/* Kwest blog — shares brand tokens with src/web/src/styles.css (accent
   #2E5CFF, ink #10151F, Space Grotesk / Inter / JetBrains Mono) but is a
   separate, hand-authored stylesheet: the blog is static HTML with no build
   step and never imports the app bundle. */
:root {
  --accent: #2E5CFF;
  --accent-2: #1E3FCC;
  --accent-ink: #FFFFFF;
  --ink: #10151F;
  --border: #E3E7EC;
  --bg: #F5F7FA;
  --card: #FFFFFF;
  --card-2: #F3F5F7;
  --muted: #6B7280;
  --green: #16A34A;
  --green-bg: #DCFCE7;
  --amber: #F59E0B;
  --shadow-sm: 0 1px 2px rgba(16, 21, 31, 0.05);
  --shadow-md: 0 4px 16px rgba(16, 21, 31, 0.08);
  --shadow-lg: 0 12px 32px rgba(16, 21, 31, 0.16);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #F1F4F9;
    --border: #262C38;
    --bg: #0B0E14;
    --card: #151A24;
    --card-2: #1B212D;
    --muted: #8892A4;
    --green-bg: #0F2A1B;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.55);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; letter-spacing: -0.01em; }
code, .mono { font-family: var(--font-mono); }

.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }

/* ---------- site header / footer ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; padding-top: 14px; padding-bottom: 14px; max-width: 1040px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 18px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand .mark { width: 30px; height: 30px; border-radius: 22%; box-shadow: 0 4px 14px rgba(30, 63, 204, 0.35); }
.nav-links { display: flex; gap: 20px; align-items: center; font-size: 14px; font-weight: 600; }
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: var(--accent-ink) !important;
  font-weight: 700; font-size: 14px; padding: 10px 18px;
  border-radius: 999px; box-shadow: var(--shadow-md);
  text-decoration: none !important; border: none; cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.btn.ghost { background: transparent; color: var(--ink) !important; border: 1px solid var(--border); box-shadow: none; }

.site-footer { border-top: 1px solid var(--border); margin-top: 80px; padding: 40px 0 60px; color: var(--muted); font-size: 14px; }
.site-footer .wrap { max-width: 1040px; display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; }
.site-footer a { color: var(--muted); }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }

/* ---------- hero / index listing ---------- */
.hero { max-width: 1040px; margin: 0 auto; padding: 56px 20px 24px; text-align: center; }
.hero h1 { font-size: clamp(30px, 4.4vw, 46px); margin: 0 0 14px; }
.hero p.lede { color: var(--muted); font-size: 18px; max-width: 640px; margin: 0 auto 26px; }
.hero-ctas { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.post-grid { max-width: 1040px; margin: 40px auto 0; padding: 0 20px; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }
.post-card {
  display: block; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 22px; box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease; color: var(--ink) !important;
}
.post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); text-decoration: none; }
.post-card .tag { display: inline-block; font-size: 12px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 10px; }
.post-card h3 { margin: 0 0 8px; font-size: 19px; }
.post-card p { margin: 0; color: var(--muted); font-size: 14px; }
.post-card .read-time { display: block; margin-top: 14px; font-size: 12px; color: var(--muted); }

/* ---------- article ---------- */
article.post { max-width: 720px; margin: 0 auto; padding: 44px 20px 20px; }
.post-meta { color: var(--muted); font-size: 14px; margin-bottom: 10px; }
.post-meta .tag { color: var(--accent); font-weight: 700; }
article.post h1 { font-size: clamp(28px, 4vw, 40px); margin: 0 0 20px; }
article.post h2 { font-size: 24px; margin: 44px 0 14px; }
article.post h3 { font-size: 19px; margin: 30px 0 10px; }
article.post p { margin: 0 0 16px; }
article.post ul, article.post ol { margin: 0 0 16px; padding-left: 22px; }
article.post li { margin-bottom: 8px; }
article.post .lede { font-size: 19px; color: var(--muted); margin-bottom: 30px; }
article.post blockquote { margin: 24px 0; padding: 4px 20px; border-left: 3px solid var(--accent); color: var(--muted); font-style: italic; }

