/* =====================================================================
   Aquauta base styles (moved out of wingman.html on Nov 3, 2026; nothing changed in them).
   Sections, in order:
     1. Design tokens (:root colors, fonts, radii) and dark mode
     2. Top bar, buttons, chips, cards (shared by every view)
     3. Classic views: Today, Tutor, Practice (games), Progress
     4. Overlays: command bar, sheets (dialogs), toast
     5. Responsive rules
     6. Day / night landscape glass (the page sets html.day / html.night / html.glass)
     7. Calm palette (Oct 28) and smoky glass: the CURRENT look's tokens override section 1 here
   The notebook interface, Studio, coach, sharing and live games are in app.css.
   ===================================================================== */
/* Wingman. Layout: quiet frame over a calm landscape. Today = up next + study plan + the course unit by unit;
   Tutor = topic rail | conversation. Works for any subject: every course is built from the student's own materials. */
:root{
  --bg:#F7F7F4; --surface:#FFFFFF; --sunk:#EFEFEA; --ink:#15171A; --ink2:#2B2F35; --muted:#5D636C; --faint:#868C95;
  --line:rgba(21,23,26,.12); --hair:rgba(21,23,26,.07);
  --accent:#2643E8; --accent-soft:#EEF1FF; --accent-ink:#FFFFFF; --flame:#D9631E; --sodium:#E8A33D;
  --ok:#13734E; --ok-soft:#E3F3EA; --warn:#94500B; --warn-soft:#FCEFD8; --learn:#2643E8; --learn-soft:#EEF1FF; --none:#DEDED8;
  --s1:#2643E8; --s2:#D9631E; --s3:#17845A; --s4:#8E4FD1; --s5:#0E8FA3;
  --stage:#0E0F12; --stage-ring:rgba(21,23,26,.10);
  --lk-red:#C8261A; --lk-orange:#B4530E; --lk-yellow:#8A6A00; --lk-green:#16774C; --lk-cyan:#08749F; --lk-blue:#2643E8; --lk-violet:#7A3FC4; --lk-teal:#0B7A8A;
  --f-display:"Fraunces", Georgia, "Iowan Old Style", serif;
  --f-body:"Nunito Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --f-mono:"Nunito Sans", "Segoe UI", system-ui, sans-serif;
  --r:12px; --hdr:58px; --zoom:1;
  --ease:cubic-bezier(.23,1,.32,1);
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0B0C0E; --surface:#141518; --sunk:#1B1C20; --ink:#ECEDEF; --ink2:#D5D8DC; --muted:#9AA0A8; --faint:#737982;
  --line:rgba(255,255,255,.14); --hair:rgba(255,255,255,.07);
  --accent:#8EA0FF; --accent-soft:#1C2340; --accent-ink:#0B0C0E; --flame:#F08A4B; --sodium:#F3C47A;
  --ok:#5FD49B; --ok-soft:#14291F; --warn:#F0B35A; --warn-soft:#33270F; --learn:#8EA0FF; --learn-soft:#1C2340; --none:#33363C;
  --s1:#8EA0FF; --s2:#F08A4B; --s3:#5FD49B; --s4:#C29BFF; --s5:#4FD1E0;
  --stage:#060708; --stage-ring:rgba(255,255,255,.08);
  --lk-red:#FF7A6E; --lk-orange:#FF9F5C; --lk-yellow:#F2D04B; --lk-green:#5FD49B; --lk-cyan:#5FD3FF; --lk-blue:#8EA0FF; --lk-violet:#C29BFF; --lk-teal:#4FD1E0;
  color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0B0C0E; --surface:#141518; --sunk:#1B1C20; --ink:#ECEDEF; --ink2:#D5D8DC; --muted:#9AA0A8; --faint:#737982;
  --line:rgba(255,255,255,.14); --hair:rgba(255,255,255,.07);
  --accent:#8EA0FF; --accent-soft:#1C2340; --accent-ink:#0B0C0E; --flame:#F08A4B; --sodium:#F3C47A;
  --ok:#5FD49B; --ok-soft:#14291F; --warn:#F0B35A; --warn-soft:#33270F; --learn:#8EA0FF; --learn-soft:#1C2340; --none:#33363C;
  --s1:#8EA0FF; --s2:#F08A4B; --s3:#5FD49B; --s4:#C29BFF; --s5:#4FD1E0;
  --stage:#060708; --stage-ring:rgba(255,255,255,.08);
  --lk-red:#FF7A6E; --lk-orange:#FF9F5C; --lk-yellow:#F2D04B; --lk-green:#5FD49B; --lk-cyan:#5FD3FF; --lk-blue:#8EA0FF; --lk-violet:#C29BFF; --lk-teal:#4FD1E0;
  color-scheme:dark}

html,body{height:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
.wrap{max-width:1200px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
h1,h2,h3{font-family:var(--f-display);line-height:1.12;text-wrap:balance;margin:0;font-weight:600;letter-spacing:-.02em}
button,select,textarea,input{font:inherit;color:inherit}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.mono,.num{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}

/* ---------- top bar ---------- */
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--bg)}
.bar{position:sticky;top:env(safe-area-inset-top,0px);z-index:8;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--hair)}
.bar .wrap{max-width:none;display:flex;align-items:center;gap:12px;height:var(--hdr)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);flex:none}
.brand .tile{width:30px;height:30px;border-radius:7px;background:var(--ink);color:var(--bg);display:grid;place-items:center;font-weight:600;font-size:15px;position:relative}
.brand .tile small{position:absolute;top:2px;left:4px;font-family:var(--f-mono);font-size:8px;font-weight:400;opacity:.75}
.brand b{font-weight:600;font-size:16px;letter-spacing:-.01em}
/* course switcher: each course is its own space */
.cswitch{position:relative;flex:0 1 auto;min-width:0}
#courseBtn{display:flex;align-items:center;gap:6px;max-width:260px;border:0;background:var(--hair);color:var(--ink);font:inherit;font-size:14px;font-weight:500;padding:7px 10px;border-radius:9px;cursor:pointer}
#courseBtn span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cmenu{position:absolute;left:0;top:calc(100% + 6px);z-index:30;min-width:240px;max-width:min(340px,calc(100vw - 32px));background:var(--surface);border-radius:12px;box-shadow:0 0 0 1px var(--line),0 18px 40px -16px rgba(0,0,0,.45);padding:6px;display:flex;flex-direction:column}
.cmenu[hidden]{display:none}
.day .cmenu{background:rgba(255,255,255,.97);backdrop-filter:blur(14px)} .night .cmenu{background:rgba(12,16,38,.97);backdrop-filter:blur(14px)}
.cmenu button{all:unset;box-sizing:border-box;display:flex;flex-direction:column;gap:1px;padding:8px 10px;border-radius:8px;cursor:pointer;color:var(--ink);font-size:14px}
.cmenu button:hover,.cmenu button:focus-visible{background:var(--hair)}
.cmenu button[aria-checked="true"]{background:var(--accent-soft,var(--hair));font-weight:600}
.cmenu button small{color:var(--muted);font-size:12px;font-weight:400}
.cmenu hr{border:0;border-top:1px solid var(--line);margin:4px 2px}
@media (max-width:820px){.brand b{display:none}#courseBtn{max-width:170px}}
.nav{display:flex;gap:2px;margin-left:10px}
.nav a{display:flex;align-items:center;gap:7px;padding:7px 12px;border-radius:8px;text-decoration:none;color:var(--muted);font-size:14px;font-weight:500;transition:background-color .16s ease,color .16s ease}
.nav a svg{display:none}
.nav a:hover{color:var(--ink)}
.nav a[aria-current="page"]{color:var(--ink);background:var(--hair)}
.spacer{flex:1 1 8px}
.searchbtn{display:flex;align-items:center;gap:10px;min-width:220px;padding:6px 7px 6px 11px;border-radius:9px;border:0;background:var(--surface);box-shadow:0 0 0 1px var(--line);color:var(--muted);font-size:14px;cursor:pointer;text-align:left}
