/* Course app and lesson styles (the public sample lesson uses the lesson parts too). */
body{background:var(--paper)}
.top-bar{display:none}
.layout{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:100vh}
.side{background:var(--navy);color:#DCE2EE;position:sticky;top:0;height:100vh;overflow-y:auto;font-size:15px}
.side a{color:#E8ECF4;text-decoration:none}
.side-top{padding:20px 18px 14px;border-bottom:1px solid rgba(255,255,255,.12)}
.side-brand img{display:block;width:190px;height:auto;margin-bottom:12px}
.side-course{font:400 19px var(--serif);color:#fff;margin-bottom:12px}
.side-bonus{margin-top:10px;font-size:13.5px;color:#F6D9D2;display:flex;align-items:center;gap:6px}
.side-bonus .ico{width:16px;height:16px}
.side-nav ul{list-style:none;margin:0;padding:6px 0}
.part-head{font:700 11.5px var(--sans);letter-spacing:.1em;text-transform:uppercase;color:#AFC0DD;padding:14px 18px 4px}
.side-nav a{display:flex;gap:10px;align-items:flex-start;padding:8px 18px;line-height:1.35;min-height:40px}
.side-nav a:hover{background:rgba(255,255,255,.07)}
.side-nav a[aria-current=page]{background:rgba(255,255,255,.12);box-shadow:inset 4px 0 0 var(--tag)}
.side-nav a:focus-visible{outline:3px solid #fff;outline-offset:-3px}
.side-nav .ico{width:18px;height:18px;flex:0 0 18px;margin-top:1px}
.side-mod>a .mn{flex:0 0 24px;height:24px;border-radius:50%;border:1.5px solid #8FA3C6;display:inline-flex;align-items:center;justify-content:center;font:700 12px var(--sans)}
.side-mod>a .mn.done{background:var(--success);border-color:var(--success)}
.side-mod>a .mn .ico{width:14px;height:14px;margin:0}
.side .tag-label{font-size:10px;padding:.3em .55em .3em .7em;vertical-align:1px}
.side-lessons{padding:0 0 6px!important}
.side-lessons a{padding:6px 18px 6px 52px;font-size:14px;color:#D3DAE8;min-height:34px}
.side-lessons .dot{flex:0 0 10px;width:10px;height:10px;border-radius:50%;border:1.5px solid #8FA3C6;margin-top:5px}
.side-lessons a.done .dot{background:var(--success);border-color:var(--success)}
.side-item a.done{color:#BFE3CF}
.side-foot{padding:16px 18px 24px;font-size:13.5px;color:#C2CDE0;border-top:1px solid rgba(255,255,255,.12)}
.side-foot a{color:#fff;text-decoration:underline}
.page{padding:34px clamp(18px,4vw,56px) 80px;max-width:980px;width:100%}
.page:focus{outline:none}
.page h1{font-size:clamp(30px,4vw,42px);margin:4px 0 8px}
.page h1:focus{outline:none}
.loading{color:var(--muted)}
.overlay{display:none}
@media (max-width:900px){
  .top-bar{display:flex;align-items:center;gap:12px;position:sticky;top:0;z-index:30;background:var(--paper);border-bottom:1px solid var(--line);padding:8px 14px}
  .top-brand img{height:38px;width:auto;display:block}
  .nav-toggle{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 12px;border:2px solid var(--line);border-radius:8px;background:#fff;color:var(--navy);font:600 15px var(--sans);cursor:pointer}
  .layout{grid-template-columns:minmax(0,1fr)}
  .side{position:fixed;left:0;top:0;bottom:0;width:min(320px,86vw);z-index:50;transform:translateX(-100%);transition:transform .2s;visibility:hidden}
  .side.open{transform:none;visibility:visible}
  .overlay{position:fixed;inset:0;background:rgba(17,24,39,.45);z-index:40}
  .overlay.show{display:block}
  .page{padding-top:22px}
}

/* progress: a rail with a price tag that slides along it */
.prog{margin:4px 0 2px;padding-top:26px}
.prog-rail{position:relative;height:8px;border-radius:4px;background:rgba(255,255,255,.18)}
.home-hero .prog-rail,.page .prog-rail{background:var(--stone);border:1px solid var(--line)}
.prog-fill{position:absolute;left:0;top:0;bottom:0;border-radius:4px;background:var(--tag)}
