:root{
  --ink:#1c2420; --paper:#eef1ea; --surface:#ffffff; --surface-2:#e3e8dd; --border:#c9d0c1;
  --text:#1c2420; --text-muted:#5c6b5f;
  --accent:#1f7a6c; --accent-ink:#0d3f38; --accent-soft:#d9ede7;
  --indigo:#48579f; --indigo-ink:#2a3468; --indigo-soft:#e2e5f5;
  --amber:#c07a1f; --amber-ink:#6b430a; --amber-soft:#f6e6cd;
  --slate:#5f6b68; --slate-ink:#374140; --slate-soft:#e4e8e4;
  --danger:#b8452f; --danger-ink:#6e2515; --danger-soft:#f5ddd5;
  --shadow:0 10px 28px rgba(28,36,32,.12); --focus:#1f7a6c;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --ink:#e9ede6; --paper:#101513; --surface:#182220; --surface-2:#1f2b28; --border:#2c3a36;
    --text:#e9ede6; --text-muted:#9fb0a8;
    --accent:#54baa5; --accent-ink:#c9ede4; --accent-soft:#1c3a34;
    --indigo:#8b97d6; --indigo-ink:#d7dcf5; --indigo-soft:#242a4a;
    --amber:#e2a552; --amber-ink:#f6dfb8; --amber-soft:#3c2c14;
    --slate:#9aa8a2; --slate-ink:#dfe6e2; --slate-soft:#25302c;
    --danger:#e2795c; --danger-ink:#f7d9cd; --danger-soft:#3a2019;
    --shadow:0 10px 28px rgba(0,0,0,.5); --focus:#6fd0ba;
  }
}
:root[data-theme="dark"]{
  --ink:#e9ede6; --paper:#101513; --surface:#182220; --surface-2:#1f2b28; --border:#2c3a36;
  --text:#e9ede6; --text-muted:#9fb0a8;
  --accent:#54baa5; --accent-ink:#c9ede4; --accent-soft:#1c3a34;
  --indigo:#8b97d6; --indigo-ink:#d7dcf5; --indigo-soft:#242a4a;
  --amber:#e2a552; --amber-ink:#f6dfb8; --amber-soft:#3c2c14;
  --slate:#9aa8a2; --slate-ink:#dfe6e2; --slate-soft:#25302c;
  --danger:#e2795c; --danger-ink:#f7d9cd; --danger-soft:#3a2019;
  --shadow:0 10px 28px rgba(0,0,0,.5); --focus:#6fd0ba;
}

*{box-sizing:border-box;}
/* Elements toggled via the `hidden` attribute (login screen vs. app shell,
   panels, banners) must actually disappear even when they also carry a
   `display` rule of their own — author styles otherwise beat the browser's
   built-in `[hidden]{display:none}` default at equal specificity. */
[hidden]{ display:none !important; }
html,body{ height:100%; }
body{
  margin:0; background:var(--paper); color:var(--text);
  font-family:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.brand-text strong,.tab-btn,.panel-head h2{
  font-family:"Archivo",system-ui,"Segoe UI",sans-serif; text-wrap:balance;
}
.mono{ font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace; font-variant-numeric: tabular-nums; }
button{ font-family:inherit; }
a{ color:var(--accent); }
:focus-visible{ outline:2px solid var(--focus); outline-offset:2px; }

/* ---------- login screen ---------- */
.login-screen{
  min-height:100vh; display:flex; align-items:center; justify-content:center; padding:24px;
  background:var(--paper);
}
.login-card{
  max-width:380px; width:100%; background:var(--surface); border:1px solid var(--border);
  border-radius:16px; padding:32px 28px; text-align:center; box-shadow:var(--shadow);
}
.login-mark{ margin:0 auto 16px; width:48px; height:48px; }
.login-mark svg{ width:26px; height:26px; }
.login-card h1{ font-size:1.4rem; margin:0 0 8px; }
.login-sub{ color:var(--text-muted); font-size:.88rem; line-height:1.5; margin:0 0 20px; }
.login-error{ background:var(--danger-soft); color:var(--danger-ink); border-radius:8px; padding:10px 12px; font-size:.82rem; margin-bottom:16px; text-align:left; }
.login-note{ color:var(--text-muted); font-size:.74rem; margin-top:18px; line-height:1.5; }
.btn-google{
  display:flex; align-items:center; justify-content:center; gap:10px; width:100%;
  background:var(--surface); border:1px solid var(--border); color:var(--text); font-weight:600;
  font-size:.92rem; padding:12px 16px; border-radius:10px; text-decoration:none; cursor:pointer;
}
.btn-google:hover{ border-color:var(--accent); }

