@import url("https://cdn.jsdelivr.net/npm/pretendard@1.3.9/dist/web/static/pretendard-dynamic-subset.min.css");

:root {
  --ink: #142536;
  --muted: #5d6b78;
  --line: #dce3e9;
  --paper: #f7f9fb;
  --white: #ffffff;
  --navy: #132a3a;
  --blue: #3156d3;
  --sky: #e9efff;
  --teal: #0d7a70;
  --mint: #ddf3ee;
  --yellow: #ffe39b;
  --yellow-soft: #fff8df;
  --coral: #d95d4f;
  --coral-soft: #fff0ed;
  --purple: #6854b8;
  --purple-soft: #f0edff;
  --shadow: 0 18px 50px rgba(19, 42, 58, 0.1);
  --radius: 24px;
  --content: 1120px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Pretendard, "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.72;
  word-break: keep-all;
}

button, input, textarea { font: inherit; }
a { color: inherit; }
code, pre { font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace; }

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  color: #fff;
  background: var(--navy);
  border-radius: 8px;
  transform: translateY(-150%);
}

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

.reading-progress {
  position: fixed;
  z-index: 120;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
}

.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--blue), #8b5cf6, var(--teal));
}

.topbar {
  position: sticky;
  z-index: 100;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 10px max(24px, calc((100vw - 1320px) / 2));
  border-bottom: 1px solid rgba(220, 227, 233, 0.85);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--navy);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.brand img { width: auto; height: 36px; object-fit: contain; }
.top-actions { display: flex; align-items: center; gap: 16px; }
.verified-date { color: var(--muted); font-size: 13px; font-weight: 650; }
.hub-back-link { color: var(--blue); font-size: 13px; font-weight: 800; text-decoration: none; }
.hub-back-link:hover { text-decoration: underline; }

.icon-button,
.text-button,
.copy-button,
.ghost-button,
.menu-toggle,
.primary-button,
.secondary-button {
  border: 0;
  cursor: pointer;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.icon-button {
  padding: 9px 14px;
  color: var(--navy);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  font-size: 14px;
  font-weight: 750;
}

.icon-button:hover,
.copy-button:hover,
.ghost-button:hover { transform: translateY(-1px); }

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 64px;
  align-items: center;
  max-width: 1320px;
  min-height: 650px;
  margin: 0 auto;
  padding: 78px 44px 86px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 24px;
  right: 0;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(89, 116, 242, 0.17), rgba(89, 116, 242, 0) 68%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(42px, 5.2vw, 68px);
  line-height: 1.14;
  letter-spacing: -0.045em;
}

.hero h1 em {
  color: var(--blue);
  font-style: normal;
  background: linear-gradient(transparent 72%, var(--yellow) 0);
}

.hero-lead {
  max-width: 720px;
  margin: 26px 0 0;
  color: #425466;
  font-size: 20px;
  line-height: 1.68;
}

.hero-actions,
.closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.primary-button,
.secondary-button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 20px;
  border-radius: 12px;
  font-weight: 800;
}

.primary-button { color: #fff; background: var(--blue); box-shadow: 0 10px 24px rgba(49, 86, 211, 0.24); }
.secondary-button { color: var(--navy); border: 1px solid #c7d1dc; background: #fff; }
.primary-button:hover, .secondary-button:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

.hero-note {
  max-width: 720px;
  margin: 22px 0 0;
  padding-left: 14px;
  color: var(--muted);
  border-left: 3px solid var(--yellow);
  font-size: 14px;
}

.hero-note strong { color: var(--ink); }

.hero-board {
  position: relative;
  padding: 28px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 34px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.08), transparent 40%),
    var(--navy);
  box-shadow: 0 28px 70px rgba(19, 42, 58, 0.24);
}

.hero-board::after {
  content: "";
  position: absolute;
  right: 24px;
  bottom: 24px;
  width: 70px;
  height: 70px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 50%;
}

.board-label { margin: 0 0 20px; color: #b8c6d2; font-size: 13px; font-weight: 750; letter-spacing: 0.08em; }
.flow-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }

.flow-list li {
  display: grid;
  grid-template-columns: 38px 80px 1fr;
  gap: 10px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.055);
}

