:root {
  --ink: #17161b;
  --muted: #69636c;
  --paper: #fffdfa;
  --bg: #f7f0ef;
  --pink: #ed3d78;
  --pink-soft: #fff0f5;
  --green: #179a63;
  --green-soft: #eaf8f1;
  --purple: #7651c8;
  --purple-soft: #f2edff;
  --line: #eadfdd;
  --dark: #171b28;
  --shadow: 0 22px 70px rgba(63, 38, 42, 0.1);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Pretendard,
    "Noto Sans KR",
    "Noto Sans JP",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.72;
  letter-spacing: -0.012em;
}
button,
a {
  font: inherit;
}
.wrap {
  width: min(1040px, calc(100% - 32px));
  margin: auto;
}
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(
      circle at 9% 14%,
      rgba(237, 61, 120, 0.36),
      transparent 29%
    ),
    radial-gradient(
      circle at 90% 10%,
      rgba(54, 191, 126, 0.24),
      transparent 27%
    ),
    var(--dark);
  color: #fff;
  padding: 70px 0 64px;
}
.hero:after {
  content: "";
  position: absolute;
  inset: auto -10% -55% 35%;
  height: 520px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  transform: rotate(-12deg);
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 44px;
  align-items: center;
}
.eyebrow,
.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}
.eyebrow {
  padding: 7px 12px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.06);
}
h1 {
  font-size: clamp(39px, 6.4vw, 68px);
  line-height: 1.03;
  letter-spacing: -0.055em;
  margin: 22px 0 19px;
}
.accent {
  color: #ff6b9e;
}
.hero p {
  max-width: 680px;
  margin: 0;
  color: #eae7eb;
  font-size: 18px;
}
.hero-card {
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(12px);
}
.hero-card ol {
  margin: 14px 0 0;
  padding-left: 23px;
}
.hero-card li {
  padding: 5px 0;
}
.topbar {
  position: sticky;
  z-index: 30;
  top: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  width: min(1040px, calc(100% - 24px));
  margin: -24px auto 30px;
  padding: 10px 12px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 17px;
  background: rgba(255, 255, 255, 0.91);
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 32px rgba(40, 28, 30, 0.1);
}
.brand {
  font-weight: 900;
}
.toplinks {
  display: flex;
  align-items: center;
  gap: 7px;
}
.toplinks a {
  padding: 9px 12px;
  border-radius: 11px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}
.toplinks a.primary {
  background: var(--dark);
  color: #fff;
}
.main {
  padding: 8px 0 100px;
}
.section {
  margin: 25px 0;
  padding: clamp(25px, 5vw, 54px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--paper);
  box-shadow: var(--shadow);
}
.section-number {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--pink);
  color: #fff;
  font-size: 14px;
  font-weight: 900;
}
.section h2 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.04em;
  margin: 13px 0 12px;
}
.subhead {
  margin: 34px 0 12px;
  font-size: clamp(22px, 3vw, 29px);
  line-height: 1.25;
  letter-spacing: -0.035em;
}
.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: 17px;
}
.map {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-top: 28px;
}
.map-card {
  position: relative;
  padding: 18px 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}
.map-card b {
  display: block;
  font-size: 20px;
}
.map-card span {
  color: var(--muted);
  font-size: 13px;
}
.map-card:after {
  content: "→";
  position: absolute;
  right: -10px;
  top: 25px;
  z-index: 2;
  color: var(--pink);
  font-weight: 900;
}
.map-card:last-child:after {
  display: none;
}
.quick-jump {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 9px;
  margin-top: 18px;
}
.quick-jump a {
  padding: 11px 10px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--pink-soft);
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
  text-align: center;
  text-decoration: none;
}
.quick-jump a:hover,
.quick-jump a:focus-visible {
  border-color: var(--pink);
  color: var(--pink);
}
.decision {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 24px;
}
.choice-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
}
.choice-card h3 {
  margin: 0 0 6px;
  font-size: 21px;
}
.choice-card p {
  margin: 0;
  color: var(--muted);
}
.choice-card p b {
  color: var(--ink);
