/* ===== STA191 · Fundamentals of Data Visualization =====
   Playful theme (Fredoka + Inter) — static, GitHub-Pages ready.
   Converted from the Claude Design "STA191 Course UI Refresh". */

:root{
  --bg:#f5f6fc;
  --surface:#ffffff;
  --ink:#141b30;
  --ink-2:#2a3350;
  --muted:#5b657f;
  --muted-2:#6b7492;
  --line:#e9ebf6;
  --line-2:#e4e7f3;

  --primary:#4f46e5;
  --primary-2:#6366f1;
  --primary-ink:#3730a3;
  --primary-wash:#eef0fe;
  --primary-wash-line:#e2e5fb;

  --accent:#14b8a6;
  --accent-2:#0d9488;
  --accent-ink:#0b6b63;
  --accent-wash:#e3f7f4;
  --accent-wash-line:#cdeee9;

  --warn:#f59e0b;
  --warn-ink:#8a5a00;
  --warn-wash:#fdf3dd;
  --warn-wash-line:#f4e4b8;

  --rose:#e11d63;
  --rose-ink:#c2185b;
  --rose-wash:#fde7ef;
  --rose-wash-line:#f8cfdd;

  --coral:#ff7a59;

  --maxw:1120px;
  --shadow-xs:0 1px 2px rgba(20,27,48,.05);
  --shadow:0 1px 2px rgba(20,27,48,.04),0 12px 28px rgba(20,27,48,.06);
  --shadow-md:0 1px 2px rgba(20,27,48,.04),0 12px 28px rgba(20,27,48,.07);
  --shadow-hover:0 16px 36px rgba(20,27,48,.12);
  --display:'Fredoka','Inter',system-ui,sans-serif;
  --font:'Inter',system-ui,-apple-system,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-ink)}
img{max-width:100%}
::selection{background:rgba(99,102,241,.22)}
h1,h2,h3,h4{font-family:var(--display);font-weight:600;letter-spacing:-.01em;line-height:1.12}
strong{color:var(--ink-2)}

@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes pop{from{opacity:0;transform:scale(.94)}to{opacity:1;transform:none}}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}
@keyframes grow{from{transform:scaleY(0)}to{transform:scaleY(1)}}

/* ---------- Nav ---------- */
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.8);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:.7rem 1.25rem;display:flex;align-items:center;gap:1rem}
.brand{display:flex;align-items:center;gap:.65rem;font-family:var(--display);font-weight:600;color:var(--ink);font-size:1.12rem;line-height:1.05}
.brand:hover{color:var(--ink)}
.brand .logo{width:40px;height:40px;border-radius:13px;display:grid;place-items:center;font-size:1.15rem;background:linear-gradient(135deg,var(--primary),var(--accent));box-shadow:0 5px 14px rgba(79,70,229,.34),inset 0 1px 0 rgba(255,255,255,.4)}
.brand small{display:block;font-family:var(--font);font-weight:500;color:var(--muted-2);font-size:.68rem}
.nav-links{margin-left:auto;display:flex;gap:.3rem;align-items:center}
.nav-links a{padding:.5rem .85rem;border-radius:11px;font-weight:600;font-size:.92rem;color:var(--muted);transition:all .15s}
.nav-links a:hover{color:var(--ink);background:var(--primary-wash)}
.nav-links a.active{color:var(--primary-ink);background:var(--primary-wash);font-weight:800}
.nav-links a.cta{color:#fff;background:linear-gradient(120deg,var(--primary),var(--primary-2));box-shadow:0 4px 12px rgba(79,70,229,.28)}
.nav-links a.cta:hover{color:#fff;filter:brightness(1.07)}
.nav-toggle{display:none;margin-left:auto;width:44px;height:44px;border-radius:13px;border:1px solid var(--line-2);background:#fff;cursor:pointer;font-size:1.2rem;line-height:1}