.flow-list span { color: #8fa8ff; font-size: 12px; font-weight: 850; }
.flow-list b { font-size: 19px; }
.flow-list small { color: #c3ced7; font-size: 14px; }
.board-warning { position: relative; z-index: 2; margin: 20px 0 0; padding: 14px 16px; color: #f6e7a4; border-radius: 12px; background: rgba(255, 227, 155, 0.08); font-size: 14px; }

.mobile-tools { display: none; }

.layout {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 34px 80px;
}

.sidebar { position: relative; }
.sidebar-inner { position: sticky; top: 92px; max-height: calc(100vh - 112px); padding-right: 28px; overflow-y: auto; scrollbar-width: thin; }

.search-box { display: grid; gap: 8px; color: var(--muted); font-size: 13px; font-weight: 750; }
.search-box input { width: 100%; padding: 12px 13px; color: var(--ink); border: 1px solid var(--line); border-radius: 12px; outline: none; background: #fff; }
.search-box input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(49, 86, 211, 0.12); }
.search-status { min-height: 20px; margin: 6px 0 0; color: var(--blue); font-size: 12px; }

.course-progress { margin: 16px 0 22px; padding: 15px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.course-progress > div:first-child { display: flex; justify-content: space-between; gap: 10px; font-size: 13px; }
.course-progress strong { color: var(--blue); }
.progress-track { height: 7px; margin: 11px 0 7px; overflow: hidden; border-radius: 999px; background: #edf1f5; }
.progress-track span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--blue), var(--teal)); transition: width 240ms ease; }
.text-button { padding: 0; color: var(--muted); background: transparent; font-size: 12px; text-decoration: underline; }

.toc { display: grid; gap: 3px; }
.toc a { display: flex; gap: 10px; align-items: center; padding: 9px 10px; color: #526272; border-radius: 9px; font-size: 14px; font-weight: 650; text-decoration: none; }
.toc a span { color: #9aa7b3; font-size: 11px; }
.toc a:hover, .toc a.active { color: var(--blue); background: var(--sky); }
.toc a.active span { color: var(--blue); }

.sidebar-tip { margin-top: 22px; padding: 16px; color: #4e5e6e; border-radius: 16px; background: #eaf0f4; font-size: 13px; }
.sidebar-tip strong { color: var(--navy); }
.sidebar-tip p { margin: 6px 0 0; }

main { min-width: 0; border-left: 1px solid var(--line); }
.content-section { padding: 78px 0 78px 56px; border-bottom: 1px solid var(--line); }
.content-section.search-hidden { display: none; }
.section-heading { max-width: 820px; margin-bottom: 36px; }
.section-heading h2 { margin: 0; color: var(--navy); font-size: clamp(30px, 3.8vw, 44px); line-height: 1.24; letter-spacing: -0.035em; }
.section-heading > p:last-child { margin: 15px 0 0; color: var(--muted); font-size: 18px; }

.quick-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quick-card { position: relative; min-height: 215px; padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: 0 8px 30px rgba(19, 42, 58, 0.05); }
.step-number { display: inline-grid; place-items: center; width: 34px; height: 34px; color: #fff; border-radius: 10px; background: var(--blue); font-size: 12px; font-weight: 850; }
.quick-card h3 { margin: 18px 0 8px; color: var(--navy); font-size: 20px; }
.quick-card p { margin: 0; color: var(--muted); font-size: 15px; }
.quick-card code { padding: 2px 5px; color: var(--blue); border-radius: 5px; background: var(--sky); font-size: 13px; }

.prompt-card { position: relative; margin-top: 16px; padding: 20px; color: #eaf2f8; border-radius: 16px; background: #182d3c; }
.featured-prompt { margin-top: 26px; padding: 26px; }
.prompt-meta { display: flex; gap: 10px; align-items: center; margin-bottom: 12px; color: #b4c3ce; font-size: 12px; }
.prompt-card pre { margin: 0; padding-right: 96px; overflow-x: auto; white-space: pre-wrap; word-break: keep-all; }
.prompt-card code { font-size: 14px; line-height: 1.7; }
.copy-button { padding: 8px 12px; color: #fff; border: 1px solid rgba(255, 255, 255, 0.18); border-radius: 9px; background: rgba(255, 255, 255, 0.1); font-size: 12px; font-weight: 800; }
.prompt-card > .copy-button { position: absolute; top: 18px; right: 18px; }
.featured-prompt > .copy-button { top: 25px; right: 25px; }

