/* =============================================
   ISAE Brand — Main Stylesheet
   ============================================= */

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

:root {
  --black: #1a1a1a;
  --dark: #2c2c2c;
  --mid: #888;
  --light: #bbb;
  --border: #e8e4df;
  --bg-gray: #f8f6f3;
  --bg-dark: #1e1c1a;
  --accent: #c8b89a;
  --accent-dark: #a89070;
  --white: #fff;
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Noto Sans KR', sans-serif;
  --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  color: var(--black);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; width: 100%; height: 100%; object-fit: cover; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- Typography ---- */
h1, h2, h3 { font-family: var(--font-serif); font-weight: 400; line-height: 1.15; }
h2 { font-size: clamp(1.8rem, 3vw, 2.8rem); }

/* ---- Layout ---- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 40px; }
.section { padding: 100px 0; }
.section--gray { background: var(--bg-gray); }

.section-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 48px;
}
.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mid);
  font-weight: 500;
}
.section-title { font-size: clamp(1.6rem, 2.5vw, 2.4rem); }
.section-more {
  margin-left: auto;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--mid);
  transition: color var(--transition);
  white-space: nowrap;
}
.section-more:hover { color: var(--black); }

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  padding: 14px 36px;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-family: var(--font-sans);
  transition: all var(--transition);
  font-weight: 400;
}
.btn--light {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.7);
  color: var(--white);
}
.btn--light:hover {
  background: var(--white);
  color: var(--black);
  border-color: var(--white);
}
.btn--dark {
  background: var(--black);
  color: var(--white);
  border: 1px solid var(--black);
}
.btn--dark:hover {
  background: transparent;
  color: var(--black);
}
.btn--outline-light {
  border: 1px solid rgba(255,255,255,0.5);
  color: var(--white);
  padding: 12px 32px;
}
.btn--outline-light:hover {
  background: var(--white);
  color: var(--black);
}

/* =============================================
   HEADER
   ============================================= */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition);
}
.header.scrolled {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 var(--border);
}
.header__top {
  background: var(--black);
  color: var(--white);
  text-align: center;
  padding: 10px;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
}
.header__nav {
  display: flex;
  align-items: center;
  padding: 0 40px;
  height: 68px;
  position: relative;
}
.header.scrolled .nav__logo,
.header.scrolled .nav__links a,
.header.scrolled .nav__icons button { color: var(--black); }

/* Logo */
.nav__logo {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  letter-spacing: 0.25em;
  color: var(--white);
  font-weight: 300;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  transition: color var(--transition);
  white-space: nowrap;
}
.header.scrolled .nav__logo { color: var(--black); }

/* Nav Links */
.nav__links {
  display: flex;
  gap: 32px;
  flex: 1;
}
.nav__links--right { justify-content: flex-end; }
.nav__links a {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.9);
  text-transform: uppercase;
  transition: color var(--transition);
  position: relative;
  padding-bottom: 2px;
}
.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: left;
}
.nav__links a:hover::after { transform: scaleX(1); }
.header.scrolled .nav__links a { color: var(--dark); }

/* Icons */
.nav__icons {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav__icons button {
  color: rgba(255,255,255,0.9);
  transition: color var(--transition), transform var(--transition);
  position: relative;
  display: flex;
  align-items: center;
}
.nav__icons button:hover { color: var(--white); transform: scale(1.1); }
.header.scrolled .nav__icons button { color: var(--dark); }
.header.scrolled .nav__icons button:hover { color: var(--black); }

.cart-count {
  position: absolute;
  top: -6px; right: -8px;
  background: var(--accent);
  color: var(--white);
  font-size: 0.6rem;
  width: 16px; height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  color: var(--white);
}
.nav__hamburger span {
  display: block;
  width: 22px; height: 1.5px;
  background: currentColor;
  transition: all var(--transition);
}
.header.scrolled .nav__hamburger { color: var(--dark); }

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0; right: 0;
  background: var(--white);
  border-top: 1px solid var(--border);
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}
.mobile-menu.open { max-height: 400px; }
.mobile-menu ul { padding: 16px 0; }
.mobile-menu li a {
  display: block;
  padding: 14px 40px;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dark);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), color var(--transition);
}
.mobile-menu li a:hover { background: var(--bg-gray); color: var(--black); }

