@font-face {
  font-family: "Noto Sans KR";
  src: url("assets/NotoSansKR-user-guide.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

@font-face {
  font-family: "Noto Sans KR Print";
  src: url("assets/fonts/NotoSansKR-wght.ttf") format("truetype");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --pitch-deep: #123F2A;
  --pitch: #176B43;
  --pitch-light: #20734B;
  --pitch-line: #DCEFD7;
  --paper: #FFF8E8;
  --ink: #172019;
  --ink-inverse: #FFFDF4;
  --muted: #E6F2E8;
  --flower: #D94232;
  --flower-dark: #A82E24;
  --gold: #F3B61F;
  --sky: #83D8F5;
  --focus: #FFF06A;
  --error: #B3261E;
  --shadow-low: #20000000;
  --shadow-high: #38000000;
  --transparent: #00000000;

  --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;

  --radius-badge: 8px;
  --radius-button: 14px;
  --radius-panel: 16px;
  --page-width: 960px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-6);
}

body {
  min-width: 320px;
  min-height: 100svh;
  margin: 0;
  color: var(--ink-inverse);
  background:
    radial-gradient(
      circle at 50% 18%,
      var(--pitch-light) 0,
      var(--pitch) 36%,
      var(--pitch-deep) 100%
    );
  font-family: "Noto Sans KR", system-ui, sans-serif;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.5;
  overflow-wrap: break-word;
  word-break: keep-all;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  border: var(--space-1) solid
    color-mix(in srgb, var(--pitch-line) 24%, var(--transparent));
  background:
    linear-gradient(
      90deg,
      var(--transparent) calc(50% - 1px),
      color-mix(in srgb, var(--pitch-line) 18%, var(--transparent)) 50%,
      var(--transparent) calc(50% + 1px)
    ),
    radial-gradient(
      circle at 50% 50%,
      var(--transparent) 0 148px,
      color-mix(in srgb, var(--pitch-line) 18%, var(--transparent)) 149px 150px,
      var(--transparent) 151px
    );
  content: "";
  pointer-events: none;
}

a {
  color: inherit;
}

a:focus-visible,
summary:focus-visible {
  border-radius: var(--radius-badge);
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 20;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-button);
  color: var(--ink);
  background: var(--focus);
  font-weight: 800;
  transform: translateY(-160%);
}

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

.masthead,
.guide-shell,
.page-footer {
  width: min(calc(100% - var(--space-8)), var(--page-width));
  margin-inline: auto;
}

.masthead {
  padding-block: var(--space-10) var(--space-8);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: 0 0 var(--space-6);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.eyebrow::before {
  width: var(--space-8);
  height: var(--space-1);
  border-radius: var(--radius-badge);
  background: var(--gold);
  content: "";
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(240px, 2fr);
  gap: var(--space-10);
  align-items: center;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

h1 {
  max-width: 11ch;
  margin-bottom: var(--space-4);
  color: var(--ink-inverse);
  font-size: clamp(32px, 6vw, 44px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
}

h2 {
  margin-bottom: var(--space-4);
  color: var(--ink);
  font-size: 32px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

h3 {
  margin-bottom: var(--space-2);
  color: var(--ink);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.hero-copy {
  max-width: 40rem;
  margin-bottom: var(--space-6);
  color: var(--muted);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
}

.scope-note {
  display: inline-flex;
  min-height: var(--space-12);
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  border: 1px solid color-mix(in srgb, var(--pitch-line) 52%, var(--transparent));
  border-radius: var(--radius-button);
  color: var(--ink-inverse);
  background: color-mix(in srgb, var(--pitch-deep) 72%, var(--transparent));
  font-size: 14px;
  font-weight: 700;
}

.scope-note svg {
  flex: 0 0 auto;
  color: var(--gold);
}

.hero-board {
  position: relative;
  min-height: 280px;
  padding: var(--space-6);
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--pitch-line) 36%, var(--transparent));
  border-radius: var(--radius-panel);
  background:
    linear-gradient(
      135deg,
      color-mix(in srgb, var(--pitch-light) 88%, var(--pitch-line)),
      var(--pitch) 52%,
      var(--pitch-deep)
    );
  box-shadow:
    0 6px 16px var(--shadow-high),
    inset 0 1px 0 color-mix(in srgb, var(--pitch-line) 36%, var(--transparent));
}

