:root {
  --bg: #f4f6f9; --surface: #ffffff; --text: #0f172a; --muted: #64748b; --border: #e2e8f0;
  --accent: #0f172a; --accent-text: #ffffff; --accent-2: #0ea5e9; --accent-2-soft: #e0f2fe;
  --ok: #15803d; --ok-soft: #dcfce7; --warn: #b45309; --warn-soft: #fef3c7; --err: #b91c1c; --err-soft: #fee2e2; --info-soft: #e0e7ff; --info: #3730a3;
  --radius: 14px; --shadow: 0 1px 2px rgba(15,23,42,.04), 0 8px 24px -12px rgba(15,23,42,.12);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1220; --surface: #111a2e; --text: #e5eaf3; --muted: #93a0b5; --border: #22304a;
    --accent: #38bdf8; --accent-text: #061224; --accent-2: #38bdf8; --accent-2-soft: #0c2a3d;
    --ok: #4ade80; --ok-soft: #10301f; --warn: #fbbf24; --warn-soft: #3a2b0a; --err: #f87171; --err-soft: #3b1414; --info-soft: #1e2250; --info: #a5b4fc;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px -12px rgba(0,0,0,.6);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Helvetica, Arial, sans-serif; min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .6em; letter-spacing: -.01em; }
h1 { font-size: 1.6rem; } h2 { font-size: 1.15rem; } h3 { font-size: 1rem; }
p { margin: 0 0 .9em; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; background: var(--bg); padding: .15em .4em; border-radius: 6px; }
main { flex: 1; width: 100%; margin: 0 auto; padding: 24px 16px; }
main.narrow { max-width: 560px; }
main.wide { max-width: 1100px; }
.site-foot { text-align: center; padding: 20px 16px; color: var(--muted); font-size: .85rem; }
.site-foot a { color: var(--muted); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); margin-bottom: 20px; }
.card.center { text-align: center; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.card-head h2 { margin: 0; }
.count { display: inline-block; background: var(--warn-soft); color: var(--warn); border-radius: 999px; padding: 0 .55em; font-size: .8em; vertical-align: middle; }
.brand-lg { font-weight: 800; letter-spacing: -.02em; font-size: 1.05rem; margin-bottom: 18px; }
.brand-lg a { color: inherit; }
.muted { color: var(--muted); } .small { font-size: .85rem; } .mt { margin-top: 20px; } .r { text-align: right; } .pre { white-space: pre-wrap; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 860px) { .grid-2 { grid-template-columns: 1fr; } }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .4em; background: var(--accent); color: var(--accent-text); border: 1px solid transparent; border-radius: 10px; padding: 10px 18px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none !important; transition: transform .05s, opacity .15s; }
.btn:hover { opacity: .92; } .btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: progress; }
.btn-lg { padding: 13px 24px; font-size: 1.02rem; }
.btn-sm { padding: 6px 12px; font-size: .85rem; border-radius: 8px; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ok { background: var(--ok); color: #fff; }
.btn-danger { background: var(--err); color: #fff; }
.btn-danger-ghost { background: transparent; color: var(--err); border-color: var(--err); }
.icon-btn { background: transparent; border: 1px solid var(--border); border-radius: 10px; width: 36px; height: 36px; font-size: 1.3rem; cursor: pointer; color: var(--text); line-height: 1; }
.icon-btn:hover { background: var(--bg); }
.link-btn { background: none; border: 0; color: var(--accent-2); cursor: pointer; font: inherit; padding: 0; margin-bottom: 14px; }
.inline { display: inline; } .inline-forms { display: flex; gap: 6px; flex-wrap: wrap; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }

/* forms */
label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 14px; }
label > input, label > select, label > textarea, .input-prefix input { display: block; width: 100%; margin-top: 6px; padding: 10px 12px; font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 10px; outline: none; }
label > input:focus, label > select:focus, label > textarea:focus { border-color: var(--accent-2); box-shadow: 0 0 0 3px var(--accent-2-soft); }
label.check { display: flex; align-items: center; gap: 10px; font-weight: 500; }
label.check input { width: 18px; height: 18px; margin: 0; }
.hint { display: block; font-weight: 400; color: var(--muted); font-size: .8rem; margin-top: 4px; }
.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.input-prefix { display: flex; margin-top: 6px; }
.input-prefix span { background: var(--bg); border: 1px solid var(--border); border-right: 0; border-radius: 10px 0 0 10px; padding: 10px 12px; color: var(--muted); font-size: .85rem; white-space: nowrap; }
.input-prefix input { margin: 0; border-radius: 0 10px 10px 0; }
.inline-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.inline-row select, .inline-row input { padding: 10px 12px; font: inherit; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--text); min-width: 260px; }
.err { color: var(--err); background: var(--err-soft); padding: 10px 12px; border-radius: 10px; font-size: .9rem; }
.hp { position: absolute; left: -9999px; }
input[type=time] { padding: 6px 8px; font: inherit; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text); }