/* ---------- Layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.25rem}
.section{padding:clamp(2.8rem,6vw,4.5rem) 0}
.section.tint{background:linear-gradient(180deg,#fff,#f9fafe);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.eyebrow{display:inline-block;text-transform:uppercase;letter-spacing:.14em;font-size:.72rem;font-weight:800;color:var(--accent-ink);margin-bottom:.4rem}
.section-title{font-size:clamp(1.6rem,3vw,2.1rem);margin:.1rem 0 1.6rem;max-width:24ch}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:radial-gradient(1000px 420px at 88% -12%,rgba(20,184,166,.18),transparent 62%),radial-gradient(820px 480px at -6% 4%,rgba(99,102,241,.22),transparent 58%),linear-gradient(180deg,#fff,var(--bg))}
.blob{position:absolute;pointer-events:none;animation:floaty 7s ease-in-out infinite}
.blob-1{top:12%;right:8%;width:120px;height:120px;border-radius:32px;background:linear-gradient(135deg,var(--coral),var(--warn));opacity:.16}
.blob-2{bottom:14%;right:24%;width:70px;height:70px;border-radius:50%;background:var(--accent);opacity:.14;animation-duration:5.5s}
.hero-inner{position:relative;max-width:var(--maxw);margin:0 auto;padding:clamp(3rem,7vw,4.8rem) 1.25rem clamp(2.8rem,6vw,3.8rem)}
.tag{display:inline-flex;gap:.5rem;align-items:center;background:rgba(255,255,255,.9);border:1px solid #e6e8f4;padding:.42rem .9rem;border-radius:999px;font-size:.8rem;font-weight:700;color:var(--ink-2);box-shadow:var(--shadow-xs)}
.hero h1{font-size:clamp(2.3rem,5.6vw,3.7rem);line-height:1.04;margin:1.1rem 0 .7rem;max-width:15ch}
.hero h1 .grad,.grad{background:linear-gradient(115deg,var(--primary) 10%,var(--accent) 92%);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(1.02rem,1.6vw,1.18rem);color:var(--muted);max-width:62ch;margin:0 0 1.7rem}
.cta-row{display:flex;gap:.75rem;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:.5rem;font-weight:700;border-radius:14px;padding:.85rem 1.4rem;cursor:pointer;font-size:.98rem;border:none;font-family:var(--font);transition:transform .15s,box-shadow .15s,filter .15s}
.btn-primary{color:#fff;background:linear-gradient(120deg,var(--primary),var(--primary-2));box-shadow:0 12px 30px rgba(79,70,229,.32)}
.btn-primary:hover{color:#fff;filter:brightness(1.07);transform:translateY(-2px)}
.btn-ghost{color:var(--ink);background:#fff;border:1px solid var(--line-2);box-shadow:var(--shadow-xs)}
.btn-ghost:hover{color:var(--ink);transform:translateY(-2px);border-color:#cfd4ee}
.hero-badges{display:flex;gap:.55rem;flex-wrap:wrap;margin-top:1.9rem}
.hero-badges span{background:rgba(255,255,255,.85);border:1px solid #e6e8f4;border-radius:999px;padding:.4rem .9rem;font-size:.82rem;color:var(--ink-2);font-weight:600}

/* ---------- Grid + cards ---------- */
.grid{display:grid;gap:1.1rem}
.cols-2{grid-template-columns:1.05fr .95fr;gap:2rem;align-items:start}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:1.5rem;box-shadow:var(--shadow)}
.card h3{margin:0 0 .4rem;font-size:1.15rem}
.glance{width:100%;border-collapse:collapse;font-size:.94rem}
.glance td{padding:.6rem 0;border-bottom:1px solid #f0f2f9;color:var(--muted)}
.glance tr:last-child td{border-bottom:none}
.glance td:last-child{text-align:right;color:var(--ink)}

/* assessment */
.assess-card{position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:20px;padding:1.4rem;box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s}
.assess-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.assess-card::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.assess-card.final::before{background:linear-gradient(90deg,var(--coral),var(--warn))}
.assess-card .pct{font-family:var(--display);font-weight:700;font-size:2.4rem;line-height:1;background:linear-gradient(120deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.assess-card.final .pct{background:linear-gradient(120deg,var(--coral),var(--warn));-webkit-background-clip:text;background-clip:text;color:transparent}
.assess-card h3{margin:.5rem 0 .15rem;font-size:1.08rem}
.assess-card p{margin:0;color:var(--muted);font-size:.88rem}
.when{margin-top:.85rem;display:inline-flex;font-size:.72rem;font-weight:800;color:var(--accent-ink);background:var(--accent-wash);padding:.25rem .65rem;border-radius:999px;text-transform:uppercase;letter-spacing:.04em}
.when.warn{color:var(--warn-ink);background:var(--warn-wash)}
.note{color:var(--muted);font-size:.9rem;margin-top:1.1rem}

