/* ==========================================================================
   KynoFog Homepage Styles
   深色霓虹风格 / 响应式 / 纯手写
   ========================================================================== */

/* ==========================================================================
   1. Design System (CSS Variables)
   ========================================================================== */

:root {
  /* Colors - Dark Neon Theme */
  --color-bg: #0a0a0f;
  --color-bg-elevated: #13131a;
  --color-bg-card: #1a1a24;
  --color-bg-hover: #22222e;

  --color-text: #ffffff;
  --color-text-secondary: #a0a0b0;
  --color-text-muted: #606070;

  --color-primary: #00d9ff;        /* Cyan neon */
  --color-primary-glow: #00d9ff40;
  --color-primary-hover: #33e3ff;

  --color-accent: #a855f7;         /* Purple neon */
  --color-accent-glow: #a855f740;

  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  --color-border: #2a2a38;
  --color-border-light: #3a3a48;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-display: "Inter", var(--font-sans);

  --fs-h1: clamp(2rem, 5vw, 3.5rem);
  --fs-h2: clamp(1.75rem, 4vw, 2.5rem);
  --fs-h3: clamp(1.25rem, 2.5vw, 1.5rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-xs: 0.75rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 5rem;

  /* Layout */
  --container-max: 1280px;
  --header-height: 72px;
  --announcement-height: 40px;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows & Effects */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 24px var(--color-primary-glow);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Z-index layers */
  --z-header: 100;
  --z-dropdown: 200;
  --z-mobile-menu: 300;
  --z-age-gate: 400;
}

/* ==========================================================================
   2. Reset & Base
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.no-scroll {
  overflow: hidden;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ==========================================================================
   3. Utility Classes
   ========================================================================== */

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

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-lg);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-inline: var(--space-xl);
  }
}

.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;
}

/* ==========================================================================
   4. Logo
   ========================================================================== */

.logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--color-text);
  text-transform: uppercase;
}

.logo-text__accent {
  color: var(--color-primary);
  text-shadow: 0 0 20px var(--color-primary-glow);
}

/* ==========================================================================
   5. Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: var(--fs-body);
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  user-select: none;
}

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-bg);
  box-shadow: 0 0 0 0 var(--color-primary-glow);
}

.btn--primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 0 24px var(--color-primary-glow);
  transform: translateY(-2px);
}

.btn--secondary {
  background-color: var(--color-bg-card);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--secondary:hover {
  background-color: var(--color-bg-hover);
  border-color: var(--color-border-light);
}

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

.btn--outline:hover {
  background-color: var(--color-bg-card);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--large {
  padding: 1rem 2rem;
  font-size: 1.0625rem;
}

/* ==========================================================================
   6. Section Base
   ========================================================================== */

.section {
  padding-block: var(--space-2xl);
}

@media (min-width: 768px) {
  .section {
    padding-block: var(--space-3xl);
  }
}

@media (min-width: 1024px) {
  .section {
    padding-block: var(--space-4xl);
  }
}

.section__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.section__header--center {
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.section__title {
  font-size: var(--fs-h2);
  margin-bottom: var(--space-sm);
}

.section__subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
}

.section__view-all {
  color: var(--color-primary);
  font-weight: 600;
  font-size: var(--fs-body);
}

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

/* ==========================================================================
   7. Age Verification Modal
   ========================================================================== */

.age-gate {
  position: fixed;
  inset: 0;
  z-index: var(--z-age-gate);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.age-gate[hidden] {
  display: none;
}

.age-gate__backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(8px);
}

.age-gate__content {
  position: relative;
  max-width: 480px;
  width: 100%;
  padding: var(--space-2xl);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: var(--shadow-lg), 0 0 64px var(--color-primary-glow);
}

.age-gate__logo {
  margin-bottom: var(--space-xl);
}

.age-gate__title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin-bottom: var(--space-md);
}

.age-gate__text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

.age-gate__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

@media (min-width: 480px) {
  .age-gate__actions {
    flex-direction: row;
    justify-content: center;
  }

  .age-gate__actions .btn {
    flex: 1;
  }
}

.age-gate__disclaimer {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   8. Announcement Bar
   ========================================================================== */

