/* Clear controls, quiet reading surfaces, and roriloty's own artwork. */
:root {
  --panel:#151f31;
  --muted:#b0bdd0;
  --line:#40506a;
  --control:#223149;
  --control-line:#7186a4;
}
body { font-size:15px; }
.site-header { height:88px; border-bottom-color:#52627c; }
.brand { display:inline-flex; align-items:center; gap:7px; }
.brand:before,.lesson-kicker:before {
  content:''; display:block; width:23px; height:23px; flex:none;
  background:var(--mint); mask:url('assets/paw.svg') center/contain no-repeat;
}
.brand>span { margin-left:-7px; }
.learn-brand { color:#c8d4e6; text-decoration:underline; text-underline-offset:5px; }
.site-header nav { gap:10px; font-size:12px; }
.site-header nav a { padding:10px 13px; background:var(--panel); border:1px solid var(--control-line); border-radius:5px; }
.site-header nav a:hover { background:var(--control); border-color:var(--mint); color:#fff; }
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible {
  outline:3px solid #f1c0dc; outline-offset:4px;
}
.button { background:var(--control); border-color:var(--control-line); border-bottom-width:3px; border-radius:6px; min-height:48px; font-size:13px; font-weight:600; padding:12px 18px; }
.button:hover:not(:disabled) { background:#2d415d; color:#fff; border-color:var(--mint); transform:translateY(-2px); }
.button.primary { background:var(--mint); color:#09151e; border-color:var(--mint); border-bottom-color:#3b989b; }
.button.primary:hover:not(:disabled) { background:#a2f1e7; color:#09151e; border-bottom-color:#3b989b; }
.button:active:not(:disabled) { transform:translateY(1px); }
button:disabled { opacity:.45; border-bottom-width:1px; cursor:not-allowed; }
.text-link,.note-link,.video-caption>a,.breadcrumb>a {
  color:#a5f0e6; text-decoration:underline; text-underline-offset:4px; text-decoration-thickness:1px;
}
.text-link:hover,.note-link:hover,.video-caption>a:hover,.breadcrumb>a:hover { color:#fff; }
.study-index { padding-top:36px; }
.study-heading { max-width:none; display:grid; grid-template-columns:minmax(0,1fr) 245px; gap:32px; align-items:center; margin-bottom:40px; }
.study-hero-copy { padding:15px 0; }
.course-code { color:#c0cede; font-size:11px; }
.study-heading h1 { font-size:clamp(32px,4vw,49px); }
.study-intro { color:#c8d3e2; font-size:15px; }
.study-actions { gap:22px; }
.study-actions .text-link { color:#b4f1e9; font-size:12px; padding-block:10px; }
.study-mascot { margin:0; align-self:stretch; position:relative; border:1px solid #63728d; border-bottom:4px solid #b9a4df; border-radius:8px; overflow:hidden; background:#1c2340; min-height:265px; }
.study-mascot img { width:100%; height:100%; position:absolute; inset:0; object-fit:cover; object-position:52% 28%; }
.study-mascot figcaption { position:absolute; bottom:12px; left:12px; margin:0; background:#0c1224ed; border:1px solid #a4b8cb; padding:6px 10px; border-radius:4px; font:11px/1.5 var(--mono); color:#e9edf5; }
.study-columns { grid-template-columns:minmax(0,1fr) 250px; gap:32px; }
.list-heading { border:0; padding-top:0; }
.list-heading h2 { font-size:23px; font-weight:600; }
.list-heading>span { font-size:12px; }
.course-toolbar { align-items:stretch; flex-wrap:wrap; padding:14px; background:#101a2b; border:1px solid var(--line); border-radius:6px; margin-bottom:18px; gap:12px; }
.filters { gap:7px; }
.filters button { background:var(--control); border:1px solid var(--control-line); border-radius:4px; padding:9px 11px; min-height:44px; color:#dde6f3; font-size:12px; }
.filters button:hover { background:#30435d; border-color:var(--mint); }
.filters button.active { background:var(--mint); color:#0b1923; border-color:var(--mint); font-weight:600; }
.search { flex:1 1 155px; max-width:none; }
