@font-face {
  font-family: 'Gotham';
  src: url('fuentes/Gotham-Book.woff2') format('woff2'),
    url('fuentes/Gotham-Book.woff') format('woff');
  font-weight: normal;
  font-style: normal;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Gotham', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: linear-gradient(135deg, #f0f2f5 0%, #e4e7ec 100%);
  padding: 20px;
  color: #2d3748;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  max-width: 450px;
  width: 100%;
  margin: 0 auto;
  background: white;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
  overflow: hidden;
}

header {
  background: linear-gradient(135deg, #1a4f8b 0%, #2c5282 100%);
  color: white;
  padding: 25px 20px;
  text-align: center;
  position: relative;
}

header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #63b3ed, #4299e1, #3182ce);
}

h1 {
  font-size: 28px;
  margin-bottom: 0;
  font-weight: 600;
}

form {
  padding: 30px;
}

.form-group {
  margin-bottom: 22px;
}

label {
  display: block;
  margin-bottom: 10px;
  font-weight: 600;
  color: #2d3748;
  font-size: 15px;
}

input {
  width: 100%;
  padding: 14px;
  border: 1px solid #cbd5e0;
  border-radius: 8px;
  font-size: 16px;
  transition: all 0.3s ease;
}

input:focus {
  outline: none;
  border-color: #4299e1;
  box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.2);
}

.buttons {
  margin-top: 30px;
  display: flex;
  justify-content: center;
}

.btn-generate {
  background: #3182ce;
  color: white;
  width: 100%;
  max-width: 250px;
  padding: 14px 30px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
}

.btn-generate:hover {
  background: #2b6cb0;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.notification {
  margin: 20px 30px;
  padding: 15px;
  border-radius: 8px;
  background: #fee;
  border: 1px solid #fcc;
  text-align: center;
  font-weight: 500;
}