.announcement-bar {
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  color: var(--color-bg);
  font-size: var(--fs-small);
  font-weight: 500;
  position: relative;
  z-index: calc(var(--z-header) + 1);
}

.announcement-bar[hidden] {
  display: none;
}

.announcement-bar .container {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: var(--space-sm);
  gap: var(--space-md);
  position: relative;
}

.announcement-bar__text {
  text-align: center;
  font-weight: 600;
}

.announcement-bar__link {
  text-decoration: underline;
  font-weight: 700;
}

.announcement-bar__close {
  position: absolute;
  right: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-bg);
  opacity: 0.7;
  transition: opacity var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
}

.announcement-bar__close:hover {
  opacity: 1;
}

@media (max-width: 640px) {
  .announcement-bar__text {
    font-size: 0.75rem;
    padding-right: 2rem;
  }
}

/* ==========================================================================
   9. Site Header
   ========================================================================== */

.site-header {
  background-color: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  transition: transform var(--transition-base), background-color var(--transition-base);
}

.site-header.is-hidden {
  transform: translateY(-100%);
}

.site-header.is-scrolled {
  background-color: rgba(19, 19, 26, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-lg);
}

.site-header__logo {
  flex-shrink: 0;
}

.site-header__tools {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.header-tool {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition-fast);
  position: relative;
}

.header-tool:hover {
  background-color: var(--color-bg-hover);
  color: var(--color-primary);
}

.header-tool--cart {
  position: relative;
}

.cart-count {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background-color: var(--color-primary);
  color: var(--color-bg);
  font-size: 10px;
  font-weight: 700;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.header-tool--menu {
  display: flex;
}

@media (min-width: 1024px) {
  .header-tool--menu {
    display: none;
  }
}

/* ==========================================================================
   10. Desktop Navigation
   ========================================================================== */

.site-nav {
  display: none;
}

@media (min-width: 1024px) {
  .site-nav {
    display: block;
    flex: 1;
  }
}

.site-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) 0;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

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

.site-nav__arrow {
  transition: transform var(--transition-fast);
}

.site-nav__item--has-dropdown:hover .site-nav__arrow {
  transform: rotate(180deg);
}

/* Dropdown */
.site-nav__dropdown {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: var(--z-dropdown);
  min-width: 600px;
  padding: var(--space-xl);
}

.site-nav__dropdown--simple {
  min-width: 200px;
  padding: var(--space-md);
}

.site-nav__item--has-dropdown:hover .site-nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

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

.dropdown-col__title {
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.dropdown-col__list li {
  margin-bottom: var(--space-xs);
}

.dropdown-col__list a {
  display: block;
  padding: var(--space-xs) 0;
  color: var(--color-text-secondary);
  font-size: var(--fs-small);
  transition: color var(--transition-fast);
}

.dropdown-col__list a:hover {
  color: var(--color-primary);
}

/* ==========================================================================
   11. Search Bar
   ========================================================================== */

.search-bar {
  background-color: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-md);
}

.search-bar[hidden] {
  display: none;
}

.search-bar__form {
  display: flex;
  gap: var(--space-sm);
  max-width: 800px;
  margin-inline: auto;
}

.search-bar__input {
  flex: 1;
  padding: 0.875rem 1.25rem;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--fs-body);
  transition: border-color var(--transition-fast);
}

.search-bar__input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.search-bar__submit,
.search-bar__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.search-bar__submit:hover {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

.search-bar__close:hover {
  background-color: var(--color-bg-hover);
}

/* ==========================================================================
   12. Mobile Menu
   ========================================================================== */

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-mobile-menu);
  visibility: hidden;
  pointer-events: none;
}

.mobile-menu.is-open {
  visibility: visible;
  pointer-events: auto;
}

.mobile-menu__backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-menu.is-open .mobile-menu__backdrop {
  opacity: 1;
}

.mobile-menu__panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 360px;
  background-color: var(--color-bg-elevated);
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.mobile-menu.is-open .mobile-menu__panel {
  transform: translateX(0);
}

