/* ============================================================
   ENSOL LABS — Global Stylesheet
   Primary: #4DB8A0  |  Google Fonts: Inter + Noto Sans KR
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

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

:root {
  --primary:        #4DB8A0;
  --primary-dark:   #3a9e88;
  --primary-light:  #e8f7f4;
  --primary-glow:   rgba(77,184,160,.18);
  --accent:         #2D9CDB;
  --text-dark:      #1a2332;
  --text-mid:       #4a5568;
  --text-light:     #7a8ba0;
  --bg-white:       #ffffff;
  --bg-soft:        #f7fbfa;
  --bg-card:        #ffffff;
  --border:         #e2eceb;
  --radius-sm:      8px;
  --radius-md:      14px;
  --radius-lg:      22px;
  --radius-xl:      32px;
  --shadow-sm:      0 2px 8px rgba(0,0,0,.06);
  --shadow-md:      0 6px 24px rgba(0,0,0,.09);
  --shadow-lg:      0 16px 48px rgba(0,0,0,.12);
  --shadow-primary: 0 8px 32px rgba(77,184,160,.28);
  --transition:     .22s cubic-bezier(.4,0,.2,1);
  --max-w:          1140px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans KR', 'Inter', sans-serif;
  background: var(--bg-soft);
  color: var(--text-dark);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Layout ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Header / Nav ─────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 12px rgba(0,0,0,.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 6px;
  cursor: default;
}

.brand .logo {
  font-family: 'Inter', sans-serif;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -.5px;
  color: var(--primary);
  background: linear-gradient(135deg, var(--primary), #2abf9e);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand .small {
  font-size: .65rem;
  font-weight: 500;
  color: var(--text-light);
  letter-spacing: .04em;
  -webkit-text-fill-color: var(--text-light);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  font-size: .88rem;
  font-weight: 500;
  color: var(--text-mid);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-links a.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 700;
}

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  border: none;
  background: none;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Hero Section ─────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding: 80px 0 72px;
  text-align: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #e6f9f5 0%, #f0fdf9 50%, #e8f4fc 100%);
  z-index: 0;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .55;
}
.hero-blob-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #4DB8A0 0%, transparent 70%);
  top: -200px; left: -150px;
  opacity: .12;
}
.hero-blob-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #2D9CDB 0%, transparent 70%);
  bottom: -180px; right: -100px;
  opacity: .1;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 99px;
  margin-bottom: 20px;
  border: 1px solid rgba(77,184,160,.25);
}

.hero h1 {
  font-family: 'Inter', sans-serif;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.03em;
  color: var(--text-dark);
  margin-bottom: 18px;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--primary), #2abf9e, #2D9CDB);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-mid);
  max-width: 540px;
  margin: 0 auto 32px;
  line-height: 1.75;
}

.hero-cta-group {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Inter', 'Noto Sans KR', sans-serif;
  font-size: .9rem;
  font-weight: 600;
  padding: 12px 26px;
  border-radius: 99px;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #3aa88e);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(77,184,160,.38);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

/* ── Section wrapper ──────────────────────────────────────── */
.section-wrapper {
  padding: 64px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-family: 'Inter', sans-serif;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -.03em;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.section-header p {
  font-size: .95rem;
  color: var(--text-mid);
  max-width: 500px;
  margin: 0 auto;
}

/* ── App Cards (Apps page) ────────────────────────────────── */
.apps-grid {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.app-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.app-card-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 420px;
}

.app-card.reverse .app-card-inner {
  direction: rtl;
}
.app-card.reverse .app-card-inner > * {
  direction: ltr;
}

/* Visual side */
.app-card-visual {
  position: relative;
  overflow: hidden;
  min-height: 320px;
}

.app-card-visual-bg {
  position: absolute;
  inset: 0;
  transition: transform .5s ease;
}

.app-card:hover .app-card-visual-bg {
  transform: scale(1.04);
}

.app-card-visual-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.app-card-visual-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(77,184,160,.35) 0%, rgba(45,156,219,.2) 100%);
  mix-blend-mode: multiply;
}

.app-icon-badge {
  position: absolute;
  top: 24px;
  left: 24px;
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  z-index: 2;
}

/* Content side */
.app-card-content {
  padding: 44px 40px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.app-number {
  font-family: 'Inter', sans-serif;
  font-size: .72rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.app-card-content h2 {
  font-family: 'Inter', 'Noto Sans KR', sans-serif;
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -.03em;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.app-subtitle {
  font-size: .82rem;
  color: var(--text-light);
  margin-bottom: 16px;
  font-weight: 500;
  letter-spacing: .04em;
}

.app-desc {
  font-size: .95rem;
  color: var(--text-mid);
  line-height: 1.75;
  margin-bottom: 24px;
}

/* Feature list */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-bottom: 28px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .88rem;
  color: var(--text-mid);
  font-weight: 500;
}

.feature-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  color: var(--primary-dark);
}

/* Disclaimer */
.disclaimer-box {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: #fffbea;
  border: 1px solid #fde68a;
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: .78rem;
  color: #92400e;
  line-height: 1.55;
}

