/* =====================================================
   NBlock - Main Stylesheet
   ===================================================== */

/* CSS Variables */
:root {
  --color-bg: #E5E5E5;
  --color-bg-dark: #D8D8D8;
  --color-text: #2D2D2D;
  --color-text-light: #FFFFFFCC;
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-accent: #8B4513;
  --color-header-bg: #FFFFFF;
  --color-footer-bg: #1A1A1A;
  --color-footer-text: #CCCCCC;
  --color-chip-bg: #F0F0F0;
  --color-card-bg: #FFFFFF;
  
  --font-heading: 'Montserrat', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  
  --radius: 8px;
  --header-height: 60px;
  --container-max: 1200px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* Reset & Base */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul {
  list-style: none;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* Section Title */
.section-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  margin-bottom: 48px;
}

@media (max-width: 768px) {
  .section-title {
    font-size: 2rem;
    margin-bottom: 32px;
  }
}

/* =====================================================
   Header
   ===================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-header-bg);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
}

.header__container {
  max-width: var(--container-max);
  height: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text);
}

.header__nav-list {
  display: flex;
  gap: 32px;
}

.header__nav-link {
  position: relative;
  font-weight: 500;
  padding: 8px 0;
  transition: color var(--transition-fast);
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.header__nav-link:hover::after,
.header__nav-link:focus::after,
.header__nav-link.active::after {
  transform: scaleX(1);
}

.header__nav-link:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

/* Burger Menu */
.header__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  padding: 4px;
}

.header__burger-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.header__burger[aria-expanded="true"] .header__burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__burger[aria-expanded="true"] .header__burger-line:nth-child(2) {
  opacity: 0;
}

.header__burger[aria-expanded="true"] .header__burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-header-bg);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  z-index: 999;
}

.mobile-menu[aria-hidden="false"] {
  transform: translateX(0);
}

.mobile-menu__list {
  display: flex;
  flex-direction: column;
  padding: 24px;
}

.mobile-menu__link {
  display: block;
  padding: 16px 0;
  font-size: 1.25rem;
  font-weight: 500;
  border-bottom: 1px solid var(--color-bg);
}

.mobile-menu__link:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

@media (max-width: 768px) {
  .header__nav {
    display: none;
  }
  
  .header__burger {
    display: flex;
  }
}

/* =====================================================
   Hero Section
   ===================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(to bottom, #4A4A4A, #3A3A3A);
  position: relative;
  padding: calc(var(--header-height) + 40px) 20px 40px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.08;
  pointer-events: none;
}

.hero__content {
  text-align: center;
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--color-white);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  margin-bottom: 24px;
  line-height: 1.2;
}

.hero__subtitle {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__cta {
  display: inline-block;
  padding: 14px 32px;
  border: 2px solid var(--color-accent);
  border-radius: var(--radius);
  color: var(--color-white);
  font-weight: 600;
  font-size: 1rem;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.hero__cta:hover,
.hero__cta:focus {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.hero__cta:focus {
  outline: 2px solid var(--color-white);
  outline-offset: 4px;
}

@media (max-width: 768px) {
  .hero__title {
    font-size: 2.25rem;
  }
  
  .hero__subtitle {
    font-size: 1.1rem;
  }
}

/* =====================================================
   Products Section
   ===================================================== */
.products {
  padding: 80px 0;
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

@media (max-width: 1024px) {
  .products__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .products__grid {
    grid-template-columns: 1fr;
  }
  
  .products {
    padding: 60px 0;
  }
}

/* Product Card */
.product-card {
  background-color: var(--color-card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

@media (prefers-reduced-motion: reduce) {
  .product-card:hover {
    transform: none;
  }
}

.product-card__image-container {
  position: relative;
  aspect-ratio: 4 / 3;
  background-color: var(--color-bg);
  overflow: hidden;
}

.product-card__slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.product-card__slides {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform var(--transition-normal);
}

.product-card__image {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Slider Arrows */
.product-card__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.3);
  border: 2px solid var(--color-white);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-fast), background-color var(--transition-fast);
  z-index: 10;
}

.product-card__image-container:hover .product-card__arrow {
  opacity: 1;
}

.product-card__arrow:hover,
.product-card__arrow:focus {
  background-color: rgba(0, 0, 0, 0.6);
}

.product-card__arrow:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  opacity: 1;
}

.product-card__arrow--prev {
  left: 12px;
}

.product-card__arrow--next {
  right: 12px;
}

/* Hide arrows for single image */
.product-card__slider[data-single="true"] .product-card__arrow,
.product-card__slider[data-single="true"] .product-card__indicators {
  display: none;
}