.level { display: inline-flex; align-items: center; min-height: 24px; padding: 3px 9px; border-radius: 999px; font-size: 11px; font-weight: 850; }
.level.basic { color: #145b56; background: #d9f2ed; }
.level.intermediate { color: #614a08; background: #fff0b9; }
.level.advanced { color: #573e9b; background: #eee8ff; }

.check-strip { display: grid; grid-template-columns: 210px 1fr; gap: 22px; align-items: start; margin-top: 16px; padding: 20px 22px; border: 1px solid #eed996; border-radius: 16px; background: var(--yellow-soft); }
.check-strip strong { color: #624e14; }
.check-strip ul { margin: 0; padding-left: 22px; color: #665c43; }

.callout { display: flex; gap: 16px; align-items: flex-start; margin-top: 22px; padding: 20px 22px; border-radius: 16px; }
.key-callout { color: #275851; background: var(--mint); }
.caution-callout { color: #6b3c36; background: var(--coral-soft); }
.callout-icon { display: grid; flex: 0 0 auto; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: rgba(255, 255, 255, 0.74); font-weight: 900; }
.callout strong { color: var(--ink); }
.callout p { margin: 4px 0 0; }

.workspace-map { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.workspace-card { position: relative; min-height: 335px; padding: 24px; border-radius: 22px; overflow: hidden; }
.sources-card { border: 1px solid #d4dcfb; background: #f0f3ff; }
.chat-card { border: 1px solid #c7e4de; background: #eaf8f4; }
.studio-card { border: 1px solid #e0d7fb; background: #f5f1ff; }
.workspace-tag { color: var(--muted); font-size: 12px; font-weight: 850; letter-spacing: 0.09em; text-transform: uppercase; }
.workspace-card h3 { margin: 22px 0 10px; color: var(--navy); font-size: 23px; line-height: 1.35; }
.workspace-card p { margin: 0; color: #526170; font-size: 15px; }
.workspace-card ul { margin: 18px 0 0; padding-left: 20px; color: #566573; font-size: 14px; }
.workspace-card li + li { margin-top: 5px; }

.source-rules { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 18px; }
.source-rules article { padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.source-rules span { color: var(--blue); font-size: 12px; font-weight: 850; }
.source-rules h3 { margin: 6px 0 8px; font-size: 18px; }
.source-rules p { margin: 0; color: var(--muted); font-size: 14px; }

.learning-detail { margin-top: 20px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.learning-detail summary { padding: 18px 20px; color: var(--navy); cursor: pointer; font-weight: 800; }
.learning-detail > div { padding: 0 20px 18px; color: var(--muted); }
.learning-detail p { margin: 0; }

.builder-section { margin-left: 34px; padding-right: 34px; color: #fff; border: 0; border-radius: 28px; background: var(--navy); }
.light-heading h2 { color: #fff; }
.light-heading .section-kicker { color: #91aaff; }
.light-heading > p:last-child { color: #bdc8d1; }
.builder-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr); gap: 20px; }
.builder-form { display: grid; gap: 12px; }
.builder-form label { display: grid; gap: 7px; color: #c8d2da; font-size: 13px; font-weight: 700; }
.builder-form label b { color: #9db0ff; }
.builder-form textarea { width: 100%; resize: vertical; padding: 12px 13px; color: #fff; border: 1px solid #496071; border-radius: 11px; outline: none; background: #203a4d; font-size: 14px; line-height: 1.55; }
.builder-form textarea::placeholder { color: #8ca0af; }
.builder-form textarea:focus { border-color: #96a9ff; box-shadow: 0 0 0 3px rgba(135, 159, 255, 0.14); }
.builder-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.builder-actions .primary-button { background: #5b76ee; }
.ghost-button { min-height: 42px; color: #d3dde4; border: 1px solid #496071; background: transparent; font-size: 13px; }
.builder-output { display: flex; flex-direction: column; min-height: 100%; padding: 22px; color: var(--ink); border-radius: 18px; background: #fff; }
.output-heading { display: flex; justify-content: space-between; gap: 16px; align-items: center; font-weight: 850; }
.output-heading .copy-button { color: var(--blue); border-color: #cbd5f8; background: var(--sky); }
.builder-output pre { flex: 1; min-height: 220px; margin: 16px 0; padding: 18px; white-space: pre-wrap; color: #273b4b; border-radius: 12px; background: #f3f6f8; font-size: 13px; line-height: 1.7; }
.builder-checklist { display: grid; gap: 7px; padding-top: 14px; color: var(--muted); border-top: 1px solid var(--line); font-size: 12px; }
.builder-checklist strong { color: var(--ink); }
.builder-checklist label { display: flex; gap: 7px; align-items: flex-start; }

