/* IPScan.click — design system
   Aesthetic: technical-editorial. Cream paper background, deep indigo ink,
   one warm accent (terracotta). Monospace for IP data, serif for editorial,
   sans for UI. Calm, trustworthy, not generic. */

:root {
  --bg: #f6f3ec;          /* warm cream paper */
  --bg-elev: #ffffff;     /* card */
  --bg-deep: #1a1f3a;     /* deep indigo */
  --ink: #15192b;         /* near-black ink */
  --ink-soft: #4a4f6b;
  --ink-muted: #767b95;
  --rule: #e3ddd0;        /* paper rule */
  --rule-strong: #c9c1ad;
  --accent: #c8462c;      /* terracotta */
  --accent-soft: #f4ddd2;
  --ok: #2f7a4f;
  --warn: #b87b00;
  --err: #b8392c;

  --radius: 4px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px rgba(21,25,43,.04), 0 1px 1px rgba(21,25,43,.02);
  --shadow-md: 0 4px 12px rgba(21,25,43,.06), 0 2px 4px rgba(21,25,43,.03);

  --serif: 'Fraunces', 'Iowan Old Style', 'Palatino', Georgia, serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;

  --container: 1140px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Subtle paper grain for warmth */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(21,25,43,.02) 1px, transparent 0);
  background-size: 4px 4px;
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

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

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; line-height: 1.15; color: var(--ink); margin: 0 0 .6em; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.4rem); font-weight: 500; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.05rem; font-family: var(--sans); font-weight: 600; }

p { margin: 0 0 1em; }

code, pre, .mono { font-family: var(--mono); }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--bg); padding: 8px 12px;
  z-index: 100;
}
.skip:focus { left: 8px; top: 8px; }

/* ---------- Header ---------- */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(8px);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; gap: 32px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--ink); font-weight: 700;
}
.brand-mark { display: inline-flex; color: var(--accent); }
.brand-name { font-family: var(--serif); font-weight: 600; font-size: 1.25rem; letter-spacing: -0.02em; }
.brand-tld { color: var(--ink-muted); font-weight: 400; }

.primary-nav { display: flex; gap: 26px; }
.primary-nav a {
  text-decoration: none; color: var(--ink-soft); font-size: 0.94rem;
  font-weight: 500; padding: 6px 0; position: relative;
}
.primary-nav a:hover { color: var(--ink); }
.primary-nav a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform .2s ease;
}
.primary-nav a:hover::after { transform: scaleX(1); }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--rule); padding: 8px;
  border-radius: var(--radius); cursor: pointer;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); margin: 3px 0; }

@media (max-width: 880px) {
  .primary-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--rule);
    flex-direction: column; padding: 16px 24px; gap: 14px;
  }
  .primary-nav.open { display: flex; }
  .nav-toggle { display: inline-block; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--rule);
  position: relative;
}
.hero-eyebrow {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.18em;
  color: var(--accent); text-transform: uppercase; margin-bottom: 18px;
}
.hero h1 { max-width: 18ch; margin-bottom: 24px; }
.hero h1 em { font-style: italic; font-weight: 400; color: var(--accent); }
.hero-lede {
  font-family: var(--serif); font-size: 1.25rem; line-height: 1.55;
  color: var(--ink-soft); max-width: 58ch; margin-bottom: 32px;
}

/* Lookup card */
.lookup-card {
  background: var(--bg-elev);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  max-width: 720px;
}
.lookup-card-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 16px;
}
.lookup-card-head strong { font-family: var(--serif); font-size: 1.15rem; }
.your-ip-pill {
  font-family: var(--mono); font-size: 0.82rem;
  background: var(--bg); padding: 4px 10px; border-radius: 100px;
  border: 1px solid var(--rule); color: var(--ink-soft);
}

.lookup-form { display: flex; gap: 10px; }
.lookup-input {
  flex: 1; padding: 14px 16px;
  font-family: var(--mono); font-size: 1rem;
  background: var(--bg);
  border: 1px solid var(--rule-strong); border-radius: var(--radius);
  color: var(--ink);
  transition: border-color .15s, box-shadow .15s;
}
.lookup-input:focus {
  outline: none;
  border-color: var(--bg-deep);
  box-shadow: 0 0 0 3px rgba(26,31,58,0.1);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 22px; border-radius: var(--radius); font-weight: 600;
  font-family: var(--sans); font-size: 0.95rem; cursor: pointer;
  text-decoration: none; border: 1px solid transparent;
  transition: all .15s ease;
}
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { background: var(--bg-deep); color: var(--bg); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--rule-strong); }
.btn-ghost:hover { background: var(--bg-elev); color: var(--ink); }
.btn-accent { background: var(--accent); color: white; }
.btn-accent:hover { background: #a23822; color: white; }

