/* จานสี: calm white chrome so the swatches carry the colour. Paint-chip cards, ink pills, mono codes. */
:root{
  --bg:#ffffff;--well:#f5f4f1;--ink:#191919;--muted:#5d5a55;--line:#e3e1dc;--line-2:#cfccc5;
  --link:#7b2d6a;--btn:#191919;--btn-ink:#ffffff;--ok:#1e6b3c;--bad:#a12a1c;
  --radius:12px;--wrap:860px;
  --font:"Leelawadee UI","Leelawadee","Thonburi","Noto Sans Thai","Sukhumvit Set",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"Cascadia Mono","SF Mono",Consolas,"Roboto Mono",monospace;
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#151515;--well:#1f1f1e;--ink:#ecebe7;--muted:#aaa69f;--line:#353431;--line-2:#4a4844;
    --link:#eaa8dc;--btn:#ecebe7;--btn-ink:#151515;--ok:#8fd6a6;--bad:#ff9d8c}
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.7}
a{color:var(--link);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
img,svg{max-width:100%;height:auto}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--bg);padding:8px 12px;z-index:9}
.skip:focus{left:8px;top:8px}
:focus-visible{outline:3px solid var(--link);outline-offset:2px;border-radius:6px}

/* header: white bar, brand discs, a strip of seven paint-chip colours underneath */
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:4px 16px;flex-wrap:wrap;padding-top:6px;padding-bottom:6px}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.3rem;color:var(--ink);text-decoration:none;min-height:44px}
.brand svg{width:32px;height:32px;flex:none}
.nav{display:flex;flex-wrap:wrap;gap:0 2px;list-style:none;margin:0;padding:0}
.nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 12px;border-radius:999px;color:var(--ink);text-decoration:none;font-size:.97rem}
.nav a:hover{background:var(--well)}
.nav a[aria-current]{background:var(--ink);color:var(--bg);font-weight:700}
.strip{display:flex;height:6px}
.strip i{flex:1}
.strip i:nth-child(1){background:#f4c2c2}.strip i:nth-child(2){background:#ffe5b4}.strip i:nth-child(3){background:#fffacd}
.strip i:nth-child(4){background:#d0f0c0}.strip i:nth-child(5){background:#b0e0e6}.strip i:nth-child(6){background:#ccccff}
.strip i:nth-child(7){background:#e0b0ff}

main{padding:18px 0 56px}
.crumbs{font-size:.9rem;color:var(--muted);margin:0 0 2px}
.crumbs a{color:var(--muted)}
h1{font-size:clamp(1.8rem,5.2vw,2.5rem);line-height:1.25;font-weight:800;margin:.25em 0 .35em}
h2{font-size:1.45rem;line-height:1.3;margin:2.3em 0 .5em}
h3{font-size:1.13rem;line-height:1.35;margin:1.6em 0 .35em}
p{margin:0 0 1em}
.lead{font-size:1.07rem;max-width:42em}
ul,ol{padding-left:1.3em}
li{margin:.25em 0}
code,.code{font-family:var(--mono);font-size:.9em}
p code,li code,td code{background:var(--well);padding:0 .3em;border-radius:4px}
.muted{color:var(--muted)}

