/* Pixel Bead Pattern Lab - Main Stylesheet */
:root{
  --bg:#fafaf7;
  --bg-2:#f1ede4;
  --surface:#ffffff;
  --text:#1f2430;
  --muted:#6b7280;
  --primary:#d94f6a;        /* craft coral */
  --primary-dark:#b53d57;
  --accent:#2f9e8d;         /* teal */
  --accent-2:#e8a33d;       /* amber */
  --border:#e5e0d6;
  --shadow:0 4px 14px rgba(31,36,48,.08);
  --radius:14px;
  --radius-sm:8px;
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* Header */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--border);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.1rem;color:var(--text)}
.brand .dot{width:14px;height:14px;border-radius:4px;background:linear-gradient(135deg,var(--primary),var(--accent-2))}
.nav-links{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.nav-links a{
  padding:8px 12px;border-radius:8px;color:var(--text);font-size:.92rem;font-weight:500;
}
.nav-links a:hover{background:var(--bg-2);text-decoration:none}
.nav-actions{display:flex;align-items:center;gap:8px}
.lang-btn,.fav-btn{
  background:var(--bg-2);border:1px solid var(--border);border-radius:8px;
  padding:7px 12px;cursor:pointer;font-size:.85rem;color:var(--text);font-weight:600;
}
.lang-btn:hover,.fav-btn:hover{background:#e8e2d4}
.menu-toggle{display:none;background:none;border:none;font-size:1.4rem;cursor:pointer;color:var(--text)}

/* Hero */
.hero{
  padding:72px 0 56px;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(232,163,61,.18), transparent 60%),
    radial-gradient(900px 500px at 10% 10%, rgba(47,158,141,.15), transparent 60%),
    var(--bg);
}
.hero h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.1;letter-spacing:-.02em;margin-bottom:16px}
.hero h1 .grad{background:linear-gradient(135deg,var(--primary),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:1.15rem;color:var(--muted);max-width:640px;margin-bottom:28px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 22px;border-radius:10px;font-weight:600;border:1px solid transparent;cursor:pointer;
  font-size:.95rem;transition:transform .1s, box-shadow .2s;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(217,79,106,.3)}
.btn-primary:hover{background:var(--primary-dark)}
.btn-ghost{background:var(--surface);color:var(--text);border-color:var(--border)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}

/* Sections */
section{padding:56px 0}
.section-head{margin-bottom:32px}
.section-head h2{font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:8px}
.section-head p{color:var(--muted)}

/* Tool cards grid */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.card{
  position:relative;border-radius:var(--radius);overflow:hidden;
  background:var(--surface);border:1px solid var(--border);
  box-shadow:var(--shadow);transition:transform .2s, box-shadow .2s;
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-4px);box-shadow:0 10px 26px rgba(31,36,48,.14)}
.card-img{
  height:150px;background-size:cover;background-position:center;
  position:relative;
}
.card-img::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(0,0,0,.55))}
.card-body{padding:16px;flex:1;display:flex;flex-direction:column;gap:8px}
.card-body h3{font-size:1.05rem;line-height:1.3}
.card-body p{color:var(--muted);font-size:.88rem;flex:1}
.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:8px}
.tag{font-size:.72rem;padding:3px 9px;border-radius:999px;background:var(--bg-2);color:var(--muted);font-weight:600}
.tag.brand{background:rgba(47,158,141,.14);color:var(--accent)}
.tag.color{background:rgba(232,163,61,.16);color:#a36f10}
.tag.edit{background:rgba(217,79,106,.14);color:var(--primary)}
.fav-star{
  position:absolute;top:10px;right:10px;z-index:2;
  background:rgba(255,255,255,.9);border:none;border-radius:50%;
  width:32px;height:32px;cursor:pointer;font-size:1rem;display:grid;place-items:center;
  box-shadow:0 2px 6px rgba(0,0,0,.15);
}
.fav-star.on{color:var(--accent-2)}

/* Feature blocks */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.feature{
  border-radius:var(--radius);padding:28px;color:#fff;position:relative;overflow:hidden;
  min-height:200px;display:flex;flex-direction:column;justify-content:flex-end;
  background-size:cover;background-position:center;
}
.feature::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.1),rgba(0,0,0,.7))}
.feature>*{position:relative;z-index:1}
.feature h3{font-size:1.2rem;margin-bottom:6px}
.feature p{font-size:.9rem;opacity:.92}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;counter-reset:step}
.step{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;position:relative}
.step::before{counter-increment:step;content:counter(step);position:absolute;top:-14px;left:20px;width:32px;height:32px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:700}
.step h3{margin:8px 0 8px}
.step p{color:var(--muted);font-size:.9rem}

