:root{
  --bg:#f3f4f8; --card:#fff; --ink:#111827; --muted:#6b7280; --line:#e5e7eb;
  --brand:#4f46e5; --brand-ink:#fff; --danger:#b91c1c; --danger-bg:#fef2f2; --warn-bg:#fffbeb; --warn:#92400e;
  --top:#111827; --nav:#fff;
}
@media (prefers-color-scheme: dark){
  :root{--bg:#0b0f1a; --card:#141a2b; --ink:#e5e7eb; --muted:#94a3b8; --line:#243049;
    --brand:#6366f1; --danger:#fca5a5; --danger-bg:#3a1b1b; --warn-bg:#3b2f12; --warn:#fcd34d; --top:#0a0d16; --nav:#101626;}
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink)}
img{max-width:100%}

/* ---- сторінки входу ---- */
.auth{min-height:100%;display:flex;align-items:center;justify-content:center;padding:16px}
.card{width:100%;max-width:400px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:28px;box-shadow:0 10px 30px rgba(0,0,0,.06)}
.wide .card{max-width:460px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.04em}
.brand .env{font-size:11px;background:var(--brand);color:var(--brand-ink);padding:2px 7px;border-radius:999px;letter-spacing:.06em}
h1{font-size:22px;margin:18px 0 12px}
label{display:block;font-size:13px;color:var(--muted);margin:12px 0 0}
input[type=text],input[type=password]{display:block;width:100%;margin-top:4px;padding:11px 12px;font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:9px}
input:focus{outline:2px solid var(--brand);outline-offset:1px}
input.code{letter-spacing:.2em;font-size:20px;text-align:center}
button,.btn{display:inline-block;width:100%;margin-top:18px;padding:11px 14px;font:inherit;font-weight:600;color:var(--brand-ink);background:var(--brand);border:0;border-radius:9px;cursor:pointer;text-align:center;text-decoration:none}
button:disabled{opacity:.6;cursor:wait}
button.link{background:none;color:var(--muted);font-weight:400;font-size:13px;margin-top:8px;text-decoration:underline}
button.ghost{width:auto;margin:0;padding:6px 12px;background:transparent;color:#fff;border:1px solid rgba(255,255,255,.3)}
.alert{background:var(--danger-bg);color:var(--danger);border-radius:9px;padding:10px 12px;margin:8px 0;font-size:14px}
.alert.warn{background:var(--warn-bg);color:var(--warn)}
.lead{margin:0 0 8px}
.note,.hint{color:var(--muted);font-size:13px}
.steps{padding-left:20px;margin:8px 0}
.qr{display:flex;justify-content:center;margin:12px 0}
.qr img{background:#fff;border-radius:10px;padding:6px;border:1px solid var(--line)}
code.secret{display:inline-block;margin-top:4px;padding:6px 10px;background:var(--bg);border:1px solid var(--line);border-radius:8px;font:600 14px ui-monospace,Menlo,Consolas,monospace;letter-spacing:.06em;word-break:break-all}
.codes{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:0;margin:12px 0;list-style:none;counter-reset:c}
.codes .bc{font:600 15px ui-monospace,Menlo,Consolas,monospace;padding:8px 10px;background:var(--bg);border:1px solid var(--line);border-radius:8px;text-align:center}
form.alt{margin:0}

/* ---- порожній каркас після входу ---- */
.shell{min-height:100%;display:grid;grid-template-columns:230px 1fr;grid-template-rows:54px 1fr;grid-template-areas:"top top" "nav work"}
.top{grid-area:top;display:flex;align-items:center;gap:14px;padding:0 16px;background:var(--top);color:#fff}
.top .brand img{display:block}
.top .spacer{flex:1}
.top .user{font-size:14px;opacity:.9}
.top .inline{margin:0}
.burger{display:none;width:auto;margin:0;padding:4px 10px;background:transparent;color:#fff;border:1px solid rgba(255,255,255,.3);font-size:18px}
.nav{grid-area:nav;background:var(--nav);border-right:1px solid var(--line);padding:12px 8px;display:flex;flex-direction:column;gap:2px}
.nav-item{display:block;padding:9px 12px;border-radius:8px;color:var(--ink);text-decoration:none}
.nav-item.active{background:var(--brand);color:var(--brand-ink);font-weight:600}
.nav-item.dis{color:var(--muted);opacity:.65;cursor:not-allowed}
.work{grid-area:work;padding:24px;display:flex}
.placeholder{margin:auto;text-align:center;max-width:520px}
.placeholder h1{font-size:26px}
.placeholder p{color:var(--muted)}

@media (max-width:800px){
  .shell{grid-template-columns:1fr;grid-template-areas:"top" "work"}
  .nav{display:none;position:fixed;top:54px;left:0;bottom:0;width:230px;z-index:5;box-shadow:0 10px 30px rgba(0,0,0,.3)}
  body.nav-open .nav{display:flex}
  .burger{display:inline-block}
  .top .user{display:none}
}