:root{
  --bg:#f3f6f9;
  --surface:#ffffff;
  --surface-soft:#f8fafc;
  --ink:#111827;
  --muted:#64748b;
  --line:#d8e0ea;
  --line-strong:#c8d2df;
  --primary:#0f766e;
  --primary-strong:#0b5f59;
  --primary-soft:#e6f6f4;
  --blue:#2563eb;
  --danger:#b91c1c;
  --warning:#b45309;
  --shadow:0 18px 45px rgba(15,23,42,.08);
}
*{box-sizing:border-box}
body{
  margin:0;
  min-height:100vh;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Arial,sans-serif;
  background:linear-gradient(180deg,#f6f8fb 0,#edf2f7 48%,#f8fafc 100%);
  color:var(--ink);
}
button,input,select{font:inherit}
button{
  border:0;
  border-radius:10px;
  padding:12px 15px;
  font-weight:800;
  background:var(--primary);
  color:#fff;
  cursor:pointer;
  box-shadow:none;
}
button:hover{background:var(--primary-strong)}
button:disabled{opacity:.45;cursor:not-allowed}
.hidden{display:none!important}

.login-wrap{
  min-height:100vh;
  display:grid;
  align-content:center;
  gap:18px;
  padding:30px;
}
.login-shell{
  width:min(1120px,100%);
  margin:0 auto;
  display:grid;
  grid-template-columns:1.15fr .85fr;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:14px;
  box-shadow:0 24px 70px rgba(15,23,42,.12);
  overflow:hidden;
}
.login-copy{
  min-height:560px;
  padding:54px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  background:
    linear-gradient(135deg,rgba(9,47,57,.96),rgba(13,74,71,.95) 52%,rgba(15,23,42,.98)),
    repeating-linear-gradient(90deg,rgba(255,255,255,.07) 0 1px,transparent 1px 64px);
  color:#fff;
}
.brand-mark{
  width:max-content;
  border:1px solid rgba(255,255,255,.22);
  border-radius:8px;
  padding:9px 12px;
  font-size:12px;
  font-weight:900;
  letter-spacing:.12em;
  text-transform:uppercase;
}
.login-copy h1{
  margin:22px 0 12px;
  max-width:620px;
  font-size:42px;
  line-height:1.05;
  letter-spacing:0;
}
.login-copy p{
  max-width:560px;
  margin:0;
  color:#d9e7ee;
  font-size:17px;
  line-height:1.55;
}
.login-highlights{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:30px;
}
.login-highlights span{
  border:1px solid rgba(255,255,255,.22);
  border-radius:8px;
  padding:9px 12px;
  color:#e0f2fe;
  font-weight:800;
  font-size:13px;
  background:rgba(255,255,255,.06);
}
.login-proof{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:12px;
  margin-top:34px;
  max-width:660px;
}
.login-proof article{
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.08);
  border-radius:12px;
  padding:14px;
}
.login-proof strong{
  display:block;
  font-size:17px;
  margin-bottom:5px;
}
.login-proof span{
  color:#cbdce5;
  font-size:12px;
  line-height:1.35;
}
.login-card{
  padding:48px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  background:var(--surface);
}
.login-card-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  margin-bottom:8px;
}
.login-card-top span{
  color:#0f766e;
  background:var(--primary-soft);
  border:1px solid #b7ded9;
  border-radius:999px;
  padding:8px 10px;
  font-size:12px;
  font-weight:850;
}
.logo{
  width:52px;
  height:52px;
  border-radius:12px;
  background:#0f766e;
  border:1px solid #0b5f59;
  color:#fff;
  display:grid;
  place-items:center;
  font-weight:950;
}
.login-card h2{margin:14px 0 4px;font-size:30px;letter-spacing:0}
.login-card p{margin:0 0 18px;color:var(--muted)}
.login-card label{
  display:block;
  margin:14px 0;
  color:#334155;
  font-size:14px;
  font-weight:750;
}
.login-card input,.app input,.app select{
  width:100%;
  margin-top:7px;
  padding:13px 14px;
  border-radius:8px;
  border:1px solid var(--line-strong);
  background:#fff;
  color:var(--ink);
  outline:none;
}
.login-card input:focus,.app input:focus,.app select:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 4px rgba(15,118,110,.11);
}
.login-card button{width:100%;margin-top:10px;padding:14px 15px}
.login-card small{display:block;color:var(--danger);margin-top:12px;min-height:18px}
.login-footnote{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  padding-top:18px;
  margin-top:8px;
  border-top:1px solid var(--line);
}
.login-footnote span{
  color:#475569;
  background:#f8fafc;
  border:1px solid var(--line);
  border-radius:999px;
  padding:8px 10px;
  font-size:12px;
  font-weight:800;
}
.legal-bases{
  width:min(1120px,100%);
  margin:0 auto;
  display:grid;
  grid-template-columns:260px 1fr;
  gap:22px;
  padding:22px 24px;
  background:rgba(255,255,255,.9);
  border:1px solid var(--line);
  border-radius:14px;
  color:#334155;
  box-shadow:0 12px 34px rgba(15,23,42,.06);
}
.legal-bases h2{margin:0;font-size:18px;line-height:1.25}
.legal-bases div{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.legal-bases p{margin:0;font-size:13px;line-height:1.45;color:#475569}
.legal-bases b{color:#0f172a}