.search input { background:#090f1e; border-color:var(--control-line); min-height:42px; border-radius:4px; font-size:12px; padding:9px 12px; }
.course-grid { gap:12px; }
.course-card { grid-template-columns:38px minmax(0,1fr) auto; align-items:start; gap:17px; padding:22px 20px; border:1px solid var(--line); border-radius:7px; background:#141e30; cursor:pointer; }
.course-card:hover,.course-card:focus-visible { border-color:var(--mint); background:#1c2c42; }
.course-card:focus-visible { outline-offset:3px; }
.course-grid>article:nth-child(2) .course-card { animation-delay:.045s; }
.course-grid>article:nth-child(3) .course-card { animation-delay:.09s; }
.course-grid>article:nth-child(4) .course-card { animation-delay:.135s; }
.course-grid>article:nth-child(n+5) .course-card { animation-delay:.18s; }
.course-number { width:36px; height:36px; display:grid; place-items:center; border:1px solid #6d7c96; border-radius:5px; background:#25314b; color:#e5d6f5; font-size:13px; padding:0; }
.course-entry h3 { font-size:17px; font-weight:600; margin-bottom:6px; }
.card-thai { color:#d3dce9; font-size:13px; }
.card-description { font-size:12px; color:#b0bed1; margin-bottom:14px; }
.row-meta { font-size:11px; gap:9px 15px; color:#b0bed1; }
.row-meta .video-badge { font-size:11px; }
.video-badge { font-size:11px; }
.video-badge.pending { color:#c9b7d9; }
.row-open { display:flex; justify-content:center; align-items:center; gap:12px; min-height:44px; padding:10px 12px; border:1px solid #8edbd7; border-bottom:3px solid #44898b; border-radius:5px; background:#a0e6df; color:#0a1826; font-size:12px; font-weight:600; white-space:nowrap; }
.row-open b { font-size:18px; font-weight:400; }
.course-card:hover .row-open,.course-card:focus-within .row-open { color:#0a1826; background:#c1f6ee; transform:translateX(2px); }
.study-notes { padding:22px 20px 0; border:1px solid var(--line); border-radius:7px; background:#101827; }
.study-notes h2 { font-size:14px; font-weight:600; }
.study-notes p { font-size:12px; }
.study-notes section:last-child { border-bottom:0; }
.author-avatar { width:48px; height:48px; border:2px solid #b9a4df; background-image:url('assets/roriloty-protogen.webp'); }
.author-note strong { font-size:14px; }
.author-note>div>span { font-size:11px; }
.note-link { padding:10px 12px; background:var(--control); border:1px solid var(--control-line); border-radius:5px; font-size:12px; }
.progress-track { height:6px; background:#34435b; border-radius:3px; }
.progress-label,.progress-label strong { font-size:11px; }
.lesson-layout { gap:38px; grid-template-columns:235px minmax(0,1fr); }
.lesson-sidebar { background:#101827; border:1px solid var(--line); border-radius:7px; padding:20px 14px; }
.lesson-sidebar>.text-link { display:flex; padding:10px; background:var(--control); border:1px solid var(--control-line); border-radius:4px; font-size:12px; margin-bottom:24px; }
.lesson-sidebar>.eyebrow { font-size:10px; padding-left:10px; }
.lesson-sidebar h2 { padding-left:10px; font-size:27px; margin-bottom:22px; }
.lesson-sidebar .progress-label,.lesson-sidebar .progress-label strong { font-size:10px; }
.lesson-sidebar nav { gap:7px; margin-top:22px; }
.lesson-nav-label { margin:22px 0 8px; font-size:11px; color:#c8d7e8; }
.lesson-nav-label span { display:none; }
.lesson-nav-label+nav { margin-top:8px; }
.lesson-sidebar nav>a { border-color:#42536e; background:#1b2840; color:#d2ddec; min-height:46px; font-size:12px; }
.lesson-sidebar nav>a:hover { background:#2a3e56; border-color:var(--mint); }
.lesson-sidebar nav>a[aria-current] { background:var(--mint); border-color:var(--mint); color:#0a1a25; font-weight:600; }
[aria-current] .sidebar-number,[aria-current] .sidebar-check { color:#123e45; }
.sidebar-number { color:#bfcbe0; }
.breadcrumb { font-size:10px; }
