/* ============================================================
   "AI Online" dark LMS — design system for the Claude Code course
   Dark-first. Generated lesson player + home (tools/build_app.py).
   ============================================================ */
:root{
  --bg:#080B16; --bg-2:#0B0F1E; --card:#10162B; --card-2:#0E1426; --elev:#141B33;
  --line:rgba(255,255,255,.07); --line-2:rgba(255,255,255,.045);
  --text:#EAEEF9; --text-2:#9BA4BD; --muted:#6B748F;
  --accent:#3B82F6; --accent-2:#38BDF8; --cyan:#22D3EE; --violet:#8B5CF6;
  --grad:linear-gradient(135deg,#6366F1,#8B5CF6); --grad-cta:linear-gradient(135deg,#4F46E5,#7C3AED);
  --ok:#34D399; --warn:#FBBF24; --bad:#F87171; --blue-soft:rgba(59,130,246,.14); --r:16px;
  --sidebar:264px; --rail:332px; --read:760px;
  --font:'Plus Jakarta Sans','Sarabun',-apple-system,BlinkMacSystemFont,sans-serif;
  --th:'Sarabun','Plus Jakarta Sans',sans-serif; --mono:'JetBrains Mono',ui-monospace,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--th);background:var(--bg);color:var(--text);font-size:15px;line-height:1.65;
  -webkit-font-smoothing:antialiased;background-image:
   radial-gradient(60% 50% at 82% -10%,rgba(99,102,241,.12),transparent 70%),
   radial-gradient(50% 40% at -5% -5%,rgba(56,189,248,.08),transparent 70%);background-attachment:fixed}
a{color:inherit;text-decoration:none}
.en,.brand b,.logo{font-family:var(--font)}
.ic{width:20px;height:20px;flex-shrink:0;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
:focus-visible{outline:2px solid var(--accent-2);outline-offset:2px;border-radius:4px}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto}}
::-webkit-scrollbar{width:9px;height:9px}::-webkit-scrollbar-thumb{background:rgba(255,255,255,.09);border-radius:9px}

/* ---------- Sidebar (course outline) ---------- */
.sidebar{position:fixed;top:0;left:0;bottom:0;width:var(--sidebar);background:var(--bg-2);border-right:1px solid var(--line);
  display:flex;flex-direction:column;z-index:30}
.brand{display:flex;align-items:center;gap:.6rem;padding:1.1rem 1rem .9rem}
.brand-l{display:flex;align-items:center;gap:.6rem}
.logo{width:34px;height:34px;border-radius:9px;background:var(--grad);display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:.85rem;color:#fff;box-shadow:0 6px 16px rgba(99,102,241,.4)}
.brand b{font-weight:800;font-size:1.02rem}
.sb-progress{padding:.4rem 1rem .9rem;border-bottom:1px solid var(--line)}
.sb-progress .pl{display:flex;justify-content:space-between;font-size:.74rem;color:var(--text-2);margin-bottom:.4rem}
.sb-progress .pl b{color:var(--accent-2)}
.pbar{height:7px;background:rgba(255,255,255,.07);border-radius:99px;overflow:hidden}
.pbar i{display:block;height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,#3B82F6,#8B5CF6);transition:width .5s cubic-bezier(.16,1,.3,1)}
.sb-scroll{flex:1;overflow-y:auto;padding:.6rem .6rem 1rem}
.mod{margin-bottom:.1rem}
.mod>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:.6rem;padding:.6rem .6rem;border-radius:10px;
  font-weight:700;font-size:.85rem;color:var(--text);transition:.15s}
.mod>summary::-webkit-details-marker{display:none}
.mod>summary:hover{background:var(--card)}
.mod .mn{width:23px;height:23px;border-radius:7px;flex-shrink:0;background:var(--blue-soft);color:var(--accent-2);
  font-size:.74rem;font-weight:800;font-family:var(--mono);display:flex;align-items:center;justify-content:center}
.mod .mt{flex:1;line-height:1.3}
.mod .chev{width:15px;color:var(--muted);transition:transform .2s}
.mod[open] .chev{transform:rotate(90deg)}
.lessons{list-style:none;padding-left:.5rem;margin:.1rem 0 .4rem}
.lessons a{display:flex;align-items:center;gap:.5rem;padding:.42rem .55rem;border-radius:8px;font-size:.82rem;color:var(--text-2);line-height:1.3;transition:.13s}
.lessons a:hover{background:var(--card);color:var(--text)}
.lessons a.active{background:var(--blue-soft);color:#fff;box-shadow:inset 0 0 0 1px rgba(59,130,246,.25)}
.lessons .dot{width:15px;height:15px;border-radius:50%;border:2px solid var(--line);flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:.58rem}
.lessons a.done .dot{background:var(--ok);border-color:var(--ok);color:#04140C}
.lessons a.done .dot::after{content:'✓'}
.lessons .ln{font-family:var(--mono);font-size:.68rem;color:var(--muted);flex-shrink:0}
.lessons .lt{flex:1}
.sb-back{display:flex;align-items:center;gap:.4rem;padding:.85rem 1rem;border-top:1px solid var(--line);font-size:.82rem;color:var(--text-2);font-weight:600}
.sb-back:hover{color:var(--accent-2)}

