/* ==========================================================================
   JavaScript Formatter Online — design system
   Ink editor hero + paper content, Source Serif headings, Plex Sans body,
   Plex Mono for code & UI chrome.
   ========================================================================== */

:root{
  --ink:        #12141c;
  --ink-raised: #1b1f2a;
  --ink-line:   #2b2f3d;
  --ink-text:   #e9eaee;
  --ink-dim:    #9aa0b4;

  --paper:      #fbfaf7;
  --paper-2:    #f2f0ea;
  --paper-line: #e3e0d5;
  --ink-dark:   #1b1e29;
  --dim:        #5c6070;

  --amber:      #f2a93c;
  --amber-dark: #c9821f;
  --mint:       #6fc9a0;
  --red:        #e0654f;

  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans:  "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --mono:  "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --radius: 3px;
  --max: 1180px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--sans);
  color: var(--ink-dark);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; }
:focus-visible{ outline: 2px solid var(--amber); outline-offset: 2px; }

.wrap{ max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- Top bar ---------- */
.topbar{
  background: var(--ink);
  border-bottom: 1px solid var(--ink-line);
}
.topbar .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height: 64px;
}
.brand{
  font-family: var(--mono);
  font-size: 15px;
  color: var(--ink-text);
  text-decoration:none;
  display:flex; align-items:center; gap:8px;
  letter-spacing: 0.01em;
}
.brand .dot{ color: var(--amber); }
nav.primary{ display:flex; gap: 28px; }
nav.primary a{
  color: var(--ink-dim);
  text-decoration:none;
  font-size: 14.5px;
  font-family: var(--sans);
  transition: color .15s ease;
}
nav.primary a:hover, nav.primary a.active{ color: var(--ink-text); }
.nav-toggle{ display:none; }

@media (max-width: 760px){
  nav.primary{
    position: fixed; inset: 64px 0 auto 0; background: var(--ink);
    flex-direction: column; gap:0; padding: 8px 24px 20px;
    border-bottom: 1px solid var(--ink-line);
    transform: translateY(-8px); opacity:0; pointer-events:none;
    transition: all .18s ease;
  }
  nav.primary.open{ transform: translateY(0); opacity:1; pointer-events:auto; }
  nav.primary a{ padding: 12px 0; border-bottom: 1px solid var(--ink-line); }
  .nav-toggle{
    display:block; background:none; border:none; color:var(--ink-text);
    font-size: 26px; line-height:1; cursor:pointer; padding:4px 8px;
  }
}

/* ---------- Hero / tool section (dark) ---------- */
.hero{
  background: var(--ink);
  color: var(--ink-text);
  padding: 56px 0 64px;
}
.hero-head{ max-width: 760px; margin-bottom: 34px; }
.eyebrow-plain{
  font-family: var(--mono);
  font-size: 13px;
  color: var(--amber);
  margin: 0 0 14px;
}
h1.hero-title{
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1.12;
  margin: 0 0 16px;
  color: #fff;
}
.hero-sub{
  font-size: 17px;
  color: var(--ink-dim);
  max-width: 620px;
  margin: 0;
}

/* ---------- Tool card ---------- */
.tool{
  background: var(--ink-raised);
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  overflow: hidden;
}
.tool-toolbar{
  display:flex; flex-wrap:wrap; align-items:center; gap: 10px 14px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--ink-line);
  background: #171a23;
}
.tool-toolbar .group{ display:flex; align-items:center; gap:8px; }
.tool-toolbar label{
  font-family: var(--mono); font-size: 12.5px; color: var(--ink-dim);
}
.tool-toolbar select{
  background: var(--ink); color: var(--ink-text);
  border: 1px solid var(--ink-line); border-radius: var(--radius);
  font-family: var(--mono); font-size: 12.5px; padding: 6px 8px;
}
.spacer{ flex: 1; }
.btn{
  font-family: var(--sans);
  font-size: 14px; font-weight: 600;
  padding: 9px 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .06s ease, background .15s ease, border-color .15s ease;
}
.btn:active{ transform: translateY(1px); }
.btn-amber{ background: var(--amber); color: #241a05; }
.btn-amber:hover{ background: var(--amber-dark); }
.btn-ghost{ background: transparent; color: var(--ink-text); border-color: var(--ink-line); }
.btn-ghost:hover{ border-color: var(--ink-dim); }
.btn-sm{ padding: 6px 11px; font-size: 12.5px; }