.searchbtn span{flex:1}
.kbd{font-family:var(--f-mono);font-size:11px;line-height:1;padding:4px 6px;border-radius:5px;background:var(--sunk);box-shadow:inset 0 -1px 0 var(--line);color:var(--muted);flex:none;white-space:nowrap}
.levelchip{border:0;background:transparent;box-shadow:0 0 0 1px var(--line);border-radius:999px;padding:6px 11px;font-size:13px;color:var(--ink2);cursor:pointer;white-space:nowrap}
.pill{display:inline-flex;align-items:center;gap:7px;padding:6px 10px;border-radius:999px;border:0;background:var(--surface);box-shadow:0 0 0 1px var(--line);font-size:13px;color:var(--muted);cursor:pointer;white-space:nowrap}
.pill i{width:7px;height:7px;border-radius:50%;background:var(--faint)}
.pill.ok i{background:var(--ok)} .pill.warn i{background:var(--sodium)}
.pop{position:absolute;right:max(16px,env(safe-area-inset-right,0px));top:calc(var(--hdr) - 4px);width:min(360px,calc(100vw - 32px));background:var(--surface);border-radius:14px;box-shadow:0 0 0 1px var(--line),0 24px 48px -24px rgba(0,0,0,.45);padding:16px;z-index:12;display:flex;flex-direction:column;gap:12px;font-size:14px}
.pop p{margin:0;color:var(--muted)} .pop strong{color:var(--ink)}
.pop[hidden]{display:none}

main{padding-block:40px 64px;zoom:var(--zoom)}
#notices:empty{display:none}
.notice{background:var(--warn-soft);color:var(--ink);border-radius:var(--r);padding:12px 16px;font-size:14px;margin-bottom:20px}
.eyebrow{font-family:var(--f-mono);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.tt span,.display span{color:var(--faint)}

/* ---------- buttons, chips ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;background:var(--surface);box-shadow:0 0 0 1px var(--line);border-radius:10px;padding:9px 15px;cursor:pointer;font-weight:500;font-size:14px;color:var(--ink);text-decoration:none;transition:transform .12s var(--ease),box-shadow .16s ease,background-color .16s ease}
.btn:hover{box-shadow:0 0 0 1px color-mix(in srgb,var(--accent) 55%,var(--line))}
.btn:active:not(:disabled){transform:scale(.97)}
.btn.primary{background:var(--accent);color:var(--accent-ink);box-shadow:inset 0 1px 0 rgba(255,255,255,.18),0 1px 2px rgba(0,0,0,.18)}
.btn.primary .kbd{background:rgba(255,255,255,.2);color:inherit;box-shadow:none}
.btn.dark{background:var(--ink);color:var(--bg);box-shadow:none}
.btn.ghost{box-shadow:none;background:transparent;color:var(--muted)}
.btn.ghost:hover{color:var(--ink);background:var(--hair)}
.btn.big{padding:13px 20px;font-size:15px;border-radius:11px}
.btn.sm{padding:6px 11px;font-size:13px;border-radius:8px}
.btn:disabled{opacity:.45;cursor:default}
.linkbtn{border:0;background:none;color:var(--accent);cursor:pointer;padding:0;font:inherit;text-decoration:underline;text-underline-offset:3px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:500;padding:3px 10px;border-radius:999px;background:var(--sunk);color:var(--muted);white-space:nowrap}
.chip.mastered{background:var(--accent);color:var(--accent-ink)}
.chip.shaky{background:var(--warn-soft);color:var(--warn)}
.chip.learning{background:var(--learn-soft);color:var(--learn)}
.dots{display:flex;gap:3px}
.dots i{flex:1;height:4px;border-radius:2px;background:var(--none);min-width:4px}
.dots i.mastered{background:var(--accent)} .dots i.shaky{background:var(--sodium)} .dots i.learning{background:color-mix(in srgb,var(--accent) 38%,var(--surface))}
.card{background:var(--surface);border-radius:16px;box-shadow:0 0 0 1px var(--hair)}

/* ---------- Today ---------- */
.hero{display:flex;flex-wrap:wrap;gap:40px;align-items:stretch}
.hero-main{flex:1 1 520px;min-width:0;display:flex;flex-direction:column;justify-content:center;gap:0}
.display{font-size:clamp(34px,5vw,54px);line-height:1.04;letter-spacing:-.035em;margin-top:16px}
.lede{margin:20px 0 0;max-width:560px;font-size:17px;color:var(--ink2)}
.hero-main .row{margin-top:28px}
.classpos{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:22px;font-size:14px;color:var(--muted)}
.classpos select,.sel{padding:7px 10px;border-radius:9px;border:0;box-shadow:0 0 0 1px var(--line);background:var(--surface);max-width:100%;min-width:0}
.hero-tile{flex:1 1 360px;min-width:0;max-width:460px;border-radius:22px;background:var(--stage);color:#E9EAEC;padding:26px;display:flex;flex-direction:column;justify-content:space-between;gap:16px;box-shadow:0 30px 60px -32px rgba(0,0,0,.55),0 0 0 1px var(--stage-ring)}
.ht-top{display:flex;justify-content:space-between;align-items:baseline;font-family:var(--f-mono);font-size:12px;color:#9AA0A8}
.ht-sym{font-size:96px;font-weight:600;letter-spacing:-.05em;line-height:.9;color:#FFFFFF}
.ht-name{font-size:15px;color:#C9CCD1;max-width:30ch}
.hero-tile .dots i{background:rgba(255,255,255,.14);height:5px}
.hero-tile .dots i.mastered{background:#8EA0FF} .hero-tile .dots i.shaky{background:#F3C47A} .hero-tile .dots i.learning{background:rgba(142,160,255,.45)}
.ht-vis{display:flex;flex-direction:column;gap:6px;border-top:1px solid rgba(255,255,255,.1);padding-top:14px}
.ht-vis .eyebrow{color:#8A9099}
.ht-vis button{all:unset;cursor:pointer;font-size:14px;color:#E9EAEC;display:flex;align-items:center;gap:8px;padding:4px 0}
.ht-vis button::before{content:"";width:6px;height:6px;border-radius:50%;background:#8EA0FF;flex:none}
.ht-vis button:hover{color:#FFFFFF;text-decoration:underline;text-underline-offset:3px}
.ht-vis p{margin:0;font-size:13.5px;color:#9AA0A8}

.glance{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin-top:48px}
.stat{all:unset;box-sizing:border-box;cursor:pointer;background:var(--surface);border-radius:14px;box-shadow:0 0 0 1px var(--hair);padding:18px 20px;display:flex;flex-direction:column;gap:8px;transition:box-shadow .16s ease}
.stat:hover{box-shadow:0 0 0 1px var(--line)}
.stat .k{font-size:13px;color:var(--muted)}
.stat .v{display:flex;align-items:baseline;gap:8px}
.stat .v b{font-family:var(--f-mono);font-size:30px;font-weight:500;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat .v span{font-size:13px;color:var(--muted)}
.stat .t{font-size:15px;font-weight:500;line-height:1.35}

.course{margin-top:64px}
.course-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px}
.course-head h2{font-size:28px;letter-spacing:-.025em}
.seg{display:inline-flex;padding:3px;border-radius:10px;background:var(--hair);gap:2px}
.seg button{border:0;background:transparent;padding:6px 12px;border-radius:8px;font-size:13px;font-weight:500;color:var(--muted);cursor:pointer}
.seg.courses{flex-wrap:wrap;max-width:100%}
