/* Kastr design system — light + dark */
:root {
  --bg: #FAFAF7;
  --bg-elevated: #FFFFFF;
  --bg-sunk: #F4F2EC;
  --text: #0E0E0C;
  --text-muted: #5A5A55;
  --text-faint: #8A8A82;
  --border: #E5E3DC;
  --border-strong: #D6D3C9;
  --accent: #1F3C4F;
  --accent-ink: #FFFFFF;
  --accent-soft: #E8EFF3;
  --accent-hover: #16303F;
  --danger: #9B3D1F;
  --danger-soft: #F5E7E0;
  --success: #3F6E4F;
  --success-soft: #E4ECE6;
  --shadow-sm: 0 1px 0 rgba(14,14,12,.04);
  --shadow-md: 0 1px 2px rgba(14,14,12,.06), 0 4px 12px rgba(14,14,12,.04);
  --radius: 6px;
  --radius-lg: 10px;
  --font-sans: "Geist", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", "JetBrains Mono", ui-monospace, monospace;
  --maxw: 1200px;
  --maxw-narrow: 720px;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0E0E0C;
  --bg-elevated: #1A1A17;
  --bg-sunk: #161613;
  --text: #FAFAF7;
  --text-muted: #A0A09A;
  --text-faint: #6A6A63;
  --border: #2A2A26;
  --border-strong: #3A3A35;
  --accent: #7CB8D0;
  --accent-ink: #0E0E0C;
  --accent-soft: #1B2A33;
  --accent-hover: #9ACBE0;
  --danger: #D17B5C;
  --danger-soft: #2D1F19;
  --success: #7FB590;
  --success-soft: #1A2620;
  --shadow-sm: 0 1px 0 rgba(0,0,0,.3);
  --shadow-md: 0 1px 2px rgba(0,0,0,.4), 0 4px 12px rgba(0,0,0,.3);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11";
  transition: background 200ms ease, color 200ms ease;
}
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}
p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

.tnum { font-variant-numeric: tabular-nums; }
.mono { font-family: var(--font-mono); }

/* Layout primitives */
.shell { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }
.shell-narrow { max-width: var(--maxw-narrow); margin: 0 auto; padding: 0 32px; }
@media (max-width: 720px) {
  .shell, .shell-narrow { padding: 0 20px; }
}

.section { padding: 96px 0; border-top: 1px solid var(--border); }
.section-tight { padding: 64px 0; border-top: 1px solid var(--border); }
@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .section-tight { padding: 48px 0; }
}

.kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.kicker::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-sans);
  border: 1px solid transparent;
  cursor: default;
  transition: all 120ms ease-out;
  white-space: nowrap;
  line-height: 1;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { background: var(--bg-sunk); border-color: var(--text-faint); }
.btn-ghost { background: transparent; color: var(--text); padding: 8px 12px; }
.btn-ghost:hover { background: var(--bg-sunk); }
.btn-lg { padding: 12px 20px; font-size: 15px; }

/* Cards */
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 120ms ease-out;
}
.card:hover { border-color: var(--border-strong); }

/* Tables */
.tbl {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}
.tbl th, .tbl td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.tbl th {
  font-weight: 500;
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  background: var(--bg-sunk);
}
.tbl tr:last-child td { border-bottom: 0; }
.tbl-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-elevated);
}

/* Pill / tag */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 999px;
  background: var(--bg-sunk);
  color: var(--text-muted);
  border: 1px solid var(--border);
  font-family: var(--font-sans);
}
.pill-accent { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.pill-danger { background: var(--danger-soft); color: var(--danger); border-color: transparent; }
.pill-success { background: var(--success-soft); color: var(--success); border-color: transparent; }

/* Number callout */
.numeral {
  font-family: var(--font-sans);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
  line-height: 0.95;
}

/* Headings scale */
.h-hero {
  font-size: clamp(40px, 6.5vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 600;
}
.h-section {
  font-size: clamp(28px, 3.5vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-weight: 600;
}
.h-sub {
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.4;
  color: var(--text-muted);
  font-weight: 400;
  font-family: var(--font-body);
  letter-spacing: -0.005em;
}

/* Code block */
.code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--bg-sunk);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  white-space: pre;
  overflow-x: auto;
  color: var(--text);
}