/* ---------- layout shell ---------- */
#app{ max-width:1180px; margin:0 auto; padding:0 20px 64px; }
.topbar{
  position:sticky; top:0; z-index:20; background:var(--paper);
  display:flex; align-items:center; gap:16px; flex-wrap:wrap;
  padding:14px 0 12px; border-bottom:1px solid var(--border);
  margin-bottom:22px;
}
.brand{ display:flex; align-items:center; gap:10px; margin-right:auto; }
.brand-mark{
  width:34px; height:34px; border-radius:8px; background:var(--accent-soft);
  display:flex; align-items:center; justify-content:center; flex:none;
}
.brand-mark svg{ width:19px; height:19px; }
.brand-text{ display:flex; flex-direction:column; line-height:1.2; }
.brand-text strong{ font-size:1.05rem; font-weight:800; letter-spacing:-0.01em; }
.brand-text span{ font-size:.72rem; color:var(--text-muted); letter-spacing:.02em; }

.tabs{ display:flex; gap:4px; background:var(--surface-2); padding:4px; border-radius:10px; overflow-x:auto; -webkit-overflow-scrolling:touch; }
.tab-btn{
  border:none; background:transparent; color:var(--text-muted); font-weight:600; font-size:.86rem;
  padding:8px 14px; border-radius:7px; cursor:pointer; white-space:nowrap; transition:background .15s,color .15s;
}
.tab-btn:hover{ color:var(--text); }
.tab-btn.active{ background:var(--surface); color:var(--accent-ink); box-shadow:var(--shadow); }

.user-menu{ display:flex; align-items:center; gap:10px; position:relative; }
.status{ font-size:.72rem; color:var(--text-muted); display:flex; align-items:center; gap:6px; }
.status .dot{ width:6px; height:6px; border-radius:50%; background:var(--accent); flex:none; }
.status.offline .dot{ background:var(--amber); }
.user-chip{
  width:34px; height:34px; border-radius:50%; background:var(--accent); color:#fff; border:none;
  font-weight:700; font-size:.9rem; cursor:pointer; flex:none;
}
.user-popover{
  position:absolute; top:44px; right:0; background:var(--surface); border:1px solid var(--border);
  border-radius:12px; box-shadow:var(--shadow); padding:14px; min-width:220px; z-index:30;
}
.user-popover-name{ font-weight:700; font-size:.88rem; }
.user-popover-email{ font-size:.76rem; color:var(--text-muted); margin-bottom:10px; word-break:break-all; }
.user-popover .btn{ width:100%; justify-content:center; }

.tab-panel{ display:none; }
.tab-panel.active{ display:block; animation:fade .18s ease; }
@keyframes fade{ from{opacity:0; transform:translateY(2px);} to{opacity:1; transform:none;} }

.section-head{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; margin-bottom:14px; flex-wrap:wrap; }
.section-head h1{ font-size:1.28rem; font-weight:800; margin:0; letter-spacing:-0.01em; }
.section-sub{ color:var(--text-muted); font-size:.84rem; margin-top:2px; }

.banner{
  display:flex; align-items:center; gap:10px; background:var(--accent-soft); color:var(--accent-ink);
  border-radius:10px; padding:10px 14px; font-size:.83rem; margin-bottom:16px; flex-wrap:wrap;
}
.banner button{
  margin-left:auto; border:none; background:transparent; color:var(--accent-ink); font-weight:700;
  font-size:.78rem; cursor:pointer; padding:4px 8px; border-radius:6px; flex:none;
}
.banner button:hover{ background:rgba(0,0,0,.06); }