/* ---------- Shell + topbar ---------- */
.shell{margin-left:var(--sidebar);min-height:100vh;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;gap:.8rem;padding:.7rem 1.2rem;border-bottom:1px solid var(--line);position:sticky;top:0;
  background:rgba(8,11,22,.82);backdrop-filter:blur(14px);z-index:18}
.tb-here{font-weight:700;font-size:.9rem;color:var(--text)}
@media(min-width:901px){.topbar{display:none}}
.hamb{display:none;width:40px;height:40px;border-radius:11px;align-items:center;justify-content:center;color:var(--text-2)}
.search{flex:1;max-width:520px;display:flex;align-items:center;gap:.6rem;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:.55rem .9rem;color:var(--text-2)}
.search input{flex:1;background:none;border:none;color:var(--text);font-family:inherit;font-size:.88rem;outline:none}
.search input::placeholder{color:var(--muted)}
.tb-right{margin-left:auto;display:flex;align-items:center;gap:.4rem}
.icon-btn{width:40px;height:40px;border-radius:11px;display:flex;align-items:center;justify-content:center;color:var(--text-2);position:relative;transition:.15s}
.icon-btn:hover{background:var(--card);color:var(--text)}
.dot{position:absolute;top:9px;right:10px;width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 2px var(--bg)}
.icon-btn .dot{top:9px;right:10px}
.profile{display:flex;align-items:center;gap:.55rem;padding:.3rem .5rem .3rem .35rem;border-radius:12px;cursor:pointer}
.profile:hover{background:var(--card)}
.av-c{width:36px;height:36px;border-radius:11px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.78rem;color:#fff;font-family:var(--font)}
.profile .nm{font-weight:700;font-size:.85rem;line-height:1.15}.profile .rl{font-size:.73rem;color:var(--text-2)}

.content{flex:1;padding:1.6rem;max-width:1120px;margin:0 auto;width:100%}
.main{display:flex;flex-direction:column;gap:1.3rem;min-width:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:1.2rem}

/* ---------- Player header ---------- */
.crumb{display:flex;align-items:center;gap:.5rem;font-size:.82rem;color:var(--text-2);flex-wrap:wrap}
.crumb .back{color:var(--accent-2);font-weight:600;display:inline-flex;align-items:center;gap:.3rem;margin-right:.3rem}
.crumb .sep{color:var(--muted)}
.les-head{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem}
.les-head h1{font-size:1.55rem;font-weight:800;letter-spacing:-.01em;line-height:1.25}
.les-head p{color:var(--text-2);margin-top:.35rem;max-width:62ch}
.ring{text-align:center;flex-shrink:0}.ring svg{width:62px;height:62px}.ring .rlbl{font-size:.68rem;color:var(--text-2);margin-top:.2rem}
.chips{display:flex;gap:.6rem;flex-wrap:wrap}
.chip-s{display:inline-flex;align-items:center;gap:.4rem;font-size:.78rem;font-weight:600;padding:.35rem .7rem;border-radius:8px;background:var(--card);border:1px solid var(--line);color:var(--text-2)}

/* cover hero */
.cover{position:relative;min-height:240px;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);
  background:radial-gradient(130% 130% at 78% 25%,#1B2747,#0A0F1F);background-size:cover;background-position:center;
  display:flex;align-items:center;padding:0 2.4rem}
.cover .ctxt{position:relative;z-index:2;max-width:62%}
.cover .ctxt .k{font-size:.76rem;color:var(--accent-2);font-weight:700;font-family:var(--font);letter-spacing:.03em}
.cover .ctxt h2{font-size:1.9rem;font-weight:800;line-height:1.16;letter-spacing:-.02em;margin-top:.45rem}
.cover .readbadge{position:absolute;left:2.4rem;bottom:1.3rem;z-index:2;display:inline-flex;align-items:center;gap:.45rem;
  background:rgba(8,11,22,.55);border:1px solid var(--line);border-radius:9px;padding:.38rem .75rem;font-size:.76rem;backdrop-filter:blur(6px)}

/* tabs */
.tabs{display:flex;gap:.2rem;border-bottom:1px solid var(--line);overflow-x:auto}
.tabs button{padding:.7rem .95rem;font-weight:600;font-size:.86rem;color:var(--text-2);border-bottom:2px solid transparent;white-space:nowrap;transition:.15s}
.tabs button.on{color:#fff;border-bottom-color:var(--accent)}
.tabs button:hover{color:var(--text)}
.tab-panel[hidden]{display:none}

/* overview layout */
.ov{display:grid;grid-template-columns:minmax(0,1fr) 232px;gap:2.2rem;align-items:start}
.ov-main{max-width:var(--read);min-width:0}
.ov-side{position:sticky;top:84px}
.toc{padding:1rem 1.1rem}
.toc-t{font-size:.7rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:.6rem;font-family:var(--font)}
.toc a{display:block;font-size:.82rem;color:var(--text-2);padding:.3rem 0 .3rem .75rem;border-left:2px solid var(--line);line-height:1.4}
.toc a:hover,.toc a.on{color:var(--accent-2);border-left-color:var(--accent-2)}
.toc a.tq{color:var(--warn);margin-top:.4rem}

