* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.container {
  background: white;
  border-radius: 8px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  padding: 2rem;
  max-width: 500px;
  width: 100%;
}

h1 {
  color: #333;
  margin-bottom: 1.5rem;
  text-align: center;
  font-size: 1.75rem;
}

#encryptorForm,
#decryptorForm {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

label {
  font-weight: 600;
  color: #555;
  font-size: 0.95rem;
}

textarea,
input[type="password"] {
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

textarea:focus,
input[type="password"]:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea {
  resize: vertical;
  min-height: 120px;
  font-family: 'Courier New', monospace;
}

.btn-encrypt {
  padding: 0.75rem 1.5rem;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-encrypt:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-encrypt:active {
  transform: translateY(0);
}

.alert {
  padding: 1rem;
  border-radius: 4px;
  margin-top: 1rem;
  font-weight: 500;
}

.alert-error {
  background-color: #fee;
  color: #c33;
  border: 1px solid #fcc;
}

.result-section {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid #ddd;
}

.result-section label {
  display: block;
  margin-bottom: 0.75rem;
  color: #333;
}

.result-box {
  background-color: #f5f5f5;
  padding: 1rem;
  border-radius: 4px;
  border: 1px solid #ddd;
  margin-bottom: 1rem;
  word-break: break-all;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  max-height: 200px;
  overflow-y: auto;
  color: #333;
}

.btn-copy {
  padding: 0.5rem 1rem;
  background-color: #28a745;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-copy:hover {
  background-color: #218838;
}

.btn-copy:active {
  background-color: #1e7e34;
}

.link-section {
  margin-top: 1.5rem;
  text-align: center;
}

.link-decrypt,
.link-back {
  color: #667eea;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.link-decrypt:hover,
.link-back:hover {
  color: #764ba2;
  text-decoration: underline;
}