:root{
  --red:#ff4b4b; --red-dk:#e03a3a; --ink:#1a1a2e; --muted:#6b7280;
  --bg:#f6f7fb; --card:#fff; --line:#e6e8ef; --code-bg:#0f1226; --code-fg:#e6e6f0;
  --green:#16a34a; --amber:#d97706; --blue:#2563eb; --radius:14px;
  --shadow:0 1px 3px rgba(20,20,50,.06),0 8px 24px rgba(20,20,50,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:var(--red);text-decoration:none}
code{background:#eef0f7;padding:.12em .4em;border-radius:6px;font-size:.88em;
  font-family:"SF Mono",Menlo,Consolas,monospace}

/* ---------- top bar ---------- */
.topbar{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:14px;padding:12px 22px;flex-wrap:nowrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;white-space:nowrap}
.brand .dot{width:26px;height:26px;border-radius:8px;background:var(--red);
  display:grid;place-items:center;color:#fff;font-size:15px;flex:0 0 auto}
.nav{display:flex;gap:2px;margin-left:6px;flex-wrap:wrap;align-items:center}
.nav button{border:0;background:none;padding:9px 12px;border-radius:10px;font-size:13.5px;
  font-weight:600;color:var(--muted);cursor:pointer;white-space:nowrap}
.nav button.active{background:var(--red);color:#fff}
.nav button:hover:not(.active){background:#f2f3f9;color:var(--ink)}
.top-right{margin-left:auto;font-size:13px;color:var(--muted);display:flex;align-items:center;gap:12px;flex-wrap:wrap}

/* hamburger toggle — hidden on desktop, shown on smaller screens */
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:38px;border:1px solid var(--line);background:var(--card);border-radius:10px;
  cursor:pointer;margin-left:auto;flex:0 0 auto}
.nav-toggle span{display:block;height:2.5px;width:20px;margin:0 auto;background:var(--ink);
  border-radius:2px;transition:.25s}
.nav-toggle.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* ---- Responsive nav: collapse the full menu into a drawer ----
   This guarantees the WHOLE menu is always reachable on any screen size
   (fixes the "homepage didn't capture the whole menu" issue). */
@media(max-width:1180px){
  .nav-toggle{display:flex}
  .topbar{flex-wrap:wrap}
  .nav{order:3;flex-basis:100%;flex-direction:column;align-items:stretch;gap:4px;
    margin:6px 0 0;max-height:0;overflow:hidden;opacity:0;
    transition:max-height .3s ease,opacity .2s ease;pointer-events:none}
  .nav.open{max-height:640px;opacity:1;pointer-events:auto;padding-top:8px;
    border-top:1px solid var(--line)}
  .nav button{width:100%;text-align:left;padding:12px 14px;font-size:15px;border-radius:10px}
  .top-right{order:2;margin-left:auto}
  .brand-text{font-size:15px}
}
@media(max-width:520px){
  .topbar{padding:10px 14px;gap:10px}
  .top-right{gap:8px}
  .nav-search{width:120px}
  .brand-text{display:none}   /* keep the S dot, drop long title on tiny phones */
}
.pybadge{padding:5px 10px;border-radius:20px;background:#f2f3f9;font-weight:600;font-size:12px}
.pybadge.ready{background:#dcfce7;color:#15803d}
.pybadge.loading{background:#fef3c7;color:#92400e}

/* ---------- layout ---------- */
.page{display:none;max-width:1280px;margin:0 auto;padding:24px}
.page.active{display:block}

/* ---------- hero ---------- */
.hero{background:linear-gradient(135deg,#fff 0%,#fff6f6 100%);border:1px solid var(--line);
  border-radius:20px;padding:42px 40px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.hero h1{font-size:38px;margin:0 0 10px;letter-spacing:-.5px}
.hero p.lead{font-size:18px;color:var(--muted);max-width:680px;margin:0 0 22px}
.hero .cta{display:inline-flex;gap:12px;flex-wrap:wrap}
.btn{border:0;cursor:pointer;font-weight:700;font-size:15px;padding:12px 22px;border-radius:12px}
.btn.primary{background:var(--red);color:#fff}
.btn.primary:hover{background:var(--red-dk)}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:28px}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px}
.stat .n{font-size:26px;font-weight:800;color:var(--red)}
.stat .l{font-size:13px;color:var(--muted)}

