:root {
  --font-serif: Georgia, 'Times New Roman', Times, serif;
  --font-sans:  'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono:  'Courier New', Courier, monospace;

  --bg:        #07090f;
  --bg1:       #0e1320;
  --bg2:       #141c2e;
  --bg3:       #1b2540;
  --paper:     #141c2e;
  --soft:      #0e1320;
  --line:      rgba(255,255,255,.07);
  --line2:     rgba(255,255,255,.13);
  --line3:     rgba(255,255,255,.22);

  --text:      #dce5f5;
  --ink:       #dce5f5;
  --dim:       #7a90b8;
  --muted:     #7a90b8;
  --dim2:      #4a5878;

  --blue:      #1a56db;
  --blue-lt:   #4f86f7;
  --teal:      #0d9488;
  --teal-lt:   #2dd4bf;
  --gold:      #c47f17;
  --gold-lt:   #fbbf24;
  --violet:    #6d28d9;
  --violet-lt: #b197fc;
  --rose-lt:   #fb7185;
  --green-lt:  #34d399;

  --rail-w:    240px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--blue-lt); text-decoration: none; }
a:hover { color: var(--gold-lt); }
::selection { background: rgba(251,191,36,.28); color: #fff; }

.topbar {
  position: sticky; top: 0; z-index: 500;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  background: rgba(7,9,15,.95);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}
.topbar nav { display: flex; gap: 18px; flex-wrap: wrap; }
.topbar nav a {
  font-family: var(--font-sans);
  font-size: .78rem; font-weight: 600;
  letter-spacing: .04em;
  color: var(--dim);
  text-transform: uppercase;
}
.topbar nav a:hover { color: var(--gold-lt); }

.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; }
.brand-mark {
  display: grid; place-items: center;
  width: 30px; height: 30px;
  border: 1px solid var(--line2);
  background: rgba(251,191,36,.1);
  color: var(--gold-lt);
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 800;
  border-radius: 6px;
}
.brand strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.04rem; font-weight: 700;
  color: #fff;
  letter-spacing: -.02em;
}
.brand em {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: .6rem; font-weight: 700; font-style: normal;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--dim);
}

#academyRail {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--rail-w);
  background: rgba(7,9,15,.96);
  border-right: 1px solid var(--line);
  z-index: 600;
  overflow-y: auto;
  padding: 18px 14px 80px;
  font-family: var(--font-sans);
}
#academyRail .rail-hdr { display: flex; align-items: center; justify-content: space-between; margin: 4px 6px 14px; }
#academyRail .rail-brand { font-family: var(--font-serif); font-size: 1.04rem; font-weight: 700; color: #fff; letter-spacing: -.02em; }
#academyRail .rail-brand-accent { color: var(--gold-lt); }
#academyRail .rail-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: .6rem; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--dim);
  padding: 6px 10px 4px;
}
#academyRail .rail-group { padding: 8px 0 4px; border-top: 1px solid var(--line); margin-top: 10px; }
#academyRail .rail-group:first-of-type { border-top: 0; margin-top: 0; padding-top: 4px; }
#academyRail .rail-link {
  display: flex; align-items: center; gap: 6px;
  color: var(--text);
  font-size: .84rem; font-weight: 500;
  padding: 7px 10px; border-radius: 7px;
  text-decoration: none;
  transition: background .15s ease, color .15s ease;
}
#academyRail .rail-link:hover { background: rgba(255,255,255,.05); color: var(--gold-lt); }
#academyRail .rail-link.is-active {
  background: rgba(26,86,219,.18);
  color: #fff;
  font-weight: 700;
  border-left: 3px solid var(--blue-lt);
  padding-left: 7px;
}
#academyRail .rail-close { display: none; background: transparent; border: 0; color: var(--dim); font-size: 1.5rem; cursor: pointer; line-height: 1; }
#railOverlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 590; }