.prog-tag{position:absolute;top:-28px;transform:translateX(-50%);white-space:nowrap}
.prog-tag span{display:inline-block;background:#fff;color:var(--navy);font:700 12px var(--sans);padding:3px 8px 3px 12px;border-radius:3px 6px 6px 3px;clip-path:polygon(6px 0,100% 0,100% 100%,6px 100%,0 50%)}
.page .prog-tag span{background:var(--navy);color:#fff}
.home-hero{padding:6px 0 14px}
.home-hero .lede{font-size:18.5px;max-width:44em}
.home-hero .cta-row{display:grid;grid-template-columns:auto minmax(180px,320px);gap:20px;align-items:center;margin-top:18px}
@media (max-width:640px){.home-hero .cta-row{grid-template-columns:1fr}}
.bonus-note{display:flex;gap:12px;align-items:flex-start;background:var(--tag-50);border:1px solid #EFC5BB;border-radius:var(--r);padding:14px 16px;margin:18px 0}
.bonus-note>.ico{width:22px;height:22px;color:var(--tag);flex:0 0 22px;margin-top:2px}
.part-title{font-size:26px;margin:0 0 14px;display:flex;flex-wrap:wrap;align-items:baseline;gap:10px}
.part-title .n{font:700 12.5px var(--sans);letter-spacing:.1em;text-transform:uppercase;color:var(--tag)}
.mod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.mod-card{display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);transition:transform .15s}
.mod-card:hover{transform:translateY(-2px);color:var(--ink)}
.mc-art{height:96px;background:var(--stone)}.mc-art svg{width:100%;height:100%;display:block}
.mc-body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:4px;flex:1}
.mc-body .mn{font:700 12px var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.mc-body h3{font-size:20px;margin:0}
.mc-body p{margin:0;font-size:15px;color:var(--muted);flex:1}
.mc-body .st{margin-top:8px;font-size:14px;font-weight:600;color:var(--navy)}
.mc-body .st.done{color:var(--success)}
.mc-body .st .ico{width:16px;height:16px}

/* lessons */
.crumb{font-size:14px;color:var(--muted)}
.crumb a{color:var(--muted)}
.lesson-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:var(--muted);font-size:15px;margin-bottom:18px}
.lesson-meta .ico{width:16px;height:16px}
.lesson-art{border-radius:var(--r);overflow:hidden;margin:6px 0 22px;border:1px solid var(--line)}
.lesson-art svg{display:block;width:100%;height:auto}
.lede{font-size:18.5px}
.note{color:var(--muted);font-size:15px}
.content{font-size:17.5px}
.content h3{font-size:25px;margin:1.6em 0 .4em}
.content h4{font-size:18px;margin:1.3em 0 .3em}
.content p,.content li{max-width:44em}
.content ul,.content ol{padding-left:1.3em}
.content li{margin:.3em 0}
.content table{position:relative;border-collapse:collapse;width:100%;margin:14px 0;font-size:15.5px;background:#fff;display:block;overflow-x:auto}
.content th,.content td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.content th{background:var(--stone);color:var(--navy)}
.num-r{text-align:right!important;font-variant-numeric:tabular-nums}
.callout{background:#fff;border:1px solid var(--line);border-left:6px solid var(--navy);border-radius:var(--r);padding:12px 16px;margin:18px 0}
.callout p{margin:.4em 0}
.co-t{font:700 13px var(--sans);letter-spacing:.07em;text-transform:uppercase;color:var(--navy);margin-bottom:4px}
.callout.example{border-left-color:var(--brass);background:#FFFDF8}.callout.example .co-t{color:var(--brass)}
.callout.warn{border-left-color:var(--tag);background:var(--tag-50)}.callout.warn .co-t{color:var(--tag-600)}
.callout.tip{border-left-color:var(--success);background:var(--success-50)}.callout.tip .co-t{color:var(--success)}
.callout.formula{border-left-color:var(--navy);background:var(--navy-50)}
.callout.formula code{background:#fff}
