/* ============================================================
   Syntax Training — site stylesheet
   Palette:  ink #131E26 · petrol #0F4C5C · amber #E9A23B
             paper #FFFFFF · mist #F1F4F5 · line #DCE3E6
   Type:     Space Grotesk (display) · IBM Plex Sans (body)
             IBM Plex Mono (exam codes / labels)
   ============================================================ */

:root {
  --ink: #131e26;
  --ink-2: #1d2c37;
  --petrol: #0f4c5c;
  --petrol-deep: #0b3946;
  --amber: #e9a23b;
  --amber-deep: #b97a17;
  --paper: #ffffff;
  --mist: #f1f4f5;
  --line: #dce3e6;
  --line-dark: rgba(255, 255, 255, 0.14);
  --text: #33424c;
  --muted: #5e7079;
  --radius: 10px;
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.15;
  letter-spacing: -0.015em;
}

a { color: var(--petrol); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--petrol-deep); }

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
  border-radius: 2px;
}

.wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

.skip-link {
  position: absolute; left: 16px; top: -48px; z-index: 100;
  background: var(--ink); color: #fff; padding: 10px 16px;
  border-radius: 0 0 8px 8px; transition: top 0.15s;
}
.skip-link:focus { top: 0; }

/* ---- mono label (the site's structural voice) ---- */
.mono-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
h3.mono-label { color: var(--muted); }

.code-chip {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 8px;
  white-space: nowrap;
  color: var(--ink-2);
}

/* ---- buttons ---- */
.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  padding: 12px 26px;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn-amber { background: var(--amber); color: var(--ink); }
.btn-amber:hover { background: #f0b25a; color: var(--ink); }
.btn-ink { background: var(--ink); color: #fff; }
.btn-ink:hover { background: var(--ink-2); color: #fff; }
.btn-ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); }
.btn-ghost-light { border-color: var(--line-dark); color: #fff; background: transparent; }
.btn-ghost-light:hover { border-color: #fff; color: #fff; }

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 68px; gap: 24px;
}

.brand {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none;
}
.brand-mark {
  font-family: var(--font-mono); font-weight: 500; font-size: 1rem;
  background: var(--ink); color: var(--amber);
  width: 36px; height: 36px; border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
}
.brand-name {
  font-family: var(--font-display); font-size: 1.2rem;
  color: var(--ink); font-weight: 500; letter-spacing: -0.01em;
}
.brand-name strong { font-weight: 700; }
.brand-inverse .brand-name { color: #fff; }

.nav-menu {
  display: flex; align-items: center; gap: 6px; list-style: none;
}
.nav-menu a:not(.btn) {
  display: block; padding: 8px 14px;
  font-weight: 500; font-size: 0.9375rem;
  color: var(--ink-2); text-decoration: none; border-radius: 8px;
}
.nav-menu a:not(.btn):hover { background: var(--mist); }
.nav-menu a[aria-current="page"] {
  color: var(--petrol);
  box-shadow: inset 0 -2px 0 var(--amber);
  border-radius: 8px 8px 0 0;
}
.nav-cta { margin-left: 10px; }
.nav-cta .btn { padding: 9px 20px; font-size: 0.9375rem; }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--line);
  border-radius: 8px; padding: 9px 10px; cursor: pointer;
}
.nav-toggle-bar {
  display: block; width: 20px; height: 2px; background: var(--ink);
  margin: 4px 0; transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ============================================================
   Hero + exam registry board (signature element)
   ============================================================ */
.hero {
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(15, 76, 92, 0.07), transparent 60%),
    var(--paper);
  border-bottom: 1px solid var(--line);
  padding: 72px 0 80px;
}
.hero-grid {
  display: grid; grid-template-columns: 1.15fr 0.85fr;
  gap: 56px; align-items: center;
}
.hero-eyebrow { display: block; margin-bottom: 18px; color: var(--petrol); }
.hero h1 {
  font-size: clamp(2.1rem, 4.2vw, 3.15rem);
  font-weight: 700; margin-bottom: 20px;
}
.hero h1 .accent { color: var(--petrol); }
.hero-copy { font-size: 1.125rem; max-width: 34em; margin-bottom: 30px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 26px; }
.hero-note { font-size: 0.9375rem; color: var(--muted); }
.hero-note .code-chip { margin: 0 2px; }

/* the registry board */
.registry {
  background: var(--ink);
  border-radius: 14px;
  padding: 22px 0 8px;
  box-shadow: 0 24px 48px -24px rgba(19, 30, 38, 0.5);
  overflow: hidden;
}
.registry-head {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 0 22px 14px; border-bottom: 1px solid var(--line-dark);
}
.registry-head .mono-label { color: rgba(255, 255, 255, 0.55); }
.registry-live {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--amber);
}
.registry-live::before {
  content: ""; display: inline-block; width: 7px; height: 7px;
  border-radius: 50%; background: var(--amber); margin-right: 7px;
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

