/* ============================================================
   StackScope — spec-sheet / field-inspection visual identity
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  /* --- color tokens --- */
  --paper: #edf0e8;
  --paper-raised: #f6f7f2;
  --ink: #1b211d;
  --ink-soft: #4b544c;
  --navy: #29344a;
  --navy-soft: #4c5877;
  --verified: #2f6e51;
  --verified-soft: #e4ede6;
  --flag: #a63d40;
  --flag-soft: #f3e3e1;
  --teal: #1f6f73;
  --line: #cfd5c6;
  --line-strong: #9aa393;

  /* --- type tokens --- */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --radius: 3px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: -1px -1px;
  background-attachment: fixed;
}

a { color: var(--teal); }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 28px; }

/* ---------------- header ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(237, 240, 232, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line-strong);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
  display: flex; align-items: center; gap: 8px;
}
.logo .bracket { font-family: var(--font-mono); color: var(--teal); font-weight: 500; }
.main-nav { display: flex; gap: 28px; align-items: center; }
.main-nav a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.main-nav a:hover { color: var(--ink); border-color: var(--line-strong); }

/* ---------------- hero ---------------- */
.hero { padding: 76px 0 64px; }
.hero-grid {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: ""; width: 22px; height: 1px; background: var(--teal);
}
h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4vw, 3.1rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: 0 0 22px;
  color: var(--ink);
}
.hero-sub {
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 46ch;
  margin: 0 0 28px;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  padding: 12px 20px;
  border-radius: var(--radius);
  text-decoration: none;
  display: inline-block;
  border: 1px solid var(--ink);
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--navy); border-color: var(--navy); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--paper-raised); }

/* ---------------- inspection tag (hero visual) ---------------- */
.tag-card {
  position: relative;
  background: var(--paper-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 22px 22px 26px;
  box-shadow: 0 1px 0 var(--line-strong), 0 12px 28px -18px rgba(27,33,29,0.35);
}
.tag-card::before {
  content: "";
  position: absolute; left: -1px; top: 18px; bottom: 18px; width: 4px;
  background: repeating-linear-gradient(180deg, var(--navy) 0 6px, transparent 6px 12px);
  border-radius: 2px;
}
.tag-head {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-soft);
  text-transform: uppercase; letter-spacing: 0.06em;
  border-bottom: 1px dashed var(--line-strong);
  padding-bottom: 10px; margin-bottom: 12px;
}
.tag-row {
  display: grid; grid-template-columns: 1.2fr 0.9fr 0.9fr; gap: 8px;
  padding: 9px 0; border-bottom: 1px solid var(--line);
  font-size: 0.88rem; align-items: center;
}
.tag-row:last-of-type { border-bottom: none; }
.tag-row .name { font-weight: 600; }
.tag-row .val { font-family: var(--font-mono); font-size: 0.82rem; color: var(--ink-soft); }
.tag-row.pick { position: relative; }
.tag-row.pick .name { color: var(--verified); }

.stamp-updated {
  margin-top: 14px; font-family: var(--font-mono); font-size: 0.7rem; color: var(--ink-soft);
  display: flex; align-items: center; gap: 6px;
}
.stamp-updated .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--verified); display: inline-block; }

/* ---------------- categories ---------------- */
.section { padding: 64px 0; }
.section-head { margin-bottom: 34px; max-width: 60ch; }
.section-head .eyebrow { margin-bottom: 12px; }
h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin: 0 0 10px; letter-spacing: -0.01em;
}
.section-head p { color: var(--ink-soft); margin: 0; }

.cat-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.cat-card {
  background: var(--paper-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  opacity: 0; transform: translateY(10px);
}
.cat-card.is-visible { opacity: 1; transform: translateY(0); transition: opacity 0.5s ease, transform 0.5s ease; }
.cat-card:hover { transform: translateY(-3px); box-shadow: 0 10px 22px -16px rgba(27,33,29,0.4); }
.cat-card .tab {
  position: absolute; top: -9px; left: 18px;
  background: var(--navy); color: var(--paper);
  font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.05em;
  padding: 3px 8px; border-radius: 2px; text-transform: uppercase;
}
.cat-card .tab.soon { background: var(--line-strong); color: var(--ink); }
.cat-card h3 {
  font-family: var(--font-display); font-size: 1.05rem; margin: 10px 0 6px;
}
.cat-card .meta {
  font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-soft);
  display: flex; justify-content: space-between; align-items: center; margin-top: 14px;
}