.mobile-menu__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu__close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: background-color var(--transition-fast);
}

.mobile-menu__close:hover {
  background-color: var(--color-bg-hover);
}

.mobile-menu__list {
  padding: var(--space-md);
}

.mobile-menu__list > li > a,
.mobile-menu__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-md);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
  text-align: left;
}

.mobile-menu__list > li > a:hover,
.mobile-menu__toggle:hover {
  background-color: var(--color-bg-hover);
}

.mobile-menu__toggle span {
  font-size: 1.5rem;
  line-height: 1;
  transition: transform var(--transition-fast);
}

.mobile-menu__group.is-open .mobile-menu__toggle span {
  transform: rotate(45deg);
}

.mobile-menu__sublist {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
  padding-left: var(--space-md);
}

.mobile-menu__group.is-open .mobile-menu__sublist {
  max-height: 1000px;
}

.mobile-menu__sublist-title {
  padding: var(--space-md) var(--space-md) var(--space-xs);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.mobile-menu__sublist a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-secondary);
  font-size: var(--fs-small);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.mobile-menu__sublist a:hover {
  background-color: var(--color-bg-hover);
  color: var(--color-primary);
}

/* ==========================================================================
   13. Hero Section
   ========================================================================== */

.hero {
  position: relative;
  padding-block: var(--space-2xl);
  overflow: hidden;
  background-color: var(--color-bg);
}

@media (min-width: 768px) {
  .hero {
    padding-block: var(--space-4xl);
  }
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, var(--color-accent-glow) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, var(--color-primary-glow) 0%, transparent 50%);
  opacity: 0.5;
}

.hero__content {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

@media (min-width: 1024px) {
  .hero__content {
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-4xl);
  }
}

.hero__text {
  text-align: center;
}

@media (min-width: 1024px) {
  .hero__text {
    text-align: left;
  }
}

.hero__eyebrow {
  display: inline-block;
  padding: 0.375rem 1rem;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
  box-shadow: 0 0 20px var(--color-primary-glow);
}

.hero__title {
  font-size: var(--fs-h1);
  margin-bottom: var(--space-lg);
  letter-spacing: -0.03em;
}

.hero__title-accent {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__description {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 520px;
}

@media (max-width: 1023px) {
  .hero__description {
    margin-inline: auto;
  }
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  justify-content: center;
}

@media (min-width: 1024px) {
  .hero__actions {
    justify-content: flex-start;
  }
}

.hero__product {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__product-placeholder {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 5 / 6;
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-bg-elevated));
  border: 2px dashed var(--color-border-light);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  gap: var(--space-sm);
  position: relative;
}

.hero__product-placeholder::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-xl);
  opacity: 0.2;
  z-index: -1;
  filter: blur(20px);
}

.hero__product-placeholder span {
  font-size: 1.25rem;
  font-weight: 600;
}

.hero__product-placeholder small {
  font-size: var(--fs-small);
}

/* ==========================================================================
   14. Trust Bar
   ========================================================================== */

.trust-bar {
  background-color: var(--color-bg-elevated);
  border-block: 1px solid var(--color-border);
  padding-block: var(--space-lg);
}

.trust-bar__list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .trust-bar__list {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .trust-bar__list {
    grid-template-columns: repeat(5, 1fr);
  }
}

.trust-bar__item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.trust-bar__icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.trust-bar__item strong {
  display: block;
  font-size: var(--fs-small);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 2px;
}

.trust-bar__item span {
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
}

/* ==========================================================================
   15. Brand Grid
   ========================================================================== */

.brand-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

@media (min-width: 640px) {
  .brand-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .brand-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

.brand-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-xl) var(--space-md);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  text-align: center;
}

.brand-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 217, 255, 0.1);
}

.brand-card__logo {
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
}

.brand-card__name-large {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.brand-card:hover .brand-card__name-large {
  color: var(--color-primary);
}

.brand-card__count {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

/* ==========================================================================
   16. Product Grid & Card
   ========================================================================== */

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

@media (min-width: 640px) {
  .product-grid {
    gap: var(--space-lg);
  }
}

@media (min-width: 768px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.product-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 217, 255, 0.1);
}

