/* =====================
   FONT
===================== */
@font-face {
  font-family: 'NanumSquareNeo';
  src: url('NanumSquareNeo-cBd.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
}

/* =====================
   RESET & BASE
===================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'NanumSquareNeo', 'Inter', sans-serif;
  color: #111;
  background: #fff;
  line-height: 1.6;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* =====================
   TOP BAR
===================== */
#top-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 101;
  background: #111;
  height: 36px;
}

.top-bar-inner {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 28px;
  height: 100%;
}

.top-bar-inner span {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.6);
}

.top-bar-inner svg {
  width: 13px;
  height: 13px;
  color: rgba(255,255,255,0.5);
  flex-shrink: 0;
}

.top-bar-inner a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color 0.2s;
}

.top-bar-inner a:hover {
  color: #fff;
}

/* =====================
   HEADER
===================== */
#header {
  position: fixed;
  top: 36px; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #f0f0f0;
  transition: box-shadow 0.3s;
}

#header.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo-text {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #111;
}

.logo img {
  height: 40px;
  width: auto;
}

.logo-text-link {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 42px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-decoration: none;
  white-space: nowrap;
  background: linear-gradient(180deg, #555 0%, #111 40%, #444 70%, #888 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(1px 1px 0px rgba(255,255,255,0.15));
}

.nav {
  display: flex;
  gap: 40px;
}

.nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: #555;
  letter-spacing: 0.02em;
  transition: color 0.2s;
  position: relative;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: #111;
  transition: width 0.2s;
}

.nav a:hover { color: #111; }
.nav a:hover::after { width: 100%; }

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-header-cta {
  display: inline-block;
  padding: 9px 22px;
  background: #111;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-header-cta:hover {
  background: #333;
}

.lang-dropdown {
  position: relative;
}

.lang-toggle {
  background: none;
  border: 1.5px solid #ddd;
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  color: #555;
  transition: all 0.2s;
  font-family: 'NanumSquareNeo', 'Inter', sans-serif;
}

.lang-toggle:hover {
  border-color: #111;
  color: #111;
}

.lang-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: #fff;
  border: 1px solid #eee;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  list-style: none;
  overflow: hidden;
  min-width: 110px;
  z-index: 200;
}

.lang-menu.open {
  display: block;
}

.lang-menu li {
  padding: 10px 18px;
  font-size: 0.85rem;
  font-weight: 500;
  color: #444;
  cursor: pointer;
  transition: background 0.15s;
}

.lang-menu li:hover {
  background: #f5f5f5;
  color: #111;
}

.lang-menu li.active {
  color: #111;
  font-weight: 600;
}

.menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: #111;
  transition: all 0.3s;
}

/* =====================
   HERO
===================== */
#hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  margin-top: 116px;
  background: #0a0a0a;
  overflow: hidden;
  display: flex;
  align-items: center;
}

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

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  opacity: 0;
  transition: opacity 0.8s ease;
  background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #0a0a0a 100%);
}

.slide:nth-child(1) {
  background-image: url('slide1.png');
  background-size: cover;
  background-position: center;
}

.slide:nth-child(1)::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 1;
}

.slide:nth-child(1) .slide-content {
  z-index: 2;
}

.slide.active { opacity: 1; }

.slide:nth-child(2) {
  background-image: url('av.png');
  background-size: cover;
  background-position: center;
}

.slide:nth-child(2)::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 1;
}

.slide:nth-child(2) .slide-content {
  z-index: 2;
}

.slide:nth-child(3) {
  background-image: url('AI.png');
  background-size: cover;
  background-position: center;
}

.slide:nth-child(3)::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 1;
}

.slide:nth-child(3) .slide-content {
  z-index: 2;
}

.slide-content {
  position: relative;
  z-index: 2;
  padding: 0 10%;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.slide-sub {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
}

.slide-content h1 {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 36px;
  letter-spacing: -0.02em;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  background: #fff;
  color: #111;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 4px;
  transition: all 0.2s;
}

.btn:hover {
  background: #f0f0f0;
  transform: translateY(-1px);
}

.btn-dark {
  background: #111;
  color: #fff;
}

.btn-dark:hover {
  background: #333;
  transform: translateY(-1px);
}

.slide-controls {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 20px;
  z-index: 10;
}

.slide-controls button {
  background: none;
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slide-controls button:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.6);
}

.dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: all 0.3s;
}

.dot.active {
  background: #fff;
  width: 20px;
  border-radius: 3px;
}

/* =====================
   SECTION COMMON
===================== */
section {
  padding: 100px 0;
}

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

.section-tag {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #888;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #111;
}

/* =====================
   SERVICES
===================== */
#services {
  background: #fafafa;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.service-card {
  background: #fff;
  border: 1px solid #eee;
  border-radius: 12px;
  padding: 36px 28px;
  transition: all 0.3s;
  cursor: default;
}

.service-card:hover {
  border-color: #111;
  box-shadow: 0 8px 40px rgba(0,0,0,0.08);
  transform: translateY(-4px);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: #111;
}

.service-icon svg {
  width: 100%;
  height: 100%;
}

.service-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: #111;
}

.service-card p {
  font-size: 0.875rem;
  color: #777;
  line-height: 1.7;
}

/* =====================
   CTA BANNER
===================== */
#cta-banner {
  background: #0a0a0a;
  padding: 120px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

#cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, #1a1a2e 0%, #0a0a0a 70%);
  z-index: 0;
}

.cta-inner {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.cta-sub {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: 24px;
}

#cta-banner h2 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 40px;
}

/* =====================
   ABOUT
===================== */
#about {
  background: #fff;
}

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

.about-text .section-tag {
  text-align: left;
}

.about-text h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 20px;
}

.about-desc {
  font-size: 0.95rem;
  color: #666;
  line-height: 1.8;
  margin-bottom: 32px;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: #f0f0f0;
  border-radius: 16px;
  overflow: hidden;
}

.stat {
  background: #fff;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat:last-child {
  grid-column: 1 / -1;
}

.stat-num {
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #111;
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: #888;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* =====================
   CONTACT
===================== */
#contact {
  background: #fafafa;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  max-width: 1100px;
  margin: 0 auto;
}

.contact-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid #eee;
  border-radius: 12px;
  padding: 28px 24px;
  transition: border-color 0.2s;
}

.contact-item:hover {
  border-color: #ccc;
}

.contact-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: #111;
  margin-top: 2px;
}

.contact-icon svg {
  width: 100%;
  height: 100%;
}

.contact-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #999;
  margin-bottom: 6px;
}

.contact-item a,
.contact-item p:not(.contact-label) {
  font-size: 0.9rem;
  color: #333;
  line-height: 1.6;
}

.contact-item a:hover {
  color: #111;
  text-decoration: underline;
}

/* =====================
   CONTACT FORM
===================== */
.contact-form {
  max-width: 720px;
  margin: 48px auto 0;
  background: #fff;
  border: 1px solid #eee;
  border-radius: 16px;
  padding: 48px 40px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.form-group label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #999;
}

.form-group input,
.form-group textarea {
  padding: 12px 16px;
  border: 1.5px solid #e8e8e8;
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: 'NanumSquareNeo', 'Inter', sans-serif;
  color: #111;
  background: #fafafa;
  transition: border-color 0.2s, background 0.2s;
  resize: none;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: #111;
  background: #fff;
}

.contact-form .btn {
  width: 100%;
  text-align: center;
  padding: 15px;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  font-family: 'NanumSquareNeo', 'Inter', sans-serif;
}

.form-success {
  display: none;
  text-align: center;
  margin-top: 16px;
  font-size: 0.9rem;
  color: #2d7a2d;
  font-weight: 500;
}

.form-success.show {
  display: block;
}

/* =====================
   FADE-IN ANIMATION
===================== */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* =====================
   FOOTER
===================== */
#footer {
  background: #111;
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

#footer .logo-text {
  color: #fff;
  font-size: 1.1rem;
}

#footer p {
  font-size: 0.8rem;
  color: #666;
}

/* =====================
   MOBILE NAV
===================== */
@media (max-width: 768px) {
  .nav {
    display: none;
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 24px;
    gap: 0;
    border-top: 1px solid #f0f0f0;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
  }

  .nav.open { display: flex; }

  .nav a {
    padding: 14px 0;
    border-bottom: 1px solid #f5f5f5;
    font-size: 1rem;
  }

  .nav a::after { display: none; }

  .menu-btn { display: flex; }

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

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }

  .stat:last-child {
    grid-column: unset;
  }

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

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

  .slide-content {
    padding: 0 6%;
  }
}