/* Premium V5 workspace layer. Functional renderers remain untouched. */
:root {
  --ait-v5-rail: 208px;
  --ait-v5-top: 64px;
  --ait-v5-ink: #14211f;
  --ait-v5-copy: #34433f;
  --ait-v5-muted: #6b7774;
  --ait-v5-line: #dce4e1;
  --ait-v5-soft: #f4f8f7;
  --ait-v5-panel: #ffffff;
  --ait-v5-emerald: #087a69;
  --ait-v5-emerald-dark: #055e52;
  --ait-v5-focus: #0b69d1;
}

html, body, button, input, select, textarea { letter-spacing: 0 !important; }
.aiw-rail, .aiw-scrim, .aiw-menu-btn { display: none; }

body.aiw-internal {
  min-height: 100vh;
  background: #f7f9f8 !important;
  color: var(--ait-v5-ink) !important;
  background: #fff !important;
  background-image: none !important;
  text-shadow: none !important;
}

body.aiw-internal .aiw-rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 80;
  display: flex;
  width: var(--ait-v5-rail);
  flex-direction: column;
  box-sizing: border-box;
  background: #fff;
  border-right: 1px solid var(--ait-v5-line);
  padding: 0 12px 18px;
}

.aiw-brand {
  min-height: var(--ait-v5-top);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 10px;
  color: var(--ait-v5-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ait-v5-line);
}
.aiw-brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 7px;
  background: var(--ait-v5-emerald);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
}
.aiw-brand strong, .aiw-brand small { display: block; }
.aiw-brand strong { font-size: 15px; line-height: 1.2; }
.aiw-brand small { margin-top: 3px; color: var(--ait-v5-muted); font-size: 8px; font-weight: 700; }

.aiw-nav { display: grid; gap: 3px; padding: 20px 0; }
.aiw-nav a {
  display: flex;
  min-height: 42px;
  align-items: center;
  gap: 11px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 6px;
  color: #50605c;
  text-decoration: none;
  font-size: 13px;
  font-weight: 650;
}
.aiw-nav a:hover { background: #f5f8f7; color: var(--ait-v5-ink); }
.aiw-nav a.is-active {
  background: #eaf5f2;
  color: var(--ait-v5-emerald-dark);
  border-color: #d9ebe6;
}
.aiw-nav-icon { width: 18px; height: 18px; display: inline-grid; place-items: center; color: currentColor; }
.aiw-nav-icon .onae-ico { width: 18px; height: 18px; }

.aiw-rail-support {
  margin-top: auto;
  padding: 14px 12px;
  border: 1px solid var(--ait-v5-line);
  border-radius: 7px;
  background: #fbfcfc;
}
.aiw-rail-support strong { display: block; font-size: 12px; }
.aiw-rail-support p { margin: 7px 0 10px; color: var(--ait-v5-muted); font-size: 11px; line-height: 1.55; }
.aiw-rail-support a { color: var(--ait-v5-emerald-dark); font-size: 11px; font-weight: 750; text-decoration: none; }

body.aiw-internal .site-header,
body.aiw-internal .app-main,
body.aiw-internal .site-footer { margin-left: var(--ait-v5-rail) !important; }
body.aiw-internal .site-header {
  width: calc(100% - var(--ait-v5-rail)) !important;
  min-height: var(--ait-v5-top);
  background: #fff !important;
  border-bottom: 1px solid var(--ait-v5-line) !important;
}
body.aiw-internal .header-inner { max-width: none !important; min-height: var(--ait-v5-top); padding: 0 28px !important; }
body.aiw-internal .site-header .logo { display: none !important; }
body.aiw-internal .main-nav { gap: 8px !important; }
body.aiw-internal .main-nav a:nth-child(n+3) { display: none !important; }
body.aiw-internal .main-nav a {
  padding: 8px 9px !important;
  color: #40504c !important;
  font-size: 12px !important;
  border-radius: 5px !important;
}
body.aiw-internal .main-nav a:hover,
body.aiw-internal .main-nav a.active { color: var(--ait-v5-emerald-dark) !important; background: #eef6f4 !important; }

body.aiw-internal .app-main {
  width: auto !important;
  max-width: 1320px !important;
  padding: 32px 34px 72px !important;
}
body.aiw-internal .site-footer { width: auto !important; background: #fff !important; border-top: 1px solid var(--ait-v5-line) !important; }