.case-meta{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin:0 0 18px}
.case-meta .cm{background:var(--stone);border-radius:var(--r);padding:10px 12px;font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-weight:600}
.case-meta .cm b{display:block;font:400 18px var(--serif);color:var(--navy);text-transform:none;letter-spacing:0}
.sources{margin:28px 0 10px;font-size:14.5px;color:var(--muted)}
.sources h2{font-size:20px}
.sources li{margin:4px 0;word-break:break-word}
.takeaways{background:var(--navy);color:#E6EAF2;border-radius:var(--r);padding:18px 22px;margin:28px 0}
.takeaways h2{color:#fff;font-size:22px;margin:0 0 6px;display:flex;align-items:center;gap:8px}
.takeaways h2 .ico{width:22px;height:22px;color:#F3B7A9}
.takeaways li{margin:6px 0}
.quick-check{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px 20px;margin:20px 0}
.quick-check h2{font-size:22px;margin:0 0 4px;display:flex;align-items:center;gap:8px}
.quick-check h2 .ico{width:22px;height:22px;color:var(--tag)}
.pager{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:34px 0 0;padding-top:20px;border-top:1px solid var(--line)}
.pager .ico.flip{transform:scaleX(-1)}
.btn .ico{width:18px;height:18px}
.lock-note{background:var(--warn-50);border:1px solid #E8CF97;border-radius:var(--r);padding:12px 16px;margin:14px 0;color:#4D3300}
.lock-note .ico{width:18px;height:18px}
.lesson-list{list-style:none;padding:0;margin:20px 0;counter-reset:l}
.lesson-list li{counter-increment:l;border-bottom:1px dashed var(--line)}
.lesson-list a{display:flex;justify-content:space-between;gap:12px;padding:12px 4px;text-decoration:none;color:var(--ink);min-height:48px;align-items:center}
.lesson-list a::before{content:counter(l);flex:0 0 28px;height:28px;border-radius:50%;background:var(--stone);display:inline-flex;align-items:center;justify-content:center;font:700 13px var(--sans);color:var(--navy)}
.lesson-list li.done a::before{background:var(--success);color:#fff}
.lesson-list .ll-t{flex:1;font-weight:600;color:var(--navy)}
.lesson-list .ll-m{color:var(--muted);font-size:14px;white-space:nowrap;display:flex;gap:6px;align-items:center}
.ok-ico{width:18px;height:18px;color:var(--success)}

/* questions */
.q-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;margin:14px 0;min-width:0}
.q-card legend{display:contents}
.q-no{display:block;font:700 12px var(--sans);letter-spacing:.07em;text-transform:uppercase;color:var(--muted)}
.q-text{display:block;font-weight:600;color:var(--ink);margin:4px 0 10px;font-size:17px}
.opt{display:flex;gap:12px;align-items:flex-start;padding:10px 12px;border:1.5px solid var(--line);border-radius:var(--r);margin:8px 0;cursor:pointer;text-transform:none;letter-spacing:0;font:400 16px var(--sans);color:var(--ink)}
.opt input{width:20px;height:20px;min-height:0;margin:2px 0 0;flex:0 0 auto;accent-color:var(--navy)}
.opt.sel{border-color:var(--navy);background:var(--navy-50)}
.opt.correct{border-color:var(--success);background:var(--success-50)}
.opt.wrong{border-color:var(--danger);background:var(--danger-50)}
.opt:focus-within{box-shadow:0 0 0 3px var(--navy-50)}
.expl{display:none;margin-top:8px;font-size:15.5px;color:var(--ink);background:var(--stone);border-radius:8px;padding:10px 12px}
.expl.show{display:block}
.score-banner{border-radius:var(--r);padding:18px 20px;margin:10px 0 20px}
.score-banner h2{margin:0 0 4px;font-size:26px}
.score-banner.pass{background:var(--success-50);border:1px solid #A8D0BC}.score-banner.pass h2{color:var(--success)}
.score-banner.fail{background:var(--warn-50);border:1px solid #E8CF97}.score-banner.fail h2{color:var(--warn)}
.score-inline{margin:8px 0}

