/* ==========================
   TEMA BASE
   ========================== */
:root {
  --color-principal: #f1c40f;
  --color-negro: #000;
  --color-fondo: #f5f6fa;
  --color-texto: #222;
  --color-blanco: #fff;
  --sombra: 0 3px 12px rgba(0,0,0,0.1);
  --radio: 14px;
  --transicion: all 0.3s ease;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background-color: var(--color-fondo);
  color: var(--color-texto);
  line-height: 1.6;
}

/* ==========================
   ENCABEZADO
   ========================== */
header {
  background: linear-gradient(135deg, var(--color-negro), #222);
  color: var(--color-principal);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  padding: 25px 10px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.3);
  position: sticky;
  top: 0;
  z-index: 10;
}

header img {
  width: 100px;
  height: auto;
  margin-right: 15px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.4));
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* ==========================
   SECCIONES
   ========================== */
section {
  max-width: 1200px;
  margin: 35px auto;
  background: var(--color-blanco);
  padding: 25px 30px;
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  transition: var(--transicion);
}

section:hover {
  transform: translateY(-2px);
}

section h2 {
  border-left: 6px solid var(--color-principal);
  padding-left: 10px;
  margin-bottom: 20px;
  font-size: 1.4rem;
  color: var(--color-negro);
}

/* ==========================
   FORMULARIO CLIENTE
   ========================== */
#formCliente {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
}

#formCliente label {
  font-weight: 600;
  color: var(--color-negro);
}

#formCliente input,
#formCliente select {
  width: 100%;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid #ccc;
  font-size: 15px;
  background: #fafafa;
  transition: var(--transicion);
}

/* Ajustes específicos para móviles: formulario de cliente en una sola columna */
@media (max-width: 600px) {
  #formCliente {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  section#cliente {
    margin: 20px 10px;
    padding: 20px 15px;
  }
  #formCliente label {
    margin-bottom: 2px;
  }
}

#formCliente input:focus,
#formCliente select:focus {
  border-color: var(--color-principal);
  background-color: #fff;
  box-shadow: 0 0 8px rgba(241, 196, 15, 0.5);
  outline: none;
}

/* ==========================
   BUSCADOR
   ========================== */
.busqueda {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 15px;
}

.busqueda input {
  flex: 1;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid #ccc;
  font-size: 15px;
  background: #fff;
  transition: var(--transicion);
}

.busqueda input:focus {
  border-color: var(--color-principal);
  box-shadow: 0 0 6px rgba(241,196,15,0.4);
}

/* ==========================
   GRID DE PRODUCTOS
   ========================== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 25px;
}

.producto {
  background: var(--color-blanco);
  border-radius: var(--radio);
  padding: 18px;
  text-align: center;
  box-shadow: var(--sombra);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 370px;
}

.producto:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.producto img {
  width: 100%;
  max-width: 200px;
  height: 150px;
  object-fit: contain;
  margin: 0 auto 10px;
  border-radius: 10px;
  background: #fff;
}

.producto h3 {
  font-size: 1.05rem;
  color: var(--color-negro);
  margin: 8px 0;
  min-height: 48px;
}

.producto p {
  margin: 4px 0;
  color: #444;
  font-size: 0.95rem;
}

.producto button {
  margin-top: 12px;
  background: var(--color-negro);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: bold;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transicion);
}

.producto button:hover {
  background: var(--color-principal);
  color: var(--color-negro);
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

/* ==========================
   TABLA DE COTIZACIÓN
   ========================== */
#tablaCotizacion {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

#tablaCotizacion th {
  background: var(--color-negro);
  color: var(--color-principal);
  padding: 12px;
  text-align: center;
  font-size: 0.95rem;
}

#tablaCotizacion td {
  padding: 12px;
  border-bottom: 1px solid #eee;
  text-align: center;
  font-size: 0.9rem;
}

#tablaCotizacion tr:hover {
  background-color: #fdf6e3;
}

#tablaCotizacion input,
#tablaCotizacion select {
  padding: 6px;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 0.85rem;
  background: #fafafa;
}

#tablaCotizacion button {
  background-color: #e74c3c;
  border: none;
  color: white;
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: var(--transicion);
}

#tablaCotizacion button:hover {
  background-color: #c0392b;
}

/* ==========================
   TOTAL + BOTÓN PDF
   ========================== */
#totalCotizacion {
  text-align: right;
  font-weight: bold;
  font-size: 1.1rem;
  margin-top: 25px;
}

#generarPDF {
  display: block;
  margin: 25px auto 0;
  background: var(--color-negro);
  color: #fff;
  padding: 14px 35px;
  border: none;
  border-radius: var(--radio);
  font-size: 1rem;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transicion);
}

#generarPDF:hover {
  background: var(--color-principal);
  color: var(--color-negro);
  box-shadow: 0 4px 10px rgba(0,0,0,0.25);
}

/* ==========================
   FOOTER
   ========================== */
footer {
  background: var(--color-negro);
  color: var(--color-principal);
  text-align: center;
  padding: 18px 10px;
  font-size: 0.95rem;
  margin-top: 50px;
  box-shadow: 0 -3px 10px rgba(0,0,0,0.2);
}

/* ==========================
   RESPONSIVE
   ========================== */
@media (max-width: 800px) {
  header {
    flex-direction: column;
    text-align: center;
  }

  header img {
    margin-right: 0;
    margin-bottom: 10px;
  }

  section {
    margin: 20px;
    padding: 18px;
  }

  #tablaCotizacion th,
  #tablaCotizacion td {
    font-size: 13px;
    padding: 8px;
  }
}

@media (max-width: 500px) {
  h1 {
    font-size: 1.3rem;
  }

  #formCliente {
    grid-template-columns: 1fr;
  }

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

  #generarPDF {
    width: 100%;
  }
}