/* tool well */
.panel{background:var(--well);border-radius:16px;padding:16px;margin:18px 0 10px}
.panel h2{margin:0 0 .4em;font-size:1.15rem}
.panel>p:last-child{margin-bottom:0}
.ctl{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;margin:0 0 12px}
.ctl label,.lbl{font-weight:700;font-size:.95rem}
input[type=color]{inline-size:52px;block-size:44px;padding:3px;border:1px solid var(--line-2);border-radius:10px;background:var(--bg);cursor:pointer}
input.hex{font-family:var(--mono);font-size:1rem;inline-size:8.5em;min-height:44px;padding:0 10px;border:1px solid var(--line-2);border-radius:10px;background:var(--bg);color:var(--ink);text-transform:uppercase}
input.hex[aria-invalid=true]{border-color:var(--bad)}
input[type=range]{inline-size:min(220px,100%);accent-color:var(--ink);min-height:44px}
.btn{font:inherit;font-size:.97rem;min-height:44px;padding:0 18px;border-radius:999px;border:1px solid var(--line-2);background:var(--bg);color:var(--ink);cursor:pointer;display:inline-flex;align-items:center;gap:6px}
.btn:hover{border-color:var(--ink)}
.btn:active{transform:translateY(1px)}
.btn.main{background:var(--btn);color:var(--btn-ink);border-color:var(--btn)}
.btn.sm{min-height:36px;padding:0 12px;font-size:.88rem}
.btn:disabled{opacity:.5;cursor:not-allowed}
.seg{display:flex;flex-wrap:wrap;gap:6px;border:0;padding:0;margin:0}
.seg legend{font-weight:700;font-size:.95rem;margin:0 0 6px;padding:0}
.seg label{position:relative;display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border:1px solid var(--line-2);border-radius:999px;background:var(--bg);cursor:pointer;font-size:.95rem}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg label:has(input:checked){background:var(--ink);color:var(--bg);border-color:var(--ink);font-weight:700}
.seg label:has(input:focus-visible){outline:3px solid var(--link);outline-offset:2px}
.note{font-size:.9rem;color:var(--muted);margin:10px 0 0}

/* paint chips */
.chips{list-style:none;padding:0;margin:12px 0 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(148px,1fr));gap:12px}
.chips li{margin:0}
.chip{display:flex;flex-direction:column;inline-size:100%;padding:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg);color:var(--ink);font:inherit;text-align:left;cursor:pointer}
.chip .sw{display:block;block-size:84px;background:var(--c)}
.chip .t{display:block;padding:8px 10px 10px;line-height:1.4}
.chip b{display:block;font-size:.95rem}
.chip code{display:block;font-size:.95rem;font-weight:700}
.chip small{display:block;font-size:.8rem;color:var(--muted);font-family:var(--mono)}
.chip:hover{border-color:var(--line-2)}
@media (prefers-reduced-motion:no-preference){
  .chip{transition:transform .2s ease-out,box-shadow .2s ease-out}
  .chip:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgb(0 0 0/.08)}
}
.fam{font-size:1.05rem;margin:1.4em 0 0}
.gen{min-block-size:166px}

/* tint ramp */
.ramp{list-style:none;padding:0;margin:12px 0 0;display:grid;grid-template-columns:repeat(6,1fr);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.ramp li{margin:0}
.ramp button{display:flex;flex-direction:column;justify-content:flex-end;inline-size:100%;min-block-size:112px;padding:8px;border:0;background:var(--c);color:var(--fg,#1f1f1f);font:inherit;font-size:.8rem;line-height:1.35;text-align:left;cursor:pointer}
.ramp button code{font-size:.85rem;font-weight:700}
@media (max-width:560px){.ramp{grid-template-columns:repeat(3,1fr)}}

/* mixer */
.mixrow{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;padding:10px 0;border-bottom:1px solid var(--line)}
.mixrow:first-of-type{padding-top:0}
.mixrow .lbl{inline-size:3.6em}
.mixrow output{font-weight:700;font-variant-numeric:tabular-nums;min-inline-size:4.5em}
.bar{display:flex;block-size:14px;border-radius:7px;overflow:hidden;margin:12px 0 4px;background:var(--line)}
.bar i{display:block;block-size:100%}
.results{display:grid;grid-template-columns:2fr 1fr 1fr;gap:12px;margin-top:14px}
.res{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg);display:flex;flex-direction:column}
.res .sw{block-size:120px;background:var(--c,#ddd)}
.res:first-child .sw{block-size:170px}
.res .t{padding:8px 10px 10px;line-height:1.45;display:flex;flex-direction:column;gap:4px;flex:1}
.res .t b{font-size:.95rem}
.res .t code{font-weight:700;font-size:1rem}
.res .t small{color:var(--muted);font-size:.82rem}
.res .btn{align-self:flex-start;margin-top:auto}
@media (max-width:640px){.results{grid-template-columns:1fr 1fr}.res:first-child{grid-column:1/-1}}
.presets{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0 0}
.dots{display:inline-flex;gap:2px}
.dots i,.dot{display:inline-block;inline-size:14px;block-size:14px;border-radius:50%;border:1px solid rgb(0 0 0/.15);vertical-align:-2px;background:var(--c)}