.btn{
  border:1px solid var(--border); background:var(--surface); color:var(--text); font-weight:600;
  font-size:.83rem; padding:8px 14px; border-radius:8px; cursor:pointer; display:inline-flex; align-items:center; gap:6px;
  transition:border-color .15s, background .15s;
}
.btn:hover{ border-color:var(--accent); }
.btn-primary{ background:var(--accent); border-color:var(--accent); color:#fff; }
.btn-primary:hover{ background:var(--accent-ink); border-color:var(--accent-ink); }
.btn-danger{ color:var(--danger-ink); border-color:var(--danger-soft); background:var(--danger-soft); }
.btn-danger:hover{ border-color:var(--danger); }
.btn-ghost{ border-color:transparent; background:transparent; }
.btn-ghost:hover{ background:var(--surface-2); border-color:transparent; }
.icon-btn{
  border:none; background:transparent; color:var(--text-muted); cursor:pointer; font-size:1rem;
  width:36px; height:36px; border-radius:7px; display:flex; align-items:center; justify-content:center;
}
.icon-btn:hover{ background:var(--surface-2); color:var(--text); }

.nav-cluster{ display:flex; align-items:center; gap:8px; }
.nav-cluster .range-label{ font-weight:700; font-size:.92rem; min-width:150px; text-align:center; }

/* ---------- timetable grid (tablet/desktop) ---------- */
.grid-scroll{ overflow-x:auto; border-radius:12px; border:1px solid var(--border); background:var(--surface); }
.grid-timetable{ display:grid; grid-template-columns:104px repeat(5,minmax(150px,1fr)); min-width:880px; }
.cell-head{
  background:var(--surface-2); padding:10px 12px; font-size:.78rem; font-weight:700; color:var(--text-muted);
  text-transform:uppercase; letter-spacing:.04em; position:sticky; top:0;
}
.cell-head.corner{ background:var(--surface-2); }
.period-cell{
  background:var(--surface-2); padding:10px 12px; border-top:1px solid var(--border);
  display:flex; flex-direction:column; justify-content:center; gap:2px;
}
.period-cell .plabel{ font-weight:700; font-size:.8rem; }
.period-cell .ptime{ font-size:.72rem; color:var(--text-muted); }
.period-edit{ border:none; background:transparent; color:var(--text-muted); cursor:pointer; font-size:.68rem; text-align:left; padding:0; margin-top:2px; text-decoration:underline; text-underline-offset:2px; }
.period-edit:hover{ color:var(--accent); }

.slot{
  border-top:1px solid var(--border); border-left:4px solid var(--slot-color,var(--border));
  padding:9px 11px; cursor:pointer; min-height:64px; display:flex; flex-direction:column; gap:3px;
  background:var(--surface); transition:background .12s;
}
.slot:hover{ background:var(--surface-2); }
.slot .s-subject{ font-weight:700; font-size:.85rem; line-height:1.25; }
.slot .s-meta{ font-size:.74rem; color:var(--text-muted); }
.slot .s-flags{ margin-top:auto; display:flex; gap:6px; padding-top:2px; }
.slot .flag{ font-size:.68rem; color:var(--text-muted); display:flex; align-items:center; gap:3px; }
.slot.empty{ align-items:flex-start; justify-content:center; color:var(--text-muted); }
.slot.empty .s-subject{ font-weight:500; font-size:.78rem; color:var(--text-muted); }