/* ---------- Lesson CONTENT (dark styling for build_site output) ---------- */
.les-no{display:none}
.lead{font-size:1.12rem;color:var(--text);line-height:1.8;margin-bottom:1.6rem;font-weight:500}
.objectives{border:1px solid color-mix(in srgb,var(--accent) 24%,var(--line));background:var(--blue-soft);
  border-radius:14px;padding:1.1rem 1.3rem;margin:0 0 1.8rem}
.objectives h2{font-size:.95rem;font-weight:700;color:#fff;margin-bottom:.6rem;font-family:var(--th)}
.objectives ul{list-style:none}
.objectives li{position:relative;padding-left:1.7rem;margin:.4rem 0;color:var(--text-2);font-size:.93rem}
.objectives li::before{content:'';position:absolute;left:.2rem;top:.6em;width:8px;height:8px;border-radius:50%;background:var(--accent-2)}
figure.lesson-hero{margin:0 0 1.8rem;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--card-2)}
figure.lesson-hero img{width:100%;display:block;aspect-ratio:16/10;object-fit:cover}
figure.lesson-hero figcaption{font-size:.83rem;color:var(--muted);padding:.7rem 1rem;text-align:center;border-top:1px solid var(--line-2)}
.block{margin-bottom:2rem}
.block h3{font-size:1.22rem;font-weight:800;margin-bottom:.6rem;color:#fff;display:flex;align-items:flex-start;gap:.55rem;line-height:1.35}
.block h3::before{content:'';width:4px;height:1.05em;margin-top:.16em;background:linear-gradient(var(--accent),var(--violet));border-radius:99px;flex-shrink:0}
.block p{color:var(--text-2);margin-bottom:.8rem}
.block b,.block strong{color:var(--text);font-weight:700}
.ul,.ol{color:var(--text-2);margin:.4rem 0 .9rem 1.3rem}.ul li,.ol li{margin-bottom:.55rem}
.ul li b,.ol li b{color:var(--text)}
/* ===== Steps — a guided "do it with me" flow, one step at a time ===== */
.steps{list-style:none;counter-reset:s;margin:1.1rem 0 1.4rem;padding:0}
.st-main{flex:1;min-width:0}
.st-t{font-weight:800;color:#fff;font-size:1.06rem;line-height:1.42;margin-bottom:.3rem}
.st-d{color:var(--text-2);line-height:1.75}
.st-d:not(:last-child){margin-bottom:.7rem}
/* fallback / single step (no JS): clean numbered list with connector */
.steps .step{position:relative;counter-increment:s;padding:.1rem 0 1.15rem 2.7rem;color:var(--text-2)}
.steps .step::before{content:counter(s);position:absolute;left:0;top:-.05rem;width:2rem;height:2rem;background:var(--accent);
  color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.85rem;font-family:var(--mono)}
.steps .step:not(:last-child)::after{content:'';position:absolute;left:.97rem;top:2rem;bottom:0;width:2px;background:rgba(59,130,246,.28)}

