/* Rooms (student and teacher): a mauve backdrop, one rounded shell, menu on the left, soft cards, plum stat tiles with rings. */
:root{
  --bg:#CBB9C8; --shell:#F6F1F0; --side:#EDE4E9; --tile:#EBE2E7; --tile-2:#E2D6DD;
  --plum:#7D6377; --plum-2:#6C5467; --on-plum:#FBF6F9;
  --ink:#2B2230; --ink-soft:#6F6371; --line:#DCCFD7;
  --accent:#5E4A6E; --accent-soft:#E4DAEA; --on-accent:#FFFFFF;
  --rose:#E59AAA; --sage:#9FC9C0; --honey:#EDC970; --lilac:#C6A9DF;
  --ok:#3B7A57; --ok-soft:#DDEDE3; --bad:#B0493A; --bad-soft:#F4DFDA; --warn:#94650F; --warn-soft:#F5E8CD;
  --f-display:"Newsreader", Georgia, serif; --f-body:"Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --paper:var(--shell); --paper-2:var(--tile-2); --card:var(--shell);
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root{
  --bg:#1A1519; --shell:#241D23; --side:#2C242B; --tile:#30272F; --tile-2:#3A2F38;
  --plum:#56404F; --plum-2:#4A3644; --on-plum:#F6EEF3;
  --ink:#EFE7EC; --ink-soft:#B5A8B2; --line:#43363F;
  --accent:#CDB2E3; --accent-soft:#3A2F45; --on-accent:#221A26;
  --ok:#7CC49A; --ok-soft:#1D2C23; --bad:#EE8E7C; --bad-soft:#3A2420; --warn:#E3B95C; --warn-soft:#352A16;
  color-scheme:dark;
}}
*{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.5;min-height:100vh}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
[hidden]{display:none!important}
h1,h2,h3{font-family:var(--f-display);font-weight:500;margin:0;line-height:1.15}

/* shell */
.shell{max-width:1320px;margin:22px auto;display:grid;grid-template-columns:232px minmax(0,1fr);background:var(--shell);border-radius:30px;overflow:hidden;min-height:calc(100vh - 44px);box-shadow:0 30px 70px -40px rgba(60,30,60,.45)}
.side{background:var(--side);padding:26px 0 22px 18px;display:flex;flex-direction:column;gap:22px;min-width:0}
.brand{font-family:var(--f-display);font-size:23px;line-height:1.05;padding-right:18px;color:var(--ink)}
.brand span{color:var(--accent)}
.me{display:flex;align-items:center;gap:12px;padding-right:18px}
.avatar{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(140deg,var(--lilac),var(--rose));color:#fff;font:500 22px var(--f-display);flex:none}
.me-name{font-size:14.5px;line-height:1.3}
.me-sub{font-size:12px;color:var(--ink-soft)}
.nav{display:flex;flex-direction:column;gap:4px;margin-top:6px}
.nav a,.nav button{display:flex;align-items:center;gap:12px;border:0;background:transparent;text-decoration:none;color:var(--ink-soft);font-size:14.5px;font-weight:500;padding:11px 16px;border-radius:16px 0 0 16px;cursor:pointer;text-align:left;width:100%}
.nav a:hover,.nav button:hover{color:var(--ink)}
.nav [aria-current="page"]{background:var(--shell);color:var(--ink);font-weight:600}
.nav svg{width:19px;height:19px;flex:none}
.nav .badge{margin-left:auto;margin-right:8px;min-width:20px;padding:0 6px;border-radius:99px;background:var(--plum);color:var(--on-plum);font-size:11.5px;text-align:center}
.side-foot{margin-top:auto}

.main{padding:30px clamp(18px,3vw,38px) 48px;min-width:0}
.hello{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin-bottom:24px}
.hello h1{font-size:clamp(28px,3.4vw,38px);letter-spacing:-.01em}
.hello p{margin:4px 0 0;color:var(--ink-soft);font-size:14.5px}
.pill{display:inline-flex;align-items:center;gap:8px;background:var(--tile);border-radius:99px;padding:7px 14px;font-size:13.5px;color:var(--ink)}
.pill b{font-weight:600}