/* Slider Indicators */
.product-card__indicators {
  position: absolute;
  bottom: 12px;
  right: 12px;
  display: flex;
  gap: 8px;
  z-index: 10;
}

.product-card__indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--color-white);
  transition: background-color var(--transition-fast);
}

.product-card__indicator.active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.product-card__indicator:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Product Card Content */
.product-card__content {
  padding: 20px;
}

.product-card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.product-card__description {
  font-size: 0.95rem;
  color: #555;
  margin-bottom: 16px;
  line-height: 1.5;
}

.product-card__sizes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.product-card__chip {
  display: inline-block;
  padding: 4px 10px;
  background-color: var(--color-chip-bg);
  color: var(--color-text);
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* =====================================================
   Color Selection Section
   ===================================================== */
.color-selection {
  padding: 80px 0;
  background-color: var(--color-white);
}

.color-selection__text {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 48px;
  font-size: 1.1rem;
  line-height: 1.7;
}

.color-selection__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.color-selection__palette {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.color-selection__btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-radius: var(--radius);
  transition: transform var(--transition-fast);
}

.color-selection__btn:hover {
  transform: scale(1.05);
}

.color-selection__btn:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  .color-selection__btn:hover {
    transform: none;
  }
}

.color-selection__swatch {
  width: 60px;
  height: 60px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast);
}

.color-selection__btn.active .color-selection__swatch {
  box-shadow: 0 0 0 2px var(--color-black);
}

.color-selection__label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
}

.color-selection__demo-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 600px;
}

.color-demo__image {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
  .color-selection {
    padding: 60px 0;
  }
  
  .color-selection__content {
    gap: 24px;
  }
}

/* =====================================================
   Materials Section
   ===================================================== */
.materials {
  padding: 80px 0;
}

.materials__content {
  max-width: 800px;
  margin: 0 auto;
}

.materials__content p {
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.materials__content p:last-child {
  margin-bottom: 0;
}

.materials__content strong {
  color: var(--color-text);
  font-weight: 600;
}

@media (max-width: 768px) {
  .materials {
    padding: 60px 0;
  }
}

/* =====================================================
   Contacts Section
   ===================================================== */
.contacts {
  background-color: var(--color-white);
}

.contacts__wrapper {
  display: grid;
  grid-template-columns: 50% 50%;
}

.contacts__map {
  overflow: hidden;
}

.contacts__map iframe {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 400px;
}

.contacts__right {
  padding: 80px 48px;
}

.contacts__right .section-title {
  text-align: left;
  margin-bottom: 48px;
}

.contacts__info {
  display: flex;
  align-items: flex-start;
}

.contacts__list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contacts__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1.05rem;
  line-height: 1.5;
}

.contacts__icon {
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contacts__item a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: text-decoration-color var(--transition-fast);
}

.contacts__item a:hover,
.contacts__item a:focus {
  text-decoration-color: var(--color-accent);
}

.contacts__item a:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .contacts__wrapper {
    grid-template-columns: 1fr;
  }
  
  .contacts__map iframe {
    min-height: 300px;
    height: 300px;
  }
  
  .contacts__right {
    padding: 60px 20px;
  }
  
  .contacts__right .section-title {
    text-align: center;
    margin-bottom: 32px;
  }
}

/* =====================================================
   Footer
   ===================================================== */
.footer {
  background-color: var(--color-footer-bg);
  min-height: 160px;
  display: flex;
  align-items: center;
}

.footer__container {
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
  padding: 32px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer__logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
}

.footer__tagline {
  font-size: 0.9rem;
  color: var(--color-footer-text);
  font-style: italic;
}

.footer__info {
  text-align: right;
  color: var(--color-white);
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer__info p {
  margin-bottom: 4px;
}

.footer__info p:last-child {
  margin-bottom: 0;
}

.footer__info a {
  color: var(--color-white);
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: text-decoration-color var(--transition-fast);
}

.footer__info a:hover,
.footer__info a:focus {
  text-decoration-color: var(--color-white);
}

.footer__info a:focus {
  outline: 2px solid var(--color-white);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .footer__container {
    flex-direction: column;
    text-align: center;
    gap: 24px;
  }
  
  .footer__brand {
    align-items: center;
  }
  
  .footer__info {
    text-align: center;
  }
}

/* =====================================================
   Focus Visible (for keyboard navigation)
   ===================================================== */
:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* =====================================================
   Print Styles
   ===================================================== */
@media print {
  .header,
  .mobile-menu,
  .hero__cta,
  .product-card__arrow,
  .product-card__indicators {
    display: none;
  }
  
  .hero {
    min-height: auto;
    padding: 40px 20px;
  }
  
  .products__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}