/* ============================================================================
   Principles for AI Coding — shared course theme
   Design: "Cinema Glass" (Option B) — deep black + teal→indigo glow, frosted glass.
   Type:   SukhumvitSet (bundled TTF, offline). No external requests / no CDN.
   This file is the SINGLE source of truth for the site's look — every chapter
   page + index.html render from these tokens and component classes.
   Engine hooks (owned by course.js): .site-header/.container, main.slides > section,
   .slide-scroll, .slide-controls/.slide-arrow/.slide-progress/.slide-dot,
   .slides-fixed/.slides-real, .height-toggle, [data-lang-btn], .code-block/pre/.copy-btn.
   ========================================================================== */

/* ---- Fonts: SukhumvitSet (Thai + Latin) ---------------------------------- */
@font-face{font-family:"SukhumvitSet";src:url("fonts/sukhumvitset/SukhumvitSet-Light.ttf") format("truetype");font-weight:300;font-style:normal;font-display:swap}
@font-face{font-family:"SukhumvitSet";src:url("fonts/sukhumvitset/SukhumvitSet-Text.ttf") format("truetype");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"SukhumvitSet";src:url("fonts/sukhumvitset/SukhumvitSet-Medium.ttf") format("truetype");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:"SukhumvitSet";src:url("fonts/sukhumvitset/SukhumvitSet-SemiBold.ttf") format("truetype");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"SukhumvitSet";src:url("fonts/sukhumvitset/SukhumvitSet-Bold.ttf") format("truetype");font-weight:700;font-style:normal;font-display:swap}

/* ---- Design tokens ------------------------------------------------------- */
:root{
  --bg:#0a0b12; --bg2:#0f1120;
  --glass:rgba(30,34,58,.55); --glass-2:rgba(30,34,58,.38); --glass-brd:rgba(120,130,180,.22);
  --fg:#eef1f8; --dim:#9aa3c0; --dim-2:#6b7391;
  --teal:#2dd4bf; --indigo:#818cf8; --amber:#f6a35c;
  --danger:#f87171;
  --font:"SukhumvitSet",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans Thai",sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --maxw:1080px;
  --space-1:8px; --space-2:16px; --space-3:24px; --space-4:40px; --space-5:64px;
  --radius:16px; --radius-sm:10px;
  --grad:linear-gradient(90deg,var(--teal),var(--indigo));
}

*{box-sizing:border-box}
html,body{margin:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--fg); font-family:var(--font);
  font-weight:400; line-height:1.6; -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
/* ambient light blobs — the Cinema signature (pure CSS) */
body::before,body::after{content:"";position:fixed;border-radius:50%;filter:blur(90px);opacity:.45;z-index:0;pointer-events:none}
body::before{width:520px;height:520px;background:radial-gradient(circle,#1d5a55,transparent 70%);top:-140px;right:-100px}
body::after{width:480px;height:480px;background:radial-gradient(circle,#3b3a80,transparent 70%);bottom:-160px;left:-120px}
@media (prefers-reduced-motion:no-preference){
  body.slides-mode::before{animation:drift1 26s ease-in-out infinite alternate}
  body.slides-mode::after{animation:drift2 32s ease-in-out infinite alternate}
}
@keyframes drift1{to{transform:translate(-40px,30px)}}
@keyframes drift2{to{transform:translate(50px,-30px)}}

a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}

/* ---- Language toggle mechanics ------------------------------------------- */
.lang-en-only{display:none}
body.lang-en .lang-th-only{display:none}
body.lang-en .lang-en-only{display:revert}

/* ---- Header -------------------------------------------------------------- */
.site-header{
  position:relative;z-index:5;background:var(--glass);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--glass-brd);
}
.site-header .container{
  max-width:var(--maxw);margin:0 auto;min-height:60px;
  display:flex;align-items:center;gap:var(--space-2);
  padding:10px var(--space-3);
}
.brand{font-size:15px;font-weight:600;letter-spacing:.01em;white-space:nowrap}
.brand-logo{height:24px;width:24px;vertical-align:middle;margin-right:8px}
.index-hero .hero-logo{height:80px;width:80px;display:block;margin:0 auto var(--space-3)}
.brand .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand-home{text-decoration:none;display:inline-block;transition:opacity .15s ease}
.brand-home:hover{text-decoration:none;opacity:.75}
.brand .chapter-tag{color:var(--dim);font-weight:400;font-size:12px;margin-left:6px}
.header-spacer{flex:1}

