/* Yexla — Color Tools | Design System */
:root{
  --bg:#f7f8fb;--bg2:#ffffff;--bg3:#eef0f6;--text:#14161f;--text2:#5b6172;--line:#e4e7ef;
  --brand:#6c5ce7;--brand2:#00b8d9;--accent:#ff6b9d;
  --grad:linear-gradient(135deg,#6c5ce7 0%,#00b8d9 100%);
  --grad-soft:linear-gradient(135deg,rgba(108,92,231,.10),rgba(0,184,217,.08));
  --card:#ffffff;--glass:rgba(255,255,255,.72);--shadow:0 4px 24px rgba(20,22,31,.07);
  --shadow-lg:0 12px 40px rgba(20,22,31,.13);--r:14px;--r-lg:22px;--r-sm:9px;
  --ok:#16a34a;--warn:#d97706;--bad:#dc2626;
  --font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Inter,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color-scheme:light;
}
[data-theme=dark]{
  --bg:#0e1016;--bg2:#151823;--bg3:#1c2030;--text:#eef0f6;--text2:#9aa1b5;--line:#262b3d;
  --card:#151823;--glass:rgba(21,24,35,.72);--shadow:0 4px 24px rgba(0,0,0,.35);
  --shadow-lg:0 12px 40px rgba(0,0,0,.5);
  --grad-soft:linear-gradient(135deg,rgba(108,92,231,.16),rgba(0,184,217,.10));
  color-scheme:dark;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.65;font-size:16px;transition:background .3s,color .3s}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:3px solid var(--brand2);outline-offset:2px;border-radius:4px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:.6rem 1rem;border-radius:0 0 var(--r-sm) 0;z-index:200}
.skip-link:focus{left:0}
.container{max-width:1240px;margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:18px;height:64px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:1.3rem;color:var(--text);letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo-mark{width:30px;height:30px;border-radius:9px;background:var(--grad);display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:.95rem;font-weight:900}
.nav-links{display:flex;gap:4px;list-style:none;margin-left:6px}
.nav-links a{color:var(--text2);font-weight:600;font-size:.92rem;padding:.45rem .7rem;border-radius:var(--r-sm);transition:.2s}
.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--text);background:var(--bg3);text-decoration:none}
.nav-spacer{flex:1}
.nav-btn{border:1px solid var(--line);background:var(--card);color:var(--text2);border-radius:var(--r-sm);padding:.45rem .7rem;cursor:pointer;font-size:.9rem;display:inline-flex;align-items:center;gap:6px;transition:.2s;font-family:var(--font)}
.nav-btn:hover{color:var(--text);border-color:var(--brand);transform:translateY(-1px)}
.search-trigger{min-width:180px;justify-content:flex-start}
.search-trigger kbd{margin-left:auto;font-family:var(--mono);font-size:.72rem;background:var(--bg3);padding:1px 6px;border-radius:5px;border:1px solid var(--line)}
.hamburger{display:none}
@media(max-width:920px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg2);flex-direction:column;padding:12px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg)}
  .nav-links.open{display:flex}
  .hamburger{display:inline-flex}
  .search-trigger{min-width:0}
  .search-trigger span.label{display:none}
}

/* Layout with sidebar */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px;padding:28px 0 60px}
.layout.no-sidebar{grid-template-columns:minmax(0,1fr)}
@media(max-width:1000px){.layout{grid-template-columns:minmax(0,1fr)}}
.sidebar{position:sticky;top:84px;align-self:start;display:flex;flex-direction:column;gap:18px}
@media(max-width:1000px){.sidebar{position:static}}

/* Ads */
.ad-slot{border:1px dashed var(--line);border-radius:var(--r);background:var(--bg3);min-height:250px;display:flex;align-items:center;justify-content:center;color:var(--text2);font-size:.8rem;text-transform:uppercase;letter-spacing:.08em}
.ad-slot.ad-bottom{min-height:120px;margin-top:34px}

/* Cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:22px;transition:transform .22s,box-shadow .22s}
.card.hoverable:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.glass{background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.card h3{font-size:1.02rem;margin-bottom:.35rem}
.card p{color:var(--text2);font-size:.9rem}
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}
.tool-card{display:block;color:var(--text)}
.tool-card:hover{text-decoration:none}
.tool-card .chip-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.chip{display:inline-block;font-size:.72rem;font-weight:700;padding:.2rem .6rem;border-radius:999px;background:var(--grad-soft);color:var(--brand)}
.icon-dot{width:38px;height:38px;border-radius:11px;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.05rem}

/* Hero */
.hero{padding:64px 0 44px;text-align:center;background:var(--grad-soft);border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(2rem,5vw,3.3rem);letter-spacing:-.03em;line-height:1.12;margin-bottom:14px}
.hero h1 .grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{max-width:640px;margin:0 auto 26px;color:var(--text2);font-size:1.08rem}
.hero-search{max-width:560px;margin:0 auto 22px;display:flex;background:var(--card);border:1px solid var(--line);border-radius:999px;box-shadow:var(--shadow);overflow:hidden}
.hero-search input{flex:1;border:0;background:transparent;padding:.95rem 1.4rem;font-size:1rem;color:var(--text);font-family:var(--font)}
.hero-search input:focus{outline:none}
.hero-search button{border:0;background:var(--grad);color:#fff;padding:0 1.6rem;font-weight:700;cursor:pointer;font-size:.95rem}
.hero-chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.hero-chips a{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:.4rem .9rem;font-size:.85rem;color:var(--text2);font-weight:600;transition:.2s}
.hero-chips a:hover{color:var(--brand);border-color:var(--brand);text-decoration:none;transform:translateY(-1px)}

/* Sections */
.section{padding:38px 0 8px}
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:18px;gap:12px;flex-wrap:wrap}
.section-head h2{font-size:1.45rem;letter-spacing:-.02em}
.section-head a{font-size:.9rem;font-weight:600}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:7px;border:0;border-radius:999px;padding:.62rem 1.25rem;font-weight:700;font-size:.92rem;cursor:pointer;transition:.2s;font-family:var(--font);text-decoration:none}
.btn:hover{transform:translateY(-1px);text-decoration:none}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 4px 14px rgba(108,92,231,.35)}
.btn-ghost{background:var(--card);color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand)}
.btn-sm{padding:.4rem .85rem;font-size:.82rem}
.btn-copy{position:relative}

/* Tool UI */
.tool-wrap{display:flex;flex-direction:column;gap:22px}
.tool-panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:26px}
.tool-title h1{font-size:clamp(1.5rem,3.4vw,2.1rem);letter-spacing:-.02em;margin-bottom:6px}
.tool-title p.lead{color:var(--text2);max-width:760px}
.tool-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:.82rem;font-weight:700;color:var(--text2);text-transform:uppercase;letter-spacing:.05em}
.field input[type=text],.field input[type=number],.field textarea,.field select{background:var(--bg3);border:1px solid var(--line);border-radius:var(--r-sm);padding:.65rem .85rem;font-size:1rem;color:var(--text);font-family:var(--mono);transition:border .2s;width:100%}
.field select{font-family:var(--font)}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--brand);outline:none}
.io-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:start}
.io-swap{align-self:center;font-size:1.4rem;color:var(--text2)}
@media(max-width:760px){.io-grid{grid-template-columns:1fr}.io-swap{transform:rotate(90deg);justify-self:center}}
.preview-box{height:130px;border-radius:var(--r);border:1px solid var(--line);position:relative;overflow:hidden;background-image:conic-gradient(#ccc 25%,#fff 0 50%,#ccc 0 75%,#fff 0);background-size:18px 18px}
.preview-fill{position:absolute;inset:0}
.result-row{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--bg3);border:1px solid var(--line);border-radius:var(--r-sm);padding:.6rem .85rem;margin-bottom:9px}
.result-row code{font-family:var(--mono);font-size:.93rem;word-break:break-all}
.result-row .label{font-size:.72rem;font-weight:800;color:var(--text2);letter-spacing:.06em;min-width:56px}
input[type=range]{width:100%;accent-color:var(--brand);height:28px}
input[type=color]{width:56px;height:40px;border:1px solid var(--line);border-radius:var(--r-sm);background:none;cursor:pointer;padding:2px}