.question-ladder { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 28px; }
.question-ladder article { padding: 17px; color: #dbe4eb; border: 1px solid #3c5364; border-radius: 14px; background: rgba(255, 255, 255, 0.035); }
.question-ladder span { color: #93a9ff; font-size: 11px; font-weight: 850; }
.question-ladder h3 { margin: 4px 0 10px; color: #fff; font-size: 17px; }
.question-ladder code { font-size: 12px; line-height: 1.65; }

.practice-list { display: grid; gap: 20px; }
.practice-card { padding: 26px; border: 1px solid var(--line); border-radius: 22px; background: #fff; box-shadow: 0 10px 32px rgba(19, 42, 58, 0.05); transition: border-color 180ms ease, opacity 180ms ease; }
.practice-card.completed { border-color: #9dd2c8; }
.practice-card.completed .practice-no { color: #fff; background: var(--teal); }
.practice-top { display: flex; gap: 10px; align-items: center; }
.practice-no { display: inline-grid; place-items: center; width: 40px; height: 40px; color: var(--blue); border-radius: 12px; background: var(--sky); font-size: 13px; font-weight: 900; }
.done-check { margin-left: auto; color: var(--muted); font-size: 13px; font-weight: 750; }
.done-check input { margin-right: 5px; accent-color: var(--teal); }
.practice-card h3 { margin: 18px 0 6px; color: var(--navy); font-size: 25px; }
.practice-goal { margin: 0; color: var(--muted); }
.practice-steps { margin-top: 16px; padding: 16px 20px; color: #556675; border-radius: 13px; background: #f2f5f7; font-size: 14px; }
.practice-steps ol { margin: 0; padding-left: 20px; }
.practice-steps li + li { margin-top: 5px; }
.observe { margin: 16px 0 0; padding-left: 13px; color: #65551f; border-left: 3px solid var(--yellow); font-size: 14px; }
.share-checklist { display: grid; gap: 9px; margin-top: 16px; padding: 18px; border-radius: 13px; background: var(--mint); color: #315d58; font-size: 14px; }
.share-checklist input { margin-right: 7px; accent-color: var(--teal); }

.artifact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.artifact-grid article { display: flex; flex-direction: column; min-height: 250px; padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.artifact-icon { display: grid; place-items: center; width: 44px; height: 44px; color: var(--blue); border-radius: 13px; background: var(--sky); font-size: 21px; font-weight: 900; }
.artifact-grid h3 { margin: 18px 0 8px; font-size: 20px; }
.artifact-grid p { margin: 0; color: var(--muted); font-size: 15px; }
.artifact-grid small { display: block; margin-top: auto; padding-top: 18px; color: var(--teal); font-size: 12px; font-weight: 750; }

.comparison-table { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.comparison-row { display: grid; grid-template-columns: 150px 1fr 1fr; }
.comparison-row + .comparison-row { border-top: 1px solid var(--line); }
.comparison-row > * { padding: 17px 18px; }
.comparison-row > * + * { border-left: 1px solid var(--line); }
.comparison-head { color: #fff; background: var(--navy); font-size: 14px; font-weight: 850; }
.comparison-row b { color: var(--navy); background: #f5f7f9; font-size: 14px; }
.comparison-row span { color: #536371; font-size: 14px; }

.decision-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 18px; }
.decision-cards article { padding: 20px; border-radius: 16px; background: var(--sky); }
.decision-question { min-height: 54px; margin: 0 0 13px; color: #4e62a5; font-size: 14px; }
.decision-cards strong { display: block; color: var(--navy); }
.decision-cards span { display: block; margin-top: 6px; color: var(--muted); font-size: 13px; }

