@font-face {
  font-family: "Gmarket Sans";
  src: url("./assets/fonts/GmarketSansTTFLight.ttf") format("truetype");
  font-display: swap;
  font-style: normal;
  font-weight: 300;
}

@font-face {
  font-family: "Gmarket Sans";
  src: url("./assets/fonts/GmarketSansTTFMedium.ttf") format("truetype");
  font-display: swap;
  font-style: normal;
  font-weight: 400;
}

@font-face {
  font-family: "Gmarket Sans";
  src: url("./assets/fonts/GmarketSansTTFBold.ttf") format("truetype");
  font-display: swap;
  font-style: normal;
  font-weight: 700;
}

:root {
  color-scheme: light;
  --surface-canvas: #f5f5f7;
  --surface-primary: #ffffff;
  --surface-paper: #fffcf5;
  --surface-mint: #e7f0ea;
  --text-primary: #13231f;
  --text-secondary: #56625d;
  --text-tertiary: #68716d;
  --accent-primary: #0e493c;
  --accent-hover: #0a3d32;
  --accent-sage: #c7d8cd;
  --border-subtle: #e1e1e5;
  --focus-ring: #0e493c;
  --text-on-accent: #ffffff;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  --type-display: 4rem;
  --type-display-tablet: 3.25rem;
  --type-display-mobile: 2.625rem;
  --type-feature: 1.5rem;
  --type-media: 2rem;
  --type-lead: 1.25rem;
  --type-body: 1.0625rem;
  --type-label: 0.9375rem;
  --type-micro: 0.8125rem;

  --content-max: 1360px;
  --radius-media: 28px;
  --radius-module: 24px;
  --radius-inner: 18px;
  --radius-control: 999px;
  --control-hit: 44px;

  --motion-micro: 140ms;
  --motion-standard: 220ms;
  --depth-hairline: 0 0 0 1px var(--border-subtle);
  --depth-product: 0 18px 60px rgba(19, 35, 31, 0.08);

  --font-display: "Gmarket Sans", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", sans-serif;
  --font-text: "Gmarket Sans", -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", sans-serif;
}

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

html {
  min-width: 320px;
  scroll-behavior: smooth;
  background: var(--surface-canvas);
}

body {
  min-width: 320px;
  min-height: 100dvh;
  margin: 0;
  overflow-x: clip;
  background: var(--surface-canvas);
  color: var(--text-primary);
  font-family: var(--font-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
a {
  font: inherit;
  touch-action: manipulation;
}

button {
  color: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: var(--space-1);
}

.skip-link {
  position: fixed;
  z-index: 20;
  inset: var(--space-3) auto auto var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-control);
  background: var(--accent-primary);
  color: var(--text-on-accent);
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform var(--motion-micro) ease-out;
}

.skip-link:focus {
  transform: translateY(0);
}

.page-shell {
  width: min(100%, calc(var(--content-max) + (var(--space-12) * 2)));
  min-height: 100dvh;
  margin-inline: auto;
  padding-inline: var(--space-12);
  padding-block-end: var(--space-8);
}

.site-header {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand {
  min-height: var(--control-hit);
  display: inline-flex;
  align-items: center;
  color: var(--accent-primary);
  font-family: var(--font-display);
  font-size: var(--type-feature);
  font-weight: 600;
  letter-spacing: -0.05em;
  text-decoration: none;
  transition-property: color, scale;
  transition-duration: var(--motion-micro);
  transition-timing-function: ease-out;
}

.brand:hover {
  color: var(--accent-hover);
}

.brand:active {
  scale: 0.96;
}

.launch-state {
  color: var(--text-tertiary);
  font-size: var(--type-label);
  font-weight: 300;
  letter-spacing: -0.012em;
}

.landing-grid {
  min-height: calc(100dvh - 116px);
  max-height: 880px;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-template-rows: minmax(320px, 1fr) 184px 132px;
  gap: var(--space-4);
}

.hero-copy {
  grid-column: 1 / span 6;
  grid-row: 1;
  align-self: center;
  padding: var(--space-10) var(--space-12) var(--space-12) var(--space-2);
}

.hero-copy h1 {
  max-width: 9.5ch;
  margin: 0;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: var(--type-display);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 1.04;
  text-wrap: balance;
  word-break: keep-all;
}

.hero-copy p {
  max-width: 31rem;
  margin: var(--space-8) 0 0;
  color: var(--text-secondary);
  font-size: var(--type-lead);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.58;
  text-wrap: pretty;
  word-break: keep-all;
}

.action-link {
  min-height: var(--control-hit);
  width: fit-content;
  margin-top: var(--space-8);
  padding-inline: var(--space-5);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  border-radius: var(--radius-control);
  background: var(--accent-primary);
  color: var(--text-on-accent);
  font-size: var(--type-label);
  font-weight: 600;
  letter-spacing: -0.012em;
  text-decoration: none;
  transition-property: background-color, scale;
  transition-duration: var(--motion-micro);
  transition-timing-function: ease-out;
}