body.aiw-internal .detail-hero {
  display: grid !important;
  grid-template-columns: 190px minmax(0, 1fr) !important;
  gap: 28px !important;
  align-items: center !important;
  margin: 0 0 26px !important;
  padding: 22px !important;
  background: #fff !important;
  border: 1px solid var(--ait-v5-line) !important;
  border-radius: 7px !important;
  box-shadow: none !important;
}
body.aiw-internal .detail-cover { width: 190px !important; }
body.aiw-internal .detail-cover .book-cover { border-radius: 5px !important; box-shadow: 0 8px 20px rgba(20,33,31,.10) !important; }
body.aiw-internal .detail-info h1 { margin: 10px 0 9px !important; color: var(--ait-v5-ink) !important; font-size: 28px !important; line-height: 1.28 !important; }
body.aiw-internal .detail-audience { color: var(--ait-v5-emerald-dark) !important; font-weight: 700 !important; }
body.aiw-internal .detail-summary { max-width: 820px; color: var(--ait-v5-copy) !important; line-height: 1.72 !important; }
body.aiw-internal .upgrade-badge-note { background: #edf6f3 !important; color: var(--ait-v5-emerald-dark) !important; border: 1px solid #d6e9e4 !important; border-radius: 5px !important; }
body.aiw-internal .book-art-banner { display: none !important; }

/* Page hierarchy */
body.aiw-internal .section-head,
body.aiw-internal .chapter-reader-head,
body.aiw-internal .quiz-header,
body.aiw-internal .resources-head {
  max-width: 920px !important;
  margin-bottom: 22px !important;
}
body.aiw-internal h1,
body.aiw-internal h2,
body.aiw-internal h3 { color: var(--ait-v5-ink) !important; letter-spacing: 0 !important; }
body.aiw-internal .section-head h2,
body.aiw-internal .chapter-reader-head h1,
body.aiw-internal .quiz-header h1,
body.aiw-internal .resources-head h1 {
  font-family: Pretendard, "Noto Sans KR", sans-serif !important;
  font-weight: 800 !important;
  line-height: 1.28 !important;
}
body.aiw-internal .section-head h2 { font-size: 26px !important; }
body.aiw-internal .chapter-reader-head h1,
body.aiw-internal .quiz-header h1,
body.aiw-internal .resources-head h1 { font-size: 30px !important; }
body.aiw-internal p, body.aiw-internal li { color: var(--ait-v5-copy); }

/* Tiles and content surfaces */
body.aiw-internal .card-grid,
body.aiw-internal .chapter-card-grid,
body.aiw-internal .activity-grid { gap: 14px !important; }
body.aiw-internal .book-card,
body.aiw-internal .chapter-card,
body.aiw-internal .activity-card,
body.aiw-internal .section-block,
body.aiw-internal .chapter-block,
body.aiw-internal .prompt-box,
body.aiw-internal .tip-box,
body.aiw-internal .mission-box,
body.aiw-internal .checklist-box,
body.aiw-internal .sources-box,
body.aiw-internal .quiz-question,
body.aiw-internal .resources-shell,
body.aiw-internal .premium-download-card,
body.aiw-internal .book-hero,
body.aiw-internal .trust-audience-card {
  background: #fff !important;
  border: 1px solid var(--ait-v5-line) !important;
  border-radius: 7px !important;
  box-shadow: none !important;
}
body.aiw-internal .book-card,
body.aiw-internal .chapter-card,
body.aiw-internal .activity-card { transition: border-color .16s ease, transform .16s ease, box-shadow .16s ease !important; }
body.aiw-internal .book-card:hover,
body.aiw-internal .chapter-card:hover,
body.aiw-internal .activity-card:hover {
  border-color: #85b9ad !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 10px 24px rgba(20,33,31,.07) !important;
}
body.aiw-internal .book-cover-wrap,
body.aiw-internal .book-art-banner,
body.aiw-internal .chapter-art-banner,
body.aiw-internal .chapter-reader-art { background: #edf5f3 !important; border-color: var(--ait-v5-line) !important; }
body.aiw-internal .book-cover,
body.aiw-internal .chapter-card-thumb,
body.aiw-internal .chapter-inline-figure img { object-fit: cover; }
body.aiw-internal .chapter-card-thumb { aspect-ratio: 16/9; width: 100%; }
body.aiw-internal .infographic-item {
  display: grid !important;
  grid-template-rows: auto minmax(56px, auto) !important;
  overflow: hidden !important;
  padding: 0 !important;
  background: #fff !important;
  text-align: left !important;
}
body.aiw-internal .infographic-item img {
  display: block !important;
  width: 100% !important;
  height: auto !important;
  aspect-ratio: 4 / 3 !important;
  padding: 10px !important;
  box-sizing: border-box !important;
  object-fit: contain !important;
  object-position: center !important;
  background: #f6f8f7 !important;
  border-bottom: 1px solid var(--ait-v5-line) !important;
}
body.aiw-internal .infographic-item .gallery-item-caption {
  display: flex !important;
  position: static !important;
  inset: auto !important;
  opacity: 1 !important;
  transform: none !important;
  visibility: visible !important;
  align-items: center !important;
  min-height: 56px !important;
  padding: 11px 13px !important;
  color: var(--ait-v5-ink) !important;
  background: #fff !important;
  background-image: none !important;
  text-shadow: none !important;
  font-size: 12px !important;
  font-weight: 700 !important;
  line-height: 1.5 !important;
  white-space: normal !important;
}