/* language pill pair */
.lang-toggle{display:inline-flex;gap:4px;background:rgba(255,255,255,.05);padding:4px;border-radius:999px}
.lang-toggle button{
  font-family:inherit;font-size:12px;font-weight:600;color:var(--dim);
  background:transparent;border:none;padding:6px 14px;border-radius:999px;cursor:pointer;
}
.lang-toggle button[aria-pressed="true"]{background:var(--grad);color:#08131a}

/* height toggle (injected by JS) */
.height-toggle{
  display:inline-flex;align-items:center;gap:8px;font-family:inherit;font-size:12px;color:var(--dim);
  background:rgba(255,255,255,.05);border:1px solid var(--glass-brd);border-radius:999px;
  padding:6px 12px;cursor:pointer;
}
.height-toggle:hover{color:var(--fg)}
.height-toggle-dot{width:9px;height:9px;border-radius:50%;background:var(--dim-2);transition:background .2s}
.height-toggle[aria-pressed="true"] .height-toggle-dot{background:var(--teal)}

/* ---- Index (non-slide) page --------------------------------------------- */
main.container{max-width:var(--maxw);margin:0 auto;padding:var(--space-5) var(--space-3);position:relative;z-index:1}
.index-hero{text-align:center;padding:var(--space-4) 0 var(--space-5)}
.index-hero h1{
  font-size:clamp(2.4rem,6vw,4.4rem);line-height:1.28;letter-spacing:-.025em;margin:0 0 var(--space-3);font-weight:700;
  padding-top:.14em;  /* SukhumvitSet: headroom for stacked Thai upper vowels / tone marks */
  background:linear-gradient(120deg,#fff 40%,#b9c4ee);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.index-hero p{color:var(--dim);font-size:clamp(1.05rem,2vw,1.35rem);max-width:60ch;margin:0 auto}
.facts{display:flex;flex-wrap:wrap;gap:var(--space-1) var(--space-3);justify-content:center;margin-top:var(--space-3);color:var(--dim);font-size:14px}
.facts b{color:var(--fg);font-weight:600}
.chapter-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--space-2)}
.chapter-card{
  display:block;background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--glass-brd);border-radius:var(--radius);padding:var(--space-3);color:inherit;
  transition:transform .2s ease,border-color .2s ease;
}
.chapter-card:hover{transform:translateY(-3px);border-color:var(--teal);text-decoration:none}
.chapter-card .num{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--teal)}
.chapter-card h3{margin:var(--space-1) 0;font-size:1.25rem;font-weight:600}
.chapter-card p{margin:0;color:var(--dim);font-size:14px;line-height:1.55}
.chapter-card.soon{opacity:.55;pointer-events:none}
.chapter-card.soon .num{color:var(--amber)}
.badge-soon{display:inline-block;margin-top:var(--space-2);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--amber);border:1px solid rgba(246,163,92,.35);border-radius:999px;padding:3px 10px}
.chapter-card.locked{opacity:.55;pointer-events:none}
/* agenda peek button — clickable even inside a locked card */
.agenda-btn{
  display:inline-flex;align-items:center;margin-top:var(--space-2);font-family:inherit;
  font-size:12px;font-weight:600;color:var(--teal);cursor:pointer;pointer-events:auto;
  background:rgba(45,212,191,.08);border:1px solid rgba(45,212,191,.35);border-radius:999px;padding:5px 12px;
  transition:background .15s;
}
.agenda-btn:hover{background:rgba(45,212,191,.16)}
.chapter-card.locked .agenda-btn{opacity:1}
.badge-locked,.badge-scheduled{display:inline-block;margin-top:var(--space-2);font-size:11px;letter-spacing:.12em;text-transform:uppercase;border-radius:999px;padding:3px 10px}
.badge-locked{color:var(--dim);border:1px solid var(--glass-brd)}
.badge-scheduled{color:var(--indigo);border:1px solid rgba(129,140,248,.35)}

