:root{
  --bg:#f4f5f7;--panel:#fff;--ink:#1d2330;--muted:#5f6878;--line:#e2e5ea;
  --brand:#1f6feb;--brand-ink:#fff;--brand-soft:#e8f0fe;
  --ok:#1a7f37;--warn:#b35900;--bad:#c62828;
  --nav:#151a23;--nav-ink:#c9d1dc;
  --radius:10px;--shadow:0 1px 2px rgba(16,24,40,.06),0 4px 12px rgba(16,24,40,.06);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;background:var(--bg);color:var(--ink);font-size:14px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
*:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.skip-link{position:absolute;left:-9999px;top:0;background:#000;color:#fff;padding:8px 12px;z-index:9999}
.skip-link:focus{left:8px;top:8px}
h1{font-size:20px;margin:0}
h2{font-size:16px;margin:0 0 12px}
h3{font-size:14px;margin:0 0 8px}

/* layout */
.shell{display:flex;min-height:100vh}
.sidenav{width:200px;background:var(--nav);color:var(--nav-ink);flex-shrink:0;display:flex;flex-direction:column}
.sidenav .logo{padding:18px 18px 14px;font-weight:700;font-size:17px;color:#fff;letter-spacing:.3px}
.sidenav .logo span{color:#6ea8fe}
.sidenav nav a{display:flex;gap:10px;align-items:center;padding:10px 18px;color:var(--nav-ink);font-size:14px}
.sidenav nav a:hover{background:#202734;text-decoration:none}
.sidenav nav a[aria-current=page]{background:#263042;color:#fff;border-left:3px solid #6ea8fe;padding-left:15px}
.sidenav .me{margin-top:auto;padding:14px 18px;font-size:12px;border-top:1px solid #263042}
.sidenav .me a{color:#9fb3c8}
.main{flex:1;min-width:0;padding:22px 26px}
.topbar{display:flex;align-items:center;gap:12px;margin-bottom:18px;flex-wrap:wrap}
.topbar .grow{flex:1}

/* widgets */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;color:var(--ink);
  padding:7px 13px;border-radius:8px;font-size:13px;cursor:pointer;font-weight:500;white-space:nowrap;line-height:1.3}
.btn:hover{background:#f2f4f7;text-decoration:none}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:#1a5fd0}
.btn.ok{background:var(--ok);border-color:var(--ok);color:#fff}
.btn.danger{color:var(--bad)}
.btn.sm{padding:4px 9px;font-size:12px}
.btn:disabled{opacity:.5;cursor:not-allowed}
input,select,textarea{font:inherit;border:1px solid #cfd4dc;border-radius:7px;padding:7px 9px;background:#fff;color:var(--ink);min-width:0}
input:focus,select:focus,textarea:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px var(--brand-soft)}
label{font-size:12px;color:var(--muted);display:block;margin-bottom:4px}
.field{margin-bottom:12px}
.field input,.field select,.field textarea{width:100%}
.row{display:flex;gap:10px}
.row>*{flex:1}
table.grid{width:100%;border-collapse:collapse;background:#fff}
table.grid th,table.grid td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
table.grid th{font-size:12px;color:var(--muted);font-weight:600;background:#fafbfc}
table.grid tr:hover td{background:#fafcff}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.badge{display:inline-block;padding:2px 8px;border-radius:20px;font-size:12px;background:#eef1f5;color:#3d4757;white-space:nowrap}
.badge.draft{background:#eef1f5}.badge.quoted{background:#e8f0fe;color:#1a56c4}.badge.ordered{background:#e6f4ea;color:var(--ok)}
.badge.pending{background:#fff4e5;color:var(--warn)}.badge.deposit_paid{background:#e8f0fe;color:#1a56c4}
.badge.in_production{background:#f3e8fd;color:#7b2cbf}.badge.ready{background:#e0f7fa;color:#00796b}
.badge.delivered,.badge.installed{background:#e6f4ea;color:var(--ok)}.badge.completed{background:#d7f0dd;color:#0e5a27}
.badge.cancelled{background:#fde8e8;color:var(--bad)}
.muted{color:var(--muted)}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 10px;font-size:13px}
.kv>span:nth-child(odd){color:var(--muted);white-space:nowrap}
.empty{padding:40px;text-align:center;color:var(--muted)}
.toast{position:fixed;right:20px;bottom:20px;background:#1d2330;color:#fff;padding:10px 16px;border-radius:8px;z-index:9999;
  box-shadow:var(--shadow);font-size:13px;max-width:420px}
.toast.err{background:var(--bad)}

/* modal */
.modal-bg{position:fixed;inset:0;background:rgba(15,20,30,.45);display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px}
.modal{background:#fff;border-radius:12px;width:520px;max-width:100%;max-height:90vh;overflow:auto;padding:20px 22px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.modal .actions{display:flex;justify-content:flex-end;gap:8px;margin-top:16px}

/* project cards */
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.pcard .thumb{height:160px;background:#e9edf2 center/cover no-repeat;display:flex;align-items:center;justify-content:center;color:#9aa5b4;font-size:13px}
.pcard .thumb img{width:100%;height:100%;object-fit:cover;display:block}
.pcard .body{padding:12px 14px;flex:1}
.pcard .title{font-weight:600;font-size:15px;margin-bottom:4px}
.pcard .meta{font-size:12px;color:var(--muted)}
.pcard .foot{display:flex;gap:6px;padding:10px 14px;border-top:1px solid var(--line);flex-wrap:wrap}

@media(max-width:800px){
  .shell{flex-direction:column}
  .sidenav{width:auto;flex-direction:row;flex-wrap:wrap;align-items:center}
  .sidenav nav{display:flex;flex-wrap:wrap}
  .sidenav .me{margin:0;border:0}
  .main{padding:16px}
}

/* language switch, AI upload */
.lang-sel{font-size:12px;padding:4px 6px;margin-bottom:8px;max-width:120px}
.sidenav .lang-sel{background:#202734;color:#c9d1dc;border-color:#2d3647}
.ai-drop{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;border:2px dashed #b9c6d8;border-radius:12px;
  padding:18px;margin-bottom:14px;cursor:pointer;color:var(--brand);font-weight:600;background:#f7faff;text-align:center;min-height:90px}
.ai-drop:hover{background:var(--brand-soft)}
.ai-drop:focus-within{outline:3px solid var(--brand);outline-offset:2px}
.vh{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.ai-drop img{max-width:100%;max-height:220px;border-radius:8px}
.ai-prog{background:#eef4ff;border-radius:8px;padding:10px 12px;font-size:13px}
.ai-ok{background:#e6f4ea;color:#0e5a27;border-radius:8px;padding:10px 12px;font-size:13px}
.warn{background:#fff4e5;color:#7a4100;border-radius:8px;padding:8px 10px;font-size:12.5px}
.badge.web{background:#fff1e6;color:#b4500e}