:root {
  --color-primary: #0a7cff;
  --color-primary-dark: #0056b3;
  --color-text: #1e1e1e;
  --color-text-light: #666;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fa;
  --color-border: #e0e0e0;
  --font-heading: "Inter", sans-serif;
  --font-body: "Roboto", sans-serif;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --container-width: 1200px;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  --box-shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  width: 100%;
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-2xl);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-light);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn--primary {
  background-color: var(--color-primary);
  color: white;
  box-shadow: 0 4px 12px rgba(10, 124, 255, 0.3);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(10, 124, 255, 0.4);
}

.btn--outline {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

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

.btn--block {
  width: 100%;
}

.header {
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
}

.logo a {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
}

.logo img {
  border-radius: 8px;
}

.nav {
  flex: 1;
}

.nav__list {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  justify-content: center;
}

.nav__link {
  font-weight: 500;
  transition: var(--transition);
}

.nav__link:hover {
  color: var(--color-primary);
}

.header__notice {
  font-size: 0.8rem;
  color: var(--color-text-light);
  max-width: 200px;
  text-align: right;
  line-height: 1.3;
}

.header__actions {
  display: flex;
  align-items: center;
}

.cart-icon {
  font-size: 1.5rem;
  color: var(--color-text);
  transition: var(--transition);
}

.cart-icon:hover {
  color: var(--color-primary);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--color-text);
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--spacing-3xl);
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  margin-bottom: var(--spacing-lg);
}

.hero__subtitle {
  font-size: 1.2rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
}

.hero__price {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.price--current {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.price--old {
  font-size: 1.5rem;
  text-decoration: line-through;
  color: var(--color-text-light);
}

.price--save {
  background: #ff4757;
  color: white;
  padding: 4px 12px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
}

.hero__cta {
  display: flex;
  gap: var(--spacing-md);
}

.hero__image img {
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  width: 100%;
  object-fit: cover;
  aspect-ratio: 1/1;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.feature-card {
  background: var(--color-bg-alt);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--box-shadow);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow-hover);
}

.feature-card__icon {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
}

.feature-card h3 {
  margin-bottom: var(--spacing-md);
  font-size: 1.4rem;
}

.product-showcase__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.product-showcase__gallery {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.gallery-main img {
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  width: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
}

.gallery-thumbs {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
}

.gallery-thumb {
  background: none;
  border: 2px solid transparent;
  border-radius: var(--border-radius-sm);
  padding: 0;
  cursor: pointer;
  transition: var(--transition);
  opacity: 0.7;
}

.gallery-thumb.active {
  border-color: var(--color-primary);
  opacity: 1;
}

.gallery-thumb img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--border-radius-sm);
}

.check-list {
  list-style: none;
  margin: var(--spacing-lg) 0;
}

.check-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  font-size: 1.1rem;
}

.check-list i {
  color: var(--color-primary);
}

.stats {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 3.5rem;
  font-weight: 700;
  font-family: var(--font-heading);
  line-height: 1;
}

.stat-label {
  font-size: 1.2rem;
  opacity: 0.9;
}

.reviews__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.review-card {
  background: var(--color-bg-alt);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow-hover);
}

.review-card__rating {
  color: #ffb800;
  font-size: 1.2rem;
  margin-bottom: var(--spacing-md);
}

.review-card__text {
  font-style: italic;
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.review-card__author {
  font-weight: 500;
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-md);
}

.contact__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  background: var(--color-bg-alt);
  border-radius: var(--border-radius);
  padding: var(--spacing-2xl);
  box-shadow: var(--box-shadow);
}

.contact__info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-details {
  margin-top: var(--spacing-xl);
}

.contact-details p {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  font-size: 1.1rem;
}

.contact-details i {
  color: var(--color-primary);
  width: 24px;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(10, 124, 255, 0.2);
}

.form-group--checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.form-group--checkbox input {
  width: auto;
  margin-top: 4px;
}

.form-group--checkbox label {
  font-weight: 400;
  margin-bottom: 0;
}

.form-group--checkbox a {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer {
  background: #111;
  color: #ddd;
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: auto;
}

.footer__container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
}

.footer__logo a {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: white;
}

.footer__contact p {
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
}

.footer__legal {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__legal a {
  color: #ddd;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer__legal a:hover {
  color: white;
  text-decoration: underline;
}

.footer__disclaimer {
  font-size: 0.85rem;
  color: #999;
  line-height: 1.6;
  max-width: 800px;
  border-top: 1px solid #333;
  padding-top: var(--spacing-lg);
}

.footer__bottom {
  border-top: 1px solid #333;
  padding-top: var(--spacing-lg);
  text-align: center;
}

.footer__copyright {
  font-size: 0.85rem;
  color: #777;
}

.legal-page {
  padding: var(--spacing-2xl) 0;
}

.legal-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.legal-content h1 {
  font-size: 2rem;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.legal-content h2 {
  font-size: 1.8rem;
  margin: var(--spacing-xl) 0 var(--spacing-md);
}

.legal-content h3 {
  font-size: 1.4rem;
  margin: var(--spacing-lg) 0 var(--spacing-md);
}

.legal-content p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
  color: #333;
}

.legal-content ul, .legal-content ol {
  margin-left: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.legal-content li {
  margin-bottom: var(--spacing-sm);
}

.legal-content a {
  color: var(--color-primary);
  text-decoration: underline;
}

.legal-content b, .legal-content strong {
  font-weight: 600;
}

@media screen and (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  .section {
    padding: var(--spacing-2xl) 0;
  }
  .hero__container,
  .product-showcase__container,
  .contact__container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  .hero__image {
    order: -1;
  }
  .features__grid,
  .reviews__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav__list {
    gap: var(--spacing-lg);
  }
}

@media screen and (max-width: 768px) {
  .header__container {
    flex-wrap: wrap;
  }
  .header__notice {
    display: none;
  }
  .nav {
    order: 2;
    width: 100%;
  }
  .nav__list {
    display: none;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 0;
  }
  .nav__list.active {
    display: flex;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .features__grid,
  .reviews__grid {
    grid-template-columns: 1fr;
  }
  .footer__top {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .footer__contact {
    text-align: center;
  }
  .footer__legal {
    align-items: center;
  }
  .footer__disclaimer {
    text-align: center;
  }
  .btn {
    padding: 10px 20px;
  }
  .hero__cta {
    flex-direction: column;
  }
  .gallery-thumbs {
    flex-wrap: wrap;
  }
  .legal-content {
    padding: 30px 16px;
  }
}

@media screen and (max-width: 480px) {
  .section-title {
    font-size: 1.8rem;
  }
  .hero__price {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
  }
  .contact__container {
    padding: var(--spacing-lg);
  }
  .stats__grid {
    grid-template-columns: 1fr;
  }
  .stat-number {
    font-size: 2.5rem;
  }
}