.product-card__link {
  display: block;
  flex: 1;
}

.product-card__image {
  position: relative;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--color-bg-elevated), var(--color-bg-hover));
  overflow: hidden;
}

.product-card__image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--fs-small);
}

.product-card__badge {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  padding: 4px 10px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.product-card__badge--new {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

.product-card__badge--hot {
  background-color: #ff3366;
  color: white;
}

.product-card__badge--sale {
  background-color: var(--color-warning);
  color: var(--color-bg);
}

.product-card__info {
  padding: var(--space-md);
}

.product-card__brand {
  font-size: var(--fs-xs);
  color: var(--color-primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.product-card__name {
  font-size: 1rem;
  margin-block: var(--space-xs);
  color: var(--color-text);
  line-height: 1.3;
}

.product-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-sm);
}

.product-card__tag {
  padding: 2px 8px;
  background-color: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
}

.product-card__price {
  margin-top: var(--space-sm);
}

.product-card__price-current {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.product-card__add-to-cart {
  width: 100%;
  padding: var(--space-md);
  background-color: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  color: var(--color-text);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.product-card__add-to-cart:hover {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

/* ==========================================================================
   17. Category Cards (Puff Count)
   ========================================================================== */

.category-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 1024px) {
  .category-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.category-card {
  position: relative;
  display: block;
  padding: var(--space-2xl);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  min-height: 280px;
  transition: all var(--transition-base);
}

.category-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.category-card__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(168, 85, 247, 0.1) 0%,
    rgba(0, 217, 255, 0.1) 100%);
  opacity: 0.5;
  transition: opacity var(--transition-base);
}

.category-card:hover .category-card__bg {
  opacity: 1;
}

.category-card:nth-child(2) .category-card__bg {
  background: linear-gradient(135deg,
    rgba(0, 217, 255, 0.1) 0%,
    rgba(16, 185, 129, 0.1) 100%);
}

.category-card:nth-child(3) .category-card__bg {
  background: linear-gradient(135deg,
    rgba(168, 85, 247, 0.15) 0%,
    rgba(239, 68, 68, 0.1) 100%);
}

.category-card__content {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.category-card__eyebrow {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.category-card__title {
  font-size: 1.75rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.category-card__desc {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.category-card__cta {
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-fast);
}

/* ==========================================================================
   18. Featured Product Banner
   ========================================================================== */

.featured-product {
  padding-block: var(--space-2xl);
  background: linear-gradient(135deg, var(--color-bg-elevated), var(--color-bg));
  border-block: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .featured-product {
    padding-block: var(--space-3xl);
  }
}

.featured-product__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

@media (min-width: 1024px) {
  .featured-product__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
  }
}

.featured-product__image-placeholder {
  width: 100%;
  aspect-ratio: 1;
  max-width: 600px;
  margin-inline: auto;
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-bg-elevated));
  border: 2px dashed var(--color-border-light);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-weight: 600;
}

.featured-product__label {
  display: inline-block;
  padding: 0.375rem 1rem;
  background-color: var(--color-primary);
  color: var(--color-bg);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}

.featured-product__title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-sm);
}

.featured-product__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.featured-product__features {
  margin-bottom: var(--space-xl);
}

.featured-product__features li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-block: var(--space-sm);
  color: var(--color-text-secondary);
}

.featured-product__features svg {
  flex-shrink: 0;
  color: var(--color-primary);
}

.featured-product__price {
  margin-bottom: var(--space-xl);
}

.featured-product__price-label {
  display: block;
  font-size: var(--fs-small);
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.featured-product__price-current {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
}

/* ==========================================================================
   19. Flavor Grid
   ========================================================================== */

.flavor-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

@media (min-width: 640px) {
  .flavor-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .flavor-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.flavor-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-xl) var(--space-md);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.flavor-card::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.flavor-card--mint::before {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.15));
}

.flavor-card--fruit::before {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.15), rgba(245, 158, 11, 0.15));
}

.flavor-card--berry::before {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.15), rgba(59, 130, 246, 0.15));
}

.flavor-card--tropical::before {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(16, 185, 129, 0.15));
}

