:root{
  --bg:#f4faf9; --surface:#fff; --ink:#10302d; --muted:#53706d; --line:#d6e6e3;
  --brand:#0f766e; --brand-ink:#fff; --brand-soft:#d9f2ee; --accent:#e8590c;
  --ok:#157f3b; --warn:#9a6700; --danger:#b42318; --danger-soft:#fde8e6;
  --radius:14px; --shadow:0 1px 2px rgba(16,48,45,.06),0 6px 20px rgba(16,48,45,.06);
  --sat:env(safe-area-inset-top,0px); --sab:env(safe-area-inset-bottom,0px);
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){:root{--bg:#0c1b1a;--surface:#132826;--ink:#e6f4f1;--muted:#9bb8b4;--line:#244340;--brand:#2dd4bf;--brand-ink:#052e2a;--brand-soft:#17413d;--danger:#ff8a80;--danger-soft:#3b1d1a;--ok:#5ee08a;--warn:#f0b429;--shadow:none}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-tap-highlight-color:transparent}
h1,h2,h3{line-height:1.2;margin:0 0 .5rem}h1{font-size:1.6rem}h2{font-size:1.25rem}h3{font-size:1.05rem}
p{margin:.25rem 0}
.muted{color:var(--muted)}.small{font-size:.875rem}.right{text-align:right}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--surface);padding:8px 12px;z-index:99;border-radius:8px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
button,input,select,textarea{font:inherit;color:inherit}
.offline{background:var(--warn);color:#fff;text-align:center;padding:6px;font-size:.9rem}

/* layout: bottom tabs on phones, side rail on wide screens */
.shell{min-height:100vh;display:flex;flex-direction:column}
.topbar{position:sticky;top:0;z-index:10;background:var(--surface);border-bottom:1px solid var(--line);padding:calc(10px + var(--sat)) 16px 10px;display:flex;align-items:center;gap:12px}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:1.1rem;color:var(--brand)}
.brand svg{width:28px;height:28px;border-radius:8px}
.spacer{flex:1}
.nav{position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--line);display:flex;padding-bottom:var(--sab);z-index:10}
.nav button{flex:1;background:none;border:0;padding:8px 2px;min-height:56px;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:.72rem;color:var(--muted);cursor:pointer}
.nav button[aria-current=page]{color:var(--brand);font-weight:700}
.nav .ic{font-size:1.25rem;line-height:1}
main{flex:1;width:100%;max-width:980px;margin:0 auto;padding:16px 16px calc(86px + var(--sab))}
@media(min-width:820px){
  .nav{position:sticky;top:57px;bottom:auto;border:0;background:transparent;justify-content:center;gap:6px;padding:8px 16px;flex-wrap:wrap}
  .nav button{flex:0 0 auto;flex-direction:row;gap:8px;padding:8px 14px;min-height:40px;font-size:.95rem;border-radius:999px}
  .nav button[aria-current=page]{background:var(--brand-soft)}
  main{padding-bottom:32px}.shell{flex-direction:column}
}

/* components */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);margin-bottom:12px}
.grid{display:grid;gap:12px}.grid.cols{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}
.stack>*+*{margin-top:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:0 18px;border-radius:12px;border:1px solid var(--brand);background:var(--brand);color:var(--brand-ink);font-weight:600;cursor:pointer}
.btn.ghost{background:transparent;color:var(--brand)}.btn.danger{background:var(--danger);border-color:var(--danger);color:#fff}.btn.danger.ghost{background:transparent;color:var(--danger)}
.btn.sm{min-height:36px;padding:0 12px;font-size:.9rem}.btn.block{width:100%}
.btn[disabled]{opacity:.5;cursor:not-allowed}
label{display:block;font-weight:600;font-size:.9rem;margin-bottom:4px}
input,select,textarea{width:100%;min-height:44px;padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
textarea{min-height:80px;resize:vertical}
input[type=checkbox],input[type=radio]{width:auto;min-height:0}
.field{margin-bottom:12px}
