/* ==========================================================================
   SEO Schema Markup — main.css
   Hand-written, no framework. Light + dark via prefers-color-scheme + toggle.
   ========================================================================== */

:root {
  --accent: #5b6cff;
  --accent-hover: #4453e6;
  --accent-soft: #eef0ff;

  --bg: #ffffff;
  --bg-alt: #f6f7fb;
  --surface: #ffffff;
  --border: #e3e6ef;
  --text: #1a1d29;
  --text-soft: #5a6072;
  --code-bg: #f6f8fa;

  --ok: #1a9d5a;
  --ok-bg: #e7f6ee;
  --warn: #b8860b;
  --warn-bg: #fbf4e0;
  --err: #d12c43;
  --err-bg: #fde8eb;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(20, 24, 47, .06), 0 8px 24px rgba(20, 24, 47, .06);
  --maxw: 1120px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  --accent: #8b97ff;
  --accent-hover: #a3acff;
  --accent-soft: #1e2340;

  --bg: #0e1018;
  --bg-alt: #141826;
  --surface: #171b29;
  --border: #262b3d;
  --text: #e8eaf2;
  --text-soft: #9aa0b5;
  --code-bg: #0c0f18;

  --ok: #46c98a;
  --ok-bg: #12281d;
  --warn: #e3b341;
  --warn-bg: #2c2410;
  --err: #f8758a;
  --err-bg: #2c1419;

  --shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --accent: #8b97ff; --accent-hover: #a3acff; --accent-soft: #1e2340;
    --bg: #0e1018; --bg-alt: #141826; --surface: #171b29; --border: #262b3d;
    --text: #e8eaf2; --text-soft: #9aa0b5; --code-bg: #0c0f18;
    --ok: #46c98a; --ok-bg: #12281d; --warn: #e3b341; --warn-bg: #2c2410;
    --err: #f8758a; --err-bg: #2c1419;
    --shadow: 0 1px 3px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.2; font-weight: 700; letter-spacing: -.02em; }
h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 0 0 .5em; }
h2 { font-size: clamp(1.35rem, 3vw, 1.8rem); margin: 2em 0 .6em; }
h3 { font-size: 1.18rem; margin: 1.6em 0 .4em; }
p { margin: 0 0 1em; }

img { max-width: 100%; height: auto; }

/* ---------- Skip link ---------- */
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: #fff; padding: 10px 16px; z-index: 200; border-radius: 0 0 8px 0; }
.skip:focus { left: 0; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; gap: 18px; height: 62px; }
.brand { font-weight: 800; font-size: 1.1rem; letter-spacing: -.03em; color: var(--text); display: flex; align-items: center; gap: 8px; }
.brand:hover { text-decoration: none; }
.brand .logo { width: 26px; height: 26px; flex: none; }
.nav-spacer { flex: 1; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { color: var(--text-soft); padding: 8px 12px; border-radius: var(--radius-sm); font-size: .95rem; font-weight: 500; }
.nav-links a:hover { background: var(--bg-alt); color: var(--text); text-decoration: none; }

/* dropdown */
.dropdown { position: relative; }
.dropdown > button {
  background: none; border: 0; cursor: pointer; font: inherit; font-weight: 500; font-size: .95rem;
  color: var(--text-soft); padding: 8px 12px; border-radius: var(--radius-sm); display: flex; align-items: center; gap: 5px;
}
.dropdown > button:hover { background: var(--bg-alt); color: var(--text); }
.dropdown-menu {
  position: absolute; top: calc(100% + 6px); left: 0; min-width: 250px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 8px; display: none; flex-direction: column;
}
.dropdown.open .dropdown-menu { display: flex; }
.dropdown-menu a { padding: 8px 12px; border-radius: var(--radius-sm); color: var(--text); font-size: .92rem; }
.dropdown-menu a:hover { background: var(--bg-alt); text-decoration: none; }

.theme-toggle {
  background: none; border: 1px solid var(--border); cursor: pointer; color: var(--text);
  width: 38px; height: 38px; border-radius: var(--radius-sm); display: inline-flex; align-items: center; justify-content: center;
}
.theme-toggle:hover { background: var(--bg-alt); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .moon { display: none; }
[data-theme="dark"] .theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .moon { display: block; }
}

.nav-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: var(--radius-sm); width: 38px; height: 38px; cursor: pointer; color: var(--text); }