}
.choice-card strong {
  color: var(--green);
}
.choice-tip {
  display: block;
  margin-top: 11px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}
.availability {
  display: block;
  margin-top: 9px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}
.visual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 20px;
}
.explain-figure {
  overflow: hidden;
  margin: 22px 0 0;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
}
.visual-grid .explain-figure {
  margin: 0;
}
.explain-figure img {
  display: block;
  width: 100%;
  height: auto;
  background: #f2efec;
}
.explain-figure figcaption {
  padding: 13px 15px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}
.explain-figure figcaption a {
  color: #385fcb;
  font-weight: 800;
}
.mini-glossary dl,
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 22px 0 0;
}
.mini-glossary dl div,
.glossary-grid div {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: #fff;
}
.mini-glossary dt,
.glossary-grid dt {
  color: var(--pink);
  font-weight: 900;
}
.mini-glossary dd,
.glossary-grid dd {
  margin: 3px 0 0;
  color: var(--muted);
}
.compact-details {
  margin-top: 26px;
  padding: 17px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}
.compact-details summary {
  cursor: pointer;
  font-weight: 900;
}
.compact-details[open] summary {
  margin-bottom: 12px;
}
.quiz {
  margin-top: 26px;
  padding: 22px;
  border-radius: 22px;
  background: #f7f5f3;
}
.quiz-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.quiz button {
  width: 100%;
  padding: 14px;
  border: 1px solid #dcd3d0;
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
  font-weight: 800;
  cursor: pointer;
  text-align: left;
}
.quiz button:hover,
.quiz button:focus-visible {
  border-color: var(--pink);
  box-shadow: 0 0 0 3px rgba(237, 61, 120, 0.12);
}
.quiz-result {
  display: none;
  margin-top: 14px;
  padding: 16px;
  border-radius: 14px;
  background: var(--dark);
  color: #fff;
  font-weight: 800;
}
.quiz-result.show {
  display: block;
}
.term-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 26px;
}
.term {
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
}
.term.wide {
  grid-column: 1/-1;
}
.term-head {
  display: flex;
  align-items: center;
  gap: 10px;
}
.term-icon {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 13px;
  background: var(--pink-soft);
  font-size: 21px;
}
.term h3 {
  margin: 0;
  font-size: 24px;
}
.one-line {
  margin: 10px 0;
  font-weight: 900;
  color: var(--pink);
}
.term ul {
  margin: 8px 0 0;
  padding-left: 20px;
}
.use-when {
  margin: 12px 0 0;
  padding-top: 11px;
  border-top: 1px dashed var(--line);
  color: var(--muted);
  font-size: 14px;
}
.use-when b {
  color: var(--ink);
}
.note {
  margin-top: 13px;
  padding: 12px 14px;
  border-radius: 13px;
  background: #f6f3ef;
  color: #514b51;
  font-size: 14px;
}
.stack {
  margin-top: 26px;
  padding: 26px;
  border-radius: 24px;
  background: linear-gradient(145deg, var(--dark), #252c43);
  color: #fff;
}
.hub-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.hub-center,
.hub-item {
  padding: 15px;
  border: 1px solid rgba(255, 255, 255, 0.17);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.07);
}
.hub-center {
  grid-column: 1/-1;
  background: rgba(237, 61, 120, 0.18);
  text-align: center;
}
.hub-center b,
.hub-item b {
  display: block;
  color: #ff8cb4;
  font-size: 17px;
}
.hub-center span,
.hub-item span {
  color: #e6e8ee;
  font-size: 13px;
}
.stack-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.stack-chip {
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.19);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  font-weight: 800;
}
.stack-arrow {
  color: #72e4b7;
}
.analogy {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 9px;
  margin-top: 18px;
}
.analogy div {
  padding: 15px 10px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  text-align: center;
}
.analogy b {
  display: block;
  color: #ff76a5;
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 26px;
}
.scenario {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
}
.scenario .pill {
  padding: 5px 9px;