@media (min-width: 961px) {
  body.vs-academy .topbar,
  body.vs-academy main,
  body.vs-academy footer { margin-left: var(--rail-w); }
}
@media (max-width: 960px) {
  #academyRail { transform: translateX(-100%); transition: transform .25s ease; }
  body.rail-open #academyRail { transform: translateX(0); }
  body.rail-open #railOverlay { display: block; }
  #academyRail .rail-close { display: inline-flex; }
}
body.rail-open { overflow: hidden; }

main { padding: 24px 28px 80px; }
main > section, main > article { max-width: 1120px; margin: 28px auto; }
main > section:first-of-type, main > article:first-of-type { margin-top: 24px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: .62rem; font-weight: 700;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--gold-lt);
  background: rgba(196,127,23,.1);
  border: 1px solid rgba(251,191,36,.28);
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 14px;
}
.lead { font-size: 1rem; color: var(--text); line-height: 1.7; max-width: 760px; }
h1, h2, h3, h4, h5 { font-family: var(--font-serif); color: #fff; line-height: 1.18; letter-spacing: -.02em; margin: 0 0 .5em; }
h1 { font-size: 2.2rem; font-weight: 700; }
h2 { font-size: 1.5rem; font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 700; }
h4 { font-size: 1rem; font-weight: 700; }
h1 em, h2 em, h3 em { font-style: italic; color: var(--gold-lt); }
p { margin: 0 0 .8em; }
strong { color: #fff; }

.academy-hero, .course-hero {
  display: grid;
  grid-template-columns: minmax(0,1fr) minmax(280px, 380px);
  gap: 32px;
  padding: 28px 32px;
  background: linear-gradient(135deg, rgba(26,86,219,.10) 0%, rgba(13,148,136,.06) 50%, rgba(196,127,23,.06) 100%);
  border: 1px solid var(--line);
  border-radius: 18px;
}
@media (max-width:760px){ .academy-hero, .course-hero { grid-template-columns: 1fr; padding: 24px; } }
.academy-hero h1, .course-hero h1 { margin-bottom: 12px; }

.academy-panel, .course-summary {
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-radius: 14px;
  padding: 18px 20px;
}
.academy-panel { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.metric strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.7rem; font-weight: 700;
  color: var(--gold-lt);
  letter-spacing: -.02em;
}
.metric span {
  display: block; margin-top: 2px;
  font-family: var(--font-mono);
  font-size: .62rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--dim);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) 2fr;
  gap: 28px;
  align-items: start;
}
@media (max-width:760px){ .section-grid { grid-template-columns: 1fr; } }
.section-grid h2 { margin: 6px 0 8px; }
.section-head h2 { margin: 6px 0 8px; }

.timeline { display: flex; flex-direction: column; gap: 14px; }
.timeline article {
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-left: 3px solid var(--blue-lt);
  border-radius: 12px;
  padding: 16px 18px;
}
.timeline article span {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .62rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--blue-lt);
  margin-bottom: 6px;
}
.timeline article h3 { color: #fff; margin: 0 0 6px; }

ol.module-list { counter-reset: m; list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
ol.module-list li {
  counter-increment: m;
  position: relative;
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-left: 3px solid var(--teal-lt);
  border-radius: 10px;
  padding: 12px 14px 12px 50px;
  color: var(--text);
  line-height: 1.55;
}
ol.module-list li::before {
  content: counter(m, decimal-leading-zero);
  position: absolute; left: 14px; top: 12px;
  font-family: var(--font-mono);
  font-size: .8rem; font-weight: 700;
  color: var(--teal-lt);
  letter-spacing: .04em;
}
ul { padding-left: 1.2rem; }
ul li { margin: .35em 0; }

.table-wrap {
  overflow-x: auto;
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-radius: 14px;
}
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th {
  font-family: var(--font-mono);
  font-size: .62rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--dim);
  background: rgba(255,255,255,.025);
}
tr:last-child td { border-bottom: 0; }

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}
.course-card {
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-left: 3px solid var(--gold-lt);
  border-radius: 14px;
  padding: 18px 20px;
  display: flex; flex-direction: column;
  transition: background .2s ease, border-color .2s ease, transform .15s ease;
}
.course-card:hover { background: rgba(20,28,46,.85); border-color: var(--line3); transform: translateY(-2px); }
.course-card h3 { color: #fff; margin: 6px 0 8px; }
.course-card a {
  align-self: flex-start;
  margin-top: 12px;
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--blue);
  color: #fff;
  font-family: var(--font-sans);
  font-size: .78rem; font-weight: 700;
  padding: 8px 14px;
  border-radius: 7px;
  text-decoration: none;
  transition: background .2s ease;
}
.course-card a:hover { background: var(--blue-lt); color: #fff; }

