:root {
  --primary-color: #1b365d;
  --secondary-color: #4a777a;
  --bg-color: #f4f7f6;
  --border-color: #cccccc;
  --error-color: #d9534f;
  --warning-bg: #fff3cd;
  --warning-text: #856404;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-color);
  color: #333;
  line-height: 1.5;
  margin: 0;
  padding: 20px;
}

.form-container {
  max-width: 800px;
  margin: 0 auto;
  background: #ffffff;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.form-header {
  text-align: center;
  margin-bottom: 25px;
}

.form-header h1 {
  font-size: 1.25rem;
  color: var(--primary-color);
  margin-bottom: 5px;
}

.sub-header, .contact-info {
  font-size: 0.875rem;
  color: #555;
  margin: 2px 0;
}

.form-header h2 {
  font-size: 1.1rem;
  margin-top: 15px;
  margin-bottom: 2px;
}

.form-header h3 {
  font-size: 1rem;
  color: var(--secondary-color);
  margin-top: 0;
}

.notice-box {
  background-color: #eef4f8;
  border-left: 4px solid var(--primary-color);
  padding: 12px 15px;
  font-size: 0.85rem;
  margin-bottom: 25px;
}

fieldset {
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 20px;
  margin-bottom: 25px;
  background: #fafafa;
}

legend {
  font-weight: bold;
  color: var(--primary-color);
  padding: 0 10px;
  font-size: 1.05rem;
}

.note {
  font-size: 0.85rem;
  color: #666;
  margin-top: -10px;
  margin-bottom: 15px;
}

.field-hint {
  font-size: 0.85rem;
  color: #555;
  margin-bottom: 10px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 15px;
}

@media (min-width: 600px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 15px;
}

label {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 5px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.95rem;
  box-sizing: border-box;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 4px rgba(27, 54, 93, 0.3);
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 5px;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 10px;
}

@media (min-width: 600px) {
  .checkbox-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.checkbox-grid label {
  font-weight: normal;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.upload-box {
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px dashed var(--border-color);
}

.warning-banner {
  background-color: var(--warning-bg);
  color: var(--warning-text);
  font-weight: bold;
  text-align: center;
  padding: 10px;
  border-radius: 4px;
  margin-top: 15px;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

.hidden {
  display: none;
}

.error-message {
  color: var(--error-color);
  font-size: 0.8rem;
  margin-top: 3px;
  display: none;
}

.invalid input, .invalid textarea, .invalid select {
  border-color: var(--error-color);
}

.invalid .error-message {
  display: block;
}

.form-actions {
  text-align: center;
  margin-top: 20px;
}

.btn-submit {
  background-color: var(--primary-color);
  color: #fff;
  border: none;
  padding: 12px 30px;
  font-size: 1rem;
  font-weight: bold;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.btn-submit:hover {
  background-color: #12243e;
}