:root {
  --primary: #0d6efd;
  --success: #22c55e;
  --bg: #f4f6f9;
  --card: #ffffff;
  --border: #e5e7eb;
  --text: #0f172a;
  --muted: #64748b;
  --shadow: 0 10px 30px rgba(0,0,0,.08);
}

/* RESET */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
}

/* HEADER */
.header {
  background: #fff;
  box-shadow: var(--shadow);
}

.header-container {
  max-width: 1200px;
  margin: auto;
  padding: 14px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  width: 50px;
}

.logo-container {
  display: flex;
  gap: 14px;
  align-items: center;
}

.texto-logo h1 {
  font-size: 1rem;
  color: var(--primary);
}

.texto-logo h2,
.texto-logo p {
  font-size: .8rem;
  color: var(--muted);
}

.nav a {
  margin-right: 16px;
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
}

/* MAIN */
main {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 15px;
}

main h2 {
  text-align: center;
  margin-bottom: 30px;
  color: var(--primary);
}

/* CARD BASE */
.card {
  background: var(--card);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 25px;
}

/* CARRITO ITEMS */
.carrito-item {
  background: #f9fafb;
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 15px;
  border: 1px solid var(--border);
}

.carrito-item h3 {
  font-size: .95rem;
  margin-bottom: 6px;
}

.carrito-item p {
  font-size: .85rem;
  color: var(--muted);
}

.carrito-item button {
  background: #e5e7eb;
  border: none;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
  margin: 0 4px;
}

.carrito-item .remove {
  background: #fee2e2;
  color: #b91c1c;
  margin-top: 10px;
}

/* TOTAL */
.total {
  text-align: right;
  font-size: 1.1rem;
  font-weight: 600;
}

#total,
#factura-total {
  color: var(--success);
  font-size: 1.3rem;
}

/* FACTURA */
.factura {
  background: #f8fafc;
  border-radius: 18px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.factura h3 {
  margin-bottom: 15px;
  color: var(--primary);
}

.factura-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px dashed #cbd5e1;
  font-size: .9rem;
}

/* FORM */
#checkout-form {
  background: var(--card);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow);
}

#checkout-form h3 {
  margin-bottom: 15px;
}

#checkout-form input,
#checkout-form textarea {
  width: 100%;
  padding: 14px;
  margin-bottom: 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #f9fafb;
}

#checkout-form::after {
  content: "🔒 Pago 100% seguro • Datos protegidos";
  display: block;
  margin-top: 12px;
  text-align: center;
  font-size: .8rem;
  color: var(--muted);
}

/* PAYPAL */
#paypal-button-container {
  margin-top: 30px;
  background: var(--card);
  padding: 22px;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

/* CONFIRMACION */
.confirmacion {
  display: none;
  background: linear-gradient(180deg, #ecfdf5, #f0fdf4);
  border-radius: 18px;
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
}

.checkmark {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--success);
  color: white;
  font-size: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: auto;
}

/* FOOTER */
.footer {
  background: #020617;
  color: #cbd5f5;
  text-align: center;
  padding: 25px;
  font-size: .85rem;
  margin-top: 50px;
}

/* DARK MODE */
body.dark {
  background: #020617;
  color: #e5e7eb;
}

body.dark .card,
body.dark .factura,
body.dark #checkout-form,
body.dark #paypal-button-container {
  background: #020617;
  color: #e5e7eb;
}
/* PASOS */
.steps {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 35px;
}

.step {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: #e5e7eb;
  color: #475569;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  transition: .4s;
}

.step span {
  font-size: .7rem;
}

.step.active {
  background: linear-gradient(135deg, #0d6efd, #22c55e);
  color: white;
  transform: scale(1.1);
}

/* SECCIONES */
.checkout-step {
  display: none;
  animation: fade .6s ease;
}

.checkout-step.active {
  display: block;
}

@keyframes fade {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* BOTON */
.btn-next {
  width: 100%;
  padding: 15px;
  border: none;
  border-radius: 14px;
  background: linear-gradient(135deg, #0d6efd, #22c55e);
  color: white;
  font-size: 1rem;
  cursor: pointer;
  transition: .3s;
}

.btn-next:hover {
  transform: translateY(-2px);
}

/* PAYPAL BLOQUEADO */
#paypal-button-container.disabled {
  pointer-events: none;
  opacity: .4;
  position: relative;
}

.bloqueo {
  text-align: center;
  font-size: .85rem;
  color: #64748b;
}