:root {
  --bg: #f7f5f0;
  --paper: #ffffff;
  --ink: #15171c;
  --muted: #5b616e;
  --line: #e2ded4;
  --accent: #1f6f4a;
  --accent-soft: #e4f0e9;
  --stop: #a3341f;
  --stop-soft: #f6e6e1;
  --term-bg: #12151a;
  --term-fg: #d6dbe3;
  --term-dim: #7b8494;
  --term-ok: #7fd1a4;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
}

a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }

.wrap {
  max-width: 68rem;
  margin: 0 auto;
  padding-inline: 1.25rem;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-block: 1rem;
}
.logo {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo span { color: var(--accent); }
.nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}
.nav a:hover { color: var(--ink); }

/* Hero */
.hero { padding-block: 4.5rem 3.5rem; }
.hero .wrap {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}
h1 {
  font-size: clamp(2.1rem, 4.6vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 1.25rem;
  text-wrap: balance;
}
.lede {
  font-size: 1.15rem;
  color: var(--muted);
  margin: 0 0 2rem;
  max-width: 34rem;
}
.cta-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 0.8rem 1.25rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid var(--ink);
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: #000; }
.btn-ghost { color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--paper); }

/* SMTP transcript */
.term {
  background: var(--term-bg);
  color: var(--term-fg);
  border-radius: 10px;
  padding: 1.25rem 1.4rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.75;
  overflow-x: auto;
  box-shadow: 0 20px 40px -24px rgba(0, 0, 0, 0.45);
}
.term .dots { display: flex; gap: 6px; margin-bottom: 0.9rem; }
.term .dots i { width: 10px; height: 10px; border-radius: 50%; background: #2b3039; }
.term pre { margin: 0; font: inherit; white-space: pre; }
.hero .wrap > *, .grid-2 > *, .grid-3 > * { min-width: 0; }
.term .c { color: var(--term-dim); }
.term .s { color: var(--term-ok); }

/* Sections */
section { padding-block: 3.5rem; }
section.alt { background: var(--paper); border-block: 1px solid var(--line); }
h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}
.section-intro { color: var(--muted); max-width: 42rem; margin: 0 0 2.25rem; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.5rem;
}
section.alt .card { background: var(--bg); }
.card h3 { margin: 0 0 0.5rem; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.list-card h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1rem;
  font-size: 1.05rem;
}
.tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  letter-spacing: 0.04em;
}
.tag.ok { background: var(--accent-soft); color: var(--accent); }
.tag.no { background: var(--stop-soft); color: var(--stop); }
.list-card ul { margin: 0; padding-left: 1.1rem; }
.list-card li { margin-bottom: 0.45rem; color: var(--muted); font-size: 0.95rem; }
.list-card li strong { color: var(--ink); font-weight: 600; }

.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
  align-items: start;
}
.steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  padding-top: 0.2rem;
}
.steps h3 { margin: 0 0 0.25rem; font-size: 1.05rem; }
.steps p { margin: 0; color: var(--muted); font-size: 0.95rem; }

table.thresholds {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.table-scroll { overflow-x: auto; }
table.thresholds th, table.thresholds td {
  text-align: left;
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.thresholds th {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}
table.thresholds td:first-child { font-weight: 600; white-space: nowrap; }

.contact-box {
  background: var(--ink);
  color: #fff;
  border-radius: 10px;
  padding: 2.5rem;
}
.contact-box h2 { color: #fff; }
.contact-box p { color: #b9bec8; max-width: 40rem; }
.contact-box a { color: #fff; }
.contact-box .btn { border-color: #fff; background: #fff; color: var(--ink); margin-top: 0.5rem; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 2rem 3rem;
  font-size: 0.88rem;
  color: var(--muted);
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem 2rem;
  flex-wrap: wrap;
}
.site-footer nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }

/* Legal pages */
.legal { padding-block: 3.5rem 5rem; }
.legal .wrap { max-width: 46rem; }
.legal h1 { font-size: clamp(1.9rem, 4vw, 2.5rem); }
.legal h2 { font-size: 1.2rem; margin-top: 2.25rem; }
.legal p, .legal li { color: #333842; }
.legal .updated { color: var(--muted); font-family: var(--mono); font-size: 0.8rem; }

@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 2.5rem; }
  .grid-3 { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .grid-2 { grid-template-columns: 1fr; }
  .hero { padding-block: 3rem 2.5rem; }
  .contact-box { padding: 1.75rem; }
}