:root{
  --brand:#2d6a4f;
  --brand-dark:#1b4332;
  --bg:#f6f7f5;
  --card:#ffffff;
  --border:#e2e5e1;
  --text:#1f2421;
  --muted:#6b7268;
  --danger:#c0392b;
  --warn:#e67e22;
  --ok:#2d6a4f;
}
*{box-sizing:border-box;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--text);
}
header.app-header{
  background:var(--brand-dark);
  color:#fff;
  padding:16px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:8px;
}
header.app-header h1{margin:0;font-size:20px;}
header.app-header .subtitle{font-size:13px;opacity:.8;}
header.app-header .logout{color:#fff;font-size:13px;text-decoration:none;opacity:.85;border:1px solid rgba(255,255,255,.4);padding:6px 12px;border-radius:8px;}
header.app-header .logout:hover{opacity:1;background:rgba(255,255,255,.1);}
nav.app-nav{
  display:flex;
  gap:4px;
  background:#fff;
  padding:8px 12px;
  border-bottom:1px solid var(--border);
  overflow-x:auto;
}
nav.app-nav a{
  border:none;
  background:transparent;
  padding:10px 16px;
  border-radius:8px;
  cursor:pointer;
  font-size:14px;
  color:var(--muted);
  font-weight:600;
  white-space:nowrap;
  text-decoration:none;
}
nav.app-nav a.active{background:var(--brand);color:#fff;}
main{padding:16px 20px 60px;max-width:1100px;margin:0 auto;}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:20px;}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;}
.card .label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;}
.card .value{font-size:26px;font-weight:700;margin-top:4px;}
.card.alert .value{color:var(--danger);}
.panel{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:16px;}
.panel h2{margin-top:0;font-size:16px;}
table{width:100%;border-collapse:collapse;font-size:13px;}
th,td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--border);}
th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;}
tr:hover td{background:#fafbfa;}
.badge{padding:2px 8px;border-radius:999px;font-size:11px;font-weight:700;}
.badge.entrada{background:#e6f4ea;color:var(--ok);}
.badge.salida{background:#fdecea;color:var(--danger);}
.badge.ajuste{background:#eaf1fd;color:#2d5fa6;}
.badge.low{background:#fdf0e2;color:var(--warn);}
form.grid-form{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));}
form.grid-form .full{grid-column:1/-1;}
label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px;font-weight:600;}
input,select,textarea{
  width:100%;padding:9px 10px;border:1px solid var(--border);border-radius:8px;font-size:14px;
  font-family:inherit;
}
.btn{
  background:var(--brand);color:#fff;border:none;border-radius:8px;padding:10px 18px;
  font-size:14px;font-weight:700;cursor:pointer;display:inline-block;text-decoration:none;
}
.btn:hover{background:var(--brand-dark);}
.btn.secondary{background:#fff;color:var(--brand);border:1px solid var(--brand);}
.btn.danger{background:#fff;color:var(--danger);border:1px solid var(--danger);}
.search{margin-bottom:10px;}
.empty{color:var(--muted);font-size:13px;padding:20px 0;text-align:center;}
.alert-error{background:#fdecea;color:var(--danger);padding:10px 14px;border-radius:8px;margin-bottom:14px;font-size:14px;}
.alert-ok{background:#e6f4ea;color:var(--ok);padding:10px 14px;border-radius:8px;margin-bottom:14px;font-size:14px;}

/* Login */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:var(--brand-dark);}
.login-card{background:#fff;padding:32px;border-radius:14px;width:100%;max-width:340px;box-shadow:0 10px 30px rgba(0,0,0,.25);}
.login-card h1{margin:0 0 4px;font-size:20px;}
.login-card .subtitle{color:var(--muted);font-size:13px;margin-bottom:18px;}
.login-card .btn{width:100%;margin-top:10px;}