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

:root {
  --color-bg: #08090b;
  --color-surface: #0d0f13;
  --color-surface-alt: #16181c;
  --color-surface-elevated: #202327;
  --color-ink: #ffffff;
  --color-muted: #b4b8bf;
  --color-muted-strong: #e4e6ea;
  --color-muted-soft: #7c8088;
  --color-line: #1b1e24;
  --color-line-soft: #1b1e24;
  --color-line-strong: #34373d;
  --color-brand: #2f80ff;
  --color-brand-dark: #1f5fd6;
  --color-brand-soft: #8fb4ff;
  --color-dark: #08090b;
  --color-warn: #f4b400;
  --color-charge: #3ddc84;
  --phase-1: #00e0c6;
  --phase-2: #2f80ff;
  --phase-3: #3ddc84;
  --shadow-soft: none;
  --font-sans: "IBM Plex Sans", "IBM Plex Sans KR", system-ui, -apple-system, sans-serif;
  --font-kr: "IBM Plex Sans KR", "IBM Plex Sans", system-ui, sans-serif;
  --font-display: "Saira", "IBM Plex Sans KR", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;
  --content-width: 1440px;
  --radius: 0;
  --section-padding: 96px;
  --container-padding: 40px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--color-bg);
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--color-bg);
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--color-brand);
  color: #fff;
}

a {
  color: inherit;
}

img,
svg,
video,
iframe {
  max-width: 100%;
}

@keyframes voltflow {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 200% 50%;
  }
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--color-line);
  background: rgba(8, 9, 11, 0.88);
  backdrop-filter: blur(14px);
}

.site-header::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -2px;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, #00e0c6, #2f80ff, #3ddc84, #00e0c6);
  background-size: 200% 100%;
  animation: voltflow 6s linear infinite;
}

.nav-wrap,
.section-inner,
.footer-inner {
  width: min(100% - (var(--container-padding) * 2), var(--content-width));
  margin: 0 auto;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 82px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-line-strong);
  border-radius: 0;
  background: var(--color-surface);
  color: var(--color-brand);
  font-size: 0;
}

.brand-mark::after {
  content: "";
  width: 14px;
  height: 22px;
  background: linear-gradient(180deg, var(--phase-1), var(--phase-2) 52%, var(--phase-3));
  clip-path: polygon(55% 0, 12% 52%, 45% 52%, 30% 100%, 88% 36%, 55% 36%);
}

.brand-logo {
  display: block;
  width: 48px;
  height: 48px;
  flex: none;
}

.brand-text {
  display: grid;
  gap: 3px;
  color: var(--color-ink);
  font-family: var(--font-display);
  line-height: 1;
  text-transform: uppercase;
}

.brand-text small {
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: none;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 22px;
  flex-wrap: wrap;
}

.nav-links a {
  position: relative;
  color: var(--color-muted);
  font-size: 13.5px;
  font-weight: 400;
  text-decoration: none;
  transition: color 0.16s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -28px;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--phase-1), var(--phase-2), var(--phase-3));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--color-ink);
}

.nav-links a:hover::after,
.nav-links a:focus::after {
  transform: scaleX(1);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--color-muted-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  white-space: nowrap;
}

.lang-switch a {
  color: inherit;
  text-decoration: none;
}

.lang-switch a:hover,
.lang-switch a:focus,
.lang-switch .is-active {
  color: var(--color-ink);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 104px;
  background:
    linear-gradient(#12151b 1px, transparent 1px),
    linear-gradient(90deg, #12151b 1px, transparent 1px),
    var(--color-bg);
  background-size: 56px 56px, 56px 56px, auto;
  color: var(--color-ink);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(720px 480px at 82% 18%, rgba(47, 128, 255, 0.18), transparent 70%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.85fr);
  gap: 64px;
  align-items: center;
}

.eyebrow,
.card-kicker,
.section-kicker,
.kicker {
  margin: 0 0 18px;
  color: var(--color-brand-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  line-height: 1.5;
  text-transform: uppercase;
}

.hero h1,
.section-head h2,
.cta h2,
.lesson-head h3,
.panel h2,
h1,
h2,
h3 {
  color: var(--color-ink);
  font-family: var(--font-kr);
  font-weight: 700;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(38px, 5vw, 58px);
  line-height: 1.1;
}

