:root {
  --teal-900: #0d2b38;
  --teal-800: #123c4d;
  --teal-700: #1b4965;
  --teal-600: #206487;
  --teal-500: #2f93b0;
  --teal-400: #4aa9c9;
  --teal-300: #6cc0e8;
  --teal-100: #e4f4fb;

  --bg: #f6f9fb;
  --bg-elevated: #ffffff;
  --text: #10222b;
  --text-muted: #4c6470;
  --border: #dbe7ec;
  --code-bg: #0e2530;
  --code-text: #d6ecf5;
  --code-green: #7be0a8;
  --code-amber: #f0c674;

  --shadow: 0 1px 2px rgba(13, 43, 56, 0.06), 0 8px 24px rgba(13, 43, 56, 0.06);
  --radius: 12px;
  --accent-soft-bg: var(--teal-100);
  --accent-soft-fg: var(--teal-700);
  --callout-bg: var(--teal-100);
  --callout-fg: var(--teal-900);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a161c;
    --bg-elevated: #0f232c;
    --text: #e8f2f6;
    --text-muted: #93aab3;
    --border: #1c3742;
    --code-bg: #071720;
    --code-text: #cfe9f2;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
    --accent-soft-bg: rgba(74, 169, 201, 0.16);
    --accent-soft-fg: var(--teal-300);
    --callout-bg: rgba(74, 169, 201, 0.1);
    --callout-fg: var(--code-text);
  }
}
:root[data-theme="dark"] {
  --bg: #0a161c;
  --bg-elevated: #0f232c;
  --text: #e8f2f6;
  --text-muted: #93aab3;
  --border: #1c3742;
  --code-bg: #071720;
  --code-text: #cfe9f2;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
  --accent-soft-bg: rgba(74, 169, 201, 0.16);
  --accent-soft-fg: var(--teal-300);
  --callout-bg: rgba(74, 169, 201, 0.1);
  --callout-fg: var(--code-text);
}
:root[data-theme="light"] {
  --bg: #f6f9fb;
  --bg-elevated: #ffffff;
  --text: #10222b;
  --text-muted: #4c6470;
  --border: #dbe7ec;
  --code-bg: #0e2530;
  --code-text: #d6ecf5;
  --shadow: 0 1px 2px rgba(13, 43, 56, 0.06), 0 8px 24px rgba(13, 43, 56, 0.06);
  --accent-soft-bg: var(--teal-100);
  --accent-soft-fg: var(--teal-700);
  --callout-bg: var(--teal-100);
  --callout-fg: var(--teal-900);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--teal-500); }
code, pre, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; }

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
@media (max-width: 640px) {
  .wrap { padding-left: 18px; padding-right: 18px; }
}

/* ---------- header ---------- */
header.site {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--text);
}
.brand img { width: 28px; height: 28px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.92rem;
}
.nav-links a { color: var(--text-muted); text-decoration: none; }
.nav-links a:hover { color: var(--text); }
@media (max-width: 640px) {
  .nav-links .nav-page-links { display: none; }
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: inherit;
  font-size: 0.85rem;
  color: var(--text);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  cursor: pointer;
}
.theme-toggle:hover { border-color: var(--teal-400); }

/* ---------- hero ---------- */
.hero {
  padding: 96px 0 80px;
  text-align: center;
}
@media (max-width: 640px) {
  .hero { padding: 64px 0 48px; }
}
.hero img.logo {
  width: 76px;
  height: 76px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}
.hero p.lead {
  max-width: 640px;
  margin: 0 auto 30px;
  color: var(--text-muted);
  font-size: 1.15rem;
}
.badges {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.badges img { height: 20px; display: block; }

.cta {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--teal-500);
  color: #fff;
  box-shadow: 0 4px 14px rgba(47, 147, 176, 0.35);
}
.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
}

/* ---------- sections ---------- */
section { padding: 36px 0; }
section + section { border-top: 1px solid var(--border); }
@media (max-width: 640px) {
  section { padding: 30px 0; }
}
h1.section-title,
h2.section-title {
  font-size: 1.6rem;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
p.section-lead {
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 0 36px;
}
.version-badge {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-soft-fg);
  background: var(--accent-soft-bg);
  padding: 3px 10px;
  border-radius: 999px;
  vertical-align: middle;
}

/* ---------- feature grid ---------- */
.grid3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 760px) {
  .grid3 { grid-template-columns: 1fr; }
}
.grid2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media (max-width: 640px) {
  .grid2 { grid-template-columns: 1fr; }
}
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.card .icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--accent-soft-bg);
  color: var(--accent-soft-fg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  font-size: 1.1rem;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}
.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.94rem;
}

