/* ===========================
   Seoul Glow Studio — Style
   =========================== */

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

:root {
  --white: #FFFFFF;
  --off-white: #FAF9F7;
  --cream: #F5F1EC;
  --tan: #C4A882;
  --tan-light: #D4BFA3;
  --tan-dark: #A8895E;
  --brown: #8B7355;
  --charcoal: #2C2C2C;
  --black: #1A1A1A;
  --text: #333333;
  --text-light: #666666;
  --section-dark: #F0EDE8;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Noto Serif KR', Georgia, serif;

  --nav-height: 72px;
  --container-width: 1200px;
  --radius: 12px;
  --radius-sm: 8px;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section--dark {
  background: var(--section-dark);
}

/* --- Section Headers --- */
.section__label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--tan);
  margin-bottom: 12px;
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 400;
  color: var(--black);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section__divider {
  margin-bottom: 32px;
}

.section__header {
  text-align: center;
  margin-bottom: 60px;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 14px 36px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.btn--primary {
  background: var(--charcoal);
  color: var(--white);
  border-radius: 50px;
}

.btn--primary:hover {
  background: var(--tan-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.btn--outline {
  background: transparent;
  color: var(--charcoal);
  border: 1.5px solid var(--charcoal);
  border-radius: 50px;
}

.btn--outline:hover {
  background: var(--charcoal);
  color: var(--white);
  transform: translateY(-2px);
}

.btn--full {
  width: 100%;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: all var(--transition);
}

.nav--scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
}

.nav__inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  z-index: 1001;
}

.nav__logo img {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  object-fit: cover;
}

.nav__logo span {
  color: var(--white);
  transition: color var(--transition);
}

.nav--scrolled .nav__logo span {
  color: var(--black);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__links a {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.85);
  transition: color var(--transition);
  position: relative;
}

.nav--scrolled .nav__links a {
  color: var(--text);
}

.nav__links a:hover {
  color: var(--tan);
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--tan);
  transition: width var(--transition);
}

.nav__links a:hover::after {
  width: 100%;
}

.nav__cta {
  padding: 8px 24px !important;
  background: var(--tan);
  color: var(--white) !important;
  border-radius: 50px;
}

.nav__cta::after {
  display: none !important;
}

.nav__cta:hover {
  background: var(--tan-dark) !important;
  color: var(--white) !important;
}

.nav--scrolled .nav__cta {
  color: var(--white) !important;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: all var(--transition);
  border-radius: 2px;
}

.nav--scrolled .nav__toggle span {
  background: var(--black);
}

/* --- 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;
  z-index: 0;
}

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

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(26,26,26,0.5) 0%,
    rgba(26,26,26,0.35) 40%,
    rgba(26,26,26,0.55) 100%
  );
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--white);
  padding: 0 24px;
  animation: heroFadeIn 1.2s ease-out;
}

.hero__logo img {
  width: 160px;
  height: 160px;
  border-radius: 16px;
  margin: 0 auto 24px;
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}

.hero__divider {
  margin-bottom: 24px;
  opacity: 0.8;
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 300;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
  line-height: 1.15;
}

.hero__subtitle {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  font-weight: 300;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: 40px;
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.6);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollLine {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* --- About --- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about__image {
  position: relative;
}

.about__image img {
  border-radius: var(--radius);
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
}

.about__image-accent {
  position: absolute;
  top: -16px;
  left: -16px;
  right: 16px;
  bottom: 16px;
  border: 1.5px solid var(--tan);
  border-radius: var(--radius);
  z-index: -1;
  opacity: 0.4;
}

.about__content p {
  color: var(--text-light);
  margin-bottom: 20px;
  font-size: 1rem;
  line-height: 1.8;
}

.about__detail {
  display: flex;
  gap: 48px;
  margin-top: 36px;
  padding-top: 36px;
  border-top: 1px solid rgba(0,0,0,0.08);
}

.about__detail-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.about__detail-number {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 300;
  color: var(--tan);
  line-height: 1;
}

.about__detail-text {
  font-size: 0.8rem;
  color: var(--text-light);
  line-height: 1.4;
}

/* --- Services --- */
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.1);
}

.service-card__image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

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

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

.service-card__icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26,26,26,0.3);
}

.service-card__content {
  padding: 32px;
}

.service-card__title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 400;
  margin-bottom: 12px;
  color: var(--black);
}

.service-card__desc {
  color: var(--text-light);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

/* --- Gallery --- */
.gallery__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 280px;
  gap: 16px;
}

.gallery__item {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
}

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

.gallery__item:hover img {
  transform: scale(1.08);
}

.gallery__overlay {
  position: absolute;
  inset: 0;
  background: rgba(26,26,26,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery__item:hover .gallery__overlay {
  opacity: 1;
}

.gallery__overlay span {
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: 1.5px solid rgba(255,255,255,0.7);
  padding: 8px 20px;
  border-radius: 50px;
}

.gallery__item--tall {
  grid-row: span 2;
}

.gallery__item--wide {
  grid-column: span 2;
}

/* --- Lightbox --- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.lightbox--active {
  opacity: 1;
  visibility: visible;
}