/* topics / weeks */
.topic{margin-bottom:2rem}
.topic h3{display:flex;align-items:center;gap:.65rem;font-size:1.12rem;margin:0 0 .9rem}
.chip{font-family:var(--font);font-size:.68rem;font-weight:800;letter-spacing:.03em;color:#fff;padding:.2rem .55rem;border-radius:8px;background:linear-gradient(120deg,var(--primary),var(--primary-2))}
.weeks{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem}
.weekcard{display:flex;flex-direction:column;gap:.15rem;background:#fff;border:1px solid var(--line);border-radius:14px;padding:.9rem 1.05rem;box-shadow:var(--shadow-xs);color:var(--ink);transition:transform .18s,box-shadow .18s,border-color .18s}
.weekcard:hover{color:var(--ink);transform:translateY(-3px);box-shadow:var(--shadow);border-color:#d7dbf0}
.weekcard .wk{font-size:.7rem;font-weight:800;color:var(--accent-ink);letter-spacing:.08em;text-transform:uppercase}
.weekcard .ti{font-weight:600;font-size:.95rem}
.weekcard .go{font-size:.78rem;font-weight:700;color:var(--primary);opacity:0;transform:translateX(-4px);transition:all .18s}
.weekcard:hover .go{opacity:1;transform:none}
.weekcard.soon{opacity:.65;cursor:default}
.weekcard.soon:hover{transform:none;box-shadow:var(--shadow-xs);border-color:var(--line)}
.weekcard .badge-soon{font-size:.72rem;color:var(--muted);font-weight:600}

/* ---------- Lesson ---------- */
.lesson-head{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:radial-gradient(700px 320px at 92% -30%,rgba(20,184,166,.16),transparent 60%),linear-gradient(180deg,#fff,var(--bg))}
.lesson-head .blob-1{top:18%;right:10%;width:90px;height:90px;border-radius:26px;background:linear-gradient(135deg,var(--primary-2),var(--accent));opacity:.12;animation-duration:6s}
.lesson-inner{position:relative;max-width:var(--maxw);margin:0 auto;padding:clamp(2rem,5vw,3rem) 1.25rem 2rem}
.crumb{font-size:.82rem;color:var(--muted);font-weight:700}
.lesson-head h1{font-size:clamp(2rem,4.6vw,2.8rem);margin:.7rem 0 .45rem}
.lesson-head .sub{color:var(--muted);max-width:60ch;margin:0}
.outcomes{position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:18px;padding:1.2rem 1.4rem;margin:1.5rem 0;box-shadow:var(--shadow)}
.outcomes::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:linear-gradient(180deg,var(--accent),var(--primary))}
.outcomes h4{margin:0 0 .6rem;font-size:.76rem;text-transform:uppercase;letter-spacing:.12em;color:var(--accent-ink);font-family:var(--font);font-weight:800}
.outcomes ul{margin:0;padding-left:1.15rem}
.outcomes li{margin:.32rem 0}
.tabs{display:inline-flex;gap:.35rem;padding:.35rem;background:var(--primary-wash);border:1px solid var(--line-2);border-radius:15px;flex-wrap:wrap}
.tab-btn{font-family:var(--font);font-weight:700;font-size:.88rem;padding:.55rem 1rem;border-radius:11px;border:1px solid transparent;background:transparent;color:var(--muted);cursor:pointer;transition:all .18s}
.tab-btn.active{border-color:var(--line-2);background:#fff;color:var(--primary-ink);box-shadow:var(--shadow-xs)}

.content{max-width:770px;margin:0 auto;padding:2.4rem 1.25rem 1rem}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:fadeUp .3s ease}
.content h2{font-size:clamp(1.35rem,2.4vw,1.65rem);margin:2.2rem 0 .8rem}
.content h2:first-child{margin-top:.4rem}
.content p{margin:.75rem 0}
.content ul,.content ol{margin:.7rem 0;padding-left:1.3rem}
.content li{margin:.35rem 0}

/* tables */
.content table.data{width:100%;border-collapse:separate;border-spacing:0;margin:1.2rem 0;font-size:.93rem;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.content table.data th{padding:.65rem .8rem;text-align:left;background:var(--primary-wash);color:var(--primary-ink)}
.content table.data td{padding:.65rem .8rem;border-top:1px solid #f0f2f9}

