/* AI Tools Decoded — aitoolsdecoded.com
   Single stylesheet. No frameworks, no webfonts, no render-blocking JS. */

:root {
  --bg: #ffffff;
  --surface: #f6f7f9;
  --surface-2: #eef0f4;
  --ink: #14161a;
  --ink-2: #3d4552;
  --muted: #66708090;
  --muted-solid: #667080;
  --line: #e2e6ec;
  --accent: #4f46e5;
  --accent-dark: #3f37c9;
  --accent-soft: #eef0ff;
  --good: #0f8a5f;
  --warn: #b45309;
  --maxw: 1120px;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 22, 26, .04), 0 8px 24px rgba(20, 22, 26, .06);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }

h1, h2, h3, h4 { color: var(--ink); line-height: 1.25; margin: 0 0 .5em; font-weight: 700; letter-spacing: -.02em; }
h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 2.2em; }
h3 { font-size: 1.25rem; margin-top: 1.8em; }
p { margin: 0 0 1.15em; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
ul, ol { padding-left: 1.3em; margin: 0 0 1.2em; }
li { margin-bottom: .5em; }
code { background: var(--surface-2); padding: .15em .4em; border-radius: 5px; font-size: .9em; }
blockquote {
  margin: 1.5em 0; padding: 1em 1.4em; border-left: 3px solid var(--accent);
  background: var(--surface); border-radius: 0 8px 8px 0; color: var(--ink-2);
}
blockquote p:last-child { margin-bottom: 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2.5em 0; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.88); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 20px; }
.logo { display: flex; align-items: center; gap: 9px; font-weight: 800; color: var(--ink); font-size: 1.05rem; letter-spacing: -.03em; }
.logo:hover { text-decoration: none; }
.logo svg { flex: none; }
.nav-links { display: flex; gap: 26px; align-items: center; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--ink-2); font-size: .95rem; font-weight: 500; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); text-decoration: none; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: 8px; padding: 7px 9px; cursor: pointer; }

@media (max-width: 780px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line); padding: 8px 24px 16px;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; margin: 0; }
  .nav-links a { display: block; padding: 11px 0; border-bottom: 1px solid var(--line); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; background: var(--accent); color: #fff;
  padding: 13px 22px; border-radius: 10px; font-weight: 600; font-size: .97rem;
  border: 1px solid var(--accent); transition: background .15s ease, transform .15s ease;
}
.btn:hover { background: var(--accent-dark); border-color: var(--accent-dark); text-decoration: none; transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--accent); }
.btn-outline:hover { background: var(--accent-soft); color: var(--accent-dark); }
.btn-sm { padding: 9px 16px; font-size: .89rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 1.5em 0; }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 56px; background: linear-gradient(180deg, var(--accent-soft) 0%, #fff 100%); border-bottom: 1px solid var(--line); }
.hero h1 { max-width: 16ch; }
.hero .lede { font-size: 1.2rem; max-width: 58ch; color: var(--ink-2); }
.eyebrow { display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--accent); background: #fff; border: 1px solid var(--line); padding: 5px 11px; border-radius: 999px; margin-bottom: 18px; }

.page-head { padding: 56px 0 8px; border-bottom: 1px solid var(--line); margin-bottom: 40px; }
.page-head .lede { font-size: 1.12rem; max-width: 62ch; }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); display: flex; flex-direction: column;
  transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 2px 4px rgba(20,22,26,.05), 0 14px 34px rgba(20,22,26,.09); }
.card h3 { margin-top: 0; }
.card p { color: var(--ink-2); font-size: .96rem; }
.card .card-foot { margin-top: auto; padding-top: 14px; }
.card-tag { font-size: .74rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; color: var(--muted-solid); margin-bottom: 10px; }

.tool-icon { width: 44px; height: 44px; border-radius: 11px; display: grid; place-items: center; font-weight: 800; color: #fff; font-size: 1.1rem; margin-bottom: 14px; }
.ic-claude { background: linear-gradient(135deg, #c96442, #a34e33); }
.ic-chatgpt { background: linear-gradient(135deg, #10a37f, #0b7a5f); }
.ic-perplexity { background: linear-gradient(135deg, #20808d, #16606b); }
.ic-generic { background: linear-gradient(135deg, #4f46e5, #3f37c9); }

/* ---------- Sections ---------- */
.section { padding: 64px 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 62ch; margin-bottom: 34px; }
.section-head h2 { margin-top: 0; }
.section-head p { color: var(--ink-2); margin-bottom: 0; }

/* ---------- Picker ---------- */
.picker { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.picker a {
  display: block; background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 18px 20px; color: var(--ink); font-weight: 600;
}
.picker a:hover { border-color: var(--accent); background: var(--accent-soft); text-decoration: none; }
.picker span { display: block; font-weight: 400; font-size: .9rem; color: var(--muted-solid); margin-top: 3px; }

