/* Shared design system for the /color/ module. Same tokens as mixing-ratio-calculator. */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --p:#6D28D9;--pl:#EDE9FE;--pt:#26215C;
  --o:#C2410C;--ol:#FFF7ED;--ot:#7C2D12;
  --g:#15803D;--gl:#DCFCE7;--gt:#14532D;
  --r:#DC2626;--rl:#FEF2F2;--rt:#991B1B;
  --grad:linear-gradient(135deg,#6D28D9 0%,#9333EA 50%,#C2410C 100%);
  --border:#E5E7EB;--bg:#F9FAFB;--card:#fff;--text:#111827;--muted:#6B7280;--hint:#9CA3AF;
}
body{font-family:'Plus Jakarta Sans',system-ui,sans-serif;background:#F3F4F6;color:var(--text);min-height:100vh;padding:2rem 1rem 5rem}
a{color:var(--p)}
.wrap{max-width:820px;margin:0 auto}
h1{font-size:22px;font-weight:600;letter-spacing:-.02em}
h2{font-size:16px;font-weight:600;letter-spacing:-.01em;margin-bottom:.6rem}
.sub{font-size:13px;color:var(--muted);margin-top:3px;margin-bottom:1.5rem}
.crumb{font-size:12px;color:var(--hint);margin-bottom:.6rem}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{color:var(--p)}

/* Tabs (input mode switcher, nav) */
.modes{display:flex;gap:8px;margin-bottom:1.1rem}
.mb{flex:1;padding:10px 14px;border:1.5px solid var(--border);border-radius:10px;background:var(--card);color:var(--muted);font-size:13.5px;font-weight:500;cursor:pointer;font-family:inherit;text-align:left;line-height:1.4;transition:all .13s}
.mb .ms{display:block;font-size:11px;font-weight:400;opacity:.6;margin-top:2px}
.mb.on{border-color:var(--p);background:var(--pl);color:var(--pt)}
.mb:hover:not(.on){background:var(--bg);border-color:#C4B5FD}

/* Cards */
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.1rem 1.25rem;margin-bottom:.8rem}
.card-input{background:var(--pl);border-color:#C4B5FD}
.card-input .lbl{color:var(--pt)}
.card-input input[type=text],.card-input input[type=number],.card-input select{background:#fff}
.card-input summary{color:var(--pt)!important}
.card-hd{display:flex;align-items:center;justify-content:space-between;margin-bottom:.9rem;gap:8px;flex-wrap:wrap}
.lbl{font-size:10.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--hint)}
.bdg{font-size:11px;font-weight:600;padding:3px 10px;border-radius:100px}
.ba{background:var(--pl);color:var(--pt)}
.bb{background:var(--gl);color:var(--gt)}
.bc{background:var(--ol);color:var(--ot)}

/* Form grid */
.gr{display:grid;gap:9px;align-items:end;margin-bottom:9px}
.g2{grid-template-columns:1fr 1fr}
.g3{grid-template-columns:1fr 1fr 1fr}
.g4{grid-template-columns:1fr 1fr 1fr 1fr}
label{display:block;font-size:11px;color:var(--muted);margin-bottom:4px;font-weight:500}
input[type=text],input[type=number],textarea{width:100%;padding:8px 11px;border:1px solid var(--border);border-radius:8px;font-size:13.5px;font-family:inherit;color:var(--text);background:var(--bg);outline:none;transition:border-color .12s,box-shadow .12s}
textarea{resize:vertical;min-height:110px;font-family:'JetBrains Mono',monospace;font-size:12.5px}
input::placeholder,textarea::placeholder{color:#C0C0C0;font-style:italic}
input.ghost-example{color:#C0C0C0;font-style:italic}
input.ghost-example:focus{color:var(--text);font-style:normal}
input:focus,textarea:focus,select:focus{border-color:var(--p);background:#fff;box-shadow:0 0 0 3px rgba(109,40,217,.1)}
select{padding:8px 11px;border:1px solid var(--border);border-radius:8px;font-size:13.5px;font-family:inherit;color:var(--text);background:var(--bg);outline:none;cursor:pointer;width:100%}