.seg.courses button{max-width:240px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.ptable{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:8px;margin-top:22px}
.ptile{position:relative;text-align:left;border:0;background:var(--surface);border-radius:12px;padding:11px 11px 13px;cursor:pointer;display:flex;flex-direction:column;gap:6px;box-shadow:0 0 0 1px var(--hair);min-width:0;transition:transform .16s var(--ease),box-shadow .16s ease}
@media (hover:hover) and (pointer:fine){.ptile:hover{transform:translateY(-2px);box-shadow:0 0 0 1px var(--line),0 10px 24px -14px rgba(0,0,0,.3)}}
.ptile.cur{box-shadow:0 0 0 2px var(--accent)}
.ptile.sel{background:var(--ink);color:var(--bg)}
.ptile.sel .p-n,.ptile.sel .p-name,.ptile.sel .p-pct{color:color-mix(in srgb,var(--bg) 70%,var(--ink))}
.p-top{display:flex;justify-content:space-between;font-family:var(--f-mono);font-size:11px;color:var(--muted)}
.p-pct{color:var(--muted)}
.p-sym{font-size:28px;font-weight:600;letter-spacing:-.03em;line-height:1}
.p-name{font-size:11.5px;line-height:1.3;color:var(--ink2);min-height:30px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.p-here{position:absolute;top:-9px;right:8px;padding:1px 7px;border-radius:999px;background:var(--accent);color:var(--accent-ink);font-size:10px;font-weight:600}
.legend{grid-column:2 / span 6;grid-row:1;align-self:center;padding:0 16px;display:flex;flex-wrap:wrap;gap:12px 24px;font-size:12.5px;color:var(--ink2)}
.legend span{display:inline-flex;align-items:center;gap:7px}
.legend i{width:14px;height:4px;border-radius:2px}
.legend p{flex-basis:100%;margin:0;color:var(--muted)}
.ghosttile{border-radius:12px;border:1px dashed var(--line);display:flex;align-items:center;justify-content:center;text-align:center;padding:10px;font-size:12px;color:var(--muted)}
.chpanel{margin-top:16px;padding:8px}
.chpanel-h{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px;padding:14px 14px 8px}
.chpanel-h h3{font-size:18px;letter-spacing:-.015em}
.secrow{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;padding:12px 14px;border-radius:12px}
.secrow:hover{background:var(--hair)}
.secrow.next{background:var(--accent-soft)}
.secrow .sid{width:44px;font-family:var(--f-mono);font-size:13px;color:var(--muted)}
.secrow .stl{flex:1 1 240px;min-width:0;font-size:15px;font-weight:500;text-align:left;border:0;background:none;padding:0;cursor:pointer;color:var(--ink)}
.secrow .svis{font-size:12.5px;color:var(--muted);min-width:110px}
.secrow .acts{display:flex;gap:6px}

/* ---------- Tutor ---------- */
main[data-view="tutor"]{max-width:none;padding:0;padding-left:0;padding-right:0}
main[data-view="tutor"] + footer{display:none}
main[data-view="tutor"]{zoom:1}
main[data-view="tutor"] .msgs,main[data-view="tutor"] .rail{zoom:var(--zoom)}
.tlayout{display:grid;grid-template-columns:260px minmax(0,1fr);height:calc(100dvh - var(--hdr) - env(safe-area-inset-top,0px) - env(safe-area-inset-bottom,0px));min-height:560px}
.rail{border-right:1px solid var(--hair);padding:24px 18px;display:flex;flex-direction:column;gap:20px;overflow:auto;min-width:0}
.rail h2{font-size:20px;letter-spacing:-.02em}
.rail p{margin:0;font-size:13.5px;color:var(--muted)}
.rail p strong{color:var(--ink)}
.rail .group{display:flex;flex-direction:column;gap:4px}
.rail .group .eyebrow{margin-bottom:6px}
.rlink{all:unset;cursor:pointer;display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:8px;font-size:13.5px;color:var(--ink2)}
.rlink:hover{background:var(--hair);color:var(--ink)}
.rlink:focus-visible{outline:2px solid var(--accent)}
.rlink.on{background:var(--sunk);color:var(--ink);font-weight:500}
.rail .finish{margin-top:auto;display:flex;flex-direction:column;gap:8px}
.chat{border-left:1px solid var(--hair);display:flex;flex-direction:column;min-width:0;min-height:0}
.chat .msgs,.chat .quick,.chat .composer,.chat .attach-chip{padding-left:max(22px,calc((100% - 820px) / 2));padding-right:max(22px,calc((100% - 820px) / 2))}
.msgs{flex:1;overflow:auto;padding:22px 22px 8px;display:flex;flex-direction:column;gap:20px}
.msg{min-width:0;overflow-wrap:anywhere;font-size:15px;line-height:1.62}
.msg p{margin:0 0 10px} .msg p:last-child{margin:0}
.msg ul,.msg ol{margin:4px 0 10px;padding-left:22px}
.msg code{font-family:var(--f-mono);font-size:13px;background:var(--sunk);padding:1px 5px;border-radius:5px}
.msg strong{font-weight:600}
.msg.tlayout{align-self:stretch}
.msg.student{align-self:flex-end;max-width:85%;background:var(--sunk);padding:10px 14px;border-radius:14px 14px 4px 14px}
.msg .who{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);margin-bottom:6px}
.msg .who i{width:18px;height:18px;border-radius:5px;background:var(--ink);color:var(--bg);font-style:normal;font-size:10px;font-weight:600;display:inline-grid;place-items:center}
.msg.student .who{display:none}
.msg.pending .body{color:var(--muted)}
.lk{font-weight:500;text-decoration:underline;text-decoration-style:dotted;text-underline-offset:3px;border-radius:4px;padding:0 2px;background:color-mix(in srgb,currentColor 9%,transparent)}
.lk-red{color:var(--lk-red)} .lk-orange{color:var(--lk-orange)} .lk-yellow{color:var(--lk-yellow)} .lk-green{color:var(--lk-green)} .lk-cyan{color:var(--lk-cyan)} .lk-blue{color:var(--lk-blue)} .lk-violet{color:var(--lk-violet)} .lk-teal{color:var(--lk-teal)}
.toolnote:empty{display:none}
.toolnote{display:inline-flex;margin-top:10px;font-family:var(--f-mono);font-size:11.5px;color:var(--ok);background:var(--ok-soft);padding:4px 9px;border-radius:7px}
.shimmer{display:inline-block;width:64px;height:8px;border-radius:4px;background:linear-gradient(90deg,var(--sunk) 0%,var(--line) 50%,var(--sunk) 100%);background-size:200px 8px;animation:shim 1.4s linear infinite;vertical-align:middle;margin-right:8px}
@keyframes shim{0%{background-position:-200px 0}100%{background-position:200px 0}}
.photo-tag{font-family:var(--f-mono);font-size:11px;color:var(--muted);display:block;margin-bottom:4px}
.quick{display:flex;gap:6px;flex-wrap:wrap;padding:8px 16px 0}
.quick .btn{font-size:12.5px;padding:5px 10px;border-radius:999px}
.attach-chip{display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--muted);padding:8px 18px 0}
.attach-chip button{border:0;background:none;color:var(--accent);cursor:pointer;padding:0}
.composer{padding:10px 14px 14px}
.composer .box{display:flex;align-items:flex-end;gap:6px;padding:7px;border-radius:14px;background:var(--surface);box-shadow:0 0 0 1px var(--line),0 8px 24px -18px rgba(0,0,0,.3)}
.composer textarea{flex:1;min-width:0;resize:none;border:0;outline:none;background:transparent;font-size:15px;line-height:1.5;padding:6px 8px;min-height:48px;max-height:200px}