.section-title{font-size:22px;margin:34px 0 14px;font-weight:800}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.fcard{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow)}
.fcard .ic{font-size:24px}
.fcard h3{margin:8px 0 6px;font-size:16px}
.fcard p{margin:0;font-size:14px;color:var(--muted)}

/* ---------- learn / lessons ---------- */
.learn-grid{display:grid;grid-template-columns:280px 1fr;gap:22px;align-items:start}
.lesson-list{background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:10px;box-shadow:var(--shadow);position:sticky;top:78px;max-height:calc(100vh - 100px);overflow:auto}
.module-label{font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.6px;
  color:var(--muted);padding:14px 10px 6px}
.lesson-item{display:flex;align-items:center;gap:9px;padding:9px 10px;border-radius:9px;cursor:pointer;font-size:14px}
.lesson-item:hover{background:#f4f5fb}
.lesson-item.active{background:#fff0f0;color:var(--red);font-weight:700}
.lesson-item .chk{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);
  flex:0 0 auto;display:grid;place-items:center;font-size:11px}
.lesson-item.done .chk{background:var(--green);border-color:var(--green);color:#fff}
.lesson-item .mins{margin-left:auto;font-size:11px;color:var(--muted)}

.lesson-main{min-width:0}
.lesson-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:6px}
.lesson-head h2{margin:0;font-size:26px}
.pill{font-size:11px;font-weight:700;padding:4px 10px;border-radius:20px}
.pill.Beginner{background:#dcfce7;color:#15803d}
.pill.Intermediate{background:#fef3c7;color:#92400e}
.pill.Advanced{background:#fee2e2;color:#b91c1c}
.concepts{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0 18px}
.concepts code{background:#eef0f7}

.theory{background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:22px 26px;box-shadow:var(--shadow);margin-bottom:18px}
.theory h4{margin:18px 0 8px}
.theory blockquote{border-left:4px solid var(--red);margin:14px 0;padding:8px 16px;
  background:#fff6f6;border-radius:0 10px 10px 0;color:var(--ink)}
.theory pre.inline-code{background:var(--code-bg);color:var(--code-fg);padding:14px 16px;
  border-radius:10px;overflow:auto;font-size:13px;line-height:1.5}
.theory ul,.theory ol{padding-left:22px}

/* ---------- sandbox (split editor/output) ---------- */
.sandbox{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);
  border-radius:14px;overflow:hidden;box-shadow:var(--shadow);background:#fff}
.editor-pane,.output-pane{min-height:380px;display:flex;flex-direction:column}
.editor-pane{border-right:1px solid var(--line)}
.pane-bar{display:flex;align-items:center;gap:8px;padding:8px 12px;background:#fafbff;
  border-bottom:1px solid var(--line);font-size:12px;font-weight:700;color:var(--muted)}
.pane-bar .sp{margin-left:auto;display:flex;gap:7px}
.pane-bar button{border:0;background:#eef0f7;color:var(--ink);font-weight:700;font-size:12px;
  padding:6px 12px;border-radius:8px;cursor:pointer}
.pane-bar button.run{background:var(--red);color:#fff}
.pane-bar button.run:hover{background:var(--red-dk)}
.pane-bar button:hover{background:#e3e6f2}
.code-editor{flex:1;width:100%;border:0;resize:none;padding:16px;background:var(--code-bg);
  color:var(--code-fg);font-family:"SF Mono",Menlo,Consolas,monospace;font-size:13px;line-height:1.6;outline:none;tab-size:4}
.output-pane .out-body{flex:1;overflow:auto;padding:18px 20px;background:#fff}
.run-msg{color:var(--muted);font-style:italic}
.run-error{background:#fef2f2;border:1px solid #fecaca;border-radius:10px;padding:12px;margin-top:10px;color:#b91c1c}
.run-error pre{white-space:pre-wrap;font-size:12px;margin:6px 0 0}

