:root {
  --color-paper: #ffffff;
  --color-sky: #a8dcf0;
  --color-sky-shadow: #79bedc;
  --color-blue: #24558c;
  --color-ink: #222222;
  --color-muted: #5d6470;
  --color-lime: #c8ff4a;
  --color-yellow: #ffd85a;
  --color-grass: #7cc95e;
  --color-grass-light: #a9e67a;
  --color-soil: #8b5a3c;
  --color-soil-shadow: #69412f;
  --color-error: #b52d3a;

  --font-display: "Galmuri14", "Galmuri11", "Apple SD Gothic Neo", sans-serif;
  --font-body: "Galmuri11", "Galmuri", "Apple SD Gothic Neo", sans-serif;

  --type-logo: clamp(2.5rem, 12vw, 4.75rem);
  --type-title: clamp(1.75rem, 7vw, 2.75rem);
  --type-heading: clamp(1.25rem, 4vw, 1.5rem);
  --type-body: 1rem;
  --type-small: 0.8125rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  --border-pixel: 4px;
  --border-pixel-strong: 6px;
  --corner-action: 8px;
  --shadow-pixel-sm: 2px 2px 0 var(--color-blue);
  --shadow-pixel-md: 8px 8px 0 var(--color-soil-shadow);
  --motion-press: 120ms ease-out;
}

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

html {
  min-inline-size: 20rem;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 100%;
}

body {
  min-block-size: 100dvh;
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-size: var(--type-body);
  line-height: 1.65;
  overflow-x: hidden;
  overflow-wrap: break-word;
  word-break: keep-all;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: var(--color-blue);
  text-underline-offset: 0.2em;
}

svg,
img {
  display: block;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-3);
  inset-inline-start: var(--space-3);
  z-index: 20;
  padding: var(--space-3) var(--space-4);
  border: var(--border-pixel) solid var(--color-blue);
  background: var(--color-lime);
  color: var(--color-ink);
  font-weight: 700;
  transform: translateY(calc(-100% - var(--space-8)));
}

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

.sky-band {
  position: relative;
  min-block-size: 9.5rem;
  overflow: hidden;
  background: var(--color-sky);
  border-block-end: var(--border-pixel) solid var(--color-blue);
}

.sky-band__inner {
  position: relative;
  display: grid;
  min-block-size: 9.5rem;
  inline-size: min(100%, 45rem);
  margin-inline: auto;
  padding: var(--space-8) var(--space-4) var(--space-6);
  place-items: center;
}

.pixel-cloud {
  position: absolute;
  color: var(--color-paper);
  shape-rendering: crispEdges;
}

.pixel-cloud__face {
  fill: var(--color-paper);
}

.pixel-cloud__shadow {
  fill: var(--color-sky-shadow);
}

.pixel-cloud--one {
  inset-block-start: var(--space-3);
  inset-inline-start: -1.25rem;
  inline-size: 5.5rem;
}

.pixel-cloud--two {
  inset-block-start: var(--space-4);
  inset-inline-end: -1rem;
  inline-size: 4.75rem;
}

.pixel-cloud--three {
  inset-block-end: var(--space-2);
  inset-inline-end: 18%;
  inline-size: 3.5rem;
}

.pixel-logo {
  position: relative;
  z-index: 1;
  inline-size: min(100%, 29rem);
  block-size: auto;
  overflow: visible;
  shape-rendering: crispEdges;
}

.pixel-logo__glyphs {
  /* 얇은 stroke는 5×7 픽셀 격자에서 뭉개진다 — 4방향 드롭섀도로 두툼한 아웃라인(Today Land풍) */
  fill: var(--color-paper);
  filter:
    drop-shadow(0.45px 0 0 var(--color-blue))
    drop-shadow(-0.45px 0 0 var(--color-blue))
    drop-shadow(0 0.45px 0 var(--color-blue))
    drop-shadow(0 -0.45px 0 var(--color-blue))
    drop-shadow(0.45px 0.45px 0 var(--color-blue));
}