/* ===== wired by JS → premium focus-stage stepper ===== */
.stepper{position:relative;margin:1.4rem 0 1.7rem;padding:1.2rem 1.3rem 1.25rem;border-radius:20px;
  background:radial-gradient(130% 90% at 0% 0%,rgba(59,130,246,.12),transparent 58%),linear-gradient(180deg,var(--elev),var(--card));
  border:1px solid color-mix(in srgb,var(--accent) 22%,var(--line));
  box-shadow:0 22px 46px -28px rgba(0,0,0,.85),inset 0 1px 0 rgba(255,255,255,.045)}
.steps.is-wired{margin:0;counter-reset:none}
.steps.is-wired .step{display:none;padding:0;counter-increment:none;color:var(--text-2)}
.steps.is-wired .step::before,.steps.is-wired .step::after{content:none}
.steps.is-wired .step.active{display:flex;gap:1.1rem;align-items:flex-start;animation:stepIn .42s cubic-bezier(.22,1,.36,1)}
@keyframes stepIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
/* big gradient step number — the focal anchor */
.steps.is-wired .step.active::before{content:attr(data-n);position:static;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  width:2.9rem;height:2.9rem;border-radius:16px;font-family:var(--font);font-weight:800;font-size:1.4rem;color:#fff;
  background:linear-gradient(150deg,var(--accent),var(--violet));box-shadow:0 12px 26px -8px rgba(99,102,241,.7),inset 0 1px 0 rgba(255,255,255,.28)}
/* header: segmented progress track + counter */
.st-head{display:flex;align-items:center;gap:1rem;margin-bottom:1.1rem}
.st-track{display:flex;gap:.4rem;flex:1}
.st-seg{height:6px;flex:1;border-radius:99px;background:rgba(255,255,255,.10);padding:0;cursor:pointer;transition:background .35s ease,transform .15s ease,box-shadow .2s}
.st-seg:hover{transform:scaleY(1.6)}
.st-seg.on{background:linear-gradient(90deg,var(--accent),var(--accent-2))}
.st-seg.cur{box-shadow:0 0 0 3px rgba(56,189,248,.20)}
.st-count{font-size:.78rem;font-weight:800;color:var(--accent-2);font-family:var(--font);white-space:nowrap;letter-spacing:.02em}
/* nav row */
.st-nav{display:flex;align-items:center;justify-content:space-between;gap:.8rem;margin-top:1.25rem;padding-top:1.05rem;border-top:1px solid var(--line)}
.st-prev{display:inline-flex;align-items:center;gap:.35rem;background:transparent;color:var(--text-2);border:1px solid var(--line);
  border-radius:99px;padding:.52rem 1.05rem;font-size:.85rem;font-weight:600;font-family:var(--th);transition:.16s}
.st-prev:hover:not(:disabled){color:#fff;border-color:rgba(255,255,255,.26)}
.st-prev:disabled{opacity:.32;cursor:default}
.st-next{display:inline-flex;align-items:center;gap:.55rem;background:var(--grad-cta);color:#fff;border-radius:99px;
  padding:.5rem .55rem .5rem 1.25rem;font-size:.9rem;font-weight:800;font-family:var(--th);
  box-shadow:0 12px 26px -10px rgba(124,58,237,.75);transition:transform .14s ease,filter .16s ease}
.st-next:hover{filter:brightness(1.07)}.st-next:active{transform:scale(.97)}
.st-ico{display:inline-flex;align-items:center;justify-content:center;width:1.7rem;height:1.7rem;border-radius:50%;
  background:rgba(255,255,255,.16);transition:transform .22s cubic-bezier(.22,1,.36,1)}
.st-next:hover .st-ico{transform:translateX(3px)}
/* inline prompt tray, embedded INSIDE the relevant step */
.step-prompt{margin-top:.95rem;background:var(--bg);border:1px solid color-mix(in srgb,var(--accent) 26%,var(--line));border-radius:13px;padding:.85rem .9rem}
.sp-top{display:flex;align-items:center;gap:.4rem;font-size:.76rem;font-weight:800;color:var(--accent-2);margin-bottom:.5rem;font-family:var(--font)}
.sp-text{display:block;background:transparent;color:var(--text);font-family:var(--th);font-size:.93rem;line-height:1.72;padding:0;white-space:pre-wrap;border:none;word-break:break-word}
.sp-text.sp-cmd{font-family:var(--mono);font-size:.85rem;color:#CDD6F4}
.sp-copy{margin-top:.7rem;display:inline-flex;align-items:center;gap:.4rem;background:var(--grad-cta);color:#fff;border-radius:9px;
  padding:.45rem .95rem;font-size:.82rem;font-weight:700;font-family:var(--font);box-shadow:0 6px 16px -6px rgba(79,70,229,.6);transition:transform .12s,filter .15s}
.sp-copy:hover{filter:brightness(1.07)}.sp-copy:active{transform:scale(.97)}
.sp-copy.done{background:var(--ok);color:#04140C;box-shadow:none}
@media(max-width:560px){
  .steps.is-wired .step.active{gap:.8rem}
  .steps.is-wired .step.active::before{width:2.4rem;height:2.4rem;font-size:1.15rem;border-radius:13px}
  .st-head{flex-wrap:wrap;gap:.55rem}
}
code{background:rgba(56,189,248,.12);color:#7DD3FC;padding:.12rem .42rem;border-radius:5px;font-family:var(--mono);font-size:.86em}
.code-block{background:#060912;border:1px solid var(--line);border-radius:12px;padding:1rem 1.1rem;margin:.9rem 0;position:relative;overflow-x:auto}
.code-block pre{font-family:var(--mono);font-size:.83rem;line-height:1.7;color:#CDD6F4;white-space:pre-wrap}
.ccopy{position:absolute;top:.55rem;right:.55rem;background:rgba(255,255,255,.06);border:1px solid var(--line);color:var(--text-2);border-radius:7px;padding:.2rem .55rem;font-size:.72rem;cursor:pointer}
.note{background:rgba(251,191,36,.08);border:1px solid rgba(251,191,36,.25);border-left:4px solid var(--warn);border-radius:11px;
  padding:.95rem 1.1rem;margin:1.5rem 0;font-size:.92rem;display:flex;gap:.7rem;align-items:flex-start;color:var(--text-2)}
.note .ni{font-size:1.1rem;flex-shrink:0;line-height:1.4}.note-body strong{color:var(--text)}
.prompt-box{background:var(--card);border:1px solid color-mix(in srgb,var(--accent) 30%,var(--line));border-radius:14px;padding:1.2rem;margin:1.6rem 0}
.prompt-label{display:flex;align-items:center;gap:.45rem;font-size:.82rem;color:var(--accent-2);font-weight:800;margin-bottom:.6rem}
.prompt-text{font-size:.94rem;color:var(--text);line-height:1.75;background:var(--bg);border:1px solid var(--line);border-radius:11px;padding:.95rem;white-space:pre-wrap}
.copy-btn{margin-top:.75rem;background:var(--grad-cta);color:#fff;border-radius:10px;padding:.58rem 1.2rem;font-size:.85rem;font-weight:700;font-family:var(--font);box-shadow:0 6px 16px rgba(79,70,229,.3);transition:transform .12s,filter .15s}
.copy-btn:hover{filter:brightness(1.06);transform:translateY(-1px)}.copy-btn:active{transform:scale(.98)}.copy-btn.done{background:var(--ok);box-shadow:none;color:#04140C}
.takeaways{background:linear-gradient(160deg,rgba(56,189,248,.08),var(--card));border:1px solid color-mix(in srgb,var(--accent-2) 22%,var(--line));border-radius:14px;padding:1.3rem 1.4rem;margin:2rem 0}
.tk-title{font-weight:800;font-size:1.02rem;margin-bottom:.7rem;color:#fff}
.takeaways ul{list-style:none}
.takeaways li{padding:.34rem 0 .34rem 1.8rem;position:relative;color:var(--text-2);font-size:.93rem}
.takeaways li::before{content:'✓';position:absolute;left:0;top:.4rem;width:1.2rem;height:1.2rem;background:var(--accent-2);color:#04140C;border-radius:50%;font-size:.7rem;font-weight:800;display:flex;align-items:center;justify-content:center;line-height:1}

