:root{
  /* palette adapted from the Claude Design "Файловый сервер" mockup */
  --bg:#0e0f12; --panel:#16181d; --panel2:#101216; --elev:#1c1f26;
  --line:#23272f; --line2:#2e3440; --line3:#363c48;
  --txt:#e6e8ec; --txt2:#cbd0d8; --muted:#9aa0ab; --dim:#5c626d;
  --accent:#57d9a3; --accent2:#3fbf8a; --accent-bright:#6ee7b3; --accent-dim:#06231a;
  --blue:#6aa6ff; --purple:#b69bff; --amber:#e6b86a; --red:#d98a8a;
  --radius:10px;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{
  background:var(--bg);
  color:var(--txt);
  font:14px/1.5 var(--mono);
  -webkit-font-smoothing:antialiased;
}
.hidden{display:none!important}
.mono{font-family:var(--mono)}
.muted{color:var(--muted)}
.sm{font-size:12px}
.link{color:var(--accent);cursor:pointer;text-decoration:none;border-bottom:1px dashed var(--accent)}
.spacer{flex:1}
.brand{font-weight:700;font-size:16px;letter-spacing:.5px;display:flex;align-items:center;gap:8px;white-space:nowrap}
.bolt{color:var(--accent);filter:drop-shadow(0 0 8px rgba(87,217,163,.5))}
a{color:var(--accent)}

/* uppercase tracked section labels (signature of the reference design) */
.eyebrow{font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--dim)}

/* controls */
input,textarea,select,button{font-family:var(--mono);color:var(--txt)}
input,textarea,select{background:var(--panel2);border:1px solid var(--line);border-radius:8px;
  padding:11px 13px;outline:none;transition:border .15s,box-shadow .15s;width:100%;font-size:13px}
input::placeholder,textarea::placeholder{color:var(--dim)}
input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(87,217,163,.15)}
textarea{resize:vertical}
button{cursor:pointer;background:transparent;border:1px solid transparent;border-radius:8px;padding:9px 15px;font-weight:600;font-size:13px;transition:all .15s}
button:active{transform:translateY(1px)}
button.primary{background:linear-gradient(90deg,var(--accent),var(--accent2));color:#06120c;border:none}
button.primary:hover{filter:brightness(1.08);box-shadow:0 0 18px rgba(87,217,163,.25)}
button.ghost{border:1px solid var(--line);color:var(--txt2);font-weight:500;background:var(--panel2)}
button.ghost:hover{border-color:var(--accent);color:var(--txt)}
button.icon{padding:8px 11px;font-size:15px;line-height:1}
button.danger{color:var(--red);border-color:transparent;background:transparent}
button.danger:hover{background:rgba(217,138,138,.12)}

/* login */
.login{min-height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;gap:18px;
  background:radial-gradient(900px 500px at 50% -10%, #14211c 0%, var(--bg) 60%)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:30px;width:min(380px,100%);box-shadow:0 24px 70px rgba(0,0,0,.5)}
.card .sub{color:var(--muted);margin:8px 0 22px;font-size:13px}
.card input{margin-bottom:14px}
.card button{width:100%}
.err{color:var(--red);font-size:13px;min-height:18px;margin-top:8px}
.hint{color:var(--dim);font-size:12px;text-align:center;max-width:560px;margin:0 auto;padding:14px 16px}

/* topbar + tabs */
.topbar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:12px;padding:11px 16px;
  background:rgba(14,15,18,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.tabs{display:flex;gap:3px;background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:3px}
.tab{background:transparent;border:none;color:var(--muted);font-weight:600;font-size:13px;padding:7px 14px;border-radius:8px;display:flex;align-items:center;gap:6px}
.tab.active{background:var(--accent-dim);color:var(--accent-bright);box-shadow:inset 0 0 0 1px rgba(87,217,163,.25)}
.tab:hover:not(.active){color:var(--txt)}
.badge{font-size:11px;font-weight:600;letter-spacing:.5px;padding:4px 10px;border-radius:999px;border:1px solid var(--line);text-transform:uppercase}
.badge.owner{color:var(--accent-bright);background:var(--accent-dim);border-color:#1c5740}
.badge.guest{color:var(--amber);background:rgba(230,184,106,.1);border-color:#5c4a26}

/* views */
.view{max-width:1040px;margin:0 auto;padding:18px 16px 8px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px}
.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:12px}
.opts label{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:12px;width:auto}
.opts select{width:auto}
.opts .chk input{width:auto}

/* drop zone — diagonal stripe texture from the reference */
.drop{border:1.5px dashed var(--line2);border-radius:12px;padding:28px;text-align:center;cursor:pointer;transition:border .15s,background .15s;
  background:repeating-linear-gradient(45deg,#101216 0 10px,#14161b 10px 20px)}
.drop:hover,.drop.over{border-color:var(--accent);background:rgba(87,217,163,.06)}
.drop-ico{font-size:28px;color:var(--accent);margin-bottom:6px}
.drop-inner b{color:var(--txt)}

/* disk gauge */
.disk{margin-top:14px}
.disk-bar{height:8px;background:#0a0b0d;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.disk-bar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-bright));transition:width .3s}
.disk-bar.warn>i{background:linear-gradient(90deg,var(--amber),var(--red))}
.disk-txt{margin-top:6px;font-size:12px}