.callout { background: var(--card-2); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 18px 20px; margin: 24px 0; font-size: 15px; }
.callout strong { color: var(--accent); }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.chip { background: var(--card-2); border: 1px solid var(--border); border-radius: 999px; padding: 6px 14px; font-size: 13px; font-weight: 600; }
.chip.on { background: var(--accent); color: #fff; border-color: var(--accent); }

table.spec { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; }
table.spec th, table.spec td { border-bottom: 1px solid var(--border); padding: 10px 12px; text-align: left; }
table.spec th { color: var(--muted); font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }

.cta-block { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border-radius: var(--radius-lg); padding: 34px; text-align: center; margin: 44px 0; }
.cta-block h3 { color: #fff; margin: 0 0 8px; }
.cta-block p { color: rgba(255,255,255,0.85); margin: 0 0 18px; }
.cta-block .btn { background: #fff; color: var(--accent) !important; }
.cta-block .btn:hover { color: var(--accent-2) !important; }

.related { margin-top: 56px; padding-top: 30px; border-top: 1px solid var(--border); }
.related h2 { margin-top: 0; }

/* ---------- interactive phone mockups (mimic the real app screens) ---------- */
.phone {
  width: 300px; max-width: 100%; margin: 30px auto; background: var(--bg);
  border: 8px solid var(--ink); border-radius: 40px; box-shadow: var(--shadow-lg);
  overflow: hidden; position: relative;
}
.phone .screen { background: var(--bg); min-height: 480px; padding: 16px 14px 20px; }
.phone .notch { height: 22px; display: flex; align-items: center; justify-content: center; }
.phone .notch::before { content: ''; width: 90px; height: 8px; border-radius: 6px; background: var(--ink); opacity: 0.15; }
.phone-caption { text-align: center; color: var(--muted); font-size: 13px; margin-top: -14px; margin-bottom: 30px; }

.mock-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 14px; margin-bottom: 10px; box-shadow: var(--shadow-sm); }
.mock-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.mock-h { font-family: var(--font-display); font-weight: 700; font-size: 15px; }
.mock-sub { color: var(--muted); font-size: 12px; }
.mock-bar { height: 8px; border-radius: 6px; background: var(--card-2); overflow: hidden; margin-top: 8px; }
.mock-bar > span { display: block; height: 100%; background: var(--accent); border-radius: 6px; }
.mock-pill { font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 999px; background: var(--green-bg); color: var(--green); }
.mock-tabs { display: flex; gap: 6px; margin-bottom: 12px; overflow-x: auto; }
.mock-tab { flex: none; background: var(--card); border: 1px solid var(--border); border-radius: 999px; padding: 7px 13px; font-size: 12px; font-weight: 700; cursor: pointer; color: var(--muted); }
.mock-tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.mock-metric { text-align: center; }
.mock-metric .v { font-family: var(--font-mono); font-size: 22px; font-weight: 700; color: var(--accent); }
.mock-metric .l { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.mock-grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 10px 0; }
.mock-toggle { width: 42px; height: 24px; border-radius: 999px; background: var(--card-2); border: 1px solid var(--border); position: relative; cursor: pointer; flex: none; }
.mock-toggle::after { content: ''; position: absolute; top: 2px; left: 2px; width: 18px; height: 18px; border-radius: 50%; background: var(--muted); transition: transform 0.15s ease, background 0.15s ease; }
.mock-toggle.on { background: var(--accent); border-color: var(--accent); }
.mock-toggle.on::after { transform: translateX(18px); background: #fff; }
.mock-spark { display: flex; align-items: flex-end; gap: 3px; height: 40px; margin-top: 8px; }
.mock-spark i { flex: 1; background: var(--accent); opacity: 0.85; border-radius: 2px 2px 0 0; }

@media (max-width: 640px) {
  .nav-links { display: none; }
  .site-header .wrap { padding-top: 12px; padding-bottom: 12px; }
}