/* quiz */
.quiz{margin:.4rem 0}
.quiz-h{font-weight:800;font-size:1.15rem;margin-bottom:.3rem;color:#fff}
.quiz-sub{font-size:.85rem;color:var(--text-2);margin-bottom:1.2rem}
.q{margin-bottom:1.5rem;max-width:var(--read)}.q:last-child{margin-bottom:0}
.q-text{font-weight:700;margin-bottom:.7rem;color:var(--text)}.q-text .qn{color:var(--accent-2);margin-right:.3rem;font-family:var(--mono)}
.choices{display:flex;flex-direction:column;gap:.55rem}
.choice{text-align:left;background:var(--card);border:1.5px solid var(--line);border-radius:11px;padding:.7rem .95rem;font-size:.92rem;font-family:inherit;color:var(--text);cursor:pointer;transition:.15s;display:flex;align-items:center;gap:.65rem}
.choice:hover:not(:disabled){border-color:var(--accent);background:rgba(59,130,246,.08)}
.choice .mk{width:22px;height:22px;border-radius:50%;border:2px solid var(--line);flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:.72rem;font-weight:800;font-family:var(--mono);color:var(--text-2)}
.choice.correct{border-color:var(--ok);background:rgba(52,211,153,.12);color:#A7F3D0}.choice.correct .mk{background:var(--ok);border-color:var(--ok);color:#04140C}
.choice.wrong{border-color:var(--bad);background:rgba(248,113,113,.1);color:#FCA5A5}.choice.wrong .mk{background:var(--bad);border-color:var(--bad);color:#1A0606}
.choice:disabled{cursor:default}
.q-explain{display:none;margin-top:.6rem;font-size:.88rem;color:var(--text-2);background:var(--card-2);border-radius:10px;padding:.65rem .85rem;border-left:3px solid var(--accent-2)}
.q-explain.show{display:block}

/* complete + prev/next */
.complete-row{margin:2.2rem 0 .5rem;padding-top:1.6rem;border-top:1px solid var(--line)}
.btn-complete{background:var(--ok);color:#04140C;border-radius:11px;padding:.7rem 1.3rem;font-size:.9rem;font-weight:800;font-family:var(--font);display:inline-flex;align-items:center;gap:.5rem;transition:transform .12s,filter .15s}
.btn-complete::before{content:'✓'}.btn-complete:hover{filter:brightness(1.05);transform:translateY(-1px)}
.btn-complete.done{background:rgba(52,211,153,.14);color:var(--ok);box-shadow:inset 0 0 0 1px var(--ok)}
.pn{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1rem}
.pn-a{display:flex;flex-direction:column;gap:.2rem;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:.9rem 1.1rem;transition:.15s}
.pn-a:hover{border-color:rgba(59,130,246,.4)}
.pn-a .d{font-size:.76rem;color:var(--accent-2);font-weight:600}.pn-a .t{font-weight:600;font-size:.9rem}
.pn-a.nx{text-align:right;background:linear-gradient(120deg,rgba(79,70,229,.18),rgba(124,58,237,.07));border-color:rgba(124,58,237,.3)}
.pn-a.disabled{opacity:.4;pointer-events:none}

/* ---------- Rail ---------- */
.rail{display:flex;flex-direction:column;gap:1.2rem;position:sticky;top:84px}
.assist{border-radius:var(--r);padding:1.2rem;background:linear-gradient(165deg,rgba(99,102,241,.16),rgba(56,189,248,.06));border:1px solid rgba(99,102,241,.32)}
.assist h3{font-size:1rem;font-weight:800;display:flex;align-items:center;gap:.5rem}
.assist .sub{font-size:.83rem;color:var(--text-2);margin:.5rem 0 .9rem}
.chip{display:flex;align-items:center;gap:.6rem;background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:11px;padding:.55rem .75rem;font-size:.82rem;font-weight:600;margin-bottom:.5rem;width:100%;text-align:left;transition:.15s}
.chip:hover{background:rgba(255,255,255,.08)}
.chip .ico{width:24px;height:24px;border-radius:7px;background:var(--blue-soft);display:flex;align-items:center;justify-content:center;color:var(--accent-2);flex-shrink:0}
.assist .ask{width:100%;margin-top:.4rem;background:var(--grad-cta);color:#fff;font-weight:700;font-size:.85rem;padding:.65rem;border-radius:11px;display:flex;align-items:center;justify-content:center;gap:.45rem;box-shadow:0 8px 20px rgba(79,70,229,.35)}
.rc-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:.6rem}
.rc-head h3{font-size:.96rem;font-weight:800}.rc-head a{font-size:.78rem;color:var(--accent-2);font-weight:600}
.note-e textarea{width:100%;min-height:80px;background:var(--card-2);border:1px solid var(--line);border-radius:10px;padding:.7rem;color:var(--text);font-family:inherit;font-size:.83rem;resize:vertical;outline:none}
.note-e textarea::placeholder{color:var(--muted)}
.disc{display:flex;gap:.6rem;padding-top:.3rem}
.disc .av{width:30px;height:30px;border-radius:9px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:800;color:#fff;flex-shrink:0}
.disc .nm{font-size:.82rem;font-weight:700}.disc .tm{font-size:.72rem;color:var(--muted);font-weight:400;margin-left:.3rem}
.disc .q{font-size:.82rem;color:var(--text-2);margin:.2rem 0 .4rem;font-weight:400}
.disc .meta{display:flex;gap:1rem;font-size:.76rem;color:var(--muted)}

