/* =========================================================================
   CanonicalTag.com — Design System
   Modern technical / dev-tool theme · "Blue & Slate" palette
   ========================================================================= */

:root{
  /* Palette — blue + gray */
  --navy:#0f2748;        /* darkest — hero, footer, headings on light */
  --navy-2:#14335f;
  --navy-3:#1d4173;
  --blue:#1f6feb;        /* bright accent / primary CTA */
  --blue-deep:#1558c0;
  --blue-soft:#e7f0ff;   /* light blue tint */
  --sky:#3b8bff;
  --slate:#5a6b82;       /* mid gray */
  --slate-2:#7c8aa0;
  --mist:#f4f6fb;        /* page background (cool near-white) */
  --paper:#ffffff;       /* card background */
  --ink:#1b2534;         /* body text (charcoal-navy) */
  --ink-soft:#546174;    /* secondary text (slate) */
  --line:#e3e9f2;        /* borders */
  --line-dk:#cfd8e6;
  /* functional */
  --warn:#c0392b;        /* issue / diagnostic accent */
  --warn-soft:#fdecea;
  --ok:#1f8a5b;          /* good practice */
  --ok-soft:#e6f5ee;
  /* code */
  --code-bg:#0f2036;     /* dark code block */
  --code-ink:#dbe7ff;
  --code-key:#7fd1ff;    /* attribute names */
  --code-str:#9be7a8;    /* strings */
  --code-tag:#ff9d7a;    /* tag names */
  --code-mut:#7f93b0;

  /* Type */
  --display:"Space Grotesk","Segoe UI",system-ui,Arial,sans-serif;  /* headings */
  --body:"Inter","Segoe UI",system-ui,Arial,sans-serif;             /* body */
  --sans:"Inter","Segoe UI",system-ui,Arial,sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

  --maxw:1180px;
  --radius:10px;
  --shadow:0 1px 2px rgba(15,39,72,.06),0 12px 34px rgba(15,39,72,.08);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--mist);color:var(--ink);
  font-family:var(--body);font-size:17px;line-height:1.7;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--blue-deep);text-decoration:none}
a:hover{text-decoration:underline}

h1,h2,h3,h4{font-family:var(--display);color:var(--navy);line-height:1.16;font-weight:700;margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(2rem,3.8vw,3.05rem)}
h2{font-size:clamp(1.5rem,2.5vw,2.1rem)}
h3{font-size:1.25rem}
p{margin:0 0 1.1em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{font-family:var(--sans);text-transform:uppercase;letter-spacing:.16em;
  font-size:.73rem;font-weight:700;color:var(--blue)}
.lede{font-size:1.2rem;color:var(--ink-soft)}
.rule{width:60px;height:3px;background:var(--blue);border:0;border-radius:3px;margin:1.1em 0}
.rule.center{margin-left:auto;margin-right:auto}

/* ---------- Header ---------- */
.topbar{background:rgba(255,255,255,.92);backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;
  gap:24px;padding:11px 24px;max-width:var(--maxw);margin:0 auto}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand img{height:52px;width:52px;flex:0 0 auto}
.brand>span{display:flex;flex-direction:column;justify-content:center}
.brand-name{display:block;font-family:var(--display);font-weight:700;font-size:1.32rem;
  color:var(--navy);line-height:1;letter-spacing:-.02em}
.brand-tag{display:block;font-family:var(--sans);font-size:.62rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--slate);margin-top:5px;white-space:nowrap;font-weight:600}
.nav{display:flex;gap:20px;align-items:center;font-family:var(--sans);font-size:.95rem}
.nav a{color:var(--navy);font-weight:600}
.nav a:hover{color:var(--blue);text-decoration:none}

/* ---------- Breadcrumbs ---------- */
.crumbs{font-family:var(--sans);font-size:.82rem;color:var(--ink-soft);padding:16px 0 0}
.crumbs a{color:var(--blue-deep)}
.crumbs span{margin:0 8px;color:var(--line-dk)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;
  background:linear-gradient(155deg,var(--navy),var(--navy-2) 60%,var(--navy-3));
  color:#eaf1fb;border-bottom:1px solid #0a1c36}
.hero::before{content:"";position:absolute;inset:0;opacity:.5;
  background:radial-gradient(650px 300px at 82% -10%,rgba(59,139,255,.35),transparent 60%);}
.hero .container{position:relative;padding-top:62px;padding-bottom:62px}
.hero h1{color:#fff}
.hero .eyebrow{color:var(--sky)}
.hero .lede{color:#c6d6ee;max-width:46rem}
.hero .badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.hero .badge{background:rgba(120,170,255,.18);color:#dbe8fb;border:1px solid rgba(120,170,255,.3)}
.hero .tagline{font-size:1.18rem;color:#c6d6ee;max-width:46rem;margin:.4em 0 0}

