:root { --bg: #f6f7f9; --card: #fff; --text: #1b1f24; --muted: #57606a; --accent: #0b5cad; --error: #b42318; --border: #d0d7de; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d1117; --card: #161b22; --text: #e6edf3; --muted: #9da7b3; --accent: #58a6ff; --error: #ff7b72; --border: #30363d; }
}
* { box-sizing: border-box; }
body { margin: 0; padding: 0 1rem; background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, sans-serif; }
main { max-width: 34rem; margin: 2rem auto; padding: 1.5rem 1rem; background: var(--card); border: 1px solid var(--border); border-radius: 8px; }
.brand { font-size: 1.1rem; color: var(--muted); margin: 0 0 1rem; }
h2 { margin-top: 0; }
label { display: block; margin: 1rem 0 .25rem; font-weight: 600; }
input { width: 100%; padding: .6rem; font-size: 1rem; border: 1px solid var(--border); border-radius: 6px; background: var(--card); color: var(--text); }
button, .button { display: inline-block; margin-top: 1rem; padding: .6rem 1.2rem; font-size: 1rem; border: 0; border-radius: 6px; background: var(--accent); color: #fff; text-decoration: none; cursor: pointer; }
.error { color: var(--error); font-weight: 600; }
.qr { text-align: center; margin: 1rem 0; }
.qr svg { max-width: 100%; height: auto; }
code { font-size: 1.05rem; word-break: break-all; }
.codes { columns: 2; font-family: ui-monospace, monospace; font-size: 1.05rem; }
details { margin-top: 1.5rem; }
a { color: var(--accent); }
.who { color: var(--muted); }
.muted { color: var(--muted); font-size: .9rem; }
.big { font-size: 1.8rem; font-weight: 700; margin: .25rem 0; }
section { margin: 1.5rem 0; }
h2 { font-size: 1.15rem; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: .35rem .4rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.scroll { overflow-x: auto; }
main.wide { max-width: 64rem; }
.done { color: var(--accent); font-weight: 600; }
nav { margin: .5rem 0 1rem; }
select, input[type=checkbox] { font-size: 1rem; }
select { width: 100%; padding: .55rem; border: 1px solid var(--border); border-radius: 6px; background: var(--card); color: var(--text); }
input[type=checkbox], input[type=radio] { width: auto; margin-right: .4rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr)); gap: 0 1rem; }
.inline { display: flex; gap: .5rem; align-items: end; flex-wrap: wrap; }
.inline label { margin-top: .5rem; }
.inline > * { flex: 1 1 10rem; }
.inline button { flex: 0 0 auto; }
td form { display: inline; }
td button, .small { margin-top: 0; padding: .25rem .7rem; font-size: .85rem; }
.warn { color: var(--error); }
.notice { margin: 1rem 0; padding: .75rem 1rem; border: 2px solid var(--accent); border-radius: 8px; }
.tag { font-size: .8rem; padding: .05rem .4rem; border: 1px solid var(--border); border-radius: 4px; }
.tag.new { color: var(--accent); border-color: var(--accent); }
audio { width: 100%; max-width: 20rem; }
.actions { display: flex; gap: .75rem; align-items: center; flex-wrap: wrap; margin: .25rem 0 0; }
.actions form { display: inline; }
/* Phone page (static/phone.js). */
.pad { display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; max-width: 16rem; margin-top: .75rem; }
.pad button { margin-top: 0; padding: .7rem 0; font-size: 1.2rem; background: var(--border); color: var(--text); }
button:disabled { opacity: .45; cursor: default; }
#hangup { background: var(--error); }
#mute[aria-pressed=true] { background: var(--muted); }
#incoming { margin: 1rem 0; padding: .75rem 1rem; border: 2px solid var(--accent); border-radius: 8px; }
#remote { display: none; }
[hidden] { display: none !important; }
textarea { width: 100%; box-sizing: border-box; min-height: 6rem; padding: .55rem; font: inherit; font-size: 1rem; border: 1px solid var(--border); border-radius: 6px; background: var(--card); color: var(--text); }
.msg { white-space: pre-wrap; word-break: break-word; }
/* A printed page (a call shop receipt) shows the content only. */
@media print {
  nav, form, .no-print { display: none; }
  body, main { background: #fff; color: #000; }
}