/* cards */
.dash{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) 250px;gap:18px;align-items:start}
.span2{grid-column:span 2}
.stack{display:flex;flex-direction:column;gap:18px;min-width:0}
.card{background:var(--tile);border-radius:24px;padding:18px 20px;min-width:0}
.card-h{display:flex;justify-content:space-between;align-items:baseline;gap:10px;margin-bottom:12px}
.card-h h2{font-size:19px}
.card-h a,.card-h button{font-size:13px;color:var(--accent);text-decoration:none;border:0;background:transparent;cursor:pointer;padding:0}
.empty{color:var(--ink-soft);font-size:14px;padding:6px 0}
.white{background:var(--shell);border-radius:16px;padding:12px 14px}

/* stat tiles */
.stats{display:flex;flex-direction:column;gap:14px;background:var(--tile);border-radius:26px;padding:14px}
.stat{background:var(--plum);color:var(--on-plum);border-radius:20px;padding:16px 16px 14px;display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px}
.stat:nth-child(even){background:var(--plum-2)}
.stat-label{font-size:13.5px;opacity:.9}
.stat-sub{font-size:12.5px;opacity:.78;line-height:1.35}
.ring{position:relative;width:104px;height:104px}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring .track{stroke:rgba(255,255,255,.16)}
.ring .val{transition:stroke-dashoffset .9s cubic-bezier(.3,.7,.3,1)}
.ring-num{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font:500 24px var(--f-display);font-variant-numeric:tabular-nums}
.ring-num small{font-size:14px;opacity:.7;margin-left:1px;align-self:center;padding-top:5px}
@media (prefers-reduced-motion:reduce){.ring .val{transition:none}}

/* mini calendar + upcoming */
.sched{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:16px;align-items:start}
.cal{background:var(--shell);border-radius:18px;padding:12px 12px 10px}
.cal-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.cal-top b{font-size:14px;font-weight:600}
.cal-top button{border:0;background:transparent;width:30px;height:30px;border-radius:50%;cursor:pointer;color:var(--ink-soft);font-size:16px}
.cal-top button:hover{background:var(--tile)}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:2px;text-align:center}
.cal-grid .dow{font-size:10.5px;color:var(--ink-soft);padding:4px 0}
.cal-grid button{position:relative;border:0;background:transparent;aspect-ratio:1;border-radius:50%;font-size:12.5px;cursor:pointer;color:var(--ink);font-variant-numeric:tabular-nums;max-width:36px;justify-self:center;width:100%}
.cal-grid button.out{color:var(--ink-soft);opacity:.45}
.cal-grid button.today{background:var(--accent-soft);font-weight:600}
.cal-grid button.sel{background:var(--accent);color:var(--on-accent)}
.cal-grid button:hover:not(.sel){background:var(--tile)}
.cal-grid .dots{position:absolute;left:0;right:0;bottom:3px;display:flex;justify-content:center;gap:2px}
.cal-grid .dots i{width:4px;height:4px;border-radius:50%;background:var(--accent)}
.cal-grid .dots i.hw{background:var(--rose)}
.cal-grid button.sel .dots i{background:var(--on-accent)}
.up{display:flex;flex-direction:column;gap:8px}
.up-h{font-size:13px;color:var(--ink-soft);display:flex;justify-content:space-between;gap:8px}
.up-h button{border:0;background:transparent;color:var(--accent);font-size:12.5px;cursor:pointer;padding:0}
.up-item{display:flex;align-items:center;gap:10px;background:var(--shell);border-radius:99px;padding:5px 14px 5px 5px;text-decoration:none;color:inherit;min-width:0}
.up-item.now{box-shadow:inset 0 0 0 2px var(--accent)}
.up-item.past{opacity:.55}
.up-day{width:42px;height:42px;border-radius:50%;border:1.5px solid var(--line);display:grid;place-items:center;font:500 17px var(--f-display);flex:none;background:var(--tile)}
.up-item.hw .up-day{border-color:var(--rose)}
.up-text{min-width:0;font-size:13.5px;line-height:1.3}
.up-text b{display:block;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.up-text span{color:var(--ink-soft);font-size:12.5px}
.up-item .go{margin-left:auto;font-size:12px;color:var(--accent);white-space:nowrap}