/* callouts */
.callout{position:relative;border-radius:15px;padding:1.05rem 1.2rem 1.05rem 1.35rem;margin:1.4rem 0}
.callout::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;border-radius:5px 0 0 5px}
.callout .lbl{font-weight:800;font-size:.72rem;text-transform:uppercase;letter-spacing:.09em;display:block;margin-bottom:.35rem}
.callout p{margin:0}
.callout p+ul,.callout p+p{margin-top:.5rem}
.callout.key{background:var(--primary-wash);border:1px solid var(--primary-wash-line)}
.callout.key::before{background:var(--primary)} .callout.key .lbl{color:var(--primary-ink)}
.callout.eg{background:var(--accent-wash);border:1px solid var(--accent-wash-line)}
.callout.eg::before{background:var(--accent-2)} .callout.eg .lbl{color:var(--accent-ink)}
.callout.warn{background:var(--rose-wash);border:1px solid var(--rose-wash-line)}
.callout.warn::before{background:var(--rose)} .callout.warn .lbl{color:var(--rose-ink)}
.callout.try{background:var(--warn-wash);border:1px solid var(--warn-wash-line)}
.callout.try::before{background:var(--warn)} .callout.try .lbl{color:var(--warn-ink)}

/* interactive demo */
.demo{position:relative;background:linear-gradient(#fff,#fff) padding-box,linear-gradient(120deg,var(--primary),var(--accent)) border-box;border:1.5px solid transparent;border-radius:18px;padding:1.5rem;margin:1.6rem 0;box-shadow:var(--shadow-md)}
.demo h4{margin:0 0 .35rem;font-size:1.1rem}
.demo .q{font-weight:700;color:var(--primary-ink);margin:.3rem 0}
.demo .scroll{overflow-x:auto}
.demo table.month{border-collapse:collapse;font-size:.85rem;margin:.6rem 0;width:100%;min-width:520px}
.demo table.month th{padding:.45rem .5rem;background:var(--primary-wash);color:var(--primary-ink);text-align:center}
.demo table.month th:first-child{text-align:left;border-radius:8px 0 0 0}
.demo table.month th:last-child{border-radius:0 8px 0 0}
.demo table.month td{padding:.45rem .5rem;text-align:center}
.demo table.month td:first-child{color:var(--muted);text-align:left}
.demo .hint{font-size:.88rem;color:var(--muted);margin:.5rem 0}
.reveal-btn{margin-top:.4rem}
.chartbox{margin-top:1.1rem;padding:1.1rem 1rem .6rem;background:#f9fafe;border:1px solid var(--line);border-radius:14px;animation:pop .4s ease}
.chartbox .cap{margin:0 0 .9rem;font-weight:600;font-size:.9rem;color:var(--ink-2)}
.bars{display:flex;align-items:flex-end;gap:.4rem;height:210px}
.bar{flex:1;display:flex;flex-direction:column;align-items:center;gap:.35rem;height:100%;justify-content:flex-end}
.bar i{width:100%;max-width:34px;border-radius:7px 7px 0 0;background:#c7cbf2;transform-origin:bottom;animation:grow .5s ease both}
.bar span{font-size:.66rem;color:var(--muted)}
.bar b{font-size:.7rem;font-weight:800;color:var(--ink-2);line-height:1;margin-bottom:2px}
.bar.top b{color:var(--accent-ink)}
.bar.top i{background:linear-gradient(180deg,var(--accent),var(--accent-2));box-shadow:0 6px 14px rgba(13,148,136,.35)}
.bar.top span{font-weight:800;color:var(--accent-ink)}

