.contact-us {
  max-width: 800px;
  width: 100%;
  background: white;
  border-radius: 12px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
  padding: 40px;
  margin: 50px auto;
}

.header {
  text-align: center;
  margin-bottom: 30px;
}

.header h1 {
  font-size: 36px;
  color: #2c3e50;
  margin-bottom: 15px;
  font-weight: 600;
}

.header p {
  font-size: 18px;
  color: #7f8c8d;
  line-height: 1.6;
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 25px;
}

.form-row {
  display: flex;
  gap: 20px;
  margin-bottom: 25px;
}

.form-row .form-group {
  flex: 1;
  margin-bottom: 0;
}

label {
  display: block;
  font-size: 16px;
  font-weight: 500;
  color: #2c3e50;
  margin-bottom: 8px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
  width: 100%;
  padding: 15px;
  font-size: 16px;
  border: 1px solid #dcdee3;
  border-radius: 8px;
  background-color: #fff;
  transition: border-color 0.2s;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
textarea:focus,
select:focus {
  border-color: var(--theme-color);
  outline: none;
  box-shadow: 0 0 0 2px var(--theme-color-02);
}

.radio-group {
  display: flex;
  gap: 20px;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 8px;
}

.radio-option input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--theme-color);
}

textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.5;
}

.optional {
  color: #95a5a6;
  font-weight: 400;
  margin-left: 5px;
}

.file-section {
  margin: 35px 0;
}

.file-section h3 {
  font-size: 18px;
  color: #2c3e50;
  margin-bottom: 15px;
  font-weight: 500;
}

.file-upload {
  display: inline-block;
  background: var(--theme-color);
  color: white;
  padding: 12px 25px;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s;
  font-weight: 500;
}

.file-upload:hover {
  background: var(--theme-color);
}

.file-list {
  margin-top: 20px;
  padding: 20px;
  background-color: #f8f9fa;
  border-radius: 8px;
  display: none;
}

.file-list.visible {
  display: block;
}

.file-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 15px;
  background: white;
  border-radius: 6px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  margin-bottom: 10px;
}

.file-item:last-child {
  margin-bottom: 0;
}

.file-name {
  flex-grow: 1;
  font-size: 15px;
  color: #2c3e50;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-right: 15px;
}

.file-remove {
  color: #e74c3c;
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
}

.file-remove:hover {
  background: #fdf0f0;
}

.submit-btn {
  width: 100%;
  background: var(--theme-color);
  color: white;
  border: none;
  padding: 18px;
  font-size: 18px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s;
  box-shadow: 0 4px 8px var(--theme-color-03);
}

.submit-btn:hover {
  background: var(--theme-color);
  box-shadow: 0 5px 10px var(--theme-color-04);
}

.form-description {
  color: #7f8c8d;
  font-size: 15px;
  margin-top: 6px;
  line-height: 1.5;
}

@media (max-width: 768px) {
  .form-row {
    flex-direction: column;
    gap: 15px;
  }

  .contact-us {
    padding: 25px;
  }

  .header h1 {
    font-size: 28px;
  }

  .header p {
    font-size: 16px;
  }

  .radio-group {
    flex-direction: column;
    gap: 12px;
  }
}

.version-info {
  text-align: center;
  margin-top: 20px;
  color: #7f8c8d;
  font-size: 14px;
}