.lightbox__content {
  max-width: 90vw;
  max-height: 90vh;
}

.lightbox__content img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  transform: scale(0.9);
  transition: transform var(--transition);
}

.lightbox--active .lightbox__content img {
  transform: scale(1);
}

.lightbox__close,
.lightbox__prev,
.lightbox__next {
  position: absolute;
  background: none;
  border: none;
  color: rgba(255,255,255,0.8);
  cursor: pointer;
  transition: color var(--transition);
  font-family: var(--font-sans);
}

.lightbox__close:hover,
.lightbox__prev:hover,
.lightbox__next:hover {
  color: var(--white);
}

.lightbox__close {
  top: 24px;
  right: 28px;
  font-size: 2.2rem;
  line-height: 1;
}

.lightbox__prev,
.lightbox__next {
  top: 50%;
  transform: translateY(-50%);
  font-size: 3rem;
  padding: 8px 16px;
}

.lightbox__prev { left: 16px; }
.lightbox__next { right: 16px; }

/* --- Location --- */
.location__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: start;
}

.location__map iframe {
  width: 100%;
  border-radius: var(--radius);
}

.location__block {
  margin-bottom: 32px;
}

.location__block h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--black);
  margin-bottom: 12px;
}

.location__block p {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

.location__block a {
  color: var(--tan-dark);
}

.location__block a:hover {
  color: var(--tan);
}

.location__hours {
  width: 100%;
  border-collapse: collapse;
}

.location__hours td {
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-light);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.location__hours td:first-child {
  font-weight: 500;
  color: var(--text);
  padding-right: 24px;
}

.location__closed td {
  color: var(--text-light);
  opacity: 0.6;
}

/* --- Footer --- */
.footer {
  background: var(--charcoal);
  color: rgba(255,255,255,0.7);
  padding: 80px 0 40px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer__logo {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  object-fit: cover;
  margin-bottom: 16px;
}

.footer__tagline {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
}

.footer__social {
  display: flex;
  gap: 12px;
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.6);
  transition: all var(--transition);
}

.footer__social-link:hover {
  border-color: var(--tan);
  color: var(--tan);
}

.footer__links h4,
.footer__cta h4 {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: 20px;
}

.footer__links li {
  margin-bottom: 10px;
}

.footer__links a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
  transition: color var(--transition);
}

.footer__links a:hover {
  color: var(--tan);
}

.footer__cta p {
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.footer__bottom {
  text-align: center;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.footer__bottom p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
  margin-top: 16px;
}

.footer__divider {
  margin-bottom: 8px;
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .services__grid .service-card:last-child {
    grid-column: span 2;
    max-width: 500px;
    margin: 0 auto;
  }

  .gallery__grid {
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 240px;
  }

  .gallery__item--tall {
    grid-row: span 2;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .section {
    padding: 72px 0;
  }

  /* Mobile nav */
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 0 40px;
    gap: 28px;
    transition: right var(--transition);
    box-shadow: -10px 0 40px rgba(0,0,0,0.1);
  }

  .nav__links--open {
    right: 0;
  }

  .nav__links a {
    color: var(--text) !important;
    font-size: 1.1rem;
  }

  .nav__cta {
    margin-top: 8px;
  }

  .nav--open .nav__toggle span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
    background: var(--black) !important;
  }
  .nav--open .nav__toggle span:nth-child(2) {
    opacity: 0;
  }
  .nav--open .nav__toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
    background: var(--black) !important;
  }

  .nav__backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
  }

  .nav__backdrop--visible {
    opacity: 1;
    visibility: visible;
  }

  /* Hero */
  .hero {
    min-height: 100svh;
  }

  .hero__logo img {
    width: 80px;
    height: 80px;
  }

  .hero__scroll {
    display: none;
  }

  /* About */
  .about__grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about__image {
    order: -1;
  }

  .about__image img {
    aspect-ratio: 16/10;
  }

  .about__image-accent {
    display: none;
  }

  .about__detail {
    gap: 32px;
  }

  /* Services */
  .services__grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .services__grid .service-card:last-child {
    grid-column: span 1;
    max-width: none;
  }

  /* Gallery */
  .gallery__grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 200px;
    gap: 8px;
  }

  .gallery__item--tall {
    grid-row: span 2;
  }

  .gallery__item--wide {
    grid-column: span 2;
  }

  /* Location */
  .location__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .location__map iframe {
    height: 300px;
  }

  /* Footer */
  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer {
    padding: 60px 0 32px;
  }

  /* Lightbox */
  .lightbox__prev,
  .lightbox__next {
    font-size: 2rem;
    padding: 4px 12px;
  }

  .lightbox__prev { left: 4px; }
  .lightbox__next { right: 4px; }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .gallery__grid {
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: 160px;
  }

  .about__detail {
    flex-direction: column;
    gap: 20px;
  }

  .btn {
    padding: 12px 28px;
    font-size: 0.8rem;
  }
}