.lead,
.hero .lead {
  max-width: 760px;
  margin: 24px 0 0;
  color: var(--color-muted);
  font-size: clamp(16px, 1.6vw, 20px);
  font-weight: 300;
  line-height: 1.72;
}

.hero-actions,
.cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 22px;
  border: 1px solid var(--color-brand);
  border-radius: 0;
  background: var(--color-brand);
  color: #fff;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.2;
  text-decoration: none;
  text-transform: uppercase;
  transition: border-color 0.18s ease, filter 0.18s ease, transform 0.18s ease;
}

.button:hover,
.button:focus {
  filter: brightness(1.12);
}

.button.secondary {
  border-color: var(--color-line-strong);
  background: transparent;
  color: var(--color-ink);
}

.button.light {
  border-color: #fff;
  background: #fff;
  color: #08090b;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 52px;
  border-top: 1px solid var(--color-line-strong);
}

.hero-stat {
  padding: 26px 24px 0 0;
  border-right: 1px solid var(--color-line-strong);
}

.hero-stat:last-child {
  border-right: 0;
}

.hero-stat strong,
.metric strong {
  display: block;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(30px, 3vw, 42px);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1;
}

.hero-stat span,
.metric span {
  display: block;
  margin-top: 10px;
  color: var(--color-muted-soft);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.55;
}

.visual-frame,
.card-visual,
.feature-visual,
.hero-visual {
  display: grid;
  place-items: center;
  min-height: 360px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: 0;
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.018) 0 2px, transparent 2px 9px),
    linear-gradient(135deg, rgba(47, 128, 255, 0.12), rgba(61, 220, 132, 0.04)),
    var(--color-surface);
  color: var(--color-muted-soft);
}

.visual-frame span,
.card-visual span,
.feature-visual span {
  border: 1px solid var(--color-line-strong);
  padding: 9px 12px;
  color: var(--color-muted-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.card-visual img,
.feature-visual img,
.visual-frame img,
.hero-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-grid .hero-visual {
  min-height: 340px;
  border-color: var(--color-line);
}

.section {
  padding: var(--section-padding) 0;
  border-top: 1px solid rgba(27, 30, 36, 0.7);
  background: var(--color-bg);
}

.section.alt,
.customer-band.section,
.sb-demo-hero {
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.015) 0 1px, transparent 1px 8px),
    #0b0c0f;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 44px;
}

.section-head h2 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(28px, 3.4vw, 38px);
  line-height: 1.2;
}

.section-head p {
  max-width: 520px;
  margin: 0;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.7;
}

.business-grid,
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.business-card,
.product-card,
.feature-card,
.lesson,
.sb-panel,
.sb-script-card,
.panel {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 300px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: 0;
  background: var(--color-surface);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.business-card::before,
.product-card::before,
.feature-card::before,
.panel::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--phase-1), var(--phase-2), var(--phase-3));
  opacity: 0.9;
}

.business-card:hover,
.business-card:focus,
.product-card:hover,
.product-card:focus,
.feature-card:hover,
.feature-card:focus {
  border-color: var(--color-line-strong);
  transform: translateY(-4px);
}

.business-card:hover .card-visual,
.business-card:focus .card-visual,
.feature-card:hover .feature-visual,
.feature-card:focus .feature-visual {
  transform: scale(1.02);
}

.business-card > :not(.card-visual),
.product-card > :not(.card-visual),
.feature-card > :not(.feature-visual) {
  margin-right: 24px;
  margin-left: 24px;
}

.business-card .card-kicker,
.product-card .card-kicker,
.feature-card .card-kicker {
  margin-top: 28px;
  margin-bottom: 14px;
}

.card-visual,
.feature-visual {
  min-height: 180px;
  border: 0;
  border-bottom: 1px solid var(--color-line);
  transition: transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.feature-visual {
  min-height: 220px;
}

.business-card h3,
.product-card h3,
.feature-card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 20px;
  line-height: 1.28;
}

.business-card p,
.product-card p,
.feature-card p,
.panel p,
.panel li {
  margin-top: 0;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 15px;
  font-weight: 300;
  line-height: 1.7;
}

.business-card .card-link,
.product-card .card-link,
.feature-card .card-link {
  margin-top: auto;
  margin-bottom: 24px;
  padding-top: 24px;
  color: var(--color-brand-soft);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  transition: color 0.18s ease;
}