/* tables */
.tbl { width: 100%; border-collapse: collapse; font-size: .92rem; }
.tbl th { text-align: left; color: var(--muted); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.tbl td { padding: 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl.hours td { vertical-align: middle; }
code.copy { cursor: copy; }
code.copy.block { display: block; padding: 10px 12px; word-break: break-all; }
code.copy:hover { background: var(--accent-2-soft); }

/* badges & notices */
.badge { display: inline-block; font-size: .72rem; font-weight: 700; padding: 2px 8px; border-radius: 999px; vertical-align: middle; text-transform: uppercase; letter-spacing: .03em; }
.badge-ok { background: var(--ok-soft); color: var(--ok); } .badge-warn { background: var(--warn-soft); color: var(--warn); }
.badge-error { background: var(--err-soft); color: var(--err); } .badge-neutral { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }
.badge-info { background: var(--info-soft); color: var(--info); }
.notice { padding: 12px 14px; border-radius: 10px; margin-bottom: 12px; font-size: .92rem; }
.notice-warn { background: var(--warn-soft); color: var(--warn); } .notice-error { background: var(--err-soft); color: var(--err); }
.flash { position: sticky; top: 0; z-index: 10; padding: 12px 16px; text-align: center; font-weight: 600; font-size: .92rem; }
.flash-ok { background: var(--ok-soft); color: var(--ok); } .flash-error { background: var(--err-soft); color: var(--err); }
.flash-warn { background: var(--warn-soft); color: var(--warn); } .flash-info { background: var(--info-soft); color: var(--info); }
.tone-ok h1 { color: var(--ok); } .tone-error h1 { color: var(--err); }
.details { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; margin: 0 0 20px; }
.details dt { color: var(--muted); font-size: .9rem; } .details dd { margin: 0; }

/* admin nav */
.admin-nav { display: flex; align-items: center; gap: 22px; padding: 12px 20px; background: var(--surface); border-bottom: 1px solid var(--border); }
.admin-nav .brand { font-weight: 800; color: var(--text); letter-spacing: -.02em; }
.admin-nav .brand span { color: var(--muted); font-weight: 500; }
.admin-nav nav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.admin-nav nav a { color: var(--muted); padding: 6px 12px; border-radius: 8px; font-weight: 600; }
.admin-nav nav a.on, .admin-nav nav a:hover { color: var(--text); background: var(--bg); text-decoration: none; }
.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tabs a { padding: 5px 11px; border-radius: 8px; color: var(--muted); font-weight: 600; font-size: .88rem; }
.tabs a.on { background: var(--bg); color: var(--text); }
.settings-nav { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; }
.settings-nav a { padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border); color: var(--text); font-size: .88rem; font-weight: 600; background: var(--surface); }
details summary { cursor: pointer; padding: 6px 0; }
ol.help { padding-left: 20px; color: var(--muted); font-size: .9rem; } ol.help li { margin-bottom: 6px; }
.account { border: 1px solid var(--border); border-radius: 12px; padding: 14px; margin-bottom: 12px; }
.account-head { display: flex; justify-content: space-between; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.cal-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.cal-list li { display: flex; align-items: center; gap: 10px; }
.toggle { width: 40px; height: 22px; border-radius: 999px; border: 0; background: var(--border); position: relative; cursor: pointer; padding: 0; }
.toggle span { position: absolute; top: 2px; left: 2px; width: 18px; height: 18px; border-radius: 50%; background: #fff; transition: left .15s; box-shadow: 0 1px 2px rgba(0,0,0,.3); }
.toggle.on { background: var(--ok); } .toggle.on span { left: 20px; }

