/* ========================================
   BLISSYS — Dark One-Page Theme
   ======================================== */

:root {
  --bg-primary: #08090d;
  --bg-secondary: #0f1117;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --text-primary: #f0f2f5;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --gradient-start: #6366f1;
  --gradient-end: #8b5cf6;
  --font-sans: 'Inter', 'Noto Sans KR', 'Noto Sans JP', system-ui, sans-serif;
  --header-height: 72px;
  --container: min(1120px, calc(100% - 48px));
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

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

body.lang-ja {
  font-family: 'Noto Sans JP', 'Inter', 'Noto Sans KR', system-ui, sans-serif;
}

body.lang-ko {
  font-family: 'Noto Sans KR', 'Inter', 'Noto Sans JP', system-ui, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

.container {
  width: var(--container);
  margin-inline: auto;
}

/* Background effects */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.gradient-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}

.gradient-orb--1 {
  width: 600px;
  height: 600px;
  top: -200px;
  right: -150px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
}

.gradient-orb--2 {
  width: 500px;
  height: 500px;
  bottom: 10%;
  left: -200px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}

.header.is-scrolled {
  background: rgba(8, 9, 13, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  z-index: 101;
}

.logo__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 700;
}

.logo__text {
  font-size: 0.9375rem;
  letter-spacing: 0.15em;
}

.nav__list {
  display: flex;
  gap: 36px;
}

.nav__link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent-light);
  transition: width var(--transition);
}

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

.nav__link:hover::after {
  width: 100%;
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 101;
}

.lang-switch {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
}

.lang-switch__btn {
  padding: 6px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.05em;
}

.lang-switch__btn.is-active {
  background: var(--accent);
  color: white;
}

.lang-switch__btn:not(.is-active):hover {
  color: var(--text-primary);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  padding: 10px;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle.is-open span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.menu-toggle.is-open span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn--primary {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: white;
  box-shadow: 0 4px 24px var(--accent-glow);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.btn--ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

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

.btn--large {
  padding: 16px 32px;
  font-size: 1rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: var(--header-height);
  z-index: 1;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding-block: 80px 60px;
}

.hero__eyebrow {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 20px;
}

.hero__title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.hero__title span {
  display: block;
}

.hero__title-accent {
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__desc {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 36px;
  line-height: 1.75;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero__visual {
  position: relative;
}

.hero__showcase {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 480px;
  margin-inline: auto;
}

.hero__image-frame {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 4 / 3;
  background: var(--bg-secondary);
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero__image-glow {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 55%,
    rgba(8, 9, 13, 0.55) 100%
  );
  pointer-events: none;
}

.hero__chips {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.hero__chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  transition: transform var(--transition), border-color var(--transition);
}

.hero__chip:hover {
  transform: translateY(-2px);
  border-color: var(--border-hover);
}

.hero__chip img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
}

.hero__chip span {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  line-height: 1.35;
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* Stats */
.stats {
  position: relative;
  z-index: 1;
  border-block: 1px solid var(--border);
  background: var(--bg-secondary);
}

.stats__inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  padding-block: 48px;
}

.stat {
  text-align: center;
}

.stat__value {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat__label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Section head */
.section-head {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: 64px;
}

.section-head__eyebrow {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 16px;
}

.section-head__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-head__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* Services */
.services {
  position: relative;
  z-index: 1;
  padding-block: 120px;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  position: relative;
  padding: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: all var(--transition);
  overflow: hidden;
}

.service-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.service-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.service-card__media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(8, 9, 13, 0.7) 100%);
  pointer-events: none;
}

.service-card__body {
  padding: 28px 36px 36px;
}

.service-card__num {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 1;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 100px;
  background: rgba(8, 9, 13, 0.65);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

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

.service-card__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-light);
  margin-bottom: 24px;
}

.service-card__icon svg {
  width: 22px;
  height: 22px;
}

.service-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.service-card__desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
}

.service-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-card__tags li {
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* About */
.about {
  position: relative;
  z-index: 1;
  padding-block: 120px;
  background: var(--bg-secondary);
  border-block: 1px solid var(--border);
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about__text {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about__features {
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about__feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.about__feature-icon {
  color: var(--accent-light);
  font-size: 0.625rem;
  margin-top: 6px;
}

.about__feature strong {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.about__feature p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.about__frame {
  aspect-ratio: 4/5;
  max-width: 400px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  background: var(--bg-primary);
}

.about__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about__frame-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 32px;
  background: linear-gradient(
    180deg,
    transparent 35%,
    rgba(8, 9, 13, 0.55) 70%,
    rgba(8, 9, 13, 0.92) 100%
  );
  text-align: center;
}

.about__frame::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.06);
  pointer-events: none;
  z-index: 1;
}

.about__brand {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about__tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* Contact */
.contact {
  position: relative;
  z-index: 1;
  padding-block: 120px;
}

.contact__box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  padding: 64px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.06), rgba(139, 92, 246, 0.03));
}

.contact__desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-top: 16px;
  max-width: 480px;
}

.contact__action {
  text-align: center;
  flex-shrink: 0;
}

.contact__email {
  margin-top: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Footer */
.footer {
  position: relative;
  z-index: 1;
  padding-block: 32px;
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer__meta {
  text-align: right;
}

.footer__info,
.footer__copy {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer__info {
  margin-bottom: 4px;
}

.footer__copy {
  margin-top: 4px;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal--delay { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 960px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
  }

  .hero__desc {
    margin-inline: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__showcase {
    max-width: 400px;
  }

  .hero__chips {
    grid-template-columns: 1fr 1fr;
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .about__inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about__frame {
    max-width: 320px;
  }

  .contact__box {
    flex-direction: column;
    text-align: center;
    padding: 48px 32px;
  }

  .contact__desc {
    margin-inline: auto;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
    --container: min(1120px, calc(100% - 32px));
  }

  .nav {
    position: fixed;
    inset: 0;
    background: rgba(8, 9, 13, 0.97);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
  }

  .nav.is-open {
    opacity: 1;
    visibility: visible;
  }

  .nav__list {
    flex-direction: column;
    align-items: center;
    gap: 32px;
  }

  .nav__link {
    font-size: 1.25rem;
  }

  .menu-toggle {
    display: flex;
  }

  .stats__inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero__scroll {
    display: none;
  }

  .services,
  .about,
  .contact {
    padding-block: 80px;
  }

  .section-head {
    margin-bottom: 48px;
  }

  .service-card__body {
    padding: 24px 28px 28px;
  }

  .footer__inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .footer__meta {
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__chips {
    grid-template-columns: 1fr;
  }

  .hero__chip img {
    width: 36px;
    height: 36px;
  }

  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .lang-switch__btn {
    padding: 6px 10px;
  }
}