.diagnosis-list { display: grid; gap: 10px; }
.diagnosis-list article { overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.diagnosis-toggle { display: flex; width: 100%; align-items: center; justify-content: space-between; gap: 18px; padding: 18px 20px; color: var(--ink); border: 0; cursor: pointer; text-align: left; background: #fff; }
.diagnosis-toggle > span { display: flex; gap: 13px; align-items: center; }
.diagnosis-toggle b { display: grid; place-items: center; width: 27px; height: 27px; color: var(--blue); border-radius: 8px; background: var(--sky); }
.diagnosis-toggle strong { font-size: 17px; }
.diagnosis-toggle small { color: var(--muted); }
.diagnosis-body { display: none; padding: 0 20px 20px 60px; color: var(--muted); font-size: 14px; }
.diagnosis-list article.open .diagnosis-body { display: block; }
.diagnosis-body ol { margin-top: 0; padding-left: 20px; }

.safety-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.safe-card { padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.safe-card > span { color: var(--coral); font-size: 12px; font-weight: 850; }
.safe-card h3 { margin: 6px 0 14px; font-size: 20px; }
.safe-card ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 14px; }
.safe-card li + li { margin-top: 5px; }
.privacy-note { margin-top: 18px; padding: 24px; color: #304f69; border: 1px solid #c9ddeb; border-radius: 18px; background: #edf6fb; }
.privacy-note h3 { margin: 0 0 8px; color: var(--navy); }
.privacy-note p { margin: 0; }

.source-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.source-list a { display: grid; gap: 4px; padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: #fff; text-decoration: none; }
.source-list a:hover { border-color: #aebdf2; box-shadow: 0 10px 26px rgba(49, 86, 211, 0.08); }
.source-list span { color: var(--blue); font-size: 11px; font-weight: 850; }
.source-list strong { color: var(--navy); }
.source-list small { color: var(--muted); }
.source-caveat { margin: 18px 0 0; padding: 16px 18px; color: var(--muted); border-radius: 13px; background: #eaf0f4; font-size: 13px; }

.closing-section { border-bottom: 0; }
.closing-card { padding: 44px; color: #fff; border-radius: 28px; background: linear-gradient(135deg, var(--navy), #244c65); }
.closing-card .section-kicker { color: #9bb0ff; }
.closing-card h2 { margin: 0; font-size: clamp(30px, 4vw, 46px); line-height: 1.26; letter-spacing: -0.035em; }
.closing-card > p:not(.section-kicker) { max-width: 760px; margin: 18px 0 0; color: #c8d4dc; }
.closing-card .secondary-button { color: #fff; border-color: #60788a; background: transparent; }

footer { display: flex; justify-content: space-between; gap: 40px; max-width: 1252px; margin: 0 auto; padding: 38px 34px 54px; color: var(--muted); font-size: 12px; }
footer > div { display: flex; gap: 15px; align-items: center; max-width: 520px; }
footer img { width: auto; height: 30px; object-fit: contain; }
footer p { margin: 0; max-width: 520px; }
.footer-meta { display: grid; gap: 6px; max-width: 660px; }
.footer-back-link { color: var(--blue); font-weight: 800; }
.copyright { color: var(--ink); font-weight: 850; }
.rights-notice, .trademark-note { font-size: 11px; line-height: 1.62; }

.toast { position: fixed; z-index: 300; right: 24px; bottom: 24px; padding: 12px 16px; color: #fff; border-radius: 10px; background: var(--navy); box-shadow: var(--shadow); opacity: 0; pointer-events: none; transform: translateY(10px); transition: 180ms ease; }
.toast.show { opacity: 1; transform: translateY(0); }

:focus-visible { outline: 3px solid rgba(49, 86, 211, 0.38); outline-offset: 3px; }

@media (max-width: 1080px) {
  .hero { grid-template-columns: 1fr; gap: 34px; min-height: 0; padding-top: 60px; }
  .hero-board { max-width: 720px; }
  .layout { grid-template-columns: 230px minmax(0, 1fr); padding-inline: 24px; }
  .content-section { padding-left: 38px; }
  .builder-section { margin-left: 20px; padding-right: 28px; }
  .quick-grid, .workspace-map, .source-rules, .artifact-grid, .safety-grid { grid-template-columns: repeat(2, 1fr); }
  .question-ladder { grid-template-columns: repeat(2, 1fr); }
  .decision-cards { grid-template-columns: 1fr; }
}