/* ---------- timetable accordion (phone) ---------- */
.timetable-days{ display:none; flex-direction:column; gap:10px; }
.tt-day{ background:var(--surface); border:1px solid var(--border); border-radius:12px; overflow:hidden; }
.tt-day-head{
  width:100%; display:flex; align-items:center; justify-content:space-between; padding:14px 16px;
  background:none; border:none; cursor:pointer; font-family:inherit; text-align:left;
}
.tt-day-head .tt-day-name{ font-weight:800; font-size:.92rem; }
.tt-day-head .tt-day-count{ font-size:.76rem; color:var(--text-muted); }
.tt-day-body{ display:none; border-top:1px solid var(--border); }
.tt-day.open .tt-day-body{ display:block; }
.tt-day.open .tt-day-chevron{ transform:rotate(180deg); }
.tt-day-chevron{ transition:transform .15s; color:var(--text-muted); }
.tt-slot-row{
  display:flex; align-items:center; gap:10px; padding:12px 16px; border-top:1px solid var(--border);
  cursor:pointer; min-height:44px;
}
.tt-slot-row:first-child{ border-top:none; }
.tt-slot-row:active{ background:var(--surface-2); }
.tt-slot-row .tt-bar{ width:4px; align-self:stretch; border-radius:2px; background:var(--slot-color,var(--border)); flex:none; }
.tt-slot-row .tt-period{ font-size:.72rem; color:var(--text-muted); width:34px; flex:none; }
.tt-slot-row .tt-info{ flex:1; min-width:0; }
.tt-slot-row .tt-subject{ font-weight:700; font-size:.87rem; }
.tt-slot-row .tt-meta{ font-size:.74rem; color:var(--text-muted); }
.tt-slot-row .tt-flags{ font-size:.7rem; color:var(--text-muted); flex:none; }

/* ---------- swatches ---------- */
.swatches{ display:flex; gap:8px; flex-wrap:wrap; }
.swatch{
  width:34px; height:34px; border-radius:8px; border:2px solid transparent; cursor:pointer;
  display:flex; align-items:center; justify-content:center; background:var(--c);
}
.swatch.selected{ border-color:var(--text); }
.swatch.selected svg{ display:block; }
.swatch svg{ display:none; width:14px; height:14px; }

/* ---------- week view ---------- */
.week-grid{ display:grid; grid-template-columns:repeat(5,1fr); gap:12px; }
@media (max-width:900px){ .week-grid{ grid-template-columns:1fr; } }
.day-card{ background:var(--surface); border:1px solid var(--border); border-radius:12px; padding:14px; display:flex; flex-direction:column; gap:10px; }
.day-card.today{ border-color:var(--accent); box-shadow:0 0 0 1px var(--accent) inset; }
.day-card .dhead{ display:flex; align-items:baseline; justify-content:space-between; }
.day-card .dhead .dname{ font-weight:800; font-size:.88rem; }
.day-card .dhead .ddate{ font-size:.74rem; color:var(--text-muted); }
.agenda-row{ display:flex; gap:8px; align-items:baseline; font-size:.78rem; padding:6px 0; border-top:1px solid var(--border); cursor:pointer; }
.agenda-row:first-of-type{ border-top:none; }
.agenda-row:hover .a-subject{ color:var(--accent-ink); }
.agenda-row .a-num{ color:var(--text-muted); flex:none; width:20px; }
.agenda-row .a-subject{ font-weight:600; flex:1; }
.agenda-row .a-room{ color:var(--text-muted); font-size:.72rem; }
.agenda-empty{ font-size:.76rem; color:var(--text-muted); padding:6px 0; }
.day-notes-preview{ font-size:.76rem; color:var(--text-muted); background:var(--surface-2); border-radius:8px; padding:8px 10px; min-height:20px; white-space:pre-wrap; }
.day-notes-preview.empty{ font-style:italic; }
.day-todo-chip{ font-size:.7rem; color:var(--accent-ink); background:var(--accent-soft); border-radius:99px; padding:2px 8px; display:inline-flex; width:fit-content; }

/* ---------- month view ---------- */
.month-grid{ display:grid; grid-template-columns:repeat(7,1fr); gap:6px; }
.month-dow{ font-size:.7rem; font-weight:700; color:var(--text-muted); text-transform:uppercase; letter-spacing:.04em; text-align:center; padding-bottom:4px; }
.month-cell{
  background:var(--surface); border:1px solid var(--border); border-radius:9px; padding:6px 7px; min-height:64px;
  display:flex; flex-direction:column; gap:4px; cursor:pointer; text-align:left;
}
.month-cell:hover{ border-color:var(--accent); }
.month-cell:active{ background:var(--surface-2); }
.month-cell.outside{ opacity:.4; }
.month-cell.today{ border-color:var(--accent); box-shadow:0 0 0 1px var(--accent) inset; }
.month-cell.weekend{ background:var(--surface-2); }
.month-cell .mnum{ font-size:.76rem; font-weight:700; font-family:"IBM Plex Mono",monospace; }
.month-cell .mnote{ font-size:.65rem; color:var(--text-muted); overflow:hidden; text-overflow:ellipsis; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; }
.month-cell .mtodo{ font-size:.62rem; color:var(--accent-ink); font-weight:600; margin-top:auto; }

