:root {
  --bg: #f4f6fa; --card: #fff; --text: #1d2433; --muted: #66708a; --line: #dfe4ee;
  --primary: #2f5fd6; --primary-dark: #244cb0; --danger: #c0392b; --ok: #1e8e5a; --wait: #b7791f; --wa: #25d366;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; }
a { color: var(--primary); }
.topbar { display: flex; justify-content: space-between; align-items: center; padding: .7rem 1.2rem; background: #fff; border-bottom: 1px solid var(--line); }
.topbar .brand { font-weight: 700; font-size: 1.2rem; text-decoration: none; color: var(--text); }
.topbar .brand span { color: var(--primary); }
.topbar nav { display: flex; gap: 1rem; align-items: center; }
.topbar nav a { text-decoration: none; color: var(--text); }
.container { max-width: 1000px; margin: 1.5rem auto; padding: 0 1rem; }
.footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 2rem 1rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 1.5rem; margin-bottom: 1.5rem; }
.card.narrow { max-width: 480px; margin: 2rem auto; }
.card.center { text-align: center; }
h1 { font-size: 1.5rem; margin: 0 0 .8rem; }
h2 { font-size: 1.15rem; margin: 1.5rem 0 .6rem; }
label { display: block; margin: .8rem 0 .2rem; font-weight: 600; font-size: .92rem; }
input[type=text], input[type=email], input[type=password], input[type=datetime-local], select, textarea {
  width: 100%; padding: .6rem .7rem; border: 1px solid var(--line); border-radius: 8px; font: inherit; margin-top: .25rem; background: #fff;
}
.btn { display: inline-block; padding: .5rem .9rem; border-radius: 8px; border: 1px solid var(--line); background: #fff; color: var(--text); text-decoration: none; cursor: pointer; font: inherit; margin: .2rem .1rem; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.danger { color: var(--danger); border-color: var(--danger); }
.btn.wa { background: var(--wa); border-color: var(--wa); color: #fff; }
.btn.small { padding: .3rem .6rem; font-size: .85rem; }
button.link { background: none; border: none; color: var(--text); cursor: pointer; font: inherit; padding: 0; }
form.inline { display: inline; }
.flash { padding: .7rem 1rem; border-radius: 8px; margin-bottom: 1rem; border: 1px solid transparent; }
.flash-success { background: #e6f6ee; border-color: #b8e2cb; color: #14633e; }
.flash-info { background: #e8f0fe; border-color: #c3d4fb; color: #1d3f8f; }
.flash-warning { background: #fff5e0; border-color: #f4dba4; color: #7a5410; }
.flash-danger { background: #fdecea; border-color: #f5c2bd; color: #8d2a20; }
.err { color: var(--danger); font-size: .88rem; margin: .2rem 0; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.big { font-size: 1.3rem; font-weight: 600; }
.row { display: flex; gap: 1rem; align-items: flex-start; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.table th, .table td { padding: .6rem .8rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.table th { background: #f8f9fc; font-size: .85rem; color: var(--muted); font-weight: 600; }
.badge { display: inline-block; padding: .15rem .55rem; border-radius: 999px; font-size: .8rem; font-weight: 600; }
.badge.ok { background: #e6f6ee; color: var(--ok); }
.badge.wait { background: #fff5e0; color: var(--wait); }
.badge.none { background: #eef0f5; color: var(--muted); }
.note { background: #fffbe8; border: 1px solid #f1e3a7; padding: .6rem .9rem; border-radius: 8px; }
.qr { text-align: center; margin: 1rem 0; }
.secret { display: inline-block; background: #f1f3f8; padding: .3rem .6rem; border-radius: 6px; letter-spacing: .08em; }
ul.plain { list-style: none; padding: 0; }
ul.plain li { padding: .4rem 0; border-bottom: 1px solid var(--line); }
.hero { text-align: center; padding: 3rem 1rem; }
.waiting { margin: 1.5rem 0; }
.spinner { width: 42px; height: 42px; border: 4px solid var(--line); border-top-color: var(--primary); border-radius: 50%; margin: 0 auto .8rem; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }