/* ---------- Design tokens (matched to thecrazyprogrammer.com) ---------- */
:root {
  --color-primary: #0170B9;
  --color-primary-dark: #015a92;
  --color-text: #3a3a3a;
  --color-text-muted: #4B4F58;
  --color-bg: #ffffff;
  --color-bg-light: #F5F5F5;
  --color-border: #E5E5E5;
  --color-success: #1a7f37;
  --color-danger: #c0392b;
  --font-body: Verdana, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --wrap: 1120px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
}
img { max-width: 100%; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

h1, h2, h3, h4 { color: var(--color-text); line-height: 1.25; font-weight: 700; }
h1 { font-size: 2.1rem; margin: .2em 0 .3em; }
h2 { font-size: 1.5rem; margin: 1.6em 0 .6em; }
h3 { font-size: 1.15rem; margin: 1.4em 0 .5em; }
p { margin: 0 0 1em; }
code { font-family: var(--font-mono); background: var(--color-bg-light); padding: .15em .4em; border-radius: 4px; font-size: .9em; }

/* ---------- Header ---------- */
.site-header { border-bottom: 1px solid var(--color-border); background: #fff; position: sticky; top: 0; z-index: 50; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-size: 1.2rem; font-weight: 700; color: var(--color-text); letter-spacing: -.2px; display: inline-flex; align-items: center; }
.logo span { color: var(--color-primary); }
.logo:hover { text-decoration: none; }
.logo img { display: block; height: 42px; width: auto; }
.main-nav { display: flex; gap: 28px; }
.main-nav a { color: var(--color-text-muted); font-weight: 600; font-size: .95rem; }
.main-nav a.active, .main-nav a:hover { color: var(--color-primary); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 0; width: 32px; height: 32px; padding: 0; cursor: pointer; }
.nav-toggle span { display: block; width: 100%; height: 2px; background: var(--color-text); margin: 6px 0; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { background: var(--color-bg-light); border-bottom: 1px solid var(--color-border); font-size: .85rem; }
.breadcrumb .wrap { padding-top: 10px; padding-bottom: 10px; color: var(--color-text-muted); }
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb .sep { margin: 0 8px; color: #999; }
.breadcrumb [aria-current="page"] { color: var(--color-text); font-weight: 600; }

/* ---------- Hero / tool header ---------- */
.tool-hero { padding: 40px 0 10px; }
.tool-hero .eyebrow { text-transform: uppercase; letter-spacing: .06em; font-size: .78rem; font-weight: 700; color: var(--color-primary); }
.tool-hero p.lead { font-size: 1.1rem; color: var(--color-text-muted); max-width: 760px; }

/* ---------- Tool app panel ---------- */
.tool-app { background: var(--color-bg-light); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 20px; margin: 24px auto 40px; }
.tool-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 760px) { .tool-grid { grid-template-columns: 1fr; } }
.tool-panel { display: flex; flex-direction: column; }
.tool-panel label { font-weight: 700; font-size: .85rem; margin-bottom: 6px; color: var(--color-text-muted); }
.tool-panel textarea, .tool-panel .output-box {
  width: 100%; min-height: 320px; resize: vertical;
  font-family: var(--font-mono); font-size: .88rem; line-height: 1.5;
  border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 12px; background: #fff; color: var(--color-text);
  white-space: pre; overflow: auto;
}
.tool-panel textarea:focus, .tool-panel .output-box:focus { outline: 2px solid var(--color-primary); outline-offset: -1px; }
.tool-panel-single textarea { min-height: 420px; }
.tool-panel-output-full { margin-top: 16px; }
.tool-options select { font-family: var(--font-body); font-size: .88rem; padding: 8px 10px; border: 1px solid var(--color-border); border-radius: var(--radius); min-width: 220px; background: #fff; }
.tool-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0 4px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-body); font-size: .9rem; font-weight: 700;
  padding: 10px 18px; border-radius: var(--radius); border: 1px solid transparent;
  cursor: pointer; background: var(--color-primary); color: #fff;
}
.btn:hover { background: var(--color-primary-dark); text-decoration: none; }
.btn.secondary { background: #fff; color: var(--color-text); border-color: var(--color-border); }
.btn.secondary:hover { background: var(--color-bg-light); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.tool-options { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; margin-bottom: 4px; font-size: .88rem; color: var(--color-text-muted); }
.tool-options label { display: flex; align-items: center; gap: 6px; cursor: pointer; }

.status-msg { margin-top: 12px; padding: 10px 14px; border-radius: var(--radius); font-size: .88rem; display: none; }
.status-msg.show { display: block; }
.status-msg.error { background: #fdecea; color: var(--color-danger); border: 1px solid #f5c6cb; }
.status-msg.success { background: #eaf7ee; color: var(--color-success); border: 1px solid #c3e6cb; }
.status-msg.warning { background: #fff8e1; color: #8a6300; border: 1px solid #ffe082; }