/* =============================================
   HERO
   ============================================= */
.hero {
  height: 100vh;
  min-height: 600px;
  position: relative;
  overflow: hidden;
}
.hero__slides { height: 100%; position: relative; }
.hero__slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero__slide::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.25) 0%, rgba(0,0,0,0.5) 100%);
}
.hero__slide.active { opacity: 1; }

.hero__content {
  position: relative;
  text-align: center;
  color: var(--white);
  padding: 0 20px;
  animation: heroFadeIn 1s ease 0.3s both;
}
@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero__tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  border: 1px solid rgba(255,255,255,0.6);
  padding: 6px 20px;
  margin-bottom: 28px;
}
.hero__title {
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 300;
  line-height: 1.05;
  margin-bottom: 20px;
}
.hero__title em {
  font-style: italic;
  color: rgba(255,255,255,0.85);
}
.hero__sub {
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  margin-bottom: 40px;
  opacity: 0.9;
  font-weight: 300;
}

/* Hero Controls */
.hero__controls {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--white);
}
.hero__prev, .hero__next {
  color: rgba(255,255,255,0.7);
  font-size: 1.2rem;
  padding: 8px;
  transition: color var(--transition);
}
.hero__prev:hover, .hero__next:hover { color: var(--white); }
.hero__dots { display: flex; gap: 8px; align-items: center; }
.dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  transition: all var(--transition);
}
.dot.active {
  width: 24px;
  border-radius: 3px;
  background: var(--white);
}

/* Scroll indicator */
.hero__scroll {
  position: absolute;
  right: 40px;
  bottom: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: rgba(255,255,255,0.7);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}
.hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.7), transparent);
  animation: scrollLine 1.5s ease-in-out infinite;
}
@keyframes scrollLine {
  0%, 100% { transform: scaleY(1); transform-origin: top; }
  50% { transform: scaleY(0.3); transform-origin: top; }
}

/* =============================================
   NOTICE BANNER / MARQUEE
   ============================================= */
.notice-banner {
  background: var(--black);
  padding: 12px 0;
  overflow: hidden;
}
.marquee { overflow: hidden; white-space: nowrap; }
.marquee__inner {
  display: inline-block;
  animation: marquee 30s linear infinite;
  color: var(--accent);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* =============================================
   CATEGORY GRID
   ============================================= */
.category__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  grid-template-rows: auto auto;
  gap: 16px;
}
.category__item {
  position: relative;
  overflow: hidden;
  display: block;
  aspect-ratio: auto;
}
.category__item--large {
  grid-row: 1 / 3;
}
.category__item:not(.category__item--large) {
  height: 280px;
}
.category__item--large .category__img,
.category__item:not(.category__item--large) .category__img {
  height: 100%;
  width: 100%;
  transition: transform 0.6s ease;
}
.category__item--large { min-height: 576px; }

.category__img {
  background-size: cover;
  background-position: center;
  height: 100%;
}
.category__item:hover .category__img {
  transform: scale(1.04);
}
.category__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 32px;
  background: linear-gradient(to top, rgba(0,0,0,0.55) 0%, transparent 50%);
  color: var(--white);
  text-align: center;
}
.category__overlay span {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 300;
  letter-spacing: 0.1em;
}
.category__overlay p {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  opacity: 0.8;
  margin-top: 4px;
}

/* =============================================
   PRODUCT CARDS
   ============================================= */
.products__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px 16px;
}
.product-card { position: relative; }
.product-card__img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3/4;
  background: var(--bg-gray);
  margin-bottom: 16px;
}
.product-card__img-wrap > a img {
  transition: opacity var(--transition), transform 0.6s ease;
}
.product-card__img-hover {
  position: absolute;
  inset: 0;
  opacity: 0;
}
.product-card:hover .product-card__img-wrap > a img:first-child {
  opacity: 0;
}
.product-card:hover .product-card__img-hover { opacity: 1; }
.product-card:hover .product-card__img-wrap > a img:first-child {
  transform: scale(1.04);
}

.product-card__wish {
  position: absolute;
  top: 12px; right: 12px;
  color: var(--dark);
  opacity: 0;
  transition: opacity var(--transition), color var(--transition), transform var(--transition);
  padding: 6px;
  background: rgba(255,255,255,0.9);
  border-radius: 50%;
  display: flex;
}
.product-card:hover .product-card__wish { opacity: 1; }
.product-card__wish:hover { color: #d66; transform: scale(1.15); }

.product-card__badge {
  position: absolute;
  top: 12px; left: 12px;
  background: var(--black);
  color: var(--white);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  padding: 4px 10px;
}
.product-card__badge--hot { background: var(--accent-dark); }