/* ---------- Home ---------- */
.home{padding:2rem 1.8rem 4rem;max-width:1200px}
.hero{position:relative;overflow:hidden;border-radius:24px;padding:2.8rem 2.6rem;margin-bottom:2.2rem;
  background:radial-gradient(120% 140% at 12% 8%,rgba(99,102,241,.35),transparent 55%),radial-gradient(90% 120% at 95% 90%,rgba(56,189,248,.22),transparent 60%),var(--card);
  border:1px solid var(--line)}
.hero .k{font-size:.8rem;color:var(--accent-2);font-weight:700;font-family:var(--font);letter-spacing:.03em}
.hero h1{font-size:clamp(1.9rem,4vw,2.7rem);font-weight:800;line-height:1.12;letter-spacing:-.02em;margin:.5rem 0 .7rem;max-width:18ch}
.hero h1 em{font-style:normal;color:var(--accent-2)}
.hero p{color:var(--text-2);font-size:1.02rem;max-width:56ch;margin-bottom:1.4rem}
.hero .cta{display:inline-flex;align-items:center;gap:.5rem;background:var(--grad-cta);color:#fff;font-family:var(--font);font-weight:700;padding:.8rem 1.5rem;border-radius:12px;box-shadow:0 10px 28px rgba(79,70,229,.4)}
.hero-cta{display:flex;gap:.7rem;flex-wrap:wrap;align-items:center}
.cta2{display:inline-flex;align-items:center;gap:.5rem;background:rgba(255,255,255,.05);border:1px solid var(--line);
  color:var(--text);font-family:var(--font);font-weight:700;font-size:.92rem;padding:.7rem 1.2rem;border-radius:11px;transition:.15s}
.cta2:hover{border-color:rgba(56,189,248,.45);background:rgba(56,189,248,.08)}
.sec{font-size:1.3rem;font-weight:800;margin-bottom:1rem}
.mgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.2rem}
.mcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:1.3rem 1.4rem;transition:.18s}
.mcard:hover{border-color:rgba(59,130,246,.4);transform:translateY(-2px)}
.mc-h{display:flex;align-items:center;gap:.85rem;margin-bottom:.9rem}
.mc-h .mn{width:42px;height:42px;border-radius:12px;background:var(--grad);color:#fff;font-weight:800;font-family:var(--mono);font-size:1.05rem;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.mc-h h3{font-size:1.05rem;font-weight:700;line-height:1.25}.mc-h p{font-size:.82rem;color:var(--text-2);margin-top:1px}
.mc-h .cnt{margin-left:auto;align-self:flex-start;font-size:.74rem;color:var(--accent-2);background:var(--blue-soft);padding:.26rem .7rem;border-radius:99px;font-weight:700;font-family:var(--mono);white-space:nowrap}
.mc-list a{display:flex;align-items:center;gap:.5rem;padding:.46rem .5rem;border-radius:9px;font-size:.86rem;color:var(--text-2);transition:.13s}
.mc-list a:hover{background:rgba(59,130,246,.08);color:var(--text)}

.sb-overlay{display:none;position:fixed;inset:0;background:rgba(4,6,12,.55);z-index:25;backdrop-filter:blur(2px)}

