:root {
  --ink: #1f2430;
  --muted: #5b6270;
  --line: #e3e6ec;
  --soft: #f6f7f9;
  --bg: #ffffff;
  --accent: #2f5bd3;
  --accent-ink: #ffffff;
  --code-bg: #14171f;
  --code-ink: #e6e9f0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 12px; }
h1 { font-size: clamp(30px, 4.4vw, 46px); letter-spacing: -0.02em; }
h2 { font-size: 26px; letter-spacing: -0.01em; }
h3 { font-size: 17px; }
p { margin: 0 0 14px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); }
section { padding: 64px 0; }
section.soft { background: var(--soft); }
.eyebrow { font-size: 13px; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; }

header.top { border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px; }
.brand { font-weight: 700; font-size: 20px; color: var(--ink); letter-spacing: -0.01em; }
.brand span { color: var(--accent); }
nav a { color: var(--muted); margin-left: 20px; font-size: 15px; }
nav a:hover { color: var(--ink); text-decoration: none; }

.btn {
  display: inline-block; padding: 11px 18px; border-radius: 8px; font-weight: 600; font-size: 15px;
  background: var(--accent); color: var(--accent-ink); border: 1px solid var(--accent);
}
.btn:hover { text-decoration: none; filter: brightness(1.05); }
.btn.ghost { background: var(--bg); color: var(--ink); border-color: var(--line); }

.hero { padding: 72px 0 56px; }
.hero .lead { font-size: 19px; color: var(--muted); max-width: 640px; margin-bottom: 26px; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.hero .note { font-size: 14px; color: var(--muted); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; align-items: center; }

.codecard { background: var(--code-bg); color: var(--code-ink); border-radius: 12px; overflow: hidden; }
.codecard .bar { padding: 10px 14px; font-size: 13px; color: #9aa3b5; border-bottom: 1px solid #262b37; display: flex; justify-content: space-between; }
pre { margin: 0; padding: 16px; overflow-x: auto; font-size: 13px; line-height: 1.55; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.92em; }
p code, li code, td code { background: var(--soft); border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px; }
.copy { background: none; border: 0; color: #9aa3b5; cursor: pointer; font-size: 13px; padding: 0; }
.tablist { display: flex; flex-wrap: wrap; gap: 4px; }
.tablist button { background: none; border: 0; color: #9aa3b5; cursor: pointer; font: inherit; font-size: 13px; padding: 4px 9px; border-radius: 6px; }
.tablist button:hover { color: #fff; }
.tablist button[aria-selected="true"] { color: #fff; background: #262b37; }
.tablist button:focus-visible, .copy:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.copy:hover { color: #fff; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 28px; }
.step { background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.step .n { display: inline-block; width: 28px; height: 28px; line-height: 28px; text-align: center; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 700; margin-bottom: 12px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 28px; }
.card { background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.card p { color: var(--muted); font-size: 15px; margin: 0; }

.points { border-left: 3px solid var(--accent); padding: 4px 0 4px 20px; }
.point + .point { margin-top: 22px; }
.point h3 { font-size: 18px; }
.point p { font-size: 15px; margin: 0; }

.router { border-left: 3px solid var(--accent); padding: 4px 0 4px 20px; max-width: 760px; }
.router p { font-size: 17px; }

.pricing { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 28px; }
.price { border: 1px solid var(--line); border-radius: 12px; padding: 22px; background: var(--bg); }
.price.featured { border-color: var(--accent); }
.price .amount { font-size: 30px; font-weight: 700; letter-spacing: -0.02em; margin: 6px 0; }
.price .amount small { font-size: 14px; color: var(--muted); font-weight: 400; }
.price ul { padding-left: 18px; margin: 12px 0 0; color: var(--muted); font-size: 15px; }
.fine { font-size: 14px; color: var(--muted); margin-top: 16px; }

