/* ==========================================================================
   r5.css — Round 5 OPTIONS (30 Sep 2026). Look-only pieces added on top of slim.css.
   Colours through tokens.css; the only new colour is the teacher's red ink.
   ========================================================================== */
@font-face{font-family:"Patrick Hand";font-display:swap;src:url(assets/fonts/patrick-hand-1.woff2) format("woff2");
  unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}
@font-face{font-family:"Patrick Hand";font-display:swap;src:url(assets/fonts/patrick-hand-2.woff2) format("woff2");
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:"Patrick Hand";font-display:swap;src:url(assets/fonts/patrick-hand-3.woff2) format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
:root{--ink-red:#C62828;--ink-blue:#1F3A93;--paper:#FFFDF6;--paper-line:#DCE6F2;--hand:"Patrick Hand","Segoe Print",cursive}
[hidden]{display:none!important}

/* ---- option switcher on each topic page ---- */
.optbar{position:sticky;top:44px;z-index:30;display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:10px 12px;margin:-4px 0 16px;
  background:var(--surface);border:var(--card-border);border-radius:14px;box-shadow:var(--shadow)}
.optbar .lbl{font-size:12px;font-weight:600;letter-spacing:var(--label-ls);text-transform:uppercase;color:var(--muted);margin-right:4px}
.optbar button{min-height:40px;padding:0 14px;border-radius:20px;border:var(--ghost-border);background:var(--surface);color:var(--sub);font-family:inherit;font-size:13.5px;font-weight:500;cursor:pointer}
.optbar button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.optbar .rec{font-size:11px;font-weight:600;margin-left:6px;padding:2px 7px;border-radius:9px;background:var(--alt-soft);color:var(--alt-ink)}
.optbar button[aria-pressed="true"] .rec{background:rgba(255,255,255,.22);color:var(--on-accent)}
.optinfo{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px 18px;padding:14px 16px;margin-bottom:16px;border-radius:12px;background:var(--accent-soft);color:var(--ink);font-size:13.5px}
.optinfo h2{grid-column:1/-1;font-size:16px}
.optinfo b{display:block;font-size:11.5px;letter-spacing:var(--label-ls);text-transform:uppercase;color:var(--accent-ink);margin-bottom:2px}
.optinfo ul{margin:0;padding-left:18px}
.optinfo .risk{color:var(--warn)}
.illus{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--warn);background:var(--warn-soft);border-radius:10px;padding:3px 10px}

/* ---- hub ---- */
.hubgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:14px}
.hubcard{display:grid;gap:8px;padding:16px;border-radius:var(--radius);background:var(--surface);border:var(--card-border);box-shadow:var(--shadow);color:inherit;text-decoration:none}
.hubcard:hover{box-shadow:var(--shadow-pop)}
.hubcard h2{font-size:16.5px;display:flex;gap:10px;align-items:center}
.hubcard .n{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent-ink);font-size:14px;flex:none}
.hubcard p{color:var(--sub);font-size:13.5px}
.hubcard .opts5{display:flex;flex-wrap:wrap;gap:6px}
.hubcard .opts5 span{font-size:12px;padding:3px 9px;border-radius:10px;background:var(--neutral-soft);color:var(--sub)}
.hubcard .opts5 span.r{background:var(--alt-soft);color:var(--alt-ink)}

/* ---- composer ---- */
.cmp{border-radius:14px;background:var(--surface);border:var(--card-border);box-shadow:var(--shadow);margin-bottom:16px}
.cmp .closed{display:flex;align-items:center;gap:12px;padding:12px 14px;cursor:text}