.reference-link-band {
  background: linear-gradient(135deg, rgba(109,40,217,.12) 0%, rgba(26,86,219,.10) 100%);
  border: 1px solid rgba(177,151,252,.28);
  border-radius: 14px;
  padding: 22px 24px;
  display: grid;
  grid-template-columns: minmax(0,1fr) auto;
  gap: 22px; align-items: center;
}
@media (max-width:760px){ .reference-link-band { grid-template-columns: 1fr; } }
.reference-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.reference-button {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--line2);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: .82rem; font-weight: 600;
  padding: 9px 16px;
  border-radius: 8px;
  text-decoration: none;
  transition: background .15s ease, border-color .15s ease, transform .12s ease;
}
.reference-button:hover { background: rgba(255,255,255,.1); border-color: var(--gold-lt); color: var(--gold-lt); transform: translateY(-1px); }

.course-learning-shell { display: grid; grid-template-columns: 240px 1fr; gap: 22px; }
@media (max-width:860px){ .course-learning-shell { grid-template-columns: 1fr; } }
.module-side-menu {
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-radius: 12px;
  padding: 16px 14px;
  position: sticky; top: 80px;
  align-self: start;
}
.module-side-menu strong {
  display: block;
  font-family: var(--font-mono);
  font-size: .62rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--dim);
  margin-bottom: 8px;
}
.module-side-menu a {
  display: block;
  color: var(--text);
  padding: 6px 8px;
  border-radius: 6px;
  font-size: .82rem;
  text-decoration: none;
  transition: background .15s ease, color .15s ease;
}
.module-side-menu a:hover { background: rgba(255,255,255,.05); color: var(--gold-lt); }

.module-content-list { display: flex; flex-direction: column; gap: 16px; }
.module-content-block {
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-radius: 14px;
  padding: 20px 22px;
}
.module-content-heading h3 { margin: 6px 0 8px; color: #fff; }
.module-pages { display: grid; gap: 10px; margin-top: 12px; }
.module-page {
  background: rgba(255,255,255,.025);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal-lt);
  border-radius: 10px;
  padding: 12px 14px;
}
.module-page-body { font-size: .92rem; color: var(--text); line-height: 1.6; }

.lesson-deck, .lesson-slides { display: flex; flex-direction: column; gap: 10px; }
.lesson-deck-head {
  background: rgba(255,255,255,.025);
  border: 1px solid var(--line2);
  border-radius: 10px;
  padding: 14px 16px;
}
.lesson-slide {
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-left: 3px solid var(--gold-lt);
  border-radius: 10px;
  padding: 14px 16px;
}
.lesson-slide-body { color: var(--text); }
.lesson-slide details summary {
  cursor: pointer;
  font-family: var(--font-serif);
  color: #fff;
  font-size: 1rem;
  margin-bottom: 8px;
}

.flashcard-layout { display: grid; grid-template-columns: 240px 1fr; gap: 22px; }
@media (max-width:860px){ .flashcard-layout { grid-template-columns: 1fr; } }
.flashcard-list { display: grid; gap: 8px; }
.flashcard-list-item {
  background: rgba(255,255,255,.025);
  border: 1px solid var(--line2);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: .85rem;
  color: var(--text);
  cursor: pointer;
  transition: background .15s ease;
}
.flashcard-list-item:hover { background: rgba(255,255,255,.05); color: var(--gold-lt); }
.flashcard-list-item.is-active { background: rgba(26,86,219,.18); color: #fff; border-color: rgba(79,134,247,.32); }
.flashcard-card {
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-radius: 14px;
  padding: 28px 30px;
  min-height: 220px;
  display: flex; flex-direction: column; gap: 14px;
  color: var(--text);
}
.flashcard-kicker { font-family: var(--font-mono); font-size: .62rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--gold-lt); }
.flashcard-hint { font-size: .82rem; color: var(--dim); font-style: italic; }
.flashcard-controls { display: flex; gap: 8px; flex-wrap: wrap; }
.flashcard-controls button {
  background: var(--blue);
  color: #fff;
  border: 0;
  font-family: var(--font-sans);
  font-size: .82rem; font-weight: 700;
  padding: 9px 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: background .15s ease, transform .12s ease;
}
.flashcard-controls button:hover { background: var(--blue-lt); transform: translateY(-1px); }
.flashcard-controls button.ghost { background: rgba(255,255,255,.06); color: var(--text); border: 1px solid var(--line2); }
.flashcard-controls button.ghost:hover { background: rgba(255,255,255,.1); border-color: var(--line3); }