.registry-row {
  display: grid; grid-template-columns: 110px 1fr auto;
  gap: 14px; align-items: center;
  padding: 11px 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  text-decoration: none;
}
.registry-row:last-child { border-bottom: 0; }
.registry-row .r-code {
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--amber);
}
.registry-row .r-name {
  font-size: 0.9rem; color: rgba(255, 255, 255, 0.88);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.registry-row .r-vendor {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: rgba(255, 255, 255, 0.45);
}
.registry-row:hover { background: rgba(255, 255, 255, 0.05); }
.registry-row:hover .r-name { color: #fff; }

/* ============================================================
   Sections
   ============================================================ */
.section { padding: 76px 0; }
.section-mist { background: var(--mist); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head .mono-label { display: block; margin-bottom: 12px; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; margin-bottom: 14px; }
.section-head p { color: var(--muted); }
.section-head-row {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
}
.section-head-row .section-head { margin-bottom: 0; }
.section-head-row { margin-bottom: 44px; }

/* ---- vendor grid ---- */
.vendor-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
}
.vendor-card {
  display: flex; flex-direction: column; gap: 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
}
.vendor-card:hover {
  border-color: var(--petrol);
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -18px rgba(15, 76, 92, 0.35);
  color: var(--text);
}
.vendor-card-top { display: flex; align-items: center; gap: 14px; }
.vendor-tile {
  width: 44px; height: 44px; flex: none;
  border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 700; font-size: 1.15rem;
  color: #fff;
  /* per-vendor hue set inline via --tile-h */
  background: hsl(var(--tile-h, 200) 42% 34%);
}
.vendor-card h3 { font-size: 1.1rem; font-weight: 600; }
.vendor-card p { font-size: 0.9rem; color: var(--muted); line-height: 1.55; }
.vendor-card-codes { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }

/* ---- steps (a real sequence) ---- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: step; }
.step {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 24px;
  counter-increment: step; position: relative;
}
.step::before {
  content: "Step " counter(step);
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--amber-deep);
  display: block; margin-bottom: 14px;
}
.step h3 { font-size: 1.15rem; margin-bottom: 10px; }
.step p { font-size: 0.95rem; color: var(--muted); }

/* ---- feature list ---- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px 28px; }
.feature h3 { font-size: 1.05rem; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.feature h3::before {
  content: "→"; color: var(--amber-deep); font-family: var(--font-mono);
  font-size: 0.9rem;
}
.feature p { font-size: 0.95rem; color: var(--muted); }

/* ---- CTA band ---- */
.cta-band { background: var(--petrol); }
.cta-band .wrap {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 24px; padding-top: 56px; padding-bottom: 56px;
}
.cta-band h2 { color: #fff; font-size: clamp(1.5rem, 2.6vw, 2rem); max-width: 18em; }
.cta-band p { color: rgba(255, 255, 255, 0.75); margin-top: 8px; }

/* ============================================================
   Vendor detail page
   ============================================================ */
.page-head {
  background: var(--ink); color: #fff;
  padding: 56px 0 60px;
}
.breadcrumb {
  font-family: var(--font-mono); font-size: 0.78rem;
  margin-bottom: 28px;
}
.breadcrumb a { color: rgba(255, 255, 255, 0.55); text-decoration: none; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { color: rgba(255, 255, 255, 0.3); margin: 0 8px; }
.breadcrumb .here { color: var(--amber); }

.page-head-grid { display: flex; gap: 24px; align-items: flex-start; }
.page-head .vendor-tile { width: 64px; height: 64px; font-size: 1.6rem; border-radius: 12px; }
.page-head h1 { color: #fff; font-size: clamp(1.9rem, 3.6vw, 2.6rem); margin-bottom: 10px; }
.page-head .tagline { color: rgba(255, 255, 255, 0.75); max-width: 40em; font-size: 1.05rem; }

.vendor-body {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px;
  padding: 64px 0 76px;
}
.vendor-about p + p { margin-top: 18px; }
.vendor-about .mono-label { display: block; margin-bottom: 16px; }
.vendor-help { margin-top: 36px; }
.vendor-help ul { list-style: none; margin-top: 14px; }
.vendor-help li {
  padding: 10px 0 10px 26px; position: relative;
  border-bottom: 1px dashed var(--line); font-size: 0.97rem;
}
.vendor-help li::before {
  content: "✓"; position: absolute; left: 0; color: var(--amber-deep);
  font-family: var(--font-mono);
}