/* ---------- Badges / chips ---------- */
.badge{display:inline-block;font-family:var(--sans);font-size:.72rem;font-weight:700;
  letter-spacing:.03em;text-transform:uppercase;padding:5px 12px;border-radius:100px;
  background:var(--blue-soft);color:var(--blue-deep)}
.chip{display:inline-block;font-family:var(--sans);font-size:.73rem;font-weight:600;
  background:var(--blue-soft);color:var(--blue-deep);border-radius:100px;padding:4px 12px}
.chip.issue{background:var(--warn-soft);color:#a5342a}
.chip.gsc{background:#fef3e2;color:#a8631a}
.chip.conflict{background:var(--warn-soft);color:#a5342a}
.chip.platform{background:var(--blue-soft);color:var(--blue-deep)}
.chip.cms{background:var(--blue-soft);color:var(--blue-deep)}
.chip.ecommerce{background:var(--ok-soft);color:#17734c}
.chip.framework{background:#eee9ff;color:#5b45c9}
.chip.guide{background:#eef1f6;color:#475569}

/* ---------- Buttons ---------- */
.btn{display:inline-block;font-family:var(--sans);font-weight:700;font-size:.95rem;
  padding:13px 24px;border-radius:8px;text-decoration:none;transition:.15s;cursor:pointer;border:0}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 6px 16px rgba(31,111,235,.28)}
.btn-primary:hover{background:var(--blue-deep);color:#fff}
.btn-ghost{border:1.5px solid rgba(255,255,255,.6);color:#fff}
.btn-ghost:hover{background:#fff;color:var(--navy)}
.btn-slate{background:var(--navy);color:#fff}
.btn-slate:hover{background:var(--navy-2);color:#fff}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:1.5em}

/* ---------- Section ---------- */
section{padding:56px 0}
.section-head{max-width:730px;margin:0 auto 40px}
.section-head.center{text-align:center}
.section-head.center .rule{margin:14px auto}
.band-navy{background:var(--navy);color:#c6d6ee}
.band-navy h2{color:#fff}
.band-navy .eyebrow{color:var(--sky)}
.band-navy a{color:var(--sky)}
.band-mist{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* ---------- Card grid ---------- */
.grid{display:grid;gap:22px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.grid.cols-3,.grid.cols-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}}

.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:.18s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 18px rgba(15,39,72,.12),0 24px 48px rgba(15,39,72,.10);border-color:var(--line-dk)}
.card a{text-decoration:none;color:inherit;display:flex;flex-direction:column;height:100%}
.card a:hover{text-decoration:none}
.card-art{aspect-ratio:16/9;background:var(--blue-soft);border-bottom:1px solid var(--line);position:relative}
.card-art svg,.card-art img{width:100%;height:100%;object-fit:cover;display:block}
.card-tag{position:absolute;left:12px;top:12px;z-index:2}
.card-body{padding:17px 20px 20px}
.card-body h3{margin:0 0 .2em;font-size:1.18rem;color:var(--navy)}
.card-cat{font-family:var(--sans);font-size:.71rem;text-transform:uppercase;
  letter-spacing:.1em;color:var(--slate);font-weight:700}
.card-desc{font-size:.94rem;color:var(--ink-soft);margin:.5em 0 0;line-height:1.55}
.card-meta{font-family:var(--sans);font-size:.82rem;color:var(--blue-deep);font-weight:700;margin-top:.7em}

/* ---------- Quick facts panel ---------- */
.facts{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px 24px}
.facts h3{font-family:var(--sans);text-transform:uppercase;letter-spacing:.1em;
  font-size:.76rem;color:var(--blue-deep);margin:0 0 14px;font-weight:700}
.facts dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:11px 16px}
.facts dt{font-family:var(--sans);font-size:.77rem;font-weight:700;color:var(--ink-soft);
  text-transform:uppercase;letter-spacing:.04em;align-self:start;padding-top:2px}
.facts dd{margin:0;font-size:.98rem;color:var(--ink)}
.facts .btn{width:100%;text-align:center;margin-top:18px}