.app{max-width:1220px;margin:0 auto;padding:22px;position:relative}
.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  margin-bottom:16px;
  padding:18px 20px;
  border:1px solid var(--line);
  border-radius:16px;
  background:var(--surface);
  box-shadow:0 10px 24px rgba(15,23,42,.05);
}
.topbar:before{
  content:"Flow Stock";
  font-weight:950;
  color:var(--primary);
  letter-spacing:.12em;
  font-size:11px;
  text-transform:uppercase;
  margin-right:8px;
}
.topbar h1{margin:0;font-size:28px;letter-spacing:0}
.topbar p{margin:3px 0 0;color:var(--muted)}
.ghost{
  background:#fff;
  color:#334155;
  border:1px solid var(--line-strong);
}
.ghost:hover{background:var(--surface-soft)}
.top-actions{display:flex;align-items:center;gap:10px}
.top-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:43px;
  padding:10px 14px;
  border-radius:10px;
  text-decoration:none;
  font-weight:800;
}
.blue{background:var(--blue);color:#fff}
.blue:hover{background:#1d4ed8}

.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:16px}
.metrics article{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:14px;
  padding:16px;
  box-shadow:0 8px 20px rgba(15,23,42,.04);
}
.metrics strong{font-size:25px;display:block;letter-spacing:0}
.metrics span{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.ops-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:10px;
  margin:-4px 0 16px;
  padding:12px;
  border:1px solid var(--line);
  border-radius:14px;
  background:#fff;
  box-shadow:0 8px 20px rgba(15,23,42,.04);
}
.ops-strip article{
  min-width:0;
  padding:11px 12px;
  border:1px solid #e7edf4;
  border-radius:10px;
  background:#fbfdff;
}
.ops-strip span{
  display:block;
  color:#64748b;
  font-size:11px;
  font-weight:850;
  letter-spacing:.06em;
  text-transform:uppercase;
}
.ops-strip strong{
  display:block;
  margin-top:4px;
  font-size:17px;
  color:#0f172a;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.tab{
  background:#fff;
  color:#475569;
  border:1px solid var(--line);
  border-radius:999px;
  padding:10px 14px;
}
.tab.active{
  color:#fff;
  background:var(--primary);
  border-color:var(--primary);
}
.view{display:grid;grid-template-columns:1.12fr .88fr;gap:16px}
.panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:16px;
  padding:18px;
  box-shadow:0 10px 28px rgba(15,23,42,.05);
}
.hero-panel{min-height:520px}
.side-panel{align-self:start}
.panel-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}
.panel h2{font-size:19px;margin:0;letter-spacing:0}
.panel-head p{margin:4px 0 0;color:var(--muted);font-size:13px}
.search-wrap{position:relative}
.search-wrap span{position:absolute;left:15px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:22px}
.search-wrap input{padding-left:44px;margin-top:0}
.list{display:grid;gap:10px;margin-top:13px}
.product{
  display:grid;
  grid-template-columns:1fr auto auto;
  gap:12px;
  align-items:center;
  background:var(--surface-soft);
  border:1px solid var(--line);
  border-radius:12px;
  padding:13px;
}
.product:hover{border-color:#9ccfc9}
.product b{display:block;font-size:15px}
.product small,.sale small,.note{color:var(--muted);line-height:1.4}
.stock{font-weight:950;padding:7px 10px;border-radius:999px;background:#edf2f7}
.ok{color:#047857}.low{color:var(--warning)}.bad{color:var(--danger)}
.alerts{display:grid;gap:8px;margin-top:12px}
.alert{border:1px solid #f1c27d;background:#fff7ed;color:#92400e;border-radius:12px;padding:12px}
.sales{display:grid;gap:8px;max-height:440px;overflow:auto}
.sale{display:flex;justify-content:space-between;gap:10px;padding:12px 0;border-bottom:1px solid var(--line)}
.money{color:var(--primary-strong)}
.product-form{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.product-form button{grid-column:1/-1}
.form-actions{grid-column:1/-1;display:flex;gap:10px}
.form-actions button{flex:1}
.close-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:18px 0}
.close-grid div{background:var(--surface-soft);border:1px solid var(--line);border-radius:12px;padding:14px}
.close-grid span{display:block;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.07em}
.close-grid strong{font-size:24px}