@media (max-width: 800px) {
  body { font-size: 16px; }
  .topbar { min-height: 64px; padding-inline: 16px; }
  .brand span, .verified-date, .hub-back-link { display: none; }
  .hero { padding: 48px 20px 56px; }
  .hero h1 { font-size: clamp(38px, 10vw, 52px); }
  .hero-lead { font-size: 18px; }
  .flow-list li { grid-template-columns: 34px 72px 1fr; }
  .mobile-tools { position: sticky; z-index: 90; top: 64px; display: flex; align-items: center; justify-content: space-between; padding: 9px 16px; border-block: 1px solid var(--line); background: rgba(247, 249, 251, 0.96); backdrop-filter: blur(12px); }
  .menu-toggle { padding: 8px 11px; color: var(--navy); border: 1px solid var(--line); border-radius: 9px; background: #fff; font-size: 13px; font-weight: 800; }
  .mobile-progress { color: var(--muted); font-size: 12px; }
  .mobile-progress b { color: var(--blue); }
  .layout { display: block; padding: 0 16px 48px; }
  .sidebar { position: fixed; z-index: 95; top: 113px; left: 0; width: min(86vw, 330px); height: calc(100vh - 113px); padding: 18px; background: #fff; box-shadow: 18px 0 40px rgba(19, 42, 58, 0.18); transform: translateX(-110%); transition: transform 200ms ease; }
  .sidebar.open { transform: translateX(0); }
  .sidebar-inner { position: static; max-height: 100%; padding: 0; overflow-y: auto; }
  main { border-left: 0; }
  .content-section { padding: 58px 4px; }
  .builder-section { margin: 28px -4px; padding: 48px 20px; border-radius: 22px; }
  .builder-grid { grid-template-columns: 1fr; }
  .quick-grid, .workspace-map, .source-rules, .artifact-grid, .safety-grid, .source-list { grid-template-columns: 1fr; }
  .workspace-card { min-height: 0; }
  .check-strip { grid-template-columns: 1fr; gap: 8px; }
  .comparison-table { overflow-x: auto; }
  .comparison-row { min-width: 720px; }
  .diagnosis-toggle { align-items: flex-start; }
  .diagnosis-toggle small { display: none; }
  .diagnosis-body { padding-left: 20px; }
  footer { display: grid; padding-inline: 20px; }
}

@media (max-width: 520px) {
  .hero h1 br, .closing-card h2 br { display: none; }
  .hero-board { padding: 20px; border-radius: 24px; }
  .flow-list li { grid-template-columns: 30px 1fr; }
  .flow-list small { grid-column: 2; }
  .hero-actions, .closing-actions { display: grid; }
  .primary-button, .secondary-button { width: 100%; }
  .section-heading h2 { font-size: 31px; }
  .prompt-card { padding-top: 58px; }
  .prompt-card pre { padding-right: 0; }
  .featured-prompt > .copy-button, .prompt-card > .copy-button { top: 16px; right: 16px; }
  .question-ladder { grid-template-columns: 1fr; }
  .practice-card { padding: 20px; }
  .practice-card h3 { font-size: 22px; }
  .closing-card { padding: 30px 22px; }
  footer > div { align-items: flex-start; }
}

@media print {
  .topbar, .reading-progress, .mobile-tools, .sidebar, .hero-actions, .copy-button, .builder-actions, .toast, .closing-actions { display: none !important; }
  body { color: #000; background: #fff; font-size: 11pt; }
  .hero { display: block; min-height: 0; padding: 24px 0; }
  .hero-board { margin-top: 22px; color: #000; border: 1px solid #aaa; background: #fff; box-shadow: none; }
  .flow-list small, .board-label { color: #333; }
  .layout { display: block; max-width: none; padding: 0; }
  main { border: 0; }
  .content-section, .builder-section { margin: 0; padding: 28px 0; color: #000; border-bottom: 1px solid #aaa; background: #fff; break-inside: auto; }
  .light-heading h2, .closing-card h2 { color: #000; }
  .light-heading > p:last-child, .closing-card > p:not(.section-kicker) { color: #333; }
  .practice-card, .workspace-card, .artifact-grid article, .safe-card, .source-list a { break-inside: avoid; box-shadow: none; }
  .builder-grid { display: block; }
  .builder-form { display: none; }
  .builder-output { border: 1px solid #aaa; }
  .closing-card { color: #000; border: 1px solid #aaa; background: #fff; }
  footer { max-width: none; padding: 28px 0; }
}

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