/* output element styles (mimic streamlit) */
.o-title{font-size:30px;margin:.1em 0 .3em;font-weight:800}
.o-header{font-size:23px;margin:.5em 0 .3em}
.o-subheader{font-size:18px;margin:.5em 0 .3em}
.o-md,.o-write{margin:.4em 0}
.o-caption{color:var(--muted);font-size:13px;margin:.2em 0}
.o-text{background:#f6f7fb;padding:8px 10px;border-radius:8px;font-size:13px;white-space:pre-wrap}
.o-code{background:var(--code-bg);color:var(--code-fg);padding:12px 14px;border-radius:10px;
  font-family:"SF Mono",Menlo,monospace;font-size:13px;overflow:auto}
.o-json{background:#f6f7fb;border:1px solid var(--line);padding:12px;border-radius:10px;font-size:12.5px;overflow:auto}
.o-divider{border:0;border-top:1px solid var(--line);margin:14px 0}
.o-alert{padding:11px 14px;border-radius:10px;margin:8px 0;font-size:14px}
.o-alert.success{background:#dcfce7;color:#166534}
.o-alert.info{background:#dbeafe;color:#1e40af}
.o-alert.warning{background:#fef3c7;color:#92400e}
.o-alert.error{background:#fee2e2;color:#b91c1c}
.o-metric{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:6px 0;display:inline-block;min-width:130px}
.m-label{font-size:13px;color:var(--muted)}
.m-value{font-size:26px;font-weight:800}
.m-delta{font-size:13px;font-weight:700}
.m-delta.up{color:var(--green)} .m-delta.down{color:var(--red)}
.o-tablewrap{overflow:auto;border:1px solid var(--line);border-radius:10px;margin:8px 0}
.o-tableel{border-collapse:collapse;width:100%;font-size:13px}
.o-tableel th,.o-tableel td{border-bottom:1px solid var(--line);padding:7px 12px;text-align:left}
.o-tableel th{background:#fafbff;font-weight:700}
.o-tablewrap.interactive th{position:sticky;top:0}
.o-chart{margin:8px 0}
.o-legend{display:flex;gap:14px;font-size:12px;color:var(--muted);margin-top:4px}
.o-legend .lg i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:5px;vertical-align:middle}
.o-cols{display:grid;gap:14px;margin:8px 0}
.o-tabs{margin:8px 0}
.o-tabbar{display:flex;gap:4px;border-bottom:1px solid var(--line)}
.o-tabbtn{border:0;background:none;padding:8px 14px;cursor:pointer;font-weight:600;color:var(--muted);border-bottom:2px solid transparent}
.o-tabbtn.active{color:var(--red);border-bottom-color:var(--red)}
.o-tabpanel{padding:12px 2px}
.o-expander{border:1px solid var(--line);border-radius:10px;margin:8px 0;padding:4px 12px}
.o-expander summary{cursor:pointer;font-weight:600;padding:6px 0}
.o-form{border:1px solid var(--line);border-radius:12px;padding:14px;margin:8px 0;background:#fafbff}
.o-widget{margin:8px 0}
.o-widget label{display:block;font-size:13px;font-weight:600;margin-bottom:4px}
.o-widget input[type=range]{width:100%;accent-color:var(--red)}
.o-widget input[type=number],.o-widget input[type=text],.o-widget select,.o-widget textarea{
  width:100%;padding:7px 10px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit}
.o-widget.check label{display:flex;gap:8px;align-items:center;font-weight:500}
.o-button{background:var(--red);color:#fff;border:0;padding:8px 16px;border-radius:8px;font-weight:700;cursor:pointer;margin:6px 0}
.o-button:hover{background:var(--red-dk)}
.o-uploader{border:2px dashed var(--line);border-radius:10px;padding:14px;text-align:center;color:var(--muted)}
.muted{color:var(--muted)}

/* ---------- quiz ---------- */
.quiz{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 24px;
  box-shadow:var(--shadow);margin-top:18px}
.quiz h4{margin:0 0 12px}
.quiz .opt{display:block;width:100%;text-align:left;border:1px solid var(--line);background:#fff;
  border-radius:10px;padding:11px 14px;margin:7px 0;cursor:pointer;font-size:14px}
.quiz .opt:hover{border-color:var(--red)}
.quiz .opt.correct{background:#dcfce7;border-color:var(--green)}
.quiz .opt.wrong{background:#fee2e2;border-color:var(--red)}
.quiz .explain{margin-top:10px;font-size:14px;color:var(--ink);background:#f6f7fb;padding:10px 12px;border-radius:9px}
.lesson-nav{display:flex;justify-content:space-between;margin-top:20px;gap:10px}