.cmp .closed span.ph{flex:1;min-height:44px;display:flex;align-items:center;padding:0 18px;border-radius:22px;background:var(--accent-soft);color:var(--accent-ink);font-size:15px}
.cmp .open{padding:14px 16px}
.cmp .who{display:flex;align-items:center;gap:10px;font-weight:500;margin-bottom:10px}
.cmp .subj{width:100%;border:0;border-bottom:2px solid var(--accent);font:inherit;font-size:19px;padding:8px 2px;margin-bottom:8px;background:transparent;color:var(--ink);outline:none}
.cmp .banner-on{display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:10px;background:var(--warn-soft);color:var(--warn);font-weight:500;margin-bottom:8px}
.tbar{display:flex;align-items:center;gap:2px;flex-wrap:wrap;padding:6px 0;border-bottom:1px solid var(--line)}
.tbar button{min-width:36px;height:36px;border:0;border-radius:8px;background:none;color:var(--sub);font:inherit;font-size:15px;cursor:pointer;display:inline-grid;place-items:center}
.tbar button:hover,.tbar button[aria-pressed="true"]{background:var(--neutral-soft);color:var(--ink)}
.tbar .sep{width:1px;height:22px;background:var(--line);margin:0 4px}
.cmp .editor{min-height:90px;padding:12px 2px;outline:none;font-size:15px;line-height:1.55}
.cmp .editor:empty::before{content:attr(data-ph);color:var(--muted)}
.cmp .foot{display:flex;align-items:center;gap:4px;flex-wrap:wrap;padding-top:8px}
.cmp .foot .icon-btn{width:40px;height:40px}
.cmp .att-prev{display:flex;gap:8px;flex-wrap:wrap;padding:6px 0}
.cmp .att-prev figure{position:relative;margin:0;width:88px;height:66px;border-radius:8px;overflow:hidden;background:var(--neutral-soft);display:grid;place-items:center;font-size:11px;color:var(--sub);text-align:center}
.cmp .att-prev figure img,.cmp .att-prev figure video{width:100%;height:100%;object-fit:cover}
.cmp .att-prev figure button{position:absolute;right:3px;top:3px;width:22px;height:22px;border-radius:50%;border:0;background:rgba(0,0,0,.6);color:#fff;cursor:pointer;font-size:13px;line-height:1}
.emojis{display:flex;gap:4px;flex-wrap:wrap;padding:6px;border-radius:10px;background:var(--neutral-soft);margin-top:6px}
.emojis button{width:36px;height:36px;border:0;background:none;font-size:20px;cursor:pointer;border-radius:8px}
.emojis button:hover{background:var(--surface)}
dialog.r5dlg{border:0;border-radius:16px;padding:0;width:min(640px,calc(100vw - 24px));box-shadow:var(--shadow-pop)}
dialog.r5dlg::backdrop{background:var(--scrim)}
dialog.r5dlg .dhead{display:flex;align-items:center;justify-content:center;position:relative;padding:14px;border-bottom:1px solid var(--line);font-weight:600;font-size:17px}
dialog.r5dlg .dhead .icon-btn{position:absolute;right:8px;top:6px}
dialog.r5dlg .cmp{border:0;box-shadow:none;margin:0}
.drawer5{position:fixed;right:0;top:44px;bottom:0;width:min(460px,100vw);background:var(--surface);box-shadow:var(--shadow-pop);z-index:900;overflow:auto;transform:translateX(105%);transition:transform .25s ease}
.drawer5.on{transform:none}
.drawer5 .dhead{display:flex;align-items:center;gap:8px;padding:12px 14px;border-bottom:1px solid var(--line);font-weight:600}
.drawer5 .cmp{border:0;box-shadow:none;margin:0}

/* ---- posts with media ---- */
.p5{border-radius:14px;background:var(--surface);border:var(--card-border);box-shadow:var(--shadow);margin-bottom:16px;overflow:hidden}
.p5 .ph{display:flex;align-items:center;gap:10px;padding:14px 16px 8px}
.p5 .ph b{font-weight:500}.p5 .ph small{display:block;color:var(--muted);font-size:12.5px}
.p5 .pt{padding:0 16px 10px;font-size:15px;line-height:1.5}
