/* DevToolsHive — premium developer toolkit. Single CSS, ~12KB. */
:root{
  --bg:#0b0d12; --surface:#11141b; --surface-2:#171b24; --border:#222836;
  --text:#e6e9ef; --text-dim:#9aa3b2; --muted:#6b7280;
  --accent:#7c5cff; --accent-2:#22d3ee; --ok:#22c55e; --warn:#f59e0b; --err:#ef4444;
  --radius:10px; --radius-sm:6px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --shadow:0 6px 24px -8px rgba(0,0,0,.5);
}
:root[data-theme="light"]{
  --bg:#fafbfc; --surface:#ffffff; --surface-2:#f4f6fa; --border:#e4e7ee;
  --text:#0d1117; --text-dim:#475569; --muted:#64748b;
  --shadow:0 6px 24px -10px rgba(20,30,60,.18);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--text);line-height:1.55;-webkit-font-smoothing:antialiased;font-size:15px}
a{color:var(--accent-2);text-decoration:none}
a:hover{text-decoration:underline}
code,kbd,pre,.mono{font-family:var(--mono);font-size:.92em}
kbd{background:var(--surface-2);border:1px solid var(--border);border-bottom-width:2px;border-radius:4px;padding:1px 6px;font-size:.8em}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.narrow{max-width:880px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:saturate(140%) blur(10px);background:color-mix(in oklab,var(--bg) 80%,transparent);border-bottom:1px solid var(--border)}
.site-header .row{display:flex;align-items:center;gap:18px;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--text);letter-spacing:-.01em}
.brand-mark{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:grid;place-items:center;color:#0b0d12;font-weight:900;font-size:13px}
.nav-primary{display:flex;gap:6px;margin-left:auto;align-items:center;flex-wrap:wrap}
.nav-primary a{color:var(--text-dim);padding:6px 10px;border-radius:6px;font-size:14px}
.nav-primary a:hover{color:var(--text);background:var(--surface-2);text-decoration:none}
.icon-btn{background:transparent;border:1px solid var(--border);color:var(--text);width:34px;height:34px;border-radius:8px;cursor:pointer;display:inline-grid;place-items:center;transition:all .15s}
.icon-btn:hover{background:var(--surface-2);border-color:var(--accent)}
.lang-select{background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:6px 8px;font-size:13px;cursor:pointer}

/* Hero */
.hero{padding:64px 0 36px;text-align:center}
.hero h1{font-size:clamp(28px,5vw,52px);margin:0 0 14px;letter-spacing:-.02em;font-weight:800;background:linear-gradient(180deg,var(--text),color-mix(in oklab,var(--text) 60%,transparent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--text-dim);max-width:680px;margin:0 auto;font-size:17px}

/* Tool grid */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;margin:32px 0 60px}
.tool-card{display:block;padding:18px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);transition:all .18s;color:inherit;position:relative;overflow:hidden}
.tool-card::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,transparent,color-mix(in oklab,var(--accent) 8%,transparent));opacity:0;transition:opacity .2s;pointer-events:none}
.tool-card:hover{border-color:color-mix(in oklab,var(--accent) 50%,var(--border));transform:translateY(-2px);text-decoration:none;box-shadow:var(--shadow)}
.tool-card:hover::before{opacity:1}
.tool-card .tag{display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.06em;color:var(--accent-2);text-transform:uppercase;margin-bottom:8px}
.tool-card .new{color:#0b0d12;background:linear-gradient(135deg,var(--accent),var(--accent-2));padding:2px 7px;border-radius:4px;margin-left:6px}
.tool-card h3{margin:0 0 6px;font-size:16px;letter-spacing:-.01em}
.tool-card p{margin:0;color:var(--text-dim);font-size:13.5px;line-height:1.5}

/* Tool page */
.tool-page{padding:30px 0 60px}
.tool-head{margin-bottom:18px}
.tool-head h1{font-size:clamp(22px,3.4vw,32px);margin:0 0 6px;letter-spacing:-.015em}
.tool-head p{margin:0;color:var(--text-dim);max-width:780px}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--text-dim)}

