:root {
  --bg: #f0f4f8;
  --card: #ffffff;
  --text: #222;
  --input: #f9f9f9;
  --primary: #00C9FF;
  --secondary: #1d4881;
  --border: #ccc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1e1e1e;
    --card: #2a2a2a;
    --text: #eee;
    --input: #3a3a3a;
    --border: #444;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
.form-container {
  background: var(--card);
  padding: 30px;
  border-radius: 20px;
  box-shadow: 10px 10px 30px rgba(0,0,0,0.1),
              -10px -10px 30px rgba(255,255,255,0.2);
  width: 100%;
  max-width: 400px;
}
h1 {
  text-align: center;
  margin-bottom: 25px;
}
.form-group {
  margin-bottom: 20px;
  position: relative;
}
.form-group i {
  position: absolute;
  left: 15px;
  top: 13px;
  color: var(--primary);
}
input, textarea {
  width: 100%;
  padding: 12px 12px 12px 40px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 16px;
  background: var(--input);
  color: var(--text);
}
input:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
}
textarea {
  resize: vertical;
  min-height: 100px;
}
.super-boton {
  display: inline-block;
  width: 100%;
  padding: 14px;
  background: linear-gradient(120deg, var(--primary), var(--secondary));
  border: none;
  border-radius: 50px;
  font-size: 16px;
  font-weight: bold;
  color: white;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-align: center;
  box-shadow: 0 8px 20px rgba(0,201,255,0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.super-boton:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 25px rgba(0,201,255,0.4);
}
.mensaje-css {
  display: none;
  margin-top: 15px;
  text-align: center;
  color: green;
  font-weight: bold;
  font-size: 14px;
}
p{
  color: #029210;
}