@media (max-width: 860px) {
  .nav-links { display: none; position: absolute; top: 62px; left: 0; right: 0; flex-direction: column; align-items: stretch; background: var(--surface); border-bottom: 1px solid var(--border); padding: 10px; gap: 2px; }
  .nav-links.open { display: flex; }
  .dropdown-menu { position: static; display: flex; box-shadow: none; border: 0; padding: 0 0 0 12px; }
  .dropdown > button { width: 100%; justify-content: space-between; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
}

/* ---------- Hero ---------- */
.hero { padding: 64px 0 40px; text-align: center; }
.hero p.lead { font-size: 1.18rem; color: var(--text-soft); max-width: 680px; margin: 0 auto 1.6em; }
.badge { display: inline-block; background: var(--accent-soft); color: var(--accent); font-size: .82rem; font-weight: 600; padding: 5px 12px; border-radius: 999px; margin-bottom: 18px; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font: inherit; font-weight: 600; font-size: .95rem; padding: 11px 18px; border-radius: var(--radius-sm); border: 1px solid transparent; transition: background .15s, border-color .15s; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); text-decoration: none; }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: var(--bg-alt); text-decoration: none; }
.btn-sm { padding: 7px 12px; font-size: .85rem; }
.btn svg { width: 16px; height: 16px; }

/* ---------- Cards grid (home) ---------- */
.grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card { display: block; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; transition: transform .15s, box-shadow .15s, border-color .15s; }
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--accent); text-decoration: none; }
.card h3 { margin: 0 0 6px; color: var(--text); }
.card p { margin: 0; color: var(--text-soft); font-size: .92rem; }
.card .ico { font-size: 1.4rem; margin-bottom: 10px; display: block; }

section.band { padding: 36px 0; }
section.band.alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ---------- Tool layout ---------- */
.tool { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; margin: 28px 0; }
@media (max-width: 900px) { .tool { grid-template-columns: 1fr; } }

.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; min-width: 0; }
.panel h2 { margin-top: 0; font-size: 1.15rem; }

.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 5px; }
.field label .req { color: var(--err); }
.field label .rec { color: var(--warn); font-weight: 500; font-size: .8rem; }
.field .hint { font-size: .8rem; color: var(--text-soft); margin: 4px 0 0; }
input[type=text], input[type=url], input[type=number], input[type=email], input[type=date], input[type=datetime-local], textarea, select {
  width: 100%; font: inherit; font-size: .95rem; padding: 10px 12px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--bg); color: var(--text);
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
textarea { resize: vertical; min-height: 110px; font-family: var(--mono); font-size: .88rem; }

.advanced > summary { cursor: pointer; font-weight: 600; font-size: .92rem; padding: 10px 0; color: var(--accent); list-style: none; }
.advanced > summary::-webkit-details-marker { display: none; }
.advanced > summary::before { content: "▸ "; }
.advanced[open] > summary::before { content: "▾ "; }

/* repeatable groups */
.repeat-item { border: 1px dashed var(--border); border-radius: var(--radius-sm); padding: 14px; margin-bottom: 12px; position: relative; }
.repeat-item .remove { position: absolute; top: 8px; right: 8px; background: none; border: 0; cursor: pointer; color: var(--text-soft); font-size: 1.1rem; line-height: 1; }
.repeat-item .remove:hover { color: var(--err); }

/* ---------- Output / code ---------- */
.output-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.output-head h2 { margin: 0; flex: 1; }
.codewrap { position: relative; }
pre.code { background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; overflow: auto; margin: 0; font-family: var(--mono); font-size: .82rem; line-height: 1.55; max-height: 540px; }
pre.code code { font-family: inherit; white-space: pre; }

/* JSON syntax highlight tokens */
.tok-key { color: #905; } .tok-str { color: #1a7f37; } .tok-num { color: #0550ae; }
.tok-bool { color: #cf222e; } .tok-null { color: #cf222e; } .tok-punc { color: var(--text-soft); }
[data-theme="dark"] .tok-key { color: #ff7b9c; } [data-theme="dark"] .tok-str { color: #7ee787; }
[data-theme="dark"] .tok-num { color: #79c0ff; } [data-theme="dark"] .tok-bool, [data-theme="dark"] .tok-null { color: #ff7b72; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .tok-key { color: #ff7b9c; }
  :root:not([data-theme="light"]) .tok-str { color: #7ee787; }
  :root:not([data-theme="light"]) .tok-num { color: #79c0ff; }
  :root:not([data-theme="light"]) .tok-bool, :root:not([data-theme="light"]) .tok-null { color: #ff7b72; }
}

