:root {
  --primary-color: #007bff;
  --primary-color-hover: #0056b3;
  --success-color: #28a745;
  --error-color: #dc3545;
  --text-primary: #333;
  --text-secondary: #555;
  --bg-main: #f4f7f6;
  --bg-surface: #ffffff;
  --border-color: #dee2e6;
  --border-radius-md: 8px;
  --shadow-soft: 0 4px 15px rgba(0, 0, 0, 0.07);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 600px;
  width: 100%;
  padding: 40px;
  background: var(--bg-surface);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-soft);
  text-align: center;
}

h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

h2 {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
  font-weight: 400;
}

form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  text-align: left;
}

.form-group label,
.form-group-inline label {
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
  display: block;
}

.form-input,
.form-select {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.2);
}

.form-row {
  display: flex;
  gap: 20px;
}

.form-row > div {
  flex: 1;
}

.radio-group {
  display: flex;
  gap: 20px;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.submit-btn {
  width: 100%;
  padding: 15px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  transition: background-color 0.2s, transform 0.1s;
}

.submit-btn:hover {
  background-color: var(--primary-color-hover);
}

.submit-btn:active {
  transform: translateY(1px);
}

.flashes {
  list-style-type: none;
  padding: 0;
  margin-top: 20px;
  text-align: center;
}

.flashes li {
  padding: 15px;
  background-color: #e8f5e9;
  color: #155724;
  border: 1px solid #c3e6cb;
  border-radius: var(--border-radius-md);
  font-size: 1rem;
}

.error-message {
  color: var(--error-color);
  font-size: 0.9rem;
  margin-top: 5px;
}