/* ============ AI OS · Obsidian-style vault ============ */
:root{
  --bg0:#0b0c0f; --bg1:#111318; --bg2:#171a20; --bg3:#20242c;
  --line:#262a31; --line2:#333842;
  --tx0:#f0ece8; --tx1:#c7c2be; --tx2:#9c9793; --tx3:#77726e;
  --acc:#b95d37; --acc2:#da8a64; --acc-dim:rgba(185,93,55,.15);
  --shadow:0 18px 50px rgba(0,0,0,.55);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"Cascadia Code","Segoe UI Mono",Consolas,Menlo,monospace;
  --topbar-h:46px; --status-h:25px; --ribbon-w:46px; --pane-w:min(470px,44vw);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  position:fixed;inset:0;overflow:hidden;
  background:var(--bg0);color:var(--tx1);
  font-family:var(--font);font-size:15px;line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overscroll-behavior:none;
}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--acc);outline-offset:2px;border-radius:4px}

/* ---------- canvas ---------- */
#scene{position:fixed;inset:0;width:100%;height:100%;display:block;touch-action:none;cursor:grab}
#scene.dragging{cursor:grabbing}
#scene.hovering{cursor:pointer}

/* ---------- top bar ---------- */
#topbar{
  position:fixed;top:0;left:0;right:0;height:var(--topbar-h);z-index:40;
  display:flex;align-items:center;gap:8px;padding:0 10px;
  background:rgba(14,16,19,.97);
  border-bottom:1px solid var(--line);
}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:7px;color:var(--tx2);flex:none;
}
.icon-btn:hover{background:var(--bg2);color:var(--tx0)}
.icon-btn svg{width:18px;height:18px}
.tab{
  display:flex;align-items:center;gap:9px;min-width:0;
  background:var(--bg2);border:1px solid var(--line2);border-radius:8px;
  padding:5px 8px 5px 13px;font-size:13px;color:var(--tx0);
}
.tab-dot{width:7px;height:7px;border-radius:50%;background:var(--acc);flex:none;box-shadow:0 0 8px var(--acc)}
#tabTitle{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:38vw}
.tab-close{
  width:20px;height:20px;border-radius:5px;color:var(--tx2);line-height:1;
  display:none;align-items:center;justify-content:center;font-size:15px;flex:none;
}
.tab.has-note .tab-close{display:inline-flex}
.tab-close:hover{background:var(--bg3);color:var(--tx0)}
.spacer{flex:1}
.cta{
  display:inline-flex;align-items:center;gap:8px;flex:none;
  background:var(--acc);color:#17141f;font-weight:600;font-size:13px;
  padding:7px 14px;border-radius:8px;transition:transform .15s ease,background .15s ease;
}
.cta:hover{background:var(--acc2);transform:translateY(-1px)}
.cta svg{width:15px;height:15px}

/* ---------- ribbon ---------- */
#ribbon{
  position:fixed;left:0;top:var(--topbar-h);bottom:0;width:var(--ribbon-w);z-index:35;
  display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 0;
  background:rgba(17,19,24,.96);border-right:1px solid var(--line);
}
#ribbon .icon-btn.active{color:var(--acc)}
#ribbon .rspacer{flex:1}

/* ---------- explorer ---------- */
#explorer{
  position:fixed;left:var(--ribbon-w);top:var(--topbar-h);bottom:var(--status-h);width:284px;z-index:34;
  display:flex;flex-direction:column;
  background:rgba(21,24,29,.98);
  border-right:1px solid var(--line);
  transform:translateX(0);transition:transform .3s cubic-bezier(.33,.7,.2,1),opacity .3s ease;
}
#explorer.closed{transform:translateX(-108%);opacity:0;pointer-events:none}
.exp-head{
  display:flex;align-items:baseline;gap:8px;padding:14px 16px 8px;
  font-size:11px;font-weight:700;letter-spacing:.14em;color:var(--tx2);
}
.vault-count{font-weight:400;letter-spacing:0;color:var(--tx3);font-family:var(--mono);font-size:10.5px}
.exp-search{padding:2px 12px 10px}
.exp-search input{
  width:100%;background:var(--bg0);border:1px solid var(--line2);border-radius:7px;
  color:var(--tx0);font-size:13px;padding:6px 10px;
}
.exp-search input::placeholder{color:var(--tx3)}
.exp-list{flex:1;overflow-y:auto;padding:2px 8px 16px}
.folder-h{
  display:flex;align-items:center;gap:5px;width:100%;
  padding:5px 8px;margin-top:6px;border-radius:6px;
  font-size:11.5px;font-weight:600;letter-spacing:.06em;color:var(--tx2);text-align:left;
}
.folder-h:hover{color:var(--tx0)}
.folder-h .chev{width:11px;height:11px;transition:transform .18s ease;flex:none}
.folder.collapsed .chev{transform:rotate(-90deg)}
.folder.collapsed .folder-items{display:none}
.file{
  display:flex;align-items:center;gap:8px;width:100%;
  padding:5.5px 8px 5.5px 22px;border-radius:6px;
  font-size:13.5px;color:var(--tx1);text-align:left;
}
.file svg{width:13px;height:13px;color:var(--tx3);flex:none}
.file:hover{background:var(--bg2);color:var(--tx0)}
.file.active{background:var(--acc-dim);color:var(--acc2)}
.file.active svg{color:var(--acc)}
.file span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file.hidden{display:none}

