/* Layout: students get a narrow time-rail schedule on phones and a calendar + schedule split on desktop; the owner gets a dark sidebar workspace. Milk-tea neutrals, one cocoa accent. */
:root{
  --bg:#E8DDD0; --surface:#F8F3EC; --surface2:#EFE6DB; --field:#FBF8F3; --ink:#33271F; --muted:#6F5E52; --line:#D3C4B3; --track:#E3D6C6; --bar:#5B7452;
  --accent:#6A4733; --accent-ink:#FFF8F0; --accent-soft:#DDD1C2;
  --group:#3F5538; --group-bg:#DCE3D0; --one:#7E3E34; --one-bg:#F1DAD3;
  --ok:#2F5A36; --ok-bg:#D4E5D0; --wait:#664410; --wait-bg:#F2E0B6; --warn:#8F3630; --warn-bg:#F2D3CE; --mut:#4F4137; --mut-bg:#DDD1C2;
  --side:#3A2C23; --side-ink:#F3E9DC;
  --font-d:'Noto Sans TC','PingFang TC','Microsoft JhengHei',system-ui,sans-serif;
  --font-b:'Noto Sans TC','PingFang TC','Microsoft JhengHei',system-ui,sans-serif;
  --font-n:'Outfit','Noto Sans TC',system-ui,sans-serif;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#251D18; --surface:#31261F; --surface2:#3A2E26; --field:#2A211B; --ink:#F0E4D6; --muted:#BBA894; --line:#51423A; --track:#4A3C32; --bar:#8FB083;
  --accent:#E0B183; --accent-ink:#2A1E16; --accent-soft:#4A3A2E;
  --group:#A9C39A; --group-bg:#34412E; --one:#E7A28F; --one-bg:#4C2E27;
  --ok:#9CD0A0; --ok-bg:#2E4531; --wait:#E8C070; --wait-bg:#4A3A1A; --warn:#F0A9A2; --warn-bg:#4D2623; --mut:#CDBBA7; --mut-bg:#3B3028;
  --side:#1B1511; --side-ink:#F0E4D6; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#251D18; --surface:#31261F; --surface2:#3A2E26; --field:#2A211B; --ink:#F0E4D6; --muted:#BBA894; --line:#51423A; --track:#4A3C32; --bar:#8FB083;
  --accent:#E0B183; --accent-ink:#2A1E16; --accent-soft:#4A3A2E;
  --group:#A9C39A; --group-bg:#34412E; --one:#E7A28F; --one-bg:#4C2E27;
  --ok:#9CD0A0; --ok-bg:#2E4531; --wait:#E8C070; --wait-bg:#4A3A1A; --warn:#F0A9A2; --warn-bg:#4D2623; --mut:#CDBBA7; --mut-bg:#3B3028;
  --side:#1B1511; --side-ink:#F0E4D6; color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--font-b);font-size:16px;line-height:1.7;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:0 40px}
.wrap{max-width:720px;margin:0 auto}
.wrap.home,.wrap.wide{max-width:1180px}
h1,h2,h3{font-family:var(--font-d);font-weight:700;line-height:1.35;margin:0;text-wrap:balance}
h1{font-size:2rem} h2{font-size:1.4rem} h3{font-size:1.12rem}
p{margin:0}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.num{font-family:var(--font-n)}
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:22px 0 12px}
.bname{font-size:1.25rem;font-weight:700;line-height:1.3}
.bname.unset{color:var(--muted);font-weight:400;font-size:1.05rem}
.bsub{color:var(--muted);font-size:.8rem;letter-spacing:.14em}
.nav{display:flex;gap:6px;background:var(--surface);border-radius:999px;padding:5px}
.nav button{background:transparent;border:0;border-radius:999px;padding:0 22px;min-height:44px;font-weight:500}
.nav button.on{background:var(--accent);color:var(--accent-ink)}
.proto{background:var(--wait-bg);color:var(--wait);border-radius:12px;padding:10px 14px;font-size:.88rem;margin:6px 0 20px}
.stack{display:flex;flex-direction:column;gap:16px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.grow{flex:1;min-width:0}
.card{background:var(--surface);border-radius:20px;padding:18px}
.muted{color:var(--muted)} .small{font-size:.88rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:48px;padding:10px 22px;border-radius:14px;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);font-weight:500;text-align:center}