/* ---------- meetings ---------- */
.filter-row{ display:flex; gap:8px; margin-bottom:16px; flex-wrap:wrap; }
.chip{
  border:1px solid var(--border); background:var(--surface); color:var(--text-muted); font-weight:600;
  font-size:.78rem; padding:7px 14px; border-radius:99px; cursor:pointer;
}
.chip:hover{ border-color:var(--accent); color:var(--text); }
.chip.active{ background:var(--accent); border-color:var(--accent); color:#fff; }

.meeting-list{ display:flex; flex-direction:column; gap:10px; }
.meeting-card{ background:var(--surface); border:1px solid var(--border); border-radius:12px; padding:14px 16px; cursor:pointer; }
.meeting-card:hover{ border-color:var(--accent); }
.m-top{ display:flex; align-items:center; gap:10px; margin-bottom:6px; flex-wrap:wrap; }
.m-title{ font-weight:700; font-size:.94rem; flex:1; }
.m-date{ font-size:.74rem; color:var(--text-muted); font-family:"IBM Plex Mono",monospace; }
.m-attendees{ font-size:.76rem; color:var(--text-muted); margin-bottom:6px; }
.m-snippet{ font-size:.83rem; color:var(--text); line-height:1.45; overflow:hidden; text-overflow:ellipsis; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; }
.m-foot{ margin-top:8px; display:flex; gap:10px; align-items:center; }
.m-progress{ font-size:.72rem; color:var(--text-muted); }
.m-delete{ margin-left:auto; font-size:.9rem; }
.m-delete:hover{ background:var(--danger-soft); color:var(--danger-ink); }

.badge{ font-size:.68rem; font-weight:700; text-transform:uppercase; letter-spacing:.03em; padding:3px 9px; border-radius:99px; flex:none; }
.badge-accent{ background:var(--accent-soft); color:var(--accent-ink); }
.badge-indigo{ background:var(--indigo-soft); color:var(--indigo-ink); }
.badge-amber{ background:var(--amber-soft); color:var(--amber-ink); }
.badge-slate{ background:var(--slate-soft); color:var(--slate-ink); }
.badge.sample{ background:transparent; border:1px dashed var(--border); color:var(--text-muted); }
.badge.admin{ background:var(--accent-soft); color:var(--accent-ink); }
.badge.member{ background:var(--slate-soft); color:var(--slate-ink); }

.empty-state{ text-align:center; padding:48px 20px; color:var(--text-muted); font-size:.88rem; }

/* ---------- access management ---------- */
.access-form{ display:flex; gap:12px; flex-wrap:wrap; align-items:flex-end; background:var(--surface); border:1px solid var(--border); border-radius:12px; padding:16px; margin-bottom:18px; }
.access-form .field{ min-width:160px; flex:1; }
.access-list{ display:flex; flex-direction:column; gap:8px; }
.access-row{ display:flex; align-items:center; gap:12px; background:var(--surface); border:1px solid var(--border); border-radius:10px; padding:12px 14px; flex-wrap:wrap; }
.access-row .a-name{ font-weight:700; font-size:.88rem; }
.access-row .a-email{ font-size:.78rem; color:var(--text-muted); }
.access-row .a-meta{ flex:1; min-width:160px; }
.access-row .icon-btn{ margin-left:auto; }

