/* Основные стили */
:root {
  --primary: #4361ee;
  --primary-light: #4895ef;
  --secondary: #3f37c9;
  --dark: #1b263b;
  --light: #f8f9fa;
  --success: #4cc9f0;
  --error: #f72585;
  --radius: 12px;
  --shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Montserrat', sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  color: var(--dark);
  line-height: 1.6;
}

/* Контейнер формы */
.registration-container {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 500px;
  overflow: hidden;
  transition: var(--transition);
}

/* Шапка */
.header {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  padding: 25px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.header::after {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 200%;
  background: rgba(255, 255, 255, 0.1);
  transform: rotate(30deg);
  pointer-events: none;
}

.header h2 {
  font-weight: 700;
  font-size: 1.8rem;
  margin-bottom: 5px;
  position: relative;
  z-index: 1;
}

/* Основное содержимое */
.content {
  padding: 30px;
}

/* Форма */
.form-block {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label {
  font-weight: 600;
  color: var(--dark);
  font-size: 0.95rem;
}

input[type="text"],
input[type="password"] {
  padding: 15px;
  border: 2px solid #e9ecef;
  border-radius: var(--radius);
  font-size: 1rem;
  transition: var(--transition);
  width: 100%;
}

input[type="text"]:focus,
input[type="password"]:focus {
  border-color: var(--primary-light);
  outline: none;
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

/* Кнопки */
input[type="submit"] {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  color: white;
  border: none;
  padding: 15px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 10px;
}

input[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(67, 97, 238, 0.3);
}

input[type="submit"]:active {
  transform: translateY(0);
}

/* Информация о студенте */
.student-info {
  background: var(--light);
  padding: 20px;
  border-radius: var(--radius);
  margin-bottom: 25px;
  border-left: 4px solid var(--primary);
}

.student-info p {
  margin-bottom: 10px;
}

.student-info p:last-child {
  margin-bottom: 0;
}

.student-info strong {
  color: var(--secondary);
}

/* Сообщения */
.message {
  padding: 15px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-weight: 500;
  text-align: center;
}

.message.success {
  background-color: rgba(76, 201, 240, 0.2);
  color: var(--success);
  border-left: 4px solid var(--success);
}

.message.error {
  background-color: rgba(247, 37, 133, 0.1);
  color: var(--error);
  border-left: 4px solid var(--error);
}

/* Адаптивность */
@media (max-width: 576px) {
  .header {
    padding: 20px;
  }
  
  .header h2 {
    font-size: 1.5rem;
  }
  
  .content {
    padding: 20px;
  }
  
  input[type="text"],
  input[type="password"],
  input[type="submit"] {
    padding: 12px;
  }
}

/* Анимации */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.registration-container {
  animation: fadeIn 0.5s ease-out;
}

.form-group {
  animation: fadeIn 0.6s ease-out;
}

/* Дополнительные эффекты */
input[type="text"]:hover,
input[type="password"]:hover {
  border-color: var(--primary);
}