.cta { text-align: center; }

[hidden] { display: none !important; }
.lead { font-size: 18px; color: var(--muted); max-width: 640px; margin-bottom: 24px; }
.btn { cursor: pointer; font-family: inherit; }
.btn:disabled { opacity: 0.6; cursor: default; }
.btn.small { padding: 5px 10px; font-size: 13px; }
.account { padding: 56px 0 72px; }
.account h2 { font-size: 20px; margin-top: 40px; }
.account-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; }
.account-head > div { min-width: 0; }
#account-email { overflow-wrap: anywhere; }
.notice { border: 1px solid var(--accent); background: #eef3fd; color: var(--ink); border-radius: 8px; padding: 12px 16px; margin: 0 0 24px; }
.notice.bad { border-color: #c2410c; background: #fff4ed; }
.stat { display: flex; flex-direction: column; gap: 4px; border: 1px solid var(--line); border-radius: 12px; padding: 20px 22px; margin: 28px 0 0; max-width: 420px; }
.stat strong { font-size: 36px; letter-spacing: -0.02em; line-height: 1.1; }
.form { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; margin: 12px 0 16px; }
.form label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--muted); flex: 1 1 200px; }
.form input { font: inherit; font-size: 15px; color: var(--ink); padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px; }
.form input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.account #new-key { margin: 0 0 20px; max-width: 720px; }
.account #new-key pre { word-break: break-all; white-space: pre-wrap; }
.terms { border: 1px solid #dfe5f2; border-radius: 10px; padding: 12px 16px; margin: 12px 0; font-size: 14px; background: #fafbff; }
.terms ul { margin: 8px 0; padding-left: 20px; }
.terms .agree { display: flex; gap: 8px; align-items: center; font-weight: 600; }
.packs { display: flex; flex-wrap: wrap; gap: 12px; margin: 12px 0 8px; }
.account table tbody tr td .btn.ghost { color: var(--ink); }
.cta .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 20px; }

footer { border-top: 1px solid var(--line); padding: 28px 0; font-size: 14px; color: var(--muted); }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
footer a { color: var(--muted); margin-right: 16px; }

table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 8px 0 8px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 13px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.docs { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 40px; padding-top: 48px; padding-bottom: 64px; }
.toc { position: sticky; top: 24px; align-self: start; font-size: 15px; }
.toc a { display: block; color: var(--muted); padding: 4px 0; }
.toc a:hover { color: var(--ink); }
.docs section { padding: 0 0 36px; }
.docs h2 { margin-top: 8px; }
.docs pre { border-radius: 10px; margin: 10px 0 18px; background: var(--soft); border: 1px solid var(--line); }
.table-scroll { overflow-x: auto; }

@media (max-width: 860px) {
  .hero-grid, .steps, .grid, .pricing, .docs { grid-template-columns: minmax(0, 1fr); }
  .toc { position: static; display: flex; flex-wrap: wrap; gap: 4px 16px; }
  .docs { gap: 24px; }
  nav a { margin-left: 14px; font-size: 14px; }
  th, td { padding: 8px 8px; }
}

@media (max-width: 560px) {
  header.top .wrap { flex-wrap: wrap; height: auto; padding-top: 12px; padding-bottom: 12px; row-gap: 8px; }
  nav { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 16px; }
  nav a { margin-left: 0; }
  nav a.btn { margin-left: 0 !important; }
}

/* Articles (CR-0053) */
.article { padding: 56px 0 72px; }
.wrap.narrow { max-width: 760px; }
.article h1 { margin-bottom: 14px; }
.article h2 { font-size: 22px; margin-top: 36px; }
.article ul { padding-left: 22px; margin: 0 0 16px; }
.article li { margin-bottom: 8px; }
.article .lead { margin-bottom: 28px; }
.article figure { margin: 28px 0; }
.article figure svg { width: 100%; height: auto; display: block; }
.article figure figcaption { font-size: 13px; margin-top: 8px; }
.article .sources { font-size: 15px; }
.article-end { margin-top: 40px; }
.articles-index { padding: 56px 0 72px; }
.article-grid { grid-template-columns: repeat(3, 1fr); }
.article-card { display: block; color: inherit; }
.article-card:hover { text-decoration: none; border-color: var(--accent); }
.article-card h3 { font-size: 17px; line-height: 1.3; margin: 4px 0 8px; }
.article-card p { font-size: 14px; }
@media (max-width: 860px) {
  .article-grid, .steps, .pricing, .grid { grid-template-columns: 1fr; }
  .hero-grid { grid-template-columns: 1fr; }
}