.p5 .pt h3{font-size:17px;margin-bottom:4px}
.p5 .ann{display:flex;align-items:center;gap:8px;padding:8px 16px;background:var(--warn-soft);color:var(--warn);font-weight:500;font-size:13.5px}
.p5 .acts{display:flex;align-items:center;gap:4px;flex-wrap:wrap;padding:8px 10px;border-top:1px solid var(--line)}
.p5 .acts .react{min-height:38px}
.p5 .sum{display:flex;justify-content:space-between;padding:8px 16px;color:var(--muted);font-size:13px}
.pgrid{display:grid;gap:3px;background:var(--surface)}
.pgrid img{width:100%;height:100%;object-fit:cover;display:block;cursor:zoom-in}
.pgrid .cell{position:relative;overflow:hidden;background:var(--neutral-soft);min-height:0}
.pgrid .more{position:absolute;inset:0;display:grid;place-items:center;background:rgba(0,0,0,.5);color:#fff;font-size:30px;font-weight:600;pointer-events:none}
.pgrid.n1{grid-template-columns:1fr;aspect-ratio:16/10}
.pgrid.n2{grid-template-columns:1fr 1fr;aspect-ratio:2/1}
.pgrid.n3{grid-template-columns:2fr 1fr;grid-template-rows:1fr 1fr;aspect-ratio:3/2}.pgrid.n3 .cell:first-child{grid-row:1/3}
.pgrid.n4{grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;aspect-ratio:1/1;max-height:560px}
.lbox{position:fixed;inset:0;z-index:100000;background:rgba(10,12,16,.92);display:grid;place-items:center}
.lbox img,.lbox .sld{max-width:92vw;max-height:84vh;border-radius:6px}
.lbox .sld{width:min(1000px,92vw)}
.lbox button{position:absolute;width:52px;height:52px;border-radius:50%;border:0;background:rgba(255,255,255,.14);color:#fff;font-size:26px;cursor:pointer}
.lbox .x{right:16px;top:16px}.lbox .pv{left:16px;top:50%}.lbox .nx{right:16px;top:50%}
.lbox .cnt{position:absolute;bottom:18px;left:50%;translate:-50% 0;color:#fff;font-size:14px}
/* carousel */
.car5{position:relative;background:var(--neutral-soft)}
.car5 .trk{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none}
.car5 .trk::-webkit-scrollbar{display:none}
.car5 .trk > *{flex:0 0 100%;scroll-snap-align:start}
.car5 .trk img{width:100%;aspect-ratio:16/10;object-fit:cover;display:block}
.car5 .nav{position:absolute;top:50%;translate:0 -50%;width:40px;height:40px;border-radius:50%;border:0;background:var(--surface);box-shadow:var(--shadow-pop);cursor:pointer;display:grid;place-items:center;color:var(--ink)}
.car5 .nav.l{left:10px}.car5 .nav.r{right:10px}
.car5 .dots{position:absolute;bottom:10px;left:0;right:0;display:flex;justify-content:center;gap:6px}
.car5 .dots i{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.6);box-shadow:0 0 0 1px rgba(0,0,0,.15)}
.car5 .dots i.on{background:var(--accent)}
.car5 .pg{position:absolute;right:10px;top:10px;background:rgba(0,0,0,.6);color:#fff;border-radius:10px;padding:2px 9px;font-size:12px}
/* html slides (drawn, stand-in for the teacher's pptx) */
.sld{aspect-ratio:16/9;background:#fff;color:#1F2328;display:grid;align-content:center;gap:10px;padding:6% 8%;position:relative;overflow:hidden;font-family:var(--body)}
.sld::before{content:"";position:absolute;left:0;top:0;bottom:0;width:10px;background:var(--accent)}
.sld h4{font-size:clamp(18px,3vw,34px);font-weight:600;line-height:1.15}
.sld p,.sld li{font-size:clamp(12px,1.7vw,19px);color:#474D55}
.sld ul{margin:0;padding-left:1.2em;display:grid;gap:4px}
.sld .tag{position:absolute;right:12px;bottom:10px;font-size:11px;color:#6A717A}
.sld.dark{background:#1558B0;color:#fff}.sld.dark p,.sld.dark li{color:#E6F0FD}.sld.dark::before{background:#fff}
.sld.alt::before{background:var(--alt-ink)}