/* version-1 widgets */
.tryit,.scenario{background:#fff;border:1px solid var(--line);border-radius:var(--r);margin:20px 0;overflow:hidden}
.ti-head,.sc-head{background:var(--navy);color:#fff;font:700 14px var(--sans);letter-spacing:.04em;padding:10px 16px}
.tryit.practice .ti-head{background:var(--brass)}
.ti-body,.sc-body{padding:14px 16px}
.ti-note{font-size:14px;color:var(--muted)}
.calc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:10px;margin:8px 0}
.calc-grid label{margin:0 0 4px;font-size:12px}
.calc-grid input,.text-input,.num-in{min-height:44px;border:2px solid var(--line);border-radius:8px;padding:8px 10px;font:16px var(--sans);width:100%;background:#fff;color:var(--ink)}
.num-in{width:96px;text-align:right}
.calc-out{display:flex;flex-wrap:wrap;gap:10px;margin:10px 0}
.calc-out .co{background:var(--stone);border-radius:8px;padding:8px 12px;min-width:130px}
.calc-out .co.hi{background:var(--navy-50)}
.calc-out .k{font:700 11.5px var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.calc-out .v{font:600 20px var(--sans);color:var(--navy)}
.slider-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:8px 0}
.slider-row input[type=range]{flex:1 1 200px}
.pr-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:10px 0}
.pr-row .text-input{max-width:170px}
.pr-row .unit{color:var(--muted);font-weight:600}
.pr-feedback{margin-top:6px;border-radius:8px;font-size:15.5px}
.pr-feedback:empty{display:none}
.pr-feedback.ok{background:var(--success-50);color:#174F35;padding:10px 12px}
.pr-feedback.bad{background:var(--danger-50);color:#7A1B15;padding:10px 12px}
.pr-feedback.sol{background:var(--navy-50);color:var(--navy);padding:10px 12px}
.sc-opts{display:grid;gap:8px;margin:10px 0}
.sc-opts button,.rp-choice{text-align:left;min-height:48px;padding:10px 14px;border:1.5px solid var(--line);border-radius:var(--r);background:#fff;font:500 16px var(--sans);color:var(--ink);cursor:pointer}
.sc-opts button:hover,.rp-choice:hover{border-color:var(--navy)}
.picked-best,.rp-choice.best{border-color:var(--success)!important;background:var(--success-50)!important}
.picked-ok,.rp-choice.ok{border-color:var(--warn)!important;background:var(--warn-50)!important}
.picked-poor,.rp-choice.poor{border-color:var(--danger)!important;background:var(--danger-50)!important}
.sc-fb{border-radius:8px;padding:10px 12px;margin-top:8px;font-size:15.5px}
.sc-fb:empty{display:none}
.sc-fb.best{background:var(--success-50);color:#174F35}.sc-fb.ok{background:var(--warn-50);color:#4D3300}.sc-fb.poor{background:var(--danger-50);color:#7A1B15}
.sc-more{display:block;margin-top:6px;opacity:.85}
.gl-search,.gl-search+.gl-cats{margin:10px 0}
input.gl-search{min-height:46px}
.gl-cats{display:flex;flex-wrap:wrap;gap:8px}
.gl-cats button{min-height:40px;border:1.5px solid var(--line);background:#fff;border-radius:20px;padding:0 14px;font:600 14px var(--sans);color:var(--ink);cursor:pointer}
.gl-cats button.on{background:var(--navy);border-color:var(--navy);color:#fff}
.gl-count{font-size:14px;color:var(--muted);margin:6px 0}
.gl-item{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:12px 14px;margin:8px 0}
.gl-t{font-weight:700;color:var(--navy);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.gl-c{font:600 12px var(--sans);color:var(--muted);background:var(--stone);border-radius:10px;padding:2px 8px}
.gl-d{margin-top:4px}
.code-area{width:100%;font:13px var(--mono);border:2px solid var(--line);border-radius:var(--r);padding:10px;min-height:96px}

/* diagrams */
.fig{margin:22px 0;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px}
.fig-svg{display:block;width:100%;height:auto}
.fig figcaption{font-size:14.5px;color:var(--muted);margin-top:8px}
.fig-ctl{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:10px 0}
.fig-ctl label{margin:0;text-transform:none;letter-spacing:0;font:600 15px var(--sans);color:var(--ink)}
.fig-ctl input[type=range]{flex:1 1 200px;min-height:32px;accent-color:var(--tag);border:0;padding:0}
.fig-ctl select{width:auto;min-width:120px}
.fig-ctl output{font:700 15px var(--sans);color:var(--navy);min-width:48px}
.fig-read{font-size:15px;margin:6px 0 0}
.fig-tabs{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.fig-tabs button{min-height:40px;padding:0 12px;border:1.5px solid var(--line);border-radius:20px;background:#fff;font:600 14px var(--sans);color:var(--ink);cursor:pointer}
.fig-tabs button[aria-selected=true]{background:var(--tag);border-color:var(--tag);color:#fff}
.fig-panel{margin-top:10px;background:var(--stone);border-radius:8px;padding:10px 12px;font-size:15.5px}
.ft{font:500 14px var(--sans);fill:var(--ink)}.fs{font:400 12.5px var(--sans);fill:var(--muted)}.b{font-weight:700}
.light{fill:#fff}.tagc{fill:var(--tag)}.fop{font:700 26px var(--sans);fill:var(--navy)}
.c-navy{fill:var(--navy)}.c-navy700{fill:var(--navy-700)}.c-navy50{fill:var(--navy-50)}.c-tag{fill:var(--tag)}.c-tag50{fill:var(--tag-50)}
.c-stone{fill:var(--stone)}.c-paper{fill:var(--paper)}.c-white{fill:#fff;stroke:var(--line)}.c-line{fill:var(--line)}.c-ink{fill:var(--ink)}
.c-success50{fill:var(--success-50)}.c-brass-soft{fill:#E2CFA6}.c-carton{fill:#D8BE8E;stroke:#A88A55;stroke-width:1.5}
.s-ink{stroke:var(--ink);stroke-width:2}.s-line{stroke:var(--line);stroke-width:2}.s-brass{stroke:var(--brass);stroke-width:2}
.s-navy{stroke:var(--navy);stroke-width:2}.s-tag{stroke:var(--tag);stroke-width:2}.s-paper{stroke:var(--paper)}
.thick{stroke-width:4}.dash{stroke-dasharray:6 5}
.mod-art-svg{display:block;width:100%;height:100%}

/* exercises */
.exw{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);margin:26px 0;box-shadow:var(--shadow);overflow:hidden}
.exw-head{display:flex;gap:12px;align-items:center;background:var(--stone);padding:12px 18px;border-bottom:1px dashed var(--line)}
.exw-head>.ico{width:28px;height:28px;color:var(--tag);flex:0 0 28px}
.exw-kind{font:700 11.5px var(--sans);letter-spacing:.1em;text-transform:uppercase;color:var(--tag)}
.exw-head h3{margin:0;font-size:20px}
.exw-intro{margin:12px 18px 0}
.exw-body{padding:14px 18px 6px}
.exw-foot{padding:0 18px 14px;font-size:14px;color:var(--muted);display:flex;align-items:center;gap:6px}
.exw-foot .ico{width:16px;height:16px;color:var(--success)}
.exw h4{font:400 19px var(--serif);color:var(--navy);margin:18px 0 6px}
.exw label{text-transform:none;letter-spacing:0;font:600 15px var(--sans);color:var(--ink)}
.drill-n{font:700 12px var(--sans);letter-spacing:.07em;text-transform:uppercase;color:var(--muted)}
.chip{display:inline-flex;align-items:center;min-height:44px;padding:8px 14px;margin:4px;border:1.5px solid var(--navy);border-radius:22px;background:#fff;color:var(--navy);font:500 15px var(--sans);cursor:grab;touch-action:none;text-align:left;max-width:100%}
.chip.sel{background:var(--navy);color:#fff;box-shadow:0 0 0 3px var(--navy-50)}
.chip.right{border-color:var(--success);background:var(--success-50);color:#174F35}
.chip.wrong{border-color:var(--danger);background:var(--danger-50);color:#7A1B15}
.pool{min-height:60px;padding:8px;border:2px dashed var(--line);border-radius:var(--r);background:var(--paper);margin:8px 0}
.slots{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px;margin:10px 0}
.slots.match{grid-template-columns:1fr}