/* Buttons */
.badd{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border:1px dashed #C4B5FD;border-radius:8px;background:transparent;color:var(--muted);font-size:13px;cursor:pointer;font-family:inherit;transition:all .13s}
.badd:hover{border-color:var(--p);color:var(--p);background:var(--pl)}
.bcalc{width:100%;padding:13px;border:none;border-radius:10px;font-size:15px;font-weight:600;cursor:pointer;font-family:inherit;letter-spacing:.01em;color:#fff;background:var(--grad);transition:opacity .12s,transform .08s}
.bcalc:hover{opacity:.9}
.bcalc:active{transform:scale(.998)}
.bsave,.bprint,.bghost{padding:8px 16px;border:1px solid var(--border);border-radius:8px;background:var(--card);color:var(--text);font-size:13px;font-weight:500;cursor:pointer;font-family:inherit;transition:all .13s}
.bsave:hover,.bghost:hover{border-color:var(--p);color:var(--pt);background:var(--pl)}
.bprint:hover{background:var(--bg)}
.bswap{width:36px;height:36px;border-radius:50%;border:1px solid var(--border);background:var(--card);color:var(--p);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .13s}
.bswap:hover{background:var(--pl);border-color:var(--p)}

.emsg{background:#FEF2F2;border:1px solid #FECACA;border-radius:8px;padding:9px 13px;font-size:13px;color:#DC2626;margin-bottom:.8rem;display:none}
.emsg.on{display:block}
.warn{background:#FFFBEB;border:1px solid #FDE68A;border-radius:8px;padding:9px 13px;font-size:13px;color:#92400E;margin-bottom:.8rem;display:none;gap:8px;align-items:flex-start}
.warn.on{display:flex}
.warn svg{flex-shrink:0;margin-top:1px}

/* Results */
.rwrap{margin-top:1.25rem}
.rcard{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.1rem 1.25rem;margin-bottom:.8rem}
.rl{font-size:10.5px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--hint);margin-bottom:5px}
.rmain{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.rv{font-family:'JetBrains Mono',monospace;font-size:34px;font-weight:500;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:.03em}
.rformula{font-size:12px;color:var(--muted)}
.badge{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:700;padding:5px 12px;border-radius:100px;letter-spacing:.03em}
.badge-pass{background:var(--gl);color:var(--gt)}
.badge-fail{background:var(--rl);color:var(--rt)}
.rtol{font-size:11.5px;color:var(--hint)}
.formula-row{display:flex;gap:16px;margin-top:10px;flex-wrap:wrap;font-size:12.5px;color:var(--muted)}
.formula-row b{color:var(--text);font-family:'JetBrains Mono',monospace;font-weight:500}
.delta-row{display:flex;gap:0;margin-top:2px}
.delta-row>div{flex:1;text-align:center;padding:8px 4px}
.delta-row .dl{font-size:10px;color:var(--hint);text-transform:uppercase;letter-spacing:.06em;margin-bottom:3px}
.delta-row .dv{font-family:'JetBrains Mono',monospace;font-size:15px;font-weight:500}
.dv.pos{color:var(--ot)}
.dv.neg{color:var(--p)}
.interp{font-size:14px;line-height:1.65;color:var(--text)}
.interp .dim{color:var(--muted)}
.noise-note{font-size:11.5px;color:var(--hint);margin-top:8px}
.nodose{font-size:11.5px;color:var(--hint);margin-top:6px;font-style:italic;border-top:1px dashed var(--border);padding-top:8px}

/* Plots */
.plots{display:grid;grid-template-columns:1fr 90px;gap:10px;align-items:stretch}
.plot-box{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:.8rem}
.plot-box svg{width:100%;height:auto;display:block}
.plot-note{font-size:10.5px;color:var(--hint);text-align:center;margin-top:4px}

/* Tables */
.tbl-wrap{background:var(--card);border:1px solid var(--border);border-radius:12px;overflow:hidden;margin-bottom:.8rem}
.tbl-hd{padding:.8rem 1.25rem;border-bottom:1px solid #F3F4F6;display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.tbl-hd span{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.07em;color:var(--hint)}
table{width:100%;border-collapse:collapse;font-size:13.5px}
thead th{padding:9px 1.1rem;text-align:right;font-size:10.5px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--hint);background:var(--bg);border-bottom:1px solid #F3F4F6}
thead th:first-child{text-align:left}
tbody td{padding:10px 1.1rem;border-bottom:1px solid #F9FAFB;color:var(--text);text-align:right}
tbody td:first-child{text-align:left;font-weight:500}
tbody tr{cursor:pointer}
tbody tr:hover{background:var(--bg)}
tbody tr:last-child td{border-bottom:none}
.mn{font-family:'JetBrains Mono',monospace;font-size:12.5px}

