:root {
  color-scheme: dark;
  --bg: #11151b;
  --panel: #1b2228;
  --text: #eeeee8;
  --muted: #b4bebc;
  --gold: #d8b878;
  --line: #424a4c;
  --rose: #efacb2;
  --mint: #9bcbbf;
  font-family: "Zen Kaku Gothic New", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
}
* { box-sizing: border-box; letter-spacing: 0; }
body { margin: 0; line-height: 1.7; overflow-wrap: anywhere; }
a { color: var(--gold); text-underline-offset: 5px; }
button, input, select { font: inherit; font-size: 16px; }
button, input, select, summary { min-height: 44px; }
button, select, summary { cursor: pointer; }
button { border: 1px solid var(--line); border-radius: 5px; color: var(--text); background: var(--panel); padding: 8px 16px; }
button:hover { border-color: var(--gold); }
:focus-visible { outline: 2px solid var(--mint); outline-offset: 4px; }
header, main, footer { max-width: 1040px; margin: auto; padding: 24px 28px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--line); }
.brand { font-family: "Shippori Mincho", "Yu Mincho", Georgia, serif; font-size: 26px; color: var(--text); text-decoration: none; }
.languages { display: flex; flex-shrink: 0; }
.languages button { border-radius: 0; min-width: 64px; }
.languages button[aria-pressed="true"] { background: var(--gold); color: var(--bg); }
nav { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-bottom: 24px; }
nav a { font-size: 14px; color: var(--muted); padding: 8px 0; }
nav a[aria-current="page"] { color: var(--gold); }
h1, h2 { font-family: "Shippori Mincho", "Yu Mincho", Georgia, serif; font-weight: 500; line-height: 1.45; }
h1 { font-size: 30px; margin: 0 0 24px; }
h2 { font-size: 25px; margin: 0 0 16px; }
h3 { font-size: 16px; font-weight: 500; color: var(--gold); }
p { margin: 0 0 16px; }
.workspace { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 36px; align-items: start; }
.workspace > * { min-width: 0; }
form { margin: 0; }
.fields { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 16px; }
label { display: block; font-size: 14px; }
input:not([type="checkbox"]), select { display: block; width: 100%; min-width: 0; height: 48px; padding: 8px 10px; margin-top: 6px; background: var(--panel); color: var(--text); border: 1px solid var(--line); border-radius: 4px; }
input:disabled { opacity: .45; }
.full { grid-column: 1 / -1; }
.check { display: flex; align-items: center; gap: 10px; min-height: 40px; margin-top: 8px; }
.check input { width: 20px; height: 20px; accent-color: var(--gold); }
.small, #basis, #location { color: var(--muted); font-size: 13px; }
#location { margin: 12px 0; min-height: 45px; }
#calculate { background: var(--gold); color: var(--bg); font-weight: 600; width: 100%; min-height: 48px; margin: 12px 0; }
#error { color: var(--rose); margin-top: 12px; }
#error:empty { display: none; }
.result-area { border-top: 1px solid var(--gold); padding-top: 24px; }
.moon-row { display: flex; align-items: center; gap: 22px; margin-bottom: 16px; }
canvas { display: block; width: 112px; height: 112px; flex: 0 0 112px; }
.phase-label { color: var(--mint); margin: 0; }
#result-title { color: var(--gold); margin: 0 0 8px; font-size: 28px; }
#warning { color: var(--rose); }
#reading p { margin-bottom: 16px; }
.facts { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 16px; margin: 16px 0; }
.facts dt { font-size: 13px; color: var(--muted); }
.facts dd { margin: 0; color: var(--mint); font-size: 22px; }
.conditions { border-top: 1px solid var(--line); margin-top: 30px; padding-top: 20px; }
.conditions p { font-size: 14px; color: var(--muted); max-width: 78ch; }
summary { color: var(--gold); }
footer { border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
[hidden] { display: none !important; }
@media (max-width: 680px) {
  header, main, footer { padding: 18px; }
  .brand { font-size: 23px; }
  .languages button { padding: 7px 10px; min-width: 60px; }
  h1 { font-size: 26px; margin-bottom: 20px; }
  nav { gap: 4px 16px; margin-bottom: 16px; }
  .workspace { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .moon-row { gap: 16px; }
  #result-title { font-size: 26px; }
}