/* ---- Slide deck (lesson pages) ------------------------------------------- */
main.slides{position:relative;z-index:1}
main.slides > section{display:none}
body.slides-mode main.slides > section.slide-active{display:block}
/* fixed-height mode: uniform slide height, inner scroll */
body.slides-fixed main.slides > section.slide-active{height:var(--slide-h,70vh);overflow:hidden;display:flex;flex-direction:column}
body.slides-fixed .slide-scroll{overflow-y:auto;flex:1}
.slide-scroll{
  max-width:var(--maxw);margin:0 auto;width:100%;
  padding:var(--space-4) max(var(--space-3),6vw) calc(var(--space-5) + 30px);
  display:flex;flex-direction:column;justify-content:center;min-height:100%;
}
.slide-scroll::-webkit-scrollbar{width:8px}
.slide-scroll::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:8px}
.slide-scroll::-webkit-scrollbar-track{background:transparent}
/* real-height mode: natural flow, page scrolls */
body.slides-real .slide-scroll{justify-content:flex-start;min-height:0;padding-bottom:var(--space-5)}

/* Sub-cover dividers: always full slide height, content centered — both modes */
body.slides-mode main.slides > section.subcover.slide-active{height:var(--slide-h,70vh);overflow:hidden;display:flex;flex-direction:column}
body.slides-real section.subcover .slide-scroll{justify-content:center;min-height:100%;padding-bottom:0}

/* slide content typography */
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;color:var(--teal);margin-bottom:var(--space-3)}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--teal)}
.slide-scroll h1{font-size:clamp(2.1rem,5.5vw,4rem);line-height:1.22;letter-spacing:-.025em;margin:0 0 var(--space-3);font-weight:700;
  padding-top:.12em;  /* Thai headroom (SukhumvitSet upper marks) */
  background:linear-gradient(120deg,#fff 45%,#b9c4ee);-webkit-background-clip:text;background-clip:text;color:transparent}
.slide-scroll h2{font-size:clamp(1.6rem,4vw,2.6rem);line-height:1.3;letter-spacing:-.02em;margin:0 0 var(--space-2);font-weight:700}
.slide-scroll h3{font-size:1.2rem;font-weight:600;margin:var(--space-3) 0 var(--space-1)}
.lead,.quote{max-width:60ch;color:var(--dim);font-size:clamp(1rem,2vw,1.28rem);line-height:1.75}
.quote{border-left:2px solid var(--teal);padding-left:18px}
.sub{color:var(--dim);margin:0 0 var(--space-3)}
.goal{display:inline-block;font-size:12px;color:var(--amber);border:1px solid rgba(246,163,92,.35);
  background:rgba(246,163,92,.08);padding:6px 12px;border-radius:999px;margin-bottom:var(--space-3)}
.slide-scroll p{max-width:66ch}

/* agenda / point lists (glass cards) */
.pts{list-style:none;padding:0;margin:var(--space-2) 0 0;max-width:64ch;display:grid;gap:12px}
.pts li{background:var(--glass-2);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border:1px solid var(--glass-brd);border-radius:14px;padding:15px 18px;font-size:16px;line-height:1.55}
.pts li b{color:var(--teal)}
.pts.numbered{counter-reset:pt}
.pts.numbered li{counter-increment:pt;display:flex;gap:14px}
.pts.numbered li::before{content:counter(pt);flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;font-size:13px;font-weight:600;color:#08131a;background:var(--grad)}