.concept-library { display: flex; flex-direction: column; gap: 10px; }
.concept-entry {
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-radius: 10px;
  padding: 14px 16px;
}
.concept-entry-body { color: var(--text); font-size: .92rem; line-height: 1.6; }

.rubric, .plain-panel, .architecture-map, .learning-loop, .learning-principles {
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-radius: 14px;
  padding: 22px 24px;
}

.detail-button {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--blue);
  color: #fff;
  font-family: var(--font-sans);
  font-size: .82rem; font-weight: 700;
  padding: 9px 16px;
  border-radius: 8px;
  text-decoration: none;
  border: 0;
  cursor: pointer;
}
.detail-button:hover { background: var(--blue-lt); }

.academy-tutor {
  margin: 36px 0;
  padding: 28px;
  background: linear-gradient(180deg, rgba(26,86,219,.06) 0%, rgba(20,28,46,.65) 100%);
  border: 1px solid var(--line2);
  border-radius: 16px;
  box-shadow: 0 14px 30px rgba(0,0,0,.25);
}
.academy-tutor-head { margin-bottom: 18px; }
.academy-tutor-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .66rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--gold-lt);
  background: rgba(251,191,36,.12);
  border: 1px solid rgba(251,191,36,.32);
  padding: 5px 12px; border-radius: 100px;
  margin-bottom: 12px;
}
.academy-tutor-title {
  font-family: var(--font-serif);
  font-size: 1.45rem; font-weight: 700;
  color: #fff; margin: 0 0 8px; line-height: 1.2;
}
.academy-tutor-title em { font-style: italic; color: var(--gold-lt); }
.academy-tutor-sub {
  color: var(--dim);
  font-size: .94rem; line-height: 1.6;
  margin: 0;
}
.academy-tutor-row { margin: 14px 0; }
.academy-tutor-field {
  display: block;
  font-family: var(--font-mono);
  font-size: .62rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--dim);
}
.academy-tutor-field > span { display: block; margin-bottom: 6px; }
.academy-tutor-topic,
.academy-tutor-q {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: .92rem;
  text-transform: none; letter-spacing: 0;
  border: 1px solid var(--line2);
  border-radius: 10px;
  padding: 11px 13px;
  transition: border-color .15s ease, background .15s ease;
}
.academy-tutor-topic:focus,
.academy-tutor-q:focus {
  outline: none;
  border-color: rgba(79,134,247,.55);
  background: rgba(0,0,0,.35);
}
.academy-tutor-q { resize: vertical; min-height: 80px; line-height: 1.55; }
.academy-tutor-actions {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin: 6px 0 0;
}
.academy-tutor-btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-sans);
  font-size: .86rem; font-weight: 700; letter-spacing: .01em;
  padding: 10px 18px; border-radius: 9px;
  border: none; cursor: pointer;
  background: var(--blue); color: #fff;
  transition: background .2s ease, transform .15s ease, border-color .2s ease;
}
.academy-tutor-btn:hover { background: var(--blue-lt); transform: translateY(-1px); }
.academy-tutor-btn:disabled { opacity: .55; cursor: wait; transform: none; }
.academy-tutor-btn-ghost {
  background: rgba(255,255,255,.06); color: var(--text);
  border: 1px solid var(--line2);
}
.academy-tutor-btn-ghost:hover { background: rgba(255,255,255,.1); border-color: var(--line3); }
.academy-tutor-meta {
  font-family: var(--font-mono);
  font-size: .68rem; color: var(--dim);
  letter-spacing: .06em; margin-left: 4px;
}
.academy-tutor-meta[data-kind="warn"]  { color: var(--gold-lt); }
.academy-tutor-meta[data-kind="error"] { color: var(--rose-lt); }
.academy-tutor-meta[data-kind="ok"]    { color: var(--teal-lt); }
.academy-tutor-meta[data-kind="busy"]  { color: var(--blue-lt); }