.filebar{display:flex;align-items:center;gap:10px;padding:10px 16px;border-top:1px solid var(--line);font-size:13.5px}
.filebar small{color:var(--muted)}
.bigview{border-top:1px solid var(--line);background:var(--neutral-soft);padding:12px}
.bigview .frame{border-radius:8px;overflow:hidden;box-shadow:var(--shadow);background:#fff}
.bigview .vbar{display:flex;align-items:center;gap:8px;padding:8px 2px 0;font-size:13px;color:var(--sub)}
/* video */
.vid5{position:relative;background:#000}
.vid5 video{width:100%;display:block;max-height:520px;background:#000}
.vid5 .badge{position:absolute;left:12px;top:12px;background:rgba(0,0,0,.6);color:#fff;border-radius:10px;padding:3px 10px;font-size:12px;pointer-events:none}
.vid5 .bigplay{position:absolute;inset:0;margin:auto;width:76px;height:76px;border-radius:50%;border:0;background:rgba(0,0,0,.55);color:#fff;cursor:pointer;display:grid;place-items:center}
.vid5 .bigplay svg{width:40px;height:40px}
.vid5 .snd{position:absolute;right:12px;bottom:12px;min-height:36px;padding:0 12px;border-radius:18px;border:0;background:rgba(0,0,0,.6);color:#fff;font:inherit;font-size:12.5px;cursor:pointer}
.chipsrow{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}

/* ---- attendance ---- */
.lessons{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;margin-bottom:12px}
.lessons button{flex:none;min-height:56px;padding:6px 14px;border-radius:12px;border:var(--ghost-border);background:var(--surface);font:inherit;font-size:13px;color:var(--sub);cursor:pointer;text-align:left}
.lessons button b{display:block;color:var(--ink);font-weight:500}
.lessons button[aria-pressed="true"]{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-ink)}
.arow{display:flex;align-items:center;gap:12px;padding:10px 4px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.arow:last-child{border:0}
.arow .nm{flex:1;min-width:160px}.arow .nm small{display:block;color:var(--muted);font-size:12.5px}
.seg5{display:inline-flex;border:var(--ghost-border);border-radius:20px;overflow:hidden}
.seg5 button{min-height:40px;min-width:74px;padding:0 12px;border:0;background:var(--surface);font:inherit;font-size:13px;color:var(--sub);cursor:pointer}
.seg5 button+button{border-left:1px solid var(--line-strong)}
.seg5 button[aria-pressed="true"][data-st="P"]{background:var(--alt-soft);color:var(--alt-ink);font-weight:600}
.seg5 button[aria-pressed="true"][data-st="L"]{background:#FFF4D6;color:#8A5A00;font-weight:600}
.seg5 button[aria-pressed="true"][data-st="A"]{background:var(--warn-soft);color:var(--warn);font-weight:600}
.seg5 button[aria-pressed="true"][data-st="E"]{background:var(--neutral-soft);color:var(--ink);font-weight:600}
.agrid{border-collapse:separate;border-spacing:0;width:100%;font-size:13px}
.agrid th,.agrid td{padding:6px;border-bottom:1px solid var(--line);text-align:center;white-space:nowrap}
.agrid th:first-child,.agrid td:first-child{text-align:left;position:sticky;left:0;background:var(--surface)}
.agrid td button{width:34px;height:34px;border-radius:8px;border:0;font:inherit;font-weight:600;cursor:pointer}
.agrid [data-v="P"]{background:var(--alt-soft);color:var(--alt-ink)}
.agrid [data-v="L"]{background:#FFF4D6;color:#8A5A00}
.agrid [data-v="A"]{background:var(--warn-soft);color:var(--warn)}
.agrid [data-v="E"]{background:var(--neutral-soft);color:var(--sub)}
.agrid [data-v=""]{background:none;border:1px dashed var(--line-strong)!important;color:var(--muted)}
.agrid .pct{font-weight:600}
