/* TC Signature Manager — visual identity
   Direction: "trusted instrument". An enterprise document tool should feel like
   precision equipment, not a marketing site. Cool slate ground, a single warm
   amber as the action accent (used sparingly), monospaced numerals for anything
   cryptographic (hashes, codes) so verification data reads as machine truth. */

:root{
  --ink:#0f172a;          /* near-black slate for text */
  --ink-2:#334155;
  --muted:#64748b;
  --line:#e2e8f0;
  --line-2:#cbd5e1;
  --panel:#ffffff;
  --ground:#f1f5f9;       /* app background */
  --amber:#d97706;        /* the one accent */
  --amber-soft:#fef3e2;
  --green:#047857;
  --green-soft:#ecfdf5;
  --red:#be123c;
  --red-soft:#fff1f2;
  --blue:#1d4ed8;
  --radius:12px;
  --radius-sm:8px;
  --mono:'SF Mono',ui-monospace,'Cascadia Code',Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,'Segoe UI',Inter,Roboto,Helvetica,Arial,sans-serif;
  --shadow:0 1px 2px rgba(15,23,42,.06),0 8px 24px rgba(15,23,42,.05);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);background:var(--ground);color:var(--ink);font-size:15px;line-height:1.5}
a{color:inherit;text-decoration:none}
code{font-family:var(--mono);font-size:.85em;background:#0f172a0d;padding:1px 5px;border-radius:5px}
h1,h2,h3{margin:0 0 .4em;letter-spacing:-.01em}
h1{font-size:24px}h2{font-size:18px}

/* ---- Auth / centered cards ---- */
.theme-body{background:linear-gradient(160deg,#0f172a,#1e293b);min-height:100vh}
.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.auth-wrap .card{width:100%;max-width:400px}

/* ---- Buttons ---- */
.btn{display:inline-flex;gap:8px;align-items:center;justify-content:center;
  background:var(--amber);color:#fff;border:1px solid var(--amber);border-radius:var(--radius-sm);
  padding:10px 16px;font:inherit;font-weight:600;cursor:pointer;transition:filter .15s,transform .02s}
.btn:hover{filter:brightness(1.05)}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line-2)}
.btn.ghost:hover{background:var(--ground);filter:none}
.btn.danger{background:var(--red);border-color:var(--red)}
.btn.secondary{background:var(--ink);border-color:var(--ink)}
.btn.sm{padding:6px 11px;font-size:13px}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ---- Forms ---- */
label{display:block;font-size:13px;font-weight:600;color:var(--ink-2);margin-bottom:6px}
input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line-2);
  border-radius:var(--radius-sm);background:#fff;font:inherit;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px var(--amber-soft)}
.form-group{margin-bottom:16px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.hint{font-size:12px;color:var(--muted);margin-top:5px}

/* ---- Alerts ---- */
.alert{padding:11px 14px;border-radius:var(--radius-sm);margin:0 0 16px;font-size:14px;border:1px solid transparent}
.alert.success{background:var(--green-soft);color:var(--green);border-color:#a7f3d0}
.alert.error{background:var(--red-soft);color:var(--red);border-color:#fecdd3}
.alert.warning{background:var(--amber-soft);color:#92400e;border-color:#fcd9a8}

/* ---- App shell ---- */
.admin-shell{display:grid;grid-template-columns:248px 1fr;min-height:100vh}
.sidebar{background:#fff;border-right:1px solid var(--line);position:sticky;top:0;height:100vh;overflow:auto}
.brand{display:flex;gap:11px;align-items:center;padding:20px 18px;border-bottom:1px solid var(--line)}
.brand-logo{width:42px;height:42px;object-fit:contain;border-radius:9px}
.brand-badge{width:42px;height:42px;border-radius:10px;background:var(--ink);color:#fff;font-weight:800;
  display:flex;align-items:center;justify-content:center;letter-spacing:-.02em}
.brand-text strong{display:block;font-size:14px;line-height:1.2}
.brand-text span{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.nav{padding:12px 10px;display:flex;flex-direction:column;gap:2px}
.nav a{display:block;padding:9px 13px;border-radius:var(--radius-sm);color:var(--ink-2);font-weight:500;font-size:14px}
.nav a:hover{background:var(--ground)}
.nav a.active{background:var(--ink);color:#fff}
.nav-logout{margin-top:10px;color:var(--red)!important}