.academy-tutor-out {
  margin-top: 18px;
  background: var(--bg);
  border: 1px solid var(--line2);
  border-radius: 12px;
  overflow: hidden;
}
.academy-tutor-out-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255,255,255,.03);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .62rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--dim);
}
.academy-tutor-out-head strong { color: var(--text); }
.academy-tutor-copy {
  background: transparent; border: 1px solid var(--line2);
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: .62rem; font-weight: 700; letter-spacing: .12em;
  padding: 4px 10px; border-radius: 6px; cursor: pointer;
  transition: all .15s ease;
}
.academy-tutor-copy:hover { color: var(--text); border-color: var(--line3); }
.academy-tutor-out-body {
  padding: 18px 20px;
  color: var(--text);
  font-size: .95rem; line-height: 1.65;
}
.academy-tutor-out-body h2,
.academy-tutor-out-body h3,
.academy-tutor-out-body h4 {
  font-family: var(--font-serif);
  color: #fff; margin: 18px 0 8px; line-height: 1.25;
}
.academy-tutor-out-body h2 { font-size: 1.1rem; }
.academy-tutor-out-body h3 { font-size: 1rem; color: var(--gold-lt); }
.academy-tutor-out-body h4 { font-size: .94rem; color: var(--teal-lt); }
.academy-tutor-out-body p  { margin: 8px 0; }
.academy-tutor-out-body ul,
.academy-tutor-out-body ol { margin: 8px 0 8px 20px; padding-left: 0; }
.academy-tutor-out-body li { margin: 4px 0; }
.academy-tutor-out-body strong { color: #fff; }
.academy-tutor-out-body em { color: var(--gold-lt); font-style: italic; }
.academy-tutor-out-body code { font-family: var(--font-mono); font-size: .85em; color: var(--teal-lt); background: rgba(45,212,191,.08); padding: 1px 6px; border-radius: 4px; }
.academy-tutor-loading { color: var(--dim); font-style: italic; }
.academy-tutor-error   { color: var(--rose-lt); }

.academy-case {
  margin-top: 22px;
  padding: 22px;
  background: rgba(13,148,136,.06);
  border: 1px solid rgba(45,212,191,.28);
  border-left: 3px solid var(--teal-lt);
  border-radius: 12px;
}
.academy-case-eyebrow {
  font-family: var(--font-mono);
  font-size: .62rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--teal-lt);
  margin-bottom: 8px;
}
.academy-case-title {
  font-family: var(--font-serif);
  font-size: 1.18rem; font-weight: 700;
  color: #fff; margin: 0 0 10px; line-height: 1.3;
}
.academy-case-scenario {
  color: var(--text);
  font-size: .94rem; line-height: 1.65;
  margin: 0 0 12px;
}
.academy-case-decision {
  background: rgba(0,0,0,.25);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: .92rem; color: var(--text);
  margin: 0 0 12px;
}
.academy-case-decision strong { color: var(--gold-lt); }
.academy-case-hint {
  margin: 0 0 12px;
  font-size: .92rem;
}
.academy-case-hint summary {
  cursor: pointer;
  color: var(--blue-lt);
  font-weight: 600;
  list-style: none;
  padding: 6px 0;
}
.academy-case-hint summary::-webkit-details-marker { display: none; }
.academy-case-hint summary::before { content: '▸ '; color: var(--blue-lt); }
.academy-case-hint[open] summary::before { content: '▾ '; }
.academy-case-hint summary:hover { color: var(--gold-lt); }
.academy-case-hint summary:hover::before { color: var(--gold-lt); }
.academy-case-hint p {
  margin: 6px 0 0; padding: 10px 12px;
  background: rgba(0,0,0,.2); border-left: 2px solid var(--gold-lt);
  border-radius: 6px;
  color: var(--text); line-height: 1.6;
}
.academy-case-load { margin-top: 4px; }

@media (max-width: 720px){
  .academy-tutor { padding: 20px; }
  .academy-tutor-title { font-size: 1.2rem; }
}

.architecture-map,
.workshop-grid,
.learning-loop,
.learning-principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  background: transparent;
  border: 0;
  padding: 0;
}

.architecture-map > div,
.workshop-grid > article,
.learning-loop > div,
.learning-principles > article {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-radius: 12px;
  padding: 16px 18px;
  min-height: 92px;
  transition: border-color .15s ease, transform .15s ease;
}
.architecture-map > div:hover,
.workshop-grid > article:hover,
.learning-loop > div:hover,
.learning-principles > article:hover {
  border-color: var(--line3);
  transform: translateY(-1px);
}