/* Toolbar */
.toolbar{display:flex;flex-wrap:wrap;gap:8px;padding:10px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;align-items:center}
.toolbar .spacer{flex:1}
.btn{background:var(--surface-2);color:var(--text);border:1px solid var(--border);padding:7px 12px;border-radius:7px;cursor:pointer;font-size:13.5px;font-weight:500;transition:all .12s;display:inline-flex;align-items:center;gap:6px}
.btn:hover{border-color:var(--accent);background:color-mix(in oklab,var(--accent) 8%,var(--surface-2))}
.btn:active{transform:translateY(1px)}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#0b0d12;border-color:transparent;font-weight:600}
.btn.ghost{background:transparent}
.btn.danger{color:var(--err)}
.btn:disabled{opacity:.5;cursor:not-allowed}
select.btn,input.btn{font-family:var(--sans)}

/* Sticky mobile actions */
.sticky-actions{position:sticky;bottom:8px;z-index:20;display:none}
@media(max-width:640px){
  .sticky-actions{display:flex;gap:8px;padding:8px;background:color-mix(in oklab,var(--bg) 90%,transparent);backdrop-filter:blur(8px);border:1px solid var(--border);border-radius:10px;margin-top:10px}
  .sticky-actions .btn{flex:1;justify-content:center;padding:11px}
}

/* IO panes */
.io-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:820px){.io-grid{grid-template-columns:1fr}}
.pane{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;min-height:340px}
.pane-head{display:flex;align-items:center;gap:8px;padding:8px 10px;border-bottom:1px solid var(--border);background:var(--surface-2);font-size:12.5px;color:var(--text-dim);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.pane-head .spacer{flex:1}
.pane textarea,.pane .editor,.pane pre{flex:1;width:100%;min-height:300px;background:transparent;color:var(--text);border:0;outline:0;padding:12px 14px;font-family:var(--mono);font-size:13.5px;resize:vertical;line-height:1.55;tab-size:2;white-space:pre;overflow:auto}
.pane pre{margin:0}
.pane.full textarea,.pane.full .editor{min-height:420px}

/* Status bar */
.status{display:flex;gap:14px;align-items:center;padding:8px 12px;background:var(--surface-2);border:1px solid var(--border);border-top:0;border-radius:0 0 var(--radius) var(--radius);font-size:12.5px;color:var(--text-dim);flex-wrap:wrap}
.status .ok{color:var(--ok)}
.status .err{color:var(--err)}
.status .warn{color:var(--warn)}

/* Forms */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}
.field label{font-size:12.5px;color:var(--text-dim);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.field input[type=text],.field input[type=number],.field input[type=url],.field select,.field textarea{background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:7px;padding:9px 11px;font-size:14px;font-family:var(--sans);outline:none;transition:border .15s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--accent)}
.field textarea{font-family:var(--mono);font-size:13.5px;min-height:80px;resize:vertical}
.row-inline{display:flex;flex-wrap:wrap;gap:10px;align-items:end}
.row-inline .field{flex:1;min-width:140px;margin-bottom:0}

/* Toast */
.toast-host{position:fixed;bottom:18px;left:50%;transform:translateX(-50%);z-index:1000;display:flex;flex-direction:column;gap:8px;pointer-events:none}
.toast{background:var(--surface);color:var(--text);border:1px solid var(--border);border-left:3px solid var(--accent);padding:10px 14px;border-radius:8px;font-size:13.5px;box-shadow:var(--shadow);animation:toast-in .22s ease;pointer-events:auto;max-width:340px}
.toast.ok{border-left-color:var(--ok)}
.toast.err{border-left-color:var(--err)}
@keyframes toast-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* JSON Tree */
.json-tree{font-family:var(--mono);font-size:13.5px;line-height:1.7;padding:12px 14px;overflow:auto}
.json-tree ul{list-style:none;margin:0;padding-left:18px;border-left:1px dashed color-mix(in oklab,var(--border) 80%,transparent)}
.json-tree .toggle{cursor:pointer;display:inline-block;width:14px;color:var(--muted);user-select:none}
.json-tree .key{color:var(--accent-2)}
.json-tree .str{color:#a5e3a5}
.json-tree .num{color:#f0b88a}
.json-tree .bool{color:#f5a3ff}
.json-tree .null{color:var(--muted)}
.json-tree .punc{color:var(--text-dim)}
.json-tree li{position:relative}
.json-tree .copy-node{margin-left:6px;opacity:0;font-size:11px;color:var(--text-dim);background:transparent;border:0;cursor:pointer}
.json-tree li:hover>.copy-node{opacity:1}