/* ---------- overlay / panel ---------- */
.overlay{
  position:fixed; inset:0; background:rgba(10,15,13,.42); display:flex; justify-content:flex-end;
  z-index:100; animation:fadeIn .15s ease;
}
@keyframes fadeIn{ from{opacity:0;} to{opacity:1;} }
.overlay[hidden]{ display:none; }
.panel{
  width:min(440px,100%); height:100%; background:var(--paper); box-shadow:var(--shadow);
  display:flex; flex-direction:column; animation:slideIn .18s ease;
}
@keyframes slideIn{ from{ transform:translateX(24px); opacity:.6; } to{ transform:none; opacity:1; } }
.panel-head{ display:flex; align-items:center; justify-content:space-between; padding:18px 20px; border-bottom:1px solid var(--border); }
.panel-head h2{ font-size:1.02rem; font-weight:800; margin:0; }
.panel-body{ padding:18px 20px; overflow-y:auto; flex:1; display:flex; flex-direction:column; gap:16px; -webkit-overflow-scrolling:touch; }
.panel-foot{ padding:14px 20px; padding-bottom:calc(14px + env(safe-area-inset-bottom)); border-top:1px solid var(--border); display:flex; gap:10px; }
.panel-foot .btn{ flex:1; justify-content:center; }
.panel-foot .btn-danger{ flex:none; }

.field{ display:flex; flex-direction:column; gap:5px; }
.field label{ font-size:.74rem; font-weight:700; color:var(--text-muted); text-transform:uppercase; letter-spacing:.03em; }
.field input[type=text], .field input[type=email], .field input[type=date], .field input[type=time], .field textarea, .field select{
  border:1px solid var(--border); background:var(--surface); color:var(--text); border-radius:8px;
  padding:10px 11px; font-size:1rem; font-family:inherit; width:100%;
}
.field textarea{ resize:vertical; min-height:70px; line-height:1.45; }
.field-row{ display:flex; gap:10px; }
.field-row .field{ flex:1; }

.todo-list{ display:flex; flex-direction:column; gap:6px; }
.todo-row{ display:flex; align-items:center; gap:8px; }
.todo-row input[type=checkbox]{ width:18px; height:18px; accent-color:var(--accent); flex:none; }
.todo-row .t-text{ flex:1; font-size:.85rem; }
.todo-row .t-text.done{ text-decoration:line-through; color:var(--text-muted); }
.todo-row .icon-btn{ width:30px; height:30px; font-size:.85rem; }
.todo-add{ display:flex; gap:8px; margin-top:2px; }
.todo-add input{ flex:1; border:1px dashed var(--border); background:transparent; border-radius:8px; padding:9px 10px; font-size:.9rem; color:var(--text); }
.todo-add button{ flex:none; }

.confirm-overlay{
  position:fixed; inset:0; background:rgba(10,15,13,.5); display:flex; align-items:center; justify-content:center;
  z-index:200; animation:fadeIn .12s ease; padding:20px;
}
.confirm-card{
  background:var(--surface); border:1px solid var(--border); border-radius:12px; box-shadow:var(--shadow);
  padding:20px; width:min(340px,100%); display:flex; flex-direction:column; gap:6px;
}
.confirm-title{ margin:0; font-size:1rem; font-weight:800; }
.confirm-msg{ margin:0; font-size:.84rem; color:var(--text-muted); }
.confirm-actions{ display:flex; gap:10px; margin-top:12px; }
.confirm-actions .btn{ flex:1; justify-content:center; }

/* ============================= RESPONSIVE ============================= */
@media (max-width:720px){
  #app{ padding:0 14px 84px; }
  .topbar{ gap:10px; }
  .brand-text span{ display:none; }
  .tabs{ order:3; width:100%; }
  .user-menu{ order:2; margin-left:auto; }
  .status{ display:none; }
  .section-head h1{ font-size:1.1rem; }
  .section-head .nav-cluster{ width:100%; justify-content:space-between; }
  .nav-cluster .range-label{ min-width:0; flex:1; }

  /* Timetable: hide the wide grid, show the per-day accordion instead */
  .grid-scroll{ display:none; }
  .timetable-days{ display:flex; }

  .month-cell{ min-height:46px; padding:5px; }
  .month-cell .mnote{ display:none; }
  .month-dow{ font-size:.62rem; }

  .panel{ width:100%; }
  .access-form{ flex-direction:column; align-items:stretch; }
}
@media (max-width:420px){
  .tab-btn{ padding:7px 10px; font-size:.8rem; }
}