.hero-board::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 144px;
  aspect-ratio: 1;
  border: 2px solid color-mix(in srgb, var(--pitch-line) 40%, var(--transparent));
  border-radius: 50%;
  content: "";
  transform: translate(-50%, -50%);
}

.hero-flower {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 72px;
  height: 72px;
  color: var(--flower);
  filter: drop-shadow(0 6px 8px var(--shadow-high));
}

.mini-mission {
  position: absolute;
  top: var(--space-6);
  left: var(--space-6);
  max-width: 144px;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-badge);
  color: var(--ink);
  background: var(--paper);
  box-shadow: 0 2px 6px var(--shadow-low);
  font-size: 12px;
  font-weight: 800;
}

.card-fan {
  position: absolute;
  right: var(--space-10);
  bottom: var(--space-5);
  left: var(--space-10);
  display: flex;
  justify-content: center;
  gap: 0;
}

.mini-card {
  display: block;
  width: var(--space-10);
  height: auto;
  object-fit: contain;
  box-shadow: 0 6px 16px var(--shadow-high);
  transform: rotate(var(--tilt));
  transform-origin: 50% 110%;
}

.guide-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 3fr);
  gap: var(--space-6);
  align-items: start;
  padding-bottom: var(--space-12);
}

.guide-nav,
.paper-panel {
  border: 1px solid color-mix(in srgb, var(--pitch-line) 82%, var(--paper));
  border-radius: var(--radius-panel);
  color: var(--ink);
  background: var(--paper);
  box-shadow:
    0 2px 6px var(--shadow-low),
    inset 0 1px 0 var(--ink-inverse);
}

.guide-nav {
  position: sticky;
  top: var(--space-4);
  padding: var(--space-4);
}

.nav-title {
  margin: 0 0 var(--space-2);
  color: var(--flower-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.guide-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.guide-nav a {
  display: flex;
  min-height: var(--space-12);
  align-items: center;
  gap: var(--space-2);
  border-bottom: 1px solid color-mix(in srgb, var(--pitch) 14%, var(--transparent));
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.guide-nav li:last-child a {
  border-bottom: 0;
}

.guide-nav a::before {
  width: var(--space-2);
  height: var(--space-2);
  flex: 0 0 auto;
  border: 2px solid var(--flower);
  border-radius: 50%;
  content: "";
}

.guide-nav a:hover {
  color: var(--flower-dark);
}

.guide-content {
  display: grid;
  gap: var(--space-6);
  min-width: 0;
}

.paper-panel {
  padding: var(--space-8);
}

.section-kicker {
  display: inline-block;
  margin-bottom: var(--space-2);
  color: var(--flower-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.section-intro {
  max-width: 42rem;
  margin-bottom: var(--space-6);
  color: color-mix(in srgb, var(--ink) 76%, var(--pitch));
}

.steps {
  margin: 0;
  padding: 0;
  counter-reset: guide-step;
  list-style: none;
}

.steps li {
  position: relative;
  min-height: 72px;
  padding: 0 0 var(--space-6) 64px;
  counter-increment: guide-step;
}

.steps li:last-child {
  min-height: 48px;
  padding-bottom: 0;
}

.steps li::before {
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  width: var(--space-12);
  height: var(--space-12);
  place-items: center;
  border-radius: 50%;
  color: var(--ink-inverse);
  background: var(--flower);
  box-shadow: 0 2px 6px var(--shadow-low);
  content: counter(guide-step, decimal-leading-zero);
  font-size: 14px;
  font-weight: 900;
}

.steps li:not(:last-child)::after {
  position: absolute;
  top: var(--space-12);
  bottom: 0;
  left: 23px;
  width: 2px;
  background: color-mix(in srgb, var(--flower) 36%, var(--paper));
  content: "";
}

.steps strong {
  display: block;
  margin-bottom: var(--space-1);
  font-size: 18px;
  font-weight: 800;
}

.steps p {
  margin-bottom: 0;
}

.screen-list {
  display: grid;
  gap: var(--space-3);
  margin: 0;
}

.screen-list > div {
  display: grid;
  grid-template-columns: minmax(112px, 1fr) 3fr;
  gap: var(--space-4);
  padding-block: var(--space-3);
  border-bottom: 1px solid color-mix(in srgb, var(--pitch) 16%, var(--transparent));
}