.pixel-logo__spark--lime {
  fill: var(--color-lime);
}

.pixel-logo__spark--yellow {
  fill: var(--color-yellow);
}

.main-band {
  background: var(--color-paper);
}

.ebook-layout {
  display: grid;
  gap: var(--space-8);
  inline-size: min(100%, 45rem);
  margin-inline: auto;
  padding: var(--space-8) var(--space-4) var(--space-10);
}

.ebook-figure {
  margin: 0;
}

.ebook-frame {
  inline-size: min(44vw, 11rem);
  margin-inline: auto;
  padding: var(--border-pixel-strong);
  background: var(--color-blue);
  clip-path: polygon(
    12px 0,
    calc(100% - 12px) 0,
    calc(100% - 12px) 4px,
    calc(100% - 4px) 4px,
    calc(100% - 4px) 12px,
    100% 12px,
    100% calc(100% - 12px),
    calc(100% - 4px) calc(100% - 12px),
    calc(100% - 4px) calc(100% - 4px),
    calc(100% - 12px) calc(100% - 4px),
    calc(100% - 12px) 100%,
    12px 100%,
    12px calc(100% - 4px),
    4px calc(100% - 4px),
    4px calc(100% - 12px),
    0 calc(100% - 12px),
    0 12px,
    4px 12px,
    4px 4px,
    12px 4px
  );
  filter: drop-shadow(var(--shadow-pixel-md));
}

.ebook-cover {
  inline-size: 100%;
  block-size: auto;
  background: var(--color-paper);
  clip-path: polygon(
    6px 0,
    calc(100% - 6px) 0,
    100% 6px,
    100% calc(100% - 6px),
    calc(100% - 6px) 100%,
    6px 100%,
    0 calc(100% - 6px),
    0 6px
  );
}

.offer-panel {
  min-inline-size: 0;
}

.offer-label {
  display: inline-block;
  margin: 0 0 var(--space-3);
  padding: var(--space-1) var(--space-2);
  background: var(--color-lime);
  color: var(--color-ink);
  font-size: var(--type-small);
  font-weight: 700;
  line-height: 1.5;
}

h1,
h2,
p {
  margin-block-start: 0;
}

h1 {
  max-inline-size: 13ch;
  margin-block-end: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--type-title);
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.offer-description {
  max-inline-size: 36rem;
  margin-block-end: var(--space-5);
  color: var(--color-muted);
}

.lead-form {
  display: grid;
  gap: var(--space-3);
}

.form-summary {
  padding: var(--space-3);
  border: var(--border-pixel) solid var(--color-error);
  background: var(--color-paper);
  color: var(--color-error);
  font-size: var(--type-small);
  font-weight: 700;
}

.form-summary:focus {
  outline: var(--border-pixel) solid var(--color-yellow);
  outline-offset: var(--space-1);
}

.form-field {
  display: grid;
  gap: var(--space-1);
}

.form-field label {
  font-size: var(--type-small);
  font-weight: 700;
}

.form-field input {
  min-block-size: 2.75rem;
  inline-size: 100%;
  padding: var(--space-2) var(--space-3);
  border: var(--border-pixel) solid var(--color-blue);
  border-radius: 0;
  background: var(--color-paper);
  box-shadow: var(--shadow-pixel-sm);
  color: var(--color-ink);
  outline: 0;
}

.form-field input:hover {
  border-color: var(--color-ink);
}

.form-field input:focus-visible {
  outline: var(--border-pixel) solid var(--color-yellow);
  outline-offset: var(--space-1);
}

.form-field input[aria-invalid="true"] {
  border-color: var(--color-error);
  box-shadow: 2px 2px 0 var(--color-error);
}

.field-error {
  margin-block-end: 0;
  color: var(--color-error);
  font-size: var(--type-small);
  font-weight: 700;
  line-height: 1.45;
}

.consent-field {
  display: grid;
  gap: var(--space-1);
}

.consent-label {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 1fr);
  align-items: start;
  min-block-size: 2.75rem;
  color: var(--color-muted);
  cursor: pointer;
  font-size: var(--type-small);
  line-height: 1.55;
}

