/* AI Coding Usage Meter — landing page
   Design language: photography-first, single blue accent, alternating full-bleed
   tiles, SF Pro (Inter fallback). One product shadow, no decorative gradients. */

:root {
  --primary: #0066cc;
  --primary-focus: #0071e3;
  --primary-on-dark: #2997ff;

  --ink: #1d1d1f;
  --ink-muted-80: #333;
  --ink-muted-48: #7a7a7a;

  --canvas: #fff;
  --parchment: #f5f5f7;
  --tile-dark: #272729;
  --tile-dark-2: #2a2a2c;
  --black: #000;

  --hairline: #e0e0e0;
  --body-muted: #cccccc;

  --shadow-product: 0 5px 30px 3px rgba(0, 0, 0, 0.22);

  --font-display: "SF Pro Display", "Inter", system-ui, -apple-system,
    BlinkMacSystemFont, sans-serif;
  --font-text: "SF Pro Text", "Inter", system-ui, -apple-system,
    BlinkMacSystemFont, sans-serif;

  --section: 96px;
  --maxw: 1040px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.012em;
  color: var(--ink);
  background: var(--canvas);
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

/* ---------- Global nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 48px;
  background: var(--black);
  color: #fff;
  display: flex;
  align-items: center;
}

.nav__inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 9px;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.012em;
}

.nav__brand:hover {
  text-decoration: none;
}

.nav__brand img {
  width: 22px;
  height: 22px;
  border-radius: 5px;
}

.nav__spacer {
  flex: 1;
}

.nav__link {
  color: #f5f5f7;
  font-size: 12px;
  letter-spacing: -0.01em;
  opacity: 0.85;
}

.nav__link:hover {
  opacity: 1;
  text-decoration: none;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1;
  letter-spacing: -0.012em;
  padding: 12px 24px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn:active {
  transform: scale(0.96);
}

.btn:focus-visible {
  outline: 2px solid var(--primary-focus);
  outline-offset: 3px;
}

.btn--primary {
  background: var(--primary);
  color: #fff;
}

.btn--primary:hover {
  background: #0058b3;
}

.btn--ghost {
  background: transparent;
  color: var(--primary);
  border-color: rgba(0, 102, 204, 0.45);
}

.btn--ghost-dark {
  background: transparent;
  color: var(--primary-on-dark);
  border-color: rgba(41, 151, 255, 0.45);
}

/* ---------- Section shell ---------- */
.tile {
  padding: var(--section) 22px;
}

.tile--light {
  background: var(--canvas);
}

.tile--parchment {
  background: var(--parchment);
}

.tile--dark {
  background: var(--tile-dark);
  color: #fff;
}

.tile__inner {
  max-width: var(--maxw);
  margin: 0 auto;
}

.eyebrow {
  font-family: var(--font-text);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--primary);
  margin: 0 0 14px;
}

.tile--dark .eyebrow {
  color: var(--primary-on-dark);
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0;
}

h1 {
  font-size: 56px;
  line-height: 1.06;
  letter-spacing: -0.022em;
}

h2 {
  font-size: 40px;
  line-height: 1.1;
  letter-spacing: -0.018em;
}

h3 {
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.014em;
}

.lead {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 24px;
  line-height: 1.35;
  letter-spacing: -0.006em;
  color: var(--ink-muted-80);
  max-width: 36ch;
}

.tile--dark .lead {
  color: var(--body-muted);
}

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding-top: 84px;
}

.hero .lead {
  margin: 22px auto 34px;
  max-width: 30ch;
}

.hero__cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero__shot {
  display: block;
  width: 100%;
  height: auto;
  margin: 64px auto 0;
  max-width: 1000px;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 18px 50px -12px rgba(0, 0, 0, 0.28);
}

.hero__note {
  margin-top: 22px;
  font-size: 14px;
  letter-spacing: -0.012em;
  color: var(--ink-muted-48);
}

/* ---------- Feature tile (text + gallery) ---------- */
.feature__head {
  max-width: 40ch;
}

.feature__head h2 {
  margin-bottom: 18px;
}

.cards {
  margin-top: 56px;
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(4, 1fr);
}

.cards--3 {
  grid-template-columns: repeat(3, 1fr);
  max-width: 760px;
}

.cards--2 {
  grid-template-columns: repeat(2, 1fr);
  max-width: 520px;
}

.card {
  margin: 0;
}

.card img {
  width: 100%;
  border-radius: 18px;
}

.card figcaption {
  margin-top: 14px;
  font-size: 14px;
  letter-spacing: -0.016em;
  color: var(--ink-muted-48);
  text-align: center;
}

.tile--dark .card figcaption {
  color: var(--body-muted);
}

/* ---------- Privacy / value points ---------- */
.points {
  margin-top: 56px;
  display: grid;
  gap: 40px 56px;
  grid-template-columns: repeat(3, 1fr);
}

.point h3 {
  margin-bottom: 10px;
}

.point p {
  margin: 0;
  font-size: 17px;
  line-height: 1.47;
  color: var(--body-muted);
}

.points + .points__foot {
  margin-top: 40px;
}

.points__foot {
  margin-top: 36px;
  font-size: 15px;
  color: var(--body-muted);
}

.points__foot a {
  color: var(--primary-on-dark);
}

/* ---------- Steps ---------- */
.steps {
  margin-top: 48px;
  display: grid;
  gap: 28px 56px;
  grid-template-columns: repeat(3, 1fr);
  counter-reset: step;
}

.step {
  border-top: 1px solid var(--hairline);
  padding-top: 18px;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 10px;
}

.step h3 {
  font-size: 19px;
  margin-bottom: 6px;
}

.step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink-muted-80);
}

.req {
  margin-top: 44px;
  font-size: 15px;
  color: var(--ink-muted-48);
}

.req code {
  font-family: "SF Mono", ui-monospace, "Cascadia Code", monospace;
  font-size: 13px;
  background: var(--parchment);
  padding: 2px 6px;
  border-radius: 5px;
  color: var(--ink-muted-80);
}

.tile--light .req code {
  background: #f0f0f2;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--parchment);
  color: var(--ink-muted-80);
  padding: 56px 22px 40px;
  font-size: 12px;
  line-height: 1.5;
}

.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--hairline);
}

.footer__links a {
  color: var(--ink-muted-80);
  font-size: 13px;
  letter-spacing: -0.012em;
}

.footer__fine {
  margin-top: 22px;
  color: var(--ink-muted-48);
  max-width: 80ch;
}

.footer__fine p {
  margin: 0 0 8px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1068px) {
  :root {
    --section: 80px;
  }
  h1 {
    font-size: 48px;
  }
}

@media (max-width: 833px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .points,
  .steps {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --section: 64px;
  }
  h1 {
    font-size: 36px;
  }
  h2 {
    font-size: 30px;
  }
  .lead {
    font-size: 20px;
  }
  .cards,
  .cards--3,
  .points,
  .steps {
    grid-template-columns: 1fr;
  }
  .nav__link--hide-sm {
    display: none;
  }
}