.arow{display:flex;justify-content:flex-end;gap:8px;padding:.875rem 1.25rem;background:var(--card);border:1px solid var(--border);border-radius:12px;margin-bottom:.8rem;flex-wrap:wrap}

/* Master library + history */
.hsec{margin-top:1.75rem}
.hhd{display:flex;align-items:center;justify-content:space-between;margin-bottom:.6rem}
.hhd h3{font-size:14px;font-weight:500;color:var(--muted)}
.bclr{font-size:12px;color:var(--hint);background:none;border:none;cursor:pointer;font-family:inherit;padding:4px 8px;border-radius:6px}
.bclr:hover{color:#DC2626;background:#FEF2F2}
.hi{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:.875rem 1.1rem;margin-bottom:7px}
.hitp{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:4px;flex-wrap:wrap;gap:6px}
.hrat{font-family:'JetBrains Mono',monospace;font-size:15px;font-weight:500}
.hmeta{font-size:11px;color:var(--hint)}
.hdet{font-size:12px;color:var(--muted);line-height:1.6}
.empty-hint{font-size:12.5px;color:var(--hint);padding:1rem;text-align:center}

/* Colour vision hue-arrangement self-test */
.vt-surround{background:#8a8a8a;border-radius:10px;padding:14px;margin:1.2rem 0}
.vt-grid{display:grid;grid-template-columns:repeat(16,1fr);gap:5px;margin:0}
.vt-tile{aspect-ratio:1;border-radius:8px;cursor:grab;border:2.5px solid transparent;transition:transform .1s,border-color .1s,opacity .1s;position:relative;touch-action:none}
.vt-tile.dragging{opacity:.35;cursor:grabbing}
.vt-tile.drop-target{border-color:var(--p);transform:scale(1.08)}
.vt-tile.fixed{cursor:default;border-color:#fff}
.vt-tile.fixed::after{content:'★';position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.5);font-size:13px}
@media(max-width:640px){.vt-grid{grid-template-columns:repeat(8,1fr);gap:6px}}
.vt-legend{font-size:11.5px;color:var(--hint);text-align:center;margin-bottom:.4rem}
.vt-endlabels{display:flex;justify-content:space-between;font-size:10.5px;color:var(--hint);font-family:'JetBrains Mono',monospace;margin-top:4px}
.vt-score-big{font-family:'JetBrains Mono',monospace;font-size:32px;font-weight:600;color:var(--pt)}

/* Glossary search */
.search-wrap{position:relative;margin:1.2rem 0}
.search-input-row{display:flex;align-items:center;gap:10px;background:var(--card);border:1.5px solid var(--border);border-radius:12px;padding:12px 16px;transition:border-color .12s,box-shadow .12s}
.search-input-row:focus-within{border-color:var(--p);box-shadow:0 0 0 3px rgba(109,40,217,.1)}
.search-input-row svg{flex-shrink:0;color:var(--hint)}
.search-input-row input{border:none;background:transparent;padding:0;font-size:14.5px;flex:1}
.search-input-row input:focus{box-shadow:none}
.search-results{margin-top:10px;display:flex;flex-direction:column;gap:8px}
.search-result{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:.85rem 1rem}
.search-result strong{display:block;font-size:13.5px;color:var(--pt);margin-bottom:3px}
.search-result span{font-size:13px;color:var(--muted);line-height:1.55}
.search-empty{font-size:13px;color:var(--hint);padding:.5rem 0}
.search-more{font-size:12.5px;text-align:center;padding-top:2px}

/* Landing cards (color/index, training index) */
.tcards{display:flex;flex-direction:column;gap:12px;margin-top:1.5rem}
.tcard{display:flex;align-items:center;gap:16px;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.1rem 1.25rem;text-decoration:none;color:inherit;transition:all .15s}
.tcard:hover{border-color:var(--p);box-shadow:0 8px 22px rgba(109,40,217,.10);transform:translateY(-1px)}
.tcard-icon{width:44px;height:44px;flex:none;border-radius:10px;background:var(--pl);display:flex;align-items:center;justify-content:center;color:var(--p)}
.tcard-body strong{display:block;font-size:14.5px;font-weight:600}
.tcard-body span{font-size:12.5px;color:var(--muted)}
.progress-bar{height:6px;border-radius:100px;background:var(--border);overflow:hidden;margin-top:6px}
.progress-bar>div{height:100%;background:var(--grad)}

