/* ============================================
   PREMIUM DESIGN LAYER — market-tf.ru
   Design tokens, animations, focus states,
   micro-interactions, premium hover effects
   ============================================ */

/* --- Design Tokens --- */
:root {
  /* Colors */
  --color-primary: #F15A29;
  --color-primary-hover: #d94e20;
  --color-primary-active: #c2441b;
  --color-primary-light: rgba(241, 90, 41, 0.08);
  --color-text: #212529;
  --color-text-secondary: #555555;
  --color-text-muted: #888888;
  --color-border: #E6E6E6;
  --color-border-hover: #CCCCCC;
  --color-bg-light: #F7F7F7;
  --color-bg-subtle: #F2F2F2;
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-error: #E53935;
  --color-success: #2E7D32;
  --color-overlay: rgba(0, 0, 0, 0.6);

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-2xl: 48px;
  --radius-full: 50%;

  /* Shadows — layered for depth */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
  --shadow-button: 0 2px 8px rgba(241, 90, 41, 0.25);
  --shadow-button-hover: 0 4px 16px rgba(241, 90, 41, 0.35);

  /* Transitions */
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 400ms;
}

/* --- Smooth Scrolling --- */
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Body Font Weight Fix (600 -> 400 for body, keep 600 for headings) --- */
body {
  font-weight: var(--font-weight-regular);
  letter-spacing: -0.01em;
}
.h_type_1, .h_type_2, .h_type_3,
h1, h2, h3 {
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.02em;
}
.h_type_1, h1 {
  font-weight: var(--font-weight-bold);
}

/* --- Selection Color --- */
::selection {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* --- Focus States (Accessibility) --- */
:focus {
  outline: none;
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  border-color: var(--color-primary) !important;
  box-shadow: 0 0 0 3px var(--color-primary-light);
  outline: none;
}

/* --- Link Transitions --- */
a {
  transition: color var(--duration-fast) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
}

/* --- Button Premium Styling --- */
.default_button {
  position: relative;
  font-weight: var(--font-weight-semibold);
  padding: 16px 32px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-spring),
              box-shadow var(--duration-base) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
  box-shadow: var(--shadow-button);
}
.default_button:hover {
  background-color: var(--color-primary-hover);
  box-shadow: var(--shadow-button-hover);
  transform: translateY(-1px);
}
.default_button:active {
  background-color: var(--color-primary-active);
  transform: translateY(0);
  box-shadow: none;
  transition-duration: 50ms;
}

/* --- Product Card Hover Effects --- */
.items_card {
  transition: transform var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              border-color var(--duration-base) var(--ease-out);
  overflow: hidden;
}
.items_card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-border-hover);
}
.items_card img {
  transition: transform var(--duration-slow) var(--ease-out);
}
.items_card:hover img {
  transform: scale(1.04);
}
.items_card .items_card_description {
  font-weight: var(--font-weight-medium);
}
.items_card .items_card_description div:last-child {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

/* --- Brand Grid Items --- */
.section_slider_brands .grid .grid_line .grid_line_item {
  transition: transform var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              background-size var(--duration-slow) var(--ease-out);
}
.section_slider_brands .grid .grid_line .grid_line_item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* --- Category Cards --- */
.section_category .grid .grid_line .grid_line_item {
  transition: background-size var(--duration-slow) var(--ease-out);
}
.section_category .grid .grid_line .grid_line_item span {
  transition: background-color var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
}
.section_category .grid .grid_line .grid_line_item span:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* --- Choose Section (Спортивная / Повседневная) --- */
.section_choose div {
  transition: background-size var(--duration-slow) var(--ease-out);
  overflow: hidden;
}
.section_choose span {
  transition: background-color var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-spring);
  font-weight: var(--font-weight-semibold);
}
.section_choose span:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* --- Product Page Image Zoom --- */
.section_product .product_images .zoooom {
  cursor: zoom-in;
  transition: transform var(--duration-slow) var(--ease-out);
}
.section_product .product_images .zoooom:hover {
  transform: scale(1.02);
}

/* --- Gallery Thumbnails --- */
.section_product .product_images .gallery img {
  transition: border-color var(--duration-fast) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
  opacity: 0.7;
  cursor: pointer;
}
.section_product .product_images .gallery img:hover,
.section_product .product_images .gallery img.border_1px {
  opacity: 1;
}

/* --- Size Buttons Premium --- */
.size_value label {
  transition: background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-spring);
  cursor: pointer;
}
.size_value label:not(.unavailable):hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}
.size_value input:checked + label {
  background-color: var(--color-primary) !important;
  border-color: var(--color-primary) !important;
  color: var(--color-white) !important;
  transform: scale(1.02);
  box-shadow: var(--shadow-button);
}

