/* KUSTOD — "Honest Tool" aesthetic. Light, clean, README-come-to-life. */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #F7F6F2;          /* warm paper */
  --surface: #FFFFFF;     /* cards / code boxes */
  --ink: #1A1A1A;         /* primary text */
  --dim: #6B6862;         /* secondary text */
  --border: #E4E2DB;

  /* ONE accent var — swap live. Ink-blue (Architect's pick).
     Options: highlighter-yellow #F5D90A (ink text) · pine-green #1F8A4C (white text) */
  --accent: #2D5BFF;
  --accent-ink: #FFFFFF;  /* text on accent — white on blue/green, ink on yellow */
  --cta-text: #F5D90A;    /* punch text for CTA buttons — yellow on ink-blue */

  /* highlighter band — tinted so ink text stays readable on any accent */
  --mark: color-mix(in srgb, var(--accent) 30%, transparent);

  --radius: 10px;
  --maxw: 860px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent); color: var(--accent-ink); }

.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; }

/* === LAYOUT === */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
section { padding: 72px 0; }
section + section { border-top: 1px solid var(--border); }

a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px;
    text-decoration-color: var(--accent); text-decoration-thickness: 2px; }
a:hover { text-decoration-thickness: 3px; }

/* === A11Y === */
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--ink); color: #fff; padding: 10px 18px;
  font-family: 'JetBrains Mono', monospace; font-size: 13px; text-decoration: none;
}
.skip-link:focus { left: 8px; top: 8px; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 3px;
}

/* === NAV === */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(247,246,242,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
nav .container { display: flex; align-items: center; justify-content: space-between; }
.wordmark {
  font-family: 'JetBrains Mono', monospace; font-weight: 700;
  font-size: 18px; letter-spacing: 1px; color: var(--ink);
  text-decoration: none; display: inline-flex; align-items: baseline; gap: 8px;
}
.wordmark .v { font-size: 11px; color: var(--dim); font-weight: 400; }
.wordmark::before {
  content: '▸'; color: var(--ink);
  background: var(--accent); padding: 1px 6px; border-radius: 4px; margin-right: 4px;
}
.nav-links { display: flex; gap: 18px; align-items: center; }
.nav-links a {
  font-family: 'JetBrains Mono', monospace; font-size: 13px;
  text-decoration: none; color: var(--dim);
}
.nav-links a:hover { color: var(--ink); }
.lang-switch { color: var(--dim); }
.lang-switch[aria-current="true"] { color: var(--ink); font-weight: 700; }

/* === BUTTONS === */
.btn {
  display: inline-block; font-family: 'JetBrains Mono', monospace;
  font-size: 14px; font-weight: 700; letter-spacing: 0.3px;
  padding: 14px 22px; border-radius: var(--radius);
  text-decoration: none; cursor: pointer; border: 2px solid var(--ink);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn-primary { background: var(--accent); color: var(--cta-text); border-color: var(--ink); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 4px 4px 0 var(--ink); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { transform: translateY(-2px); box-shadow: 4px 4px 0 var(--ink); }
/* higher specificity than `.nav-links a` so the CTA text wins (yellow, not dim) */
.nav-links a.nav-cta {
  font-family: 'JetBrains Mono', monospace; font-size: 13px; font-weight: 700;
  background: var(--accent); color: var(--cta-text);
  padding: 8px 14px; border-radius: 8px; text-decoration: none;
  border: 2px solid var(--ink);
}
.nav-links a.nav-cta:hover { color: var(--cta-text); box-shadow: 3px 3px 0 var(--ink); }

/* === HERO === */
.hero { padding: 96px 0 80px; }
.hero h1 {
  font-size: clamp(38px, 6vw, 60px); font-weight: 800; line-height: 1.05;
  letter-spacing: -1.5px; margin-bottom: 22px; max-width: 13ch;
}
.hero h1 .mark {
  background: linear-gradient(transparent 60%, var(--mark) 60%);
  padding: 0 2px;
}
.hero-sub { font-size: 21px; color: var(--dim); max-width: 52ch; margin-bottom: 26px; }
.hero-micro {
  font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--dim);
  margin-bottom: 34px; letter-spacing: 0.2px;
}
.hero-micro .dot { color: var(--accent); -webkit-text-fill-color: initial; margin: 0 6px; }
.hero-cta-row { display: flex; gap: 14px; flex-wrap: wrap; }

/* === SECTION HEADINGS === */
.eyebrow {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 500;
  letter-spacing: 2px; text-transform: uppercase; color: var(--dim); margin-bottom: 14px;
}
h2 {
  font-size: clamp(28px, 4vw, 38px); font-weight: 800; line-height: 1.12;
  letter-spacing: -0.8px; margin-bottom: 20px; max-width: 18ch;
}
.lead { font-size: 18px; color: var(--dim); max-width: 60ch; margin-bottom: 8px; }

/* === ONE-LINER (blockquote) === */
.oneliner { padding: 80px 0; }
.oneliner blockquote {
  font-size: clamp(22px, 3.4vw, 30px); font-weight: 600; line-height: 1.4;
  letter-spacing: -0.4px; max-width: 24ch; margin: 0 auto; text-align: center;
}
.oneliner blockquote .mark {
  background: linear-gradient(transparent 60%, var(--mark) 60%); padding: 0 3px;
}

