/* Untrail website — one stylesheet, no external resources.
   Dark is the default look; light applies when the visitor's system prefers it. */

:root {
  color-scheme: dark light;
  --navy: #0e1a2b;
  --bg: #0e1a2b;
  --surface: #15253a;
  --surface-strong: #1b2d45;
  --text: #f5f7fa;
  --muted: #c9d3df;
  --accent: #2bb3a3;
  --accent-text: #2bb3a3;
  --on-accent: #0e1a2b;
  --amber: #f2a93b;
  --note-bg: #2a2416;
  --note-text: #f5f7fa;
  --line: rgba(201, 211, 223, 0.2);
  --focus: #f2a93b;
  --radius: 14px;
  --wrap: 68rem;
  --measure: 42rem;
  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #f5f7fa;
    --surface: #ffffff;
    --surface-strong: #e9eef4;
    --text: #0e1a2b;
    --muted: #3d4b5e;
    --accent: #2bb3a3;
    --accent-text: #17695f;
    --on-accent: #ffffff;
    --note-bg: #fdf1dc;
    --note-text: #0e1a2b;
    --line: #d5dde6;
    --focus: #17695f;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
}

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

a {
  color: var(--accent-text);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 0.15em;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

h1,
h2,
h3 {
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  margin: 0 0 0.5rem;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  margin: 0 0 1rem;
}

h3 {
  font-size: 1.2rem;
  margin: 0 0 0.5rem;
}

p,
ul,
ol,
dl {
  margin: 0 0 1rem;
}

li + li {
  margin-top: 0.35rem;
}

/* Skip link: visible only when focused. */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -10rem;
  z-index: 10;
  padding: 0.6rem 1rem;
  background: var(--surface-strong);
  color: var(--text);
  border-radius: 8px;
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
}

.brand img {
  border-radius: 8px;
}

.site-nav ul,
.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav li + li,
.footer-nav li + li {
  margin-top: 0;
}

.site-nav a,
.footer-nav a {
  display: inline-block;
  padding: 0.35rem 0;
  font-weight: 600;
}

.site-nav a[aria-current="page"] {
  color: var(--text);
  text-decoration: none;
  border-bottom: 2px solid var(--accent);
}

.lang-switch {
  padding: 0.3rem 0.75rem !important;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
}

/* Signature divider: a dotted trail with a gap in the middle. */
.trail {
  height: 6px;
  margin: 0;
  border: 0;
  background-image:
    radial-gradient(circle, var(--accent) 2px, transparent 2.5px);
  background-size: 14px 6px;
  background-repeat: repeat-x;
  -webkit-mask-image: linear-gradient(90deg, #000 0 44%, transparent 44% 56%, #000 56% 100%);
  mask-image: linear-gradient(90deg, #000 0 44%, transparent 44% 56%, #000 56% 100%);
  opacity: 0.75;
}

/* Sections */
main {
  display: block;
}

.section {
  padding: 3.5rem 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section-intro {
  max-width: var(--measure);
  color: var(--muted);
}

/* Hero */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero-icon {
  display: block;
  width: 7.5rem;
  margin: 0 auto 1.5rem;
  border-radius: 26px;
}

.tagline {
  font-size: clamp(1.2rem, 3vw, 1.5rem);
  font-weight: 600;
  color: var(--accent-text);
  margin-bottom: 1.25rem;
}

.lede {
  max-width: 38rem;
  margin: 0 auto 1.75rem;
  font-size: 1.15rem;
  color: var(--muted);
}

.availability {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.55rem 1.2rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: var(--surface);
  font-weight: 600;
}

.fine {
  font-size: 0.95rem;
  color: var(--muted);
}

/* Feature cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16.5rem, 1fr));
  gap: 1rem;
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

.cards > li {
  margin: 0;
  padding: 1.35rem 1.35rem 0.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.cards p {
  color: var(--muted);
}

/* Two-column plan comparison */
.plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.plan {
  padding: 1.5rem 1.5rem 0.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.plan-free {
  border-color: var(--accent);
}

.checklist {
  padding-left: 1.2rem;
}

.checklist li::marker {
  color: var(--accent-text);
}

/* Calm notice, amber instead of red */
.notice {
  max-width: var(--measure);
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: var(--note-bg);
  color: var(--note-text);
  border-left: 5px solid var(--amber);
  border-radius: 8px;
}

.notice p:last-child {
  margin-bottom: 0;
}

.summary-box {
  max-width: var(--measure);
  margin: 0 0 2rem;
  padding: 1.25rem 1.5rem 0.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 5px solid var(--accent);
  border-radius: 8px;
}

/* Long-form pages (privacy, support) */
.doc {
  padding: 3rem 0 3.5rem;
}

.doc-body {
  max-width: var(--measure);
}

.doc-body h2 {
  margin-top: 2.75rem;
  padding-top: 0.5rem;
}

.doc-body h3 {
  margin-top: 1.75rem;
}

.meta {
  color: var(--muted);
  margin-bottom: 2rem;
}

.toc {
  max-width: var(--measure);
  margin: 0 0 2rem;
  padding: 1rem 1.5rem 0.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.toc h2 {
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
  padding: 0;
}

.toc ol {
  padding-left: 1.25rem;
}

dl.facts dt {
  font-weight: 700;
  margin-top: 1rem;
}

dl.facts dd {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

.faq h3 {
  margin-top: 2rem;
}

.path {
  font-weight: 600;
  color: var(--text);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.5rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.site-footer p {
  max-width: var(--measure);
  margin: 0.75rem 0 0;
}

/* Not-found page */
.not-found {
  padding: 5rem 0;
  text-align: center;
}

.not-found .lede {
  margin-bottom: 1rem;
}

@media (max-width: 40rem) {
  body {
    font-size: 1rem;
  }
  .hero {
    padding-top: 2.75rem;
  }
  .section {
    padding: 2.5rem 0;
  }
}

@media print {
  .skip-link,
  .site-nav,
  .trail {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  a {
    color: #000;
  }
}