/* One small stylesheet. System fonts, no framework. */
:root {
  --bg: #fff; --fg: #1d1f21; --muted: #6b7075; --line: #dfe2e5; --accent: #1f6f43; --accent-fg: #fff;
  --error-bg: #fdecea; --error-fg: #8a1c12; --head: #f6f7f8;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #17191b; --fg: #e6e8ea; --muted: #9aa0a6; --line: #33373b; --accent: #4caf7a; --accent-fg: #0d1a12;
          --error-bg: #3b1a17; --error-fg: #f4b4ab; --head: #1f2225; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.45 system-ui, sans-serif; }
header { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1.5rem; padding: .6rem 1rem; border-bottom: 1px solid var(--line); }
header .brand { font-weight: 600; color: var(--fg); text-decoration: none; }
header nav { display: flex; flex-wrap: wrap; gap: .25rem 1rem; flex: 1; }
header nav a { color: var(--muted); text-decoration: none; padding: .2rem 0; }
header nav a[aria-current] { color: var(--fg); border-bottom: 2px solid var(--accent); }
header .who { color: var(--muted); font-size: .9em; margin: 0; }
main { padding: 1rem; max-width: 72rem; }
h1 { font-size: 1.4rem; margin: .5rem 0 1rem; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.error { background: var(--error-bg); color: var(--error-fg); padding: .5rem .75rem; border-radius: 4px; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: .35rem .6rem; border-bottom: 1px solid var(--line); }
thead th, tfoot th { background: var(--head); }
.num { text-align: right; font-variant-numeric: tabular-nums; }
button, .button { display: inline-block; font: inherit; padding: .45rem .9rem; border: 0; border-radius: 4px;
  background: var(--accent); color: var(--accent-fg); text-decoration: none; cursor: pointer; }
button.link { background: none; color: var(--accent); padding: 0; text-decoration: underline; }
input, select, textarea { font: inherit; padding: .4rem .5rem; border: 1px solid var(--line); border-radius: 4px; background: var(--bg); color: var(--fg); }
.login { max-width: 22rem; margin: 4rem auto; text-align: center; }
.login .dev { margin-top: 2rem; padding-top: 1rem; border-top: 1px dashed var(--line); display: grid; gap: .5rem; }
@media (max-width: 40rem) { table { font-size: .9em; } th, td { padding: .3rem .35rem; } }

/* --- pages --- */
h2 { font-size: 1.1rem; margin: 1.5rem 0 .5rem; }
.flash { background: var(--head); border-left: 3px solid var(--accent); padding: .5rem .75rem; border-radius: 4px; }
.error ul { margin: 0; padding-left: 1.2rem; }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1rem; margin: 0 0 1rem; }
.toolbar label { display: flex; align-items: center; gap: .4rem; }
.toolbar input[type=search] { min-width: 12rem; }
.stack { display: grid; gap: .8rem; }
.stack label { display: grid; gap: .2rem; }
.narrow { max-width: 28rem; }
.row { display: flex; flex-wrap: wrap; gap: .8rem; }
.row > label { flex: 1 1 10rem; }
.row > label.wide { flex: 3 1 20rem; }
fieldset { border: 1px solid var(--line); border-radius: 4px; padding: .5rem .8rem .8rem; margin: 0; }
legend { padding: 0 .3rem; }
output { padding: .4rem 0; font-weight: 600; font-variant-numeric: tabular-nums; }
td.actions { white-space: nowrap; text-align: right; }
tr.group td { background: var(--head); }
.pre { white-space: pre-line; }
.scroll { overflow-x: auto; }
table.auto { width: auto; }
input.cases { width: 6rem; text-align: right; }
button.secondary, .button.secondary { background: var(--head); color: var(--fg); border: 1px solid var(--line); }
button.danger { background: var(--error-fg); color: var(--bg); }
.danger-zone { margin-top: 2.5rem; padding-top: 1rem; border-top: 1px solid var(--line); display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
dl.facts { display: grid; grid-template-columns: max-content 1fr; gap: .25rem 1rem; margin: 0 0 1rem; }
dl.facts dt { color: var(--muted); }
dl.facts dd { margin: 0; }
.share { border: 1px solid var(--line); border-radius: 6px; padding: .2rem 1rem .8rem; margin: 0 0 1rem; }
.copyrow { display: flex; gap: .5rem; }
.copyrow input { flex: 1; min-width: 0; font-family: ui-monospace, monospace; font-size: .9em; }
ul.files { padding-left: 1.2rem; }
[hidden] { display: none !important; }
small:empty { display: none; }

/* "Sign in with Google" button, per Google's branding guidelines (light and dark variants). */
.gsi { display: inline-flex; align-items: center; gap: 12px; height: 40px; padding: 0 12px; border: 1px solid #747775;
  border-radius: 4px; background: #fff; color: #1f1f1f; text-decoration: none;
  font: 500 14px/20px Roboto, "Google Sans", Arial, sans-serif; letter-spacing: .25px; }
.gsi svg { width: 20px; height: 20px; flex: none; }
.gsi:hover { background: #f8f9fa; box-shadow: 0 1px 2px rgba(60,64,67,.3), 0 1px 3px 1px rgba(60,64,67,.15); }
.gsi:focus-visible { outline: 2px solid #4285f4; outline-offset: 2px; }
@media (prefers-color-scheme: dark) {
  .gsi { background: #131314; color: #e3e3e3; border-color: #8e918f; }
  .gsi:hover { background: #1f1f20; }
}
details.correct { margin: 1rem 0; }
details.correct summary { cursor: pointer; color: var(--accent); }
details.correct form { margin-top: .8rem; }