/* ---------- generator ---------- */
.gen-grid{display:grid;grid-template-columns:380px 1fr;gap:22px;align-items:start}
.gen-form{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow)}
.gen-form label{display:block;font-size:13px;font-weight:700;margin:12px 0 5px}
.gen-form input,.gen-form select{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:9px;font-size:14px;font-family:inherit}
.feat-row{display:grid;grid-template-columns:1fr 110px 32px;gap:6px;margin:6px 0}
.feat-row input,.feat-row select{margin:0}
.feat-row .del{background:#fee2e2;color:#b91c1c;border:0;border-radius:8px;cursor:pointer;font-weight:800}
.addfeat{background:#eef0f7;border:0;border-radius:9px;padding:8px;width:100%;cursor:pointer;font-weight:700;margin-top:6px}
.chk-line{display:flex;gap:8px;align-items:center;margin:8px 0;font-size:14px;font-weight:600}
.gen-out .filebar{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.gen-out .filebar button{border:1px solid var(--line);background:#fff;padding:7px 13px;border-radius:9px;cursor:pointer;font-size:13px;font-weight:600}
.gen-out .filebar button.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.gen-out pre{background:var(--code-bg);color:var(--code-fg);padding:18px;border-radius:12px;
  overflow:auto;font-size:13px;line-height:1.6;font-family:"SF Mono",Menlo,monospace;max-height:560px}
.copybtn{float:right;background:#eef0f7;border:0;border-radius:8px;padding:6px 12px;cursor:pointer;font-weight:700;font-size:12px}

/* ---------- ref / cheatsheet ---------- */
.ref-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.ref-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;box-shadow:var(--shadow)}
.ref-card h3{margin:0 0 10px;font-size:16px}
.ref-card table{width:100%;border-collapse:collapse;font-size:13px}
.ref-card td{padding:5px 6px;border-bottom:1px solid var(--line);vertical-align:top}
.ref-card td:first-child{white-space:nowrap}

.footer{text-align:center;color:var(--muted);font-size:13px;padding:30px}

@media(max-width:900px){
  .learn-grid,.gen-grid{grid-template-columns:1fr}
  .sandbox{grid-template-columns:1fr}
  .editor-pane{border-right:0;border-bottom:1px solid var(--line)}
  .feature-grid,.ref-grid,.stat-row{grid-template-columns:1fr 1fr}
  .lesson-list{position:static;max-height:none}
}

/* ============================================================
   v1 ADDITIONS — curriculum components, branding, new widgets
   ============================================================ */

/* lesson tables inside theory */
.lesson-table{width:100%;border-collapse:collapse;margin:12px 0;font-size:13.5px}
.lesson-table th,.lesson-table td{border:1px solid var(--line);padding:8px 12px;text-align:left}
.lesson-table th{background:#fafbff;font-weight:700}
.lesson-table tr:nth-child(even) td{background:#fcfcff}
.theory .note{background:#fff6f6;border-left:4px solid var(--red);padding:10px 14px;border-radius:0 10px 10px 0;font-size:14px}

/* objectives */
.objectives{background:#eef6ff;border:1px solid #cfe3ff;border-radius:12px;padding:14px 18px;margin-bottom:16px}
.objectives .ob-title{font-weight:800;color:#1e40af;margin-bottom:6px;font-size:14px}
.objectives ul{margin:0;padding-left:20px;font-size:14px}
.objectives li{margin:3px 0}

/* challenge */
.challenge{background:#fffaf0;border:1px solid #fde68a;border-radius:12px;padding:14px 18px;margin:16px 0;font-size:14px}
.challenge .ch-badge{display:inline-block;background:#d97706;color:#fff;font-weight:800;font-size:11px;
  padding:3px 10px;border-radius:20px;margin-bottom:8px;letter-spacing:.4px}
.challenge p{margin:4px 0}