.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.78rem;font-weight:600;background:var(--brand-soft);color:var(--brand)}
.badge.booked{background:var(--brand-soft);color:var(--brand)}.badge.completed{background:#dcfce7;color:var(--ok)}
.badge.cancelled,.badge.no-show{background:var(--danger-soft);color:var(--danger)}.badge.paid{background:#dcfce7;color:var(--ok)}.badge.unpaid{background:#fff4d6;color:var(--warn)}
@media(prefers-color-scheme:dark){.badge.completed,.badge.paid{background:#143d27}.badge.unpaid{background:#3b2f0b}}
.avatar{width:48px;height:48px;border-radius:50%;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-weight:700;flex:none}
.tabs{display:flex;gap:6px;margin-bottom:12px;overflow-x:auto}
.tabs button{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:8px 16px;min-height:40px;cursor:pointer;white-space:nowrap}
.tabs button[aria-pressed=true]{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.dates{display:flex;gap:8px;overflow-x:auto;padding:4px 2px 10px;scroll-snap-type:x proximity}
.dates button{flex:0 0 64px;scroll-snap-align:start;border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:8px 0;cursor:pointer;line-height:1.2}
.dates button b{display:block;font-size:1.2rem}
.dates button[aria-pressed=true]{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.dates button[disabled]{opacity:.4;cursor:not-allowed}
.slots{display:grid;grid-template-columns:repeat(auto-fill,minmax(84px,1fr));gap:8px}
.slots button{min-height:44px;border:1px solid var(--brand);background:var(--surface);color:var(--brand);border-radius:10px;font-weight:600;cursor:pointer}
.slots button[aria-pressed=true]{background:var(--brand);color:var(--brand-ink)}
.slots button[disabled]{border-color:var(--line);color:var(--muted);text-decoration:line-through;cursor:not-allowed;opacity:.6}
.stat{text-align:center}.stat b{display:block;font-size:1.8rem;color:var(--brand)}
.table{width:100%;border-collapse:collapse;font-size:.92rem}.table th,.table td{text-align:left;padding:8px;border-bottom:1px solid var(--line);vertical-align:top}
.scroll{overflow-x:auto}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-left:4px}
.notif.unread{border-left:4px solid var(--accent)}
.empty{text-align:center;padding:28px 12px;color:var(--muted)}
.error{background:var(--danger-soft);color:var(--danger);padding:10px 12px;border-radius:10px;margin-bottom:12px;font-weight:600}
.toast{position:fixed;left:50%;transform:translate(-50%,20px);bottom:calc(84px + var(--sab));background:#10302d;color:#fff;padding:10px 18px;border-radius:12px;opacity:0;pointer-events:none;transition:.25s;z-index:60;max-width:90vw}
.toast.show{opacity:1;transform:translate(-50%,0)}.toast.err{background:var(--danger)}
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:50;display:flex;align-items:flex-end;justify-content:center}
.modal{background:var(--surface);width:100%;max-width:560px;max-height:92vh;overflow:auto;border-radius:20px 20px 0 0;padding:20px 16px calc(20px + var(--sab))}
@media(min-width:820px){.modal-bg{align-items:center}.modal{border-radius:20px}}
.auth{max-width:440px;margin:0 auto;padding:calc(32px + var(--sat)) 16px 32px}
.hero{text-align:center;margin-bottom:20px}.hero .brand{justify-content:center;font-size:1.6rem}
.chips{display:flex;gap:8px;flex-wrap:wrap}.chip{border:1px dashed var(--brand);background:transparent;color:var(--brand);border-radius:999px;padding:6px 12px;cursor:pointer;min-height:36px}
.ref{font-family:ui-monospace,Menlo,monospace;font-weight:700;letter-spacing:.5px}
.success{text-align:center}.success .tick{width:64px;height:64px;border-radius:50%;background:var(--brand);color:var(--brand-ink);display:grid;place-items:center;font-size:2rem;margin:0 auto 12px}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}