.cert-table-card {
  border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
  align-self: start;
}
.cert-table-card .mono-label {
  display: block; padding: 16px 20px; background: var(--mist);
  border-bottom: 1px solid var(--line);
}
.cert-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.cert-table th {
  text-align: left; font-family: var(--font-mono); font-weight: 500;
  font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted); padding: 12px 20px; border-bottom: 1px solid var(--line);
}
.cert-table td { padding: 13px 20px; border-bottom: 1px solid var(--line); vertical-align: top; }
.cert-table tr:last-child td { border-bottom: 0; }
.cert-table .cert-name { font-weight: 500; color: var(--ink-2); }
.cert-table .cert-level { color: var(--muted); font-size: 0.85rem; white-space: nowrap; }
.cert-table-cta { padding: 18px 20px; background: var(--mist); border-top: 1px solid var(--line); }
.cert-table-cta .btn { width: 100%; text-align: center; }
.table-scroll { overflow-x: auto; }

/* ============================================================
   All-certifications page
   ============================================================ */
.filter-bar { margin-bottom: 32px; }
.filter-bar input {
  width: 100%; max-width: 420px;
  font-family: var(--font-mono); font-size: 0.95rem;
  padding: 12px 16px; border: 1.5px solid var(--line);
  border-radius: var(--radius); background: var(--paper); color: var(--ink);
}
.filter-bar input:focus { border-color: var(--petrol); outline: none; }
.filter-empty { color: var(--muted); padding: 24px 0; display: none; }

/* ============================================================
   Contact page
   ============================================================ */
.contact-grid {
  display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 56px;
  padding: 64px 0 76px; align-items: start;
}
.contact-info .mono-label { display: block; margin-bottom: 6px; margin-top: 28px; }
.contact-info .mono-label:first-of-type { margin-top: 32px; }
.contact-info h1 { font-size: clamp(1.8rem, 3.4vw, 2.4rem); margin-bottom: 14px; }
.contact-info .lede { color: var(--muted); }
.contact-info .big-line { font-size: 1.05rem; color: var(--ink-2); font-weight: 500; }

.contact-form {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: 14px; padding: 34px;
}
.form-row { margin-bottom: 20px; }
.form-row label {
  display: block; font-weight: 600; font-size: 0.9rem;
  color: var(--ink); margin-bottom: 7px;
}
.form-row label .req { color: var(--amber-deep); }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; font-family: var(--font-body); font-size: 1rem;
  padding: 11px 14px; border: 1.5px solid var(--line);
  border-radius: 8px; background: var(--paper); color: var(--ink);
}
.form-row textarea { resize: vertical; min-height: 140px; }
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  border-color: var(--petrol); outline: none;
  box-shadow: 0 0 0 3px rgba(15, 76, 92, 0.12);
}
.form-row-split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.captcha-row {
  display: flex; gap: 14px; align-items: center; flex-wrap: wrap;
  background: var(--mist); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px;
}
.captcha-row img { border-radius: 6px; border: 1px solid var(--line); }
.captcha-row input { max-width: 170px; font-family: var(--font-mono); letter-spacing: 0.2em; }
.captcha-refresh {
  background: none; border: none; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--petrol);
  text-decoration: underline; text-underline-offset: 3px; padding: 4px;
}
.captcha-help { font-size: 0.82rem; color: var(--muted); width: 100%; }

/* honeypot — hidden from humans, present for bots */
.field-website { position: absolute; left: -9999px; top: -9999px; }

.alert { border-radius: 10px; padding: 16px 18px; margin-bottom: 24px; font-size: 0.97rem; }
.alert-ok { background: #eaf5ee; border: 1px solid #bfdfca; color: #1e5b34; }
.alert-err { background: #fdefec; border: 1px solid #f2c6bc; color: #8c2f1b; }
.alert ul { margin: 6px 0 0 18px; }

/* ============================================================
   Footer
   ============================================================ */
.site-footer { background: var(--ink); color: rgba(255, 255, 255, 0.75); }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 0.8fr;
  gap: 40px; padding-top: 60px; padding-bottom: 44px;
}
.footer-brand p { font-size: 0.92rem; margin-top: 16px; max-width: 30em; }
.footer-address a { color: var(--amber); }
.footer-col h3 { margin-bottom: 14px; color: rgba(255, 255, 255, 0.45); }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a {
  color: rgba(255, 255, 255, 0.78); text-decoration: none; font-size: 0.92rem;
}
.footer-col a:hover { color: #fff; text-decoration: underline; }
.footer-bottom {
  border-top: 1px solid var(--line-dark);
  padding-top: 22px; padding-bottom: 30px;
  font-size: 0.82rem; color: rgba(255, 255, 255, 0.45);
}
.footer-disclaimer { margin-top: 8px; max-width: 62em; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .vendor-grid { grid-template-columns: repeat(2, 1fr); }
  .steps, .features { grid-template-columns: 1fr 1fr; }
  .vendor-body, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .vendor-grid, .steps, .features, .form-row-split { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .hero { padding: 48px 0 56px; }

  .nav-toggle { display: block; }
  .nav-menu {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: 10px 16px 18px;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a:not(.btn) { padding: 13px 10px; }
  .nav-cta { margin: 10px 0 0; }
  .nav-cta .btn { display: block; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}