:root {
  --bg: #f6f6f9; --panel: #fff; --ink: #1d1d27; --muted: #6b6b7b; --line: #e4e4ec;
  --accent: #5b4bdb; --accent-ink: #fff; --ok: #0f8a5f; --warn: #b26a00; --bad: #c0392b;
  --radius: 10px;
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
       background: var(--bg); color: var(--ink); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.6rem; margin: 0 0 1rem; }
h2 { font-size: 1.15rem; margin: 1.5rem 0 .75rem; }
h3 { font-size: 1rem; margin: 0 0 .5rem; }
main { max-width: 1180px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }

.topbar { display: flex; align-items: center; gap: 1.5rem; padding: .75rem 1.25rem;
          background: var(--panel); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.topbar .brand { font-weight: 700; font-size: 1.1rem; color: var(--ink); }
.topbar nav { display: flex; gap: 1rem; flex: 1; flex-wrap: wrap; align-items: center; }
.topbar nav a { color: var(--muted); }
.topbar nav a:hover { color: var(--ink); }
.topbar .sep { width: 1px; height: 1.2em; background: var(--line); }
.topbar .user { display: flex; gap: .75rem; align-items: center; }

.flash { padding: .7rem 1rem; border-radius: var(--radius); margin-bottom: 1rem;
         background: #eef; border: 1px solid #d6d6f5; }
.flash.success { background: #e8f7f0; border-color: #bfe6d3; }
.flash.error { background: #fdecea; border-color: #f5c6c0; }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
         padding: 1.25rem; margin-bottom: 1.25rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.cols { display: grid; gap: 1.25rem; grid-template-columns: 2fr 1fr; }
@media (max-width: 860px) { .cols { grid-template-columns: 1fr; } }
.narrow { max-width: 420px; margin: 2rem auto; }
.center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.right { text-align: right; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.row { display: flex; gap: .75rem; flex-wrap: wrap; align-items: flex-end; }
.stack > * + * { margin-top: .75rem; }

label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: .6rem; }
input, select, textarea { display: block; width: 100%; margin-top: .25rem; padding: .55rem .65rem;
  font: inherit; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.row label { flex: 1; min-width: 90px; }
input[type=checkbox] { display: inline; width: auto; margin: 0 .35rem 0 0; }
input[type=color] { padding: 2px; height: 38px; }
label.check { display: inline-flex; align-items: center; margin-right: .75rem; color: var(--ink); }

.btn { display: inline-block; padding: .5rem .95rem; border-radius: 8px; border: 1px solid var(--accent);
       background: var(--accent); color: var(--accent-ink); font: inherit; font-weight: 600;
       cursor: pointer; text-decoration: none; }
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn.small { padding: .3rem .65rem; font-size: .85rem; }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.danger { background: transparent; color: var(--bad); border-color: var(--bad); }
.btn.ok { background: var(--ok); border-color: var(--ok); }
.btn[disabled] { opacity: .5; cursor: default; }
button.link { background: none; border: 0; color: var(--accent); font: inherit; cursor: pointer; padding: 0; }
form.inline { display: inline; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .6rem .5rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
td.actions { white-space: nowrap; text-align: right; }
td.actions form + form { margin-left: .35rem; }

.badge { display: inline-block; padding: .1rem .5rem; border-radius: 99px; font-size: .75rem;
         font-weight: 600; text-transform: capitalize; background: #ececf3; color: var(--muted); }
.badge.active, .badge.paid, .badge.booked, .badge.attended, .badge.succeeded, .badge.scheduled { background: #e3f5ec; color: var(--ok); }
.badge.waitlisted, .badge.open, .badge.past_due { background: #fff2dc; color: var(--warn); }
.badge.failed, .badge.no_show, .badge.late_cancelled, .badge.cancelled { background: #fdecea; color: var(--bad); }

.stats { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); margin-bottom: 1.25rem; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; }
.stat .n { font-size: 1.6rem; font-weight: 700; }
.stat .l { color: var(--muted); font-size: .85rem; }

.week { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: .6rem; }
@media (max-width: 900px) { .week { grid-template-columns: 1fr; } }
.day h3 { font-size: .85rem; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.day.today h3 { color: var(--accent); }
.class { background: var(--panel); border: 1px solid var(--line); border-left: 4px solid var(--accent);
         border-radius: 8px; padding: .6rem .65rem; margin-bottom: .6rem; font-size: .88rem; }
.class .time { font-weight: 700; }
.class .name { font-weight: 600; }
.class .meta { color: var(--muted); font-size: .8rem; }
.class form { margin-top: .4rem; }
.class.past, .class.cancelled { opacity: .55; }

.plan { display: flex; flex-direction: column; }
.plan .price { font-size: 1.5rem; font-weight: 700; margin: .25rem 0; }
.plan form { margin-top: auto; }
.empty { color: var(--muted); padding: 1rem 0; }
.card-form { max-width: 420px; }
.invoice-doc { max-width: 640px; margin: 0 auto; }
@media print { .topbar, .no-print { display: none; } body { background: #fff; } .panel { border: 0; } }
.swatch { display: inline-block; width: .7em; height: .7em; border-radius: 3px; vertical-align: middle; margin-right: .25rem; }
.mt { margin-top: 1rem; }
select.inline { display: inline-block; width: auto; margin: 0 .25rem 0 0; padding: .3rem .4rem; }

ul.plain { list-style: none; padding: 0; display: grid; gap: .5rem; }
a.class { display: block; color: inherit; text-decoration: none; }
a.class:hover { border-color: var(--accent); text-decoration: none; }
.class .full { color: var(--bad); }
.day h3.spread { align-items: center; }
.add-day { font-size: 1.1rem; line-height: 1; padding: 0 .35rem; border-radius: 6px; text-decoration: none; }
.add-day:hover { background: var(--line); text-decoration: none; }
.toggle { margin: 0 .35rem; }
details.panel > summary { cursor: pointer; list-style: none; }
details.panel > summary::-webkit-details-marker { display: none; }
details.panel > summary h2 { display: inline-block; margin: 0; }
details.panel > summary h2::before { content: "▸ "; color: var(--muted); }
details.panel[open] > summary h2::before { content: "▾ "; }
details.panel[open] > summary { margin-bottom: .75rem; }