.lesson-kicker { gap:12px; }
.lesson-kicker:before { width:19px; height:19px; }
.lesson-kicker .eyebrow { font-size:12px; }
.lesson-heading>p.muted { font-size:14px; color:#b8c6da; }
.lesson-actions { padding:17px; border:1px solid var(--line); background:#141e30; border-radius:7px; gap:14px 18px; }
.material-info { font-size:11px; color:#c0cddd; }
.lesson-actions>.text-link { background:var(--control); border:1px solid var(--control-line); border-radius:5px; padding:12px 15px; font-size:12px; }
.minor-heading h2 { font-size:17px; font-weight:600; }
.minor-heading .mono { font-size:11px; }
.video-frame { border:1px solid #6b7d9b; background:#101827; border-radius:7px; }
.video-caption { font-size:12px; }
.video-caption>a { padding:5px 0; }
.playlist-review { border:1px solid var(--control-line); border-radius:6px; padding:0; background:var(--control); }
.playlist-review summary { padding:14px; font-size:13px; min-height:48px; }
.playlist-review[open]>p { padding-inline:14px; font-size:12px; }
.lesson-overview { background:#101827; border:1px solid var(--line); border-left:3px solid #b9a4df; border-radius:5px; padding:24px; gap:24px; margin-bottom:38px; }
.lesson-overview li { color:#c5d0e0; font-size:13px; }
.lesson-overview li>span { font-size:11px; }
.lesson-overview h2 { font-size:21px; }
.practice-intro { font-size:13px; }
.practice-label { font-size:12px; }
.mode-tabs { gap:8px; margin-bottom:12px; }
.mode-tabs>button { background:var(--control); border:1px solid var(--control-line); border-bottom:3px solid #0c1424; border-radius:6px; min-height:58px; font-size:12px; color:#e0e7f2; }
.mode-tabs>button:hover { background:#30425f; border-color:var(--mint); }
.mode-tabs>button[aria-selected=true],.mode-tabs>button[aria-selected=true]:hover { color:#0a1923; background:var(--mint); border-color:var(--mint); border-bottom-color:#3c9192; font-weight:600; }
.mode-tabs [aria-selected=true]:after { display:none; }
.mode-tabs b { background:#090f1e; color:#c6d5e9; border:1px solid #536985; font-size:10px; padding:2px 5px; }
.mode-tabs [aria-selected=true] b { color:#0a1923; background:#d0f6eb; border-color:#4c8b8a; }
#practice-panel { border:1px solid #6a7d9a; border-radius:7px; background:#141e30; }
.quiz-top { background:#1d2b41; border-bottom:1px solid var(--line); }
.quiz-top .mono,.quiz-best { font-size:11px; color:#c8d6e8; }
.quiz-progress { height:4px; }
.source-tag { font-size:11px; border-color:#697b99; color:#ddc9ef; background:#21273d; }
.source-tag + .text-link { display:block; width:fit-content; margin:10px 0 16px; font-size:12px; line-height:1.8; }
.question-content h3 { font-size:18px; }
.answer-hint { font-size:12px; }
.answer { background:#223149; border:1px solid #7186a4; border-bottom:3px solid #0c1526; min-height:60px; font-size:14px; padding:14px 16px; gap:15px; }
.answer:hover:not(:disabled) { background:#2b415d; border-color:var(--mint); }
.answer.selected { background:#244a50; border:2px solid var(--mint); border-bottom-width:3px; }
.answer-letter { width:29px; height:29px; background:#0d192b; border-color:#8495af; color:#e9f2fa; font-size:12px; }
.answer-indicator { width:21px; min-width:21px; text-align:center; color:#e0ebf7; font-size:19px; }
.answer.selected .answer-indicator { color:var(--mint); }
.answer.correct { background:#1c4645; border:2px solid var(--mint); }
.answer.incorrect { background:#4c2c41; border:2px solid #f2b3cf; }
.quiz-actions>.muted,.quiz-actions .button { font-size:12px; }
.feedback { font-size:13px; }
.feedback strong { font-size:15px; }
.feedback.success { background:#173735; border-color:#6bbaad; }
.feedback.retry { background:#392339; border-color:#c28da9; }
.match-row { background:#17243a; border-color:#526682; }
.match-row>label { font-size:14px; }
.match-row>select { background:var(--control); border-color:#8396b0; border-bottom-width:3px; min-height:48px; font-size:13px; }
.match-feedback { font-size:12px; }
.flashcard { background:#222b48; border:2px solid #b5a0db; border-bottom:5px solid #71628e; border-radius:8px; }
.flashcard:hover { background:#2b3657; }
.flashcard.is-flipped { background:#19403f; border-color:#7bd4c4; border-bottom-color:#417c76; }
.flash-eyebrow { font-size:11px; color:#ded0ef; }
.flip-hint { color:#eff0f7; background:#111b30; border:1px solid #8292ab; border-radius:4px; padding:7px 12px; margin-top:5px; font-size:12px; }
.flash-evaluation>.button { min-height:46px; font-size:12px; }
.icon-button { width:44px; height:44px; border-radius:5px; border-color:var(--control-line); border-bottom-width:3px; background:var(--control); }
.icon-button:hover { background:#354c68; border-color:var(--mint); }
.flash-tools>.text-link { font-size:12px; padding:10px 12px; border:1px solid var(--control-line); border-radius:4px; background:var(--control); color:#b4f1e9; }
.flash-note { font-size:11px; }
.lesson-resources .eyebrow { font-size:12px; }
.lesson-resources a { background:var(--control); border-color:var(--control-line); border-bottom:3px solid #0b1526; min-height:60px; font-size:13px; }
.lesson-resources a:hover { background:#30445f; border-color:var(--mint); }
.lesson-resources small { font:10px var(--mono); background:#0d182b; border:1px solid #647896; border-radius:3px; padding:4px 6px; color:#deebf7; }
.lesson-resources b { font-size:21px; }
.lesson-completion p { font-size:12px; }
.lesson-completion .button { font-size:12px; white-space:normal; }
.lesson-completion .button[aria-pressed=true] { color:#0c1c28; background:var(--mint); }
.lesson-pagination { gap:16px; }
.lesson-pagination>a { border:1px solid var(--control-line); border-radius:5px; background:var(--control); padding:15px; }
.lesson-pagination>a:hover { border-color:var(--mint); background:#2e415b; }
.lesson-pagination small { color:#b5f1e8; font-size:12px; }
.lesson-pagination strong { font-size:15px; }
.source-note { font-size:11px; }
.site-footer { font-size:11px; }
@media(max-width:1050px) {
  .study-columns { grid-template-columns:minmax(0,1fr) 225px; gap:22px; }
  .course-card { grid-template-columns:34px minmax(0,1fr); gap:12px; padding:19px 16px; }
  .row-open { grid-column:2; justify-self:start; margin-top:2px; }
  .study-heading { grid-template-columns:minmax(0,1fr) 195px; gap:22px; }
  .study-mascot { min-height:250px; }
  .lesson-layout { grid-template-columns:210px minmax(0,1fr); gap:25px; }
  .lesson-actions>.text-link { margin-left:0; }
}
@media(max-width:900px) {
  .study-columns { grid-template-columns:1fr; }
  .study-notes { margin-top:16px; }
  .lesson-layout { display:block; }
  .lesson-sidebar { position:static; margin-bottom:28px; padding:14px; gap:8px 12px; }
  .lesson-sidebar>.text-link { display:inline-flex; margin-bottom:12px; }
  .lesson-sidebar>.eyebrow,.lesson-sidebar h2 { display:none; }
  .lesson-sidebar nav { display:flex; flex-direction:row; overflow-x:auto; gap:8px; margin-top:16px; padding:3px 3px 12px; }
  .lesson-sidebar nav>a { flex:none; display:flex; min-height:44px; padding:11px; white-space:nowrap; font-size:11px; }
  .lesson-sidebar nav>a>span:nth-child(2) { display:inline; }
  .lesson-nav-label { grid-column:1/-1; margin:8px 0 0; display:flex; gap:12px; justify-content:space-between; white-space:nowrap; }
  .lesson-nav-label span { display:inline; color:#b4f1e9; }
  .lesson-sidebar .progress-label,.lesson-sidebar .progress-label strong { font-size:11px; }
  .lesson-sidebar #sidebar-progress { max-width:320px; }
  .lesson-content { min-width:0; }
}
@media(max-width:600px) {
