:root{
  --bg:#0b1220;--panel:#101b2e;--panel2:#16233a;--text:#e8edf7;--muted:#94a3b8;--line:#26364f;--accent:#38bdf8;--accent2:#22c55e;--danger:#fb7185;--warn:#fbbf24;--shadow:0 18px 60px rgba(0,0,0,.35);--radius:18px;
}
body[data-theme="light"]{--bg:#f4f7fb;--panel:#ffffff;--panel2:#eef4fb;--text:#172033;--muted:#64748b;--line:#dbe4ef;--accent:#0369a1;--accent2:#15803d;--danger:#be123c;--warn:#b45309;--shadow:0 14px 40px rgba(15,23,42,.12)}
*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:radial-gradient(circle at top left,var(--panel2),var(--bg) 38%);color:var(--text);min-height:100vh}button,input,textarea,select{font:inherit}button{cursor:pointer;border:0;border-radius:12px;padding:10px 14px;font-weight:700}input,textarea,select{width:100%;background:var(--panel2);color:var(--text);border:1px solid var(--line);border-radius:12px;padding:11px 12px;outline:none}textarea{min-height:96px;resize:vertical}label{display:grid;gap:7px;color:var(--muted);font-size:13px}.hidden{display:none!important}.primary{background:linear-gradient(135deg,var(--accent),#2563eb);color:white}.secondary{background:var(--panel2);color:var(--text);border:1px solid var(--line)}.danger{background:var(--danger);color:white}.ghost{background:transparent;border:1px solid var(--line);color:var(--muted)}
.auth-shell{min-height:100vh;display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center;padding:48px;max-width:1180px;margin:auto}.brand-card{display:flex;gap:22px;align-items:center;padding:34px;border:1px solid var(--line);background:linear-gradient(135deg,rgba(56,189,248,.14),rgba(34,197,94,.08));border-radius:var(--radius);box-shadow:var(--shadow)}.brand-card h1{font-size:54px;margin:0 0 10px}.brand-card p{font-size:19px;line-height:1.45;color:var(--muted);max-width:640px}.brand-mark{width:82px;height:82px;border-radius:22px;background:linear-gradient(135deg,var(--accent),var(--accent2));display:grid;place-items:center;color:white;font-weight:900;font-size:30px}.brand-mark.small{width:42px;height:42px;border-radius:12px;font-size:16px}.auth-card,.panel,.stat,.card{background:rgba(16,27,46,.84);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}body[data-theme="light"] .auth-card,body[data-theme="light"] .panel,body[data-theme="light"] .stat,body[data-theme="light"] .card{background:rgba(255,255,255,.9)}.auth-card{padding:26px}.auth-tabs{display:flex;gap:10px;margin-bottom:18px}.tab{flex:1;background:var(--panel2);color:var(--muted);border:1px solid var(--line)}.tab.active{color:white;background:var(--accent)}.auth-form{display:grid;gap:14px}.demo-box{margin-top:18px;padding:16px;background:var(--panel2);border:1px solid var(--line);border-radius:14px;color:var(--muted)}.demo-box p{margin:8px 0 14px}
.app-shell{display:grid;grid-template-columns:270px 1fr;min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:rgba(5,10,20,.72);backdrop-filter:blur(18px);border-right:1px solid var(--line);padding:18px;display:flex;flex-direction:column;gap:16px}body[data-theme="light"] .sidebar{background:rgba(255,255,255,.78)}.side-brand{display:flex;gap:12px;align-items:center;padding-bottom:14px;border-bottom:1px solid var(--line)}.side-brand span{display:block;color:var(--muted);font-size:12px;margin-top:2px}nav{display:grid;gap:7px}.nav{text-align:left;background:transparent;color:var(--muted);border:1px solid transparent}.nav:hover,.nav.active{background:var(--panel2);border-color:var(--line);color:var(--text)}#logoutBtn{margin-top:auto}.content{padding:24px;overflow:auto}.topbar{display:flex;justify-content:space-between;gap:18px;align-items:center;margin-bottom:22px}.topbar h2{margin:0;font-size:30px}.topbar p{margin:5px 0 0;color:var(--muted)}.top-actions{display:flex;gap:10px;align-items:center;min-width:460px}.view{display:none}.active-view{display:block}.grid{display:grid;gap:16px}.stats{grid-template-columns:repeat(4,minmax(0,1fr));margin-bottom:18px}.stat{padding:18px}.stat span{color:var(--muted);font-size:13px}.stat strong{display:block;font-size:36px;margin-top:6px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}.wide-left{grid-template-columns:minmax(360px,.72fr) 1.28fr}.panel{padding:18px;margin-bottom:18px}.panel h3{margin:0 0 14px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.form-grid textarea,.form-grid button,.form-grid .check{grid-column:1/-1}.check{display:flex;align-items:center;gap:10px;background:var(--panel2);border:1px solid var(--line);padding:11px 12px;border-radius:12px}.check