.btn.ghost{background:transparent;color:var(--accent);border-color:var(--line)}
.btn.sm{min-height:44px;padding:6px 16px;font-size:.92rem;border-radius:12px}
.btn.danger{background:var(--warn);border-color:var(--warn);color:var(--surface)}
.btn:disabled{background:var(--mut-bg);border-color:transparent;color:var(--mut);cursor:not-allowed}
.btn.block{width:100%}
/* schedule */
.home-grid{display:flex;flex-wrap:wrap;gap:32px;align-items:flex-start}
.home-main{flex:999 1 560px;min-width:0;display:flex;flex-direction:column;gap:18px}
.cal-card{display:none}
.dayhead{display:flex;flex-direction:column;gap:2px}
.dayhead h1{font-size:2.1rem}
.datebar{display:flex;align-items:center;gap:8px}
.week{display:flex;gap:4px;flex:1;min-width:0}
.wchip{flex:1;min-width:0;min-height:68px;border:0;border-radius:16px;background:var(--surface2);color:var(--ink);display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 0}
.wchip small{font-size:.75rem;color:var(--muted)}
.wchip b{font-family:var(--font-n);font-size:1.3rem;font-weight:500;line-height:1.3}
.wchip i{width:5px;height:5px;border-radius:50%;background:var(--accent)}
.wchip i.none{background:transparent}
.wchip.on{background:var(--accent);color:var(--accent-ink)} .wchip.on small{color:var(--accent-ink)} .wchip.on i{background:var(--accent-ink)}
.iconbtn{flex:0 0 auto;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--surface);font-size:1.1rem}
.iconbtn:disabled{opacity:.4;cursor:not-allowed}
.list{display:flex;flex-direction:column;gap:14px}
.rail{display:grid;grid-template-columns:62px minmax(0,1fr);gap:12px}
.rtime{padding-top:16px;line-height:1.25}
.rtime b{display:block;font-family:var(--font-n);font-size:1.45rem;font-weight:500}
.rtime span{color:var(--muted);font-size:.85rem}
.rtime.off b{color:var(--muted)}
.cls{background:var(--surface);border-radius:20px;padding:16px;display:flex;flex-wrap:wrap;gap:12px 20px;align-items:center}
.cls.off{background:var(--surface2)}
.cinfo{flex:1 1 240px;min-width:0;display:flex;flex-direction:column;gap:6px}
.cside{flex:0 0 190px;display:flex;flex-direction:column;gap:8px}
.cside .btn{width:100%}
.cinfo h3{font-size:1.15rem}
.cls.off h3{color:var(--mut)}
.meter{height:6px;border-radius:3px;background:var(--track)}
.meter i{display:block;height:6px;border-radius:3px;background:var(--bar)}
.meter.full{background:var(--line)}
.seat{font-size:.92rem;font-weight:500}
.seat span{font-weight:400;color:var(--muted)}
.tags{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.tag{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:3px 12px;font-size:.82rem;font-weight:500}
.tag.group{background:var(--group-bg);color:var(--group)} .tag.private{background:var(--one-bg);color:var(--one)}
.tag.off{background:var(--mut-bg);color:var(--mut)}
.meta{color:var(--muted);font-size:.92rem}
.pill{display:inline-flex;align-items:center;gap:7px;border-radius:999px;padding:3px 12px;font-size:.86rem;font-weight:700;white-space:nowrap}
.pill::before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor}
.pill.wait{background:var(--wait-bg);color:var(--wait)} .pill.ok{background:var(--ok-bg);color:var(--ok)}
.pill.warn{background:var(--warn-bg);color:var(--warn)} .pill.mut{background:var(--mut-bg);color:var(--mut)}
.empty{text-align:center;padding:36px 18px;border:2px dashed var(--line);border-radius:20px}