/* command + expected-result card (THE core teaching component)
   Structure: .cmd-card (visual glass card) > .code-block (copy-wire row: $ + <pre> + .copy-btn)
              [+ .cmd-expect (separate output block)].
   course.js copies the FIRST <pre> inside .code-block (the command), never the expected output. */
.cmd-card{max-width:70ch;border:1px solid var(--glass-brd);border-radius:var(--radius);overflow:hidden;
  background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 24px 60px rgba(0,0,0,.4);margin:var(--space-2) 0}
.code-block{padding:15px 18px;display:flex;align-items:flex-start;gap:10px;font-family:var(--mono);font-size:15px}
.cmd-card > .code-block + .cmd-expect{border-top:1px solid var(--glass-brd)}
.code-block .dollar{color:var(--teal);user-select:none;line-height:1.5}
.code-block pre{margin:0;font-family:var(--mono);color:var(--fg);font-size:14px;white-space:pre-wrap;line-height:1.5;flex:1;overflow-x:auto}
.copy-btn{margin-left:auto;font-family:var(--font);font-size:11px;color:var(--dim);
  border:1px solid var(--glass-brd);background:rgba(255,255,255,.04);border-radius:8px;padding:5px 10px;cursor:pointer;white-space:nowrap;flex:0 0 auto}
.copy-btn:hover{color:var(--teal);border-color:var(--teal)}
.copy-btn[data-copied="true"]{color:var(--teal);border-color:var(--teal)}
.cmd-expect{padding:15px 18px}
.cmd-expect .lbl{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);margin-bottom:8px}
.cmd-expect pre{margin:0;font-family:var(--mono);color:#7fe9d9;font-size:14px;white-space:pre-wrap;line-height:1.5;overflow-x:auto}
.cap{color:var(--dim-2);font-size:12px;margin-top:10px}
.worked{margin-top:var(--space-3);display:inline-flex;align-items:center;gap:8px;color:var(--teal);font-size:14px;font-weight:600}
.worked::before{content:"✓";display:inline-grid;place-items:center;width:22px;height:22px;border-radius:50%;background:rgba(45,212,191,.15);font-size:12px}

/* miniproject panel */
.miniproject{max-width:70ch;border:1px dashed var(--glass-brd);border-radius:var(--radius);padding:var(--space-3);
  background:var(--glass-2)}
.miniproject .mp-tag{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--amber);margin-bottom:var(--space-1)}
.miniproject h2{font-size:1.5rem;margin:0 0 var(--space-1)}
.mp-link{display:inline-flex;align-items:center;gap:8px;margin-top:var(--space-2);font-weight:600;
  border:1px solid var(--teal);color:var(--teal);border-radius:999px;padding:8px 16px}
.mp-link:hover{background:var(--teal);color:#08131a;text-decoration:none}

/* done-when checklist */
.donelist{list-style:none;padding:0;margin:var(--space-2) 0 0;max-width:60ch;display:grid;gap:10px}
.donelist li{display:flex;gap:12px;align-items:flex-start;color:#cdd4e8}
.donelist li::before{content:"";flex:0 0 auto;width:20px;height:20px;margin-top:2px;border-radius:6px;
  border:1.5px solid var(--teal);background:rgba(45,212,191,.08)}

/* chapter nav (last slide) */
.chapter-nav{display:flex;flex-wrap:wrap;gap:12px;margin-top:var(--space-4)}
.chapter-nav a{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--glass-brd);
  background:var(--glass-2);border-radius:999px;padding:10px 18px;color:var(--fg);font-weight:600;font-size:14px}
.chapter-nav a:hover{border-color:var(--teal);text-decoration:none}
.chapter-nav a.home{color:var(--dim)}

/* ---- Slide controls (injected by JS) ------------------------------------ */
.slide-arrow{position:fixed;top:50%;transform:translateY(-50%);width:46px;height:66px;z-index:20;cursor:pointer;
  border:1px solid var(--glass-brd);background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  color:var(--dim);font-size:24px;line-height:1;border-radius:14px}
.slide-arrow:hover:not(:disabled){color:var(--teal);border-color:var(--teal)}
.slide-arrow:disabled{opacity:.25;cursor:default}
.slide-prev{left:16px}.slide-next{right:16px}
.slide-progress{position:fixed;bottom:18px;left:0;right:0;display:flex;gap:10px;justify-content:center;align-items:center;z-index:20}
.slide-progress-text{font-size:12px;color:var(--dim);order:2;margin-left:6px;font-variant-numeric:tabular-nums}
.slide-dots{display:flex;gap:8px;order:1}
.slide-dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.18);border:none;cursor:pointer;padding:0;transition:width .2s,background .2s}
.slide-dot.active{width:24px;border-radius:4px;background:var(--grad)}

/* ---- Footer -------------------------------------------------------------- */
.site-footer{position:relative;z-index:1;text-align:center;color:var(--dim-2);font-size:13px;
  padding:var(--space-4) var(--space-3);border-top:1px solid var(--glass-brd);margin-top:var(--space-5)}

