/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg: #0f172a;
  --color-card: #1e293b;
  --color-border: #334155;
  --color-muted: #94a3b8;
  --color-gold: #eab308;
  --color-green: #22c55e;
  --color-green-soft: #4ade80;
  --color-blue: #38bdf8;
  --color-purple: #a855f7;
  --color-red: #ef4444;
  --color-text: #f1f5f9;
  --radius: 8px;
}

body {
  font-family: Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  padding: 16px;
}

a { color: inherit; text-decoration: none; }

/* === LAYOUT === */
.wrap { max-width: 1200px; margin: 0 auto; }
.wrap-sm { max-width: 900px; margin: 0 auto; }
.wrap-xs { max-width: 400px; margin: 0 auto; }

/* === CARDS === */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 16px;
}
.card--gold { border-color: var(--color-gold); }
.card--purple { border-color: var(--color-purple); }

/* === TOP BAR === */
.top-bar {
  background: var(--color-card);
  border: 2px solid var(--color-gold);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.top-bar h1 { color: var(--color-gold); font-size: 1.5rem; }
.top-bar h2 { color: var(--color-blue); font-size: 1.1rem; }

/* === NAV BAR === */
.nav-bar {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px 20px;
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

/* === STATS BAR === */
.stats-bar {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
  margin-top: 12px;
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 12px;
}

/* === BUTTONS === */
.btn {
  display: inline-block;
  border: none;
  border-radius: var(--radius);
  padding: 8px 16px;
  font-weight: bold;
  cursor: pointer;
  font-size: 0.9rem;
  white-space: nowrap;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.85; }
.btn--gold   { background: var(--color-gold);   color: #000; }
.btn--green  { background: var(--color-green);  color: #fff; }
.btn--blue   { background: var(--color-blue);   color: #000; }
.btn--red    { background: var(--color-red);    color: #fff; }
.btn--purple { background: var(--color-purple); color: #fff; }
.btn--gray   { background: #475569;             color: #fff; }
.btn--full   { width: 100%; padding: 14px; font-size: 1.1rem; margin-top: 16px; }

/* === FORMS === */
input[type="text"],
input[type="number"],
input[type="password"],
input[type="date"],
select {
  width: 100%;
  padding: 10px 12px;
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid #475569;
  border-radius: var(--radius);
  font-size: 1rem;
}
input[type="file"] { padding: 8px; }
label { display: block; margin-bottom: 4px; font-weight: bold; font-size: 0.9rem; }
.form-group { display: flex; flex-direction: column; gap: 4px; margin-bottom: 14px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.error-msg { color: var(--color-red); font-size: 0.85rem; margin-top: 4px; }

/* === TABLES === */
table { width: 100%; border-collapse: collapse; margin-top: 12px; }
th, td { padding: 10px 12px; border-bottom: 1px solid var(--color-border); text-align: left; font-size: 0.9rem; }
th { color: var(--color-gold); }
.img-prod { width: 44px; height: 44px; object-fit: cover; border-radius: 6px; }

/* === POS LAYOUT === */
.pos-content { display: flex; gap: 16px; margin-top: 16px; }
.pos-catalog { flex: 1; min-width: 0; }
.pos-cart   { flex: 1; min-width: 0; }

/* === PRODUCT CARD === */
.product-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-bg);
  padding: 10px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  margin-bottom: 10px;
  gap: 10px;
}
.product-card img { width: 50px; height: 50px; object-fit: cover; border-radius: 6px; flex-shrink: 0; }
.product-info { flex: 1; min-width: 0; }
.product-info strong { display: block; font-size: 0.95rem; }
.product-price { color: var(--color-green-soft); font-weight: bold; }

/* === CART === */
#lbl-total { color: var(--color-green-soft); }
.cart-total { font-size: 1.4rem; font-weight: bold; text-align: right; margin-top: 16px; }

/* === LOGIN === */
.login-wrap { display: flex; justify-content: center; align-items: center; min-height: calc(100vh - 32px); }
.login-card {
  background: var(--color-card);
  border: 2px solid var(--color-gold);
  border-radius: 12px;
  padding: 36px 32px;
  width: 100%;
  max-width: 340px;
  text-align: center;
}
.login-card h2 { color: var(--color-gold); margin-bottom: 24px; font-size: 1.4rem; }
.login-error { background: rgba(239,68,68,0.15); border: 1px solid var(--color-red); border-radius: 6px; padding: 10px; margin-bottom: 14px; color: var(--color-red); font-size: 0.9rem; }

/* === ALERTS === */
.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 14px; font-size: 0.9rem; }
.alert--success { background: rgba(34,197,94,0.12); border: 1px solid var(--color-green); color: var(--color-green-soft); }
.alert--error   { background: rgba(239,68,68,0.12);  border: 1px solid var(--color-red);  color: var(--color-red); }

/* === INPUT INLINE TABLE (inventario) === */
.input-sm { width: 70px; padding: 4px 6px; background: var(--color-bg); color: var(--color-text); border: 1px solid #475569; border-radius: 4px; font-size: 0.85rem; }

/* === TRASPASOS PRODUCT ROW === */
.traspaso-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-bg);
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 8px;
  gap: 10px;
  flex-wrap: wrap;
}
.traspaso-qty { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

/* ========================================
   RESPONSIVE — MOBILE FIRST
   ======================================== */

/* Tablets y móviles (< 768px) */
@media (max-width: 768px) {
  body { padding: 12px; }

  .top-bar { flex-direction: column; align-items: flex-start; text-align: left; }
  .top-bar > div:last-child { align-self: flex-end; }

  .nav-bar { flex-direction: column; align-items: flex-start; gap: 8px; }

  .stats-bar { flex-direction: column; gap: 8px; }

  /* POS: stack catalog y cart verticalmente */
  .pos-content { flex-direction: column; }

  /* Tabla responsive: ocultar columnas menos importantes */
  .table-hide-mobile { display: none; }

  .form-grid { grid-template-columns: 1fr; }

  .btn { font-size: 0.85rem; padding: 8px 12px; }

  table { font-size: 0.82rem; }
  th, td { padding: 8px; }

  .login-card { padding: 24px 20px; }
}

/* Móviles pequeños (< 480px) */
@media (max-width: 480px) {
  .top-bar h1 { font-size: 1.2rem; }

  .product-card { flex-wrap: wrap; }
  .product-card .btn { width: 100%; margin-top: 6px; }

  .cart-total { font-size: 1.2rem; }
}