.slot{border:1.5px solid var(--line);border-radius:var(--r);background:#fff;min-height:90px}
.slots.match .slot{display:grid;grid-template-columns:minmax(120px,1fr) 2fr;min-height:56px;align-items:center}
.slot-head{display:block;width:100%;text-align:left;background:var(--stone);border:0;border-bottom:1px solid var(--line);padding:10px 12px;font:700 15px var(--sans);color:var(--navy);cursor:pointer;min-height:44px;border-radius:var(--r) var(--r) 0 0}
.slots.match .slot-head{border-bottom:0;border-right:1px solid var(--line);height:100%;border-radius:var(--r) 0 0 var(--r)}
.slot-items{padding:6px;min-height:44px}
.drag-ghost{position:fixed;z-index:200;pointer-events:none;background:var(--navy);color:#fff;padding:8px 14px;border-radius:20px;font:500 15px var(--sans);box-shadow:var(--shadow);max-width:260px}
.order-list{list-style:none;padding:0;margin:10px 0}
.order-item{display:grid;grid-template-columns:32px 1fr auto;gap:10px;align-items:center;background:#fff;border:1.5px solid var(--line);border-radius:var(--r);padding:8px 10px;margin:6px 0;touch-action:none;cursor:grab}
.order-item.right{border-color:var(--success);background:var(--success-50)}.order-item.wrong{border-color:var(--danger);background:var(--danger-50)}
.ord-n{width:28px;height:28px;border-radius:50%;background:var(--stone);display:inline-flex;align-items:center;justify-content:center;font:700 13px var(--sans);color:var(--navy)}
.ord-btns{display:flex;gap:4px}
.why{font-size:15px}
.rp-trail{display:flex;gap:6px;margin-bottom:8px}
.rp-step{width:26px;height:26px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font:700 12px var(--sans);background:var(--stone)}
.rp-step.best{background:var(--success);color:#fff}.rp-step.ok{background:var(--warn);color:#fff}.rp-step.poor{background:var(--danger);color:#fff}
.rp-text{font-size:17px;background:var(--paper);border-left:4px solid var(--brass);padding:10px 14px;border-radius:0 8px 8px 0;margin-bottom:10px;white-space:pre-line}
.rp-choices{display:grid;gap:8px}
.rp-end{background:var(--navy-50);border-radius:8px;padding:10px 12px;margin:10px 0}
.fc-card{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:8px;width:100%;min-height:180px;border:2px solid var(--navy);border-radius:var(--r-lg);background:var(--paper);padding:20px;cursor:pointer;text-align:center;font:inherit;color:var(--ink);position:relative}
.fc-card::before{content:"";position:absolute;top:12px;left:50%;width:12px;height:12px;margin-left:-6px;border-radius:50%;border:2px solid var(--brass)}
.fc-card.flipped{background:#fff;border-color:var(--tag)}
.fc-term{font:400 28px var(--serif);color:var(--navy)}
.fc-hint{font-size:13.5px;color:var(--muted)}
.fc-def{font-size:17px;max-width:36em}
.fc-count{font-size:14px;color:var(--muted);margin-bottom:8px}
.calc-table{border-collapse:collapse;width:100%;font-size:15px;background:#fff}
.calc-table th,.calc-table td{border:1px solid var(--line);padding:7px 9px;text-align:left;vertical-align:middle}
.calc-table thead th{background:var(--stone);color:var(--navy);white-space:nowrap}
.calc-table tr.total th,.calc-table tr.total td{background:var(--navy-50);font-weight:700}
.calc-table .neg,.neg{color:var(--danger);font-weight:700}
.pos{color:var(--success);font-weight:600}
.warn-text{color:var(--warn);font-weight:600}
.table-wrap{position:relative;overflow-x:auto;margin:10px 0;-webkit-overflow-scrolling:touch}
.split-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.task{border-top:1px dashed var(--line);padding-top:8px;margin-top:10px}
.sim-facts{display:flex;flex-wrap:wrap;gap:8px;margin:4px 0 10px}
.sim-facts span{background:var(--stone);border-radius:6px;padding:4px 10px;font-size:14px}
