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

@font-face {
  font-family: 'GmarketSans';
  src: url('./assets/fonts/ttf/GmarketSansTTFMedium.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

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

@font-face {
  font-family: 'Pretendard Variable';
  src: url('../system_design/Pretendard-1.3.9/web/variable/woff2/PretendardVariable.woff2') format('woff2-variations');
  font-weight: 45 920;
  font-style: normal;
  font-display: swap;
}

:root {
  --font-display: 'GmarketSans', 'Pretendard Variable', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-ui: 'Pretendard Variable', 'Pretendard', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-family: var(--font-ui);
  --font-family-core: var(--font-display);
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --clear-0: #ffffff;
  --clear-50: #fbfffc;
  --mist-100: #f3fbf7;
  --mist-200: #e7f6ef;
  --aqua-100: #ddfbf4;
  --aqua-200: #bdf3eb;
  --aqua-300: #95e9df;
  --aqua-500: #4dd7cc;
  --aqua-700: #287a73;
  --aqua-primary: #94e0f8;
  --aqua-primary-hover: #82d8f6;
  --aqua-primary-text: #063445;
  --mint-100: #e7fadf;
  --mint-300: #c9f4b9;
  --aqua-mint-mix: #94e0f8;
  --glass-blue: #c9f2ff;
  --shell-cream: #f6fff0;
  --pearl: #f7fbf8;
  --ink: #222222;
  --ink-soft: #333333;
  --muted: #55585d;
  --faint: #7a8a87;
  --line: rgba(35, 83, 78, 0.13);
  --line-strong: rgba(35, 83, 78, 0.22);

  --surface: rgba(255, 255, 255, 0.74);
  --surface-strong: rgba(255, 255, 255, 0.9);
  --glass-shadow: 0 18px 60px rgba(57, 145, 137, 0.14);
  --soft-shadow: 0 10px 32px rgba(31, 90, 84, 0.09);

  --r-xs: 8px;
  --r-sm: 12px;
  --r-md: 18px;
  --r-lg: 24px;
  --r-xl: 32px;

  --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;

  --fs-12: 12px;
  --fs-14: 14px;
  --fs-16: 16px;
  --fs-18: 18px;
  --fs-20: 20px;
  --fs-24: 24px;
  --fs-28: 28px;
  --fs-32: 32px;
  --fs-36: 36px;
  --fs-40: 40px;
  --fs-48: 48px;

  --lh-120: 1.2;
  --lh-140: 1.4;

  --margin-16: 16px;
  --margin-20: 20px;
  --margin-24: 24px;

  --control-52: 52px;
  --control-48: 48px;
  --control-40: 40px;
  --control-36: 36px;
  --control-24: 24px;

  --t-display: var(--fs-48);
  --t-title: var(--fs-36);
  --t-section: var(--fs-28);
  --t-card: var(--fs-20);
  --t-body: var(--fs-16);
  --t-caption: var(--fs-12);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--clear-50);
  color: var(--ink);
  font-family: var(--font-ui);
}

body {
  margin: 0;
  background: var(--clear-50);
  color: var(--ink);
}

button,
input,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
}

.ds-page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 72px 28px 100px;
}

.ds-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, 0.78fr);
  gap: 34px;
  align-items: stretch;
  min-height: 520px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 48px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: rgba(255,255,255,0.86);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(22px);
}

.eyebrow {
  color: var(--aqua-700);
  font-size: var(--t-caption);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0;
  text-transform: uppercase;
  line-height: var(--lh-140);
  margin-bottom: 18px;
}

.ds-hero h1 {
  font-family: var(--font-display);
  margin: 0 0 22px;
  font-size: var(--t-display);
  line-height: var(--lh-120);
  letter-spacing: 0;
  font-weight: var(--font-weight-medium);
}

.hero-copy p,
.section-lead {
  color: var(--ink-soft);
  font-size: var(--fs-16);
  line-height: var(--lh-140);
  font-weight: 500;
}

.hero-copy p {
  margin: 0;
  max-width: 620px;
}

.hero-visual {
  min-height: 520px;
  border-radius: var(--r-xl);
  overflow: hidden;
  position: relative;
  border: 1px solid var(--line);
  box-shadow: var(--glass-shadow);
  background: var(--aqua-100);
}

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

.hero-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(232,255,248,0.3);
}

.floating-card {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 24px;
  z-index: 1;
  padding: 18px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(255,255,255,0.62);
  background: rgba(255,255,255,0.66);
  backdrop-filter: blur(18px);
  box-shadow: 0 12px 34px rgba(20, 104, 97, 0.16);
}

.floating-card strong {
  display: block;
  color: var(--ink);
  font-size: 18px;
  font-weight: var(--font-weight-semibold);
  margin-bottom: 8px;
}

.floating-card span {
  color: var(--ink-soft);
  font-size: var(--fs-14);
  line-height: var(--lh-140);
}

.section {
  margin-top: 72px;
  padding: 44px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: rgba(255,255,255,0.72);
  box-shadow: var(--soft-shadow);
  backdrop-filter: blur(18px);
}

.section-header {
  display: flex;
  justify-content: space-between;
  gap: var(--margin-24);
  align-items: end;
  margin-bottom: var(--margin-24);
}

.section h2 {
  margin: 0;
  font-size: var(--t-title);
  line-height: var(--lh-120);
  font-weight: var(--font-weight-semibold);
}

.section-lead {
  max-width: 540px;
  margin: 0;
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.colors {
  grid-template-columns: repeat(6, 1fr);
}

.swatch-card {
  min-height: 154px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.72);
}

.swatch {
  height: 68px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(255,255,255,0.78);
}