#backdrop{
  position:fixed;inset:0;z-index:33;background:rgba(10,9,13,.5);
  opacity:0;pointer-events:none;transition:opacity .3s ease;
}
#backdrop.show{opacity:1;pointer-events:auto}

/* ---------- note pane ---------- */
#pane{
  position:fixed;right:0;top:var(--topbar-h);bottom:var(--status-h);width:var(--pane-w);z-index:36;
  display:flex;flex-direction:column;
  background:rgba(21,24,29,.985);
  border-left:1px solid var(--line);box-shadow:var(--shadow);
  transform:translateX(106%);transition:transform .34s cubic-bezier(.33,.72,.2,1);
}
#pane.open{transform:translateX(0)}
.pane-grip{display:none}
.pane-head{
  display:flex;align-items:center;gap:8px;padding:10px 12px 8px 22px;flex:none;
}
.crumb{
  flex:1;min-width:0;font-size:11.5px;color:var(--tx3);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:.03em;
}
.crumb b{color:var(--tx2);font-weight:500}
.pane-scroll{flex:1;overflow-y:auto;padding:2px 26px 40px 26px;scrollbar-gutter:stable}
#noteTitle{
  font-size:24px;line-height:1.25;font-weight:700;color:var(--tx0);
  letter-spacing:-.01em;margin:6px 0 10px;text-wrap:balance;
}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:18px}
.tag{
  font-size:11px;font-weight:500;color:var(--acc2);background:var(--acc-dim);
  padding:2.5px 9px;border-radius:20px;
}
.note-content{max-width:62ch}
.note-content p{margin:0 0 13px;color:var(--tx1);font-size:14.5px}
.note-content b{color:var(--tx0);font-weight:600}
.note-content i{color:var(--tx2)}
.note-content h2{
  font-size:15px;font-weight:650;color:var(--tx0);margin:22px 0 8px;letter-spacing:.01em;
}
.note-content ul{margin:0 0 14px;padding-left:20px}
.note-content li{margin:4px 0;font-size:14.5px}
.note-content li::marker{color:var(--acc)}
.note-content .callout{
  background:var(--acc-dim);border-left:3px solid var(--acc);
  padding:11px 15px;border-radius:0 8px 8px 0;margin:16px 0;
}
.note-content .callout,.note-content .callout p{color:var(--tx0);font-size:14px;margin:0}
a.wl{color:var(--acc);text-decoration:none;cursor:pointer;border-bottom:1px solid transparent;transition:border-color .12s}
a.wl:hover{color:var(--acc2);border-bottom-color:var(--acc2)}
.note-content a.mail{
  display:inline-flex;align-items:center;gap:9px;margin:6px 0 10px;
  background:var(--acc);color:#17141f;font-weight:650;font-size:14.5px;
  padding:10px 18px;border-radius:9px;text-decoration:none;transition:background .15s;
}
.note-content a.mail:hover{background:var(--acc2)}
.backlinks{margin-top:30px;padding-top:14px;border-top:1px solid var(--line)}
.backlinks h3{
  font-size:11px;font-weight:700;letter-spacing:.12em;color:var(--tx3);margin-bottom:10px;
}
.backlinks .bl{display:flex;flex-wrap:wrap;gap:7px}
.backlinks button{
  font-size:12.5px;color:var(--tx1);background:var(--bg2);border:1px solid var(--line2);
  padding:4px 11px;border-radius:16px;transition:all .12s;
}
.backlinks button:hover{color:var(--acc2);border-color:var(--acc)}