.architecture-map > div > strong,
.workshop-grid > article > strong,
.learning-loop > div > strong,
.learning-principles > article > strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  letter-spacing: -.01em;
}

.architecture-map > div > span,
.workshop-grid > article > span,
.learning-loop > div > span,
.learning-principles > article > span {
  display: block;
  font-size: .9rem;
  line-height: 1.55;
  color: var(--dim);
}

.learning-loop > div > strong {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .14em;
  color: var(--gold-lt);
  text-transform: uppercase;
}

.workshop-grid > article > strong {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .14em;
  color: var(--teal-lt);
  text-transform: uppercase;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}
.two-col .plain-panel { margin: 0; }
.two-col .plain-panel h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem; font-weight: 700;
  color: #fff;
  margin: 0 0 12px;
  line-height: 1.25;
}
.two-col .plain-panel ul {
  margin: 0;
  padding-left: 18px;
  display: flex; flex-direction: column; gap: 8px;
}
.two-col .plain-panel li {
  font-size: .93rem;
  line-height: 1.55;
  color: var(--text);
}
.two-col .plain-panel li strong { color: var(--gold-lt); font-weight: 700; }
.two-col .plain-panel p {
  font-size: .93rem;
  line-height: 1.6;
  color: var(--text);
  margin: 0;
}

select { color-scheme: dark; }
select option, select optgroup { background: #141c2e; color: #dce5f5; }
select option:checked, select option:hover { background: #0e1320; color: #fff; }

body.vs-academy footer {
  margin-top: 48px;
  padding: 22px 28px;
  background: var(--bg2);
  border-top: 1px solid var(--line2);
  border-radius: 0;
  color: var(--dim);
  font-size: .88rem;
  line-height: 1.6;
  text-align: left;
}
body.vs-academy footer p {
  margin: 0;
  max-width: 780px;
}
body.vs-academy footer p::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold-lt);
  margin-right: 10px;
  vertical-align: middle;
  box-shadow: 0 0 0 3px rgba(251,191,36,.18);
}

.rail-link.rail-velora {
  background: transparent;
  color: var(--gold-lt);
  font-weight: 600;
  padding: 9px 10px;
  margin: 2px 0;
}
.rail-link.rail-velora:hover {
  background: rgba(251,191,36,.08);
  color: #fff;
}
.rail-link.rail-velora::before {
  content: '✦';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  margin-right: 6px;
  color: var(--gold-lt);
  font-size: .9em;
}

.topic-filter-bar {
  margin: 24px 0 18px;
  padding: 18px;
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-radius: 14px;
  box-shadow: 0 14px 30px rgba(0,0,0,.18);
}
.topic-filter-row {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin-bottom: 14px;
}
.topic-filter-search {
  flex: 1 1 280px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--line2);
  border-radius: 10px;
  padding: 11px 14px;
  font-family: var(--font-sans);
  font-size: .94rem;
  outline: none;
  transition: border-color .15s ease, background .15s ease;
}
.topic-filter-search:focus {
  border-color: rgba(79,134,247,.55);
  background: rgba(0,0,0,.35);
}
.topic-filter-search::placeholder { color: var(--dim2); }
.topic-filter-count {
  font-family: var(--font-mono);
  font-size: .68rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--dim);
}
.topic-filter-pills {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.topic-filter-pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line2);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: .8rem; font-weight: 600;
  padding: 6px 12px;
  border-radius: 100px;
  cursor: pointer;
  transition: all .15s ease;
}
.topic-filter-pill:hover {
  background: rgba(255,255,255,.08);
  border-color: var(--line3);
}
.topic-filter-pill.is-active {
  background: rgba(26,86,219,.22);
  border-color: rgba(79,134,247,.5);
  color: #fff;
}
.topic-filter-pill-n {
  font-family: var(--font-mono);
  font-size: .68rem; font-weight: 700;
  color: var(--dim);
  background: rgba(0,0,0,.3);
  padding: 1px 6px;
  border-radius: 100px;
}
.topic-filter-pill.is-active .topic-filter-pill-n {
  color: var(--gold-lt);
  background: rgba(0,0,0,.4);
}