.product-card__brand {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--mid);
  margin-bottom: 4px;
  text-transform: uppercase;
}
.product-card__name {
  font-size: 0.9rem;
  font-weight: 400;
  line-height: 1.4;
  margin-bottom: 8px;
  font-family: var(--font-sans);
}
.product-card__name a:hover { text-decoration: underline; }
.product-card__price { margin-bottom: 10px; font-size: 0.85rem; }
.price { color: var(--black); }
.price--sale { color: #c44; font-weight: 500; }
.price--original {
  color: var(--light);
  text-decoration: line-through;
  margin-left: 6px;
  font-size: 0.8rem;
}
.price--discount {
  color: #c44;
  font-size: 0.75rem;
  margin-left: 4px;
}

.product-card__colors { display: flex; gap: 6px; align-items: center; }
.color-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid var(--white);
  box-shadow: 0 0 0 1px var(--border);
  transition: box-shadow var(--transition), transform var(--transition);
}
.color-dot:hover {
  box-shadow: 0 0 0 2px var(--dark);
  transform: scale(1.2);
}

/* =============================================
   BRAND STORY
   ============================================= */
.brand-story {
  background: var(--bg-dark);
  color: var(--white);
}
.brand-story__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 600px;
}
.brand-story__text {
  padding: 80px 80px 80px 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 24px;
}
.brand-story__text h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  color: var(--white);
}
.brand-story__text p {
  font-size: 0.9rem;
  line-height: 1.9;
  color: rgba(255,255,255,0.65);
  max-width: 400px;
}
.brand-story__img {
  overflow: hidden;
}
.brand-story__img img {
  height: 100%;
  transition: transform 0.8s ease;
}
.brand-story__img:hover img { transform: scale(1.04); }

/* =============================================
   LOOKBOOK GRID
   ============================================= */
.lookbook__grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 320px 320px;
  gap: 16px;
}
.lookbook__item {
  position: relative;
  overflow: hidden;
}
.lookbook__item--tall { grid-row: 1 / 3; }
.lookbook__item--wide {
  grid-column: 2 / 4;
}
.lookbook__item img {
  transition: transform 0.7s ease;
  height: 100%;
}
.lookbook__item:hover img { transform: scale(1.05); }
.lookbook__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.65) 0%, transparent 50%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  color: var(--white);
  opacity: 0;
  transition: opacity var(--transition);
}
.lookbook__item:hover .lookbook__overlay { opacity: 1; }
.lookbook__overlay span {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.8;
}
.lookbook__overlay p {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 300;
  margin-top: 4px;
}

/* =============================================
   FEATURES
   ============================================= */
.features__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}
.feature { padding: 32px 16px; }
.feature__icon {
  margin: 0 auto 20px;
  width: 60px; height: 60px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-dark);
  transition: background var(--transition), border-color var(--transition);
}
.feature:hover .feature__icon {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--white);
}
.feature h3 {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.feature p {
  font-size: 0.8rem;
  color: var(--mid);
  line-height: 1.8;
}

/* =============================================
   SNS FEED
   ============================================= */
.sns__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
}
.sns__item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
}
.sns__item img { transition: transform 0.5s ease; height: 100%; }
.sns__item:hover img { transform: scale(1.08); }
.sns__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
.sns__item:hover .sns__overlay { opacity: 1; }

/* =============================================
   NEWSLETTER
   ============================================= */
.newsletter {
  background: var(--bg-gray);
  padding: 100px 40px;
}
.newsletter__inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: center;
}
.newsletter__text h2 {
  font-size: clamp(1.8rem, 2.8vw, 2.6rem);
  margin: 12px 0 20px;
}
.newsletter__text p {
  font-size: 0.85rem;
  line-height: 1.9;
  color: var(--mid);
}
.newsletter__input-wrap {
  display: flex;
  gap: 0;
  margin-bottom: 16px;
}
.newsletter__input-wrap input {
  flex: 1;
  border: 1px solid var(--border);
  border-right: none;
  padding: 14px 20px;
  font-size: 0.85rem;
  font-family: var(--font-sans);
  outline: none;
  background: var(--white);
  transition: border-color var(--transition);
}
.newsletter__input-wrap input:focus { border-color: var(--black); }
.newsletter__input-wrap .btn {
  padding: 14px 28px;
  white-space: nowrap;
  letter-spacing: 0.1em;
}
.newsletter__agree {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.75rem;
  color: var(--mid);
  cursor: pointer;
}
.newsletter__agree input { width: 14px; height: 14px; accent-color: var(--black); cursor: pointer; }