/* ---- Responsive ---------------------------------------------------------- */
@media (max-width:640px){
  .slide-arrow{width:40px;height:56px;font-size:20px}
  .slide-prev{left:8px}.slide-next{right:8px}
  .slide-scroll{padding-left:var(--space-3);padding-right:var(--space-3)}
  .site-header .container{flex-wrap:wrap;min-height:0;padding:10px var(--space-2)}
}

/* ---- Print: show all slides at natural height ---------------------------- */
@media print{
  body::before,body::after{display:none}
  .slide-arrow,.slide-progress,.lang-toggle,.height-toggle{display:none !important}
  main.slides > section{display:block !important;height:auto !important;overflow:visible !important;page-break-after:always}
  .slide-scroll{height:auto !important;overflow:visible !important;display:block !important}
  body{background:#fff;color:#000}
}

/* ---- Reduced motion ------------------------------------------------------ */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

/* ---- Auth (login / pending / admin) -------------------------------------- */
.auth-card{
  max-width:420px;margin:var(--space-5) auto;background:var(--glass);backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-brd);border-radius:var(--radius);
  padding:var(--space-4);text-align:center;
}
.auth-card h1{font-size:1.6rem;margin:0 0 var(--space-2)}
.auth-card p{color:var(--dim);font-size:14px;margin:0 0 var(--space-3)}
.auth-card .warn{color:var(--amber);font-size:12px;margin-top:var(--space-2)}
.auth-form{display:flex;flex-direction:column;gap:var(--space-2)}
.auth-form input[type="email"]{
  font-family:inherit;font-size:14px;color:var(--fg);background:rgba(255,255,255,.05);
  border:1px solid var(--glass-brd);border-radius:var(--radius-sm);padding:10px 14px;
}
.auth-form input[type="email"]:focus{outline:none;border-color:var(--teal)}
.btn{
  font-family:inherit;font-size:14px;font-weight:600;color:#08131a;background:var(--grad);
  border:none;border-radius:var(--radius-sm);padding:10px 18px;cursor:pointer;text-decoration:none;
  display:inline-block;
}
.btn:hover{opacity:.9;text-decoration:none}
.btn-outline{background:transparent;color:var(--dim);border:1px solid var(--glass-brd)}
.btn-outline:hover{color:var(--fg);border-color:var(--teal)}
.btn-danger{background:var(--danger);color:#2a0d0d}
.badge-pending{color:var(--amber);border:1px solid rgba(246,163,92,.35)}
.badge-allowed{color:var(--teal);border:1px solid rgba(45,212,191,.35)}
.badge-denied{color:var(--danger);border:1px solid rgba(248,113,113,.35)}
.badge-pending,.badge-allowed,.badge-denied{
  display:inline-block;font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  border-radius:999px;padding:3px 10px;
}
.admin-table{width:100%;border-collapse:collapse;margin-top:var(--space-3)}
.admin-table th,.admin-table td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--glass-brd);font-size:14px}
.admin-table th{color:var(--dim);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.06em}
.admin-table form{display:inline}
.top-nav{display:flex;justify-content:flex-end;gap:var(--space-2);max-width:var(--maxw);margin:0 auto;padding:var(--space-3) var(--space-3) 0}

