:root {
  --cream: #fffaf3;
  --paper: #ffffff;
  --peach: #ffb79f;
  --peach-dark: #e8785f;
  --mint: #bfe6d4;
  --mint-dark: #397964;
  --yellow: #ffe7a6;
  --lavender: #d9d0f4;
  --ink: #3d3734;
  --muted: #726965;
  --line: #eadfd7;
  --code: #292524;
  --shadow: 0 18px 48px rgba(96, 71, 57, 0.1);
  --radius-lg: 28px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 8% 8%, rgba(255, 183, 159, 0.3), transparent 24rem),
    radial-gradient(circle at 92% 24%, rgba(191, 230, 212, 0.42), transparent 28rem),
    var(--cream);
  color: var(--ink);
  font-family: Pretendard, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  line-height: 1.7;
  word-break: keep-all;
}

a {
  color: inherit;
}

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

.hero {
  min-height: 42vh;
  display: grid;
  place-items: center;
  padding: 64px 24px 40px;
  text-align: center;
}

.hero-inner {
  width: min(860px, 100%);
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.3;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(40px, 7vw, 72px);
  letter-spacing: -0.055em;
}

h1 span {
  color: var(--peach-dark);
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border: 0;
  border-radius: 15px;
  text-decoration: none;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--peach-dark);
  color: white;
  box-shadow: 0 12px 26px rgba(232, 120, 95, 0.27);
}

.download-step {
  margin-bottom: 12px;
}

.download-step .button {
  min-height: 44px;
  padding: 9px 16px;
  font-size: 14px;
}

.guide-layout {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto 100px;
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.guide-nav {
  position: sticky;
  top: 22px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.guide-nav strong {
  display: block;
  margin: 0 8px 10px;
  font-size: 14px;
}

.guide-nav a {
  display: block;
  padding: 8px;
  border-radius: 9px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.guide-nav a:hover {
  background: var(--cream);
  color: var(--ink);
}

.guide-content {
  min-width: 0;
}

.step-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}

.step-card {
  scroll-margin-top: 24px;
  margin-bottom: 24px;
  padding: clamp(24px, 5vw, 44px);
}

.step-heading {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 28px;
}

.step-number {
  flex: 0 0 auto;
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 14px;
  background: var(--peach);
  font-size: 18px;
  font-weight: 900;
}

.step-heading h2 {
  margin-bottom: 5px;
  font-size: clamp(24px, 4vw, 32px);
  letter-spacing: -0.025em;
}

.step-heading p,
.muted {
  margin: 0;
  color: var(--muted);
}

.subsection {
  padding-top: 22px;
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.subsection:first-of-type {
  padding-top: 0;
  margin-top: 0;
  border-top: 0;
}

.subsection h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.setting-step {
  margin: 26px 0 10px;
  font-size: 17px;
}

.subsection h3 + .setting-step {
  margin-top: 16px;
}

ol,
ul {
  padding-left: 24px;
}

li + li {
  margin-top: 8px;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.link-card {
  display: flex;
  min-height: 88px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--cream);
  text-decoration: none;
}

.link-card:hover {
  border-color: var(--peach);
}

.link-card strong,
.link-card small {
  display: block;
}

.link-card small {
  color: var(--muted);
}

.callout {
  margin: 18px 0;
  padding: 16px 18px;
  border-radius: 14px;
  background: #fff2d0;
}

.callout.mint {
  background: #e6f6ef;
}

.callout strong {
  display: block;
  margin-bottom: 3px;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  background: #f1ebe7;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.9em;
}

.code-block {
  position: relative;
  overflow: hidden;
  margin: 14px 0;
  border-radius: 15px;
  background: var(--code);
  color: #f8f4f1;
}

.code-block pre {
  overflow-x: auto;
  margin: 0;
  padding: 22px;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
  line-height: 1.65;
  white-space: pre;
}

.copy-button {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  color: white;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.file-tree {
  margin: 0;
  padding: 20px;
  border-radius: 15px;
  background: #edf8f3;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 14px;
  line-height: 1.8;
  white-space: pre;
  overflow-x: auto;
}

footer {
  padding: 32px 20px 50px;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

@media (max-width: 900px) {
  .guide-layout {
    grid-template-columns: 1fr;
  }

  .guide-nav {
    position: static;
    display: flex;
    gap: 6px;
    overflow-x: auto;
  }

  .guide-nav strong {
    display: none;
  }

  .guide-nav a {
    flex: 0 0 auto;
    background: var(--cream);
  }
}

@media (max-width: 640px) {
  .hero {
    min-height: auto;
    padding: 48px 20px 34px;
  }

  .guide-layout {
    width: min(100% - 24px, 1180px);
  }

  .link-grid {
    grid-template-columns: 1fr;
  }

  .step-card {
    border-radius: 20px;
  }

  .step-heading {
    display: block;
  }

  .step-number {
    margin-bottom: 14px;
  }

  .button {
    width: 100%;
  }
}