/* takeaways */
.takeaways{background:#f0fdf4;border:1px solid #bbf7d0;border-radius:12px;padding:14px 18px;margin:16px 0}
.takeaways .tk-title{font-weight:800;color:#15803d;margin-bottom:6px;font-size:14px}
.takeaways ul{margin:0;padding-left:20px;font-size:14px}
.takeaways li{margin:3px 0}

/* multiselect chips */
.ms-wrap{display:flex;flex-wrap:wrap;gap:7px}
.ms-chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:20px;
  padding:5px 12px;font-size:13px;cursor:pointer;background:#fff}
.ms-chip.on{background:#fff0f0;border-color:var(--red);color:var(--red);font-weight:600}
.ms-chip input{accent-color:var(--red)}

/* progress / image / celebrate */
.o-progress{background:#eef0f7;border-radius:20px;height:12px;overflow:hidden;margin:8px 0}
.o-progress-bar{background:var(--red);height:100%;border-radius:20px;transition:width .3s}
.o-image{margin:8px 0}
.o-image .img-ph{background:#f6f7fb;border:1px dashed var(--line);border-radius:10px;padding:18px;
  text-align:center;color:var(--muted);font-size:13px}
.o-celebrate{font-size:18px;text-align:center;padding:10px;animation:pop .4s ease}
@keyframes pop{0%{transform:scale(.7);opacity:0}100%{transform:scale(1);opacity:1}}

/* ---------- BRANDING: founder strip, footer, about ---------- */
.brand-bar{display:flex;align-items:center;gap:12px;background:linear-gradient(135deg,#1a1a2e,#2d1f3d);
  color:#fff;padding:10px 22px;font-size:13px;flex-wrap:wrap}
.brand-bar .bb-logo{font-weight:800;color:#ff7b7b}
.brand-bar .bb-sep{opacity:.4}
.brand-bar a{color:#ffd1d1}
.brand-bar .bb-right{margin-left:auto;opacity:.85}

.founder{display:grid;grid-template-columns:120px 1fr;gap:20px;background:var(--card);border:1px solid var(--line);
  border-radius:16px;padding:22px;box-shadow:var(--shadow);margin:18px 0;align-items:center}
.founder .f-avatar{width:120px;height:120px;border-radius:16px;background:linear-gradient(135deg,#ff4b4b,#2d1f3d);
  display:grid;place-items:center;color:#fff;font-size:40px;font-weight:800}
.founder h3{margin:0 0 4px;font-size:20px}
.founder .f-role{color:var(--red);font-weight:700;font-size:13px;margin-bottom:8px}
.founder p{margin:6px 0;font-size:14px;color:#444}
.founder .f-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.founder .f-links a{font-size:12.5px;font-weight:700;padding:6px 12px;border-radius:20px;
  background:#fff0f0;color:var(--red);border:1px solid #ffd1d1}
.founder .f-links a:hover{background:var(--red);color:#fff}

.brand-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:8px}
.brand-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow)}
.brand-card .ic{font-size:22px}
.brand-card h4{margin:8px 0 4px;font-size:15px}
.brand-card p{margin:0;font-size:13px;color:var(--muted)}

.site-footer{background:#1a1a2e;color:#cfd0e0;margin-top:30px;padding:28px 22px;border-radius:16px}
.site-footer .sf-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px;max-width:1180px;margin:0 auto}
@media(max-width:860px){.site-footer .sf-grid{grid-template-columns:1fr 1fr}}
.site-footer h4{color:#fff;margin:0 0 10px;font-size:15px}
.site-footer a{color:#ffb3b3;display:block;margin:4px 0;font-size:13px}
.site-footer .sf-brand{font-weight:800;color:#ff7b7b;font-size:18px}
.site-footer .sf-tag{font-style:italic;opacity:.8;margin-top:6px;font-size:13px}
.site-footer .sf-bottom{text-align:center;margin-top:22px;padding-top:16px;border-top:1px solid #33334d;
  font-size:12px;opacity:.7}

@media(max-width:760px){
  .brand-grid,.site-footer .sf-grid{grid-template-columns:1fr}
  .founder{grid-template-columns:1fr;text-align:center}
  .founder .f-avatar{margin:0 auto}
  .founder .f-links{justify-content:center}
}