/* ---------- Article body ---------- */
.article{display:grid;grid-template-columns:1fr 320px;gap:48px;align-items:start;padding:48px 0}
.article>*{min-width:0}   /* allow grid tracks to shrink below wide children (e.g. <pre>) */
.article .prose{max-width:47rem}
.prose{font-size:1.05rem}
.prose h2{margin-top:1.8em;color:var(--navy);scroll-margin-top:80px}
.prose h2:first-child{margin-top:0}
.prose h3{margin-top:1.5em;color:var(--navy-2)}
.prose ul,.prose ol{padding-left:1.3em;margin:0 0 1.1em}
.prose li{margin-bottom:.5em}
.prose strong{color:var(--navy-2)}
.aside{position:sticky;top:84px;display:flex;flex-direction:column;gap:22px}
@media(max-width:900px){.article{grid-template-columns:1fr}.aside{position:static}}

.callout{background:var(--blue-soft);border-left:4px solid var(--blue);
  padding:15px 20px;border-radius:0 var(--radius) var(--radius) 0;margin:1.5em 0;font-size:.98rem}
.callout strong{color:var(--blue-deep)}
.callout.warn{background:var(--warn-soft);border-left-color:var(--warn)}
.callout.warn strong{color:var(--warn)}
.callout.ok{background:var(--ok-soft);border-left-color:var(--ok)}
.callout.ok strong{color:var(--ok)}

/* ---------- Code ---------- */
code{font-family:var(--mono);font-size:.9em;background:#eef2f8;color:#0b2a52;
  padding:.13em .4em;border-radius:5px;border:1px solid #e0e7f1;word-break:break-word}
.prose pre{background:var(--code-bg);color:var(--code-ink);font-family:var(--mono);
  font-size:.9rem;line-height:1.6;padding:18px 20px;border-radius:var(--radius);
  overflow-x:auto;max-width:100%;margin:1.4em 0;border:1px solid #0a1c33;-webkit-overflow-scrolling:touch}
.prose pre code{background:none;border:0;padding:0;color:inherit;font-size:.9rem;white-space:pre}
.prose pre .t{color:var(--code-tag)}   /* tag */
.prose pre .a{color:var(--code-key)}   /* attribute */
.prose pre .s{color:var(--code-str)}   /* string */
.prose pre .c{color:var(--code-mut)}   /* comment */
figure.code{margin:1.4em 0}
figure.code figcaption{font-family:var(--sans);font-size:.76rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.06em;color:var(--slate);margin-bottom:7px}

/* ---------- FAQ ---------- */
.faq-item{border-top:1px solid var(--line);padding:18px 0}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item h3{font-size:1.1rem;margin:0 0 .35em;color:var(--navy)}
.faq-item p{margin:0 0 .6em;color:var(--ink-soft);font-size:1rem}
.faq-item p:last-child{margin-bottom:0}

/* ---------- Region / topic blocks ---------- */
.region{margin-bottom:44px}
.region-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  border-bottom:2px solid var(--line);padding-bottom:10px;margin-bottom:22px;flex-wrap:wrap}
.region-head h2{margin:0;font-size:1.4rem}
.region-head span{font-family:var(--sans);font-size:.85rem;color:var(--slate);font-weight:600}

/* ---------- Strip / CTA ---------- */
.strip{background:linear-gradient(120deg,var(--blue-deep),var(--blue))}
.strip h2,.strip .lede{color:#fff}
.strip .eyebrow{color:#cfe0ff}

/* ---------- Tools placeholder ---------- */
.tool-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:26px 26px 24px;display:flex;flex-direction:column;position:relative}
.tool-card .tool-ico{width:46px;height:46px;border-radius:11px;background:var(--blue-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.tool-card h3{margin:0 0 .3em;font-size:1.24rem}
.tool-card p{font-size:.96rem;color:var(--ink-soft);margin:0 0 1em}
.tool-card .soon{position:absolute;top:18px;right:18px;font-family:var(--sans);font-size:.66rem;
  font-weight:700;text-transform:uppercase;letter-spacing:.09em;color:var(--slate);
  background:#eef1f6;border:1px solid var(--line);padding:4px 10px;border-radius:100px}
.tool-card .tool-meta{margin-top:auto;font-family:var(--sans);font-size:.82rem;font-weight:700;color:var(--slate-2)}