/* terms + quiz */
.terms{display:flex;flex-wrap:wrap;gap:.5rem;margin:1rem 0}
.terms span{background:var(--primary-wash);color:var(--primary-ink);border:1px solid var(--primary-wash-line);border-radius:999px;padding:.35rem .9rem;font-size:.82rem;font-weight:600}
.quiz{background:#fff;border:1px solid var(--line);border-radius:20px;padding:1.6rem;margin:1.6rem 0;box-shadow:var(--shadow)}
.quiz h3{margin:0 0 1rem;font-size:1.2rem}
.q-item{margin-bottom:1.4rem}
.q-item p{font-weight:650;margin:.2rem 0 .6rem}
.opt{display:block;width:100%;text-align:left;background:#fff;border:1px solid var(--line-2);border-radius:11px;padding:.6rem .85rem;margin:.35rem 0;cursor:pointer;font-size:.92rem;font-family:var(--font);transition:all .15s}
.opt:hover{border-color:var(--primary-2)}
.opt.correct{background:var(--accent-wash);border-color:var(--accent);color:var(--accent-ink);font-weight:600}
.opt.wrong{background:var(--rose-wash);border-color:var(--rose);color:var(--rose-ink)}
.q-fb{font-size:.86rem;margin-top:.4rem;min-height:1.1rem;font-weight:600}

.pager{display:flex;justify-content:space-between;gap:1rem;margin:2.6rem 0 1rem;flex-wrap:wrap}
.pager a,.pager button{background:#fff;border:1px solid var(--line-2);border-radius:14px;padding:.85rem 1.2rem;box-shadow:var(--shadow-xs);font-weight:700;color:var(--ink);cursor:pointer;font-family:var(--font);font-size:.95rem;transition:transform .15s,border-color .15s}
.pager a:hover,.pager button:hover{color:var(--ink);transform:translateY(-2px);border-color:#cfd4ee}

/* lab steps (Weeks 5+ tool tutorials) */
.steps{counter-reset:step;list-style:none;padding:0;margin:1.2rem 0}
.steps>li{position:relative;padding:.1rem 0 1.1rem 3rem;margin:0}
.steps>li::before{counter-increment:step;content:counter(step);position:absolute;left:0;top:-2px;width:2rem;height:2rem;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:800;font-size:.9rem;display:grid;place-items:center}
.steps>li:not(:last-child)::after{content:"";position:absolute;left:1rem;top:2rem;bottom:0;width:2px;background:var(--line)}
.steps>li strong{color:var(--ink-2)}
.fx{font-family:'Courier New',monospace;background:var(--primary-wash);color:var(--primary-ink);padding:.12rem .45rem;border-radius:6px;font-size:.86rem;border:1px solid var(--primary-wash-line)}
.path{font-weight:700;color:var(--accent-ink);white-space:nowrap}
.tip{background:var(--warn-wash);border:1px solid var(--warn-wash-line);border-radius:10px;padding:.6rem .85rem;margin:.7rem 0;font-size:.9rem}
.tip b{color:var(--warn-ink)}

/* inline figures (every discussion shows the graph) */
.fig{border:1px solid var(--line);border-radius:14px;padding:1.1rem;margin:1.4rem 0;background:var(--surface);box-shadow:var(--shadow-xs)}
.fig .figtitle{font-weight:700;font-size:.74rem;color:var(--primary-ink);text-transform:uppercase;letter-spacing:.06em;margin-bottom:.7rem}
.fig .figcap{font-size:.82rem;color:var(--muted);margin-top:.7rem;text-align:center;line-height:1.45}
.fig svg{display:block;width:100%;height:auto}
.three{display:grid;grid-template-columns:1fr 1fr 1fr;gap:.8rem;align-items:stretch}
.three .panel{border:1px solid var(--line);border-radius:12px;padding:.8rem;background:#fbfcff;display:flex;flex-direction:column}
.three .plabel{font-size:.7rem;font-weight:800;text-transform:uppercase;letter-spacing:.05em;color:var(--accent-ink);margin-bottom:.5rem}
.three .big{font-size:1.05rem;font-weight:600;color:var(--ink);line-height:1.4}
.three table{width:100%;border-collapse:collapse;font-size:.8rem}
.three td,.three th{padding:.2rem .3rem;border-bottom:1px solid var(--line-soft);text-align:left}
.three th{color:var(--primary-ink)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:.9rem}
.two .panel{border:1px solid var(--line);border-radius:12px;padding:.85rem;background:#fbfcff}
.two .panel.bad{border-color:var(--rose-wash-line);background:var(--rose-wash)}
.two .panel.good{border-color:var(--accent-wash-line);background:var(--accent-wash)}
.two .tag{font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.5rem}
.two .panel.bad .tag{color:var(--rose-ink)}
.two .panel.good .tag{color:var(--accent-ink)}
@media(max-width:700px){.three{grid-template-columns:1fr}.two{grid-template-columns:1fr}}