.screen-list > div:last-child {
  border-bottom: 0;
}

.screen-list dt {
  color: var(--flower-dark);
  font-weight: 800;
}

.screen-list dd {
  margin: 0;
}

.board-figure {
  margin: var(--space-6) 0 0;
}

.board-map {
  display: grid;
  grid-template-rows: auto auto minmax(176px, 1fr) auto auto;
  gap: var(--space-2);
  min-height: 480px;
  padding: var(--space-4);
  border-radius: var(--radius-panel);
  color: var(--ink-inverse);
  background:
    linear-gradient(180deg, var(--pitch-light), var(--pitch) 55%, var(--pitch-deep));
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--pitch-line) 40%, var(--transparent));
}

.board-zone {
  display: flex;
  min-height: var(--space-12);
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid color-mix(in srgb, var(--pitch-line) 34%, var(--transparent));
  border-radius: var(--radius-badge);
  background: color-mix(in srgb, var(--pitch-deep) 60%, var(--transparent));
}

.board-zone strong {
  flex: 0 0 auto;
  color: var(--gold);
}

.board-zone small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.table-zone {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: var(--space-1);
  padding: var(--space-4);
  border: 2px solid color-mix(in srgb, var(--pitch-line) 40%, var(--transparent));
  border-radius: var(--radius-panel);
}

.table-zone::after {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 96px;
  aspect-ratio: 1;
  border: 2px solid color-mix(in srgb, var(--pitch-line) 32%, var(--transparent));
  border-radius: 50%;
  content: "";
  transform: translate(-50%, -50%);
}

.month-slot {
  z-index: 1;
  display: grid;
  min-width: 0;
  place-items: center;
  border-radius: var(--radius-badge);
  color: var(--muted);
  background: color-mix(in srgb, var(--pitch-deep) 36%, var(--transparent));
  font-size: 12px;
  font-weight: 800;
}

figcaption {
  margin-top: var(--space-3);
  color: color-mix(in srgb, var(--ink) 70%, var(--pitch));
  font-size: 14px;
}

.decision-grid,
.rule-grid,
.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.info-block {
  padding: var(--space-4);
  border-radius: var(--radius-panel);
  background: color-mix(in srgb, var(--pitch-line) 34%, var(--paper));
}

.info-block h3 {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 18px;
  line-height: 1.45;
}

.info-block h3::before {
  width: var(--space-3);
  height: var(--space-3);
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--flower);
  content: "";
}

.info-block p {
  margin-bottom: 0;
  font-size: 14px;
}

.callout {
  margin-top: var(--space-5);
  padding: var(--space-4);
  border-left: var(--space-1) solid var(--gold);
  border-radius: 0 var(--radius-badge) var(--radius-badge) 0;
  background: color-mix(in srgb, var(--gold) 18%, var(--paper));
}

.callout > strong {
  display: block;
  margin-bottom: var(--space-1);
}

.callout p {
  margin-bottom: 0;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid color-mix(in srgb, var(--pitch) 18%, var(--transparent));
  border-radius: var(--radius-panel);
}

table {
  width: 100%;
  border-collapse: collapse;
  color: var(--ink);
  font-size: 14px;
  text-align: left;
}

caption {
  padding-bottom: var(--space-3);
  font-size: 14px;
  font-weight: 700;
  text-align: left;
}

th,
td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid color-mix(in srgb, var(--pitch) 16%, var(--transparent));
  vertical-align: top;
}

th {
  color: var(--ink-inverse);
  background: var(--pitch-deep);
  font-weight: 800;
  white-space: nowrap;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--pitch-line) 28%, var(--paper));
}

.score-chip {
  display: inline-block;
  min-width: var(--space-10);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-badge);
  color: var(--ink);
  background: var(--gold);
  font-size: 12px;
  font-weight: 900;
  text-align: center;
  white-space: nowrap;
}

.formula {
  margin: var(--space-5) 0 0;
  padding: var(--space-4);
  border-radius: var(--radius-badge);
  color: var(--ink-inverse);
  background: var(--pitch-deep);
  font-size: 14px;
  font-weight: 700;
}

.formula b {
  color: var(--gold);
}

.subsection-title {
  margin-top: var(--space-8);
}

.plain-list {
  margin: 0;
  padding-left: var(--space-5);
}

.plain-list li + li {
  margin-top: var(--space-2);
}

details {
  border-bottom: 1px solid color-mix(in srgb, var(--pitch) 16%, var(--transparent));
}

details:last-child {
  border-bottom: 0;
}

summary {
  display: flex;
  min-height: var(--space-12);
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-3);
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  color: var(--flower-dark);
  content: "+";
  font-size: 24px;
  line-height: 1;
}

details[open] summary::after {
  content: "−";
}

details p {
  padding: 0 var(--space-8) var(--space-4) 0;
}

.page-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-6) var(--space-10);
  border-top: 1px solid color-mix(in srgb, var(--pitch-line) 28%, var(--transparent));
  color: var(--muted);
  font-size: 14px;
}