/* ---------- Sections ---------- */
section { padding: 64px 0; position: relative; }
.section-head { margin-bottom: 40px; max-width: 720px; }
.section-eyebrow {
  font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.18em;
  color: var(--ink-muted); text-transform: uppercase; margin-bottom: 12px;
}
.section-lede { color: var(--ink-soft); font-size: 1.05rem; max-width: 60ch; }

/* Feature grid */
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--rule); border: 1px solid var(--rule);
  border-radius: var(--radius-lg); overflow: hidden;
}
.feature {
  padding: 28px 26px; background: var(--bg-elev);
  display: flex; flex-direction: column; gap: 10px;
}
.feature-num {
  font-family: var(--mono); font-size: 0.78rem; color: var(--accent);
  letter-spacing: 0.1em;
}
.feature h3 { margin: 0; font-size: 1.15rem; font-family: var(--serif); }
.feature p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }
@media (max-width: 800px) { .feature-grid { grid-template-columns: 1fr; } }

/* Tool grid */
.tool-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
.tool-card {
  background: var(--bg-elev); border: 1px solid var(--rule); border-radius: var(--radius-lg);
  padding: 24px; text-decoration: none; color: var(--ink);
  display: flex; flex-direction: column; gap: 8px;
  transition: transform .15s, border-color .15s, box-shadow .15s;
}
.tool-card:hover {
  transform: translateY(-2px); border-color: var(--ink);
  box-shadow: var(--shadow-md); color: var(--ink);
}
.tool-card h3 { margin: 0; font-size: 1.1rem; }
.tool-card p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }
.tool-card .arrow {
  font-family: var(--mono); color: var(--accent); margin-top: 8px;
  font-size: 0.85rem; letter-spacing: 0.1em;
}

/* Result panel */
.result {
  background: var(--bg-elev); border: 1px solid var(--rule-strong);
  border-radius: var(--radius-lg); padding: 32px; margin-top: 32px;
  box-shadow: var(--shadow-sm);
}
.result-head {
  display: flex; justify-content: space-between; align-items: baseline;
  border-bottom: 1px solid var(--rule); padding-bottom: 16px; margin-bottom: 24px;
  flex-wrap: wrap; gap: 12px;
}
.result-ip { font-family: var(--mono); font-size: 1.6rem; font-weight: 500; color: var(--bg-deep); }
.result-flag { font-size: 1.6rem; }

.kv-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; }
@media (max-width: 700px) { .kv-grid { grid-template-columns: 1fr; } }
.kv {
  display: grid; grid-template-columns: 140px 1fr;
  padding: 12px 0; border-bottom: 1px dashed var(--rule);
  font-size: 0.95rem;
}
.kv-key {
  font-family: var(--mono); font-size: 0.78rem; color: var(--ink-muted);
  text-transform: uppercase; letter-spacing: 0.08em; padding-top: 2px;
}
.kv-val { font-family: var(--mono); color: var(--ink); word-break: break-word; }
.kv-val.text { font-family: var(--sans); }

.badge {
  display: inline-block; padding: 2px 8px; border-radius: 100px;
  font-size: 0.75rem; font-family: var(--mono);
}
.badge-ok { background: #e2efe7; color: var(--ok); }
.badge-warn { background: #fbecd2; color: var(--warn); }
.badge-err { background: #f7dcd7; color: var(--err); }

/* ---------- Editorial / article ---------- */
.article-hero {
  padding: 56px 0 24px; border-bottom: 1px solid var(--rule);
}
.article-meta {
  font-family: var(--mono); font-size: 0.8rem; color: var(--ink-muted);
  letter-spacing: 0.05em; margin-bottom: 14px;
}
.article-meta a { color: var(--ink-muted); }
.article-title { font-size: clamp(1.8rem, 4vw, 2.8rem); max-width: 22ch; margin-bottom: 18px; }
.article-lede {
  font-family: var(--serif); font-size: 1.25rem; line-height: 1.55;
  color: var(--ink-soft); max-width: 62ch;
}