.disclaimer-box svg {
  flex-shrink: 0;
  margin-top: 1px;
  color: #d97706;
}

/* ── Stats row ────────────────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 48px 0;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  font-size: 1.8rem;
  margin-bottom: 10px;
}

.stat-value {
  font-family: 'Inter', sans-serif;
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: .8rem;
  color: var(--text-light);
  font-weight: 500;
}

/* ── CTA Banner ───────────────────────────────────────────── */
.cta-banner {
  background: linear-gradient(135deg, var(--primary) 0%, #3aa88e 50%, #2D9CDB 100%);
  border-radius: var(--radius-xl);
  padding: 56px 40px;
  text-align: center;
  color: #fff;
  margin: 48px 0 64px;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-banner h2 {
  font-family: 'Inter', sans-serif;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  font-size: .95rem;
  opacity: .88;
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-white {
  background: #fff;
  color: var(--primary-dark);
  border: none;
  position: relative;
  z-index: 1;
}
.cta-banner .btn-white:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,.15);
}

/* ── Home Page specific ───────────────────────────────────── */
.home-apps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.home-app-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  cursor: pointer;
  display: block;
}

.home-app-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.home-app-card-thumb {
  position: relative;
  height: 180px;
  overflow: hidden;
}

.home-app-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.home-app-card:hover .home-app-card-thumb img {
  transform: scale(1.06);
}

.home-app-card-thumb-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(26,35,50,.4) 100%);
}

.home-app-icon {
  position: absolute;
  bottom: -18px;
  left: 20px;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  z-index: 2;
}

.home-app-card-body {
  padding: 28px 20px 22px;
}

.home-app-card-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.home-app-card-body p {
  font-size: .83rem;
  color: var(--text-mid);
  line-height: 1.65;
  margin-bottom: 14px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: .72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 99px;
  letter-spacing: .04em;
}

.badge-teal  { background: var(--primary-light); color: var(--primary-dark); }
.badge-blue  { background: #e8f4fd; color: #1d6fa4; }
.badge-amber { background: #fef3c7; color: #92400e; }

/* ── About / Company ──────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-visual {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4/3;
}

.about-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-content h2 {
  font-family: 'Inter', sans-serif;
  font-size: clamp(1.6rem, 2.5vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -.03em;
  color: var(--text-dark);
  margin-bottom: 16px;
}

.about-content p {
  font-size: .95rem;
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: 14px;
}

/* ── Values ───────────────────────────────────────────────── */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.value-icon {
  font-size: 2rem;
  margin-bottom: 14px;
}

.value-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.value-card p {
  font-size: .85rem;
  color: var(--text-mid);
  line-height: 1.7;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  background: var(--text-dark);
  color: rgba(255,255,255,.55);
  padding: 40px 0;
  margin-top: 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  font-family: 'Inter', sans-serif;
  font-size: 1.05rem;
  font-weight: 800;
  color: #fff;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: .82rem;
  color: rgba(255,255,255,.55);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--primary); }

.footer-copy {
  font-size: .78rem;
  width: 100%;
  margin-top: 12px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,.1);
}

/* ── Support / Privacy pages ──────────────────────────────── */
.support-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 32px;
  align-items: start;
  margin-top: 32px;
}

.sidebar-nav {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 80px;
}

.sidebar-nav h3 {
  font-size: .78rem;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.sidebar-nav a {
  display: block;
  padding: 8px 12px;
  font-size: .88rem;
  font-weight: 500;
  color: var(--text-mid);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  margin-bottom: 2px;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: var(--primary-light);
  color: var(--primary-dark);
}

.content-area {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 44px;
  box-shadow: var(--shadow-sm);
}

.content-area h2 {
  font-family: 'Inter', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.content-area .lead {
  font-size: .95rem;
  color: var(--text-mid);
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.content-section {
  margin-bottom: 32px;
}

.content-section h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.content-section p,
.content-section li {
  font-size: .9rem;
  color: var(--text-mid);
  line-height: 1.8;
}

.content-section ul {
  list-style: disc;
  padding-left: 20px;
}

/* ── Divider ──────────────────────────────────────────────── */
hr.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

/* ── Scroll reveal animations ─────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .55s ease, transform .55s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 900px) {
  .app-card-inner,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .app-card.reverse .app-card-inner {
    direction: ltr;
  }

  .app-card-visual {
    min-height: 240px;
  }

  .app-card-content {
    padding: 32px 28px 28px;
  }

  .home-apps-grid {
    grid-template-columns: 1fr;
    max-width: 440px;
    margin: 0 auto;
  }

  .stats-row {
    grid-template-columns: 1fr;
    max-width: 340px;
    margin: 32px auto;
  }

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

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

  .sidebar-nav {
    position: static;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px 16px 16px;
    gap: 2px;
    box-shadow: var(--shadow-md);
  }

  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 16px; }
  .nav-toggle { display: flex; }

  .hero { padding: 56px 0 48px; }

  .app-card-content { padding: 24px 20px 22px; }
  .app-card-content h2 { font-size: 1.5rem; }

  .cta-banner { padding: 40px 24px; }

  .content-area { padding: 28px 22px; }

  .footer-inner { flex-direction: column; align-items: flex-start; }

  .stats-row { grid-template-columns: repeat(3, 1fr); max-width: 100%; }
}