/* ===== public booking page ===== */
body.book-page { background: var(--bg); }
.book { max-width: 1040px; display: grid; grid-template-columns: 340px 1fr; gap: 0; background: var(--surface); border: 1px solid var(--border); border-radius: 18px; box-shadow: var(--shadow); overflow: hidden; margin: 32px auto; padding: 0; }
.book-info { padding: 32px 28px; border-right: 1px solid var(--border); background: linear-gradient(180deg, var(--surface), var(--bg)); }
.book-info h1 { font-size: 1.7rem; margin-bottom: 4px; }
.book-info .eyebrow { color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; font-weight: 700; margin: 24px 0 4px; }
.book-info .subtitle { color: var(--muted); font-size: 1.02rem; margin-bottom: 20px; }
.meta { list-style: none; padding: 0; margin: 0 0 18px; display: grid; gap: 10px; color: var(--text); font-weight: 500; }
.meta li { display: flex; align-items: center; gap: 10px; }
.meta svg { color: var(--muted); flex-shrink: 0; }
.tz-select { font: inherit; font-size: .9rem; border: 1px solid var(--border); background: var(--surface); color: var(--text); border-radius: 8px; padding: 6px 8px; max-width: 100%; }
.desc { color: var(--muted); font-size: .93rem; white-space: pre-wrap; }
.lang { margin-top: 28px; display: flex; gap: 4px; }
.lang button { background: transparent; border: 1px solid var(--border); color: var(--muted); border-radius: 8px; padding: 4px 10px; font: inherit; font-size: .8rem; font-weight: 700; cursor: pointer; }
.lang button.on { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.book-main { padding: 32px 28px; min-height: 520px; }
.step[hidden] { display: none; }
#step-cal { display: grid; grid-template-columns: 1fr 200px; gap: 28px; }
.cal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.cal-head h2 { margin: 0; font-size: 1.05rem; text-transform: capitalize; }
.cal-dow, .cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.cal-dow div { text-align: center; font-size: .72rem; color: var(--muted); font-weight: 700; text-transform: uppercase; padding: 4px 0; }
.day { aspect-ratio: 1; border: 0; border-radius: 10px; background: transparent; font: inherit; font-weight: 600; color: var(--muted); cursor: default; position: relative; }
.day.avail { background: var(--accent-2-soft); color: var(--accent-2); cursor: pointer; }
.day.avail:hover { outline: 2px solid var(--accent-2); }
.day.sel { background: var(--accent); color: var(--accent-text); }
.day.today::after { content: ''; position: absolute; bottom: 5px; left: 50%; width: 4px; height: 4px; margin-left: -2px; border-radius: 50%; background: currentColor; }
.day.off { opacity: .35; }
.cal-note { color: var(--muted); font-size: .85rem; min-height: 1.4em; margin: 12px 0 0; }
.slots h3 { font-size: .95rem; margin-bottom: 10px; color: var(--muted); }
.slot-list { display: grid; gap: 8px; max-height: 420px; overflow: auto; padding-right: 2px; }
.slot { border: 1px solid var(--accent-2); color: var(--accent-2); background: transparent; border-radius: 10px; padding: 10px; font: inherit; font-weight: 700; cursor: pointer; }
.slot:hover { background: var(--accent-2-soft); }
.chosen { background: var(--accent-2-soft); color: var(--accent-2); font-weight: 700; padding: 10px 14px; border-radius: 10px; display: inline-block; margin-bottom: 18px; }
#step-form form { max-width: 460px; }
.done-icon { width: 64px; height: 64px; border-radius: 50%; background: var(--ok-soft); color: var(--ok); display: grid; place-items: center; font-size: 2rem; font-weight: 800; margin-bottom: 18px; }
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--accent-2); border-radius: 50%; animation: spin .7s linear infinite; vertical-align: middle; margin-right: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 860px) {
  .book { grid-template-columns: 1fr; margin: 0; border-radius: 0; border: 0; box-shadow: none; }
  .book-info { border-right: 0; border-bottom: 1px solid var(--border); padding: 24px 16px; }
  .book-main { padding: 20px 16px; min-height: 0; }
  #step-cal { grid-template-columns: 1fr; }
  .slot-list { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); max-height: none; }
  main.wide, main.narrow { padding: 16px; }
  .admin-nav { padding: 10px 14px; gap: 12px; }
}