/* One small stylesheet, no outside fonts or scripts: the page must load
   inside a phone's sign-in sheet before the device has internet access. */
:root {
  --bg: #f6f5f2;
  --card: #ffffff;
  --text: #1d1d1b;
  --muted: #5c5c57;
  --line: #d9d7d0;
  --accent: #1f4e79;
  --accent-text: #ffffff;
  --warn-bg: #fff4d6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --card: #1f2226;
    --text: #f1f0ec;
    --muted: #b3b1aa;
    --line: #3a3e44;
    --accent: #7fb2e0;
    --accent-text: #10151a;
    --warn-bg: #3d3520;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
main { max-width: 640px; margin: 0 auto; padding: 24px 16px 40px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px 20px;
}
.logo { display: block; width: 220px; max-width: 70%; height: auto; margin: 0 auto 16px; }
.logo-dark { display: none; }
@media (prefers-color-scheme: dark) {
  .logo-light { display: none; }
  .logo-dark { display: block; }
}
h1 { font-size: 1.5rem; line-height: 1.25; margin: 0 0 8px; }
.center { text-align: center; }
h2 { font-size: 1.15rem; margin: 28px 0 8px; }
p, ul { margin: 0 0 14px; }
ul { padding-left: 22px; }
a { color: var(--accent); }
.muted { color: var(--muted); font-size: 0.92rem; }
label.field { display: block; font-weight: 600; margin: 18px 0 6px; }
input[type="tel"] {
  width: 100%;
  font: inherit;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}
.check { display: flex; gap: 10px; align-items: flex-start; margin: 16px 0 6px; }
.check input { width: 22px; height: 22px; margin: 2px 0 0; flex: 0 0 auto; }
.disclosure { margin-left: 32px; }
button {
  display: block;
  width: 100%;
  margin: 22px 0 12px;
  padding: 14px;
  font: inherit;
  font-weight: 600;
  color: var(--accent-text);
  background: var(--accent);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}
.notice { background: var(--warn-bg); border-radius: 8px; padding: 12px 14px; }
footer { text-align: center; margin-top: 20px; }