:root {
  --primary-color: #4F46E5;
  --primary-hover: #4338CA;
  --background-color: #F5F5F5;
  --form-background: #FFFFFF;
  --text-color: #1F2937;
  --placeholder-color: #9CA3AF;
  --border-color: #E5E7EB;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --error-color: #EF4444;
  --success-color: #10B981;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  width: 100vw;
  max-width: 900px;
  padding: 16px;
}

h1 {
  text-transform: uppercase;
  font-size: 48px;
  margin-bottom: 40px;
  text-align: center;
  font-weight: 600;
  color: var(--text-color);
  margin-top: 16px;
}

p {
  text-align: center;
  font-size: 16px;
  font-weight: 200;
  margin-bottom: 8px;
  color: var(--text-color);
}

.button-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  border-radius: 16px;
  box-shadow: 0 4px 6px var(--shadow-color);
  padding : 16px;
}

.btn {
  display: inline-block;
  padding: 15px 30px;
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-size: 19px;
  transition: background-color 0.3s;
}

.btn-classic {
  background-color: #007bff;
}

.btn-classic:hover {
  background-color: #0056b3;
}

.btn-variant {
  background-color: #00dc33;
}

.btn-variant:hover {
  background-color: #009a33;
}

.btn-deco {
  background-color: #dc0000;
}
.btn-deco:hover {
  background-color: #b30000;
}

.btn-admin {
  background-color: #c9cb44;
}
.btn-admin:hover {
  background-color: #86862e;
}

.form {
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  background-color: var(--form-background);
  padding: 32px;
  border-radius: 16px;
  box-shadow: 0 4px 6px var(--shadow-color);
  position: relative;
}

.back-button {
  position: absolute;
  top: 32px;
  left: 32px;
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.back-button:hover {
  transform: translateX(-4px);
}

.form-group {
  margin-bottom: 20px;
}

input,
select,
textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 16px;
  color: var(--text-color);
  background-color: var(--form-background);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  font-family: inherit;
}

input::placeholder,
textarea::placeholder {
  color: var(--placeholder-color);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%239CA3AF'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 16px;
  padding-right: 40px;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.submit-button {
  width: 100%;
  padding: 16px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.submit-button:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.submit-button:active {
  transform: translateY(0);
}

.form-group.success input {
  border-color: var(--success-color);
}

.form-group.error input {
  border-color: var(--error-color);
}

.error-message {
  color: var(--error-color);
  font-size: 12px;
  margin-top: 4px;
  display: none;
}

.form-group.error .error-message {
  display: block;
}

@media (max-width: 480px) {
  .container {
    padding: 16px;
  }

  .form {
    padding: 24px;
    width: 100vw;
  }

  .back-button {
    top: 24px;
    left: 24px;
  }

  h1 {
    font-size: 32px;
  }

  input,
  select,
  textarea {
    font-size: 18px;
  }

  .submit-button {
    font-size: 18px;
    padding: 18px;
  }
}