/* gantt figure */
.gantt{font-size:.78rem}
.gantt .ghead{display:flex;margin-left:118px;color:var(--muted);font-weight:700;font-size:.62rem;margin-bottom:.3rem}
.gantt .ghead span{flex:1;text-align:center}
.gtask{display:flex;align-items:center;margin:.32rem 0}
.gtask .glabel{width:118px;flex:none;color:var(--ink);font-weight:600;font-size:.72rem}
.gtrack{position:relative;flex:1;height:16px;background:#eef1f8;border-radius:5px}
.gbar{position:absolute;top:0;height:16px;border-radius:5px;background:linear-gradient(90deg,var(--primary),var(--accent))}
.gbar.hl{background:linear-gradient(90deg,var(--warn),#ff7a59)}

/* histogram (touching bars) */
.hist{display:flex;align-items:flex-end;gap:2px;height:150px}
.hist .hb{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%}
.hist .hb i{width:100%;background:#6366f1;border-radius:3px 3px 0 0}
.hist .hb b{font-size:.66rem;font-weight:800;color:var(--ink-2);margin-bottom:2px}
.hist .hb span{font-size:.6rem;color:var(--muted);margin-top:3px;text-align:center}

/* choropleth grid */
.choro{display:grid;grid-template-columns:repeat(4,1fr);gap:.4rem}
.choro .st{border-radius:8px;padding:.55rem .3rem;text-align:center;color:#fff;font-weight:700;font-size:.72rem;line-height:1.2}
.choro .st small{display:block;font-weight:600;font-size:.62rem;opacity:.92}
.choro-legend{display:flex;align-items:center;gap:.4rem;justify-content:center;margin-top:.6rem;font-size:.72rem;color:var(--muted)}
.choro-legend i{width:70px;height:10px;border-radius:3px;background:linear-gradient(90deg,#e3f7f4,#0d9488)}

/* mini bar panels (bar family) */
.barmini{display:flex;align-items:flex-end;gap:4px;height:78px;padding-top:6px}
.barmini .col{flex:1;display:flex;align-items:flex-end;gap:2px;height:100%}
.barmini i{flex:1;border-radius:3px 3px 0 0}
.hbars{display:flex;flex-direction:column;gap:5px;justify-content:center;height:78px}
.hbars .hrow{display:flex;align-items:center;gap:5px}
.hbars .hrow i{height:11px;border-radius:0 4px 4px 0}
.hbars .hrow span{font-size:.6rem;color:var(--muted);width:24px;flex:none}

/* glossary (deepened notes) */
.gloss{margin:1rem 0;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-xs)}
.gloss dl{margin:0}
.gloss .row{display:grid;grid-template-columns:230px 1fr;gap:1rem;padding:.7rem 1rem;border-top:1px solid var(--line-soft)}
.gloss .row:first-child{border-top:none}
.gloss dt{font-weight:700;color:var(--primary-ink)}
.gloss dd{margin:0;color:var(--ink)}
@media(max-width:640px){.gloss .row{grid-template-columns:1fr;gap:.2rem}}

/* chapter-2 demo visuals */
.cmp{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:1.3rem;align-items:center;margin-top:1rem}
.pie{width:180px;height:180px;border-radius:50%;margin:0 auto;box-shadow:var(--shadow)}
.legend{list-style:none;margin:.4rem 0 0;padding:0;font-size:.85rem}
.legend li{display:flex;align-items:center;gap:.5rem;margin:.28rem 0;color:var(--ink)}
.legend i{width:14px;height:14px;border-radius:4px;display:inline-block;flex:none}
table.heat{border-collapse:separate;border-spacing:3px;width:100%;font-size:.85rem;margin:.4rem 0}
table.heat th{padding:.4rem .5rem;color:var(--primary-ink);text-align:center}
table.heat td{padding:.45rem .5rem;text-align:center;border-radius:6px;background:#eef1f8}
table.heat td.h{color:#fff;font-weight:700}
table.heat td.label{background:none;color:var(--muted);text-align:left;font-weight:600}
.demo .cap-b{margin:.2rem 0 .6rem;font-weight:700;color:var(--ink-2);font-size:.92rem}