body.aiw-internal .tabs,
body.aiw-internal .resources-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--ait-v5-line);
}
body.aiw-internal .tab-btn,
body.aiw-internal .accordion-header,
body.aiw-internal .quiz-option-btn { border-radius: 5px !important; box-shadow: none !important; }
body.aiw-internal .tab-btn.active { background: #eaf5f2 !important; border-color: #9fc9bf !important; color: var(--ait-v5-emerald-dark) !important; }

body.aiw-internal .btn { border-radius: 5px !important; box-shadow: none !important; font-weight: 700 !important; }
body.aiw-internal .btn-primary,
body.aiw-internal .btn-solid { background: var(--ait-v5-emerald) !important; border-color: var(--ait-v5-emerald) !important; color: #fff !important; }
body.aiw-internal .btn-primary:hover,
body.aiw-internal .btn-solid:hover { background: var(--ait-v5-emerald-dark) !important; }
body.aiw-internal .btn-outline,
body.aiw-internal .btn-ghost { background: #fff !important; border-color: #aab8b4 !important; color: var(--ait-v5-ink) !important; }
body.aiw-internal .quiz-audience-card .book-card-body > div:first-child[aria-hidden="true"] { display: none !important; }

body.aiw-internal .chapter-compare {
  display: grid !important;
  grid-template-columns: 1fr 1fr !important;
  gap: 0 !important;
  overflow: hidden;
  border: 1px solid var(--ait-v5-line) !important;
  border-radius: 6px !important;
}
body.aiw-internal .chapter-col { padding: 18px !important; background: #fff !important; }
body.aiw-internal .chapter-col + .chapter-col { border-left: 1px solid var(--ait-v5-line) !important; background: #f4f8f7 !important; }
body.aiw-internal .col-label,
body.aiw-internal .chapter-no,
body.aiw-internal .badge { color: var(--ait-v5-emerald-dark) !important; }

/* Chapter catalogue: readable material tiles instead of promotional panels. */
html[data-ev-route="learn"] body.aiw-internal .chapter-card-grid {
  display: grid !important;
  grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
  align-items: stretch !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-card {
  display: grid !important;
  grid-template-rows: auto auto auto 1fr auto !important;
  min-width: 0 !important;
  overflow: hidden !important;
  padding: 0 !important;
  color: var(--ait-v5-ink) !important;
  text-decoration: none !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-card-head,
html[data-ev-route="learn"] body.aiw-internal .chapter-card h3,
html[data-ev-route="learn"] body.aiw-internal .chapter-card > p,
html[data-ev-route="learn"] body.aiw-internal .chapter-card-foot {
  margin-left: 16px !important;
  margin-right: 16px !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-card-head {
  order: 2;
  margin-top: 15px !important;
  margin-bottom: 8px !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-card-thumb {
  order: 1;
  display: block !important;
  width: 100% !important;
  height: auto !important;
  margin: 0 !important;
  aspect-ratio: 16 / 9 !important;
  object-fit: cover !important;
  object-position: center !important;
  border-radius: 0 !important;
  border-bottom: 1px solid var(--ait-v5-line) !important;
  background: #f1f5f4 !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-card h3 {
  order: 3;
  margin-top: 0 !important;
  margin-bottom: 8px !important;
  font-size: 17px !important;
  line-height: 1.45 !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-card > p {
  order: 4;
  margin-top: 0 !important;
  margin-bottom: 16px !important;
  color: var(--ait-v5-muted) !important;
  font-size: 13px !important;
  line-height: 1.65 !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-card-foot {
  order: 5;
  min-height: 24px;
  margin-bottom: 14px !important;
}