/* ---------- Validation messages ---------- */
.results { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; }
.msg { display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border-radius: var(--radius-sm); font-size: .9rem; border: 1px solid transparent; }
.msg .dot { font-weight: 700; flex: none; }
.msg.ok { background: var(--ok-bg); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.msg.warn { background: var(--warn-bg); color: var(--warn); border-color: color-mix(in srgb, var(--warn) 30%, transparent); }
.msg.err { background: var(--err-bg); color: var(--err); border-color: color-mix(in srgb, var(--err) 30%, transparent); }
.msg a { color: inherit; text-decoration: underline; }
.summary-pill { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; font-size: .85rem; padding: 4px 10px; border-radius: 999px; }
.summary-pill.pass { background: var(--ok-bg); color: var(--ok); }
.summary-pill.fail { background: var(--err-bg); color: var(--err); }

/* toast */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px); background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 999px; font-size: .9rem; font-weight: 600; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; z-index: 300; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Prose (guides / explainers) ---------- */
.prose { max-width: 760px; margin: 0 auto; }
.prose ul, .prose ol { padding-left: 1.3em; margin: 0 0 1em; }
.prose li { margin-bottom: .4em; }
.prose code { background: var(--code-bg); border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; font-family: var(--mono); font-size: .86em; }
.prose blockquote { border-left: 3px solid var(--accent); margin: 1.2em 0; padding: .2em 0 .2em 16px; color: var(--text-soft); }
.prose table { width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: .92rem; }
.prose th, .prose td { border: 1px solid var(--border); padding: 9px 12px; text-align: left; }
.prose th { background: var(--bg-alt); }

.explainer { margin: 40px auto; max-width: 760px; }

/* CTA box (lead-gen) */
.cta-box { background: linear-gradient(135deg, var(--accent-soft), var(--surface)); border: 1px solid var(--accent); border-radius: var(--radius); padding: 26px; margin: 36px auto; max-width: 760px; }
.cta-box h3 { margin-top: 0; }

/* ---------- Ad slots (reserved, NOT live in repo) ---------- */
.ad-slot { min-height: 100px; margin: 28px auto; display: flex; align-items: center; justify-content: center; border: 1px dashed var(--border); border-radius: var(--radius-sm); color: var(--text-soft); font-size: .8rem; background: var(--bg-alt); max-width: 760px; }
.ad-slot[data-format="leaderboard"] { min-height: 90px; }
.ad-slot[data-format="inline"] { min-height: 250px; }

/* ---------- Ratings widget ---------- */
.rating-widget { display: flex; align-items: center; gap: 10px; margin: 24px 0; flex-wrap: wrap; }
.stars { display: inline-flex; gap: 2px; }
.stars button { background: none; border: 0; cursor: pointer; padding: 0; color: var(--border); font-size: 1.5rem; line-height: 1; }
.stars button.on, .stars button:hover, .stars button:hover ~ button { color: #f5a623; }
.stars { direction: rtl; } /* hover-fill trick */
.rating-meta { font-size: .88rem; color: var(--text-soft); }

/* ---------- Footer ---------- */
.site-footer { background: var(--bg-alt); border-top: 1px solid var(--border); margin-top: 64px; padding: 48px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-grid h4 { font-size: .82rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-soft); margin: 0 0 12px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 7px; }
.footer-grid a { color: var(--text-soft); font-size: .92rem; }
.footer-grid a:hover { color: var(--text); }
.footer-bottom { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--border); font-size: .85rem; color: var(--text-soft); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.footer-about { font-size: .9rem; color: var(--text-soft); }

/* ---------- breadcrumb visual ---------- */
.crumbs { font-size: .85rem; color: var(--text-soft); padding: 18px 0 0; }
.crumbs a { color: var(--text-soft); }
.crumbs a:hover { color: var(--accent); }

/* utility */
.center { text-align: center; }
.mt0 { margin-top: 0; } .mb0 { margin-bottom: 0; }
.muted { color: var(--text-soft); }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 0; }
.tag-list span { background: var(--bg-alt); border: 1px solid var(--border); border-radius: 999px; padding: 3px 10px; font-size: .78rem; color: var(--text-soft); }