  .site-header { width:90%; height:auto; min-height:80px; gap:12px; flex-wrap:wrap; padding-block:15px; }
  .site-header .brand { font-size:22px; }
  .brand:before { width:20px; height:20px; }
  .site-header nav { font-size:11px; }
  .site-header nav a { padding:8px 10px; min-height:40px; display:flex; align-items:center; }
  .site-header .back-home { display:none; }
  .study-index { padding-top:22px; }
  .study-heading { grid-template-columns:minmax(0,1fr) 82px; gap:12px; align-items:start; margin-bottom:28px; }
  .study-hero-copy { display:contents; }
  .course-code { grid-column:1; margin:5px 0 6px; font-size:10px; }
  .study-heading h1 { grid-column:1; grid-row:2; font-size:31px; line-height:1.18; margin:0; overflow-wrap:anywhere; }
  .study-mascot { grid-column:2; grid-row:1/span 2; width:82px; height:100px; min-height:0; align-self:center; border-bottom-width:3px; }
  .study-mascot figcaption { display:none; }
  .study-intro,.study-actions { grid-column:1/-1; }
  .study-intro { margin:10px 0 3px; font-size:14px; }
  .study-actions { gap:8px 18px; }
  .study-actions .text-link { font-size:12px; }
  .course-toolbar { padding:12px; gap:12px; }
  .filters { gap:6px; flex-wrap:wrap; }
  .filters button { font-size:11px; padding:9px 10px; }
  .search { flex-basis:100%; }
  .course-card { padding:18px 14px; grid-template-columns:32px minmax(0,1fr); gap:10px 12px; }
  .course-number { width:31px; height:33px; font-size:11px; }
  .course-entry h3 { font-size:16px; overflow-wrap:anywhere; }
  .card-thai { font-size:13px; }
  .card-description { font-size:12px; }
  .row-meta,.row-meta .video-badge { font-size:11px; }
  .row-open { min-height:44px; padding:9px 13px; font-size:12px; }
  .study-notes { padding-inline:18px; }
  .lesson-heading h1 { font-size:34px; line-height:1.16; }
  .lesson-kicker { flex-wrap:wrap; gap:9px; }
  .lesson-kicker .eyebrow,.video-badge { font-size:11px; }
  .lesson-actions { padding:14px; gap:13px; }
  .lesson-actions .button { font-size:13px; }
  .lesson-actions>.text-link { font-size:12px; padding:11px 13px; }
  .lesson-overview { padding:20px 17px; grid-template-columns:1fr; gap:16px; }
  .lesson-overview h2 { font-size:21px; }
  .lesson-overview li { font-size:13px; }
  .mode-tabs { grid-template-columns:repeat(2,minmax(0,1fr)); gap:9px; }
  .mode-tabs>button { flex-direction:row; padding:12px 8px; min-height:52px; font-size:12px; gap:7px; }
  .mode-tabs b { font-size:10px; }
  .mode-tabs small { display:none; }
  .question-content { padding:21px 16px; }
  .question-content h3 { font-size:16px; }
  .quiz-top { padding:17px 16px; }
  .quiz-top .mono,.quiz-best { font-size:10px; }
  .answer { font-size:13px; gap:10px; padding:13px 11px; }
  .answer-letter { width:26px; height:26px; font-size:11px; }
  .quiz-actions { gap:12px; }
  .quiz-actions>.muted { font-size:11px; }
  .quiz-actions .button { font-size:12px; min-height:46px; }
  .practice-intro { font-size:12px; }
  .practice-label { font-size:11px; }
  .feedback { padding:15px; font-size:12px; }
  .match-row>select { font-size:12px; }
  .flash-text { font-size:18px; }
  .flash-nav { flex-wrap:wrap; justify-content:center; }
  .flash-evaluation { order:2; width:100%; justify-content:center; }
  .flash-evaluation>.button { font-size:12px; padding:11px 12px; }
  .flash-tools { gap:9px; flex-wrap:wrap; }
  .flash-tools>.text-link { font-size:11px; }
  .lesson-resources a { font-size:13px; padding:15px; }
  .lesson-pagination { gap:10px; }
  .lesson-pagination>a { padding:13px 11px; }
  .lesson-pagination small { font-size:11px; }
  .lesson-pagination strong { font-size:13px; overflow-wrap:anywhere; }
  .site-footer { flex-wrap:wrap; gap:12px; font-size:10px; }
}
@media(prefers-reduced-motion:reduce) { .button,.row-open { transform:none!important; } }