.tool-panes{
  display:grid; grid-template-columns: 1fr 1fr;
}
@media (max-width: 860px){ .tool-panes{ grid-template-columns: 1fr; } }

.pane{ display:flex; flex-direction:column; min-width:0; }
.pane + .pane{ border-left: 1px solid var(--ink-line); }
@media (max-width: 860px){ .pane + .pane{ border-left:none; border-top:1px solid var(--ink-line); } }
.pane-label{
  font-family: var(--mono); font-size: 12px; color: var(--ink-dim);
  padding: 10px 16px; border-bottom: 1px solid var(--ink-line);
  display:flex; justify-content:space-between; align-items:center;
}
textarea.code, pre.code{
  margin:0; width:100%; min-height: 340px; resize: vertical;
  background: var(--ink); color: var(--ink-text);
  border:none; padding: 16px; font-family: var(--mono);
  font-size: 13.5px; line-height: 1.6; tab-size: 2;
  white-space: pre; overflow: auto;
}
textarea.code:focus{ outline:none; box-shadow: inset 0 0 0 2px var(--amber); }
.pane-foot{
  display:flex; justify-content:space-between; gap: 10px;
  padding: 10px 16px; border-top:1px solid var(--ink-line);
  font-family: var(--mono); font-size: 11.5px; color: var(--ink-dim);
}
.status-ok{ color: var(--mint); }
.status-err{ color: var(--red); }

/* ---------- Ad slots ---------- */
.ad-slot{
  border: 1px dashed var(--paper-line);
  background: var(--paper-2);
  color: var(--dim);
  font-family: var(--mono);
  font-size: 12px;
  text-align:center;
  padding: 14px;
  border-radius: var(--radius);
  margin: 28px 0;
}
.ad-slot.dark{
  border-color: var(--ink-line); background: var(--ink-raised); color: var(--ink-dim);
}

/* ---------- Content sections (light) ---------- */
.section{ padding: 56px 0; }
.section-tight{ padding: 36px 0; }
.section h2{
  font-family: var(--serif); font-weight:600;
  font-size: clamp(24px, 3vw, 32px);
  margin: 0 0 8px; color: var(--ink-dark);
}
.section .lede{ color: var(--dim); max-width: 640px; margin: 0 0 30px; font-size: 16px; }

.divider{ border:none; border-top:1px solid var(--paper-line); margin:0; }

/* Feature spec-list (not cards) */
.feature-list{ display:grid; grid-template-columns: repeat(2, 1fr); gap: 0; border-top:1px solid var(--paper-line); }
@media (max-width: 700px){ .feature-list{ grid-template-columns: 1fr; } }
.feature-row{
  padding: 20px 0; border-bottom: 1px solid var(--paper-line);
  padding-right: 28px;
}
.feature-row:nth-child(odd){ padding-right: 28px; }
.feature-row h3{
  font-family: var(--mono); font-size: 14.5px; font-weight:600;
  margin: 0 0 6px; color: var(--ink-dark);
}
.feature-row h3 .num{ color: var(--amber-dark); margin-right: 8px; }
.feature-row p{ margin:0; color: var(--dim); font-size: 14.5px; }