/* Swatches / palettes */
.swatch-row{display:flex;border-radius:var(--r);overflow:hidden;min-height:170px;box-shadow:var(--shadow)}
.swatch{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;padding:14px 6px;cursor:pointer;transition:flex .25s;position:relative;border:0;font-family:var(--mono)}
.swatch:hover{flex:1.35}
.swatch .hexlab{background:rgba(0,0,0,.35);color:#fff;font-size:.78rem;padding:2px 8px;border-radius:6px;backdrop-filter:blur(4px)}
.swatch .lock{position:absolute;top:10px;right:10px;background:rgba(0,0,0,.3);border:0;color:#fff;border-radius:7px;width:26px;height:26px;cursor:pointer;font-size:.8rem}
.mini-swatches{display:flex;gap:6px;flex-wrap:wrap}
.mini-swatch{width:34px;height:34px;border-radius:9px;border:1px solid var(--line);cursor:pointer;transition:.15s}
.mini-swatch:hover{transform:scale(1.12)}
.palette-strip{display:flex;height:56px;border-radius:var(--r-sm);overflow:hidden;box-shadow:var(--shadow)}
.palette-strip span{flex:1}

/* Tables */
.table-wrap{overflow-x:auto;border-radius:var(--r);border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;font-size:.92rem;background:var(--card)}
th,td{padding:.65rem .9rem;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--bg3);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text2)}
tr:last-child td{border-bottom:0}

/* Tabs / accordions */
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}
.tab-btn{border:1px solid var(--line);background:var(--card);color:var(--text2);padding:.45rem .95rem;border-radius:999px;cursor:pointer;font-weight:600;font-size:.86rem;font-family:var(--font);transition:.2s}
.tab-btn[aria-selected=true]{background:var(--grad);color:#fff;border-color:transparent}
details.acc{border:1px solid var(--line);border-radius:var(--r);background:var(--card);margin-bottom:10px;overflow:hidden}
details.acc summary{padding:1rem 1.2rem;cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;align-items:center}
details.acc summary::after{content:"+";font-size:1.2rem;color:var(--text2)}
details.acc[open] summary::after{content:"–"}
details.acc .acc-body{padding:0 1.2rem 1.1rem;color:var(--text2)}

/* Breadcrumbs */
.breadcrumbs{padding:16px 0 0;font-size:.85rem;color:var(--text2)}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:4px}
.breadcrumbs li+li::before{content:"›";margin:0 6px;color:var(--text2)}
.breadcrumbs a{color:var(--text2)}
.breadcrumbs a:hover{color:var(--brand)}

/* Prose (articles) */
.prose{max-width:800px}
.prose h1{font-size:clamp(1.7rem,4vw,2.5rem);letter-spacing:-.02em;line-height:1.15;margin-bottom:12px}
.prose h2{font-size:1.5rem;margin:2.1rem 0 .8rem;letter-spacing:-.01em}
.prose h3{font-size:1.15rem;margin:1.5rem 0 .6rem}
.prose p{margin-bottom:1rem;color:var(--text)}
.prose ul,.prose ol{margin:0 0 1rem 1.4rem}
.prose li{margin-bottom:.4rem}
.prose .table-wrap{margin:1.2rem 0}
.prose blockquote{border-left:4px solid var(--brand);padding:.4rem 1rem;background:var(--bg3);border-radius:0 var(--r-sm) var(--r-sm) 0;margin:1.2rem 0;color:var(--text2)}
.prose code{font-family:var(--mono);background:var(--bg3);border:1px solid var(--line);border-radius:6px;padding:.1rem .35rem;font-size:.88em}
.prose pre{background:#12141d;color:#e6e8f2;border-radius:var(--r);padding:1.1rem 1.3rem;overflow-x:auto;margin:1.2rem 0;font-size:.88rem}
.prose pre code{background:none;border:0;padding:0;color:inherit}
.meta-line{color:var(--text2);font-size:.88rem;margin-bottom:1.4rem}
.toc{background:var(--bg3);border:1px solid var(--line);border-radius:var(--r);padding:16px 20px;margin:1.2rem 0}
.toc strong{display:block;margin-bottom:.4rem}
.toc ol{margin:0 0 0 1.2rem}