.swatch-card strong,
.component-card strong {
  display: block;
  margin-top: 13px;
  font-size: var(--fs-14);
  font-weight: var(--font-weight-semibold);
}

.swatch-card code,
.component-card code {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: var(--fs-12);
  line-height: var(--lh-140);
}

.type-grid {
  display: grid;
  gap: 18px;
}

.type-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.type-row span {
  color: var(--muted);
  font-size: var(--t-caption);
}

.type-display {
  font-family: var(--font-display);
  font-size: var(--fs-48);
  line-height: var(--lh-120);
  font-weight: var(--font-weight-medium);
}

.type-title {
  font-size: var(--fs-32);
  line-height: var(--lh-120);
  font-weight: var(--font-weight-semibold);
}

.type-body {
  font-size: var(--fs-16);
  line-height: var(--lh-140);
  font-weight: 500;
  color: var(--ink-soft);
}

.type-scale {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.scale-card {
  min-height: 116px;
  padding: 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.72);
}

.scale-card strong {
  display: block;
  color: var(--ink);
  font-weight: var(--font-weight-semibold);
  line-height: var(--lh-120);
  margin-bottom: 8px;
}

.scale-card span {
  display: block;
  color: var(--muted);
  font-size: var(--fs-12);
  line-height: var(--lh-140);
}

.type-rule-grid,
.token-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.type-rule,
.token-card {
  padding: 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.72);
}

.type-rule strong,
.token-card strong {
  display: block;
  color: var(--ink);
  font-size: var(--fs-16);
  line-height: var(--lh-140);
  font-weight: var(--font-weight-semibold);
  margin-bottom: 8px;
}

.type-rule p,
.token-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: var(--fs-14);
  line-height: var(--lh-140);
  font-weight: 500;
}

.token-values {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.token-values span {
  min-height: var(--control-24);
  display: inline-flex;
  align-items: center;
  padding: 0 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.82);
  color: var(--aqua-700);
  font-size: var(--fs-12);
  font-weight: 500;
}

.texture-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.texture-card {
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--clear-0);
}

.texture-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  display: block;
}

.texture-card div {
  padding: 18px;
}

.texture-card strong {
  display: block;
  font-size: var(--fs-18);
  line-height: var(--lh-140);
  font-weight: var(--font-weight-semibold);
  margin-bottom: 7px;
}

.texture-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: var(--fs-14);
  line-height: var(--lh-140);
}

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

.component-card {
  padding: 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.72);
  min-height: 190px;
}

.button-demo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: var(--control-52);
  padding: 0 20px;
  border: 0;
  border-radius: var(--r-sm);
  background: var(--aqua-primary);
  color: var(--aqua-primary-text);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(148, 224, 248, 0.22);
}

.choice-demo {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: var(--line);
}

.choice-demo button {
  min-height: var(--control-48);
  border: 0;
  background: rgba(255,255,255,0.86);
  color: var(--ink-soft);
}

.choice-demo button.active {
  color: var(--ink);
  background: rgba(236,255,249,0.94);
  box-shadow: inset 0 0 0 2px var(--aqua-700);
}

.field-demo {
  width: 100%;
  min-height: 112px;
  resize: none;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  padding: 16px;
  background: rgba(255,255,255,0.78);
  color: var(--ink);
  outline: none;
  line-height: var(--lh-140);
}

.field-demo:focus {
  border-color: var(--aqua-500);
  box-shadow: 0 0 0 4px rgba(77, 215, 204, 0.18);
}

.flow-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.flow-step {
  position: relative;
  padding: 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.72);
}

.flow-step:not(:last-child)::after {
  content: '>';
  position: absolute;
  right: -12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--aqua-700);
  font-weight: var(--font-weight-semibold);
}

.flow-step span {
  display: inline-flex;
  width: 28px;
  height: 28px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--aqua-100);
  color: var(--aqua-700);
  font-size: 12px;
  font-weight: var(--font-weight-semibold);
  margin-bottom: 14px;
}

.flow-step strong {
  display: block;
  font-size: var(--fs-16);
  font-weight: var(--font-weight-semibold);
  margin-bottom: 8px;
}

.flow-step p {
  margin: 0;
  color: var(--muted);
  font-size: var(--fs-12);
  line-height: var(--lh-140);
}

.rules {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.rule-card {
  padding: 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.72);
}

.rule-card h3 {
  margin: 0 0 14px;
  font-size: var(--fs-20);
  line-height: var(--lh-140);
  font-weight: var(--font-weight-semibold);
}

.rule-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-soft);
  font-size: var(--fs-14);
  line-height: var(--lh-140);
  font-weight: 500;
}

.code-block {
  margin-top: 24px;
  padding: 20px;
  border-radius: var(--r-md);
  background: #102826;
  color: #d9fff6;
  overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: var(--fs-12);
  line-height: var(--lh-140);
}

.source-note {
  margin-top: 30px;
  color: var(--muted);
  font-size: var(--fs-12);
  line-height: var(--lh-140);
}

@media (max-width: 900px) {
  .ds-page {
    padding: 36px 18px 72px;
  }

  .ds-hero,
  .texture-grid,
  .rules {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    padding: 32px;
  }

  .ds-hero h1 { font-size: var(--fs-40); }

  .grid.colors,
  .component-grid,
  .type-scale,
  .type-rule-grid,
  .token-grid,
  .flow-list {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 28px;
  }

  .section-header {
    display: block;
  }

  .section h2 {
    font-size: var(--fs-28);
    margin-bottom: 14px;
  }

  .type-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .flow-step::after {
    display: none;
  }
}