:root {
  --bg: #faf7f2;
  --card: #ffffff;
  --text: #1f1a14;
  --muted: #6b6157;
  --line: #e7e0d5;
  --accent: #25d366;      /* verde WhatsApp */
  --accent-dark: #1da851;
  --danger: #c0392b;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.4;
}

header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  padding: 16px;
  text-align: center;
}
header h1 {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: .5px;
}
header .sub {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: .9rem;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px;
}

section { margin-bottom: 24px; }
h2 {
  font-size: 1.1rem;
  margin: 0 0 12px;
}

/* ---------- Catálogo ---------- */
.producto {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}
.producto .info { flex: 1 1 180px; }
.producto h3 { margin: 0 0 4px; font-size: 1.05rem; }
.producto .precio { margin: 0; color: var(--muted); font-size: .9rem; }
.producto .acciones {
  display: flex;
  gap: 8px;
  align-items: center;
}
.producto .cantidad {
  width: 80px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 1rem;
  text-align: center;
  background: #fff;
}
.producto .unidad {
  font-size: .9rem;
  color: var(--muted);
}
.agregar {
  background: var(--accent);
  color: #fff;
  border: 0;
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}
.agregar:hover { background: var(--accent-dark); }

/* ---------- Carrito ---------- */
#carrito {
  list-style: none;
  padding: 0;
  margin: 0 0 8px;
}
#carrito .vacio {
  color: var(--muted);
  padding: 8px 0;
  font-size: .95rem;
}
#carrito .item {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 10px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}
#carrito .desc { font-size: .95rem; }
#carrito .sub  { font-weight: 600; }
.quitar {
  background: transparent;
  border: 0;
  color: var(--danger);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px 8px;
}
.total-linea {
  margin: 12px 0;
  text-align: right;
}

/* ---------- Formulario ---------- */
#checkout {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
}
#checkout label {
  display: block;
  margin-bottom: 10px;
  font-size: .9rem;
  color: var(--muted);
}
#checkout input,
#checkout textarea {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
#checkout textarea { resize: vertical; }

.aviso {
  background: #fff8e1;
  border: 1px solid #f2d97b;
  color: #6b5310;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: .88rem;
  margin: 12px 0;
}

#btn-enviar {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: 0;
  padding: 14px;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 10px;
  cursor: pointer;
}
#btn-enviar:hover { background: var(--accent-dark); }
#btn-enviar:disabled {
  opacity: .7;
  cursor: not-allowed;
}