input{width:auto}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}.card{padding:15px}.card h4{margin:0 0 7px}.meta{display:flex;flex-wrap:wrap;gap:7px;margin:10px 0}.pill{display:inline-flex;gap:5px;align-items:center;background:var(--panel2);border:1px solid var(--line);border-radius:999px;padding:5px 9px;color:var(--muted);font-size:12px}.list{display:grid;gap:10px}.list-item{padding:12px;border:1px solid var(--line);background:var(--panel2);border-radius:14px}.list-item button{margin-top:10px}.viewer{min-height:530px;border:1px solid var(--line);background:var(--panel2);border-radius:14px;padding:14px;overflow:auto}.viewer.empty{display:grid;place-items:center;color:var(--muted)}.preview-frame{width:100%;height:520px;border:1px solid var(--line);border-radius:12px;background:white}.preview-img{max-width:100%;border-radius:12px;border:1px solid var(--line)}.file-notes{display:grid;gap:10px;margin-top:14px}.table-wrap{overflow:auto}.table-wrap table,table{width:100%;border-collapse:collapse;background:var(--panel);border-radius:14px;overflow:hidden}th,td{border-bottom:1px solid var(--line);padding:11px;text-align:left;vertical-align:top}th{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.05em}.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.toast-host{position:fixed;right:18px;top:18px;display:grid;gap:10px;z-index:99}.toast{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);padding:12px 14px;border-radius:14px;color:var(--text);min-width:260px}
@media(max-width:940px){.auth-shell,.app-shell{grid-template-columns:1fr}.sidebar{position:relative;height:auto}.topbar,.top-actions{flex-direction:column;align-items:stretch;min-width:0}.stats,.two-col,.form-grid,.settings-grid{grid-template-columns:1fr}.auth-shell{padding:20px}.brand-card h1{font-size:38px}}

/* Mobile and field-use refinements */
.mobile-menu-btn{display:none}
.mobile-backdrop{display:none}
.file-toolbar{display:flex;gap:10px;align-items:center;justify-content:space-between;margin-bottom:10px}
.file-summary{color:var(--muted);font-size:13px}
@media(max-width:1100px){
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .wide-left{grid-template-columns:1fr}
  .viewer{min-height:420px}
  .preview-frame{height:430px}
}
@media(max-width:760px){
  body{background:var(--bg)}
  .auth-shell{padding:14px;gap:14px;align-items:start}
  .brand-card{padding:18px;gap:14px;align-items:flex-start}
  .brand-card h1{font-size:34px}
  .brand-card p{font-size:15px}
  .brand-mark{width:58px;height:58px;border-radius:16px;font-size:22px;flex:0 0 auto}
  .auth-card{padding:16px}
  .app-shell{display:block;min-height:100vh}
  .mobile-menu-btn{display:inline-flex;align-items:center;justify-content:center;position:fixed;left:12px;top:12px;z-index:120;background:var(--panel);color:var(--text);border:1px solid var(--line);box-shadow:var(--shadow);padding:10px 12px;border-radius:12px}
  .mobile-backdrop.show{display:block;position:fixed;inset:0;background:rgba(0,0,0,.48);z-index:90}
  .sidebar{position:fixed;left:0;top:0;bottom:0;width:min(86vw,320px);height:100vh;z-index:110;transform:translateX(-105%);transition:transform .22s ease;overflow:auto;border-right:1px solid var(--line)}
  .sidebar.open{transform:translateX(0)}
  nav{gap:8px}.nav{padding:12px 14px}
  .content{padding:72px 12px 18px;overflow:visible}
  .topbar{gap:12px;margin-bottom:14px}.topbar h2{font-size:24px}.topbar p{font-size:13px}
  .top-actions{gap:8px}.top-actions button{width:100%}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.stat{padding:14px}.stat strong{font-size:28px}
  .panel{padding:14px;margin-bottom:14px;border-radius:14px}
  .card-grid{grid-template-columns:1fr;gap:10px}.card{padding:13px;border-radius:14px}
  .list-item{padding:12px}.list-item button{width:100%}
  .viewer{min-height:320px;padding:10px;border-radius:14px;max-height:none}.preview-frame{height:64vh;min-height:360px}.preview-img{width:100%;height:auto}.file-notes textarea{min-height:110px}
  input,textarea,select{font-size:16px;padding:12px}button{padding:12px 14px}.form-grid{gap:10px}
  .table-wrap{border:1px solid var(--line);border-radius:14px}.table-wrap table{min-width:760px}th,td{padding:10px;font-size:13px}
  .toast-host{left:12px;right:12px;top:auto;bottom:12px}.toast{min-width:0;width:100%}
}
@media(max-width:430px){
  .stats{grid-template-columns:1fr 1fr}.stat span{font-size:12px}.stat strong{font-size:24px}
  .brand-card{display:block}.brand-card .brand-mark{margin-bottom:12px}
  .auth-tabs{gap:6px}.tab{padding:10px 8px}
  .preview-frame{height:58vh;min-height:320px}
}