/* Footer */
.site-footer{background:#1a1f2b;color:#c9cedb;padding:40px 0 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:24px}
.footer-grid h4{color:#fff;margin-bottom:12px;font-size:.95rem}
.footer-grid a{color:#c9cedb;display:block;padding:4px 0;font-size:.88rem}
.footer-bottom{border-top:1px solid #2a3142;margin-top:24px;padding-top:16px;text-align:center;font-size:.82rem;color:#8890a3}

/* Tool page layout */
.tool-layout{display:grid;grid-template-columns:320px 1fr;gap:24px;padding:32px 0}
.tool-panel{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);align-self:start;position:sticky;top:80px;
}
.tool-panel h3{font-size:1.05rem;margin-bottom:14px}
.field{margin-bottom:14px}
.field label{display:block;font-size:.85rem;font-weight:600;margin-bottom:6px}
.field input[type=range]{width:100%}
.field input[type=text],.field input[type=number],.field select,
.field textarea{
  width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:8px;
  font-size:.9rem;font-family:inherit;background:#fff;
}
.field textarea{min-height:80px;resize:vertical}
.range-val{float:right;color:var(--primary);font-weight:700}
.tool-canvas{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);min-height:400px;
}
.tool-canvas canvas{max-width:100%;height:auto;display:block;margin:0 auto;border:1px solid var(--border);border-radius:6px}
.legend{margin-top:18px}
.legend-row{display:flex;align-items:center;gap:10px;padding:6px 8px;border-radius:6px;font-size:.85rem}
.legend-row:nth-child(odd){background:var(--bg-2)}
.swatch{width:22px;height:22px;border-radius:5px;border:1px solid rgba(0,0,0,.15);flex-shrink:0}
.legend-code{font-weight:700;min-width:70px}
.legend-name{flex:1;color:var(--muted)}
.legend-count{font-weight:600;color:var(--primary)}

/* Converter canvas grid */
.grid-render{display:inline-block;border:1px solid var(--border);background:#fff;padding:4px;border-radius:6px;line-height:0}

/* Articles */
.article-hero{height:260px;background-size:cover;background-position:center;border-radius:var(--radius);margin-bottom:24px}
.article-content{max-width:760px;margin:0 auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.article-content h1{font-size:2rem;margin-bottom:8px}
.article-content .meta{color:var(--muted);font-size:.88rem;margin-bottom:20px}
.article-content h2{margin-top:28px;margin-bottom:10px;font-size:1.4rem}
.article-content h3{margin-top:20px;margin-bottom:8px;font-size:1.15rem}
.article-content p{margin-bottom:14px}
.article-content ul,.article-content ol{margin:0 0 14px 22px}
.article-content li{margin-bottom:6px}
.article-content blockquote{border-left:4px solid var(--primary);background:var(--bg-2);padding:12px 16px;margin:14px 0;border-radius:0 8px 8px 0;color:#444}

/* Color chart */
.color-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px}
.color-chip{border:1px solid var(--border);border-radius:8px;overflow:hidden;background:#fff}
.color-chip .sw{height:60px}
.color-chip .info{padding:8px;font-size:.78rem}
.color-chip .code{font-weight:700}
.color-chip .name{color:var(--muted);font-size:.72rem}

/* Responsive */
@media(max-width:900px){
  .tool-layout{grid-template-columns:1fr}
  .tool-panel{position:static}
}
@media(max-width:760px){
  .menu-toggle{display:block}
  .nav-links{
    position:absolute;top:64px;left:0;right:0;flex-direction:column;
    background:#fff;border-bottom:1px solid var(--border);
    padding:12px 20px;gap:4px;display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:10px 12px}
  .hero{padding:48px 0 36px}
  .tool-canvas{padding:14px}
  .article-content{padding:20px}
  .article-hero{height:180px}
}
@media(max-width:480px){
  .container{padding:0 14px}
  .cards{grid-template-columns:1fr}
  .hero h1{font-size:1.9rem}
}

/* Print */
@media print{
  .site-header,.site-footer,.nav-actions,.btn,.fav-star{display:none!important}
  .tool-canvas{box-shadow:none;border:none}
  body{background:#fff}
}