:0;color:var(--sub);font-size:15px}

.ad-slot{margin:8px auto;max-width:728px;min-height:0}
.app-cta{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.app-cta p{margin:2px 0 0;color:var(--sub);font-size:15px}
.app-cta .btn{background:var(--fg);color:var(--panel)}

.site-foot{padding-block:28px 40px;color:var(--muted);font-size:14px}
.site-foot .wrap{display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between}
.site-foot nav{display:flex;gap:16px;flex-wrap:wrap}
.site-foot a{color:var(--muted)}
@media (max-width:640px){
  .nav{margin-left:-12px;width:calc(100% + 24px);overflow-x:auto;flex-wrap:nowrap;scrollbar-width:none}
  .nav a{white-space:nowrap}
  .tool{padding:16px;border-radius:20px}
  .tw-face{grid-template-columns:44px 1fr;padding:16px 12px}
  .bw-compare{grid-template-columns:1fr}
  .content>section,.content>article{padding:20px;border-radius:20px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}