/* Deep email check page (CR-0098) */
.checkform { display: block; margin-top: 24px; }
.checkform label { display: block; font-weight: 600; margin-bottom: 6px; }
.checkrow { display: flex; gap: 10px; }
.checkrow input { flex: 1; min-width: 0; font-size: 17px; padding: 11px 13px; }
.scorebox { display: flex; gap: 24px; align-items: center; border: 1px solid var(--line); border-radius: 12px; padding: 20px 22px; margin: 8px 0 20px; background: var(--bg); }
.scorebox .score { display: flex; flex-direction: column; align-items: center; min-width: 110px; }
.scorebox .score strong { font-size: 40px; line-height: 1.1; letter-spacing: -0.02em; color: var(--accent); }
.scorebox .score span { font-size: 13px; color: var(--muted); }
.scorebox p { margin: 0 0 4px; }
.verdict { font-weight: 700; font-size: 19px; }
.verdict[data-verdict="likely_invalid"], .checks .st-fail { color: #b42318; }
.verdict[data-verdict="risky"], .verdict[data-verdict="unknown"], .checks .st-warn { color: #b54708; }
.verdict[data-verdict="likely_valid"], .checks .st-pass { color: #067647; }
.checks .st-info, .checks .st-skip { color: var(--muted); }
.checks td { vertical-align: top; }
.checks td:first-child { font-weight: 600; font-size: 13px; white-space: nowrap; }
.checks td.detail { white-space: pre-wrap; word-break: break-word; font-size: 14px; }
@media (max-width: 560px) { .scorebox { flex-direction: column; align-items: flex-start; } .checkrow { flex-direction: column; } }

/* Deep check as the home hero and the highlighted nav link */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.h1 { font-size: clamp(28px, 3.6vw, 38px); letter-spacing: -0.02em; }
nav a.nav-check {
  color: #fff; font-weight: 600; padding: 6px 12px; border-radius: 999px;
  background: linear-gradient(120deg, #2f5bd3 0%, #5b4fd8 55%, #0e9ab8 100%);
  box-shadow: 0 2px 8px rgba(47, 91, 211, 0.28);
}
nav a.nav-check:hover { color: #fff; filter: brightness(1.08); }
nav a.nav-check small { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; opacity: 0.85; margin-left: 2px; }
nav a.nav-check[aria-current="page"] { box-shadow: 0 0 0 2px #fff, 0 0 0 4px #5b4fd8; }
.checkhero {
  padding: 64px 0 60px; color: #fff;
  background: linear-gradient(125deg, #1f3fa8 0%, #2f5bd3 38%, #5b4fd8 72%, #0e9ab8 100%);
}
.checkhero .eyebrow { color: #cfe0ff; }
.checkhero h1 { color: #fff; }
.checkhero .lead { color: #e3eafc; font-size: 18px; max-width: 600px; }
.checkhero .note { font-size: 14px; color: #d6e1fb; margin: 14px 0 0; }
.checkhero .note a { color: #fff; text-decoration: underline; }
.checkhero .note code { background: rgba(255, 255, 255, 0.14); border-color: rgba(255, 255, 255, 0.25); color: #fff; }
.checkhero .checkrow { max-width: 560px; }
.checkhero .checkrow input { font: inherit; font-size: 17px; color: var(--ink); padding: 12px 14px; border: 0; border-radius: 8px; box-shadow: 0 4px 18px rgba(10, 20, 60, 0.25); }
.checkhero .checkrow input:focus { outline: 3px solid #9fd8ff; outline-offset: 1px; }
.checkhero .checkrow .btn { background: #fff; color: #1f3fa8; border-color: #fff; white-space: nowrap; }
.checklist { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.checklist li { background: rgba(255, 255, 255, 0.12); border: 1px solid rgba(255, 255, 255, 0.22); border-radius: 12px; padding: 14px 18px; }
.checklist strong { display: block; font-size: 16px; }
.checklist span { font-size: 14px; color: #d6e1fb; }
@media (max-width: 560px) { .checkhero { padding: 44px 0 40px; } .checkhero .checkrow { flex-direction: column; } }
.article pre { border-radius: 10px; margin: 10px 0 18px; background: var(--soft); border: 1px solid var(--line); }
.article .tbl { margin: 12px 0 18px; }
.article figure img { display: block; }