.flavor-card--candy::before {
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.15), rgba(168, 85, 247, 0.15));
}

.flavor-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.flavor-card:hover::before {
  opacity: 1;
}

.flavor-card > * {
  position: relative;
}

.flavor-card__icon {
  font-size: 2.5rem;
  line-height: 1;
}

.flavor-card__name {
  font-size: 1rem;
  color: var(--color-text);
}

.flavor-card__arrow {
  color: var(--color-text-muted);
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.flavor-card:hover .flavor-card__arrow {
  color: var(--color-primary);
  transform: translateX(4px);
}

/* ==========================================================================
   20. Why Us Grid
   ========================================================================== */

.why-us-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 640px) {
  .why-us-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .why-us-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.why-us-item {
  text-align: center;
  padding: var(--space-lg);
}

.why-us-item__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  margin-bottom: var(--space-md);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-primary);
  box-shadow: 0 0 32px var(--color-primary-glow);
}

.why-us-item__title {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
}

.why-us-item__text {
  color: var(--color-text-secondary);
  font-size: var(--fs-small);
  line-height: 1.6;
}

/* ==========================================================================
   21. Blog Grid
   ========================================================================== */

.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 640px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.blog-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.blog-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.blog-card__link {
  display: block;
}

.blog-card__image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.blog-card__image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-bg-elevated), var(--color-bg-hover));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--fs-small);
}

.blog-card__content {
  padding: var(--space-lg);
}

.blog-card__meta {
  display: flex;
  gap: var(--space-xs);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.blog-card__title {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
  line-height: 1.3;
}

.blog-card__excerpt {
  color: var(--color-text-secondary);
  font-size: var(--fs-small);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.blog-card__read-more {
  color: var(--color-primary);
  font-weight: 600;
  font-size: var(--fs-small);
}

/* ==========================================================================
   22. Newsletter
   ========================================================================== */

.newsletter {
  padding-block: var(--space-3xl);
  background: linear-gradient(135deg, var(--color-bg-elevated), var(--color-bg));
  position: relative;
  overflow: hidden;
}

.newsletter::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, var(--color-primary-glow) 0%, transparent 50%);
  opacity: 0.3;
}

.newsletter__inner {
  position: relative;
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
}

.newsletter__title {
  font-size: var(--fs-h2);
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.newsletter__description {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  font-size: 1.0625rem;
}

.newsletter__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

@media (min-width: 640px) {
  .newsletter__form {
    flex-direction: row;
  }
}

.newsletter__input {
  flex: 1;
  padding: 1rem 1.25rem;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--fs-body);
  transition: border-color var(--transition-fast);
}

.newsletter__input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.newsletter__disclaimer {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

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

/* ==========================================================================
   23. Site Footer
   ========================================================================== */

.site-footer {
  background-color: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-2xl) var(--space-lg);
}

.site-footer__main {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 640px) {
  .site-footer__main {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .site-footer__main {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
  }
}

.footer-col--brand {
  max-width: 400px;
}

.footer-col--brand .logo-text {
  margin-bottom: var(--space-md);
  display: inline-block;
}

.footer-description {
  color: var(--color-text-secondary);
  font-size: var(--fs-small);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background-color: var(--color-primary);
  color: var(--color-bg);
  border-color: var(--color-primary);
  box-shadow: 0 0 20px var(--color-primary-glow);
}

.footer-col__title {
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.footer-col__list li {
  margin-bottom: var(--space-sm);
}

.footer-col__list a {
  color: var(--color-text-secondary);
  font-size: var(--fs-small);
  transition: color var(--transition-fast);
}

.footer-col__list a:hover {
  color: var(--color-primary);
}

.site-footer__warning {
  padding-block: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.site-footer__warning p {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  text-align: center;
}

.site-footer__warning strong {
  color: var(--color-warning);
}

.site-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.copyright {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

.payment-icons {
  display: flex;
  gap: var(--space-sm);
}

.payment-badge {
  padding: 4px 10px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
  font-weight: 600;
}

/* ==========================================================================
   24. Animations
   ========================================================================== */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}