/* ============================================================
   v2 — DARK MODE (variable overrides) + new components
   ============================================================ */
:root[data-theme="dark"]{
  --ink:#e8e9f3; --muted:#9aa0b4; --bg:#0f1117; --card:#181b24;
  --line:#2a2e3c; --code-bg:#05070f; --code-fg:#e6e6f0;
  --shadow:0 1px 3px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.45);
}
:root[data-theme="dark"] code{background:#23273a;color:#e8e9f3}
:root[data-theme="dark"] .topbar,
:root[data-theme="dark"] .lesson-list,
:root[data-theme="dark"] .theory,
:root[data-theme="dark"] .fcard,
:root[data-theme="dark"] .ref-card,
:root[data-theme="dark"] .gen-form,
:root[data-theme="dark"] .quiz,
:root[data-theme="dark"] .sandbox,
:root[data-theme="dark"] .stat,
:root[data-theme="dark"] .founder,
:root[data-theme="dark"] .brand-card,
:root[data-theme="dark"] .hero{background:var(--card)}
:root[data-theme="dark"] .nav button:hover:not(.active){background:#23273a;color:var(--ink)}
:root[data-theme="dark"] .nav-toggle span{background:var(--ink)}
:root[data-theme="dark"] .nav.open{background:var(--card);border-top-color:var(--line)}
:root[data-theme="dark"] .pane-bar{background:#11141d}
:root[data-theme="dark"] .out-body{background:var(--card)}
:root[data-theme="dark"] .o-tableel th,:root[data-theme="dark"] .lesson-table th{background:#11141d}
:root[data-theme="dark"] .hero{background:linear-gradient(135deg,#181b24,#241820)}

/* nav search + icon button + theme */
.nav-search{border:1px solid var(--line);background:var(--card);color:var(--ink);
  border-radius:20px;padding:7px 14px;font-size:13px;width:170px;outline:none}
.nav-search:focus{border-color:var(--red)}
.icon-btn{border:1px solid var(--line);background:var(--card);border-radius:10px;
  width:34px;height:34px;cursor:pointer;font-size:15px}
.icon-btn:hover{border-color:var(--red)}
/* (legacy nav wrap removed — responsive drawer handles small screens) */

/* toast */
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:#fff;padding:11px 20px;border-radius:30px;font-size:14px;
  font-weight:600;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.25s;z-index:200}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* generator toolbar */
.gen-toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.btn.sm{padding:7px 14px;font-size:13px}
.btn.primary.sm{background:var(--red);color:#fff}

/* notes box */
.notes-box{background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:16px 18px;box-shadow:var(--shadow);margin-top:18px}
.notes-box .nb-title{font-weight:700;margin-bottom:8px;font-size:14px}
.notes-box textarea{width:100%;min-height:90px;border:1px solid var(--line);border-radius:10px;
  padding:10px 12px;font-family:inherit;font-size:14px;background:var(--bg);color:var(--ink);resize:vertical}

/* dashboard */
.dash-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:8px}
.stat.big .n{font-size:30px;font-weight:800;color:var(--red)}
.dash-mod{margin:10px 0}
.dash-mod-head{display:flex;justify-content:space-between;font-weight:600;font-size:14px;margin-bottom:5px}
.dash-actions{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0 6px}

/* certificate */
.cert-locked{background:#fff6f6;border:1px dashed var(--red);border-radius:12px;padding:18px;
  text-align:center;color:var(--ink);font-weight:600}
:root[data-theme="dark"] .cert-locked{background:#241820}
.cert-name-row{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.cert-name-row input{flex:1;min-width:220px;padding:9px 12px;border:1px solid var(--line);
  border-radius:10px;font-size:14px;background:var(--card);color:var(--ink)}
.certificate{background:#fff;border-radius:14px;padding:14px;box-shadow:var(--shadow);overflow:auto}
.cert-border{border:6px double var(--red);border-radius:10px;padding:34px 28px;text-align:center;
  background:linear-gradient(180deg,#fff,#fff8f8);color:#1a1a2e}
.cert-logo{font-weight:800;color:var(--red);letter-spacing:.5px}
.cert-title{font-size:34px;font-weight:800;margin:14px 0 6px;letter-spacing:1px}
.cert-sub{color:#6b7280;font-size:14px;margin:6px 0}
.cert-learner{font-size:28px;font-weight:800;margin:8px 0;border-bottom:2px solid var(--line);
  display:inline-block;padding:0 24px 6px}
.cert-course{font-size:18px;font-weight:700;margin:8px auto;max-width:540px}
.cert-meta{display:flex;justify-content:center;gap:40px;margin:22px 0}
.cert-meta .cm-v{font-weight:800;font-size:18px}
.cert-meta .cm-l{font-size:12px;color:#6b7280;text-transform:uppercase;letter-spacing:.5px}
.cert-sign{display:flex;justify-content:space-around;margin-top:26px;gap:20px;flex-wrap:wrap}
.cs-line{font-weight:700;border-top:1px solid #1a1a2e;padding-top:6px;min-width:200px}
.cs-role{font-size:12px;color:#6b7280}