.legend5{display:flex;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--sub);margin:8px 0}
.legend5 i{display:inline-block;width:14px;height:14px;border-radius:4px;vertical-align:-2px;margin-right:4px}

/* ---- forms list ---- */
.frow{display:flex;align-items:center;gap:12px;padding:12px 4px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.frow .fic{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;background:#EFE9F8;flex:none}
.frow .fic img{width:24px;height:24px}
.frow .t{flex:1;min-width:180px}.frow .t small{display:block;color:var(--muted);font-size:12.5px}
.gform{background:#F0EBF8;border-radius:12px;padding:14px;display:grid;gap:10px}
.gform .top{background:#fff;border-radius:8px;border-top:10px solid #673AB7;padding:16px}
.gform .top h3{font-size:22px;font-weight:400}
.gform .q{background:#fff;border-radius:8px;padding:14px 16px;font-size:14px}
.gform .q b{display:block;font-weight:500;margin-bottom:6px}
.gform .q .a{border-bottom:1px solid #DADCE0;padding:4px 0;color:#202124}
.panel5{position:fixed;right:0;top:44px;bottom:0;width:min(560px,100vw);background:var(--surface);box-shadow:var(--shadow-pop);z-index:900;display:flex;flex-direction:column;transform:translateX(105%);transition:transform .25s}
.panel5.on{transform:none}
.panel5 .dhead{display:flex;align-items:center;gap:8px;padding:10px 14px;border-bottom:1px solid var(--line);font-weight:600}
.panel5 .body{flex:1;overflow:auto;padding:14px}
.panel5 iframe{width:100%;height:100%;border:0;min-height:70vh;background:#F0EBF8}

/* ---- homework detail ---- */
.hwgrid{border-collapse:separate;border-spacing:0;font-size:13px;width:100%}
.hwgrid th,.hwgrid td{padding:6px 5px;border-bottom:1px solid var(--line);text-align:center;white-space:nowrap}
.hwgrid th{font-weight:500;color:var(--sub);font-size:12px}
.hwgrid td:first-child,.hwgrid th:first-child{text-align:left;position:sticky;left:0;background:var(--surface);z-index:1}
.hwgrid td button{width:32px;height:32px;border-radius:8px;border:0;font:inherit;font-weight:700;cursor:pointer}
.hwgrid .ok{background:var(--alt-soft);color:var(--alt-ink)}
.hwgrid .no{background:var(--warn-soft);color:var(--warn)}
.hwgrid .chk{background:#FFF4D6;color:#8A5A00}
.hwgrid .ai{background:var(--accent-soft);color:var(--accent-ink);width:auto!important;padding:0 8px}
.hwgrid .none{color:var(--muted)}
.hwgrid tr.sel td{background:var(--accent-soft)}
.hwgrid .tot{font-weight:600}
.split5{display:grid;grid-template-columns:260px minmax(0,1fr);gap:16px;align-items:start}
.slist{display:grid;gap:4px}
.slist button{display:flex;align-items:center;gap:10px;min-height:52px;padding:6px 10px;border-radius:10px;border:0;background:none;font:inherit;text-align:left;cursor:pointer;color:var(--ink)}
.slist button:hover{background:var(--neutral-soft)}
.slist button[aria-pressed="true"]{background:var(--accent-soft)}
.slist small{display:block;color:var(--muted);font-size:12px}
.slist .sc{margin-left:auto;font-weight:600;font-size:13px}
/* the paper */
.paper{position:relative;background:var(--paper);border-radius:6px;box-shadow:0 1px 2px rgba(0,0,0,.08),0 6px 20px rgba(0,0,0,.08);padding:26px 26px 30px 64px;
  background-image:linear-gradient(90deg,transparent 46px,rgba(198,40,40,.35) 46px,rgba(198,40,40,.35) 48px,transparent 48px),repeating-linear-gradient(var(--paper) 0 31px,var(--paper-line) 31px 32px);font-size:16px;line-height:32px}
.paper h3{font-size:18px;line-height:32px;font-weight:600}
.paper .meta{color:var(--sub);font-size:13px}
.paper .qq{position:relative;margin-top:4px}