.empty .ring{width:54px;height:54px;border-radius:50%;border:3px solid var(--accent-soft);margin:0 auto 12px;display:grid;place-items:center;color:var(--accent);font-size:1.4rem}
/* calendar (desktop) */
.cal-head{display:flex;justify-content:space-between;align-items:center}
.cal-head h2{font-size:1.1rem}
.cal-wd,.cal-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:4px;text-align:center}
.cal-wd{font-size:.75rem;color:var(--muted)}
.cal-day{aspect-ratio:1;min-height:40px;border:2px solid transparent;border-radius:12px;background:transparent;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:0;font-family:var(--font-n);font-size:1rem;font-weight:500}
.cal-day i{width:5px;height:5px;border-radius:50%;background:var(--accent)}
.cal-day i.none{background:transparent}
.cal-day.today{border-color:var(--accent)}
.cal-day.on{background:var(--accent);color:var(--accent-ink)} .cal-day.on i{background:var(--accent-ink)}
.cal-day:disabled{color:var(--muted);cursor:default}
.legend{display:flex;gap:16px;flex-wrap:wrap;font-size:.8rem;color:var(--muted)}
@media (min-width:700px){
  .rail{grid-template-columns:96px minmax(0,1fr);gap:18px}
  .rtime b{font-size:1.85rem}
  .cls{padding:20px 22px;border-radius:22px}
}
@media (min-width:900px){
  .cal-card{display:flex;flex-direction:column;gap:14px;flex:0 0 340px;max-width:100%;background:var(--surface);border-radius:24px;padding:22px}
  .mob-only{display:none!important}
  .dayhead{flex-direction:row;align-items:baseline;gap:12px}
  .dayhead h1{font-size:2.1rem}
}
/* forms */
.field{display:flex;flex-direction:column;gap:6px}
.field label,.lbl{font-weight:500;font-size:.95rem}
.field .hint{color:var(--muted);font-size:.85rem}
input[type=text],input[type=tel],input[type=email],input[type=number],input[type=date],input[type=time],input[type=datetime-local],input[type=password],select,textarea{
  width:100%;min-height:48px;padding:9px 14px;border-radius:12px;border:1px solid var(--line);background:var(--field)}
textarea{min-height:84px;resize:vertical}
input[type=checkbox],input[type=radio]{width:22px;height:22px;accent-color:var(--accent);flex:0 0 auto;margin-top:2px}
.check{display:flex;gap:12px;align-items:flex-start}
.choice{display:flex;gap:12px;align-items:flex-start;border:1px solid var(--line);border-radius:16px;padding:14px}
.choice:has(input:checked){border:2px solid var(--accent);padding:13px;background:var(--field)}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.err{color:var(--warn);font-weight:500;min-height:1.2em}
.notice{border-radius:14px;padding:12px 16px;background:var(--wait-bg);color:var(--wait);line-height:1.65}
.notice.bad{background:var(--warn-bg);color:var(--warn)} .notice.good{background:var(--ok-bg);color:var(--ok)}
.notice b{color:inherit}
.kv{display:grid;grid-template-columns:7.5em 1fr;gap:6px 12px}
.kv dt{color:var(--muted)} .kv dd{margin:0;min-width:0;overflow-wrap:anywhere}
.steps{margin:0;padding-left:1.3em}
.steps2{list-style:none;margin:0;padding:0;display:flex;gap:8px}
.steps2 li{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;font-size:.82rem;color:var(--muted)}
.steps2 li span{width:30px;height:30px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-family:var(--font-n);font-size:.95rem}
.steps2 li.done,.steps2 li.now{color:var(--ink);font-weight:700}
.steps2 li.done span,.steps2 li.now span{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.timeline{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.timeline li{display:grid;grid-template-columns:6.5em 1fr;gap:10px;font-size:.92rem}