/* Diff */
.diff-line{padding:0 12px;font-family:var(--mono);font-size:13.5px;line-height:1.7;white-space:pre}
.diff-line.add{background:color-mix(in oklab,var(--ok) 18%,transparent);color:#bff5cc}
.diff-line.del{background:color-mix(in oklab,var(--err) 18%,transparent);color:#fbc4c4}
.diff-line.mod{background:color-mix(in oklab,var(--warn) 18%,transparent);color:#fde2a7}
.diff-line.eq{color:var(--text-dim)}

/* Regex highlight */
.rx-output{padding:12px 14px;font-family:var(--mono);font-size:13.5px;line-height:1.65;white-space:pre-wrap;word-break:break-word}
.rx-match{background:color-mix(in oklab,var(--accent) 30%,transparent);border-radius:3px;padding:1px 2px}
.rx-g1{background:color-mix(in oklab,var(--accent-2) 35%,transparent)}
.rx-g2{background:color-mix(in oklab,#22c55e 35%,transparent)}
.rx-g3{background:color-mix(in oklab,#f59e0b 35%,transparent)}
.rx-g4{background:color-mix(in oklab,#ef4444 35%,transparent)}

/* JWT colored */
.jwt-h{color:#ff8aa3}.jwt-p{color:#a5d8ff}.jwt-s{color:#c2c2c2}

/* SEO content */
.content{padding:48px 0;border-top:1px solid var(--border);margin-top:36px}
.content h2{font-size:24px;margin:28px 0 12px;letter-spacing:-.01em}
.content h3{font-size:18px;margin:22px 0 8px}
.content p,.content li{color:var(--text-dim);font-size:15px;line-height:1.7}
.content code{background:var(--surface-2);padding:1px 6px;border-radius:4px;color:var(--text)}
.content pre{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:14px;overflow:auto}
.content pre code{background:transparent;padding:0}
.content ul,.content ol{padding-left:22px}
.content a{color:var(--accent-2)}
.related{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;margin-top:14px}
.related a{display:block;padding:12px 14px;background:var(--surface);border:1px solid var(--border);border-radius:8px;font-size:14px;color:var(--text)}
.related a:hover{border-color:var(--accent);text-decoration:none}

/* FAQ */
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:8px;margin-bottom:8px;padding:0}
.faq summary{cursor:pointer;padding:14px 16px;font-weight:600;color:var(--text);list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::after{content:"+";color:var(--text-dim);font-size:20px;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq summary::-webkit-details-marker{display:none}
.faq .a{padding:0 16px 14px;color:var(--text-dim);font-size:14.5px;line-height:1.65}

/* Footer */
.site-footer{border-top:1px solid var(--border);padding:30px 0 40px;color:var(--text-dim);font-size:13.5px;margin-top:40px}
.site-footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px;margin-bottom:18px}
@media(max-width:740px){.site-footer .cols{grid-template-columns:1fr 1fr}}
.site-footer h4{color:var(--text);font-size:13px;text-transform:uppercase;letter-spacing:.06em;margin:0 0 10px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:5px 0}
.site-footer a{color:var(--text-dim)}
.site-footer a:hover{color:var(--text)}
.site-footer .meta{border-top:1px solid var(--border);padding-top:14px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* Utility */
.hide{display:none!important}
.row{display:flex;align-items:center;gap:8px}
.gap-sm{gap:6px}
.muted{color:var(--text-dim)}
.error-box{background:color-mix(in oklab,var(--err) 14%,transparent);border:1px solid color-mix(in oklab,var(--err) 40%,var(--border));color:#ffd1d1;padding:10px 12px;border-radius:8px;font-family:var(--mono);font-size:13px;white-space:pre-wrap}
.badge{display:inline-block;font-size:11px;background:var(--surface-2);border:1px solid var(--border);color:var(--text-dim);padding:2px 7px;border-radius:999px}
.badge.ok{color:var(--ok);border-color:color-mix(in oklab,var(--ok) 35%,var(--border))}
.badge.err{color:var(--err);border-color:color-mix(in oklab,var(--err) 35%,var(--border))}
.kv{display:grid;grid-template-columns:140px 1fr;gap:6px 14px;font-size:14px}
.kv dt{color:var(--text-dim)}
.kv dd{margin:0;color:var(--text);word-break:break-word}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:12px;top:8px;background:var(--surface);padding:8px;border:1px solid var(--accent);border-radius:6px;z-index:100}