/* Article typography */
.prose{ max-width: 720px; font-size: 17px; color: #262a35; }
.prose h2{ font-family: var(--serif); font-size: 26px; margin: 40px 0 14px; }
.prose h3{ font-family: var(--sans); font-weight:700; font-size: 19px; margin: 28px 0 10px; }
.prose p{ margin: 0 0 18px; }
.prose ul, .prose ol{ margin: 0 0 18px; padding-left: 22px; }
.prose li{ margin-bottom: 8px; }
.prose code{
  font-family: var(--mono); background: var(--paper-2); padding: 2px 6px;
  border-radius: 3px; font-size: 0.9em;
}
.prose pre{
  background: var(--ink); color: var(--ink-text); padding: 16px;
  border-radius: var(--radius); overflow-x:auto; font-family: var(--mono);
  font-size: 13.5px; line-height:1.6;
}
.prose a{ color: var(--amber-dark); text-decoration: underline; }
.prose blockquote{
  border-left: 3px solid var(--amber); margin: 22px 0; padding: 4px 0 4px 18px;
  color: var(--dim); font-style: italic;
}
.article-meta{
  font-family: var(--mono); font-size: 12.5px; color: var(--dim);
  margin-bottom: 10px;
}
.breadcrumb{
  font-family: var(--mono); font-size: 12.5px; color: var(--dim); margin-bottom: 18px;
}
.breadcrumb a{ color: var(--dim); text-decoration:none; border-bottom:1px solid var(--paper-line); }

.related{
  border-top: 1px solid var(--paper-line); margin-top: 48px; padding-top: 28px;
}
.related h3{ font-family: var(--mono); font-size: 13px; color: var(--dim); margin: 0 0 16px; text-transform: none; }
.related ul{ list-style:none; margin:0; padding:0; display:grid; gap: 10px; }
.related a{
  display:block; text-decoration:none; color: var(--ink-dark);
  font-weight: 600; padding: 12px 14px; border: 1px solid var(--paper-line);
  border-radius: var(--radius); font-size: 15px;
  transition: border-color .15s ease, background .15s ease;
}
.related a:hover{ border-color: var(--amber-dark); background: var(--paper-2); }

/* Blog index grid */
.post-list{ border-top: 1px solid var(--paper-line); }
.post-row{
  display:flex; justify-content:space-between; gap: 20px;
  padding: 22px 0; border-bottom: 1px solid var(--paper-line);
  text-decoration:none; color: inherit;
  flex-wrap: wrap;
}
.post-row h3{ font-family: var(--serif); font-size: 19px; margin:0 0 6px; color: var(--ink-dark); }
.post-row p{ margin:0; color: var(--dim); font-size: 14.5px; max-width: 560px; }
.post-row .arrow{ font-family: var(--mono); color: var(--amber-dark); align-self:center; }

/* CTA band */
.cta-band{
  background: var(--ink); color: var(--ink-text);
  padding: 44px 0; text-align:left;
}
.cta-band h2{ font-family: var(--serif); font-size: 26px; margin:0 0 6px; color:#fff; }
.cta-band p{ color: var(--ink-dim); margin: 0 0 20px; }

/* Footer */
footer{
  background: var(--ink); color: var(--ink-dim); border-top: 1px solid var(--ink-line);
  padding: 40px 0 26px; font-size: 14px;
}
.footer-grid{
  display:grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 28px; margin-bottom: 28px;
}
@media (max-width: 700px){ .footer-grid{ grid-template-columns: 1fr 1fr; } }
.footer-grid h4{ color: var(--ink-text); font-size: 13px; font-family: var(--mono); margin: 0 0 12px; }
.footer-grid ul{ list-style:none; margin:0; padding:0; }
.footer-grid li{ margin-bottom: 9px; }
.footer-grid a{ color: var(--ink-dim); text-decoration:none; }
.footer-grid a:hover{ color: var(--ink-text); }
.footer-bottom{
  border-top: 1px solid var(--ink-line); padding-top: 18px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
  font-size: 13px;
}

/* Simple static pages (about/contact/privacy/terms) */
.static-page .prose{ max-width: 760px; }

/* utility */
.mt-0{margin-top:0} .mb-0{margin-bottom:0}
.visually-hidden{ position:absolute; width:1px;height:1px; overflow:hidden; clip:rect(0 0 0 0); }