/* the big button: the student joins the current lesson, Yana starts it */
.join{display:flex;align-items:center;gap:14px;background:var(--plum);color:var(--on-plum);text-decoration:none;border-radius:22px;padding:12px 22px 12px 12px;box-shadow:0 14px 30px -18px rgba(60,30,60,.7);transition:transform .15s,background .15s;max-width:100%}
.join:hover{background:var(--plum-2);transform:translateY(-1px)}
.join-play{width:46px;height:46px;border-radius:50%;background:var(--on-plum);color:var(--plum);display:grid;place-items:center;flex:none}
.join-play svg{width:18px;height:18px;margin-left:3px}
.join-text b{display:block;font-size:16px;font-weight:600}
.join-text span{display:block;font-size:13px;opacity:.85;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46vw}
@media (max-width:760px){.hello{flex-direction:column;align-items:stretch}.join-text span{max-width:70vw}}

/* lesson tiles with pictures */
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.tile{display:flex;flex-direction:column;gap:8px;text-decoration:none;color:inherit;min-width:0}
.tile-img{aspect-ratio:16/10;border-radius:18px;background:var(--tile-2) center/cover no-repeat;position:relative;overflow:hidden}
.tile-img .tag{position:absolute;left:10px;top:10px;background:rgba(255,255,255,.88);color:#2B2230;font-size:11.5px;font-weight:600;padding:3px 9px;border-radius:99px}
.tile-img .tag.fin{background:var(--ok);color:#fff}
.tile-title{font-family:var(--f-display);font-size:17px;line-height:1.25}
.tile-meta{font-size:12.5px;color:var(--ink-soft)}
.tile:hover .tile-img{filter:brightness(1.04)}
.bar{height:5px;border-radius:99px;background:var(--tile-2);overflow:hidden}
.bar span{display:block;height:100%;background:var(--accent);border-radius:99px}

/* lists inside cards */
.rows{display:flex;flex-direction:column;gap:8px}
.rowi{display:flex;align-items:center;gap:12px;background:var(--shell);border-radius:16px;padding:10px 14px;text-decoration:none;color:inherit;min-width:0}
.rowi .grow{flex:1;min-width:0}
.rowi b{font-weight:600}
.rowi .meta{font-size:12.5px;color:var(--ink-soft)}
.tagc{font-size:11.5px;padding:2px 9px;border-radius:99px;background:var(--tile);color:var(--ink-soft);white-space:nowrap}
.tagc.t-ok{background:var(--ok-soft);color:var(--ok)} .tagc.t-due{background:var(--warn-soft);color:var(--warn)} .tagc.t-bad{background:var(--bad-soft);color:var(--bad)} .tagc.t-acc{background:var(--accent-soft);color:var(--accent)}
.note-box{background:var(--accent-soft);border-radius:12px;padding:8px 12px;font-size:13.5px;margin-top:6px;white-space:pre-wrap}

.btn{border:1px solid var(--ink);background:var(--ink);color:var(--shell);border-radius:99px;padding:7px 16px;cursor:pointer;font-size:13px;font-weight:500;text-decoration:none;display:inline-block;line-height:1.4}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.small{padding:4px 12px;font-size:12.5px}
.seg{display:inline-flex;background:var(--shell);border-radius:99px;padding:3px;gap:2px}
.seg button{border:0;background:transparent;padding:6px 14px;border-radius:99px;font-size:13px;font-weight:600;color:var(--ink-soft);cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--plum);color:var(--on-plum)}

/* phones and small tablets: the menu becomes a bar on top */
@media (max-width:980px){
  .dash{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .stats{grid-column:1/-1;flex-direction:row;overflow-x:auto}
  .stat{flex:1 0 170px}
}
@media (max-width:760px){
  .shell{grid-template-columns:minmax(0,1fr);margin:0;border-radius:0;min-height:100vh}
  .side{padding:14px 0 0;gap:10px;position:sticky;top:0;z-index:30;box-shadow:0 6px 18px -14px rgba(0,0,0,.4)}
  .side .me,.brand{padding:0 16px}
  .brand{font-size:19px}
  .me{display:none}
  .nav{flex-direction:row;overflow-x:auto;gap:2px;margin:0;padding:0 10px;scrollbar-width:none}
  .nav a,.nav button{border-radius:14px 14px 0 0;padding:10px 12px;width:auto;white-space:nowrap;font-size:13.5px}
  .nav svg{display:none}
  .side-foot{display:none}
  .main{padding:20px 16px 40px}
  .dash{grid-template-columns:1fr}
  .span2{grid-column:auto}
  .sched{grid-template-columns:1fr}
  .stat{flex:1 0 150px}
  .ring{width:88px;height:88px}
}