.article-body {
  padding: 48px 0;
  max-width: 700px; margin: 0 auto;
  font-family: var(--serif); font-size: 1.12rem; line-height: 1.75;
  color: var(--ink);
}
.article-body h2 {
  margin-top: 2.4em; margin-bottom: 0.5em;
  font-size: 1.7rem;
  padding-top: 0.6em;
  border-top: 1px solid var(--rule);
}
.article-body h3 { margin-top: 1.8em; font-size: 1.25rem; }
.article-body p { margin: 0 0 1.2em; }
.article-body ul, .article-body ol { padding-left: 1.2em; margin: 0 0 1.2em; }
.article-body li { margin-bottom: 0.5em; }
.article-body a { color: var(--accent); }
.article-body blockquote {
  border-left: 3px solid var(--accent); padding: 4px 0 4px 18px;
  margin: 1.5em 0; color: var(--ink-soft); font-style: italic;
}
.article-body code {
  background: var(--bg); padding: 2px 6px; border-radius: 3px;
  font-size: 0.92em; border: 1px solid var(--rule);
}
.article-body pre {
  background: var(--ink); color: var(--bg); padding: 18px;
  border-radius: var(--radius); overflow-x: auto; font-size: 0.88rem;
  margin: 1.5em 0;
}
.article-body pre code { background: none; border: none; color: inherit; padding: 0; }
.article-body table {
  border-collapse: collapse; width: 100%; margin: 1.5em 0;
  font-family: var(--sans); font-size: 0.95rem;
}
.article-body th, .article-body td {
  border: 1px solid var(--rule); padding: 10px 14px; text-align: left;
}
.article-body th { background: var(--bg); font-weight: 600; }

.callout {
  background: var(--accent-soft); border-left: 3px solid var(--accent);
  padding: 18px 22px; border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.8em 0; font-family: var(--sans); font-size: 1rem;
}
.callout strong { display: block; margin-bottom: 4px; }

/* Blog index */
.post-list { display: flex; flex-direction: column; }
.post-item {
  display: grid; grid-template-columns: 160px 1fr; gap: 32px;
  padding: 28px 0; border-bottom: 1px solid var(--rule);
  text-decoration: none; color: var(--ink);
}
.post-item:hover { color: var(--ink); }
.post-item:hover h2 { color: var(--accent); }
.post-date {
  font-family: var(--mono); font-size: 0.82rem; color: var(--ink-muted);
  letter-spacing: 0.05em;
}
.post-item h2 { font-size: 1.4rem; margin: 0 0 8px; transition: color .15s; }
.post-excerpt { color: var(--ink-soft); margin: 0; font-size: 0.97rem; }
@media (max-width: 680px) {
  .post-item { grid-template-columns: 1fr; gap: 8px; }
}

/* Ad slot */
.ad-slot {
  margin: 32px 0; padding: 12px;
  background: var(--bg-elev); border: 1px dashed var(--rule-strong);
  border-radius: var(--radius); text-align: center;
  font-family: var(--mono); font-size: 0.75rem; color: var(--ink-muted);
  letter-spacing: 0.15em; text-transform: uppercase;
  min-height: 96px; display: flex; align-items: center; justify-content: center;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-deep); color: #d3d6e0; padding: 56px 0 24px;
  margin-top: 80px;
}
.site-footer .brand { color: #fff; }
.site-footer .brand-mark { color: var(--accent); }
.site-footer .brand-tld { color: #8e94ad; }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 40px;
  padding-bottom: 32px; border-bottom: 1px solid #2a3055;
}
.footer-tag { color: #9ea3b8; font-size: 0.92rem; margin-top: 12px; max-width: 38ch; }
.footer-col h4 { color: #fff; font-size: 0.85rem; text-transform: uppercase;
  letter-spacing: 0.12em; margin-bottom: 14px; font-family: var(--sans); }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: #b6bbcf; text-decoration: none; font-size: 0.92rem; }
.footer-col a:hover { color: #fff; }
.footer-bottom { padding-top: 24px; font-size: 0.85rem; color: #8e94ad; }
@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-brand { grid-column: 1 / -1; }
}

/* ---------- Cookie banner ---------- */
.cookie-banner {
  position: fixed; left: 16px; right: 16px; bottom: 16px;
  background: var(--ink); color: #e9eaf2;
  padding: 18px 0; border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(0,0,0,.2); z-index: 60;
  max-width: 720px; margin: 0 auto;
}
.cookie-inner {
  display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center;
}
.cookie-text strong { color: #fff; }
.cookie-text p { margin: 4px 0 0; font-size: 0.92rem; color: #c8ccdc; }
.cookie-text a { color: #fff; }
.cookie-actions { display: flex; gap: 10px; }
.cookie-banner .btn-ghost { color: #fff; border-color: #41476a; }
.cookie-banner .btn-ghost:hover { background: #2a3055; color: #fff; }
.cookie-banner .btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.cookie-banner .btn-primary:hover { background: #a23822; }
@media (max-width: 640px) {
  .cookie-inner { grid-template-columns: 1fr; }
}

/* ---------- Utility ---------- */
.muted { color: var(--ink-muted); }
.alert {
  padding: 14px 18px; border-radius: var(--radius); margin: 16px 0;
  border: 1px solid;
}
.alert-err { background: #fbe6e1; border-color: var(--err); color: var(--err); }
.alert-info { background: #e6ebf7; border-color: #3a4a8f; color: #2a3870; }

/* Print niceties */
@media print {
  .site-header, .site-footer, .cookie-banner, .ad-slot { display: none; }
}