/* Training / intro */
.tsec{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.4rem 1.5rem;margin-bottom:1rem}
.tsec h3{font-size:15.5px;font-weight:600;margin-bottom:.6rem;color:var(--pt)}
.tsec p{font-size:14px;line-height:1.7;color:var(--text);margin-bottom:.7rem}
.tsec p:last-child{margin-bottom:0}
.tsec ul{margin:0 0 .7rem;padding-left:1.15rem}
.tsec ul:last-child{margin-bottom:0}
.tsec li{font-size:14px;line-height:1.55;color:var(--text);margin-bottom:.5rem}
.tsec li::marker{color:var(--p)}
.tsec .callout{background:var(--pl);border-radius:8px;padding:.8rem 1rem;font-size:13px;color:var(--pt);margin-top:.6rem}
.hue-wheel-wrap{display:flex;justify-content:center;margin:1rem 0}
.slider-row{display:flex;align-items:center;gap:10px;margin:.6rem 0}
.slider-row input[type=range]{flex:1;accent-color:var(--p)}
.slider-row output{font-family:'JetBrains Mono',monospace;font-size:13px;width:52px;text-align:right}

/* Carousel (training slides) */
.carousel-dots{display:flex;justify-content:center;gap:9px;margin-bottom:1rem}
.carousel-dot{width:8px;height:8px;border-radius:50%;background:var(--border);border:none;padding:0;cursor:pointer;transition:all .15s;position:relative}
.carousel-dot::after{content:'';position:absolute;inset:-8px}
.carousel-dot.active{background:var(--p);width:20px;border-radius:5px}
.carousel-dot.correct{background:var(--g)}
.carousel-dot.incorrect{background:var(--r)}
.carousel-dot.correct.active,.carousel-dot.incorrect.active{width:20px;border-radius:5px}
.carousel-viewport{overflow:hidden}
.carousel-track{display:flex;transition:transform .32s cubic-bezier(.4,0,.2,1)}
.carousel-slide{flex:0 0 100%;max-width:100%;min-width:0;padding:0 2px}
.carousel-nav{display:flex;justify-content:space-between;align-items:center;margin-top:1rem;gap:10px}
.carousel-count{font-size:12px;color:var(--hint);font-family:'JetBrains Mono',monospace}

/* Training story framing */
.act-label{display:inline-block;font:600 10px 'JetBrains Mono',monospace;letter-spacing:.14em;text-transform:uppercase;color:var(--o);background:var(--ol);padding:4px 10px;border-radius:100px;margin-bottom:.7rem}
.tsec .lede{font-size:15px;line-height:1.65;color:var(--text);margin-bottom:.8rem}
.tsec .lede strong{color:var(--pt)}
.story-scene{background:var(--bg);border-left:3px solid var(--p);border-radius:0 10px 10px 0;padding:.9rem 1.1rem;margin:.9rem 0}
.story-line{display:flex;gap:10px;align-items:baseline;font-size:14px;line-height:1.6;margin-bottom:.45rem}
.story-line:last-child{margin-bottom:0}
.story-line .who{flex:0 0 92px;font:600 10.5px 'JetBrains Mono',monospace;letter-spacing:.04em;text-transform:uppercase;color:var(--hint);padding-top:2px}
.story-line .said{color:var(--text)}
.story-punch{font-size:14px;line-height:1.65;color:var(--pt);background:var(--pl);border-radius:8px;padding:.8rem 1rem;margin-top:.9rem}
.story-punch strong{font-weight:600}

/* Instrument comparison cards */
.instr-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:1rem 0}
@media(max-width:640px){.instr-cards{grid-template-columns:1fr}}
.instr-card{border:1px solid var(--border);border-radius:10px;padding:.9rem 1rem;background:var(--bg)}
.instr-card .job{font:600 10px 'JetBrains Mono',monospace;letter-spacing:.08em;text-transform:uppercase;color:var(--o);margin-bottom:5px}
.instr-card .geo{font-size:14px;font-weight:600;color:var(--pt);margin-bottom:3px}
.instr-card .eg{font-size:11.5px;color:var(--hint);font-family:'JetBrains Mono',monospace;margin-bottom:6px}
.instr-card .why{font-size:12.5px;color:var(--muted);line-height:1.5}
.instr-note{font-size:11.5px;color:var(--hint);font-style:italic;text-align:center}

