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

html {
  scroll-behavior: smooth;
}

body {
  background: #000;
  color: #fff;
  font-family: Arial, sans-serif;
}

/* HEADER */
.site-header {
  width: 100%;
  height: 70px;
  padding: 0 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  background: #e650d3;
  color: #000;
}

.site-logo {
  color: #000;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  text-decoration: none;
}

.contact-info {
  display: flex;
  gap: 45px;
}

.contact-info a {
  color: #000;
  font-size: 16px;
  text-decoration: none;
}

/* MAIN LAYOUT */
.order-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  padding: 120px 50px 80px;
  max-width: 1600px;
  margin: 0 auto;
}

/* SECTION LABEL */
.section-label {
  color: #888;
  font-size: 12px;
  letter-spacing: 1px;
  margin-bottom: 30px;
}

/* PRODUCT */
.product-section {
  max-width: 650px;
}

.product-image {
  width: 100%;
  margin-bottom: 25px;
}

.product-image img {
  display: block;
  width: 100%;
  height: auto;
}

.product-info h1 {
  font-size: 32px;
  letter-spacing: -1px;
  margin-bottom: 5px;
}

.product-publisher {
  font-size: 15px;
  margin-bottom: 15px;
}

.product-description {
  color: #999;
  font-size: 14px;
  line-height: 1.7;
}

.product-price {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid #444;
  padding-top: 15px;
  margin-top: 30px;
  font-size: 13px;
}

/* ORDER FORM */
.order-section {
  max-width: 600px;
  width: 100%;
}

.order-section h2 {
  font-size: 36px;
  letter-spacing: -1px;
  margin-bottom: 10px;
}

.order-intro {
  color: #999;
  font-size: 14px;
  margin-bottom: 45px;
}

.form-group {
  margin-bottom: 28px;
}

.form-group label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 13px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid #555;
  border-radius: 0;
  color: #fff;
  font-family: inherit;
  font-size: 14px;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-bottom-color: #e650d3;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #666;
}

.form-group textarea {
  min-height: 70px;
  resize: vertical;
}

/* ORDER SUMMARY */
.order-summary {
  margin-top: 45px;
  border-top: 1px solid #555;
  padding-top: 20px;
}

.order-summary div {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  margin-bottom: 15px;
}

.order-summary div span:first-child {
  color: #999;
}

.order-summary .total {
  border-top: 1px solid #555;
  padding-top: 20px;
  margin-top: 20px;
  font-size: 16px;
  font-weight: 700;
}

.order-summary .total span:first-child {
  color: #fff;
}

/* BUTTON */
.order-button {
  width: 100%;
  padding: 20px;
  margin-top: 25px;
  border: none;
  background: #e650d3;
  color: #000;
  font-size: 16px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.order-button:hover {
  opacity: 0.7;
}

.order-notice {
  margin-top: 18px;
  color: #777;
  font-size: 11px;
  line-height: 1.6;
  text-align: center;
}

/* BACK LINK */
.back-link {
  display: inline-block;
  margin-top: 35px;
  color: #999;
  font-size: 12px;
  text-decoration: none;
}

.back-link:hover {
  color: #e650d3;
}

/* MOBILE */
@media (max-width: 768px) {

  .site-header {
    height: 55px;
    padding: 0 15px;
  }

  .site-logo {
    font-size: 16px;
  }

  .contact-info {
    gap: 16px;
  }

  .contact-info a {
    font-size: 12px;
  }

  .order-layout {
    display: flex;
    flex-direction: column;
    gap: 60px;
    padding: 90px 20px 50px;
  }

  .product-info h1 {
    font-size: 26px;
  }

  .order-section h2 {
    font-size: 30px;
  }

  .order-intro {
    margin-bottom: 35px;
  }
}