.iconbtn{width:38px;height:38px;flex:none;border-radius:9px;border:0;background:transparent;color:var(--muted);display:grid;place-items:center;cursor:pointer}
.iconbtn:hover{background:var(--hair);color:var(--ink)}
.welcome{margin:auto 0;padding:12px 0;display:flex;flex-direction:column;gap:14px}
.welcome h3{font-size:22px;letter-spacing:-.02em}
.welcome p{margin:0;color:var(--muted)}
.starts{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:8px}
.start{all:unset;box-sizing:border-box;cursor:pointer;padding:12px 14px;border-radius:12px;background:var(--surface);box-shadow:0 0 0 1px var(--line),0 2px 0 var(--hair);display:flex;flex-direction:column;gap:3px;transition:transform .12s var(--ease)}
.start:active{transform:scale(.98)} .start:focus-visible{outline:2px solid var(--accent)}
.start b{font-weight:500;font-size:14px} .start span{font-size:12.5px;color:var(--muted)}
.empty{padding:40px 20px;text-align:center;color:var(--muted)}

/* ---------- Practice ---------- */
.pr-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin-bottom:28px}
.pr-title h1{font-size:clamp(28px,3.6vw,40px);letter-spacing:-.03em;margin-top:10px}
.pr-tools{display:flex;gap:8px;align-items:center;flex-wrap:wrap;min-width:0}
.pr-empty{background:var(--surface);border-radius:16px;box-shadow:0 0 0 1px var(--hair);padding:40px 20px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px}
.pr-empty h3{font-size:20px} .pr-empty p{margin:0;color:var(--muted);max-width:520px}
.pr-err{color:var(--warn)!important;font-weight:500}
.pr-src{font-size:12.5px;color:var(--muted);margin:16px 0 0}
.spinner{width:30px;height:30px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--accent);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.mode-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.mode-tile{text-align:left;cursor:pointer;border:0;background:var(--surface);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:8px;min-height:168px;box-shadow:0 0 0 1px var(--hair),0 3px 0 var(--hair);transition:transform .16s var(--ease),box-shadow .16s ease}
.mode-tile:hover{transform:translateY(-2px);box-shadow:0 0 0 1px var(--line),0 3px 0 var(--line)}
.mode-tile:active{transform:translateY(1px)}
.mt-k{font-weight:600;font-size:20px;letter-spacing:-.02em;display:flex;align-items:center;gap:10px}
.mt-k i{width:10px;height:10px;border-radius:3px;background:var(--c,var(--accent))}
.mode-tile.a2{--c:var(--s3)} .mode-tile.a3{--c:var(--s2)} .mode-tile.a4{--c:var(--s4)} .mode-tile.a5{--c:var(--s5)}
.mt-l{color:var(--muted);font-size:14px;flex:1}
.mt-m{font-family:var(--f-mono);font-size:12px;color:var(--ink2)}
.mode-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.mode-name{font-weight:600;font-size:20px;letter-spacing:-.02em;margin-right:auto}
.tog{display:flex;gap:6px;align-items:center;font-size:13.5px;color:var(--muted)}
.pbar{height:6px;background:var(--none);border-radius:3px;overflow:hidden;margin-bottom:18px}
.pbar i{display:block;height:100%;background:var(--accent);width:0;transition:width .3s var(--ease)}
.done-card{background:var(--surface);border-radius:16px;box-shadow:0 0 0 1px var(--hair);padding:32px 20px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:10px}
.done-card h3{font-size:22px} .done-card p{margin:0;color:var(--muted)}
.done-card .row{justify-content:center;margin-top:6px}
.fc-stage{perspective:1400px}
.fc{display:block;width:100%;max-width:720px;margin:0 auto;height:min(52vh,340px);border:0;background:none;padding:0;cursor:pointer;color:inherit}
.fc-in{position:relative;width:100%;height:100%;transition:transform .5s cubic-bezier(.2,.7,.2,1);transform-style:preserve-3d}
.fc.flip .fc-in{transform:rotateY(180deg)}
.fc-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:18px;background:var(--surface);box-shadow:0 0 0 1px var(--hair),0 18px 40px -24px rgba(0,0,0,.35);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:28px;gap:12px;overflow:auto}
.fc-back{transform:rotateY(180deg);background:var(--sunk)}
.fc-tag{font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.fc-txt{font-size:clamp(22px,4vw,34px);font-weight:600;letter-spacing:-.02em;text-align:center;line-height:1.25;text-wrap:balance}
.fc-txt.sm{font-size:clamp(16px,2.4vw,20px);font-weight:400;letter-spacing:0;line-height:1.5}
.fc-hint{text-align:center;color:var(--muted);font-size:13px;margin:12px 0}
.fc-actions{display:flex;justify-content:center;gap:12px}
.btn.no{box-shadow:0 0 0 1px var(--sodium);color:var(--warn)} .btn.yes{box-shadow:0 0 0 1px var(--ok);color:var(--ok)}
.ln-meter{display:flex;flex-direction:column;gap:6px;margin-bottom:18px;font-size:13px;color:var(--muted)}
.ln-meter>div{display:flex;height:8px;border-radius:4px;background:var(--none);overflow:hidden}
.ln-meter i{display:block;height:100%;transition:width .4s var(--ease)}
.ln-meter i.m{background:var(--accent)} .ln-meter i.l{background:color-mix(in srgb,var(--accent) 38%,var(--surface))}
.ln-card{background:var(--surface);border-radius:18px;box-shadow:0 0 0 1px var(--hair);padding:24px;display:flex;flex-direction:column;gap:18px}
.ln-q{display:flex;flex-direction:column;gap:6px}
.ln-prompt{font-size:28px;font-weight:600;letter-spacing:-.025em}
.ln-prompt.sm{font-size:18px;font-weight:400;letter-spacing:0;line-height:1.5}
.ln-choices{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:10px}
.choice{display:flex;gap:12px;align-items:flex-start;text-align:left;border:0;background:var(--surface);border-radius:12px;padding:14px 16px;cursor:pointer;font-size:14.5px;line-height:1.45;box-shadow:0 0 0 1px var(--line),0 3px 0 var(--line);transition:transform .12s var(--ease),box-shadow .12s ease}
.choice:hover:not(:disabled){box-shadow:0 0 0 1px var(--accent),0 3px 0 color-mix(in srgb,var(--accent) 40%,transparent)}
.choice:active:not(:disabled){transform:translateY(2px);box-shadow:0 0 0 1px var(--accent),0 1px 0 var(--line)}
.choice .kbd{background:var(--sunk)}
.choice.right{background:var(--ok-soft);box-shadow:0 0 0 2px var(--ok),0 3px 0 color-mix(in srgb,var(--ok) 40%,transparent)} .choice.right .kbd{background:var(--ok);color:var(--surface)}
.choice.wrong{background:var(--warn-soft);box-shadow:0 0 0 2px var(--sodium),0 3px 0 color-mix(in srgb,var(--sodium) 40%,transparent)} .choice.wrong .kbd{background:var(--sodium);color:#15171A}
.ln-write .row{margin-top:6px} .ln-write input{flex:1;min-width:0;padding:12px 14px;font-size:16px;border:0;box-shadow:0 0 0 1px var(--line);border-radius:10px;background:var(--bg);color:var(--ink)}
.ln-write .linkbtn{margin-top:8px;font-size:13.5px}
.fb{border-radius:12px;padding:14px 16px;background:var(--sunk);font-size:14.5px;display:flex;flex-direction:column;gap:10px;margin:0;animation:rise .22s var(--ease)}