/* uploads */
.uploads{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.up{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:9px 12px}
.up .nm{display:flex;justify-content:space-between;font-size:13px;margin-bottom:6px;gap:8px}
.up .nm .pct{color:var(--accent)}
.bar{height:6px;background:#0a0b0d;border-radius:999px;overflow:hidden}
.bar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-bright));transition:width .15s}
.up.err .bar>i{background:var(--red)}
.up-stats{margin-top:5px;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}

/* lists */
.list{margin-top:14px;display:flex;flex-direction:column;gap:7px}
.item{display:flex;align-items:center;gap:12px;background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;transition:border .15s,background .15s}
.item:hover{border-color:var(--line3);background:var(--elev)}
.item .ico{font-size:18px;width:22px;text-align:center;flex:none}
.item .meta{flex:1;min-width:0}
.item .meta .t{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:13px}
.item .meta .s{color:var(--muted);font-size:11px;display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:2px}
.item .acts{display:flex;gap:4px;align-items:center;flex:none}
.item .acts a{display:inline-flex}

/* file-type badge (colored by category, like the reference) */
.ftype{font-size:10px;font-weight:700;letter-spacing:.5px;padding:2px 6px;border-radius:5px;text-transform:uppercase;
  background:var(--panel);border:1px solid var(--line);color:var(--muted);flex:none;min-width:34px;text-align:center}
.ftype.img{color:var(--purple);border-color:#3a3357}
.ftype.code{color:var(--accent);border-color:#1c5740}
.ftype.doc{color:var(--blue);border-color:#2a3a5c}
.ftype.arch{color:var(--amber);border-color:#5c4a26}
.ftype.media{color:var(--red);border-color:#5c2e2e}

.tag{font-size:10px;padding:1px 7px;border-radius:999px;border:1px solid var(--line);color:var(--muted);letter-spacing:.3px}
.tag.burn{color:var(--red);border-color:#5c2e2e}
.tag.exp{color:var(--amber);border-color:#5c4a26}
.tag.shared{color:var(--accent-bright);border-color:#1c5740;cursor:pointer}
.empty{color:var(--dim);font-size:13px;text-align:center;padding:18px}

/* split view: sidebar + editor */
.split{display:grid;grid-template-columns:280px 1fr;gap:14px;min-height:62vh}
.sidebar{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:12px;display:flex;flex-direction:column;gap:10px;min-height:0}
.sidebar-head{display:flex;gap:8px;align-items:center}
.search{padding:8px 10px}
.note-list{display:flex;flex-direction:column;gap:6px;overflow:auto;flex:1}
.nl-item{padding:10px 12px;border:1px solid var(--line);border-radius:9px;background:var(--panel2);cursor:pointer;transition:border .15s,background .15s}
.nl-item:hover{border-color:var(--line3)}
.nl-item.active{border-color:var(--accent);background:var(--accent-dim)}
.nl-item .t{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:flex;align-items:center;gap:6px;font-size:13px}
.nl-item .s{color:var(--muted);font-size:11px;margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.editor{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;display:flex;flex-direction:column;min-height:0}
.editor-inner{display:flex;flex-direction:column;gap:10px;flex:1;min-height:0}
.empty-state{margin:auto;color:var(--dim);text-align:center;padding:40px 20px}
.title-input{font-size:16px;font-weight:600}
.code{font-family:var(--mono);font-size:13px;line-height:1.6;background:var(--panel2);min-height:200px;flex:1;tab-size:2}
.code.tall{min-height:300px}
.editor-bar,.filebar{display:flex;align-items:center;gap:8px;flex-wrap:wrap}

/* sites */
.site-head{display:flex;align-items:flex-start;gap:10px;flex-wrap:wrap}
.site-title{font-size:16px;font-weight:700}
.site-url{font-size:12px;color:var(--accent);word-break:break-all}
.site-files{display:flex;gap:6px;flex-wrap:wrap}
.sf{padding:5px 10px;border:1px solid var(--line);border-radius:7px;background:var(--panel2);cursor:pointer;font-size:12px;font-family:var(--mono);display:flex;align-items:center;gap:6px}
.sf:hover{border-color:var(--line3)}
.sf.active{border-color:var(--accent);background:var(--accent-dim)}
.sf .x{color:var(--dim);font-size:12px}
.sf .x:hover{color:var(--red)}
.owner-only-note{padding:4px 2px}

/* modal + toast */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.66);display:flex;align-items:center;justify-content:center;z-index:20;backdrop-filter:blur(3px);padding:16px}
.modal-card{background:var(--panel);border:1px solid var(--line2);border-radius:14px;padding:22px;text-align:center;display:flex;flex-direction:column;gap:14px;align-items:center;max-width:380px;width:100%;box-shadow:0 24px 70px rgba(0,0,0,.6)}
.modal-card img{background:#fff;border-radius:10px;padding:8px}
.modal-card h3{margin:0;font-size:15px;letter-spacing:.3px}
.modal-card input{text-align:left}
.modal-row{display:flex;gap:8px;width:100%}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--elev);border:1px solid var(--line2);
  color:var(--txt);padding:10px 16px;border-radius:10px;box-shadow:0 12px 34px rgba(0,0,0,.6);z-index:30;font-size:13px}

/* responsive */
@media(max-width:780px){
  .topbar{flex-wrap:wrap}
  .tabs{order:3;width:100%;justify-content:space-between}
  .tab{flex:1;justify-content:center}
  .split{grid-template-columns:1fr;min-height:auto}
  .note-list{max-height:38vh}
  .brand span:not(.bolt){display:none}
}