  background: var(--green-soft);
  color: #116a48;
}
.scenario h3 {
  margin: 12px 0 8px;
  font-size: 21px;
}
.recipe {
  margin-top: 15px;
  padding: 13px;
  border-radius: 13px;
  background: #f7f4f1;
  font-size: 14px;
  font-weight: 800;
}
.prompt-grid {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}
.prompt {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  background: var(--dark);
  color: #f8f5f1;
}
.prompt-title {
  padding: 15px 96px 9px 18px;
  color: #9be7c8;
  font-size: 14px;
  font-weight: 900;
}
.prompt pre {
  overflow: auto;
  margin: 0;
  padding: 4px 18px 20px;
  white-space: pre-wrap;
  color: #f8f5f1;
  font:
    13px/1.75 "SFMono-Regular",
    Consolas,
    monospace;
}
.prompt:not(.is-open) pre {
  display: none;
}
.prompt-toggle {
  width: 100%;
  padding: 11px 18px;
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
  background: rgba(255, 255, 255, 0.06);
  color: #cfd3df;
  font-size: 12px;
  font-weight: 900;
  cursor: pointer;
}
.prompt-toggle:hover,
.prompt-toggle:focus-visible {
  background: rgba(255, 255, 255, 0.13);
  color: #fff;
}
.copy {
  position: absolute;
  right: 11px;
  top: 11px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.11);
  color: #fff;
  padding: 8px 10px;
  font-size: 12px;
  font-weight: 900;
  cursor: pointer;
}
.copy:hover,
.copy:focus-visible {
  background: rgba(255, 255, 255, 0.2);
}
.checklist {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 22px;
  padding: 0;
  list-style: none;
}
.checklist li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: #fff;
}
.checklist li:before {
  content: "✓";
  display: grid;
  flex: 0 0 25px;
  height: 25px;
  place-items: center;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  font-weight: 900;
}
.warning {
  padding: 22px;
  border-radius: 20px;
  background: #fff4e8;
  border: 1px solid #f0d8bb;
}
.warning h3 {
  margin-top: 0;
}
.faq details {
  border-top: 1px solid var(--line);
  padding: 16px 0;
}
.faq summary {
  cursor: pointer;
  font-weight: 900;
}
.faq p {
  color: var(--muted);
}
.sources {
  font-size: 14px;
  color: var(--muted);
}
.sources a {
  color: #385fcb;
}
.closing {
  text-align: center;
  background: linear-gradient(145deg, #fff, #fff1f6);
}
.closing h2 {
  max-width: 680px;
  margin: 15px auto;
}
.closing .account {
  display: inline-block;
  margin-top: 18px;
  padding: 10px 15px;
  border-radius: 999px;
  background: var(--dark);
  color: #fff;
  font-weight: 900;
  text-decoration: none;
}
.closing .account:hover,
.closing .account:focus-visible {
  background: var(--pink);
}
.footer {
  padding: 20px 0 60px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
@media (max-width: 800px) {
  .hero {
    padding-top: 54px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-card {
    display: none;
  }
  .topbar {
    position: static;
    flex-wrap: wrap;
    margin: 12px auto 22px;
  }
  .toplinks {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .toplinks a {
    text-align: center;
  }
  .map {
    grid-template-columns: 1fr;
  }
  .map-card:after {
    content: "↓";
    right: 18px;
    top: auto;
    bottom: -15px;
  }
  .decision,
  .term-grid,
  .scenario-grid,
  .quiz-grid,
  .visual-grid,
  .mini-glossary dl,
  .glossary-grid {
    grid-template-columns: 1fr;
  }
  .quick-jump {
    grid-template-columns: 1fr 1fr;
  }
  .map-card {
    padding: 14px;
  }
  .choice-card,
  .term {
    padding: 17px;
  }
  .term-icon {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }
  .term h3 {
    font-size: 21px;
  }
  .term.wide {
    grid-column: auto;
  }
  .analogy {
    grid-template-columns: 1fr 1fr;
  }
  .checklist {
    grid-template-columns: 1fr;
  }
  .section {
    border-radius: 22px;
    padding: 24px 20px;
  }
  .hero p {
    font-size: 16px;
  }
}
@media print {
  .topbar,
  .quiz,
  .copy,
  .prompt-toggle {
    display: none !important;
  }
  .hero {
    padding: 30px 0;
  }
  .main {
    padding-bottom: 0;
  }
  .section {
    break-inside: avoid;
    box-shadow: none;
  }
  .prompt {
    break-inside: avoid;
  }
  .prompt pre {
    display: block !important;
  }
  .footer {
    padding-bottom: 0;
  }
}