/*
 * One stylesheet for the whole site, which is three pages long.
 *
 * No framework and no build step: these pages have to stay reachable and
 * readable for as long as the app is on Play, and the least maintenance is the
 * kind that has no dependencies to go stale. Everything here is system fonts
 * and CSS custom properties.
 */

:root {
  color-scheme: light dark;
  --fg: #16181d;
  --bg: #ffffff;
  --muted: #5b6069;
  --line: #d9dde3;
  --accent: #1a6ee0;
  --danger: #b3261e;
  --ok: #0f6d3c;
  --card: #f7f8fa;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6e8ec;
    --bg: #14161a;
    --muted: #a2a8b3;
    --line: #2c3037;
    --accent: #7fb0ff;
    --danger: #f2b8b5;
    --ok: #7ad1a1;
    --card: #1b1e24;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 2.5rem 1.15rem 5rem;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  /* Never justified: ragged-right is easier to read, and justification opens
     rivers of whitespace at the narrow widths this is mostly read at. */
  text-align: left;
}

main { max-width: 36rem; margin: 0 auto; }

h1 { font-size: 1.7rem; line-height: 1.25; margin: 0 0 .5rem; letter-spacing: -.01em; }
h2 { font-size: 1.15rem; margin: 2.25rem 0 .5rem; letter-spacing: -.005em; }
h3 { font-size: 1rem; margin: 1.5rem 0 .35rem; }

.lede { color: var(--muted); margin-top: 0; font-size: 1.05rem; }
.muted { color: var(--muted); font-size: .93rem; }

a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .9em;
  background: var(--card);
  padding: .1em .35em;
  border-radius: 4px;
}

hr { border: 0; border-top: 1px solid var(--line); margin: 2.25rem 0; }

/* The reassurance box. Used for the one thing every page has to say before it
   says anything else: the boards on the phone are not at risk. */
.safe {
  border: 1px solid var(--line);
  border-left: 4px solid var(--ok);
  border-radius: 10px;
  padding: 1rem 1.15rem;
  margin: 1.5rem 0;
  background: var(--card);
}
.safe strong { display: block; margin-bottom: .35rem; }

label { display: block; font-weight: 600; margin: 1.15rem 0 .35rem; }

input {
  width: 100%;
  padding: .72rem .8rem;
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
}

button {
  font: inherit;
  font-weight: 600;
  padding: .75rem 1.15rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  margin-top: 1rem;
  /* 44px minimum target, because this page is used on phones by people who are
     often already anxious about pressing the wrong thing. */
  min-height: 44px;
}
button[disabled] { opacity: .55; cursor: not-allowed; }

.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .primary { color: #0b1220; } }

.danger { border-color: var(--danger); color: var(--danger); }

.status {
  margin-top: 1.15rem;
  padding: .85rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--card);
}
.status[data-kind="error"] { border-color: var(--danger); color: var(--danger); }
.status[data-kind="ok"] { border-color: var(--ok); color: var(--ok); }

footer {
  max-width: 36rem;
  margin: 3rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .93rem;
}