.action-link svg {
  width: var(--space-4);
  height: var(--space-4);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--motion-micro) ease-out;
}

.action-link:hover,
.action-link[data-demo-state="hover"] {
  background: var(--accent-hover);
}

.action-link:hover svg,
.action-link[data-demo-state="hover"] svg {
  transform: translateX(var(--space-1));
}

.action-link:active,
.action-link[data-demo-state="active"] {
  scale: 0.96;
}

.action-link[data-demo-state="focus"] {
  outline: 3px solid var(--focus-ring);
  outline-offset: var(--space-1);
}

.feature-module {
  min-width: 0;
  overflow: hidden;
  border-radius: var(--radius-module);
}

.feature-module h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--type-feature);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.2;
  text-wrap: balance;
  word-break: keep-all;
}

.feature-module p {
  margin: var(--space-2) 0 0;
  font-size: var(--type-body);
  font-weight: 400;
  letter-spacing: -0.018em;
  line-height: 1.55;
  text-wrap: pretty;
  word-break: keep-all;
}

.feature-local {
  grid-column: 1 / span 4;
  grid-row: 2;
  padding: var(--space-6) var(--space-8);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-6);
  background: var(--surface-mint);
  color: var(--text-primary);
}

.feature-local p {
  color: var(--text-secondary);
}

.local-mark {
  width: 92px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 1px solid var(--accent-sage);
  border-radius: 50%;
}

.local-mark::before {
  width: 60px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 1px solid var(--accent-primary);
  border-radius: 50%;
  color: var(--accent-primary);
  content: "기기 안";
  font-size: var(--type-micro);
  font-weight: 600;
}

.feature-precision {
  grid-column: 5 / span 2;
  grid-row: 2;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--accent-primary);
  color: var(--text-on-accent);
}

.precision-number {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  font-family: var(--font-display);
  font-size: var(--type-display-tablet);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 0.9;
  font-variant-numeric: tabular-nums;
}

.precision-number span {
  font-size: var(--type-feature);
  letter-spacing: -0.035em;
}

.feature-precision p {
  color: var(--text-on-accent);
  opacity: 0.82;
}

.feature-share {
  grid-column: 1 / span 6;
  grid-row: 3;
  padding: var(--space-5) var(--space-8);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-8);
  background: var(--surface-primary);
  color: var(--text-primary);
  box-shadow: var(--depth-hairline);
}

.feature-share p {
  margin-top: var(--space-1);
  color: var(--text-secondary);
}

.share-mark {
  width: 76px;
  height: 72px;
  color: var(--accent-primary);
}

.share-mark svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.45;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.receipt-media {
  grid-column: 7 / span 6;
  grid-row: 1 / span 3;
  min-width: 0;
  min-height: 0;
  margin: 0;
  display: grid;
  grid-template-columns: minmax(190px, 0.78fr) minmax(280px, 1fr);
  overflow: hidden;
  border-radius: var(--radius-media);
  background: var(--surface-primary);
  box-shadow: var(--depth-product);
}

.media-copy {
  min-width: 0;
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: var(--surface-paper);
}

.media-label {
  margin: 0;
  color: var(--text-tertiary);
  font-size: var(--type-micro);
  font-weight: 300;
  line-height: 1.4;
}

.media-copy h2 {
  max-width: 8ch;
  margin: var(--space-5) 0 0;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: var(--type-media);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.12;
  text-wrap: balance;
  word-break: keep-all;
}

.media-summary {
  margin: var(--space-5) 0 0;
  color: var(--text-secondary);
  font-size: var(--type-body);
  font-weight: 400;
  letter-spacing: -0.018em;
  line-height: 1.55;
  text-wrap: pretty;
  word-break: keep-all;
}

.media-flow {
  width: 100%;
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
}

.media-flow li {
  min-width: 0;
  padding-block: var(--space-3);
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: var(--space-3);
  border-top: 1px solid var(--border-subtle);
}

.media-flow li:last-child {
  border-bottom: 1px solid var(--border-subtle);
}

.media-flow-index {
  padding-top: 2px;
  color: var(--text-tertiary);
  font-size: var(--type-micro);
  font-variant-numeric: tabular-nums;
  font-weight: 300;
  line-height: 1.4;
}

.media-flow li > span:last-child {
  min-width: 0;
}

.media-flow strong,
.media-flow small {
  display: block;
  word-break: keep-all;
}

.media-flow strong {
  color: var(--accent-primary);
  font-size: var(--type-label);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.45;
}

.media-flow small {
  margin-top: var(--space-1);
  color: var(--text-secondary);
  font-size: var(--type-label);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.5;
}

.media-control {
  min-height: var(--control-hit);
  margin-top: auto;
  padding: 0 var(--space-4);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-control);
  background: var(--surface-primary);
  color: var(--accent-primary);
  font-size: var(--type-label);
  font-weight: 600;
  cursor: pointer;
  transition-property: background-color, scale;
  transition-duration: var(--motion-micro);
  transition-timing-function: ease-out;
}

.media-control:hover {
  background: var(--surface-mint);
}

.media-control:active {
  scale: 0.96;
}

.media-control:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.media-control:disabled:hover {
  background: var(--surface-primary);
}