.topic-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
  list-style: none;
  padding: 0;
  margin: 18px 0 28px;
}
.topic-index-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--bg2);
  border: 1px solid var(--line2);
  border-radius: 12px;
  padding: 14px 16px;
  text-decoration: none;
  color: var(--text);
  transition: border-color .15s ease, transform .15s ease, background .15s ease;
  min-height: 92px;
}
.topic-index-card:hover {
  background: rgba(255,255,255,.03);
  border-color: var(--line3);
  transform: translateY(-1px);
}
.topic-index-card > span {
  display: inline-block;
  width: fit-content;
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--gold-lt);
  background: rgba(196,127,23,.14);
  border: 1px solid rgba(251,191,36,.28);
  padding: 2px 8px;
  border-radius: 6px;
}
.topic-index-card > strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
}
.topic-index-card > em {
  display: inline-block;
  width: fit-content;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--teal-lt);
  background: rgba(13,148,136,.14);
  border: 1px solid rgba(45,212,191,.28);
  padding: 2px 8px;
  border-radius: 6px;
}

.flashcard-list-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--gold-lt);
  background: rgba(196,127,23,.14);
  border: 1px solid rgba(251,191,36,.28);
  padding: 2px 7px;
  border-radius: 6px;
  margin-right: 10px;
  min-width: 28px;
  text-align: center;
}
.flashcard-list-title {
  font-family: var(--font-serif);
  font-size: .94rem;
  color: var(--text);
}
.flashcard-list-item.is-active .flashcard-list-title { color: #fff; font-weight: 700; }

.rail-subgroup{display:flex;flex-direction:column;margin:2px 0 6px 14px;padding-left:10px;border-left:1px solid rgba(255,255,255,0.10);}
.rail-subgroup .rail-sublink{font-size:.74rem;color:#9fb0d0;text-decoration:none;padding:5px 8px;border-radius:6px;}
.rail-subgroup .rail-sublink:hover{color:#fff;background:rgba(255,255,255,0.04);}
.rail-subgroup .rail-sublink.is-active{color:#fbbf24;}

html{scroll-behavior:smooth;}
.academy-pills{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:18px auto 8px;}
.academy-pills a{display:inline-flex;align-items:center;padding:8px 15px;border:1px solid rgba(255,255,255,0.12);border-radius:999px;font-size:.78rem;color:#c8d2e6;text-decoration:none;background:rgba(255,255,255,0.02);transition:border-color .15s,background .15s;}
.academy-pills a:hover{border-color:#fbbf24;background:rgba(251,191,36,0.08);}

body.vs-academy footer{background:transparent;border-top:1px solid rgba(255,255,255,0.07);border-radius:0;padding:24px;display:flex;flex-direction:column;gap:12px;text-align:center;color:inherit;font-size:inherit;line-height:normal;}
@media (min-width:640px){body.vs-academy footer{flex-direction:row;align-items:center;justify-content:space-between;padding:24px 48px;text-align:left;}}
body.vs-academy footer p{margin:0;max-width:none;}
body.vs-academy footer p::before{content:none;display:none;}
body.vs-academy footer .foot-logo{font-family:Georgia,'Times New Roman',Times,serif;font-size:1.04rem;font-weight:700;}
body.vs-academy footer .foot-logo-accent{color:#fbbf24;}
body.vs-academy footer .foot-meta{font-family:'Courier New',Courier,monospace;font-size:.66rem;color:#7a90b8;letter-spacing:.06em;}
body.vs-academy footer .foot-copy{font-size:.72rem;color:#4a5878;}

.academy-tutor-tools{display:flex;flex-wrap:wrap;gap:6px;}
.academy-tutor-tool{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);color:#c8d2e6;border-radius:8px;padding:5px 11px;font-size:.72rem;cursor:pointer;transition:border-color .15s,color .15s;}
.academy-tutor-tool:hover{border-color:#fbbf24;color:#fff;}
.academy-tutor-tool:disabled{opacity:.6;cursor:default;}

#academyRail .rail-link,#academyRail .rail-sublink{font-family:var(--font-sans)!important}
#academyRail .rail-link{font-size:.84rem!important;font-weight:500!important}
#academyRail .rail-eyebrow{font-family:var(--font-mono)!important}