.business-card:hover .card-link,
.business-card:focus .card-link,
.product-card:hover .card-link,
.product-card:focus .card-link {
  color: var(--color-ink);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.product-card {
  padding-top: 24px;
}

.product-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 18px 24px 0;
}

.product-tags span,
.notice,
.track-badge,
.badge {
  display: inline-flex;
  width: fit-content;
  border: 1px solid var(--color-line-strong);
  border-radius: 0;
  background: var(--color-surface);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.product-tags span,
.notice {
  padding: 6px 9px;
}

.notice {
  margin-top: 18px;
  border-left: 3px solid var(--color-warn);
  color: #ffd166;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: transparent;
}

.metric {
  min-height: 170px;
  padding: 30px 28px;
  border-left: 1px solid var(--color-line);
  background: rgba(13, 15, 19, 0.5);
}

.metric:last-child {
  border-right: 1px solid var(--color-line);
}

.customer-band {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.customer-band span {
  padding: 10px 14px;
  border: 1px solid var(--color-line);
  border-radius: 0;
  background: var(--color-surface);
  color: var(--color-muted-strong);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.cta {
  position: relative;
  padding: 88px 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 54px),
    linear-gradient(90deg, rgba(13, 15, 19, 0.98), rgba(8, 9, 11, 0.84)),
    var(--color-bg);
  color: var(--color-ink);
}

.cta-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
}

.cta h2 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.14;
}

.cta p {
  max-width: 700px;
  margin: 16px 0 0;
  color: var(--color-muted);
  font-size: 17px;
}

.site-footer {
  padding: 56px 0;
  border-top: 1px solid var(--color-line);
  background: #0b0c0f;
  color: var(--color-muted);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.3fr repeat(4, minmax(150px, 1fr));
  gap: 28px;
}

.footer-title {
  margin: 0 0 10px;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-info {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 0;
}

.footer-info dt {
  color: var(--color-muted-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-info dd {
  margin: 2px 0 0;
}

.footer-links {
  display: grid;
  gap: 9px;
}

.footer-links h3 {
  margin: 0 0 6px;
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 700;
}

.footer-links a {
  color: var(--color-muted);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.16s ease;
}

.footer-links a:hover,
.footer-links a:focus {
  color: var(--color-brand-soft);
}

.copyright {
  margin: 18px 0 0;
  color: var(--color-muted-soft);
  font-size: 13px;
}

.video-embed {
  position: relative;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: 0;
  aspect-ratio: 16 / 9;
  background: #000;
}

.video-embed iframe,
.video-embed video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  object-fit: cover;
}

.track-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.track-badge {
  align-items: center;
  justify-content: center;
  min-width: 40px;
  padding: 6px 12px;
  border-color: var(--color-brand);
  color: var(--color-brand-soft);
}

.lesson {
  display: block;
  min-height: 0;
  padding: 26px;
  margin-bottom: 20px;
}

.lesson-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
}

.lesson-no {
  color: var(--color-brand-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.lesson-head h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.25;
}

.lesson-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 26px;
  align-items: start;
}

.lesson dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 16px;
  margin: 0;
  font-size: 14px;
}

.lesson dt {
  color: var(--color-muted-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.lesson dd {
  margin: 0;
  color: var(--color-muted);
}

.curr-table,
.mini-table {
  width: 100%;
  border-collapse: collapse;
  color: var(--color-muted);
  font-size: 14px;
}

.curr-table th,
.curr-table td,
.mini-table th,
.mini-table td {
  border: 1px solid var(--color-line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

.curr-table th,
.mini-table th {
  background: var(--color-surface-alt);
  color: var(--color-ink);
  font-weight: 700;
}

.callout {
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-brand);
  border-radius: 0;
  padding: 18px 22px;
  background: var(--color-surface);
  color: var(--color-muted);
  font-size: 15px;
}

.sb-demo-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.sb-panel {
  display: block;
  min-height: 0;
  background: var(--color-surface);
}

.sb-panel-head {
  display: grid;
  gap: 6px;
  padding: 24px 24px 0;
}

.sb-panel-head h2,
.sb-panel-head h3 {
  margin: 0;
  color: var(--color-ink);
  font-weight: 700;
  line-height: 1.22;
}