/* resource modal */
.res-modal-backdrop{
  position:fixed;inset:0;z-index:1000;display:grid;place-items:center;
  background:rgba(5,7,15,.72);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  padding:var(--space-3);
}
.res-modal-backdrop[hidden]{display:none}
.res-modal{
  width:100%;max-width:820px;max-height:88vh;display:flex;flex-direction:column;
  background:var(--glass);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border:1px solid var(--glass-brd);border-radius:var(--radius);box-shadow:0 20px 60px rgba(0,0,0,.5);
}
.res-modal-head{
  position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);
  padding:var(--space-2) var(--space-3);border-bottom:1px solid var(--glass-brd);
}
.res-modal-title{font-weight:600;font-size:15px}
.res-modal-close{
  font-family:inherit;font-size:22px;line-height:1;color:var(--dim);background:transparent;
  border:none;cursor:pointer;padding:4px 8px;border-radius:var(--radius-sm);
}
.res-modal-close:hover{color:var(--fg);background:rgba(255,255,255,.06)}
.res-modal-tools{display:inline-flex;align-items:center;gap:6px;margin-left:auto}
.res-modal-tools[hidden]{display:none}
.res-md-raw,.res-md-dl{
  font-family:var(--mono);font-size:11.5px;font-weight:600;cursor:pointer;line-height:1;
  padding:5px 10px;border-radius:8px;color:var(--dim);background:transparent;
  border:1px solid var(--glass-brd);text-decoration:none;
}
.res-md-raw:hover,.res-md-dl:hover{color:var(--fg);border-color:var(--teal);text-decoration:none}
.res-md-raw[aria-pressed="true"]{color:#08131a;background:var(--teal);border-color:var(--teal)}
.md-raw{
  margin:0;background:#05070f;border:1px solid var(--glass-brd);border-radius:var(--radius-sm);
  padding:var(--space-2);font-family:var(--mono);font-size:12.5px;line-height:1.65;color:var(--fg);
  white-space:pre-wrap;word-break:break-word;
}
.res-modal-body{overflow-y:auto;padding:var(--space-3) var(--space-4);scrollbar-width:thin}
.res-modal-body::-webkit-scrollbar{width:8px}
.res-modal-body::-webkit-scrollbar-thumb{background:var(--glass-brd);border-radius:999px}
.res-loading,.res-error{color:var(--dim);font-size:14px}

/* markdown render */
.md-render{line-height:1.7;font-size:15px;color:var(--fg)}
.md-render h1,.md-render h2,.md-render h3,.md-render h4{
  font-weight:600;line-height:1.3;margin:var(--space-3) 0 var(--space-1);
}
.md-render h1{font-size:1.6rem}
.md-render h2{font-size:1.3rem}
.md-render h3{font-size:1.1rem}
.md-render h4{font-size:1rem;color:var(--dim)}
.md-render p{margin:0 0 var(--space-2)}
.md-render ul,.md-render ol{margin:0 0 var(--space-2);padding-left:1.4em}
.md-render li{margin:4px 0}
.md-render a{color:var(--teal)}
.md-render blockquote{
  margin:var(--space-2) 0;padding:var(--space-1) var(--space-2);border-left:3px solid var(--teal);
  color:var(--dim);background:rgba(255,255,255,.03);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
}
.md-render code{
  font-family:var(--mono);font-size:.9em;background:rgba(255,255,255,.06);
  padding:2px 6px;border-radius:6px;color:var(--teal);
}
.md-render pre{
  background:#05070f;border:1px solid var(--glass-brd);border-radius:var(--radius-sm);
  padding:var(--space-2);overflow-x:auto;margin:0 0 var(--space-2);
}
.md-render pre code{background:none;padding:0;color:var(--fg)}
.md-render table{width:100%;border-collapse:collapse;margin:0 0 var(--space-2)}
.md-render th,.md-render td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--glass-brd);font-size:14px}
.md-render th{color:var(--dim);font-weight:600}

/* csv table */
.csv-table-wrap{overflow-x:auto}
.csv-table{width:100%;border-collapse:collapse;font-size:14px}
.csv-table th,.csv-table td{padding:8px 12px;border:1px solid var(--glass-brd);white-space:nowrap}
.csv-table th{background:rgba(255,255,255,.06);color:var(--fg);font-weight:600;text-align:left}
.csv-table tbody tr:nth-child(even){background:rgba(255,255,255,.03)}

/* image preview */
.res-img{max-width:100%;border-radius:var(--radius-sm);cursor:zoom-in;display:block}

@media (prefers-reduced-motion:reduce){
  .res-modal-backdrop{backdrop-filter:none;-webkit-backdrop-filter:none}
}

/* ---- Jump-to-slide menu (caret in header) -------------------------------- */
.slide-jump-caret{
  display:inline-flex;align-items:center;justify-content:center;
  width:22px;height:22px;margin-left:8px;vertical-align:middle;
  background:rgba(255,255,255,.06);border:1px solid var(--glass-brd);border-radius:6px;
  color:var(--dim);cursor:pointer;padding:0;transition:color .15s,transform .2s;
}
.slide-jump-caret:hover{color:var(--fg)}
.slide-jump-caret[aria-expanded="true"] svg{transform:rotate(180deg)}
.slide-jump-caret svg{transition:transform .2s}