/* ============================================================
   Workshops (dark) — glance, infographic blocks, agent demo
   ============================================================ */
.glance{background:linear-gradient(135deg,var(--blue-soft),var(--card));border:1px solid color-mix(in srgb,var(--accent) 22%,var(--line));
  border-radius:16px;padding:1.15rem 1.3rem;margin:0 0 1.7rem}
.glance-t{display:inline-flex;align-items:center;gap:.4rem;font-size:.72rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;
  color:var(--accent-2);font-family:var(--font);margin-bottom:.5rem}
.glance>p{color:var(--text);font-size:1.04rem;line-height:1.7}
.glance>p b{color:#fff}
.glance-chips{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.95rem}
.glance-chips .chip{display:inline-flex;align-items:center;gap:0;background:rgba(255,255,255,.05);border:1px solid var(--line);
  border-radius:99px;padding:.34rem .82rem;font-size:.8rem;color:var(--text-2);width:auto}
.glance-chips .chip b{color:var(--text)}
.sec-title{font-size:1.18rem;font-weight:800;color:#fff;margin:1.9rem 0 .3rem;line-height:1.3}
.sec-lead{color:var(--text-2);margin-bottom:1rem;font-size:.95rem}
/* compare grid */
.vs-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:.9rem;margin:.4rem 0 1.6rem}
.vs{position:relative;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:1.1rem 1.15rem;transition:transform .15s,border-color .15s}
.vs:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--vc) 50%,var(--line))}
.vs.is-best{border-color:color-mix(in srgb,var(--vc) 60%,var(--line));box-shadow:0 0 0 1px color-mix(in srgb,var(--vc) 38%,transparent),0 18px 32px -22px var(--vc)}
.vs.is-best::after{content:'แนะนำ';position:absolute;top:-.6rem;right:.9rem;background:var(--vc);color:#04140C;font-size:.66rem;font-weight:800;padding:.16rem .5rem;border-radius:99px;font-family:var(--font)}
.vs-ic{width:42px;height:42px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:1.35rem;background:color-mix(in srgb,var(--vc) 16%,transparent);margin-bottom:.7rem}
.vs-name{font-weight:800;font-size:1rem;color:#fff;font-family:var(--font)}
.vs-role{color:var(--text-2);font-size:.86rem;line-height:1.6;margin:.3rem 0 .85rem}
.meter{display:flex;align-items:center;gap:.28rem}
.meter i{width:18px;height:5px;border-radius:99px;background:rgba(255,255,255,.12)}
.meter i.on{background:var(--vc)}
.meter span{margin-left:.45rem;font-size:.72rem;color:var(--text-2);font-weight:600}
/* concept cards */
.concept-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.9rem;margin:.4rem 0 1.6rem}
.concept{position:relative;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:1.15rem 1.2rem 1.2rem}
.concept .c-num{width:1.9rem;height:1.9rem;border-radius:9px;background:var(--blue-soft);color:var(--accent-2);font-weight:800;font-family:var(--mono);display:flex;align-items:center;justify-content:center;font-size:.9rem;margin-bottom:.65rem}
.concept h4{font-size:1rem;font-weight:700;color:#fff;margin-bottom:.35rem;line-height:1.35}
.concept p{color:var(--text-2);font-size:.88rem;line-height:1.65}
.concept p b{color:var(--text)}
/* keypoint */
.keypoint{display:flex;gap:.8rem;align-items:flex-start;background:linear-gradient(135deg,rgba(56,189,248,.10),var(--card));
  border:1px solid color-mix(in srgb,var(--accent-2) 26%,var(--line));border-left:3px solid var(--accent-2);border-radius:13px;padding:1.05rem 1.2rem;margin:1.5rem 0}
.keypoint .kp-i{color:var(--accent-2);flex-shrink:0;margin-top:.05rem}
.keypoint p{color:var(--text);font-size:.98rem;line-height:1.65}.keypoint b{color:#fff}
/* howto wrapper (title sits above the .steps stepper) */
.howto-wrap{margin:1.7rem 0}
.howto-t{display:flex;align-items:center;gap:.5rem;font-size:1.12rem;font-weight:800;color:#fff;margin-bottom:.4rem}
.ho-badge{font-size:.68rem;font-weight:800;letter-spacing:.04em;color:var(--accent-2);background:var(--blue-soft);border-radius:99px;padding:.2rem .6rem;font-family:var(--font)}
/* agent demo (terminal, click Run) */
.agentdemo{background:#060912;border:1px solid var(--line);border-radius:14px;overflow:hidden;margin:.4rem 0 1.6rem}
.agentdemo-head{display:flex;align-items:center;gap:.45rem;padding:.7rem 1rem;border-bottom:1px solid var(--line);background:rgba(255,255,255,.02)}
.ad-dot{width:11px;height:11px;border-radius:50%;background:rgba(255,255,255,.14)}
.ad-dot:nth-child(1){background:#FB7185}.ad-dot:nth-child(2){background:#FBBF24}.ad-dot:nth-child(3){background:#34D399}
.ad-t{font-size:.82rem;color:var(--text-2);margin-left:.4rem;font-family:var(--mono)}
.ad-run{margin-left:auto;display:inline-flex;align-items:center;gap:.35rem;background:var(--grad-cta);color:#fff;border-radius:8px;padding:.34rem .95rem;font-size:.8rem;font-weight:700;font-family:var(--font);transition:filter .15s}
.ad-run::before{content:'▶';font-size:.66rem}.ad-run:hover{filter:brightness(1.08)}.ad-run:disabled{opacity:.6}
.ad-prompt{display:flex;gap:.6rem;align-items:flex-start;padding:.9rem 1.1rem;border-bottom:1px solid var(--line-2);font-size:.9rem;color:var(--text)}
.ad-prompt .lbl{flex-shrink:0;font-size:.66rem;font-weight:800;color:var(--accent-2);background:var(--blue-soft);border-radius:6px;padding:.16rem .45rem;font-family:var(--font);margin-top:.1rem}
.ad-log{list-style:none;padding:.7rem 1.1rem 1rem;margin:0;font-family:var(--mono);font-size:.83rem}
.ad-log li{display:flex;gap:.6rem;align-items:flex-start;padding:.23rem 0;color:var(--text-2);opacity:0;transform:translateX(-6px);transition:opacity .3s,transform .3s}
.ad-log li.show{opacity:1;transform:none}.ad-log li.is-done{color:var(--text)}
.ad-log .st{color:var(--accent-2);flex-shrink:0}.ad-log li.is-done .st{color:var(--ok)}
/* "coming soon" rows + category badge + per-category colour */
.ws-soon{display:flex;align-items:center;gap:.5rem;padding:.42rem .55rem;font-size:.84rem;color:var(--muted);opacity:.72}
.ws-soon .dot{width:6px;height:6px;border-radius:50%;background:var(--muted);flex-shrink:0}
.ws-soon .lt{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ws-soon em{margin-left:auto;font-style:normal;font-size:.66rem;color:var(--muted);border:1px solid var(--line);border-radius:99px;padding:.06rem .45rem;flex-shrink:0}
.ws-badge{display:inline-block;font-size:.74rem;font-weight:700;font-family:var(--font);color:var(--mc,var(--accent-2));background:color-mix(in srgb,var(--mc,var(--accent)) 14%,transparent);border-radius:99px;padding:.2rem .7rem;margin-bottom:.55rem}
.mc-h .mn{background:var(--mc,var(--grad))}
.mod[style*="--mc"] .mn{background:color-mix(in srgb,var(--mc) 20%,transparent);color:var(--mc)}
.mcard[style*="--mc"]:hover{border-color:color-mix(in srgb,var(--mc) 50%,var(--line))}

