/* about.metermatters.app. Same palette and type as the app, so the two feel
   like one thing. Light and dark follow the visitor's system setting. */

:root {
  color-scheme: light;
  --page:           #f9f9f7;
  --surface-1:      #fcfcfb;
  --surface-2:      #f2f1ed;
  --text-primary:   #0b0b0b;
  --text-secondary: #52514e;
  --text-muted:     #6f6d67;
  --border:         rgba(11, 11, 11, 0.10);
  --shadow:         0 1px 2px rgba(11, 11, 11, 0.04), 0 4px 16px rgba(11, 11, 11, 0.04);
  --shadow-lg:      0 2px 6px rgba(11, 11, 11, 0.06), 0 24px 60px rgba(11, 11, 11, 0.10);
  --blue:           #2a78d6;
  --orange:         #eb6834;
  --aqua:           #1baf7a;
  --good-text:      #006300;
  --radius:         14px;
  --radius-sm:      9px;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page:           #0d0d0d;
    --surface-1:      #1a1a19;
    --surface-2:      #232322;
    --text-primary:   #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted:     #898781;
    --border:         rgba(255, 255, 255, 0.10);
    --shadow:         0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg:      0 2px 6px rgba(0, 0, 0, 0.5), 0 24px 60px rgba(0, 0, 0, 0.5);
    --blue:           #3987e5;
    --orange:         #d95926;
    --aqua:           #199e70;
    --good-text:      #0ca30c;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  padding: 0 16px;
  background: var(--page);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.55;
}

a { color: var(--blue); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

.wrap { max-width: 1040px; margin: 0 auto; }
.narrow { max-width: 720px; margin: 0 auto; }

/* ------------------------------------------------------------- header */

header.top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 22px 0;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; }
.brand img { width: 26px; height: 26px; }
.brand strong { font-size: 20px; font-weight: 650; letter-spacing: -0.01em; }
nav { display: flex; align-items: center; gap: 6px 18px; flex-wrap: wrap; justify-content: flex-end; }
nav a { color: var(--text-secondary); text-decoration: none; font-size: 15px; }
nav a:hover { color: var(--text-primary); }

.btn {
  display: inline-block; text-decoration: none; font: inherit; font-size: 16px;
  color: var(--text-primary); background: var(--surface-1);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 10px 18px; cursor: pointer; white-space: nowrap;
  transition: background 120ms ease, filter 120ms ease;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--blue); border-color: var(--blue); color: #fff; font-weight: 550; }
.btn.primary:hover { filter: brightness(1.08); background: var(--blue); }
.btn.big { font-size: 18px; padding: 13px 24px; }
nav .btn { padding: 7px 14px; font-size: 15px; }

/* --------------------------------------------------------------- hero */

.hero { text-align: center; padding: 48px 0 28px; }
.hero h1 {
  font-size: clamp(34px, 6vw, 56px); line-height: 1.08; letter-spacing: -0.025em;
  font-weight: 700; margin: 0 auto 18px; max-width: 760px;
}
.hero .lede { font-size: clamp(18px, 2.3vw, 21px); color: var(--text-secondary); max-width: 640px; margin: 0 auto 26px; }
.actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero .fine { color: var(--text-muted); font-size: 14px; margin: 14px 0 0; }

.video {
  margin: 36px auto 0; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); box-shadow: var(--shadow-lg); background: #000;
}
.video video { display: block; width: 100%; height: auto; }
.caption { text-align: center; color: var(--text-muted); font-size: 14px; margin: 12px 0 0; }

/* ----------------------------------------------------------- sections */

section { padding: 56px 0 8px; }
section h2 {
  font-size: clamp(26px, 4vw, 34px); letter-spacing: -0.02em; line-height: 1.15;
  margin: 0 0 10px; font-weight: 700;
}
section > .wrap > p.intro, section > .narrow > p.intro { color: var(--text-secondary); font-size: 18px; margin: 0 0 28px; max-width: 640px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 22px 22px 20px;
}
.card h3 { margin: 0 0 6px; font-size: 18px; font-weight: 650; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--text-secondary); font-size: 15.5px; }
.card .dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin: 0 8px 1px 0; background: var(--blue); }
.card .dot.orange { background: var(--orange); }
.card .dot.aqua { background: var(--aqua); }

/* a screenshot with its words beside it */
.shot { display: grid; grid-template-columns: 5fr 7fr; gap: 28px 40px; align-items: center; padding: 26px 0; }
.shot:nth-child(even) .words { order: 2; }
.shot .words h3 { font-size: 23px; letter-spacing: -0.015em; margin: 0 0 8px; font-weight: 650; line-height: 1.2; }
.shot .words p { margin: 0; color: var(--text-secondary); }
.shot img, .shot picture img {
  width: 100%; height: auto; display: block; border-radius: var(--radius);
  border: 1px solid var(--border); box-shadow: var(--shadow-lg); background: var(--surface-1);
}

.promise.address { border-color: var(--blue); margin-bottom: 28px; }
.promise.address h3 { margin: 0 0 8px; font-size: 23px; letter-spacing: -0.015em; font-weight: 650; }
.promise.address p { margin: 0 0 10px; color: var(--text-secondary); }
.promise.address code { font-size: 0.95em; background: var(--surface-2); padding: 2px 7px; border-radius: 6px; color: var(--text-primary); }
.promise.address .fine { color: var(--text-muted); font-size: 14px; margin: 4px 0 0; }

.ways { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 32px; margin: 0; padding: 0; list-style: none; }
.ways li { padding: 12px 0; border-top: 1px solid var(--border); }
.ways strong { display: block; font-weight: 650; margin-bottom: 2px; }
.ways span { color: var(--text-secondary); font-size: 15.5px; }

.promise { background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 30px 32px; }
.promise ul { margin: 12px 0 0; padding-left: 20px; color: var(--text-secondary); }
.promise li { margin: 6px 0; }

.closing { text-align: center; padding: 72px 0 40px; }
.closing h2 { margin-bottom: 18px; }

footer.foot {
  border-top: 1px solid var(--border); margin-top: 24px; padding: 26px 0 40px;
  color: var(--text-muted); font-size: 14px;
  display: flex; justify-content: space-between; gap: 10px 20px; flex-wrap: wrap;
}
footer.foot a { color: var(--text-secondary); text-decoration: none; margin-right: 18px; }
footer.foot a:hover { color: var(--text-primary); text-decoration: underline; }

/* ------------------------------------------------------- privacy page */

.doc { padding: 24px 0 40px; }
.doc h1 { font-size: clamp(30px, 5vw, 42px); letter-spacing: -0.02em; margin: 0 0 6px; }
.doc .updated { color: var(--text-muted); font-size: 14px; margin: 0 0 28px; }
.doc h2 { font-size: 22px; margin: 36px 0 8px; letter-spacing: -0.015em; }
.doc p, .doc li { color: var(--text-secondary); }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc strong { color: var(--text-primary); font-weight: 600; }

/* ---------------------------------------------------------- phones */

@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .shot { grid-template-columns: 1fr; gap: 16px; }
  .shot:nth-child(even) .words { order: 0; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .cards, .ways { grid-template-columns: 1fr; }
  header.top { padding: 16px 0; }
  nav a:not(.btn) { display: none; }
  .hero { padding-top: 28px; }
  .promise { padding: 22px 20px; }
}