/* =============================================
   FOOTER
   ============================================= */
.footer { background: var(--bg-dark); color: rgba(255,255,255,0.6); }
.footer__top {
  max-width: 1280px;
  margin: 0 auto;
  padding: 72px 40px 56px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
}
.footer__logo {
  font-family: var(--font-serif);
  font-size: 2rem;
  letter-spacing: 0.25em;
  color: var(--white);
  display: block;
  margin-bottom: 16px;
}
.footer__brand p {
  font-size: 0.8rem;
  line-height: 1.7;
  margin-bottom: 24px;
}
.footer__social { display: flex; gap: 16px; }
.footer__social a {
  color: rgba(255,255,255,0.5);
  transition: color var(--transition);
  display: flex;
}
.footer__social a:hover { color: var(--white); }

.footer__links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.footer__col h4 {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--white);
  font-weight: 500;
  margin-bottom: 20px;
}
.footer__col ul li { margin-bottom: 10px; }
.footer__col ul li a {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition);
}
.footer__col ul li a:hover { color: var(--white); }
.footer__contact p {
  font-size: 0.8rem;
  line-height: 1.7;
  margin-bottom: 12px;
}
.footer__contact strong {
  font-size: 1.1rem;
  color: var(--white);
  font-weight: 400;
}
.footer__hours { font-size: 0.75rem; line-height: 1.8; }
.footer__contact a { color: var(--accent); }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 28px 40px;
  max-width: 1280px;
  margin: 0 auto;
}
.footer__company, .footer__address {
  font-size: 0.72rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.3);
  margin-bottom: 4px;
}
.footer__legal {
  display: flex;
  gap: 24px;
  margin: 16px 0 8px;
}
.footer__legal a {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.45);
  transition: color var(--transition);
}
.footer__legal a:hover { color: var(--white); }
.footer__copy {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.25);
}

/* =============================================
   TOP BUTTON
   ============================================= */
.top-btn {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 44px; height: 44px;
  background: var(--black);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--transition), transform var(--transition);
  z-index: 999;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}
.top-btn.visible { opacity: 1; transform: translateY(0); }
.top-btn:hover { background: var(--accent-dark); transform: translateY(-2px); }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .products__grid { grid-template-columns: repeat(2, 1fr); }
  .features__grid { grid-template-columns: repeat(2, 1fr); }
  .brand-story__text { padding: 60px 48px; }
  .sns__grid { grid-template-columns: repeat(3, 1fr); }
  .footer__links { grid-template-columns: repeat(2, 1fr); gap: 40px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .header__nav { padding: 0 20px; height: 60px; }
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
  .mobile-menu { display: block; }
  .nav__logo { font-size: 1.5rem; }

  .hero__title { font-size: clamp(2.5rem, 10vw, 5rem); }
  .hero__scroll { display: none; }

  .category__grid { grid-template-columns: 1fr 1fr; }
  .category__item--large {
    grid-column: 1 / 3;
    grid-row: auto;
    min-height: 300px;
  }
  .category__item:not(.category__item--large) { height: 200px; }

  .brand-story__inner { grid-template-columns: 1fr; }
  .brand-story__img { height: 300px; }
  .brand-story__text { padding: 48px 24px; }

  .lookbook__grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 200px 200px 200px;
  }
  .lookbook__item--tall { grid-row: auto; }
  .lookbook__item--wide { grid-column: auto; }

  .newsletter__inner { grid-template-columns: 1fr; gap: 40px; }
  .newsletter { padding: 64px 24px; }

  .footer__top { grid-template-columns: 1fr; gap: 40px; padding: 48px 24px 40px; }
  .footer__links { grid-template-columns: repeat(2, 1fr); }
  .footer__bottom { padding: 24px; }

  .sns__grid { grid-template-columns: repeat(3, 1fr); }
  .top-btn { right: 20px; bottom: 24px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .products__grid { grid-template-columns: repeat(2, 1fr); gap: 16px 12px; }
  .newsletter__input-wrap { flex-direction: column; }
  .newsletter__input-wrap input { border-right: 1px solid var(--border); border-bottom: none; }
  .sns__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__links { grid-template-columns: 1fr; }
  .section-header { flex-wrap: wrap; }
  .features__grid { grid-template-columns: 1fr 1fr; gap: 20px; }
}