.media-control svg {
  width: var(--space-4);
  height: var(--space-4);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.media-control .icon-play {
  display: none;
  fill: currentColor;
}

.media-control[aria-pressed="true"] .icon-pause {
  display: none;
}

.media-control[aria-pressed="true"] .icon-play {
  display: block;
}

.video-stage {
  position: relative;
  min-width: 0;
  min-height: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: var(--surface-paper);
}

.video-stage video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center top;
  background: var(--surface-paper);
}

.showcase-shell {
  width: min(100%, var(--content-max));
  margin-inline: auto;
  padding: var(--space-12);
}

.showcase-header {
  max-width: 48rem;
  margin-bottom: var(--space-12);
}

.showcase-header h1,
.showcase-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.04em;
}

.showcase-header h1 {
  font-size: var(--type-display-tablet);
}

.showcase-header p {
  color: var(--text-secondary);
  font-size: var(--type-body);
  line-height: 1.55;
}

.showcase-section {
  margin-top: var(--space-12);
}

.showcase-section > h2 {
  margin-bottom: var(--space-6);
  font-size: var(--type-feature);
}

.state-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-6);
}

.state-sample {
  display: grid;
  gap: var(--space-2);
}

.state-sample > span {
  color: var(--text-tertiary);
  font-size: var(--type-micro);
}

.primitive-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-4);
}

.primitive-grid .feature-local,
.primitive-grid .feature-precision,
.primitive-grid .feature-share {
  grid-column: auto;
  grid-row: auto;
  min-height: 184px;
}

.primitive-grid .feature-share {
  grid-column: 1 / -1;
  min-height: 132px;
}

.showcase-media {
  min-height: 680px;
}

@media (max-width: 1180px) {
  .page-shell {
    padding-inline: var(--space-6);
  }

  .landing-grid {
    grid-template-rows: minmax(300px, 1fr) 176px 132px;
  }

  .hero-copy {
    padding-inline-end: var(--space-8);
  }

  .hero-copy h1 {
    font-size: var(--type-display-tablet);
  }

  .receipt-media {
    grid-template-columns: minmax(170px, 0.72fr) minmax(250px, 1fr);
  }

  .media-copy {
    padding: var(--space-6);
  }

  .feature-local,
  .feature-share {
    padding-inline: var(--space-6);
  }

  .local-mark {
    width: 76px;
  }

  .local-mark::before {
    width: 52px;
  }
}

@media (max-width: 900px) {
  .site-header {
    min-height: 76px;
  }

  .landing-grid {
    min-height: 0;
    max-height: none;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: auto;
  }

  .hero-copy,
  .receipt-media,
  .feature-local,
  .feature-precision,
  .feature-share {
    grid-row: auto;
  }

  .hero-copy {
    grid-column: 1 / -1;
    min-height: 440px;
    padding: var(--space-16) var(--space-8);
  }

  .hero-copy h1 {
    font-size: var(--type-display-tablet);
  }

  .receipt-media {
    grid-column: 1 / -1;
    min-height: 760px;
    grid-template-columns: minmax(220px, 0.7fr) minmax(320px, 1fr);
  }

  .feature-local {
    grid-column: 1;
  }

  .feature-precision {
    grid-column: 2;
  }

  .feature-share {
    grid-column: 1 / -1;
  }

}

@media (max-width: 620px) {
  .page-shell {
    padding-inline: var(--space-4);
    padding-block-end: var(--space-4);
  }

  .launch-state {
    max-width: 10rem;
    text-align: end;
  }

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

  .hero-copy,
  .receipt-media,
  .feature-local,
  .feature-precision,
  .feature-share {
    grid-column: 1;
  }

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

  .primitive-grid .feature-share {
    grid-column: auto;
  }

  .hero-copy {
    min-height: 360px;
    padding: var(--space-12) var(--space-3) var(--space-16);
  }

  .hero-copy h1 {
    font-size: var(--type-display-mobile);
  }

  .hero-copy p {
    margin-top: var(--space-6);
    font-size: var(--type-body);
  }

  .action-link {
    margin-top: var(--space-6);
  }

  .receipt-media {
    min-height: 0;
    grid-template-columns: minmax(0, 1fr);
  }

  .media-copy {
    min-height: 0;
    padding: var(--space-8) var(--space-6);
  }

  .media-copy h2 {
    max-width: 12ch;
  }

  .media-summary {
    max-width: 28rem;
  }

  .media-control {
    margin-top: var(--space-8);
  }

  .video-stage {
    aspect-ratio: 720 / 1566;
  }

  .feature-local,
  .feature-precision {
    min-height: 184px;
  }

  .feature-share {
    min-height: 160px;
  }

  .feature-local,
  .feature-share {
    padding: var(--space-6);
  }

  .feature-precision {
    padding: var(--space-6);
  }

  .showcase-shell {
    padding: var(--space-6) var(--space-4);
  }

  .showcase-header h1 {
    font-size: var(--type-display-mobile);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}