.back-to-top {
  display: inline-flex;
  min-height: var(--space-12);
  align-items: center;
  padding-inline: var(--space-4);
  border: 1px solid color-mix(in srgb, var(--pitch-line) 52%, var(--transparent));
  border-radius: var(--radius-button);
  text-decoration: none;
  font-weight: 800;
}

.back-to-top:hover {
  color: var(--ink);
  background: var(--paper);
}

@media (max-width: 760px) {
  .masthead,
  .guide-shell,
  .page-footer {
    width: min(calc(100% - var(--space-6)), var(--page-width));
  }

  .masthead {
    padding-block: var(--space-8) var(--space-6);
  }

  .hero-grid,
  .guide-shell {
    grid-template-columns: 1fr;
  }

  .hero-board {
    min-height: 240px;
  }

  .guide-nav {
    position: static;
  }

  .guide-nav ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-1) var(--space-3);
  }

  .guide-nav a {
    border-bottom: 0;
  }

  .paper-panel {
    padding: var(--space-6);
  }
}

@media (max-width: 520px) {
  .masthead,
  .guide-shell,
  .page-footer {
    width: min(calc(100% - var(--space-4)), var(--page-width));
  }

  .eyebrow {
    margin-bottom: var(--space-4);
  }

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

  .hero-board {
    min-height: 216px;
    padding: var(--space-4);
  }

  .hero-flower {
    top: var(--space-4);
    right: var(--space-4);
    width: 56px;
    height: 56px;
  }

  .mini-mission {
    top: var(--space-4);
    left: var(--space-4);
  }

  .card-fan {
    right: var(--space-5);
    bottom: var(--space-4);
    left: var(--space-5);
  }

  .guide-nav ul,
  .decision-grid,
  .rule-grid,
  .settings-grid {
    grid-template-columns: 1fr;
  }

  .guide-nav a {
    min-height: var(--space-10);
  }

  .paper-panel {
    padding: var(--space-5);
  }

  h2 {
    font-size: 24px;
  }

  .screen-list > div {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }

  .steps li {
    padding-left: 60px;
  }

  .board-map {
    min-height: 420px;
    padding: var(--space-3);
  }

  .board-zone {
    align-items: flex-start;
    flex-direction: column;
    gap: var(--space-1);
  }

  .table-zone {
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(3, 1fr);
  }

  .page-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

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

@media print {
  :root {
    color-scheme: light;
  }

  body {
    color: var(--ink);
    background: var(--paper);
    font-family: "Noto Sans KR Print", sans-serif;
    font-size: 12px;
  }

  body::before,
  .skip-link,
  .guide-nav,
  .back-to-top {
    display: none;
  }

  .masthead,
  .guide-shell,
  .page-footer {
    width: 100%;
  }

  .masthead {
    padding: 0 0 var(--space-6);
  }

  .hero-grid,
  .guide-shell {
    display: block;
  }

  h1,
  .hero-copy,
  .eyebrow,
  .scope-note {
    color: var(--ink);
  }

  .hero-board {
    display: none;
  }

  .scope-note {
    background: var(--paper);
  }

  .scope-note svg,
  .board-zone strong {
    color: var(--ink);
  }

  .guide-content {
    display: block;
  }

  .paper-panel {
    margin-bottom: var(--space-6);
    padding: 0;
    border: 0;
    box-shadow: none;
    break-inside: auto;
  }

  .section-kicker {
    display: block;
    break-after: avoid;
  }

  h2,
  h3,
  .section-intro,
  caption {
    break-after: avoid;
  }

  .info-block,
  .callout,
  details,
  .steps li,
  tr {
    break-inside: avoid;
  }

  details > p {
    display: block !important;
  }

  summary::after {
    content: "" !important;
  }

  .board-map,
  .formula {
    color: var(--ink);
    background: var(--muted);
  }

  .formula b {
    color: var(--ink);
  }

  .board-zone {
    color: var(--ink);
    background: var(--paper);
  }

  .board-zone small,
  .month-slot {
    color: var(--ink);
  }

  .page-footer {
    color: var(--ink);
  }
}