:root{
  --black:#000000;
  --near-black:#0a0a0c;
  --surface:#131218;
  --surface-2:#1c1a24;
  --violet:#6750A4;
  --violet-light:#B39DFF;
  --violet-glow:rgba(103,80,164,0.28);
  --mint:#4DD9B0;
  --text:#F5F3F7;
  --text-dim:#8B8397;
  --line:rgba(245,243,247,0.08);
  --display:'Space Grotesk',sans-serif;
  --body:'IBM Plex Sans',sans-serif;
  --mono:'IBM Plex Mono',monospace;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{background:var(--black);color:var(--text);font-family:var(--body);line-height:1.65;}
a{color:inherit;text-decoration:none;}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:200;backdrop-filter:blur(16px);background:rgba(0,0,0,0.78);border-bottom:1px solid var(--line);}
nav .inner{max-width:1280px;margin:0 auto;padding:0 28px;height:64px;display:flex;align-items:center;justify-content:space-between;}
.brand{display:flex;align-items:center;gap:9px;font-family:var(--display);font-weight:600;font-size:17px;}
.brand svg{display:block;}
.doc-badge{font-family:var(--mono);font-size:11px;color:var(--mint);background:rgba(77,217,176,0.1);border:1px solid rgba(77,217,176,0.25);padding:3px 10px;border-radius:100px;margin-left:4px;}
.back-link{font-size:13.5px;color:var(--text-dim);display:flex;align-items:center;gap:6px;}
.back-link:hover{color:var(--text);}

/* LANGUAGE SWITCHER */
.lang-switch{position:relative;}
.lang-btn{
  display:flex;align-items:center;gap:6px;
  padding:7px 14px;border-radius:100px;
  background:var(--surface);border:1px solid var(--line);
  font-family:var(--mono);font-size:12.5px;color:var(--text-dim);
  cursor:pointer;transition:all .2s ease;
}
.lang-btn:hover{color:var(--text);border-color:var(--violet-light);}
.lang-btn svg{width:14px;height:14px;}
.lang-menu{
  position:absolute;top:calc(100% + 8px);right:0;
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:6px;min-width:130px;display:none;z-index:300;
  box-shadow:0 8px 24px rgba(0,0,0,0.4);
}
.lang-menu.open{display:block;}
.lang-menu a{
  display:flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:8px;
  font-size:13.5px;color:var(--text-dim);transition:all .15s ease;
}
.lang-menu a:hover{background:var(--surface-2);color:var(--text);}
.lang-menu a.active{color:var(--violet-light);}
.lang-menu a .lang-code{font-family:var(--mono);font-size:11px;opacity:0.6;margin-left:auto;}

/* LAYOUT */
.layout{max-width:1280px;margin:0 auto;padding:104px 28px 100px;display:grid;grid-template-columns:240px 1fr;gap:64px;}
@media(max-width:900px){.layout{grid-template-columns:1fr;padding-top:88px;}}

/* SIDEBAR */
.sidebar{position:sticky;top:96px;align-self:start;max-height:calc(100vh - 120px);overflow-y:auto;}
@media(max-width:900px){.sidebar{position:static;max-height:none;margin-bottom:20px;}}
.sidebar-group{margin-bottom:22px;}
.sidebar-title{font-family:var(--mono);font-size:11px;letter-spacing:0.05em;color:var(--text-dim);text-transform:uppercase;margin-bottom:10px;}
.sidebar a{display:block;font-size:13.5px;color:var(--text-dim);padding:6px 0;border-left:2px solid transparent;padding-left:12px;margin-left:-13px;transition:all .15s ease;}
.sidebar a:hover{color:var(--text);}
.sidebar a.active{color:var(--violet-light);border-left-color:var(--violet-light);}

/* CONTENT */
.content{min-width:0;}
.doc-hero{margin-bottom:56px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;color:var(--mint);background:rgba(77,217,176,0.08);border:1px solid rgba(77,217,176,0.25);padding:5px 13px;border-radius:100px;margin-bottom:20px;}
.doc-hero h1{font-family:var(--display);font-size:clamp(30px,4vw,44px);font-weight:600;letter-spacing:-0.015em;margin-bottom:16px;line-height:1.1;}
.doc-hero p{color:var(--text-dim);font-size:16.5px;max-width:640px;}

section.doc-section{margin-bottom:64px;scroll-margin-top:88px;}
section.doc-section h2{font-family:var(--display);font-size:26px;font-weight:600;margin-bottom:8px;letter-spacing:-0.01em;border-top:1px solid var(--line);padding-top:32px;}
section.doc-section > p.section-lede{color:var(--text-dim);font-size:15px;margin-bottom:28px;}
h3.sub{font-family:var(--display);font-size:18.5px;font-weight:600;margin:32px 0 10px;}
p{font-size:15px;color:#D9D6E0;margin-bottom:14px;}
p.dim{color:var(--text-dim);font-size:14px;}
ul.doc-list{margin:0 0 18px 0;padding-left:0;list-style:none;}
ul.doc-list li{font-size:15px;color:#D9D6E0;padding:8px 0 8px 26px;position:relative;border-bottom:1px solid var(--line);}
ul.doc-list li:last-child{border-bottom:none;}
ul.doc-list li::before{content:'';position:absolute;left:0;top:16px;width:6px;height:6px;border-radius:2px;background:var(--violet-light);}
ul.doc-list li strong{color:var(--text);font-weight:600;}