/* ============================================================
   Content search — ⌘K command palette + triggers
   ============================================================ */
.sb-switch{display:flex;gap:.25rem;margin:.1rem .8rem .7rem;padding:.25rem;background:var(--card-2);border:1px solid var(--line);border-radius:11px}
.sb-switch a{flex:1;text-align:center;padding:.44rem .5rem;border-radius:8px;font-size:.83rem;font-weight:700;color:var(--text-2);font-family:var(--th);transition:.15s}
.sb-switch a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.sb-switch a.active{background:var(--accent);color:#fff;box-shadow:0 4px 12px -5px rgba(59,130,246,.7)}
.sb-search{display:flex;align-items:center;gap:.5rem;margin:.1rem .8rem .7rem;padding:.52rem .7rem;width:calc(100% - 1.6rem);
  background:var(--card);border:1px solid var(--line);border-radius:10px;color:var(--text-2);font-family:var(--th);font-size:.85rem;cursor:pointer;transition:.15s}
.sb-search:hover{border-color:rgba(59,130,246,.4);color:var(--text)}
.sb-search span{flex:1;text-align:left}
.sb-search kbd{font-family:var(--mono);font-size:.66rem;background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:5px;padding:.1rem .35rem;color:var(--muted)}
.tb-search{margin-left:auto;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:10px;color:var(--text-2)}
.tb-search:hover{background:var(--card);color:var(--text)}
.cmdk{position:fixed;inset:0;z-index:60;display:flex;align-items:flex-start;justify-content:center;padding:12vh 1rem 1rem;
  background:rgba(4,6,12,.62);backdrop-filter:blur(4px);animation:cmdkbg .2s ease}
.cmdk[hidden]{display:none}
@keyframes cmdkbg{from{opacity:0}to{opacity:1}}
.cmdk-box{width:100%;max-width:580px;background:var(--bg-2);border:1px solid var(--line);border-radius:16px;overflow:hidden;
  box-shadow:0 30px 70px -20px rgba(0,0,0,.82);animation:cmdkin .22s cubic-bezier(.22,1,.36,1)}
@keyframes cmdkin{from{opacity:0;transform:translateY(-10px) scale(.985)}to{opacity:1;transform:none}}
.cmdk-in{display:flex;align-items:center;gap:.6rem;padding:.9rem 1.05rem;border-bottom:1px solid var(--line)}
.cmdk-in .ic{color:var(--accent-2);flex-shrink:0}
.cmdk-in input{flex:1;background:none;border:none;outline:none;color:var(--text);font-family:var(--th);font-size:1rem}
.cmdk-in input::placeholder{color:var(--muted)}
.cmdk-in kbd{font-family:var(--mono);font-size:.66rem;background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:5px;padding:.12rem .4rem;color:var(--muted)}
.cmdk-results{max-height:48vh;overflow-y:auto;padding:.4rem}
.cmdk-item{display:flex;align-items:center;gap:.7rem;padding:.6rem .7rem;border-radius:10px;cursor:pointer;color:var(--text)}
.cmdk-item.active{background:var(--blue-soft)}
.ci-tag{flex-shrink:0;font-size:.64rem;font-weight:800;font-family:var(--font);border-radius:6px;padding:.2rem .45rem}
.ci-l{background:color-mix(in srgb,var(--accent) 18%,transparent);color:var(--accent-2)}
.ci-w{background:color-mix(in srgb,var(--violet) 22%,transparent);color:#C4B5FD}
.ci-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:.1rem}
.ci-t{font-weight:600;font-size:.92rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ci-g{font-size:.73rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ci-go{color:var(--muted);opacity:0;flex-shrink:0}
.cmdk-item.active .ci-go{opacity:1;color:var(--accent-2)}
.cmdk-empty{padding:1.5rem;text-align:center;color:var(--muted);font-size:.9rem}
.cmdk-foot{display:flex;gap:1.1rem;padding:.6rem 1.05rem;border-top:1px solid var(--line);font-size:.72rem;color:var(--muted)}
.cmdk-foot b{font-family:var(--mono);color:var(--text-2);font-weight:600}

@media(max-width:1180px){.content{grid-template-columns:minmax(0,1fr)}.rail{position:static}.ov{grid-template-columns:1fr}.ov-side{display:none}}
@media(max-width:900px){
  .sidebar{transform:translateX(-100%);transition:transform .25s;box-shadow:0 0 50px rgba(0,0,0,.5)}
  body.nav-open .sidebar{transform:translateX(0)}body.nav-open .sb-overlay{display:block}
  .shell{margin-left:0}.hamb{display:flex}.mgrid{grid-template-columns:1fr}.cover .ctxt{max-width:100%}
}