.scanner-form{display:grid;grid-template-columns:1.4fr .6fr auto;gap:10px;align-items:end}
.scanner-form label{color:#334155;font-size:13px;font-weight:750}
.scanner-form input{font-size:22px;font-weight:850;letter-spacing:.04em}
.scanner-status{
  margin-top:14px;
  padding:14px;
  border-radius:12px;
  border:1px solid #b6d8e6;
  background:#eff8fb;
  color:#0c4a6e;
  font-weight:800;
}
.scanner-status.ok{border-color:#9dd5c8;background:#ecfdf5;color:#065f46}
.scanner-status.warn{border-color:#f3c275;background:#fffbeb;color:#92400e}
.scanner-status.bad{border-color:#f3aaa7;background:#fef2f2;color:#991b1b}
.scanner-create{margin-top:14px;padding:14px;border:1px dashed #8fc9c2;border-radius:14px;background:#f7fcfb}
.scanner-create h3{margin:0 0 4px}
.scanner-panel:focus-within{border-color:#8fc9c2}
.export-actions{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:16px 0}
.export-actions a{
  display:block;
  text-decoration:none;
  text-align:center;
  border-radius:10px;
  padding:12px 14px;
  font-weight:850;
  background:#fff;
  border:1px solid var(--line-strong);
  color:#0f766e;
}
.export-actions a:hover{border-color:var(--primary);background:var(--primary-soft)}
.sale-scanner{grid-template-columns:1fr auto;margin:12px 0}
.cart-summary{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:12px}
.cart-summary div{background:var(--surface-soft);border:1px solid var(--line);border-radius:12px;padding:12px}
.cart-summary span{display:block;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.07em}
.cart-summary strong{font-size:24px}
.cart-row{display:grid;grid-template-columns:1fr auto auto;gap:10px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}
.cart-row small{display:block;color:var(--muted);line-height:1.4}
.cart-qty{display:flex;align-items:center;gap:7px}
.cart-qty button{width:32px;height:32px;padding:0;border-radius:8px}
.cart-qty span{min-width:22px;text-align:center;font-weight:900}
.cart-actions{display:grid;grid-template-columns:1fr auto;gap:10px;margin-top:14px}
.mode-toggle,.payment-toggle{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.mode-toggle label,.payment-toggle label{
  display:flex;
  align-items:center;
  gap:8px;
  border:1px solid var(--line);
  background:#fff;
  border-radius:999px;
  padding:10px 13px;
  color:#334155;
  font-weight:800;
}
.mode-toggle input,.payment-toggle input{width:auto;margin:0}
.payment-toggle{margin-top:0}
.payment-toggle label{flex:1;justify-content:center;min-width:130px}
.category-select{width:100%;margin-top:10px}
.product-form .category-select{margin-top:0}
.category-form{display:grid;grid-template-columns:1fr auto;gap:10px}
.category-list{display:grid;gap:8px;margin-top:12px}
.category-chip{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--line)}
.category-chip span{font-weight:850}
.category-chip small{display:block;color:var(--muted);font-weight:500}
.danger{
  background:#fff;
  border:1px solid #f1aaaa;
  color:var(--danger);
}
.danger:hover{background:#fef2f2}
.form-note{
  grid-column:1/-1;
  color:#065f46;
  background:#ecfdf5;
  border:1px solid #a7d8ca;
  border-radius:10px;
  padding:11px 12px;
}
.inventory-panel{grid-column:1/-1}
.inventory-row{grid-template-columns:minmax(0,1fr) auto auto auto}
.row-actions{display:flex;align-items:center;gap:8px}
.row-actions button{padding:10px 12px}

@media(max-width:850px){
  .login-wrap{padding:14px}
  .login-shell,.legal-bases{grid-template-columns:1fr}
  .login-copy{min-height:auto;padding:28px}
  .login-copy h1{font-size:30px}
  .login-card{padding:26px}
  .legal-bases div{grid-template-columns:1fr}
  .app{padding:12px}
  .metrics,.ops-strip,.view,.close-grid{grid-template-columns:1fr}
  .product{grid-template-columns:1fr auto}
  .product button{grid-column:1/-1}
  .product-form{grid-template-columns:1fr}
  .panel-head{align-items:flex-start;flex-direction:column}
  .panel-head button{width:100%}
  .topbar h1{font-size:23px}
  .metrics strong{font-size:22px}
  .hero-panel{min-height:auto}
  .scanner-form,.sale-scanner,.cart-row,.cart-actions,.category-form,.inventory-row{grid-template-columns:1fr}
  .scanner-form button,.category-form button,.inventory-row button{width:100%}
  .row-actions,.form-actions{flex-direction:column}
  .export-actions{grid-template-columns:1fr}
  .cart-summary{grid-template-columns:1fr 1fr}
}