/* ==========================================================================
   coupler-io-vs.com — shared stylesheet
   Palette: neutral base + blue range (deep navy → sky tint)
   ========================================================================== */

:root {
  /* Color tokens */
  --navy-950: #0e2239;   /* ink / headings */
  --navy-800: #16456e;   /* deep blue */
  --blue-600: #1f6fb2;   /* primary accent */
  --blue-400: #4c9fdc;   /* light accent */
  --blue-100: #d9e9f6;   /* borders on tint */
  --blue-050: #eaf2f9;   /* tint background */
  --paper:    #fbfcfe;   /* page background */
  --white:    #ffffff;
  --slate-600:#51637a;   /* secondary text */
  --slate-300:#c3cedb;   /* hairlines */

  /* Type */
  --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;

  /* Layout */
  --content-width: 76rem;
  --article-width: 50rem;
  --radius: 10px;
}

/* ---------- Reset & base ---------- */

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

html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--navy-950);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--blue-600); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--navy-800); }

:focus-visible {
  outline: 2px solid var(--blue-600);
  outline-offset: 2px;
  border-radius: 2px;
}

.wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Header ---------- */

.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--slate-300);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  color: var(--navy-950);
  text-decoration: none;
}

.logo:hover { color: var(--navy-950); }

.logo .vs-mark {
  width: 1.9rem;
  height: 1.9rem;
  flex: none;
}

.logo .tld { color: var(--slate-600); font-weight: 500; }

.site-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--slate-600);
  text-decoration: none;
  margin-left: 1.5rem;
}

.site-nav a:hover { color: var(--blue-600); }

/* ---------- VS mark (signature element) ---------- */

.vs-mark { display: inline-block; }

/* ---------- Hero ---------- */

.hero {
  background:
    radial-gradient(60rem 30rem at 85% -20%, rgba(76, 159, 220, 0.22), transparent 60%),
    radial-gradient(50rem 26rem at 0% 120%, rgba(31, 111, 178, 0.16), transparent 55%),
    var(--navy-950);
  color: var(--white);
  padding: 5rem 0 4.5rem;
  overflow: hidden;
}

.hero-eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-400);
  margin: 0 0 1.25rem;
}

.hero-domain {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.25rem, 6.5vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin: 0 0 1.5rem;
  word-break: break-word;
}

.hero-domain .vs-inline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: 0.08em;
  width: 0.92em;
  height: 0.92em;
  margin: 0 0.06em;
}

.hero-domain .dim { color: rgba(255, 255, 255, 0.55); font-weight: 600; }

.hero-lede {
  max-width: 44rem;
  font-size: 1.1875rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.85);
  margin: 0 0 2.25rem;
}

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
  max-width: 56rem;
}

.hero-chips a {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.hero-chips a:hover {
  background: rgba(76, 159, 220, 0.25);
  border-color: var(--blue-400);
  color: var(--white);
}

.hero-chips .chip-label {
  display: inline-block;
  padding: 0.4rem 0;
  margin-right: 0.35rem;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- Review-page hero (lighter variant) ---------- */

.hero--review { padding: 4rem 0 3.5rem; }

.hero--review .hero-domain { font-size: clamp(2rem, 5.5vw, 3.5rem); }

.breadcrumb {
  font-size: 0.875rem;
  margin: 0 0 1.5rem;
  color: rgba(255, 255, 255, 0.65);
}

.breadcrumb a { color: var(--blue-400); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* ---------- Article ---------- */

.article {
  max-width: var(--article-width);
  margin: 0 auto;
  padding: 4rem 1.25rem 5rem;
}

.article h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
}

.article h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.375rem, 3vw, 1.75rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin: 3rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--blue-100);
}

.article h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1875rem;
  margin: 2rem 0 0.75rem;
  color: var(--navy-800);
}

.article p { margin: 0 0 1.15rem; }

.article ul, .article ol { margin: 0 0 1.25rem; padding-left: 1.4rem; }
.article li { margin-bottom: 0.6rem; }

.article strong { color: var(--navy-950); }

.verdict {
  background: var(--blue-050);
  border-left: 4px solid var(--blue-600);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.1rem 1.35rem;
  margin: 1.5rem 0;
}

.verdict p { margin: 0; }

/* ---------- Tables ---------- */

.table-scroll {
  overflow-x: auto;
  margin: 1.5rem 0 2rem;
  border: 1px solid var(--slate-300);
  border-radius: var(--radius);
  background: var(--white);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  line-height: 1.5;
  min-width: 40rem;
}

caption {
  text-align: left;
  font-weight: 600;
  padding: 0.85rem 1rem 0.25rem;
  color: var(--navy-800);
}

th, td {
  text-align: left;
  vertical-align: top;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--blue-100);
}

thead th {
  background: var(--navy-800);
  color: var(--white);
  font-weight: 600;
  white-space: nowrap;
}

tbody tr:last-child th,
tbody tr:last-child td { border-bottom: none; }

tbody th[scope="row"] {
  font-weight: 600;
  color: var(--navy-950);
  background: var(--blue-050);
  min-width: 9rem;
}

.table-wide table { min-width: 56rem; }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--navy-950);
  color: rgba(255, 255, 255, 0.8);
  padding: 3.5rem 0 2rem;
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 2.5rem;
}

.footer-brand .logo { color: var(--white); }
.footer-brand p {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.6);
  max-width: 20rem;
  margin-top: 1rem;
}

.footer-col h2 {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue-400);
  margin: 0 0 1rem;
}

.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 0.55rem; }

.footer-col a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 0.9375rem;
}

.footer-col a:hover { color: var(--blue-400); text-decoration: underline; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  margin-top: 3rem;
  padding-top: 1.5rem;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- Responsive ---------- */

@media (max-width: 47.9375rem) {
  .hero { padding: 3.5rem 0 3rem; }
  .site-nav { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .article { padding-top: 2.5rem; }
}