.sb-panel-head p {
  max-width: 820px;
  margin: 0;
  color: var(--color-muted);
  font-size: 15px;
}

.sb-block-board {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px 18px;
  padding: 24px;
}

.sb-script-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.sb-script-card {
  display: block;
  min-height: 0;
  padding: 20px;
  background: var(--color-surface);
}

.sb-script-card h3 {
  margin: 0 0 14px;
  color: var(--color-ink);
  font-size: 18px;
  font-weight: 700;
}

.sb-stack {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  min-width: 0;
}

.sb-block {
  --sb-color: #1e5fa8;
  --sb-dark: #184c86;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  max-width: 100%;
  min-height: 34px;
  margin: 0 0 6px;
  padding: 8px 14px 8px 18px;
  border: 0;
  border-radius: 0;
  background: var(--sb-color);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.25;
  white-space: normal;
}

.sb-block::before,
.sb-block::after {
  content: "";
  position: absolute;
  width: 34px;
  height: 8px;
  background: rgba(255, 255, 255, 0.22);
}

.sb-block::before {
  top: -4px;
  left: 24px;
}

.sb-block::after {
  right: 20px;
  bottom: -5px;
  background: var(--sb-color);
}

.sb-reporter {
  border-radius: 999px;
  padding-inline: 16px;
}

.sb-reporter::before,
.sb-reporter::after,
.sb-hat::before,
.sb-hat::after,
.sb-field::before,
.sb-field::after {
  content: none;
}

.sb-hat {
  min-height: 40px;
  padding-top: 12px;
  border-radius: 0;
  background: var(--sb-color);
}

.sb-hat::marker {
  content: "";
}

.sb-field {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  min-height: 22px;
  padding: 2px 9px;
  border-radius: 999px;
  background: #fff;
  color: #1f2937;
  font-size: 13px;
  font-weight: 800;
  line-height: 1;
}

.sb-dropdown {
  background: var(--sb-dark);
  color: #fff;
}

.sb-scratch {
  --sb-color: #1e5fa8;
  --sb-dark: #184c86;
}

.sb-motion {
  --sb-color: #4c97ff;
  --sb-dark: #3773c2;
}

.sb-motor,
.sb-servo {
  --sb-color: #ffab19;
  --sb-dark: #c77f00;
}

.sb-io,
.sb-voice {
  --sb-color: #ffbf00;
  --sb-dark: #b98700;
  color: #2d2100;
}

.sb-io .sb-dropdown,
.sb-voice .sb-dropdown {
  color: #fff;
}

.sb-sensor {
  --sb-color: #ff8c1a;
  --sb-dark: #c66500;
}

.sb-time {
  --sb-color: #59c059;
  --sb-dark: #3d8d3d;
}

.sb-basic {
  --sb-color: #f2a51a;
  --sb-dark: #b97700;
}

.sb-neutral {
  --sb-color: #8f99a8;
  --sb-dark: #687180;
}

.sb-condition {
  display: grid;
  grid-template-columns: auto;
  gap: 7px;
  min-width: min(100%, 300px);
  padding-bottom: 13px;
}

.sb-condition-main {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.sb-nest {
  margin-left: 22px;
  padding-left: 14px;
  border-left: 10px solid rgba(255, 255, 255, 0.28);
}

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

.sb-kid {
  --sb-color: #4a90ff;
  --sb-dark: #2f68bd;
  min-height: 54px;
  gap: 10px;
  padding: 9px 16px 9px 12px;
  border-radius: 0;
  font-size: 15px;
}

.sb-kid::before {
  left: 42px;
}

.sb-kid-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex: none;
  border-radius: 0;
  background: rgba(255, 255, 255, 0.22);
}

.sb-kid-icon svg {
  display: block;
  width: 28px;
  height: 28px;
}

.sb-kid-stop {
  --sb-color: #ff6b6b;
}

.sb-kid-led-on {
  --sb-color: #ffc700;
  color: #2d2100;
}

.sb-kid-led-off {
  --sb-color: #888888;
}

.sb-note {
  margin: 0;
  color: var(--color-muted-soft);
  font-size: 13px;
}

.page-shell {
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-muted);
}

.onepager {
  border: 1px solid var(--color-line);
  background: var(--color-surface);
}