/* ---- Lootbox ------------------------------------------------------------- */
/* Trigger link (index top-nav) */
.lb-trigger{
  display:inline-flex;align-items:center;font-family:inherit;font-weight:600;font-size:14px;
  padding:8px 14px;border-radius:var(--radius-sm);cursor:pointer;color:var(--fg);
  background:var(--glass);border:1px solid var(--glass-brd);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);transition:border-color .15s,transform .15s;
}
.lb-trigger:hover{border-color:var(--teal);transform:translateY(-1px);text-decoration:none}

/* Last-slide call-to-action panel */
.lb-slide-cta{
  max-width:70ch;border:1px dashed var(--glass-brd);border-radius:var(--radius);
  padding:var(--space-3);background:var(--glass-2);
}
.lb-slide-cta .lb-tag{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--amber);margin-bottom:var(--space-1)}
.lb-slide-cta h2{font-size:1.5rem;margin:0 0 var(--space-1)}
.lb-slide-cta p{color:var(--dim);margin:0 0 var(--space-2)}
.lb-open-btn{
  display:inline-flex;align-items:center;font-family:inherit;font-weight:600;font-size:15px;cursor:pointer;
  padding:11px 18px;border-radius:var(--radius-sm);color:#08131a;border:none;background:var(--teal);
  transition:transform .15s,filter .15s;
}
.lb-open-btn:hover{transform:translateY(-1px);filter:brightness(1.06);text-decoration:none}

/* ---- Lootbox page (lootbox.php) ---- */
.lb-page{max-width:900px}
.lb-intro{margin-bottom:var(--space-3)}
.lb-intro .lb-eyebrow{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--teal);margin-bottom:6px}
.lb-intro h1{font-size:2rem;margin:0 0 var(--space-1)}
.lb-intro p{color:var(--dim);max-width:72ch}

/* Tabs */
.lb-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:var(--space-3);border-bottom:1px solid var(--glass-brd);padding-bottom:var(--space-2)}
.lb-tab{
  display:inline-flex;align-items:center;gap:8px;font-family:inherit;font-size:13.5px;cursor:pointer;
  padding:9px 14px;border-radius:var(--radius-sm);color:var(--dim);
  background:var(--glass-2);border:1px solid var(--glass-brd);transition:border-color .15s,color .15s;
}
.lb-tab:hover{color:var(--fg);border-color:var(--teal)}
.lb-tab.active{color:var(--fg);border-color:var(--teal);background:rgba(45,212,191,.1)}
.lb-tab.locked{opacity:.55;cursor:not-allowed}
.lb-tab.locked:hover{color:var(--dim);border-color:var(--glass-brd)}
.lb-tab-num{font-family:var(--mono);font-size:12px;color:var(--dim-2)}
.lb-tab.active .lb-tab-num{color:var(--teal)}
.lb-tab-title{font-weight:600}
.lb-tab-lock{font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--dim-2)}

/* Panel */
.lb-panel[hidden]{display:none}
.lb-panel-title{font-size:1.3rem;margin:0 0 var(--space-2);max-width:760px}

/* Sub-tabs (resource type, inside a chapter panel) */
.lb-subtabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:var(--space-2)}
.lb-subtab{
  display:inline-flex;align-items:center;gap:6px;font-family:inherit;font-size:12.5px;cursor:pointer;
  padding:6px 12px;border-radius:999px;color:var(--dim);
  background:var(--glass-2);border:1px solid var(--glass-brd);transition:border-color .15s,color .15s,background .15s;
}
.lb-subtab:hover{color:var(--fg);border-color:var(--teal)}
.lb-subtab.active{color:#08131a;background:var(--teal);border-color:var(--teal);font-weight:600}
.lb-count{font-family:var(--mono);font-size:11px;opacity:.75}

.lb-subpanel[hidden]{display:none}
.lb-list{list-style:none;margin:0;padding:0;display:grid;gap:var(--space-2);max-width:760px}
.lb-list-item{padding:var(--space-2);background:var(--glass-2);border:1px solid var(--glass-brd);border-radius:var(--radius-sm)}