/* --- Toggle Size Buttons (EU/US/UK) --- */
.toggle_sizes button {
  transition: background-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

/* --- Order Button --- */
button.register {
  font-size: 1rem;
  letter-spacing: 0.02em;
}

/* --- Accordion Premium --- */
.accordion-item {
  transition: border-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}
.accordion-item:hover {
  border-color: var(--color-border-hover);
}
.accordion-item:has(.accordion-button:not(.collapsed)) {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-border-hover);
}
.accordion-button {
  font-weight: var(--font-weight-semibold);
}

/* --- Footer Links --- */
#footer nav a {
  transition: opacity var(--duration-fast) var(--ease-out);
}
#footer nav a:hover {
  opacity: 1;
}

/* --- Header Nav Premium --- */
#header nav a {
  transition: color var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
}
#header nav .dropdown-menu {
  animation: dropdown-appear var(--duration-base) var(--ease-out);
  transform-origin: top center;
}
@keyframes dropdown-appear {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* --- Order Modal --- */
#order_screen {
  animation: modal-backdrop var(--duration-base) var(--ease-out);
}
#order_screen .order_screen_form {
  animation: modal-slide-up var(--duration-slow) var(--ease-spring);
}
@keyframes modal-backdrop {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes modal-slide-up {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* --- Close Button Hover --- */
#order_screen .order_screen_form .icon-cross {
  transition: background-color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-spring);
}
#order_screen .order_screen_form .icon-cross:hover {
  background-color: var(--color-border);
  transform: rotate(90deg);
}

/* --- Form Inputs Focus --- */
#order_screen .order_screen_form form input.element:focus,
#order_screen .order_screen_form form select.element:focus,
.section_contact_form form input:focus,
.section_contact_form form textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
  outline: none;
}

/* --- Pagination --- */
.pagination_container a,
.pagination_container span {
  transition: background-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-spring);
}
.pagination_container a:hover {
  transform: translateY(-1px);
}

/* --- Page Load Animations --- */
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section_logo,
.section_choose,
.items_title_another,
.section_slider_brands,
.section_category,
.section_contact_form {
  animation: fade-up 0.6s var(--ease-out) both;
}
.section_logo        { animation-delay: 0s; }
.section_choose      { animation-delay: 0.1s; }
.items_title_another { animation-delay: 0.15s; }
.section_slider_brands { animation-delay: 0.2s; }
.section_category    { animation-delay: 0.25s; }
.section_contact_form { animation-delay: 0.3s; }

/* Product page sections */
.section_product {
  animation: fade-up 0.5s var(--ease-out) both;
}
.same_products {
  animation: fade-up 0.5s var(--ease-out) 0.15s both;
}

/* --- Image Lazy Load Fade-In --- */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity var(--duration-slow) var(--ease-out);
}
img[loading="lazy"].loaded,
img[loading="lazy"][complete] {
  opacity: 1;
}

/* --- Breadcrumb subtle animation --- */
.breadcrumb a {
  transition: color var(--duration-fast) var(--ease-out);
}
.breadcrumb a:hover {
  color: var(--color-text);
}

/* --- Scroll-triggered reveal (JS companion) --- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease-out),
              transform 0.5s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Smooth image swap on product cards --- */
.items_card .image_second {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
  object-fit: contain;
  border-radius: var(--radius-xl);
}
.items_card:hover .image_second {
  opacity: 1;
}

/* --- Logo Section Premium --- */
.section_logo span {
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

/* --- Price Highlight --- */
.product_info .price,
.XS_info .price {
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

/* --- Subtle divider lines --- */
.section_product {
  border-bottom-color: var(--color-border);
}

/* --- Checkbox / Radio Premium --- */
.form_row .policy input,
#order_screen .order_screen_form .policy input,
#order_screen .order_screen_form form .form_delivery_element input {
  transition: background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-spring);
}
.form_row .policy input:hover,
#order_screen .order_screen_form .policy input:hover,
#order_screen .order_screen_form form .form_delivery_element input:hover {
  border-color: var(--color-primary);
}
.form_row .policy input:checked,
#order_screen .order_screen_form .policy input:checked,
#order_screen .order_screen_form form .form_delivery_element input:checked {
  transform: scale(1.1);
}

/* --- Disabled Button State --- */
.section_contact_form form button:disabled,
#order_screen .order_screen_form button:disabled {
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* --- Size Table Modal Premium --- */
#size_table_container {
  animation: modal-backdrop var(--duration-base) var(--ease-out);
}
#size_table_container .table_container {
  animation: modal-slide-up var(--duration-slow) var(--ease-spring);
}

/* --- Mobile Menu Smooth --- */
.menu_cover_screen {
  transition: width var(--duration-slow) var(--ease-in-out);
}

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