/* Reader: one calm workspace header, then full-width learning materials. */
html[data-ev-route="learn"] body.aiw-internal .reader-head {
  display: grid !important;
  grid-template-columns: auto minmax(160px, 1fr) auto !important;
  gap: 14px !important;
  align-items: center !important;
  margin-bottom: 14px !important;
}
html[data-ev-route="learn"] body.aiw-internal .reader-progress {
  height: 7px !important;
  overflow: hidden !important;
  border-radius: 4px !important;
  background: #dfe8e5 !important;
}
html[data-ev-route="learn"] body.aiw-internal .reader-progress-bar { background: var(--ait-v5-emerald) !important; }
html[data-ev-route="learn"] body.aiw-internal .content-trust-note {
  margin-bottom: 16px !important;
  padding: 12px 14px !important;
  border: 1px solid #d9e4e1 !important;
  border-left: 3px solid #c58b19 !important;
  border-radius: 6px !important;
  background: #fffdf7 !important;
  color: #4e4b40 !important;
  font-size: 12px !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-reader {
  display: grid !important;
  grid-template-columns: minmax(280px, 38%) minmax(0, 1fr) !important;
  gap: 0 28px !important;
  align-items: start !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .tts-bar,
html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .chapter-inline-figures-slot,
html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .section-list,
html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .mission-box,
html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .checklist-box,
html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .chapter-review-cta,
html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .content-correction-cta,
html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .chapter-nav {
  grid-column: 1 / -1 !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .tts-bar {
  margin-bottom: 16px !important;
  padding: 8px !important;
  border: 1px solid var(--ait-v5-line) !important;
  border-radius: 7px !important;
  background: #fff !important;
  box-shadow: none !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .chapter-art-banner {
  grid-column: 1 !important;
  margin: 0 0 24px !important;
  overflow: hidden !important;
  border: 1px solid var(--ait-v5-line) !important;
  border-radius: 7px !important;
  background: #f4f7f6 !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-art-banner img {
  width: 100% !important;
  height: auto !important;
  max-height: none !important;
  aspect-ratio: 4 / 3 !important;
  object-fit: contain !important;
  background: #fff !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .chapter-reader-head {
  grid-column: 2 !important;
  margin: 8px 0 24px !important;
  padding: 0 !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-intro { font-size: 15px !important; line-height: 1.75 !important; }
html[data-ev-route="learn"] body.aiw-internal .chapter-objectives {
  margin: 18px 0 !important;
  padding: 16px 18px 16px 36px !important;
  border: 1px solid var(--ait-v5-line) !important;
  border-radius: 7px !important;
  background: #f7faf9 !important;
}
html[data-ev-route="learn"] body.aiw-internal .chapter-inline-figures-slot { margin-top: 4px !important; }
html[data-ev-route="learn"] body.aiw-internal .section-list { max-width: 920px !important; }
html[data-ev-route="learn"] body.aiw-internal .section-block { padding: 22px !important; }

body.aiw-internal :focus-visible {
  outline: 3px solid rgba(11,105,209,.35) !important;
  outline-offset: 2px !important;
}

.aiw-menu-btn {
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  border: 1px solid var(--ait-v5-line);
  border-radius: 6px;
  background: #fff;
}
.aiw-menu-btn span { width: 17px; height: 1px; background: var(--ait-v5-ink); }
.aiw-scrim[hidden] { display: none !important; }

@media (max-width: 1040px) {
  body.aiw-internal .main-nav a:nth-child(n+5) { display: none !important; }
  html[data-ev-route="learn"] body.aiw-internal .chapter-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
}