.sim-out{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:10px 0}
.sim-out div{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:8px 10px}
.sim-out span{display:block;font:700 11.5px var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.sim-out b{font:600 22px var(--sans);color:var(--navy)}
.md-strip{display:grid;grid-template-columns:repeat(auto-fill,minmax(52px,1fr));gap:4px;margin:8px 0 12px}
.md-wk{border:1px solid var(--line);border-radius:6px;padding:4px;text-align:center;font-size:12px;background:var(--paper)}
.md-wk span{display:block;color:var(--muted)}.md-wk b{display:block;min-height:16px;color:var(--navy)}
.md-wk.done{background:var(--navy-50)}.md-wk.now{border:2px solid var(--tag)}
.md-choices{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.md-log{margin:10px 0}
.range-t select{min-height:40px;width:auto;padding:4px 8px}
.range-t tr.right td,.range-t tr.right th{background:var(--success-50)}.range-t tr.wrong td,.range-t tr.wrong th{background:var(--danger-50)}
.range-why{font-size:13.5px;margin-top:4px;max-width:28em}
.range-why .ico{width:14px;height:14px;color:var(--success)}
.summary-auto{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:6px 12px}
.summary-auto p{margin:4px 0}
.exw textarea{width:100%;min-height:70px;border:2px solid var(--line);border-radius:8px;padding:8px 10px;font:16px var(--sans)}
.timer{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:12px}
.timer-face{font:600 34px var(--mono);color:var(--navy);text-align:center}
.timer-bar{height:10px;border-radius:5px;background:var(--stone);overflow:hidden;margin:8px 0}
.timer-fill{height:100%;background:var(--success)}.timer-fill.over{background:var(--danger)}
.check-list{list-style:none;padding:0}
.rec{margin:10px 0}.rec summary{cursor:pointer;font-weight:600;color:var(--navy);min-height:40px;padding:8px 0}
.rec audio{width:100%;margin-top:8px}
.sheet-t .rowh{width:36px;text-align:center;color:var(--muted);background:var(--stone)}
.sheet-t .col-letter{display:block;font:600 11px var(--mono);color:var(--muted)}
.sheet-t td.fill{background:#FFFDF2}
.sheet-t td.right{background:var(--success-50)}.sheet-t td.wrong{background:var(--danger-50)}

/* certificate */
.row-btns{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}
.name-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px}
.name-row .text-input{flex:1 1 240px}
.cred-panel{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:16px 20px;margin:16px 0}
.cred-head{display:flex;gap:14px;align-items:flex-start}
.cred-head h2{font-size:22px;margin:0}
.cred-head p{margin:4px 0 0}
.cred-tick{flex:0 0 42px;height:42px;border-radius:50%;background:var(--success);color:#fff;display:inline-flex;align-items:center;justify-content:center}
.cred-tick .ico{width:22px;height:22px}
.cred-tick.wait{background:var(--navy-50);color:var(--navy)}.cred-tick.warn{background:var(--warn-50);color:var(--warn)}
.cred-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px;margin:14px 0}
.cred-grid div{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:8px 12px}
.cred-grid span{display:block;font:700 11.5px var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.btn.li{background:#0A66C2;border-color:#0A66C2}
.btn.li:hover{background:#084E96;border-color:#084E96}
.certificate{position:relative;background:#fff;border:2px solid var(--navy);outline:6px solid var(--paper);outline-offset:-14px;border-radius:6px;padding:48px 40px 40px;text-align:center;margin:20px 0;box-shadow:var(--shadow)}
.c-tag img{width:70px;height:auto}
.c-kicker{font:700 13px var(--sans);letter-spacing:.2em;text-transform:uppercase;color:var(--tag);margin-top:6px}