/* File upload + extra text field (converter tools) */
.file-input { width: 100%; padding: 10px 12px; margin-bottom: 8px; border: 1px dashed var(--color-border); border-radius: var(--radius); background: #fff; font-size: .85rem; font-family: var(--font-body); }
.file-hint { font-size: .8rem; color: var(--color-text-muted); margin: 0 0 8px; }
.tool-options input[type="text"] { font-family: var(--font-mono); font-size: .88rem; padding: 8px 10px; border: 1px solid var(--color-border); border-radius: var(--radius); min-width: 220px; }
.tool-options label.field-label { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--color-text-muted); cursor: default; }

/* JSON tree viewer */
.json-tree { font-family: var(--font-mono); font-size: .88rem; }
.json-tree ul { list-style: none; margin: 0; padding-left: 20px; border-left: 1px dashed var(--color-border); }
.json-tree > ul { padding-left: 0; border-left: none; }
.json-tree .jt-key { color: #8a3ffc; font-weight: 700; }
.json-tree .jt-string { color: #1a7f37; }
.json-tree .jt-number { color: #0170B9; }
.json-tree .jt-boolean, .json-tree .jt-null { color: #c0392b; }
.json-tree .jt-toggle { cursor: pointer; user-select: none; color: var(--color-text-muted); display: inline-block; width: 14px; }
.json-tree li { margin: 2px 0; }
.json-tree li.collapsed > ul { display: none; }
.json-tree .jt-count { color: var(--color-text-muted); font-style: italic; margin-left: 4px; }
.json-tree .jt-line { white-space: pre-wrap; word-break: break-word; }

/* ---------- Content / article section ---------- */
.tool-content { padding: 10px 0 50px; max-width: 820px; }
.tool-content ul, .tool-content ol { padding-left: 1.3em; }
.tool-content li { margin-bottom: .4em; }
.faq-item { border-bottom: 1px solid var(--color-border); padding: 16px 0; }
.faq-item h3 { margin: 0 0 .4em; font-size: 1.05rem; }
.faq-item p { margin: 0; color: var(--color-text-muted); }

/* ---------- Related tools ---------- */
.related-tools { background: var(--color-bg-light); padding: 40px 0; border-top: 1px solid var(--color-border); }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; margin-top: 16px; }
.related-card { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 16px; display: block; color: var(--color-text); }
.related-card:hover { border-color: var(--color-primary); text-decoration: none; box-shadow: var(--shadow); }
.related-card .rc-icon { font-family: var(--font-mono); color: var(--color-primary); font-weight: 700; font-size: 1.1rem; }
.related-card h3 { margin: 8px 0 4px; font-size: 1rem; }
.related-card p { margin: 0; font-size: .85rem; color: var(--color-text-muted); }

/* ---------- Hub page ---------- */
.hub-hero { text-align: center; padding: 56px 0 32px; background: var(--color-bg-light); border-bottom: 1px solid var(--color-border); }
.hub-hero p { max-width: 620px; margin: 0 auto; color: var(--color-text-muted); font-size: 1.1rem; }
.hub-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; padding: 0 0 20px; }
.hub-category { padding-top: 36px; }
.hub-category h2 { margin: 0 0 4px; }
.hub-category .cat-count { color: var(--color-text-muted); font-size: .9rem; font-weight: 400; margin-left: 8px; }

/* ---------- Footer ---------- */
.site-footer { background: #1f2430; color: #c7cbd4; margin-top: 20px; }
.footer-top { display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between; padding: 40px 0 28px; }
.footer-brand { max-width: 320px; }
.site-footer .logo { color: #fff; }
.footer-tagline { color: #9aa0ac; font-size: .9rem; max-width: 320px; margin-top: 12px; }
.footer-col h3 { color: #fff; font-size: .9rem; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 14px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 8px; break-inside: avoid; }
.footer-col a { color: #c7cbd4; font-size: .92rem; }
.footer-col a:hover { color: #fff; }
.footer-tools-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 24px 28px; border-top: 1px solid #333a48; padding: 28px 0 8px; }
.footer-col-tools ul { columns: 2; column-gap: 20px; }
@media (max-width: 560px) { .footer-col-tools ul { columns: 1; } }
.footer-bottom { border-top: 1px solid #333a48; padding: 18px 0; font-size: .82rem; color: #8c93a1; }

@media (max-width: 760px) {
  .main-nav { position: absolute; top: 64px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 16px 20px; border-bottom: 1px solid var(--color-border); box-shadow: 0 8px 16px rgba(0,0,0,.08); display: none; gap: 14px; z-index: 40; }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
}