/* ---------- download cards ---------- */
.os-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.os-card:hover {
  transform: translateY(-2px);
  border-color: var(--teal-400);
}
.os-head {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}
.os-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--accent-soft-bg);
  color: var(--accent-soft-fg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
}
.os-icon svg { width: 32px; height: 32px; }
.os-text { min-width: 0; }
.os-card h3 {
  margin: 0 0 4px;
  font-size: 1.15rem;
}
.os-sub {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.os-btn {
  width: 100%;
  justify-content: center;
  box-sizing: border-box;
}
p.download-note {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin: 20px 2px 0;
}

/* ---------- checks table ---------- */
.checks-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
@media (max-width: 700px) {
  .checks-cols { grid-template-columns: 1fr; }
}
.checks-cols h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 0 0 12px;
}
ul.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elevated);
}
ul.check-list li {
  padding: 12px 16px;
  font-size: 0.92rem;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  align-items: baseline;
}
ul.check-list li + li { border-top: 1px solid var(--border); }
ul.check-list li .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal-500);
  flex: none;
  transform: translateY(-2px);
}
ul.check-list li .needs-root {
  margin-left: auto;
  font-size: 0.72rem;
  color: var(--accent-soft-fg);
  background: var(--accent-soft-bg);
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ---------- confidence meter ---------- */
.meter-wrap {
  margin-top: 40px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.meter-track {
  position: relative;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--teal-300) 0%, var(--teal-500) 15%, var(--teal-700) 66%, var(--teal-900) 100%);
  margin: 34px 0 10px;
}
.meter-track .mark {
  position: absolute;
  top: -22px;
  transform: translateX(-50%);
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.meter-track .mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 20px;
  width: 1px;
  height: 8px;
  background: var(--border);
}
.meter-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.meter-labels strong { color: var(--text); }
@media (max-width: 480px) {
  .meter-labels { flex-direction: column; gap: 4px; }
  .meter-track { margin-top: 26px; }
}

/* ---------- screenshots ---------- */
h3.shots-heading {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 0 0 12px;
}
.shots {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.shots.shots-3 { grid-template-columns: repeat(3, 1fr); }
.shots + h3.shots-heading { margin-top: 44px; }
@media (max-width: 760px) {
  .shots.shots-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .shots, .shots.shots-3 { grid-template-columns: 1fr; }
}
figure.shot {
  margin: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
figure.shot img {
  width: 100%;
  display: block;
}
figure.shot figcaption {
  padding: 14px 16px;
  font-size: 0.86rem;
  color: var(--text-muted);
}
figure.shot figcaption strong { color: var(--text); }

/* ---------- code blocks ---------- */
pre.code {
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.6;
  margin: 0;
}
pre.code .c { color: var(--code-green); }
pre.code .amb { color: var(--code-amber); }
.code-block + .code-block { margin-top: 16px; }
.code-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin: 0 0 8px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}
@media (max-width: 760px) {
  .two-col { grid-template-columns: 1fr; }
}

table.flags {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
table.flags th, table.flags td {
  text-align: left;
  padding: 9px 10px;
  border-bottom: 1px solid var(--border);
}
table.flags th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
table.flags td code { font-size: 0.85rem; }

.callout {
  border-left: 3px solid var(--teal-500);
  background: var(--callout-bg);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 20px;
  font-size: 0.92rem;
  color: var(--callout-fg);
}

footer.site {
  padding: 40px 0 60px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
}
footer.site a { color: var(--text-muted); text-decoration: underline; text-underline-offset: 2px; }
footer.site .foot-links {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-top: 10px;
  flex-wrap: wrap;
}

/* ---------- changelog page ---------- */
.changelog-body h1 { display: none; }
.changelog-body h2 {
  font-size: 1.3rem;
  margin: 40px 0 4px;
  letter-spacing: -0.01em;
}
.changelog-body h2:first-child { margin-top: 0; }
.changelog-body h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin: 20px 0 8px;
}
.changelog-body ul {
  margin: 0 0 12px;
  padding-left: 1.2em;
}
.changelog-body li { margin: 4px 0; }
.changelog-body p { margin: 0 0 12px; color: var(--text-muted); }
.changelog-body a { color: var(--teal-500); }
.changelog-body code {
  background: var(--accent-soft-bg);
  color: var(--accent-soft-fg);
  padding: 1px 6px;
  border-radius: 5px;
  font-size: 0.9em;
}
.changelog-loading { color: var(--text-muted); font-size: 0.92rem; }