.consent-label input {
  inline-size: 1.375rem;
  block-size: 1.375rem;
  margin: var(--space-1) 0 0;
  accent-color: var(--color-lime);
  justify-self: center;
}

.consent-label:has(input:focus-visible) {
  outline: var(--border-pixel) solid var(--color-yellow);
  outline-offset: var(--space-1);
}

.consent-label:has(input[aria-invalid="true"]) {
  color: var(--color-error);
}

.pixel-action {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-block-size: 3rem;
  inline-size: 100%;
  margin-block-start: var(--space-1);
  padding: var(--space-2) var(--space-5);
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
  text-decoration: none;
  transform: translate(0, 0);
  transition:
    transform var(--motion-press),
    opacity var(--motion-press);
}

.pixel-action::before,
.pixel-action::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.pixel-action::before {
  z-index: -2;
  inset: 0;
  background: var(--color-blue);
  clip-path: polygon(
    var(--corner-action) 0,
    calc(100% - var(--corner-action)) 0,
    calc(100% - var(--corner-action)) var(--space-1),
    calc(100% - var(--space-1)) var(--space-1),
    calc(100% - var(--space-1)) var(--corner-action),
    100% var(--corner-action),
    100% calc(100% - var(--corner-action)),
    calc(100% - var(--space-1)) calc(100% - var(--corner-action)),
    calc(100% - var(--space-1)) calc(100% - var(--space-1)),
    calc(100% - var(--corner-action)) calc(100% - var(--space-1)),
    calc(100% - var(--corner-action)) 100%,
    var(--corner-action) 100%,
    var(--corner-action) calc(100% - var(--space-1)),
    var(--space-1) calc(100% - var(--space-1)),
    var(--space-1) calc(100% - var(--corner-action)),
    0 calc(100% - var(--corner-action)),
    0 var(--corner-action),
    var(--space-1) var(--corner-action),
    var(--space-1) var(--space-1),
    var(--corner-action) var(--space-1)
  );
  filter: drop-shadow(4px 4px 0 var(--color-blue));
}

.pixel-action::after {
  z-index: -1;
  inset: var(--border-pixel);
  background: var(--color-lime);
  clip-path: polygon(
    var(--space-1) 0,
    calc(100% - var(--space-1)) 0,
    100% var(--space-1),
    100% calc(100% - var(--space-1)),
    calc(100% - var(--space-1)) 100%,
    var(--space-1) 100%,
    0 calc(100% - var(--space-1)),
    0 var(--space-1)
  );
}

.pixel-action:hover {
  transform: translate(1px, 1px);
}

.pixel-action:active,
.pixel-action.is-active-demo {
  transform: translate(2px, 2px);
}

.pixel-action:active::before,
.pixel-action.is-active-demo::before {
  filter: drop-shadow(var(--shadow-pixel-sm));
}

.pixel-action:focus-visible,
.pixel-action.is-focus-demo {
  outline: var(--border-pixel) solid var(--color-yellow);
  outline-offset: var(--space-1);
}

.pixel-action.is-hover-demo {
  transform: translate(1px, 1px);
}

.download-success {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
  border: var(--border-pixel) solid var(--color-blue);
  background: var(--color-paper);
  box-shadow: 6px 6px 0 var(--color-sky-shadow);
}

.download-success:focus {
  outline: var(--border-pixel) solid var(--color-yellow);
  outline-offset: var(--space-1);
}

.success-marker {
  inline-size: 2.5rem;
  block-size: var(--space-2);
  background: var(--color-lime);
  box-shadow: var(--space-1) var(--space-1) 0 var(--color-blue);
}

.download-success h2 {
  margin-block-end: 0;
  font-family: var(--font-display);
  font-size: var(--type-heading);
  line-height: 1.4;
}

.pixel-action--link {
  margin-block-start: 0;
}

.ground-band {
  position: relative;
  min-block-size: 11rem;
  padding-block-start: 4.5rem;
  overflow: hidden;
  background: var(--color-soil);
  color: var(--color-paper);
}