/* Small illustrative graphics inside training slides */
.mini-ellipses{display:flex;gap:16px;justify-content:center;margin:1.1rem 0;flex-wrap:wrap}
.mini-ellipse-item{flex:0 1 90px;text-align:center}
.mini-ellipse-item svg{width:100%;max-width:104px;height:auto}
.mini-ellipse-item span{display:block;font-size:11px;color:var(--muted);margin-top:4px;font-family:'JetBrains Mono',monospace}
.swatch-compare{display:flex;gap:28px;align-items:center;justify-content:center;margin:1.1rem 0;flex-wrap:wrap}
.swatch-pair{display:flex;align-items:center;gap:8px}
.swatch-pair .sw{width:64px;height:64px;border-radius:10px;border:1px solid var(--border);flex-shrink:0}
.swatch-caption{font-size:12px;color:var(--muted);text-align:center;margin-top:6px}
.illum-row{display:flex;gap:22px;margin:1.1rem 0;justify-content:center;flex-wrap:wrap}
.illum-item{text-align:center}
.illum-item .sw{width:68px;height:68px;border-radius:50%;border:1px solid var(--border);margin:0 auto 6px}
.illum-item span{font-size:11.5px;color:var(--muted);font-family:'JetBrains Mono',monospace}
.gloss-compare{display:flex;gap:28px;margin:1.1rem 0;justify-content:center}
.gloss-sw{width:100px;height:100px;border-radius:12px;position:relative;overflow:hidden;border:1px solid var(--border)}
.gloss-sw.glossy::after{content:'';position:absolute;top:-20%;left:-30%;width:60%;height:140%;background:linear-gradient(115deg,rgba(255,255,255,.75),rgba(255,255,255,0) 55%);transform:rotate(-8deg)}
.gloss-label{font-size:11.5px;color:var(--muted);text-align:center;margin-top:8px}
.geo-diagram{display:block;width:100%;margin:1rem auto;max-width:260px}

/* Quiz */
.qprog{font-size:12px;color:var(--hint);margin-bottom:.6rem}
.qcard{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.3rem 1.4rem;margin-bottom:1rem}
.qnum{font-size:11px;color:var(--hint);font-weight:600;text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px}
.qtext{font-size:15px;font-weight:500;margin-bottom:1rem;line-height:1.55}
.qopt{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1.5px solid var(--border);border-radius:10px;margin-bottom:8px;cursor:pointer;font-size:13.5px;transition:all .12s}
.qopt:hover{border-color:#C4B5FD;background:var(--bg)}
.qopt.sel{border-color:var(--p);background:var(--pl)}
.qopt.correct{border-color:var(--g);background:var(--gl)}
.qopt.incorrect{border-color:var(--border);background:var(--bg);opacity:.65}
.qopt.incorrect.picked{border-color:var(--r);background:var(--rl);opacity:1}
.qopt.picked{box-shadow:0 0 0 2px var(--p) inset}
.qopt input{accent-color:var(--p)}
.qexpl{font-size:12.5px;color:var(--muted);background:var(--bg);border-radius:8px;padding:.7rem .9rem;margin-top:.5rem;display:none}
.qexpl.on{display:block}
.score-ring{width:120px;height:120px;margin:0 auto}
.qresult{text-align:center;padding:1rem 0}
.qresult .big{font-family:'JetBrains Mono',monospace;font-size:40px;font-weight:600;background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.topic-row{display:flex;justify-content:space-between;align-items:center;padding:9px 0;border-bottom:1px solid #F3F4F6;font-size:13px}
.topic-row:last-child{border-bottom:none}

@media(max-width:640px){
  .g2,.g3,.g4{grid-template-columns:1fr 1fr}
  .plots{grid-template-columns:1fr}
  .modes{flex-direction:column}
  .rv{font-size:26px}
}
@media print{.bcalc,.badd,.bsave,.bprint,.bswap,.modes,.hsec,.arow{display:none!important}}