/* pairs */
.scheme{margin:0 0 16px}
.scheme h3{margin:0 0 2px;font-size:1.02rem}
.scheme p{margin:0 0 8px;font-size:.92rem;color:var(--muted)}
.row{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(100px,1fr));border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);min-block-size:104px}
.row li{margin:0}
.row button{display:flex;flex-direction:column;justify-content:flex-end;inline-size:100%;block-size:100%;min-block-size:104px;padding:8px 10px;border:0;background:var(--c);color:var(--fg);font:inherit;font-size:.8rem;line-height:1.35;text-align:left;cursor:pointer}
.row button code{font-size:.9rem;font-weight:700}
.preview{border-radius:var(--radius);padding:18px;margin:4px 0 8px;background:var(--pb);color:var(--pf);border:1px solid var(--line)}
.preview h3{margin:0 0 4px;font-size:1.25rem;color:inherit}
.preview p{margin:0 0 12px;color:inherit}
.preview span{display:inline-flex;align-items:center;min-height:40px;padding:0 16px;border-radius:999px;background:var(--pa);color:var(--pt);font-weight:700}
.verdict{list-style:none;padding:0;margin:8px 0 0;display:flex;flex-wrap:wrap;gap:6px 14px;font-size:.92rem}
.verdict li{margin:0}
.verdict [data-ok=true]{color:var(--ok)}
.verdict [data-ok=false]{color:var(--bad)}
.ratio{font-size:2rem;font-weight:800;font-variant-numeric:tabular-nums;line-height:1.2}

/* tables */
.scroll{overflow-x:auto}
.tbl{inline-size:100%;border-collapse:collapse;margin:8px 0 18px;font-size:.96rem}
.tbl th,.tbl td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{font-size:.9rem;color:var(--muted);font-weight:700;border-bottom:2px solid var(--ink)}
.tbl td .btn{white-space:nowrap}

/* home tool list: each row shows a swatch strip */
.tools{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:12px}
.tools li{margin:0}
.tools a{display:grid;grid-template-columns:96px 1fr;gap:14px;align-items:center;padding:12px;border:1px solid var(--line);border-radius:16px;text-decoration:none;color:var(--ink)}
.tools a:hover{border-color:var(--ink)}
.tools .ic{display:grid;grid-template-columns:repeat(3,1fr);block-size:72px;border-radius:10px;overflow:hidden}
.tools b{display:block;font-size:1.1rem;color:var(--link)}
.tools span.d{display:block;color:var(--muted);font-size:.94rem;line-height:1.55}

.faq h3{margin-top:1.3em}
.src{margin-top:2.6em;padding-top:1em;border-top:1px solid var(--line);font-size:.93rem;color:var(--muted)}
.src h2{font-size:1.05rem;margin:0 0 .4em;color:var(--ink)}

.toast{position:fixed;left:50%;bottom:18px;transform:translate(-50%,12px);margin:0;padding:10px 16px;border-radius:999px;background:var(--ink);color:var(--bg);font-size:.95rem;opacity:0;pointer-events:none;max-inline-size:calc(100% - 32px);z-index:10}
.toast.on{opacity:1;transform:translate(-50%,0)}
@media (prefers-reduced-motion:no-preference){.toast{transition:opacity .2s,transform .2s}}

.foot{border-top:1px solid var(--line);padding:20px 0 30px;font-size:.92rem;color:var(--muted)}
.foot ul{display:flex;flex-wrap:wrap;gap:0 4px;list-style:none;padding:0;margin:0 0 6px}
.foot a{display:inline-flex;align-items:center;min-height:44px;padding:0 10px 0 0;color:var(--muted)}
.foot p{margin:0}
.sr{position:absolute!important;inline-size:1px;block-size:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.addrow{margin:10px 0 0}
.presets-h{margin:14px 0 0}
.sample{margin:4px 0 10px;padding:14px 16px;border-radius:var(--radius);border:1px solid var(--line);background:var(--cb);color:var(--cf);font-size:1.05rem}
.row button span{opacity:.9}