/* SCREENSHOT PLACEHOLDER */
.shot{
  border:1px dashed rgba(179,157,255,0.35);
  background:var(--surface);
  border-radius:14px;
  padding:36px 20px;
  text-align:center;
  margin:20px 0 28px;
}
.shot .shot-icon{
  width:40px;height:40px;border-radius:10px;background:var(--surface-2);
  display:flex;align-items:center;justify-content:center;margin:0 auto 12px;
  border:1px solid var(--line);
}
.shot-label{font-family:var(--mono);font-size:12px;color:var(--violet-light);letter-spacing:0.02em;}
.shot-hint{font-family:var(--mono);font-size:11px;color:var(--text-dim);margin-top:4px;}
.shot.wide{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;}
.shot-row{display:flex;gap:16px;flex-wrap:wrap;}
.shot-row .shot{flex:1;min-width:200px;aspect-ratio:9/16;display:flex;flex-direction:column;align-items:center;justify-content:center;margin:0;}
.shot-row .shot img{width:100%;height:100%;object-fit:cover;border-radius:10px;}
.shot img{max-width:100%;height:auto;border-radius:10px;display:block;}
.shot.wide img{max-width:320px;height:auto;object-fit:contain;}
@media(max-width:640px){
  .shot-row{flex-direction:column;}
  .shot-row .shot{max-width:280px;margin:0 auto;}
}

/* WIP BADGE */
.wip-badge{display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:11.5px;color:var(--violet-light);background:rgba(179,157,255,0.08);border:1px solid rgba(179,157,255,0.25);padding:4px 12px;border-radius:100px;margin-left:10px;vertical-align:middle;white-space:nowrap;}
.wip-badge::before{content:'';width:7px;height:7px;border-radius:50%;background:var(--violet-light);animation:wip-pulse 1.8s ease-in-out infinite;}
@keyframes wip-pulse{0%,100%{opacity:0.4;}50%{opacity:1;}}
.wip-block{opacity:0.5;pointer-events:none;}

/* CALLOUT */
.callout{
  background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--violet-light);
  border-radius:10px;padding:16px 20px;margin:20px 0;
}
.callout.mint{border-left-color:var(--mint);}
.callout .callout-title{font-family:var(--mono);font-size:12px;color:var(--violet-light);margin-bottom:6px;text-transform:uppercase;letter-spacing:0.03em;}
.callout.mint .callout-title{color:var(--mint);}
.callout p{margin:0;font-size:14px;color:var(--text-dim);}

/* SPEC TABLE */
.spec-table{width:100%;border-collapse:collapse;margin:18px 0 28px;font-size:14px;}
.spec-table th{text-align:left;font-family:var(--mono);font-size:11.5px;color:var(--text-dim);text-transform:uppercase;letter-spacing:0.03em;padding:10px 14px;border-bottom:1px solid var(--line);}
.spec-table td{padding:12px 14px;border-bottom:1px solid var(--line);color:#D9D6E0;vertical-align:top;}
.spec-table td:first-child{font-weight:600;color:var(--text);white-space:nowrap;}
.spec-table tr:last-child td{border-bottom:none;}

/* toggle mock inline */
.mini-toggle{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12.5px;color:var(--text-dim);background:var(--surface-2);padding:5px 12px;border-radius:100px;margin:2px 4px 2px 0;}

/* FAQ */
.faq-item{border-bottom:1px solid var(--line);padding:18px 0;}
.faq-q{font-family:var(--display);font-weight:600;font-size:15.5px;margin-bottom:8px;}
.faq-a{font-size:14.5px;color:var(--text-dim);}

/* feedback box */
.feedback-box{
  background:linear-gradient(135deg, rgba(103,80,164,0.15), rgba(77,217,176,0.06));
  border:1px solid var(--line);border-radius:16px;padding:28px;margin-top:16px;
}
.feedback-box h3{font-family:var(--display);font-size:19px;margin-bottom:10px;}
.feedback-box a.mail-btn{
  display:inline-flex;align-items:center;gap:8px;margin-top:14px;
  background:var(--violet-light);color:#12101a;padding:11px 20px;border-radius:100px;
  font-size:14px;font-weight:600;
}

footer{border-top:1px solid var(--line);padding:32px 28px;text-align:center;font-family:var(--mono);font-size:12px;color:var(--text-dim);}