.topbar{height:60px;background:#fff;border-bottom:1px solid var(--line);display:flex;
  align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:5}
.topbar-user{display:flex;align-items:center;gap:10px}
.avatar{width:32px;height:32px;border-radius:50%;background:var(--amber-soft);color:var(--amber);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.content{padding:28px 24px;max-width:1180px}
.page-title{margin-bottom:2px}
.subtle{color:var(--muted);margin:0 0 22px;font-size:14px}

/* ---- Layout helpers ---- */
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:1fr 1fr}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.stack{display:flex;flex-direction:column;gap:14px}
.flex{display:flex;gap:10px;align-items:center}
.flex-between{display:flex;justify-content:space-between;align-items:center;gap:12px}
.mt{margin-top:18px}.mb{margin-bottom:18px}

/* ---- Stat tiles ---- */
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.stat .num{font-family:var(--mono);font-size:30px;font-weight:600;letter-spacing:-.02em}
.stat .lbl{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-top:4px}

/* ---- Tables ---- */
.table-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line)}
th{background:var(--ground);font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);font-weight:600}
tr:last-child td{border-bottom:none}
tbody tr:hover{background:#fafbfc}
.mono{font-family:var(--mono);font-size:12.5px}
.small{font-size:12px;color:var(--muted)}

/* ---- Badges ---- */
.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:999px;font-size:12px;font-weight:600}
.badge.ok{background:var(--green-soft);color:var(--green)}
.badge.warn{background:var(--amber-soft);color:#92400e}
.badge.bad{background:var(--red-soft);color:var(--red)}
.badge.neutral{background:var(--ground);color:var(--ink-2)}
.dot{width:7px;height:7px;border-radius:50%;display:inline-block}

/* ---- Verification report ---- */
.verdict{display:flex;align-items:center;gap:14px;padding:18px 20px;border-radius:var(--radius);margin-bottom:18px}
.verdict.authentic{background:var(--green-soft);border:1px solid #a7f3d0}
.verdict.tampered_or_incomplete{background:var(--red-soft);border:1px solid #fecdd3}
.verdict .seal{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:24px}
.verdict.authentic .seal{background:var(--green);color:#fff}
.verdict.tampered_or_incomplete .seal{background:var(--red);color:#fff}
.check-row{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--line)}
.check-row:last-child{border:none}

/* ---- Permission matrix (roles) ---- */
.perm-group{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:14px;overflow:hidden}
.perm-group h3{margin:0;padding:12px 16px;background:var(--ground);font-size:13px;text-transform:uppercase;letter-spacing:.05em}
.perm-item{display:flex;align-items:center;gap:10px;padding:10px 16px;border-top:1px solid var(--line)}
.perm-item input{width:auto}
.perm-item label{margin:0;font-weight:500;color:var(--ink)}

/* ---- Editor canvas ---- */
.editor-grid{display:grid;grid-template-columns:1fr 300px;gap:18px;align-items:start}
.canvas-stage{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:auto;min-height:480px;display:flex;justify-content:center;padding:16px}
.canvas-stage img{max-width:100%;box-shadow:var(--shadow)}
.overlay-box{position:absolute;border:2px dashed var(--amber);background:#d976061a;cursor:move}

/* ---- Tabs ---- */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:20px}
.tabs a{padding:10px 16px;font-weight:600;font-size:14px;color:var(--muted);border-bottom:2px solid transparent}
.tabs a.active{color:var(--ink);border-bottom-color:var(--amber)}

/* ---- Modal ---- */
.modal-bg{position:fixed;inset:0;background:#0f172a99;display:none;align-items:center;justify-content:center;z-index:50;padding:20px}
.modal-bg.open{display:flex}
.modal{background:#fff;border-radius:var(--radius);padding:24px;max-width:560px;width:100%;box-shadow:var(--shadow);max-height:90vh;overflow:auto}

@media(max-width:900px){
  .admin-shell{grid-template-columns:1fr}
  .sidebar{position:static;height:auto}
  .nav{flex-direction:row;flex-wrap:wrap}
  .grid-2,.grid-3,.grid-4,.row,.editor-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}