:root {
  --mtn-azul-oscuro: #051f45;   /* navy del header/nav del sitio real */
  --mtn-azul: #0c3498;          /* azul de marca (logo, textos, enlaces) */
  --mtn-azul-medio: #00227a;    /* hover / estados intermedios */
  --mtn-dorado: #fcca2b;        /* color de acento (botones "Contactar" del sitio real) */
  --mtn-dorado-oscuro: #e0ad00;
  --mtn-rojo: #c1121f;          /* reservado para peligro/vencido, no es color de marca */
  --mtn-gris: #f4f6f8;
  --mtn-borde: #dde3ea;
  --mtn-sombra: 0 1px 3px rgba(5, 31, 69, 0.08), 0 1px 2px rgba(5, 31, 69, 0.06);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Montserrat", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--mtn-gris);
  color: #1c1c1c;
}
h1, h2, h3, .mtn-header-marca, button, .mtn-btn {
  font-family: "Poppins", "Montserrat", sans-serif;
}
h1 { color: var(--mtn-azul); font-size: 26px; margin-top: 0; }

/* --- Header / navegación --- */
.mtn-header {
  background: var(--mtn-azul-oscuro);
  color: #fff;
  padding: 12px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}
.mtn-header-logo { display: flex; align-items: center; gap: 10px; }
.mtn-header-logo img { height: 34px; display: block; }
.mtn-header-logo span {
  font-size: 13px;
  color: #cfd9ec;
  border-left: 1px solid rgba(255, 255, 255, 0.25);
  padding-left: 10px;
  letter-spacing: 0.3px;
}
.mtn-nav a {
  color: #e7ecf6;
  text-decoration: none;
  margin-left: 16px;
  font-size: 14px;
  font-weight: 500;
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.mtn-nav a:hover { color: #fff; border-bottom-color: var(--mtn-dorado); }

.mtn-main { max-width: 1100px; margin: 0 auto; padding: 24px 20px; }

/* --- Login --- */
.mtn-caja-login {
  max-width: 380px;
  margin: 60px auto;
  background: #fff;
  padding: 28px;
  border-radius: 10px;
  box-shadow: var(--mtn-sombra);
  border: 1px solid var(--mtn-borde);
}
.mtn-caja-login h1 { font-size: 22px; }
.mtn-caja-login form, .mtn-form-caja form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.mtn-form-caja form label, .mtn-caja-login label {
  display: flex;
  flex-direction: column;
  font-size: 13px;
  font-weight: 500;
  color: #3a4453;
  gap: 5px;
}
input, select, button {
  font: inherit;
  padding: 9px 10px;
  border: 1px solid var(--mtn-borde);
  border-radius: 6px;
}
input:focus, select:focus {
  outline: none;
  border-color: var(--mtn-azul);
  box-shadow: 0 0 0 3px rgba(12, 52, 152, 0.12);
}

/* --- Botones --- */
button[type="submit"], .mtn-btn {
  background: var(--mtn-dorado);
  color: var(--mtn-azul-oscuro);
  border: none;
  cursor: pointer;
  padding: 10px 16px;
  font-weight: 700;
  letter-spacing: 0.2px;
  border-radius: 6px;
  transition: background 0.15s ease;
}
button[type="submit"]:hover, .mtn-btn:hover { background: var(--mtn-dorado-oscuro); }
.mtn-btn-secundario {
  background: #fff;
  color: var(--mtn-azul);
  border: 1px solid var(--mtn-azul);
}
.mtn-btn-secundario:hover { background: #eef2fb; }
.mtn-btn-peligro { background: var(--mtn-rojo); color: #fff; border: none; cursor: pointer; }
.mtn-btn-peligro:hover { background: #9e0e19; }

.mtn-form-caja {
  background: #fff;
  border: 1px solid var(--mtn-borde);
  border-radius: 8px;
  box-shadow: var(--mtn-sombra);
  padding: 16px 18px;
  margin-bottom: 20px;
}

/* --- Tabla --- */
.mtn-tabla { width: 100%; border-collapse: collapse; background: #fff; border-radius: 8px; overflow: hidden; box-shadow: var(--mtn-sombra); }
.mtn-tabla th, .mtn-tabla td {
  border-bottom: 1px solid var(--mtn-borde);
  padding: 10px 12px;
  text-align: left;
  font-size: 14px;
  vertical-align: top;
}
.mtn-tabla th { background: var(--mtn-azul-oscuro); color: #fff; font-weight: 600; }
.mtn-tabla tr:last-child td { border-bottom: none; }
.mtn-tabla tr:hover td { background: #f7f9fc; }

/* --- Tarjetas resumen (dashboard) --- */
.mtn-resumen { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 22px; }
.mtn-tarjeta {
  flex: 1 1 160px;
  background: #fff;
  border: 1px solid var(--mtn-borde);
  border-radius: 10px;
  box-shadow: var(--mtn-sombra);
  padding: 16px;
  text-align: center;
  font-size: 13px;
  color: #4a5568;
}
.mtn-tarjeta span { font-size: 28px; font-weight: 700; display: block; margin-top: 6px; color: var(--mtn-azul-oscuro); }
.mtn-ok { border-top: 4px solid #2e8b57; }
.mtn-alerta { border-top: 4px solid var(--mtn-dorado-oscuro); }
.mtn-vencido { border-top: 4px solid var(--mtn-rojo); }
.mtn-gris { border-top: 4px solid #9aa5b1; }

/* --- Estados / badges --- */
.mtn-badge { padding: 4px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; color: #fff; display: inline-block; }
.mtn-badge-al_dia { background: #2e8b57; }
.mtn-badge-por_vencer { background: var(--mtn-dorado); color: var(--mtn-azul-oscuro); }
.mtn-badge-vencido { background: var(--mtn-rojo); }
.mtn-badge-sin_registro { background: #9aa5b1; }

.mtn-error { color: var(--mtn-rojo); font-weight: bold; }
.mtn-ok-msg { color: #2e8b57; font-weight: bold; }
.mtn-ayuda { font-size: 13px; color: #55606b; }
.mtn-footer { text-align: center; padding: 18px; font-size: 12px; color: #78828d; }

@media (max-width: 600px) {
  .mtn-header { padding: 10px 16px; }
  .mtn-header-logo img { height: 28px; }
  .mtn-nav a { margin-left: 10px; font-size: 13px; }
  .mtn-tabla, .mtn-tabla thead, .mtn-tabla tbody, .mtn-tabla th, .mtn-tabla td, .mtn-tabla tr { display: block; }
  .mtn-tabla thead { display: none; }
  .mtn-tabla tr { margin-bottom: 12px; border: 1px solid var(--mtn-borde); border-radius: 6px; padding: 8px; box-shadow: var(--mtn-sombra); }
  .mtn-tabla td { border: none; padding: 5px 0; }
}