/* downloads bar (per-session materials) */
.downloads{display:flex;align-items:center;flex-wrap:wrap;gap:.6rem;margin:1.4rem 0 .2rem}
.dl-label{font-weight:700;font-size:.85rem;color:var(--muted);margin-right:.2rem}
.dl-btn{display:inline-flex;align-items:center;gap:.5rem;font-weight:700;font-size:.9rem;padding:.6rem 1rem;border-radius:12px;background:#fff;border:1px solid var(--line-2);color:var(--ink);box-shadow:var(--shadow-xs);transition:transform .15s,border-color .15s,box-shadow .15s}
.dl-btn:hover{color:var(--ink);transform:translateY(-2px);border-color:#cfd4ee;box-shadow:var(--shadow)}
.dl-btn.pdf{border-color:var(--rose-wash-line);background:var(--rose-wash);color:var(--rose-ink)}
.dl-btn.ppt{border-color:var(--warn-wash-line);background:var(--warn-wash);color:var(--warn-ink)}
.dl-btn.soon{opacity:.55;cursor:not-allowed}
.dl-btn.soon:hover{transform:none;box-shadow:var(--shadow-xs)}

/* footer */
.footer{background:#0c1223;color:#b9c0d4;margin-top:3rem;border-top:1px solid #1a2340}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:2.4rem 1.25rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;align-items:center}
.footer strong{color:#fff;font-family:var(--display);font-weight:600}
.footer a{color:#fff;font-weight:600}
.footer small{color:#7f89a4}
.footer .right{text-align:right}

/* ---------- Responsive ---------- */
@media(max-width:900px){.cols-2{grid-template-columns:1fr;gap:1.4rem}}
@media(max-width:820px){
  .cols-4{grid-template-columns:repeat(2,1fr)}
  .cols-3{grid-template-columns:1fr}
  .weeks{grid-template-columns:1fr}
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;left:0;right:0;top:100%;flex-direction:column;gap:.35rem;padding:.6rem 1.25rem 1rem;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{width:100%}
  .nav{position:sticky}
  .nav-inner{position:relative}
}
@media(max-width:520px){.cols-4{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{animation-duration:.001ms!important;transition-duration:.001ms!important}}

/* ---------- Assessment pages: rubric self-assessment calculator ---------- */
.calc table.data input[type=number]{width:5.2rem;padding:.4rem .55rem;border:1px solid var(--line-2);border-radius:10px;font-family:var(--font);font-size:.95rem;font-weight:700;color:var(--ink);background:#fff;text-align:center}
.calc table.data input[type=number]:focus{outline:none;border-color:var(--primary-2);box-shadow:0 0 0 3px var(--primary-wash)}
.calc table.data .mk{font-weight:800;color:var(--primary-ink);text-align:right;white-space:nowrap}
.calc-out{margin-top:1rem;padding:.9rem 1.1rem;border-radius:14px;background:var(--accent-wash);border:1px solid var(--accent-wash-line);color:var(--accent-ink);font-weight:600;font-size:.95rem}
.calc-out strong{font-family:var(--display);font-size:1.25rem;font-weight:700}

/* assessment cards that link somewhere */
a.assess-card{display:block;color:var(--ink)}
a.assess-card:hover{color:var(--ink)}
a.assess-card .open{margin-top:.7rem;display:block;font-size:.78rem;font-weight:800;color:var(--primary-ink)}

/* chip used inline inside a heading */
h2 .chip{vertical-align:middle;margin-left:.4rem}

/* ---------- Lecturer profile ---------- */
.lecturer{display:flex;gap:1.2rem;align-items:flex-start;flex-wrap:wrap}
.lecturer .portrait{flex:0 0 132px;width:132px;height:160px;border-radius:16px;object-fit:cover;object-position:center top;border:1px solid var(--line);box-shadow:var(--shadow);background:var(--primary-wash)}
.lecturer .who{flex:1 1 220px;min-width:200px}
.lecturer .who h3{margin:0 0 .2rem}
.lecturer .role{color:var(--muted);font-size:.88rem;line-height:1.6;margin:0 0 .8rem}
@media(max-width:520px){.lecturer{gap:1rem}.lecturer .portrait{flex-basis:104px;width:104px;height:128px}}

/* ---------- Visitor counter ---------- */
.footer .visitors{max-width:var(--maxw);margin:0 auto;padding:0 1.25rem 1.8rem;font-size:.78rem;color:#7f89a4;letter-spacing:.02em}
.footer .visitors span{color:#b9c0d4;font-weight:700}