@keyframes rise{from{opacity:0;transform:translateY(8px)}}
.fb.ok{background:var(--ok-soft)} .fb.bad{background:var(--warn-soft)}
.fb strong{color:var(--ink)}
.mt-time{font-family:var(--f-mono);font-size:20px;font-variant-numeric:tabular-nums}
.mt-start{background:var(--surface);border-radius:16px;box-shadow:0 0 0 1px var(--hair);padding:40px 20px;text-align:center;display:flex;flex-direction:column;gap:12px;align-items:center}
.mt-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,200px),1fr));gap:10px}
.mt-tile{min-height:110px;border:0;background:var(--surface);box-shadow:0 0 0 1px var(--line),0 3px 0 var(--hair);border-radius:12px;padding:12px;cursor:pointer;font-size:13.5px;line-height:1.4;transition:opacity .25s,transform .25s;overflow:hidden;display:-webkit-box;-webkit-line-clamp:6;-webkit-box-orient:vertical;text-align:center}
.mt-tile.t{font-weight:600;font-size:16px;display:flex;align-items:center;justify-content:center}
.mt-tile.sel{box-shadow:0 0 0 2px var(--accent);background:var(--accent-soft)}
.mt-tile.miss{box-shadow:0 0 0 2px var(--sodium);background:var(--warn-soft);animation:shake .35s}
.mt-tile.gone{opacity:0;transform:scale(.9);pointer-events:none}
@keyframes shake{25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
.bz-score{font-family:var(--f-mono);font-weight:500;font-size:20px;color:var(--accent)}
.bz-top{display:flex;justify-content:space-between;align-items:center;gap:10px;font-family:var(--f-mono);font-size:13px;color:var(--muted);margin-bottom:8px}
.streak{color:var(--warn);font-weight:600}
.bz-q{font-size:clamp(20px,3vw,28px);font-weight:600;letter-spacing:-.02em;line-height:1.3;background:var(--surface);box-shadow:0 0 0 1px var(--hair);border-radius:16px;padding:24px;text-align:center;text-wrap:balance}
.bz-timer{height:6px;background:var(--none);border-radius:3px;overflow:hidden;margin:14px 0}
.bz-timer i{display:block;height:100%;background:var(--sodium);width:100%}
.bz-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:12px}
.bz-a{--c:var(--s1);display:flex;align-items:center;gap:14px;min-height:84px;border:0;border-radius:14px;padding:14px 18px;cursor:pointer;background:var(--c);color:#FFFFFF;text-align:left;font-size:16px;font-weight:500;line-height:1.35;box-shadow:inset 0 -5px 0 rgba(0,0,0,.2);transition:transform .1s,opacity .2s,filter .2s}
:root[data-theme="dark"] .bz-a{color:#0B0C0E}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .bz-a{color:#0B0C0E}}
.bz-a:hover:not(:disabled){transform:translateY(-2px)} .bz-a:active:not(:disabled){transform:translateY(1px);box-shadow:inset 0 -2px 0 rgba(0,0,0,.2)}
.bz-a.c1{--c:var(--s2)} .bz-a.c2{--c:var(--s3)} .bz-a.c3{--c:var(--s4)}
.bz-l{flex:none;width:34px;height:34px;border-radius:8px;background:rgba(255,255,255,.22);display:grid;place-items:center;font-family:var(--f-mono);font-weight:600;font-size:16px}
.bz-a:disabled{cursor:default}
.bz-a.dim{opacity:.35;filter:saturate(.4)}
.bz-a.right{outline:4px solid var(--ok);outline-offset:3px}
.bz-a.wrong{outline:4px solid var(--sodium);outline-offset:3px;opacity:.75}
.bz-a.picked{outline:4px solid var(--ink);outline-offset:3px}
#bzFb{margin-top:14px}
.bz-final{font-size:44px!important;color:var(--accent);font-family:var(--f-mono);font-weight:500}
.lv-lobby{background:var(--surface);border-radius:16px;box-shadow:0 0 0 1px var(--hair);padding:28px 20px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px}
.lv-code{font-family:var(--f-mono);font-size:clamp(44px,10vw,72px);font-weight:500;letter-spacing:.18em;color:var(--accent)}
.lv-players{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;min-height:36px}
.lv-p{background:var(--accent-soft);color:var(--accent);border-radius:999px;padding:6px 14px;font-weight:600;animation:pop .3s}
@keyframes pop{from{transform:scale(.6);opacity:0}}
.lv-join{max-width:360px;margin:0 auto;background:var(--surface);border-radius:16px;box-shadow:0 0 0 1px var(--hair);padding:24px;display:flex;flex-direction:column;gap:8px}
.lv-join input{padding:12px;font-size:18px;border:0;box-shadow:0 0 0 1px var(--line);border-radius:10px;background:var(--bg);color:var(--ink);margin-bottom:8px}
.lv-bars{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;align-items:end;height:180px;margin:16px 0}
.lv-bar{--c:var(--s1);display:flex;flex-direction:column-reverse;align-items:center;gap:6px;height:100%}
.lv-bar.c1{--c:var(--s2)} .lv-bar.c2{--c:var(--s3)} .lv-bar.c3{--c:var(--s4)}
.lv-bar .bz-l{background:var(--c);color:#fff}
.lv-fill{width:100%;height:calc(var(--h)*120px + 6px);background:var(--c);border-radius:8px 8px 0 0}
.lv-bar.dim{opacity:.4} .lv-bar b{font-family:var(--f-mono)}
.lv-board{display:flex;flex-direction:column;gap:6px;margin:14px auto;max-width:520px}
.lv-board div{display:flex;align-items:center;gap:12px;background:var(--surface);box-shadow:0 0 0 1px var(--hair);border-radius:10px;padding:10px 14px;font-weight:500}
.lv-board b{margin-left:auto;font-family:var(--f-mono)}
.rk{font-family:var(--f-mono);color:var(--muted);width:20px}
.lv-result{text-align:center;padding:30px 20px;border-radius:16px;color:#fff;background:#17845A}
.lv-result.bad{background:#B4530E}
.lv-result h3{font-size:28px;color:#fff}
.lv-pts{font-family:var(--f-mono);font-size:40px;font-weight:500}
.lv-result p{margin:4px 0 0}
.podium{display:flex;justify-content:center;align-items:flex-end;gap:10px;margin:20px 0}
.pd{display:flex;flex-direction:column;align-items:center;gap:4px;width:min(30%,150px);min-width:0}
.pd-n{font-weight:700;text-align:center;overflow-wrap:anywhere}
.pd-s{font-family:var(--f-mono);font-size:13px;color:var(--muted)}
.pd-b{width:100%;display:grid;place-items:center;font-family:var(--f-mono);font-weight:600;font-size:28px;color:#fff;border-radius:10px 10px 0 0;background:var(--s1)}
.pd.p1 .pd-b{height:150px;background:#E8A33D;color:#15171A} .pd.p2 .pd-b{height:110px;background:#2643E8} .pd.p3 .pd-b{height:80px;background:#0E8FA3}
.confetti{position:fixed;inset:0;pointer-events:none;z-index:30;overflow:hidden}
.confetti i{position:absolute;top:-12px;width:8px;height:14px;border-radius:2px;animation:fall 2.2s ease-in forwards}
@keyframes fall{to{transform:translate(var(--dx),105vh) rotate(var(--r))}}

/* ---------- Progress ---------- */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));margin-top:36px;border-radius:16px;background:var(--surface);box-shadow:0 0 0 1px var(--hair);overflow:hidden}
.kpi{padding:18px 20px;box-shadow:inset -1px 0 0 var(--hair),inset 0 -1px 0 var(--hair)}
.kpi .k{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.kpi .k i{width:8px;height:8px;border-radius:50%}
