:root{--bg:#f7f9fb;--card:#fff;--ink:#1d2733;--muted:#5b6b7c;--brand:#0f6e7a;--brand2:#e7f3f4;--line:#e3e9ee;--bad:#b3261e;--busy:#fde8e6}
@media (prefers-color-scheme:dark){:root{--bg:#0f1519;--card:#172027;--ink:#e8eef2;--muted:#9fb0bd;--brand:#4fb3bf;--brand2:#16303a;--line:#24313a;--bad:#ff8a80;--busy:#3a1f1d}}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:Vazirmatn,Tahoma,sans-serif;background:var(--bg);color:var(--ink);line-height:1.9}
a{color:var(--brand);text-decoration:none}
.wrap{max-width:1040px;margin:auto;padding:0 16px}
header{position:sticky;top:0;background:var(--bg);border-bottom:1px solid var(--line);z-index:5}
nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.logo{font-weight:800;font-size:1.05rem}.logo span{color:var(--brand)}
.links{display:flex;gap:18px}.links a{color:var(--muted)}
@media(max-width:640px){.links{display:none}}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:10px 20px;border-radius:12px;font-weight:700;border:0;font:inherit;font-weight:700;cursor:pointer}
.btn.ghost{background:transparent;color:var(--brand);border:1.5px solid var(--brand)}
.btn.small{padding:6px 12px;font-size:.88rem}
.hero{padding:64px 0 40px}
.hero h1{font-size:clamp(1.7rem,4.5vw,2.6rem);line-height:1.5;margin:0 0 10px}
.hero p{color:var(--muted);font-size:1.08rem;max-width:620px;margin:0 0 26px}
.tag{display:inline-block;background:var(--brand2);color:var(--brand);padding:4px 14px;border-radius:99px;font-size:.88rem;font-weight:700;margin-bottom:14px}
.actions{display:flex;gap:10px;flex-wrap:wrap}
section{padding:40px 0}
h2{font-size:1.45rem;margin:0 0 20px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px}
.card h3{margin:0 0 6px;font-size:1.05rem;color:var(--brand)}
.card p{margin:0;color:var(--muted);font-size:.95rem}
.muted{color:var(--muted)}
.days,.times{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.day,.time{background:var(--card);border:1.5px solid var(--line);color:var(--ink);border-radius:12px;padding:8px 14px;font:inherit;cursor:pointer}
.time{min-width:76px}
.day.on,.time.on{border-color:var(--brand);background:var(--brand2);color:var(--brand);font-weight:700}
.form{display:grid;gap:12px;max-width:520px;margin-top:10px}
.form label{display:grid;gap:4px;font-size:.92rem;color:var(--muted)}
input,textarea,select{font:inherit;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);width:100%}
.chosen{font-weight:700;color:var(--brand)!important}
.err{color:var(--bad)!important}
.code{font-family:monospace;font-size:1.2rem;letter-spacing:1px;direction:ltr;display:inline-block}
.upstatus{margin-top:10px;font-size:.9rem;display:grid;gap:4px}
.hidden{display:none!important}
hr{border:0;border-top:1px solid var(--line);margin:16px 0}
footer{border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:.9rem;text-align:center}
/* admin */
.tabs{display:flex;gap:8px;margin:16px 0;flex-wrap:wrap}
.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
.toolbar select{width:auto}
.gridwrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--card)}
table.av{border-collapse:collapse;width:100%;min-width:640px;user-select:none}
table.av th,table.av td{border:1px solid var(--line);text-align:center;padding:0;font-size:.85rem}
table.av th{padding:8px 4px;background:var(--brand2);position:sticky;top:0}
table.av td.t{padding:6px;color:var(--muted);white-space:nowrap}
table.av td.c{cursor:pointer;height:34px}
table.av td.c.on{background:#2e9e6b;color:#fff}
table.av td.c.bk{background:var(--busy);color:var(--bad);cursor:not-allowed;font-size:.72rem}
table.av td.c.past{background:repeating-linear-gradient(45deg,transparent 0 4px,var(--line) 4px 6px);cursor:not-allowed}
.legend{display:flex;gap:14px;font-size:.85rem;color:var(--muted);margin:10px 0;flex-wrap:wrap}
.legend i{display:inline-block;width:14px;height:14px;border-radius:4px;vertical-align:middle;margin-left:4px}
.blist{display:grid;gap:10px}
.bitem{display:grid;gap:4px}
.bitem .row{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;align-items:center}
.bitem a.f{display:inline-block;margin-left:10px;font-size:.9rem}
.cancelled{opacity:.5}