.tagline,
.summary {
  color: var(--color-muted);
}

.photo-slot {
  display: grid;
  place-items: center;
  border: 1px solid var(--color-line);
  background:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.018) 0 2px, transparent 2px 9px),
    var(--color-surface-alt);
  color: var(--color-muted-soft);
}

.photo-slot strong {
  color: var(--color-ink);
}

.spec-row,
.content-grid,
.positioning,
.footer-strip {
  display: grid;
  gap: 16px;
}

.badge {
  display: grid;
  width: auto;
  padding: 14px;
}

.badge span,
.positioning span,
.footer-mark {
  color: var(--color-brand-soft);
}

.badge strong,
.positioning strong,
.footer-strip strong {
  color: var(--color-ink);
}

.panel {
  display: block;
  min-height: 0;
  padding: 24px;
}

.panel.blue,
.panel.dark {
  border-color: var(--color-line-strong);
  background: var(--color-surface-alt);
}

.code-list,
.curriculum-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 18px;
  color: var(--color-muted);
}

.positioning div {
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  padding: 14px;
}

@media (max-width: 1120px) {
  .hero-grid,
  .cta-grid,
  .lesson-grid {
    grid-template-columns: 1fr;
  }

  .business-grid,
  .metrics,
  .product-grid,
  .feature-grid,
  .track-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sb-script-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  :root {
    --container-padding: 20px;
    --section-padding: 64px;
  }

  .nav-wrap {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
    min-height: 0;
    padding: 16px 0 18px;
  }

  .nav-links {
    justify-content: flex-start;
    gap: 12px 16px;
  }

  .nav-links a::after {
    bottom: -5px;
  }

  .hero {
    padding: 64px 0 58px;
  }

  .hero-stats,
  .business-grid,
  .product-grid,
  .feature-grid,
  .metrics,
  .footer-inner,
  .footer-info,
  .track-grid {
    grid-template-columns: 1fr;
  }

  .hero-stat,
  .metric,
  .metric:last-child {
    border-right: 0;
    border-left: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .hero-stat:last-child,
  .metric:last-child {
    border-bottom: 0;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .visual-frame,
  .hero-grid .hero-visual {
    min-height: 260px;
  }

  .sb-block-board,
  .sb-panel-head {
    padding-inline: 18px;
  }

  .sb-block {
    font-size: 13px;
  }
}

/* 한글 자연스러운 줄바꿈 — 어절(의미단위) 유지, 긴 단어만 강제 줄바꿈 */
body, h1, h2, h3, h4, h5, h6, p, li, a, span, small, strong, em, td, th, figcaption, blockquote, dt, dd, label, button {
  word-break: keep-all;
  overflow-wrap: break-word;
}

/* ══════════════════════════════════════════════════════════════════════
   모바일 반응형 보강 (2026-07 추가)
   본문 다단 그리드·고정폭이 페이지에 인라인 style 로 박혀 있어, 위의
   클래스 기반 미디어쿼리로는 덮이지 않는다. 속성선택자 + !important 로
   모바일(≤720px)에서 강제로 1열·유연폭 처리해 가로 넘침을 없앤다.
   ══════════════════════════════════════════════════════════════════════ */
@media (max-width: 720px) {
  /* 인라인 다단 그리드 → 세로 1열 */
  [style*="grid-template-columns"] { grid-template-columns: 1fr !important; }

  /* 인라인 고정 픽셀 폭 → 화면폭에 맞춤 */
  [style*="width:620px"], [style*="width: 620px"],
  [style*="width:920px"], [style*="width: 920px"],
  [style*="width:720px"], [style*="width: 720px"],
  [style*="width:520px"], [style*="width: 520px"] {
    width: 100% !important;
    max-width: 100% !important;
  }

  /* 이미지·미디어 가로 넘침 방지 */
  img, svg, video, iframe { max-width: 100% !important; height: auto !important; }

  /* 넓은 표는 가로 스크롤 컨테이너로 (내용 잘림 방지) */
  table { display: block; max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }

  /* 페이지 전체 가로 스크롤 원천 차단 */
  html, body { overflow-x: hidden; }

  /* flex 가로줄이 안 접혀 넘치는 경우 방어 */
  [style*="display:flex"]:not([style*="flex-direction:column"]),
  [style*="display: flex"]:not([style*="flex-direction: column"]) { flex-wrap: wrap; }
}