.kpi b{display:block;margin-top:8px;font-family:var(--f-mono);font-size:32px;font-weight:500;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.kpi span.s{font-size:12.5px;color:var(--muted)}
.panel{background:var(--surface);border-radius:16px;box-shadow:0 0 0 1px var(--hair);padding:22px}
.panel h2{font-size:19px;letter-spacing:-.02em;margin-bottom:6px}
.panel > p.sub{margin:0 0 14px;font-size:13.5px;color:var(--muted)}
.map{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2px 36px;margin-top:14px}
@media (max-width:820px){.map{grid-template-columns:minmax(0,1fr)}}
.map-row{display:flex;align-items:center;gap:12px;padding:5px 0;min-width:0}
.map-row .mn{width:22px;font-family:var(--f-mono);font-size:12px;color:var(--muted);flex:none}
.map-row .mt{flex:1 1 140px;min-width:0;font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cells{display:flex;gap:3px;flex-wrap:wrap;justify-content:flex-end;max-width:60%}
.cell{width:16px;height:16px;border-radius:4px;border:0;padding:0;background:var(--none);cursor:pointer}
.cell.mastered{background:var(--accent)} .cell.shaky{background:var(--sodium)} .cell.learning{background:color-mix(in srgb,var(--accent) 38%,var(--surface))}
.cols{display:flex;flex-wrap:wrap;gap:16px;margin-top:16px}
.cols > *{flex:1 1 380px;min-width:0}
.mist{display:flex;align-items:center;gap:12px;padding:12px 0;border-top:1px solid var(--hair)}
.mist .tx{flex:1;min-width:0}
.mist .tx b{display:block;font-weight:500;font-size:14.5px}
.mist .tx span{font-size:12.5px;color:var(--muted)}
.boxes{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;align-items:end;height:150px;margin-top:8px}
.boxes .bx{display:flex;flex-direction:column;justify-content:flex-end;gap:6px;height:100%;text-align:center}
.boxes .bx b{font-family:var(--f-mono);font-size:13px;font-weight:500}
.boxes .bx i{display:block;border-radius:6px 6px 3px 3px;background:color-mix(in srgb,var(--accent) 38%,var(--surface));min-height:3px}
.boxes .bx:first-child i{background:var(--ink)}
.boxlab{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin-top:8px;text-align:center;font-size:11.5px;color:var(--muted)}
.boxlab b{display:block;font-family:var(--f-mono);font-weight:500;color:var(--ink2)}
.sess{display:flex;flex-wrap:wrap;align-items:center;gap:6px 16px;padding:14px 0;border-top:1px solid var(--hair)}
.sess .d{width:58px;font-family:var(--f-mono);font-size:13px;color:var(--muted)}
.sess .tx{flex:1 1 260px;min-width:0}
.sess .tx b{display:block;font-weight:500}
.sess .tx span{font-size:13px;color:var(--muted)}
.sess .sc{font-family:var(--f-mono);font-weight:500;min-width:60px;text-align:right}
.tbl-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th{text-align:left;font-weight:500;color:var(--muted);font-size:12.5px;padding:6px 8px;border-bottom:1px solid var(--line)}
td{padding:9px 8px;border-bottom:1px solid var(--hair);vertical-align:top}
td.n{font-family:var(--f-mono);font-variant-numeric:tabular-nums;white-space:nowrap}
td a{color:var(--ink);font-weight:500}
ul.plain{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
ul.plain li{font-size:14px}

/* ---------- overlays: command bar + settings ---------- */
.scrim{position:fixed;inset:0;z-index:40;background:rgba(10,11,14,.42);display:flex;align-items:flex-start;justify-content:center;padding:calc(env(safe-area-inset-top,0px) + 9vh) max(16px,env(safe-area-inset-right,0px)) 16px max(16px,env(safe-area-inset-left,0px));overflow:auto}
.cmd{width:min(680px,100%);background:var(--surface);border-radius:18px;box-shadow:0 0 0 1px var(--line),0 40px 80px -30px rgba(0,0,0,.55);overflow:hidden;display:flex;flex-direction:column;max-height:76vh}
.cmd-in{display:flex;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px solid var(--hair)}
.cmd-in input{flex:1;min-width:0;border:0;outline:none;background:transparent;font-size:18px}
.cmd-list{overflow:auto;padding:6px}
.cmd-g{padding:10px 12px 4px;font-size:11.5px;font-weight:500;color:var(--muted)}
.cmd-it{display:flex;align-items:center;gap:12px;padding:9px 12px;border-radius:10px;cursor:pointer}
.cmd-it[aria-selected="true"]{background:var(--accent-soft);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 25%,transparent)}
.cmd-ic{flex:none;width:30px;height:30px;border-radius:8px;display:grid;place-items:center;font-family:var(--f-mono);font-size:11px;font-weight:500;background:var(--sunk);color:var(--ink)}
.cmd-ic.vis{background:#0E0F12;color:#8EA0FF}
.cmd-ic.ask{background:var(--ink);color:var(--bg)}
.cmd-ic.pr{background:var(--warn-soft);color:var(--warn)}
.cmd-tx{flex:1;min-width:0}
.cmd-tx b{display:block;font-weight:500;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cmd-tx span{display:block;font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cmd-foot{display:flex;flex-wrap:wrap;gap:16px;padding:10px 18px;border-top:1px solid var(--hair);font-size:12px;color:var(--muted)}
.cmd-foot span{display:inline-flex;align-items:center;gap:6px}
.sheet{width:min(720px,100%);background:var(--surface);border-radius:20px;box-shadow:0 0 0 1px var(--line),0 40px 80px -30px rgba(0,0,0,.55);padding:28px;display:flex;flex-direction:column;gap:24px}
.sheet h2{font-size:28px;letter-spacing:-.03em}
.sheet .sub{margin:8px 0 0;color:var(--muted)}
.sheet fieldset{border:0;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;min-width:0}
.sheet legend{font-weight:600;font-size:14px;margin-bottom:10px;padding:0}
.opts{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:8px}
.opt{position:relative;display:flex;flex-direction:column;gap:3px;padding:12px 14px;border-radius:12px;box-shadow:0 0 0 1px var(--line),0 2px 0 var(--hair);cursor:pointer;background:var(--surface)}
.opt input{position:absolute;opacity:0;pointer-events:none}
.opt b{font-weight:500;font-size:14px}
.opt span{font-size:12.5px;color:var(--muted)}
.opt:has(input:checked){box-shadow:0 0 0 2px var(--accent),0 2px 0 color-mix(in srgb,var(--accent) 30%,transparent);background:var(--accent-soft)}
.opt:has(input:focus-visible){outline:2px solid var(--accent);outline-offset:2px}
.sheet .foot{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}

footer{border-top:1px solid var(--hair);color:var(--muted);font-size:12.5px}
footer .wrap{padding-block:20px}
footer a{color:var(--muted)}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(24px + env(safe-area-inset-bottom,0px));background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;font-size:14px;z-index:50;max-width:calc(100% - 32px);box-shadow:0 12px 30px -12px rgba(0,0,0,.5)}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .tlayout{grid-template-columns:minmax(0,1fr);grid-template-rows:auto minmax(0,1fr)}