/* module guides */
.guide-card{display:flex;gap:16px;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:18px 20px;box-shadow:var(--shadow);margin-bottom:14px}
.guide-num{flex:0 0 46px;height:46px;border-radius:12px;background:var(--red);color:#fff;
  font-weight:800;font-size:20px;display:grid;place-items:center}
.guide-body{min-width:0}
.guide-body h3{margin:0 0 2px;font-size:18px}
.guide-tag{color:var(--red);font-weight:600;margin:0 0 8px;font-size:14px}
.guide-body p{font-size:14px;margin:6px 0}
.guide-body ul{font-size:14px;margin:4px 0;padding-left:20px}
.guide-outcome{background:#f0fdf4;border-left:4px solid var(--green);padding:8px 12px;
  border-radius:0 8px 8px 0;font-weight:600}
:root[data-theme="dark"] .guide-outcome{background:#10261a}
.guide-foot{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:10px;flex-wrap:wrap}

/* print: only show certificate */
@media print{
  .topbar,.brand-bar,.nav,.top-right,.cert-name-row,.dash-grid,.dash-mod,.dash-actions,
  .section-title,.muted,.site-footer,#toast{display:none !important}
  .page{display:block !important}
  .certificate{box-shadow:none}
}

/* ============================================================
   v3 — beginner onboarding, a11y, confetti, FAQ, filters
   ============================================================ */
:root{ --font-scale:1; }
html{ font-size: calc(16px * var(--font-scale)); }
html.dyslexia body{ letter-spacing:.03em; word-spacing:.12em; line-height:1.8; }
html.dyslexia .theory p, html.dyslexia .faq-a{ max-width:62ch; }

/* a11y controls group */
.a11y-group{display:inline-flex;gap:4px}
.icon-btn.sm{width:30px;height:30px;font-size:12px;font-weight:700;padding:0}

/* welcome banner on home */
.welcome-banner{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  background:linear-gradient(135deg,#fff0f0,#fff8e6);border:1px solid #ffd6a6;border-radius:14px;
  padding:12px 18px;margin-bottom:16px;font-size:14px}
.welcome-banner .wb-actions{display:flex;gap:8px;flex-wrap:wrap}
:root[data-theme="dark"] .welcome-banner{background:#241820;border-color:#5a3b2a}

/* welcome overlay (first-visit tour) */
.welcome-overlay{position:fixed;inset:0;background:rgba(10,10,25,.55);display:none;
  align-items:center;justify-content:center;z-index:300;padding:20px}
.welcome-overlay.show{display:flex}
.welcome-card{background:var(--card);color:var(--ink);max-width:560px;width:100%;border-radius:20px;
  padding:30px;box-shadow:var(--shadow);position:relative;animation:pop .25s ease}
.welcome-logo{font-size:22px;font-weight:800;color:var(--red)}
.welcome-lead{font-size:15px;color:var(--muted);margin:10px 0 18px}
.welcome-steps{display:flex;flex-direction:column;gap:12px;margin-bottom:20px}
.welcome-steps .ws{display:flex;gap:12px;align-items:flex-start;font-size:14px}
.welcome-steps .ws-n{flex:0 0 28px;height:28px;border-radius:50%;background:var(--red);color:#fff;
  font-weight:800;display:grid;place-items:center;font-size:13px}
.welcome-actions{display:flex;gap:10px;flex-wrap:wrap}
.welcome-skip{position:absolute;top:14px;right:16px;background:none;border:0;color:var(--muted);
  cursor:pointer;font-size:13px}
.welcome-foot{margin-top:16px;font-size:12px;color:var(--muted);text-align:center}

