/* ============================================
   Forest Tea — CSS
   Japanese tea tranquility x snowy mountain scenery
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --color-matcha: #4F6F52;
  --color-matcha-dark: #3D5940;
  --color-matcha-light: #6B8E6E;
  --color-ecru: #F5F1E8;
  --color-ecru-dark: #E8E2D4;
  --color-ink: #1A1A1A;
  --color-ink-light: #4A4A4A;
  --color-vermillion: #B91C1C;
  --color-white: #FFFFFF;
  --color-border: #D4CFC3;
  --color-border-light: #E8E4DA;

  /* Typography */
  --font-display: 'Noto Serif JP', serif;
  --font-body-en: 'Plus Jakarta Sans', sans-serif;
  --font-body-jp: 'Zen Kaku Gothic New', sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 72px;

  /* Transitions */
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body-jp), var(--font-body-en), sans-serif;
  font-weight: 400;
  color: var(--color-ink);
  background-color: var(--color-ecru);
  line-height: 1.8;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--color-matcha);
}

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

ul {
  list-style: none;
}

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

input {
  font-family: inherit;
  font-size: inherit;
}

/* ---------- Utility ---------- */
.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;
}

/* ============================================
   Header
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(245, 241, 232, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border-light);
  height: var(--header-height);
}

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

.header__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header__logo-mark {
  font-size: 1.5rem;
}

.header__logo-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--color-matcha-dark);
  letter-spacing: 0.05em;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.header__nav-link {
  font-family: var(--font-body-jp);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-ink-light);
  position: relative;
  padding: 0.25rem 0;
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-matcha);
  transition: width var(--transition-base);
}

.header__nav-link:hover::after {
  width: 100%;
}

.header__nav-link--cart {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.header__cart-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--color-matcha);
  color: var(--color-white);
  font-size: 0.7rem;
  font-weight: 600;
  font-family: var(--font-body-en);
}

/* Mobile menu button */
.header__menu-btn {
  display: none;
  width: 32px;
  height: 32px;
  position: relative;
}

.header__menu-icon,
.header__menu-icon::before,
.header__menu-icon::after {
  display: block;
  width: 20px;
  height: 1.5px;
  background-color: var(--color-ink);
  transition: transform var(--transition-base);
  position: absolute;
  left: 6px;
}

.header__menu-icon {
  top: 50%;
  transform: translateY(-50%);
}

.header__menu-icon::before {
  content: '';
  top: -6px;
}

.header__menu-icon::after {
  content: '';
  top: 6px;
}

/* ============================================
   Hero
   ============================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
}

.hero__bg-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(26, 26, 26, 0.3) 0%,
    rgba(26, 26, 26, 0.5) 50%,
    rgba(26, 26, 26, 0.6) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 var(--space-md);
}

.hero__tagline {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.15em;
  line-height: 1.5;
  margin-bottom: var(--space-md);
}

.hero__sub {
  font-family: var(--font-body-jp);
  font-size: 1.05rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-xl);
}

.hero__cta {
  display: inline-block;
  padding: 0.9rem 2.5rem;
  border: 1px solid rgba(255, 255, 255, 0.7);
  color: var(--color-white);
  font-family: var(--font-body-jp);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  transition: all var(--transition-base);
}

.hero__cta:hover {
  background-color: var(--color-white);
  color: var(--color-matcha-dark);
  border-color: var(--color-white);
}

/* ============================================
   Products Section
   ============================================ */
.products {
  padding: var(--space-3xl) 0;
}

.products__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.products__header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.products__title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  color: var(--color-matcha-dark);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.products__subtitle {
  font-family: var(--font-body-jp);
  font-size: 0.95rem;
  color: var(--color-ink-light);
  letter-spacing: 0.05em;
}

/* ---------- Category Tabs ---------- */
.category-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-sm);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.category-tabs::-webkit-scrollbar {
  display: none;
}

.category-tabs__btn {
  padding: 0.6rem 1.5rem;
  font-family: var(--font-body-jp);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-ink-light);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-base);
  white-space: nowrap;
  flex-shrink: 0;
}

.category-tabs__btn:hover {
  color: var(--color-matcha);
}

.category-tabs__btn--active {
  color: var(--color-matcha-dark);
  border-bottom-color: var(--color-matcha);
}

/* ---------- Product Grid ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

/* ---------- Product Card ---------- */
.product-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

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

.product-card.is-hidden {
  display: none;
}

.product-card__image-wrap {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.product-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card__image {
  transform: scale(1.05);
}

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

.product-card__name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
  line-height: 1.5;
}

.product-card__desc {
  font-size: 0.85rem;
  color: var(--color-ink-light);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.product-card__meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border-light);
}

.product-card__price {
  font-family: var(--font-body-en);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-matcha-dark);
}

.product-card__weight {
  font-family: var(--font-body-en);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--color-ink-light);
}

/* ============================================
   Featured Product
   ============================================ */
.featured {
  padding: var(--space-2xl) 0;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.featured__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.featured__image-wrap {
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.featured__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.featured__image-wrap:hover .featured__image {
  transform: scale(1.03);
}

