:root {
  /*
  Design DNA (Fixed)
  Style Preset: Minimal Mobile Studio
  Color Strategy: White Base + Graphite Text + Single Accent (Cobalt Blue)
  Layout Pattern: Compact Card Grid + Floating Section Index
  Section Order: Header -> Hero -> Mobile Game Showcase -> Services -> About -> Contact/Location -> Business Info -> Footer
  Icon Style: Hairline Line Icon (SVG, consistent 2px stroke)
  Background Pattern: Subtle Waveform Lines (SVG, ultra low contrast)
  */
  --white: #ffffff;
  --graphite: #1f2328;
  --muted: #5c646b;
  --cobalt: #1f5bff;
  --border: #e6e9ec;
  --shadow: 0 12px 30px rgba(31, 35, 40, 0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --max: 1120px;
  --gap: 24px;
  --wave: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='420' height='120' viewBox='0 0 420 120'%3E%3Cpath d='M0 60c40-22 80-22 120 0s80 22 120 0 80-22 120 0 80 22 120 0' fill='none' stroke='%23e9edf0' stroke-width='1'/%3E%3Cpath d='M0 90c50-16 100-16 150 0s100 16 150 0 100-16 150 0' fill='none' stroke='%23eef1f4' stroke-width='1'/%3E%3C/svg%3E");
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", "Helvetica Neue", Arial, sans-serif;
}

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

body {
  font-family: var(--font);
  color: var(--graphite);
  background: var(--white);
  line-height: 1.6;
}

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--cobalt);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--cobalt);
  color: var(--white);
  padding: 8px 12px;
  z-index: 100;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
}

.container {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.section {
  padding: 96px 0;
}

.section-head {
  display: grid;
  gap: 12px;
  margin-bottom: 32px;
}

.eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cobalt);
  font-weight: 600;
}

.lead {
  color: var(--muted);
  max-width: 40ch;
}

.section-desc {
  color: var(--muted);
  max-width: 60ch;
}

.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand-name {
  font-size: 1.1rem;
}

.site-nav {
  display: flex;
  gap: 16px;
  justify-content: center;
  font-size: 0.95rem;
}

.site-nav a {
  padding: 6px 10px;
  border-radius: 999px;
}

.site-nav a:hover {
  background: #f2f5f7;
}

.menu-toggle {
  background: none;
  border: 1px solid var(--border);
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: none;
  align-items: center;
  justify-content: center;
}

.burger,
.burger::before,
.burger::after {
  width: 18px;
  height: 2px;
  background: var(--graphite);
  content: "";
  display: block;
  transition: transform 0.2s ease;
}

.burger::before {
  transform: translateY(-6px);
}

.burger::after {
  transform: translateY(4px);
}

.section-index {
  list-style: none;
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.75rem;
}

.section-index a {
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.section-index a.active {
  border-color: var(--cobalt);
  color: var(--cobalt);
  background: rgba(31, 91, 255, 0.08);
}

.hero {
  background: var(--wave);
  background-size: 420px 120px;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
  gap: 48px;
}

.hero-visual img {
  width: 100%;
  max-width: 420px;
  margin-left: auto;
}

.cta-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: var(--cobalt);
  color: var(--white);
  border-color: transparent;
  box-shadow: 0 10px 20px rgba(31, 91, 255, 0.2);
}

.btn.ghost {
  background: transparent;
}

.btn.text {
  border: none;
  padding: 8px 0;
  color: var(--cobalt);
  background: none;
}

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

.card-grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card,
.service-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.card h3 {
  margin-bottom: 8px;
}

.meta,
.muted {
  color: var(--muted);
  font-size: 0.95rem;
}

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

.service-card {
  display: grid;
  gap: 12px;
  align-content: start;
}

.service-card .icon {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
}

.service-card svg {
  width: 20px;
  height: 20px;
  stroke: var(--graphite);
  stroke-width: 2;
  fill: none;
}

.about-grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.contact-grid {
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: start;
}

.contact-card {
  display: grid;
  gap: 12px;
}

.label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.contact-form {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: grid;
  gap: 16px;
  background: #fbfcfd;
}

.contact-form label {
  display: grid;
  gap: 6px;
  font-weight: 600;
  font-size: 0.95rem;
}

.contact-form input,
.contact-form textarea {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-family: var(--font);
}

.form-note {
  font-size: 0.9rem;
  color: var(--muted);
}

.business-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  background: #fbfcfd;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
}

.back-to-top {
  color: var(--cobalt);
  font-weight: 600;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(31, 35, 40, 0.45);
  display: grid;
  place-items: center;
  padding: 20px;
}

.modal-content {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 460px;
  width: 100%;
  box-shadow: var(--shadow);
  display: grid;
  gap: 12px;
}

.modal-close {
  justify-self: end;
  background: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
}

@media (max-width: 860px) {
  .header-inner {
    grid-template-columns: auto auto;
    grid-template-areas:
      "brand toggle"
      "nav nav";
  }

  .brand {
    grid-area: brand;
  }

  .menu-toggle {
    display: inline-flex;
    grid-area: toggle;
  }

  .site-nav {
    grid-area: nav;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    background: var(--white);
    border: 1px solid var(--border);
    padding: 12px;
    border-radius: var(--radius);
  }

  .site-nav.open {
    display: flex;
  }

  .section-index {
    display: none;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 72px 0;
  }

  .hero-grid {
    gap: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}