* { box-sizing: border-box; }
body {
  font-family: system-ui, sans-serif;
  margin: 0;
  min-height: 100vh;
  background: #f6f6f6;
  color: #222;
  display: flex;
  align-items: center;
  justify-content: center;
}
main { width: min(92vw, 24rem); padding: 2rem 0; text-align: center; }
main.wide { width: min(94vw, 60rem); text-align: left; }
main.wide header { text-align: center; }
main.wide h2 { text-align: center; }
h1 { margin: 0; letter-spacing: .02em; }
h2 { margin-top: 0; }
.tagline { margin: .2rem 0 1.5rem; opacity: .7; font-size: .9rem; }
.disclaimer { margin: 1rem 0 0; opacity: .6; font-size: .8rem; text-align: center; }
.card {
  background: #fff;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,.08);
  text-align: left;
}
label { display: block; margin: 1rem 0; font-size: .9rem; }
input {
  display: block;
  width: 100%;
  margin-top: .3rem;
  padding: .6rem;
  font-size: 1rem;
  border: 1px solid #bbb;
  border-radius: 8px;
}
button {
  padding: .6rem 1.2rem;
  margin-top: .5rem;
  font-size: 1rem;
  border: 0;
  border-radius: 8px;
  background: #1670a0;
  color: #fff;
  cursor: pointer;
}
button.link { background: none; color: #1670a0; padding: .3rem 0; }
.error {
  background: #fde8e8;
  color: #7a1f1f;
  padding: .6rem .9rem;
  border-radius: 8px;
  font-size: .9rem;
}
.hint { opacity: .7; font-size: .85rem; }
svg { width: 100%; height: auto; display: block; }
table { border-collapse: collapse; width: 100%; }
td { padding: .45rem .6rem; }
/* Traffic-light bands (Battelino 2019 Table 2): translucent to survive light and dark mode */
tr.good td { background: rgba(40, 167, 69, 0.14); }
tr.warn td { background: rgba(255, 193, 7, 0.14); }
tr.bad  td { background: rgba(220, 53, 69, 0.12); }
.notice { background: rgba(22, 112, 160, 0.12); padding: .6rem .9rem; border-radius: 8px; font-size: .9rem; }
.today-head, .today-deltas { text-align: center; margin: .3rem 0; }
.today-current { font-size: 2rem; font-weight: 700; }
.today-unit { font-size: 1rem; font-weight: 400; opacity: .8; }
.today-glyph { font-size: 1.8rem; vertical-align: middle; padding-left: .4rem; }
.today-age { font-size: .85rem; opacity: .7; display: block; margin-top: .1rem; }
.today-deltas { font-size: .95rem; opacity: .9; }
.last24 { text-align: center; font-size: .95rem; margin: .3rem 0; }
.last24 span.good, .last24 span.warn, .last24 span.bad { padding: .05rem .35rem; border-radius: 3px; }
.last24 span.good { background: rgba(40, 167, 69, 0.14); }
.last24 span.warn { background: rgba(255, 193, 7, 0.14); }
.last24 span.bad  { background: rgba(220, 53, 69, 0.12); }
.daynav { text-align: center; margin: .4rem 0; font-size: .95rem; opacity: .8; }
.graph { position: relative; }
.graph > p { text-align: center; padding: 3rem 0; opacity: .7; }
.navbtn {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 2.4rem; height: 2.4rem; line-height: 2.4rem; text-align: center;
  font-size: 2rem; text-decoration: none; border-radius: 50%;
  background: rgba(127, 127, 127, .3); color: inherit;
}
.navbtn.left  { left: .4rem; }
.navbtn.right { right: .4rem; }
.navbtn.off   { opacity: .25; pointer-events: none; }
.winnav { text-align: center; margin: .4rem 0; font-size: .95rem; }
.winnav .sep { opacity: .4; padding: 0 .8rem; }
.caption { text-align: right; }