/* Skill item (real .zip or "new skill suggestion" .md) */
.lb-skill-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:6px}
.lb-skill-name{font-family:var(--mono);font-size:13.5px;color:var(--teal);background:rgba(45,212,191,.08);padding:2px 8px;border-radius:6px}
.lb-badge{font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--amber);border:1px solid rgba(246,163,92,.4);border-radius:999px;padding:2px 8px}
.lb-skill-desc{color:var(--dim);font-size:13px;line-height:1.5;margin-bottom:10px}

/* Empty (real-or-zero) */
.lb-empty{color:var(--dim-2);font-size:13px;padding:var(--space-2) 0}
.lb-subtab.empty{opacity:.6}
.lb-subtab.empty.active{opacity:1}

.lb-prompt{position:relative}
.lb-prompt pre{
  margin:0;background:#05070f;border:1px solid var(--glass-brd);border-radius:var(--radius-sm);
  padding:12px 14px;font-family:var(--mono);font-size:12.5px;line-height:1.6;color:var(--fg);white-space:pre-wrap;
}
.lb-copy{
  margin-top:8px;font-family:inherit;font-size:12.5px;font-weight:600;cursor:pointer;
  padding:6px 12px;border-radius:8px;color:var(--fg);background:var(--glass-2);border:1px solid var(--glass-brd);
}
.lb-copy:hover{border-color:var(--teal)}
.lb-copy .lb-copy-ok{display:none;color:var(--teal)}
.lb-copy.copied .lb-copy-idle{display:none}
.lb-copy.copied .lb-copy-ok{display:inline}

.lb-download{
  display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:13.5px;
  padding:8px 14px;border-radius:var(--radius-sm);background:var(--teal);color:#08131a;border:none;
}
.lb-download:hover{filter:brightness(1.06);text-decoration:none}
.lb-link{color:var(--teal);font-weight:600;font-size:14px;word-break:break-word}
.lb-link:hover{text-decoration:underline}

.lb-locked{color:var(--dim);padding:var(--space-3) 0}

@media (prefers-reduced-motion:reduce){
  .lb-trigger:hover,.lb-open-btn:hover{transform:none}
}
.slide-jump-menu{
  position:fixed;top:64px;left:var(--space-3);z-index:60;
  min-width:300px;max-width:min(440px,90vw);max-height:min(62vh,560px);overflow-y:auto;
  background:rgba(14,16,28,.97);border:1px solid var(--glass-brd);border-radius:var(--radius-sm);
  box-shadow:0 14px 40px rgba(0,0,0,.5);padding:6px;display:none;
}
.slide-jump-menu.open{display:block}
.slide-jump-menu::-webkit-scrollbar{width:8px}
.slide-jump-menu::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:8px}
.slide-jump-item{
  display:flex;align-items:baseline;gap:10px;width:100%;text-align:left;
  background:none;border:none;border-radius:8px;padding:7px 10px;cursor:pointer;
  color:var(--dim);font-family:var(--font);font-size:13px;line-height:1.45;
}
.slide-jump-item:hover{background:rgba(255,255,255,.06);color:var(--fg)}
.slide-jump-item.active{background:rgba(45,212,191,.1);color:var(--fg)}
.slide-jump-item.active .slide-jump-num{color:var(--teal)}
.slide-jump-num{flex:0 0 26px;font-family:var(--mono);font-size:11px;color:var(--dim-2);text-align:right}
.slide-jump-title{flex:1;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.slide-jump-title br{display:none}

/* ---- Prompt tabs (ptabs) — generic tab panel used inside slides ---------- */
.ptab-row{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.ptab{
  font-family:var(--mono);font-size:11.5px;font-weight:600;cursor:pointer;line-height:1;
  padding:6px 12px;border-radius:999px;color:var(--dim);
  background:var(--glass-2);border:1px solid var(--glass-brd);transition:border-color .15s,color .15s,background .15s;
}
.ptab:hover{color:var(--fg);border-color:var(--teal)}
.ptab.active{color:#08131a;background:var(--teal);border-color:var(--teal)}
.ptab-panel[hidden]{display:none}
.ptab-panel .code-block pre{font-size:11px;line-height:1.7}