  .chat{border-left:0}
  .rail{grid-column:1 / -1;flex-direction:row;flex-wrap:wrap;align-items:center;gap:8px 18px;border-right:0;border-bottom:1px solid var(--hair);padding:12px 18px}
  .rail .hide-mid{display:none}
  .rail .finish{margin-top:0;flex-direction:row}
  .rail .group{flex-direction:row;flex-wrap:wrap;align-items:center}
  .rail .group .eyebrow{margin:0 4px 0 0}
}
@media (max-width:900px){
  .searchbtn{min-width:0} .searchbtn span,.searchbtn .kbd{display:none}
  .levelchip{display:none}
}
@media (max-width:820px){
  .tlayout{display:flex;flex-direction:column;height:auto;min-height:0}
  .chat{border-left:0;border-top:1px solid var(--hair)}
  .msgs{overflow:visible;min-height:240px}
}
@media (max-width:760px){
  .nav{position:fixed;left:0;right:0;bottom:0;z-index:9;margin:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--hair);padding:6px max(8px,env(safe-area-inset-right,0px)) calc(8px + env(safe-area-inset-bottom,0px)) max(8px,env(safe-area-inset-left,0px))}
  .nav a{flex-direction:column;gap:3px;font-size:11px;padding:6px 0;min-height:44px;justify-content:center}
  .nav a svg{display:block}
  .nav a[aria-current="page"]{background:transparent;color:var(--accent)}
  body{padding-bottom:72px}
  .bar{backdrop-filter:none;-webkit-backdrop-filter:none;background:var(--bg)}
  .glance{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:32px}
  .stat{padding:14px}
  .stat .v b{font-size:24px}
  .toast{bottom:calc(88px + env(safe-area-inset-bottom,0px))}
  .brand b{display:none}
  .pill span{display:none}
  main{padding-block:24px 40px}
  .ptable{gap:4px}
  .ptile{padding:5px 5px 6px;border-radius:8px;gap:3px}
  .p-name,.p-pct,.p-here{display:none}
  .p-sym{font-size:15px}
  .p-top{font-size:8px}
  .legend{padding:0 4px;font-size:11px;gap:6px 12px}
  .legend p{display:none}
  .ghosttile{display:none}
  .hero-tile{max-width:none}
  .ht-sym{font-size:72px}
  .secrow .svis{display:none}
  .sheet{padding:20px}
}
/* ===================== Day / Night: landscape backgrounds behind see-through panels =====================
   The page adds class "day" or "night" to <html>. The chosen landscape (beach, mountains, countryside or city)
   is drawn on the fixed #bg canvas at the end of the page, in the day or night version. */
:root.day:root{
  --bg:#F7F7F4; --surface:rgba(255,255,255,.50); --sunk:rgba(255,255,255,.40); --ink:#14171C; --ink2:#2A2F36; --muted:#4D5560; --faint:#5F6B7A;
  --line:rgba(20,23,28,.14); --hair:rgba(20,23,28,.08);
  --accent:#2643E8; --accent-soft:rgba(38,67,232,.12); --accent-ink:#FFFFFF; --flame:#D9631E; --sodium:#E8A33D;
  --ok:#13734E; --ok-soft:rgba(19,115,78,.13); --warn:#94500B; --warn-soft:rgba(232,163,61,.20); --learn:#2643E8; --learn-soft:rgba(38,67,232,.12); --none:rgba(20,23,28,.13);
  --stage:rgba(14,16,22,.82); --stage-ring:rgba(20,23,28,.10);
  --glass:blur(2px) saturate(1.1); --barbg:rgba(255,255,255,.46);
  color-scheme:light}
:root.night:root{
  --bg:#070A1A; --surface:rgba(18,24,52,.34); --sunk:rgba(255,255,255,.07); --ink:#F1F0EA; --ink2:#DCDCE4; --muted:#A9AEC2; --faint:#8188A0;
  --line:rgba(255,236,170,.20); --hair:rgba(255,236,170,.11);
  --accent:#8EA0FF; --accent-soft:rgba(142,160,255,.16); --accent-ink:#070A1A; --flame:#F08A4B; --sodium:#FFD24D;
  --ok:#5FD49B; --ok-soft:rgba(95,212,155,.16); --warn:#FFD24D; --warn-soft:rgba(255,210,77,.14); --learn:#8EA0FF; --learn-soft:rgba(142,160,255,.16); --none:rgba(255,255,255,.16);
  --s1:#8EA0FF; --s2:#F08A4B; --s3:#5FD49B; --s4:#C29BFF; --s5:#4FD1E0;
  --stage:rgba(5,8,20,.62); --stage-ring:rgba(255,236,170,.14);
  --lk-red:#FF7A6E; --lk-orange:#FF9F5C; --lk-yellow:#F2D04B; --lk-green:#5FD49B; --lk-cyan:#5FD3FF; --lk-blue:#8EA0FF; --lk-violet:#C29BFF; --lk-teal:#4FD1E0;
  --glass:blur(1.5px) saturate(1.1); --barbg:rgba(6,9,24,.55);
  color-scheme:dark}
#bg,#bgwind{position:fixed;inset:0;width:100vw;height:100vh;z-index:-1;pointer-events:none;display:block}
#bgwind{visibility:hidden}
/* a soft wash over the painted background so text stays easy to read */
#bgveil{position:fixed;inset:0;z-index:-1;pointer-events:none;transition:background-color .4s ease;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.6) 55%,rgba(0,0,0,.5) 100%);mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.6) 55%,rgba(0,0,0,.5) 100%)}
.day #bgveil{background-color:rgba(246,248,250,.46)}
.night #bgveil{background-color:rgba(6,9,30,.42)}
/* when the day/night loop crosses into night or day, the page colors fade over a few seconds instead of snapping */
.theme-fading #bgveil{transition:background-color 4s ease}
.theme-fading body, .theme-fading body *{transition:background-color 4s ease,color 4s ease,border-color 4s ease,box-shadow 4s ease,text-shadow 4s ease,fill 4s ease!important}
.day :is(.display,.lede,.eyebrow,.classpos,.course-head h2,.legend,.pr-title,.vnote){text-shadow:0 0 14px rgba(255,255,255,.85),0 0 3px rgba(255,255,255,.6)}
.night :is(.display,.lede,.eyebrow,.classpos,.course-head h2,.legend,.pr-title,.vnote){text-shadow:0 0 14px rgba(5,8,28,.9),0 0 3px rgba(5,8,28,.7)}
.day body{background:#BFDCEC} .night body{background:#060816}
/* ===== Calm palette (Oct 28, UX - Comfort Touches, Part 4): low saturation, warm off-whites by day,
   deep navy by night, sage accent that belongs in the forest scene, amber (never red) for mistakes. ===== */
:root.day:root{
  --bg:#F7F5F0; --surface:rgba(247,245,240,.56); --sunk:rgba(247,245,240,.42); --ink:#2A2D33; --ink2:#3A3E45; --muted:#565C64; --faint:#6A7078;
  --line:rgba(42,45,51,.14); --hair:rgba(42,45,51,.08);
  --accent:#4F7D67; --accent-soft:rgba(127,163,145,.20); --accent-ink:#FFFFFF;
  --ok:#3F7A52; --ok-soft:rgba(125,179,138,.20); --warn:#8E6420; --warn-soft:rgba(217,165,91,.22); --learn:#4F7D67; --learn-soft:rgba(127,163,145,.20);
  --sodium:#E8C77A; --barbg:rgba(247,245,240,.58);
}
:root.night:root{
  --bg:#121A2C; --surface:rgba(18,26,44,.42); --sunk:rgba(226,230,238,.06); --ink:#E2E6EE; --ink2:#D2D7E0; --muted:#A7AFBF; --faint:#8C93A6;
  --line:rgba(226,230,238,.16); --hair:rgba(226,230,238,.09);
  --accent:#9DBFAE; --accent-soft:rgba(127,163,145,.20); --accent-ink:#121A2C;
  --ok:#7DB38A; --ok-soft:rgba(125,179,138,.18); --warn:#D9A55B; --warn-soft:rgba(217,165,91,.16); --learn:#9DBFAE; --learn-soft:rgba(127,163,145,.20);
  --sodium:#E8C77A; --barbg:rgba(18,26,44,.60);
}
.day #bgveil{background-color:rgba(247,245,240,.40)}
.night #bgveil{background-color:rgba(18,26,44,.34)}
.day body{background:#C9D9D2} .night body{background:#121A2C}
/* Comforting type (Oct 28): soft book-like serif for headings, rounded humanist sans for reading.