/* lesson list filters + bookmarks */
.ll-head{padding:10px 10px 8px;border-bottom:1px solid var(--line);margin-bottom:6px}
.ll-filter{display:flex;flex-wrap:wrap;gap:4px;margin-top:8px}
.ll-chip{border:1px solid var(--line);background:var(--card);color:var(--muted);border-radius:14px;
  padding:3px 9px;font-size:11px;font-weight:700;cursor:pointer}
.ll-chip.on{background:var(--red);color:#fff;border-color:var(--red)}
.lesson-item .li-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.li-star{cursor:pointer;color:#cbd0e0;font-size:14px;flex:0 0 auto}
.li-star.on{color:#f5a623}

/* bookmark button on lesson head */
.bm-btn{margin-left:auto;border:1px solid var(--line);background:var(--card);color:var(--muted);
  border-radius:20px;padding:5px 12px;font-size:12px;font-weight:700;cursor:pointer}
.bm-btn.on{background:#fff8e6;border-color:#f5a623;color:#b5760a}
:root[data-theme="dark"] .bm-btn.on{background:#2e2410}

/* lesson progress line + beginner hint */
.lesson-progress-line{font-size:12px;color:var(--muted);margin:2px 0 10px}
.beginner-hint{background:#eef6ff;border:1px solid #cfe3ff;border-radius:12px;padding:12px 16px;
  font-size:14px;margin-bottom:14px}
:root[data-theme="dark"] .beginner-hint{background:#10233b;border-color:#1e3a5f}

/* copy button on code blocks */
.code-copy{position:absolute;top:8px;right:8px;background:rgba(255,255,255,.12);color:#fff;border:0;
  border-radius:7px;padding:4px 10px;font-size:11px;font-weight:700;cursor:pointer}
.code-copy:hover{background:rgba(255,255,255,.25)}

/* FAQ */
.faq-intro{font-size:15px;color:var(--muted);margin-bottom:14px}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:4px 16px;
  margin-bottom:10px;box-shadow:var(--shadow)}
.faq-item summary{cursor:pointer;font-weight:700;padding:12px 0;font-size:15px}
.faq-a{padding:0 0 14px;font-size:14px;color:var(--ink);line-height:1.6}
.faq-cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}

/* confetti */
.confetti{position:fixed;top:-10px;width:10px;height:14px;opacity:.9;z-index:250;border-radius:2px;
  animation:confetti-fall linear forwards;pointer-events:none}
@keyframes confetti-fall{to{transform:translateY(105vh) rotate(540deg);opacity:.9}}

@media(max-width:760px){
  .welcome-banner{flex-direction:column;align-items:flex-start}
  .a11y-group{display:none}
}

/* ============================================================
   v3.1 — guided interactive tour
   ============================================================ */
.tour-overlay{position:fixed;inset:0;z-index:400;pointer-events:none}
.tour-dim{position:absolute;inset:0;background:rgba(10,10,25,.45);pointer-events:auto}
.tour-ring{position:absolute;border:3px solid var(--red);border-radius:12px;
  box-shadow:0 0 0 9999px rgba(10,10,25,.45);transition:.25s ease;pointer-events:none}
.tour-pop{position:absolute;width:300px;max-width:90vw;background:var(--card);color:var(--ink);
  border:1px solid var(--line);border-radius:14px;box-shadow:0 12px 40px rgba(0,0,0,.35);
  padding:16px;pointer-events:auto;z-index:401;animation:pop .2s ease}
.tour-pop .tp-step{font-size:11px;font-weight:800;color:var(--red);text-transform:uppercase;letter-spacing:.5px}
.tour-pop .tp-title{font-size:16px;font-weight:800;margin:4px 0 6px}
.tour-pop .tp-body{font-size:13.5px;color:var(--ink);line-height:1.55;margin-bottom:12px}
.tour-pop .tp-actions{display:flex;justify-content:space-between;gap:8px}