.timeline time{color:var(--muted);font-family:var(--font-n)}
.code{font-family:var(--font-n);letter-spacing:.04em;background:var(--surface2);border-radius:8px;padding:4px 10px;overflow-wrap:anywhere;font-size:1.05rem}
details{border-radius:14px;padding:4px 14px;background:var(--surface2)}
summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:500}
.foot{margin-top:36px;padding-top:14px;border-top:1px solid var(--line);color:var(--muted);font-size:.88rem;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.linkbtn{background:none;border:none;color:var(--accent);text-decoration:underline;padding:6px 0;min-height:44px}
/* admin */
.adm{display:flex;flex-wrap:wrap;gap:20px;align-items:flex-start;max-width:1180px;margin:18px auto 0}
.adm-side{flex:0 0 232px;background:var(--side);color:var(--side-ink);border-radius:24px;padding:22px 16px;display:flex;flex-direction:column;gap:20px;position:sticky;top:12px}
.adm-side .brand{padding:0 8px;line-height:1.35}
.adm-side .brand b{display:block;font-size:1.05rem}
.adm-side .brand span{font-size:.75rem;letter-spacing:.14em;opacity:.75}
.adm-nav{display:flex;flex-direction:column;gap:4px}
.adm-nav button,.adm-foot button{min-height:46px;padding:0 14px;border:0;border-radius:12px;background:transparent;color:var(--side-ink);text-align:left;font-weight:500}
.adm-nav button.on{background:var(--side-ink);color:var(--side);font-weight:700}
.adm-foot{display:flex;flex-direction:column;gap:4px;border-top:1px solid rgba(255,255,255,.18);padding-top:12px}
.adm-main{flex:1 1 560px;min-width:0;max-width:100%;display:flex;flex-direction:column;gap:20px}
.adm-title{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px}
.stat{text-align:left;background:var(--surface);border:0;border-radius:20px;padding:16px 18px}
.stat b{display:block;font-size:2.4rem;font-family:var(--font-n);font-weight:500;line-height:1.15}
.stat.attn b{color:var(--wait)}
.stat span{font-size:.92rem;font-weight:500}
.cols{display:flex;flex-wrap:wrap;gap:20px;align-items:flex-start}
.cols>.card{flex:1 1 300px;min-width:0}
.cols>.card.wide{flex:2 1 460px}
.qrow{display:flex;flex-direction:column;gap:10px;padding:14px 0;border-top:1px solid var(--line)}
.qrow:first-of-type{border-top:0}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:6px 16px;min-height:44px}
.chip.on{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.bk{background:var(--surface);border-radius:20px;padding:18px;display:flex;flex-direction:column;gap:12px}
.sep{border:0;border-top:1px solid var(--line);margin:4px 0;width:100%}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(20px + env(safe-area-inset-bottom,0px));background:var(--ink);color:var(--bg);padding:12px 20px;border-radius:12px;z-index:50;max-width:min(92vw,460px);box-shadow:0 6px 24px rgba(0,0,0,.25)}
@media (max-width:760px){
  .adm-side{flex:1 1 100%;min-width:0;max-width:100%;position:static;padding:14px}
  .adm-nav{flex-direction:row;overflow-x:auto;min-width:0}
  .adm-nav button{white-space:nowrap}
  .adm-foot{flex-direction:row;border-top:0;padding-top:0}
}
@media (max-width:480px){
  .kv{grid-template-columns:1fr}
  .kv dt{margin-top:6px}
  .timeline li{grid-template-columns:1fr;gap:0}
  .cside{flex:1 1 100%}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
.loading{padding:40px 0;text-align:center;color:var(--muted)}
.btn[aria-busy="true"]{opacity:.6;pointer-events:none}
.bk h3{font-size:1.1rem}