   Labels no longer use a "computer" monospace; real code keeps monospace so it lines up. */
h1,h2,h3,.display{font-weight:500;letter-spacing:-.01em}
.eyebrow{letter-spacing:.06em}
pre,code,.msg pre,.msg code{font-family:ui-monospace,"Cascadia Mono",Consolas,monospace}
:is(.day,.night) body::before{background:transparent}
:is(.day,.night) .bar{background:var(--barbg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
:is(.day,.night) footer{background:var(--barbg);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
:is(.day,.night) :is(.card,.stat,.ptile,.panel,.kpis,.pr-empty,.mode-tile,.done-card,.ln-card,.choice,.mt-start,.mt-tile,.bz-q,.lv-lobby,.lv-join,.lv-board div,.start,.composer .box,.btn,.pill,.searchbtn,.levelchip,.dnbtn,.opt,.msg.student,.seg){backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass)}
:is(.day,.night) :is(.rail,.chat){background:var(--surface);backdrop-filter:var(--glass);-webkit-backdrop-filter:var(--glass)}
:is(.day,.night) .hero-tile{backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}
.day .stage{background:rgba(14,16,22,.86);backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}
.night .stage{background:rgba(5,8,20,.62);backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}
.day .levelchip{background:var(--surface)}
.night :is(.btn.dark,.ptile.sel){background:#F6E7A8;color:#0B0E22}
.night .ptile.sel :is(.p-n,.p-name,.p-pct){color:#3A3A52}
.night .btn.primary{box-shadow:0 0 24px -6px rgba(142,160,255,.6)}
.day :is(.pop,.cmd,.sheet,.fc-face){background:rgba(255,255,255,.90);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.day .fc-back{background:rgba(246,246,242,.93)}
.night :is(.pop,.cmd,.sheet,.fc-face){background:rgba(12,16,38,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.night .fc-back{background:rgba(20,26,56,.88)}
.night .toast{background:#F6E7A8;color:#0B0E22}
.day :is(select,option){background-color:#FFFFFF;color:#14171C}
.night :is(select,option){background-color:#10152E;color:#F1F0EA}
.night .bz-a{color:#0B0C0E}
/* day / night button in the top bar */
.dnbtn{display:inline-grid;place-items:center;width:34px;height:34px;flex:none;border:0;border-radius:999px;background:var(--surface);box-shadow:0 0 0 1px var(--line);color:var(--ink2);cursor:pointer;transition:transform .12s var(--ease)}
.dnbtn:active{transform:scale(.94)} .dnbtn svg{width:17px;height:17px}
/* background picker in Settings */
.scenes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.scenes button{border:0;background:none;padding:0;cursor:pointer;display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:500;color:var(--muted);text-align:center}
.scenes canvas{width:100%;aspect-ratio:5/3;border-radius:10px;display:block;box-shadow:0 0 0 1px var(--line);transition:box-shadow .15s ease,transform .15s var(--ease)}
.scenes button:hover canvas{transform:translateY(-1px)}
.scenes button[aria-pressed="true"]{color:var(--ink)}
.scenes button[aria-pressed="true"] canvas{box-shadow:0 0 0 2px var(--accent)}
@media (max-width:760px){
  .day .nav{background:rgba(255,255,255,.66)} .night .nav{background:rgba(6,9,24,.62)}
  .day .bar{background:rgba(255,255,255,.74);backdrop-filter:none;-webkit-backdrop-filter:none}
  .night .bar{background:rgba(6,9,24,.72);backdrop-filter:none;-webkit-backdrop-filter:none}
  .scenes{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ===================== Smoky glass: one constant look for the front of the page =====================
   The cards, bars and buttons always use the same deep blue-violet smoky glass, day and night, so only the
   scenery behind them changes. A soft sheen on the glass follows the sun by day and the moon by night
   (its position, color and strength are set by the page as --lx, --ly, --lc, --la). */
:root.glass:root{
  --surface:rgba(20,24,56,.50); --sunk:rgba(255,255,255,.08); --barbg:rgba(14,17,44,.52);
  --stage:rgba(8,10,28,.70); --glass:blur(9px) saturate(1.25);
  --lx:80vw; --ly:-10vh; --lc:255,238,200; --la:0;
  --lang:225deg; --rx:-1px; --ry:1px;
  --gloss:linear-gradient(var(--lang),rgba(var(--lc),calc(var(--la)*.85)) 0%,rgba(var(--lc),calc(var(--la)*.25)) 18%,rgba(var(--lc),0) 42%);
  --sheen:radial-gradient(circle 60vmax at var(--lx) var(--ly),rgba(var(--lc),var(--la)) 0%,rgba(var(--lc),calc(var(--la)*.5)) 30%,rgba(var(--lc),0) 72%);
  --sheen-soft:radial-gradient(circle 60vmax at var(--lx) var(--ly),rgba(var(--lc),calc(var(--la)*.45)) 0%,rgba(var(--lc),0) 60%);
  color-scheme:dark}
.glass #bgveil{background-color:rgba(8,10,34,.14)}
.glass body{background:#0B0F2A}
.glass :is(.card,.stat,.ptile,.panel,.kpis,.pr-empty,.mode-tile,.done-card,.ln-card,.choice,.mt-start,.mt-tile,.bz-q,.lv-lobby,.lv-join,.start,.composer .box,.btn:not(.primary):not(.dark),.pill,.searchbtn,.levelchip,.opt,.msg.student,.seg,.rail,.chat,.pop,.cmd,.sheet,.hero-tile,.notice,.toastbox){
  background-image:var(--gloss),var(--sheen);background-attachment:scroll,fixed}
.glass :is(.bar,footer){background-image:var(--sheen-soft);background-attachment:fixed}
.glass :is(.card,.stat,.panel,.kpis,.mode-tile,.done-card,.ln-card,.mt-tile,.bz-q,.pop,.cmd,.sheet,.hero-tile){
  box-shadow:0 0 0 1px var(--hair),inset var(--rx) var(--ry) 0 rgba(var(--lc),calc(var(--la)*1.6)),inset 0 1px 0 rgba(255,255,255,.06),0 10px 30px -18px rgba(4,6,20,.6)}
.glass .bar{background-color:var(--barbg);backdrop-filter:blur(14px) saturate(1.25);-webkit-backdrop-filter:blur(14px) saturate(1.25)}
/* phones: a blurred header traps the fixed tab bar inside it (it showed at the top); no blur there */
@media (max-width:760px){.glass .bar,:is(.day,.night) .bar,.bar{backdrop-filter:none!important;-webkit-backdrop-filter:none!important}}
.glass .stage{background:var(--stage);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.glass :is(.display,.lede,.eyebrow,.classpos,.course-head h2,.legend,.pr-title,.vnote){text-shadow:0 0 16px rgba(5,8,28,.85),0 0 4px rgba(5,8,28,.65)}
/* Wingman: units as simple cards in a flowing grid (not a periodic table) */
.ptable{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
.ptable .legend{grid-column:1 / -1;grid-row:auto;padding:6px 2px 0}