/* ============================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
  /* Brand Colors */
  --color-hf-blue: #00b4e5;
  --color-hf-blue-hover: #0092c7;
  --color-hf-red: #f42534;
  --color-hf-red-hover: #d91e2d;
  --color-accent: #c60c46;
  --color-accent-light: #ed273a;

  /* Neutral Colors */
  --color-text-primary: #000000;
  --color-text-secondary: #5f6062;
  --color-text-muted: #666666;
  --color-border: #cfcfd0;
  --color-bg-gray: #efefef;
  --color-bg-white: #ffffff;

  /* Typography */
  --font-family-base: myriad-pro, "Myriad Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-size-base: 1rem;
  --line-height-base: 1.5;
  --line-height-tight: 1.2;
  --line-height-heading: 1.1;

  /* Spacing Scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 2.5rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Layout */
  --container-max-width: 1560px;
  --content-max-width: 75rem;
  --grid-gap: 2rem;

  /* Effects */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-hover: 0 20px 25px rgba(0, 0, 0, 0.12), 0 8px 10px rgba(0, 0, 0, 0.08);
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --transition-base: 0.2s ease-in-out;
  --transition-slow: 0.3s ease-in-out;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg-white);
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
}

p {
  margin: 0 0 var(--space-md);
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: var(--line-height-base);
}

hr {
  margin: var(--space-2xl) 0;
  border: 0;
  border-top: 1px solid var(--color-border);
}

/* ============================================
   SKIP LINK (Accessibility)
   ============================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-hf-red);
  color: white;
  font-weight: 600;
  z-index: 100;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-hf-blue);
  outline-offset: 2px;
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

@media (min-width: 60em) {
  .container {
    padding-inline: var(--space-lg);
  }
}

/* ============================================
   NAVIGATION HEADER
   ============================================ */
.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  background-color: var(--color-bg-white);
  border-bottom: 2px solid var(--color-border);
  padding-inline: var(--space-sm);
  position: relative;
}

@media (max-width: 47.9375em) {
  .nav {
    justify-content: center;
    padding-block: var(--space-xs);
  }
}

@media (min-width: 48em) {
  .nav {
    padding-inline: var(--space-md);
  }
}

.nav_item {
  display: inline-block;
  padding: 0.875rem var(--space-xs);
  font-size: 0.9375rem;
  font-weight: 400;
  line-height: var(--line-height-tight);
  color: var(--color-text-secondary);
  transition: color var(--transition-base), background-color var(--transition-base);
  position: relative;
}

@media (min-width: 48em) {
  .nav_item {
    font-size: 1rem;
    padding-inline: 0.75rem;
  }
}

.nav_item:hover,
.nav_item:focus {
  color: var(--color-accent);
  outline: none;
}

.nav_item:focus-visible {
  outline: 2px solid var(--color-hf-blue);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.nav_item_active {
  background-color: var(--color-bg-gray);
  font-weight: 500;
  color: var(--color-text-primary);
}

/* ============================================
   LANGUAGE SELECTOR
   ============================================ */
.language-selector {
  margin-inline-start: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@media (max-width: 47.9375em) {
  .language-selector {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
  }
}

.language-selector_icon {
  width: 1.125rem;
  height: 1.125rem;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  transition: color var(--transition-base);
}

@media (max-width: 47.9375em) {
  .language-selector_icon {
    display: none;
  }
}

.language-selector label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.language-selector select {
  font-family: var(--font-family-base);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 1.75rem 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-white);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%235f6062' d='M5 6L0 1l.7-.7L5 4.6 9.3.3l.7.7z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.625rem center;
  background-size: 0.625rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: border-color var(--transition-base), background-color var(--transition-base), color var(--transition-base);
  appearance: none;
  min-width: 5.5rem;
}

.language-selector select:hover {
  border-color: var(--color-text-secondary);
  background-color: var(--color-bg-gray);
  color: var(--color-text-primary);
}

.language-selector select:focus {
  outline: 2px solid var(--color-hf-blue);
  outline-offset: 2px;
  border-color: var(--color-hf-blue);
}

.language-selector:hover .language-selector_icon {
  color: var(--color-text-primary);
}

/* ============================================
   LOGO SECTION
   ============================================ */
.nav_logo {
  padding-block: var(--space-lg);
  text-align: center;
}

@media (min-width: 60em) {
  .nav_logo {
    text-align: left;
    padding-block: var(--space-xl) var(--space-md);
  }
}

.nav_logo a {
  display: inline-block;
  transition: opacity var(--transition-base);
}

.nav_logo a:hover,
.nav_logo a:focus {
  opacity: 0.85;
}

.nav_logo a:focus-visible {
  outline: 3px solid var(--color-hf-blue);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.nav_logo img {
  width: 180px;
  height: auto;
}

@media (min-width: 60em) {
  .nav_logo img {
    width: 280px;
  }
}

/* ============================================
   PAGE HEADER
   ============================================ */
.page_title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: var(--line-height-heading);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-block: var(--space-lg) var(--space-md);
  color: var(--color-text-primary);
}

@media (min-width: 60em) {
  .page_title {
    margin-block: var(--space-3xl) var(--space-xl);
  }
}

.page_description {
  max-width: var(--content-max-width);
  margin-block-end: var(--space-xl);
  color: var(--color-text-primary);
}

@media (min-width: 60em) {
  .page_description {
    margin-block-end: var(--space-3xl);
  }
}

/* ============================================
   CATALOG GRID
   ============================================ */
.catalog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-block: var(--space-xl);
}

@media (min-width: 45em) {
  .catalog-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }
}

@media (min-width: 60em) {
  .catalog-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--grid-gap);
    margin-block: var(--space-2xl);
  }
}

/* ============================================
   CATALOG CARD
   ============================================ */
.catalog-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-white);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
  height: 100%;
}

.catalog-card:hover,
.catalog-card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.catalog-card_image-wrapper {
  position: relative;
  overflow: hidden;
  background-color: #f9f9f9;
}

.catalog-card_image-wrapper::after {
  content: "";
  display: block;
  padding-bottom: 75%;
}

.catalog-card_link {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.catalog-card_link:focus-visible {
  outline: 3px solid var(--color-hf-blue);
  outline-offset: -3px;
}

.catalog-card_image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--space-md);
  transition: transform var(--transition-slow);
}

.catalog-card:hover .catalog-card_image,
.catalog-card:focus-within .catalog-card_image {
  transform: scale(1.05);
}

.catalog-card_content {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  flex-grow: 1;
}

.catalog-card_badge {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-accent-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.catalog-card_title {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  font-weight: 700;
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  margin: 0;
}

.catalog-card_description {
  font-size: 0.9375rem;
  line-height: var(--line-height-base);
  color: var(--color-text-muted);
  margin: 0;
  flex-grow: 1;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .nav,
  .language-selector,
  .skip-link {
    display: none;
  }

  .catalog-card {
    box-shadow: none;
    border: 1px solid var(--color-border);
    page-break-inside: avoid;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: var(--color-text-secondary);
  }

  .catalog-card_link::after {
    content: none;
  }
}

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