/* Footer */
.site-footer{border-top:1px solid var(--line);background:var(--bg2);margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:28px;padding:44px 0 30px}
@media(max-width:900px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
.footer-grid h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.07em;color:var(--text2);margin-bottom:.7rem}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:.45rem}
.footer-grid a{color:var(--text2);font-size:.9rem}
.footer-grid a:hover{color:var(--brand)}
.footer-bottom{border-top:1px solid var(--line);padding:18px 0;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;color:var(--text2);font-size:.85rem}

/* Toast */
.toast-zone{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);z-index:300;display:flex;flex-direction:column;gap:8px;align-items:center}
.toast{background:var(--text);color:var(--bg);padding:.6rem 1.2rem;border-radius:999px;font-size:.9rem;font-weight:600;box-shadow:var(--shadow-lg);animation:toastIn .25s ease}
@keyframes toastIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

/* Search overlay */
.search-overlay{position:fixed;inset:0;background:rgba(10,12,20,.55);backdrop-filter:blur(4px);z-index:250;display:none;align-items:flex-start;justify-content:center;padding:12vh 18px 0}
.search-overlay.open{display:flex}
.search-modal{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);width:100%;max-width:600px;box-shadow:var(--shadow-lg);overflow:hidden}
.search-modal input{width:100%;border:0;border-bottom:1px solid var(--line);background:transparent;padding:1rem 1.3rem;font-size:1.05rem;color:var(--text);font-family:var(--font)}
.search-modal input:focus{outline:none}
.search-results{max-height:46vh;overflow-y:auto;padding:8px}
.search-results a{display:flex;justify-content:space-between;gap:10px;padding:.65rem .9rem;border-radius:var(--r-sm);color:var(--text);font-weight:600;font-size:.93rem}
.search-results a:hover,.search-results a.active{background:var(--bg3);text-decoration:none}
.search-results .cat{color:var(--text2);font-weight:500;font-size:.8rem}
.search-empty{padding:1.2rem;color:var(--text2);text-align:center;font-size:.9rem}

/* Skeleton */
.skeleton{background:linear-gradient(90deg,var(--bg3) 25%,var(--line) 50%,var(--bg3) 75%);background-size:200% 100%;animation:sk 1.4s infinite;border-radius:var(--r-sm)}
@keyframes sk{from{background-position:200% 0}to{background-position:-200% 0}}

/* Utility */
.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:26px}.mb-2{margin-bottom:16px}
.flex{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.muted{color:var(--text2)}
.small{font-size:.85rem}
.badge-ok{color:var(--ok);font-weight:800}
.badge-bad{color:var(--bad);font-weight:800}
.badge-warn{color:var(--warn);font-weight:800}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.gradient-preview{height:220px;border-radius:var(--r);border:1px solid var(--line)}
.big-preview{height:200px;border-radius:var(--r);border:1px solid var(--line)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media(max-width:760px){.two-col{grid-template-columns:1fr}}
.contrast-sample{border-radius:var(--r);padding:26px;border:1px solid var(--line)}
.score-big{font-size:2.6rem;font-weight:900;letter-spacing:-.03em}
.dropzone{border:2px dashed var(--line);border-radius:var(--r);padding:38px;text-align:center;color:var(--text2);cursor:pointer;transition:.2s}
.dropzone:hover,.dropzone.drag{border-color:var(--brand);background:var(--grad-soft)}
canvas.img-canvas{max-width:100%;border-radius:var(--r);border:1px solid var(--line)}
@media print{.site-header,.sidebar,.site-footer,.ad-slot{display:none}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}