/* ---------- Footer ---------- */
.footer{background:var(--navy);color:#9fb2cd;font-family:var(--body);margin-top:0}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:54px 24px 26px;
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px}
.footer h4{color:#fff;font-family:var(--sans);font-size:.8rem;text-transform:uppercase;
  letter-spacing:.12em;margin:0 0 15px}
.footer a{color:#a7b8d1;display:block;margin-bottom:9px;font-size:.94rem}
.footer a:hover{color:#fff}
.footer .brand-name{color:#fff;font-size:1.3rem}
.footer-tag{color:#8496b3;font-size:.92rem;margin-top:10px;max-width:27rem}
.footer-tag a{display:inline;margin:0}
.footer-base{border-top:1px solid #24406a;margin-top:20px}
.footer-base .container{padding:18px 24px;display:flex;justify-content:space-between;
  flex-wrap:wrap;gap:10px;font-family:var(--sans);font-size:.82rem;color:#8496b3}
.footer-base a{display:inline;margin:0;color:#a7b8d1}
.footer-base a:hover{color:#fff}
.footer-base strong{color:#c6d6ee;font-weight:600}
@media(max-width:820px){.footer-inner{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.footer-inner{grid-template-columns:1fr}}

/* ---------- Utility ---------- */
.text-center{text-align:center}
.prose-narrow{max-width:44rem;margin:0 auto}

/* ---------- Accessibility & mobile nav ---------- */
.skip{position:absolute;left:-999px;top:0;background:var(--blue);color:#fff;padding:10px 16px;z-index:100;border-radius:0 0 var(--radius) 0}
.skip:focus{left:0}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:44px;height:44px;
  flex-direction:column;justify-content:center;gap:5px;padding:8px}
.nav-toggle span{display:block;height:2px;background:var(--navy);border-radius:2px;transition:.2s}
.topbar.open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.topbar.open .nav-toggle span:nth-child(2){opacity:0}
.topbar.open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media(max-width:600px){
  .brand-tag{white-space:normal}          /* let the header tagline wrap instead of overflowing */
  .hero .container{padding-top:44px;padding-bottom:46px}
}
@media(max-width:820px){
  .nav-toggle{display:flex}
  .topbar{position:static}
  .topbar-inner{flex-wrap:wrap}
  .nav{display:none;width:100%;flex-direction:column;align-items:stretch;gap:0;padding-top:8px}
  .topbar.open .nav{display:flex}
  .nav a{padding:13px 4px;border-top:1px solid var(--line)}
}