/* room colours, chosen by the student or by Yana (lilac is the default above) */
:root[data-theme="sage"]{--bg:#B7C9BE;--side:#E3ECE6;--tile:#E1EAE4;--tile-2:#D4E0D8;--plum:#5F7A6B;--plum-2:#4F6A5B;--shell:#F4F7F4;--accent:#3F6B57;--accent-soft:#DCE9E1}
@media (prefers-color-scheme: dark){:root[data-theme="sage"]{--bg:#141A17;--side:#212A25;--tile:#27322C;--tile-2:#304036;--plum:#3F5A4B;--plum-2:#344C3F;--shell:#1C2420;--accent:#A9D1BC;--accent-soft:#2A3A31}}
:root[data-theme="sand"]{--bg:#D7C6B0;--side:#F0E8DD;--tile:#EEE5D9;--tile-2:#E4D8C8;--plum:#8A7055;--plum-2:#775F46;--shell:#FAF6F0;--accent:#7A5A36;--accent-soft:#EFE3D2}
@media (prefers-color-scheme: dark){:root[data-theme="sand"]{--bg:#1B1712;--side:#2A231B;--tile:#30281F;--tile-2:#3B3125;--plum:#5E4A35;--plum-2:#4F3E2C;--shell:#231D16;--accent:#E1C49D;--accent-soft:#3A2F22}}
:root[data-theme="mist"]{--bg:#B9C6D3;--side:#E4EAF0;--tile:#E2E8EF;--tile-2:#D5DEE8;--plum:#5C6E83;--plum-2:#4C5D71;--shell:#F4F6F9;--accent:#3E5A78;--accent-soft:#DCE5EF}
@media (prefers-color-scheme: dark){:root[data-theme="mist"]{--bg:#13171C;--side:#1F262E;--tile:#252D36;--tile-2:#2E3843;--plum:#3E4F63;--plum-2:#334255;--shell:#1A2027;--accent:#ADC6E3;--accent-soft:#28323E}}
:root[data-theme="rose"]{--bg:#D9B9BF;--side:#F1E3E5;--tile:#EFE1E3;--tile-2:#E6D2D6;--plum:#8E5F69;--plum-2:#7B4F59;--shell:#FAF3F4;--accent:#8A4458;--accent-soft:#F1DDE2}
@media (prefers-color-scheme: dark){:root[data-theme="rose"]{--bg:#1C1416;--side:#2B2023;--tile:#32262A;--tile-2:#3D2E33;--plum:#5E3E46;--plum-2:#4F333A;--shell:#241B1E;--accent:#E7AFBE;--accent-soft:#3B272D}}
:root[data-theme="butter"]{--bg:#DCCF9F;--side:#F2ECD6;--tile:#F0E9D2;--tile-2:#E7DDBF;--plum:#7E6F3E;--plum-2:#6C5E31;--shell:#FBF8EE;--accent:#6E5E1E;--accent-soft:#EFE6C6}
@media (prefers-color-scheme: dark){:root[data-theme="butter"]{--bg:#1A1812;--side:#29261B;--tile:#2F2B1F;--tile-2:#3A3526;--plum:#585033;--plum-2:#4A432A;--shell:#221F17;--accent:#E3D18F;--accent-soft:#373220}}
.swatches{display:flex;gap:10px;flex-wrap:wrap}
.swatches button{width:38px;height:38px;border-radius:50%;border:3px solid var(--shell);cursor:pointer;box-shadow:0 0 0 1px var(--line)}
.swatches button[aria-pressed="true"]{box-shadow:0 0 0 2px var(--ink)}
.swatches [data-theme-pick="lilac"]{background:linear-gradient(135deg,#CBB9C8 50%,#7D6377 50%)}
.swatches [data-theme-pick="sage"]{background:linear-gradient(135deg,#B7C9BE 50%,#5F7A6B 50%)}
.swatches [data-theme-pick="sand"]{background:linear-gradient(135deg,#D7C6B0 50%,#8A7055 50%)}
.swatches [data-theme-pick="mist"]{background:linear-gradient(135deg,#B9C6D3 50%,#5C6E83 50%)}
.swatches [data-theme-pick="rose"]{background:linear-gradient(135deg,#D9B9BF 50%,#8E5F69 50%)}
.swatches [data-theme-pick="butter"]{background:linear-gradient(135deg,#DCCF9F 50%,#7E6F3E 50%)}
.avatar.photo{background:var(--tile-2) center/cover no-repeat;color:transparent}