/* === 4-UP / 3-UP GRIDS === */
.grid-4 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 12px; }
@media (max-width: 700px) {
  .grid-4, .grid-3 { grid-template-columns: 1fr; }
}
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px 24px;
}
.card .num {
  font-family: 'JetBrains Mono', monospace; font-size: 13px; font-weight: 700;
  color: var(--accent-ink); background: var(--accent);
  width: 28px; height: 28px; border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center; margin-bottom: 14px;
}
.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 6px; letter-spacing: -0.3px; }
.card p { font-size: 15px; color: var(--dim); line-height: 1.55; }
.card .emoji { font-size: 26px; display: block; margin-bottom: 12px; }
.card .who { font-size: 13px; font-family: 'JetBrains Mono', monospace; color: var(--dim); margin-bottom: 10px; }
.card .start { font-size: 14px; }

/* === THE SPINE — chat exchange ⭐ === */
.spine { background: var(--surface); }
.chat { max-width: 620px; margin: 36px 0 0; display: flex; flex-direction: column; gap: 14px; }
.bubble {
  border-radius: 14px; padding: 16px 18px; font-size: 16px; line-height: 1.5;
  position: relative; max-width: 88%;
}
.bubble .who {
  font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase; display: block; margin-bottom: 6px; color: var(--dim);
}
.bubble.you { background: var(--bg); border: 1px solid var(--border); align-self: flex-start; }
.bubble.kustod {
  background: var(--surface); border: 1px solid var(--ink);
  align-self: flex-end; box-shadow: -4px 4px 0 var(--accent);
}
.bubble.kustod .who { color: var(--ink); }

/* === CODE / PASTE-PROMPT === */
.code-wrap { margin-top: 28px; position: relative; }
.code-head {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--ink); color: #fff; border-radius: var(--radius) var(--radius) 0 0;
  padding: 10px 14px; font-family: 'JetBrains Mono', monospace; font-size: 12px;
}
.code-head .dots { color: #888; }
.copy-btn {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 700;
  background: var(--accent); color: var(--accent-ink); border: none;
  padding: 5px 12px; border-radius: 6px; cursor: pointer;
}
.copy-btn:hover { filter: brightness(0.95); }
.copy-btn.copied { background: #1F8A4C; color: #fff; }
pre.code {
  background: #111; color: #eee; border-radius: 0 0 var(--radius) var(--radius);
  padding: 20px; overflow-x: auto; font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px; line-height: 1.6; white-space: pre-wrap; word-break: break-word;
}
pre.code .ph { color: var(--accent); }
.code-micro { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--dim); margin-top: 12px; }

/* === MEMORY panel === */
.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 24px; margin-top: 24px; max-width: 520px;
}
.panel .panel-head {
  font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--dim);
  letter-spacing: 1px; text-transform: uppercase; margin-bottom: 12px;
}
.panel ul { list-style: none; }
.panel li { font-size: 15px; padding: 5px 0 5px 22px; position: relative; color: var(--ink); }
.panel li::before { content: '▸'; position: absolute; left: 0; color: var(--accent-ink);
  background: var(--accent); border-radius: 3px; padding: 0 4px; font-size: 11px; }

/* === 7-DAY TEST === */
.days { list-style: none; counter-reset: day; margin-top: 8px; }
.days li {
  font-size: 16px; padding: 10px 0 10px 44px; position: relative;
  border-bottom: 1px solid var(--border);
}
.days li:last-child { border-bottom: none; }
.days li::before {
  counter-increment: day; content: 'D' counter(day);
  position: absolute; left: 0; top: 10px;
  font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 700;
  color: var(--accent-ink); background: var(--accent); padding: 2px 7px; border-radius: 5px;
}
.metric {
  margin-top: 40px; padding: 28px; border: 2px solid var(--ink); border-radius: var(--radius);
  background: var(--surface); position: relative;
}
.metric .q {
  font-size: clamp(20px, 3vw, 26px); font-weight: 700; line-height: 1.35; letter-spacing: -0.4px;
}
.metric .q .mark { background: linear-gradient(transparent 60%, var(--mark) 60%); padding: 0 3px; }
.metric .sub { font-size: 15px; color: var(--dim); margin-top: 10px; }

/* === FINAL CTA === */
.final { text-align: center; padding: 96px 0; }
.final h2 { margin: 0 auto 24px; max-width: none; }
.final .btn { font-size: 16px; padding: 16px 28px; }
.final .funnel { font-size: 16px; color: var(--dim); margin-top: 28px; max-width: 48ch; margin-left: auto; margin-right: auto; }
.final .positioning {
  font-family: 'JetBrains Mono', monospace; font-size: 14px; color: var(--ink);
  margin-top: 18px; font-style: normal;
}
.final .positioning .mark { background: linear-gradient(transparent 60%, var(--mark) 60%); padding: 0 3px; }

/* === FOOTER === */
footer {
  border-top: 1px solid var(--border); padding: 32px 0 56px;
  font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--dim);
}
footer .container { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; }
footer a { color: var(--dim); }

/* === SCROLL REVEAL ===
   Default state is VISIBLE. The reveal animation only engages once JS has
   confirmed support and added `js-reveal` to <html>. If the script never runs,
   throws, or the browser lacks IntersectionObserver, nothing is ever hidden. */
.js-reveal .reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.js-reveal .reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js-reveal .reveal { opacity: 1; transform: none; }
  * { scroll-behavior: auto !important; transition: none !important; }
}