/* ---------- Tables ---------- */
.table-scroll { overflow-x: auto; margin: 1.8em 0; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: .94rem; min-width: 640px; background: #fff; }
th, td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--surface); font-weight: 700; color: var(--ink); font-size: .84rem; letter-spacing: .04em; text-transform: uppercase; }
tbody tr:last-child td { border-bottom: 0; }
td strong { color: var(--ink); }
.yes { color: var(--good); font-weight: 700; }
.no { color: var(--muted-solid); }
.row-label { font-weight: 600; color: var(--ink); background: #fcfcfd; }

/* ---------- Verdict / callouts ---------- */
.verdict { background: var(--accent-soft); border: 1px solid #d9dcff; border-radius: var(--radius); padding: 24px 26px; margin: 1.8em 0; }
.verdict h3 { margin-top: 0; }
.verdict p:last-child { margin-bottom: 0; }

.callout { background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 0 10px 10px 0; padding: 18px 22px; margin: 1.6em 0; font-size: .96rem; }
.callout p:last-child { margin-bottom: 0; }
.callout strong { color: var(--ink); }

.pros-cons { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin: 1.8em 0; }
.pros, .cons { border: 1px solid var(--line); border-radius: 12px; padding: 20px 22px; background: #fff; }
.pros h4, .cons h4 { margin: 0 0 .7em; font-size: 1rem; }
.pros h4 { color: var(--good); }
.cons h4 { color: var(--warn); }
.pros ul, .cons ul { margin: 0; font-size: .94rem; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--ink); color: #d7dbe2; border-radius: var(--radius); padding: 38px 36px; margin: 2.4em 0; }
.cta-band h2, .cta-band h3 { color: #fff; margin-top: 0; }
.cta-band p { color: #aeb6c2; }
.cta-band .btn { background: #fff; color: var(--ink); border-color: #fff; }
.cta-band .btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---------- Article ---------- */
.article { padding: 48px 0 64px; }
.article-meta { color: var(--muted-solid); font-size: .89rem; margin-bottom: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.article h2 { scroll-margin-top: 84px; }
.toc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 26px; margin: 0 0 2.4em; }
.toc h2 { margin: 0 0 .6em !important; font-size: .82rem; text-transform: uppercase; letter-spacing: .09em; color: var(--muted-solid); }
.toc ol { margin: 0; font-size: .95rem; }

.breadcrumb { font-size: .87rem; color: var(--muted-solid); margin-bottom: 14px; }
.breadcrumb a { color: var(--muted-solid); }
.breadcrumb a:hover { color: var(--accent); }

.disclosure-inline { font-size: .86rem; color: var(--muted-solid); background: var(--surface); border-radius: 8px; padding: 11px 15px; margin-bottom: 28px; border: 1px solid var(--line); }
.disclosure-inline p { margin: 0; }

/* ---------- Post list ---------- */
.post-list { list-style: none; padding: 0; margin: 0; }
.post-list li { border-bottom: 1px solid var(--line); padding: 24px 0; margin: 0; }
.post-list li:first-child { padding-top: 0; }
.post-list h3 { margin: 0 0 .35em; font-size: 1.3rem; }
.post-list h3 a { color: var(--ink); }
.post-list h3 a:hover { color: var(--accent); text-decoration: none; }
.post-list p { margin: 0 0 .5em; color: var(--ink-2); font-size: .97rem; }
.post-meta { font-size: .84rem; color: var(--muted-solid); }

/* ---------- FAQ ---------- */
.faq details { border: 1px solid var(--line); border-radius: 12px; padding: 0; margin-bottom: 12px; background: #fff; overflow: hidden; }
.faq summary { cursor: pointer; padding: 17px 22px; font-weight: 600; color: var(--ink); list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--accent); font-weight: 400; font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: "\2212"; }
.faq details[open] summary { border-bottom: 1px solid var(--line); }
.faq .faq-body { padding: 17px 22px; font-size: .96rem; }
.faq .faq-body p:last-child { margin-bottom: 0; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #9aa3b0; padding: 52px 0 30px; margin-top: 72px; font-size: .93rem; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 36px; margin-bottom: 34px; }
.site-footer h4 { color: #fff; font-size: .8rem; text-transform: uppercase; letter-spacing: .09em; margin-bottom: 14px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 9px; }
.site-footer a { color: #9aa3b0; }
.site-footer a:hover { color: #fff; }
.site-footer .logo { color: #fff; margin-bottom: 12px; }
.footer-bottom { border-top: 1px solid #2a2f38; padding-top: 22px; font-size: .86rem; color: #6d7683; }
.footer-bottom p { margin: 0 0 .5em; }
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr; gap: 26px; } }

/* ---------- Utilities ---------- */
.center { text-align: center; }
.muted { color: var(--muted-solid); }
.small { font-size: .88rem; }
.mt0 { margin-top: 0; }
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 18px; margin: 2em 0; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.stat .n { font-size: 1.5rem; font-weight: 800; color: var(--ink); display: block; letter-spacing: -.03em; }
.stat .l { font-size: .85rem; color: var(--muted-solid); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; background: #fff; padding: 10px 16px; border-radius: 8px; z-index: 100; border: 2px solid var(--accent); }