:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --ink: #10213f;
  --muted: #64748b;
  --line: #dbe3ef;
  --yellow: #f7c948;
  --blue: #17386b;
  --danger: #b42318;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); }
button, input, select { font: inherit; }
button { cursor: pointer; }

.topbar { background: var(--ink); color: white; padding: 14px 18px; }
.topbar-inner { max-width: 980px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 1.1rem; font-weight: 800; }
.brand-mark { width: 34px; height: 34px; border-radius: 9px; background: var(--yellow); display: grid; place-items: center; color: var(--ink); }
.shared { color: #cbd5e1; font-size: .95rem; }

.workspace { max-width: 980px; margin: 0 auto; padding: 28px 18px 44px; }
.heading { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 18px; }
.eyebrow { margin: 0 0 6px; color: var(--blue); font-size: .75rem; font-weight: 800; letter-spacing: .08em; }
h1 { margin: 0; font-size: clamp(2rem, 4vw, 3.6rem); line-height: .95; }
.intro { margin: 10px 0 0; color: var(--muted); }

.primary, .secondary, .danger, .icon, .quantity {
  border: 0;
  border-radius: 8px;
  min-height: 42px;
}
.primary { background: var(--yellow); color: var(--ink); font-weight: 800; padding: 0 16px; }
.secondary { background: #e9eef7; color: var(--ink); padding: 0 14px; }
.danger { background: var(--danger); color: white; padding: 0 14px; }
.primary:disabled, .secondary:disabled, .danger:disabled, .icon:disabled { opacity: .55; cursor: not-allowed; }

.meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 18px 0; color: var(--muted); }
.status { min-height: 24px; }
.error { background: #fff3f0; border: 1px solid #ffc9c1; color: var(--danger); padding: 12px 14px; border-radius: 8px; margin: 12px 0; }

.login { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card { width: min(420px, 100%); background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 24px; box-shadow: 0 18px 50px #10213f18; }
.login-card h1 { font-size: 2.2rem; }
.login-card label, .form label { display: grid; gap: 7px; font-weight: 700; }
input, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 42px;
  padding: 0 12px;
  background: white;
  color: var(--ink);
}

.empty { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 32px; text-align: center; }
.groups { display: grid; gap: 18px; }
.category { display: grid; gap: 10px; }
.category-head { display: flex; align-items: center; gap: 9px; }
.category-head h2 { margin: 0; font-size: 1.15rem; }
.count { color: var(--muted); }
.list { display: grid; gap: 9px; }
.row {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 12px;
}
.row.zero { opacity: .72; }
.product h3 { margin: 0 0 3px; font-size: 1rem; }
.product span { color: var(--muted); font-size: .9rem; }
.controls { display: flex; align-items: center; gap: 6px; }
.icon { width: 42px; background: #e9eef7; color: var(--ink); }
.quantity { min-width: 76px; padding: 0 10px; background: #f8fafc; color: var(--ink); font-weight: 800; border: 1px solid var(--line); }
.actions { display: flex; gap: 6px; }

.modal {
  position: fixed;
  inset: 0;
  background: #10213f80;
  display: none;
  place-items: center;
  padding: 18px;
}
.modal.open { display: grid; }
.dialog { width: min(480px, 100%); background: white; border-radius: 10px; padding: 20px; }
.dialog-head { display: flex; justify-content: space-between; gap: 12px; }
.dialog h2 { margin: 0; }
.form { display: grid; gap: 13px; margin-top: 16px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.hint { margin: 0; color: var(--muted); font-size: .9rem; }
.form-actions { display: flex; justify-content: end; gap: 8px; margin-top: 4px; }

@media (max-width: 700px) {
  .heading, .meta, .topbar-inner { align-items: stretch; flex-direction: column; }
  .row { grid-template-columns: 1fr; }
  .controls, .actions { justify-content: space-between; }
  .form-grid { grid-template-columns: 1fr; }
}