/* ---------- status bar ---------- */
#status{
  position:fixed;right:0;bottom:0;height:var(--status-h);z-index:38;
  display:flex;align-items:center;gap:9px;padding:0 12px;
  font-family:var(--mono);font-size:10.5px;color:var(--tx3);
  background:rgba(17,19,24,.94);border:1px solid var(--line);border-right:0;border-bottom:0;
  border-top-left-radius:8px;
}
#status .sep{opacity:.5}

/* ---------- hint ---------- */
#hint{
  position:fixed;left:50%;bottom:34px;transform:translateX(-50%);z-index:32;
  font-size:12px;color:var(--tx2);background:rgba(17,19,24,.94);
  border:1px solid var(--line2);border-radius:20px;padding:7px 16px;
  transition:opacity .8s ease;white-space:nowrap;pointer-events:none;
}
#hint.hide{opacity:0}

/* ---------- boot ---------- */
#boot{
  position:fixed;inset:0;z-index:100;background:#131217;
  display:flex;align-items:center;justify-content:center;
  transition:opacity .55s ease;
}
#boot.fade{opacity:0;pointer-events:none}
.boot-inner{padding:0 24px;max-width:520px;width:100%}
.boot-logo{
  display:flex;align-items:center;gap:14px;
  font-size:34px;font-weight:800;letter-spacing:-.02em;color:var(--tx0);margin-bottom:22px;
}
.boot-logo svg{width:40px;height:40px;color:var(--acc);filter:drop-shadow(0 0 14px rgba(185,93,55,.45))}
#bootLines{
  font-family:var(--mono);font-size:13px;line-height:2;color:var(--tx2);
  white-space:pre-wrap;min-height:104px;
}
#bootLines .ok{color:var(--acc)}
.boot-caret{display:inline-block;width:7px;height:14px;background:var(--acc);vertical-align:-2px;animation:blink .9s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* ---------- webgl fail ---------- */
#glfail{
  position:fixed;inset:0;z-index:90;display:none;align-items:center;justify-content:center;
  background:var(--bg0);padding:24px;text-align:center;color:var(--tx1);
}

/* ---------- scrollbars ---------- */
.exp-list::-webkit-scrollbar,.pane-scroll::-webkit-scrollbar{width:9px}
.exp-list::-webkit-scrollbar-thumb,.pane-scroll::-webkit-scrollbar-thumb{
  background:var(--bg3);border-radius:8px;border:2px solid transparent;background-clip:content-box;
}
.exp-list::-webkit-scrollbar-thumb:hover,.pane-scroll::-webkit-scrollbar-thumb:hover{background:var(--line2);background-clip:content-box}

/* ---------- mobile ---------- */
@media (max-width:860px){
  :root{--topbar-h:50px}
  #ribbon{display:none}
  .cta span{display:none}
  .cta{padding:8px 11px}
  #tabTitle{max-width:44vw}
  #explorer{
    left:0;top:var(--topbar-h);bottom:0;width:min(320px,85vw);
    border-right:1px solid var(--line2);box-shadow:var(--shadow);
  }
  #pane{
    left:0;right:0;top:auto;bottom:0;width:auto;height:min(64%,600px);
    border-left:0;border-top:1px solid var(--line2);
    border-radius:18px 18px 0 0;
    transform:translateY(108%);transition:transform .36s cubic-bezier(.33,.72,.2,1);
  }
  #pane.open{transform:translateY(0)}
  .pane-grip{
    display:block;width:42px;height:4.5px;border-radius:4px;background:var(--bg3);
    margin:9px auto 0;flex:none;
  }
  .pane-head{padding:6px 10px 4px 20px}
  .pane-scroll{padding:0 20px 46px}
  #noteTitle{font-size:21px}
  #hint{bottom:20px;font-size:11.5px}
  #status{display:none}
  .boot-logo{font-size:28px}
}

/* ---------- tlačítko zpět na web (propojení s hlavní stránkou) ---------- */
.brain-back{
  display:inline-flex;align-items:center;gap:8px;flex:none;
  height:32px;padding:0 13px 0 11px;border-radius:7px;
  color:var(--tx0);background:var(--bg2);border:1px solid var(--line2);
  font-size:12.5px;font-weight:500;letter-spacing:.01em;
  transition:background .15s ease,border-color .15s ease,color .15s ease;
}
.brain-back:hover{background:var(--acc);color:#12140b;border-color:var(--acc)}
.brain-back svg{width:15px;height:15px;flex:none}
@media (max-width:860px){
  .brain-back .brain-back-label{display:none}
  .brain-back{padding:0 9px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
}