/* Underline link */
.link {
  color: var(--text);
  border-bottom: 1px solid var(--border-strong);
  transition: border-color 120ms ease-out;
}
.link:hover { border-bottom-color: var(--text); }
.link-accent { color: var(--accent); border-bottom-color: color-mix(in oklab, var(--accent) 30%, transparent); }
.link-accent:hover { border-bottom-color: var(--accent); }

/* Marquee-of-numbers — decorative */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat-cell {
  padding: 24px 24px 28px;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}
.stat-cell:last-child { border-right: 0; }

/* Browser frame */
.browser {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-md);
}
.browser-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg-sunk);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-faint);
  font-family: var(--font-mono);
}
.browser-dots { display: flex; gap: 6px; }
.browser-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--border-strong); }
.browser-url {
  flex: 1;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 10px;
  color: var(--text-muted);
  font-size: 11px;
}

/* Inputs */
.input, .textarea, .select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  transition: border-color 120ms ease-out, box-shadow 120ms ease-out;
}
.input:focus, .textarea:focus, .select:focus {
  outline: 0;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.textarea { resize: vertical; min-height: 100px; font-family: var(--font-body); }
.field-label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; color: var(--text); }
.field-help { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* Accordion */
.accordion-item { border-bottom: 1px solid var(--border); }
.accordion-item:first-child { border-top: 1px solid var(--border); }
.accordion-q {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  padding: 20px 0;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 500;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  cursor: default;
}
.accordion-a {
  font-size: 15px;
  color: var(--text-muted);
  padding: 0 0 24px;
  max-width: 760px;
  line-height: 1.6;
}

/* Subtle striped placeholder */
.placeholder-stripe {
  background:
    repeating-linear-gradient(135deg,
      transparent 0 12px,
      color-mix(in oklab, var(--text-faint) 18%, transparent) 12px 13px);
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-link {
  padding: 8px 12px;
  font-size: 14px;
  color: var(--text-muted);
  border-radius: var(--radius);
  font-family: var(--font-sans);
}
.nav-link:hover { color: var(--text); background: var(--bg-sunk); }
.nav-link.active { color: var(--text); }
.nav-actions { display: flex; gap: 8px; align-items: center; }

.theme-toggle {
  width: 32px; height: 32px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  border-radius: var(--radius);
  cursor: default;
  color: var(--text-muted);
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }

/* Logo wordmark */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}
.logo-mark {
  width: 22px; height: 22px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 5px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0;
}

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 64px 0 48px; background: var(--bg-sunk); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: 48px;
}
@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
.footer-col h5 { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 14px; font-weight: 500; }
.footer-col a { display: block; padding: 5px 0; font-size: 14px; color: var(--text-muted); }
.footer-col a:hover { color: var(--text); }

/* Compare table */
.cmp-cell-yes { color: var(--success); }
.cmp-cell-partial { color: var(--danger); }
.cmp-cell-no { color: var(--text-faint); }

/* Scroll fade-in (one moment of theatricality) */
.fade-up { opacity: 0; transform: translateY(8px); transition: opacity 600ms ease-out, transform 600ms ease-out; }
.fade-up.in { opacity: 1; transform: translateY(0); }

/* Misc */
.divider { height: 1px; background: var(--border); margin: 32px 0; }
.muted { color: var(--text-muted); }
.faint { color: var(--text-faint); }
.center { text-align: center; }
.eyebrow {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  font-family: var(--font-sans);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* mock chrome */
.console {
  display: grid;
  grid-template-columns: 200px 1fr;
  min-height: 480px;
  font-family: var(--font-body);
  font-size: 13px;
}
.console-side {
  background: var(--bg-sunk);
  border-right: 1px solid var(--border);
  padding: 16px 12px;
}
.console-side-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  padding: 6px 10px 8px;
}
.console-nav-item {
  padding: 7px 10px;
  border-radius: 5px;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  margin-bottom: 1px;
}
.console-nav-item.active { background: var(--bg-elevated); color: var(--text); box-shadow: var(--shadow-sm); }
.console-main { padding: 18px 22px; }

/* hover-list */
.hover-row { transition: background-color 100ms ease-out; }
.hover-row:hover { background: var(--bg-sunk); }

/* keyboard hint */
kbd {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg-sunk);
  border: 1px solid var(--border);
  color: var(--text-muted);
}