/* ---------- Tool: canonical checker ---------- */
.ctool-form{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px 24px;margin:0 0 22px}
.ctool-form label{display:block;font-family:var(--sans);font-size:.8rem;font-weight:700;
  letter-spacing:.03em;text-transform:uppercase;color:var(--ink-soft);margin:0 0 8px}
.ctool-row{display:flex;gap:12px;flex-wrap:wrap;align-items:stretch}
.ctool-row input[type=url]{flex:1 1 340px;font-family:var(--body);font-size:1.2rem;line-height:1.4;
  color:var(--ink);border:1px solid var(--line-dk);border-radius:8px;padding:16px 18px;background:#fff}
.ctool-row input[type=url]::placeholder{color:var(--slate-2)}
.ctool-row input[type=url]:focus{outline:2px solid var(--blue);border-color:var(--blue)}
.ctool-row .btn{border:0;white-space:nowrap;font-size:1.1rem;padding:16px 30px;line-height:1.4}
.ctool-note{font-family:var(--sans);font-size:.82rem;color:var(--slate);margin:12px 2px 0}
.ctool-result{margin:8px 0 0}
.ctool-result .facts dd code{word-break:break-all}
.cg-out figure.code{margin:0 0 18px}
.cg-out figure.code figcaption{display:flex;justify-content:space-between;align-items:center;gap:12px}
.cg-out pre{margin:0;white-space:pre-wrap;word-break:break-all}
.cg-copy{font-family:var(--sans);font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;
  color:var(--blue-deep);background:var(--blue-soft);border:1px solid #cfe0ff;border-radius:6px;
  padding:6px 13px;cursor:pointer;flex:0 0 auto}
.cg-copy:hover{background:#d8e7ff}
.cg-copy.copied{color:var(--ok);background:var(--ok-soft);border-color:#bfe6d1}
.cv-form label{display:block;font-family:var(--sans);font-size:.9rem;font-weight:700;letter-spacing:.02em;
  color:var(--ink-soft);margin:0 0 10px}
.cv-form label.mt{margin-top:22px}
.cv-form textarea{width:100%;min-height:210px;font-family:var(--mono);font-size:1.05rem;line-height:1.6;
  color:var(--ink);border:1px solid var(--line-dk);border-radius:8px;padding:16px 18px;background:#fff;resize:vertical}
.cv-form textarea:focus{outline:2px solid var(--blue);border-color:var(--blue)}
.cv-form input[type=url]{width:100%;font-family:var(--body);font-size:1.2rem;line-height:1.4;color:var(--ink);
  border:1px solid var(--line-dk);border-radius:8px;padding:16px 18px;background:#fff}
.cv-form input[type=url]::placeholder{color:var(--slate-2)}
.cv-form input[type=url]:focus{outline:2px solid var(--blue);border-color:var(--blue)}
.cv-form .btn{margin-top:20px;border:0;font-size:1.1rem;padding:16px 32px}
.bulk-wrap{overflow-x:auto;margin:0 0 18px}
.bulk-table{width:100%;border-collapse:collapse;font-size:.92rem;background:var(--paper);
  border:1px solid var(--line);border-radius:10px;overflow:hidden}
.bulk-table th,.bulk-table td{text-align:left;padding:10px 13px;border-bottom:1px solid var(--line);vertical-align:top}
.bulk-table th{font-family:var(--sans);font-size:.7rem;text-transform:uppercase;letter-spacing:.05em;
  color:var(--ink-soft);background:var(--mist);white-space:nowrap}
.bulk-table td code{font-size:.82rem;word-break:break-all}
.bulk-table tbody tr:last-child td{border-bottom:0}
.bulk-table tbody tr:nth-child(even){background:#fafbfe}
.hf-row{display:flex;gap:10px;margin:0 0 10px;align-items:center}
.hf-row input{font-family:var(--body);font-size:1.05rem;color:var(--ink);border:1px solid var(--line-dk);
  border-radius:8px;padding:12px 14px;background:#fff;width:100%}
.hf-row input.hf-code{flex:0 0 140px;font-family:var(--mono);font-size:.98rem}
.hf-row input.hf-url{flex:1 1 auto}
.hf-row input:focus{outline:2px solid var(--blue);border-color:var(--blue)}
.hf-remove{flex:0 0 auto;background:none;border:0;color:var(--slate-2);cursor:pointer;font-size:1.5rem;
  line-height:1;padding:4px 10px;border-radius:6px}
.hf-remove:hover{color:var(--warn);background:var(--warn-soft)}
.hf-add{background:var(--blue-soft);color:var(--blue-deep);border:1px solid #cfe0ff;border-radius:8px;
  font-family:var(--sans);font-weight:700;font-size:.9rem;padding:10px 16px;cursor:pointer;margin-top:4px}
.hf-add:hover{background:#d8e7ff}
@media(max-width:560px){.hf-row{flex-wrap:wrap}.hf-row input.hf-code,.hf-row input.hf-url{flex:1 1 100%}}
@media(max-width:520px){.ctool-row input[type=url],.ctool-row .btn{flex:1 1 100%}}

/* ---------- Contact form ---------- */
.contact-form{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:26px 28px;margin:1.6em 0;display:flex;flex-direction:column}
.contact-form label{font-family:var(--sans);font-size:.8rem;font-weight:700;letter-spacing:.03em;
  text-transform:uppercase;color:var(--ink-soft);margin:14px 0 6px}
.contact-form label:first-child{margin-top:0}
.contact-form input,.contact-form textarea{font-family:var(--body);font-size:1rem;color:var(--ink);
  border:1px solid var(--line-dk);border-radius:8px;padding:11px 14px;background:#fff;width:100%}
.contact-form input:focus,.contact-form textarea:focus{outline:2px solid var(--blue);border-color:var(--blue)}
.contact-form textarea{resize:vertical;min-height:130px}
.contact-form button{margin-top:20px;align-self:flex-start;border:0}
.contact-form .form-note{font-family:var(--sans);font-size:.82rem;color:var(--ink-soft);margin:14px 0 0}