.ground-band__grass {
  position: absolute;
  inset-block-start: 0;
  inset-inline: 0;
  inline-size: 100%;
  block-size: 2rem;
  color: var(--color-grass);
  shape-rendering: crispEdges;
}

.ground-band__grass-light {
  color: var(--color-grass-light);
}

.ground-sprites {
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 50%;
  inline-size: min(100%, 45rem);
  block-size: 4.5rem;
  transform: translateX(-50%);
  shape-rendering: crispEdges;
}

.sprite-fence {
  fill: var(--color-paper);
  stroke: var(--color-blue);
  stroke-width: 2;
}

.sprite-flower {
  fill: var(--color-lime);
}

.sprite-flower__center {
  fill: var(--color-yellow);
}

.sprite-soil {
  fill: var(--color-soil-shadow);
}

.ground-band__content {
  position: relative;
  display: grid;
  gap: var(--space-1);
  inline-size: min(100%, 45rem);
  margin-inline: auto;
  padding: var(--space-3) var(--space-4) var(--space-6);
  font-size: var(--type-small);
  line-height: 1.55;
}

.ground-band__content p {
  margin-block-end: 0;
}

.primitive-showcase {
  inline-size: min(100%, 45rem);
  margin-inline: auto;
  padding: var(--space-8) var(--space-4) var(--space-12);
}

.showcase-intro {
  display: grid;
  gap: var(--space-2);
  margin-block-end: var(--space-10);
}

.showcase-intro h1,
.showcase-intro p {
  margin-block-end: 0;
}

.showcase-intro h1 {
  max-inline-size: none;
}

.showcase-intro p {
  color: var(--color-muted);
}

.showcase-section {
  display: grid;
  gap: var(--space-5);
  margin-block-start: var(--space-10);
}

.showcase-section h2 {
  margin-block-end: 0;
  font-family: var(--font-display);
  font-size: var(--type-heading);
}

.showcase-grid {
  display: grid;
  gap: var(--space-6);
}

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

.showcase-state > p {
  margin-block-end: 0;
  color: var(--color-muted);
  font-size: var(--type-small);
  font-weight: 700;
}

.showcase-cover {
  display: grid;
  place-items: center;
  min-block-size: 18rem;
  padding: var(--space-8);
  background: var(--color-sky);
  border: var(--border-pixel) solid var(--color-blue);
}

.showcase-cover .ebook-frame {
  inline-size: min(100%, 10rem);
}

.showcase-actions {
  display: grid;
  gap: var(--space-5);
}

@media (min-width: 45rem) {
  .sky-band,
  .sky-band__inner {
    min-block-size: 11rem;
  }

  .sky-band__inner {
    padding-inline: var(--space-10);
  }

  .pixel-cloud--one {
    inset-inline-start: var(--space-4);
    inline-size: 7rem;
  }

  .pixel-cloud--two {
    inset-inline-end: var(--space-4);
    inline-size: 6rem;
  }

  .ebook-layout {
    grid-template-columns: 15rem minmax(0, 1fr);
    align-items: center;
    gap: var(--space-10);
    padding-block: var(--space-10) var(--space-12);
  }

  .ebook-frame {
    inline-size: 100%;
  }

  .pixel-action {
    inline-size: auto;
  }

  .lead-form > .pixel-action,
  .pixel-action--link {
    inline-size: 100%;
  }

  .showcase-grid--two,
  .showcase-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .showcase-cover {
    min-block-size: 21rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .pixel-action:hover,
  .pixel-action:active,
  .pixel-action.is-hover-demo,
  .pixel-action.is-active-demo {
    transform: none;
  }

  .pixel-action:hover,
  .pixel-action:active,
  .pixel-action.is-hover-demo,
  .pixel-action.is-active-demo {
    outline: var(--border-pixel) solid var(--color-yellow);
    outline-offset: var(--space-1);
  }
}

.footer-links {
  margin-block-start: 0.25rem;
}

.footer-links a {
  color: inherit;
  font-size: var(--type-small);
  opacity: 0.85;
  text-underline-offset: 0.25em;
}