@media (max-width: 760px) {
  :root { --ait-v5-top: 58px; }
  body.aiw-internal .site-header,
  body.aiw-internal .app-main,
  body.aiw-internal .site-footer { margin-left: 0 !important; }
  body.aiw-internal .site-header { width: 100% !important; }
  body.aiw-internal .header-inner { padding: 0 12px !important; }
  body.aiw-internal .aiw-menu-btn { display: flex; flex: 0 0 auto; }
  body.aiw-internal .nav-toggle { display: none !important; }
  body.aiw-internal .main-nav { display: none !important; }
  body.aiw-internal .header-actions { margin-left: auto; gap: 5px !important; }
  body.aiw-internal .header-actions > :not(.logpay-auth):not(#roleSwitcher):not(#roleBadge) { display: none !important; }
  body.aiw-internal .aiw-rail {
    transform: translateX(-102%);
    transition: transform .2s ease;
    box-shadow: 14px 0 36px rgba(20,33,31,.16);
  }
  body.aiw-internal.aiw-menu-open .aiw-rail { transform: translateX(0); }
  body.aiw-internal .aiw-scrim {
    position: fixed;
    inset: 0;
    z-index: 70;
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
    background: rgba(20,33,31,.38);
  }
  body.aiw-internal .app-main { padding: 22px 14px 54px !important; }
  body.aiw-internal .section-head h2,
  body.aiw-internal .chapter-reader-head h1,
  body.aiw-internal .quiz-header h1,
  body.aiw-internal .resources-head h1 { font-size: 23px !important; }
  body.aiw-internal .chapter-compare { grid-template-columns: 1fr !important; }
  body.aiw-internal .detail-hero { grid-template-columns: 1fr !important; gap: 18px !important; padding: 16px !important; }
  body.aiw-internal .detail-cover { width: 138px !important; margin: 0 auto !important; }
  body.aiw-internal .detail-info h1 { font-size: 22px !important; }
  body.aiw-internal .chapter-col + .chapter-col { border-left: 0 !important; border-top: 1px solid var(--ait-v5-line) !important; }
  body.aiw-internal .chapter-nav { display: grid !important; grid-template-columns: 1fr !important; }
  body.aiw-internal .chapter-inline-figures { grid-template-columns: 1fr !important; }
  html[data-ev-route="learn"] body.aiw-internal .chapter-card-grid { grid-template-columns: 1fr !important; }
  html[data-ev-route="learn"] body.aiw-internal .reader-head { grid-template-columns: 1fr auto !important; gap: 9px !important; }
  html[data-ev-route="learn"] body.aiw-internal .reader-head > .btn { grid-column: 1 / -1 !important; justify-self: start; max-width: 100%; white-space: normal !important; text-align: left; }
  html[data-ev-route="learn"] body.aiw-internal .chapter-reader { grid-template-columns: 1fr !important; }
  html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .chapter-art-banner,
  html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .chapter-reader-head { grid-column: 1 !important; }
  html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .chapter-reader-head { margin-top: 0 !important; }
  html[data-ev-route="learn"] body.aiw-internal .chapter-art-banner img { aspect-ratio: 16 / 10 !important; }
  html[data-ev-route="learn"] body.aiw-internal .chapter-reader > .tts-bar {
    display: grid !important;
    grid-template-columns: repeat(6, minmax(0, 1fr)) !important;
    overflow: visible !important;
  }
  html[data-ev-route="learn"] body.aiw-internal .tts-play-btn,
  html[data-ev-route="learn"] body.aiw-internal .tts-pause-btn,
  html[data-ev-route="learn"] body.aiw-internal .tts-stop-btn { grid-column: span 2; width: 100% !important; justify-content: center; }
  html[data-ev-route="learn"] body.aiw-internal .tts-voice-select { grid-column: span 4; width: 100% !important; max-width: none !important; }
  html[data-ev-route="learn"] body.aiw-internal .tts-speed-select { grid-column: span 2; width: 100% !important; max-width: none !important; }
  html[data-ev-route="learn"] body.aiw-internal .tts-bar-progress,
  html[data-ev-route="learn"] body.aiw-internal .tts-bar-engine-note { grid-column: 1 / -1; }
  html[data-ev-route="learn"] body.aiw-internal .section-block { padding: 17px !important; }
}

@media (prefers-reduced-motion: reduce) {
  .aiw-rail, body.aiw-internal * { transition-duration: .01ms !important; scroll-behavior: auto !important; }
}