.c-sub{font:600 12px var(--sans);letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-top:4px}
.c-title{font:400 clamp(28px,4vw,40px) var(--serif);color:var(--navy);margin:14px 0 2px}
.c-small{font-size:15px;color:var(--muted)}
.c-pre{margin-top:22px;font-size:15px;color:var(--muted)}
.c-name{font:400 clamp(30px,5vw,46px) var(--serif);color:var(--ink);border-bottom:2px solid var(--brass);display:inline-block;padding:4px 24px;margin:6px 0 14px}
.c-body{max-width:38em;margin:0 auto;font-size:16px}
.c-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:26px 0 8px;font-size:12.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.c-meta b{display:block;font:600 16px var(--sans);color:var(--ink);text-transform:none;letter-spacing:0;margin-bottom:2px;word-break:break-word}
.c-verify{font-size:12.5px;color:var(--muted);margin-top:14px;word-break:break-all}
.c-verify span{color:var(--navy)}
.c-rail{height:22px;background:var(--rail) repeat-x;opacity:.6;margin-top:18px}
@media (max-width:560px){.certificate{padding:34px 16px 24px}.c-meta{grid-template-columns:1fr}}
.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);background:var(--navy);color:#fff;padding:12px 18px;border-radius:var(--r);z-index:300;box-shadow:var(--shadow);max-width:90vw}
.empty{text-align:center;padding:20px}
.todo{list-style:none;padding:0}.todo li{margin:4px 0}
@media print{
  .side,.top-bar,.no-print,.pager,.toast,.skip{display:none!important}
  .layout{display:block}.page{padding:0;max-width:none}
  body{background:#fff}
  .certificate{box-shadow:none;margin:0;page-break-inside:avoid}
  .page>*:not(#print-cert){display:none}
}
@media (prefers-reduced-motion:reduce){.side{transition:none}}

/* certificate checklist */
.checklist{margin:18px 0}
.ck-head{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px 18px;margin-bottom:12px}
.ck-head h2{margin:0;font-size:22px}
.ck-head p{margin:2px 0 0}
.ck-head .btn{margin-top:12px}
.tickbox{flex:0 0 22px;width:22px;height:22px;border:2px solid var(--muted);border-radius:5px;background:#fff;display:inline-flex;align-items:center;justify-content:center;color:#fff}
.tickbox.on{background:var(--success);border-color:var(--success)}
.tickbox svg{width:16px;height:16px}
.ck-mod{background:#fff;border:1px solid var(--line);border-radius:var(--r);margin:8px 0}
.ck-mod summary{display:flex;align-items:center;gap:10px;padding:12px 14px;cursor:pointer;min-height:48px;list-style:none}
.ck-mod summary::-webkit-details-marker{display:none}
.ck-mod summary::after{content:"";width:8px;height:8px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);margin-left:6px;flex:0 0 8px}
.ck-mod[open] summary::after{transform:rotate(-135deg)}
.ck-title{flex:1;font-weight:600;color:var(--navy)}
.ck-count{font-size:14px;color:var(--muted);white-space:nowrap}
.ck-mod.done .ck-title{color:var(--muted)}
.ck-list{list-style:none;margin:0;padding:0 8px 8px}
.ck-final{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:4px 8px;margin-top:8px}
.ck-item a,.ck-item.locked{display:flex;align-items:center;gap:10px;padding:9px 8px;border-radius:8px;text-decoration:none;color:var(--ink);min-height:44px}
.ck-item a:hover{background:var(--navy-50)}
.ck-item.done a{color:var(--muted)}
.ck-label{flex:1}
.ck-item:not(.done) .ck-label{font-weight:600;color:var(--navy)}
.ck-note{font-size:13.5px;color:var(--muted);white-space:nowrap;display:inline-flex;align-items:center;gap:4px}
.ck-note .ico{width:14px;height:14px}
.ck-go .ico{width:18px;height:18px;color:var(--tag)}
@media (max-width:560px){.ck-note{white-space:normal;text-align:right}}