/* ---------------- comparison table ---------------- */
.report-card {
  background: var(--paper-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
}
.report-toolbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 20px; border-bottom: 1px solid var(--line-strong);
  font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-soft);
  flex-wrap: wrap; gap: 8px;
}
.table-scroll { overflow-x: auto; }
table.compare {
  width: 100%; border-collapse: collapse; min-width: 760px;
}
table.compare th, table.compare td {
  text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line);
  font-size: 0.88rem; vertical-align: top;
}
table.compare thead th {
  font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.04em; color: var(--ink-soft); background: var(--paper);
  cursor: pointer; user-select: none; white-space: nowrap;
  border-bottom: 1px solid var(--line-strong);
}
table.compare thead th:hover { color: var(--ink); }
table.compare thead th .arrow { font-size: 0.7em; margin-left: 4px; opacity: 0.6; }
table.compare tbody tr:hover { background: var(--paper); }
table.compare td.tool-name { font-weight: 600; font-family: var(--font-display); font-size: 0.95rem; }
table.compare td .price { font-family: var(--font-mono); }
table.compare td .note { display: block; color: var(--ink-soft); font-size: 0.78rem; margin-top: 3px; }
.badge {
  display: inline-block; font-family: var(--font-mono); font-size: 0.65rem;
  text-transform: uppercase; letter-spacing: 0.05em;
  padding: 2px 7px; border-radius: 2px; margin-left: 6px; vertical-align: middle;
}
.badge-verified { background: var(--verified-soft); color: var(--verified); }
.sentiment { font-size: 0.82rem; color: var(--ink-soft); max-width: 26ch; }

.report-footnote {
  padding: 14px 20px; font-family: var(--font-mono); font-size: 0.74rem;
  color: var(--ink-soft); border-top: 1px dashed var(--line-strong);
  background: var(--paper);
}

/* ---------------- methodology ---------------- */
.method-list { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.method-list li {
  counter-increment: step;
  display: grid; grid-template-columns: 44px 1fr; gap: 18px;
  padding: 20px 0; border-bottom: 1px solid var(--line);
}
.method-list li:last-child { border-bottom: none; }
.method-list li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--teal);
  border: 1px solid var(--line-strong); border-radius: 50%;
  width: 34px; height: 34px; display: flex; align-items: center; justify-content: center;
}
.method-list h4 { margin: 2px 0 6px; font-family: var(--font-display); font-size: 1.02rem; }
.method-list p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

/* ---------------- footer ---------------- */
footer {
  border-top: 1px solid var(--line-strong);
  padding: 40px 0 48px;
  margin-top: 20px;
}
.foot-grid { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.foot-disclosure {
  font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-soft);
  max-width: 52ch; line-height: 1.6;
}
.foot-links { display: flex; gap: 20px; }
.foot-links a { font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink-soft); text-decoration: none; }
.foot-links a:hover { color: var(--ink); }

/* ---------------- content pages (about/contact/faq/terms/privacy) ---------------- */
.page-hero { padding: 56px 0 40px; border-bottom: 1px solid var(--line-strong); }
.page-hero h1 { font-size: clamp(1.9rem, 3.4vw, 2.6rem); margin: 0 0 12px; }
.page-hero p { color: var(--ink-soft); max-width: 56ch; margin: 0; }

.content { padding: 48px 0 72px; }
.content-narrow { max-width: 72ch; }
.content h2 { font-size: 1.3rem; margin: 40px 0 12px; }
.content h2:first-child { margin-top: 0; }
.content h3 { font-family: var(--font-display); font-size: 1.05rem; margin: 24px 0 8px; }
.content p { color: var(--ink); margin: 0 0 14px; }
.content ul, .content ol { color: var(--ink); margin: 0 0 14px; padding-left: 22px; }
.content li { margin-bottom: 6px; }
.content .updated {
  font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-soft);
  margin-bottom: 28px; display: inline-block; padding: 4px 10px;
  border: 1px solid var(--line-strong); border-radius: 2px;
}

/* FAQ accordion */
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-q {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  font-family: var(--font-display); font-size: 1rem; color: var(--ink);
  padding: 18px 0; display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-q .plus { font-family: var(--font-mono); color: var(--teal); flex-shrink: 0; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.25s ease; }
.faq-a p { color: var(--ink-soft); padding-bottom: 18px; margin: 0; }
.faq-item.open .faq-a { max-height: 400px; }
.faq-item.open .plus { transform: rotate(45deg); }
.faq-q .plus { transition: transform 0.2s ease; display: inline-block; }

/* contact form */
.contact-form { max-width: 480px; }
.form-row { margin-bottom: 18px; display: flex; flex-direction: column; gap: 6px; }
.form-row label {
  font-family: var(--font-mono); font-size: 0.76rem; text-transform: uppercase;
  letter-spacing: 0.04em; color: var(--ink-soft);
}
.form-row input, .form-row select, .form-row textarea {
  font-family: var(--font-body); font-size: 0.95rem; padding: 11px 12px;
  border: 1px solid var(--line-strong); border-radius: var(--radius); background: var(--paper-raised);
  color: var(--ink);
}
.form-row textarea { resize: vertical; min-height: 110px; }
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  outline: 2px solid var(--teal); outline-offset: 1px;
}
.contact-info {
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--ink-soft);
  margin-top: 32px; padding-top: 24px; border-top: 1px dashed var(--line-strong);
}
.contact-info a { color: var(--teal); }

/* ---------------- responsive ---------------- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .cat-grid { grid-template-columns: 1fr; }
  .wrap { padding: 0 18px; }
  .hero { padding: 52px 0 44px; }
  .foot-grid { flex-direction: column; }
}