.featured__content {
  padding: var(--space-lg) 0;
}

.featured__label {
  display: inline-block;
  font-family: var(--font-body-jp);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-vermillion);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: 1px solid var(--color-vermillion);
  padding: 0.25rem 0.75rem;
  margin-bottom: var(--space-md);
}

.featured__name {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: 0.1em;
  line-height: 1.4;
  margin-bottom: var(--space-md);
}

.featured__story {
  font-size: 0.95rem;
  color: var(--color-ink-light);
  line-height: 2;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.03em;
}

.featured__meta {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
}

.featured__price {
  font-family: var(--font-body-en);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-matcha-dark);
}

.featured__weight {
  font-family: var(--font-body-jp);
  font-size: 0.85rem;
  color: var(--color-ink-light);
}

.featured__cta {
  display: inline-block;
  padding: 0.85rem 2.5rem;
  background-color: var(--color-matcha);
  color: var(--color-white);
  font-family: var(--font-body-jp);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  transition: all var(--transition-base);
}

.featured__cta:hover {
  background-color: var(--color-matcha-dark);
  color: var(--color-white);
}

/* ============================================
   Newsletter
   ============================================ */
.newsletter {
  padding: var(--space-3xl) 0;
  text-align: center;
}

.newsletter__inner {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.newsletter__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-matcha-dark);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.newsletter__desc {
  font-size: 0.9rem;
  color: var(--color-ink-light);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.newsletter__form {
  display: flex;
  gap: var(--space-xs);
}

.newsletter__input {
  flex: 1;
  padding: 0.85rem 1.25rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-white);
  color: var(--color-ink);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-base);
}

.newsletter__input::placeholder {
  color: var(--color-border);
}

.newsletter__input:focus {
  border-color: var(--color-matcha);
}

.newsletter__btn {
  padding: 0.85rem 1.75rem;
  background-color: var(--color-matcha);
  color: var(--color-white);
  font-family: var(--font-body-jp);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: background-color var(--transition-base);
  white-space: nowrap;
}

.newsletter__btn:hover {
  background-color: var(--color-matcha-dark);
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background-color: var(--color-ink);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-xl) 0 var(--space-lg);
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.footer__logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-white);
  display: block;
  margin-bottom: var(--space-xs);
}

.footer__tagline {
  font-size: 0.8rem;
  opacity: 0.6;
  letter-spacing: 0.05em;
}

.footer__nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
}

.footer__nav-link {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-base);
}

.footer__nav-link:hover {
  color: var(--color-white);
}

.footer__sns {
  display: flex;
  gap: var(--space-md);
  justify-content: flex-end;
}

.footer__sns-link {
  font-family: var(--font-body-en);
  font-size: 0.8rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-base);
}

.footer__sns-link:hover {
  color: var(--color-white);
}

.footer__copyright {
  grid-column: 1 / -1;
  text-align: center;
  font-family: var(--font-body-en);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.3);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: var(--space-sm);
}

/* ============================================
   Media Queries — Tablet (768px)
   ============================================ */
@media screen and (max-width: 768px) {
  :root {
    --space-xl: 3rem;
    --space-2xl: 4.5rem;
    --space-3xl: 6rem;
  }

  /* Header */
  .header__nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-ecru);
    z-index: 99;
    padding: var(--space-xl) var(--space-md);
  }

  .header__nav.is-open {
    display: block;
  }

  .header__nav-list {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .header__nav-link {
    font-size: 1.1rem;
  }

  .header__menu-btn {
    display: block;
  }

  /* Hero */
  .hero__tagline {
    font-size: 2.25rem;
  }

  .hero__sub {
    font-size: 0.95rem;
  }

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

  /* Category Tabs */
  .category-tabs {
    justify-content: flex-start;
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  /* Featured */
  .featured__inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .featured__content {
    padding: 0;
  }

  .featured__name {
    font-size: 1.5rem;
  }

  /* Footer */
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    text-align: center;
  }

  .footer__nav-list {
    justify-content: center;
  }

  .footer__sns {
    justify-content: center;
  }
}

/* ============================================
   Media Queries — Mobile (480px)
   ============================================ */
@media screen and (max-width: 480px) {
  :root {
    --space-xl: 2.5rem;
    --space-2xl: 3.5rem;
    --space-3xl: 4.5rem;
  }

  /* Hero */
  .hero {
    min-height: 500px;
  }

  .hero__tagline {
    font-size: 1.75rem;
    letter-spacing: 0.1em;
  }

  .hero__sub {
    font-size: 0.85rem;
  }

  .hero__cta {
    padding: 0.75rem 2rem;
    font-size: 0.85rem;
  }

  /* Products */
  .products__title {
    font-size: 1.5rem;
  }

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

  .category-tabs__btn {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
  }

  /* Featured */
  .featured__label {
    font-size: 0.7rem;
  }

  .featured__name {
    font-size: 1.25rem;
  }

  .featured__story {
    font-size: 0.9rem;
    line-height: 1.8;
  }

  .featured__price {
    font-size: 1.25rem;
  }

  /* Newsletter */
  .newsletter__title {
    font-size: 1.25rem;
  }

  .newsletter__form {
    flex-direction: column;
  }

  .newsletter__btn {
    padding: 0.85rem;
  }

  /* Footer */
  .footer__nav-list {
    flex-direction: column;
    gap: var(--space-sm);
  }
}