.paper .qn{position:absolute;left:-44px;width:32px;text-align:right;color:var(--muted);font-size:14px}
.paper .popt{display:inline-block;margin-right:18px;position:relative;padding:0 4px}
.paper .stu{font-family:var(--hand);color:var(--ink-blue);font-size:21px;position:relative;padding:0 3px}
.paper .gap{display:inline-block;min-width:110px;border-bottom:1px solid #9AA3AD;text-align:center;line-height:26px}
.ink{font-family:var(--hand);color:var(--ink-red);font-size:20px;line-height:1.15}
.ink-note{position:absolute;font-family:var(--hand);color:var(--ink-red);font-size:19px;line-height:1.1;white-space:nowrap;transform:rotate(-3deg)}
.ink-score{position:absolute;right:22px;top:14px;font-family:var(--hand);color:var(--ink-red);font-size:40px;line-height:1;transform:rotate(-8deg);text-align:center}
.ink-score small{display:block;font-size:17px}
.ink-score::after{content:"";position:absolute;inset:-12px -16px;border:3px solid var(--ink-red);border-radius:50% 45% 52% 48%;transform:rotate(6deg)}
.circ{position:absolute;inset:-6px -8px;pointer-events:none;overflow:visible}
.circ path{fill:none;stroke:var(--ink-red);stroke-width:2.4;stroke-linecap:round}
.tickm,.crossm{position:absolute;left:-70px;top:0;width:28px;height:28px;overflow:visible}
.tickm path,.crossm path{fill:none;stroke:var(--ink-red);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}
.strike{text-decoration:line-through;text-decoration-color:var(--ink-red);text-decoration-thickness:2px}
.paper.ink-off .ink,.paper.ink-off .ink-note,.paper.ink-off .ink-score,.paper.ink-off .circ,.paper.ink-off .tickm,.paper.ink-off .crossm{visibility:hidden}
.paper.ink-off .strike{text-decoration:none}
/* digital marks */
.dpaper{background:var(--surface);border:var(--card-border);border-radius:12px;padding:18px 20px;display:grid;gap:12px}
.dq{display:grid;grid-template-columns:28px minmax(0,1fr) auto;gap:10px;align-items:start;padding-bottom:12px;border-bottom:1px solid var(--line)}
.dq:last-child{border:0}
.dq .mk{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:14px}
.dq .mk.ok{background:var(--alt-soft);color:var(--alt-ink)}.dq .mk.no{background:var(--warn-soft);color:var(--warn)}.dq .mk.chk{background:#FFF4D6;color:#8A5A00}
.hl-ok{background:var(--alt-soft);color:var(--alt-ink);border-radius:4px;padding:0 4px}
.hl-no{background:var(--warn-soft);color:var(--warn);border-radius:4px;padding:0 4px;text-decoration:line-through}
.mcom{font-size:13px;background:#FFF8E1;border-left:3px solid #F2B600;padding:6px 10px;border-radius:6px;max-width:260px}
.mcom b{display:block;font-size:12px}
.scorein{width:64px;min-height:40px;text-align:center;font:inherit;font-size:15px;border:var(--ghost-border);border-radius:8px}
.photo-paper{position:relative;border-radius:8px;overflow:hidden;background:#EDE7DA;padding:18px;box-shadow:inset 0 0 60px rgba(0,0,0,.18)}
.photo-paper .paper{transform:rotate(-1.2deg);box-shadow:0 8px 30px rgba(0,0,0,.25)}
.sendbox{display:grid;gap:10px;padding:14px;border-radius:12px;background:var(--surface);border:var(--card-border)}
.msgprev{border-radius:12px;background:var(--neutral-soft);padding:12px;font-size:13.5px;white-space:pre-line}
.msgprev.zalo{background:#E5F1FF}
.state5{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;padding:3px 10px;border-radius:10px}
.state5.draft{background:var(--neutral-soft);color:var(--sub)}.state5.appr{background:var(--alt-soft);color:var(--alt-ink)}.state5.sent{background:var(--accent-soft);color:var(--accent-ink)}.state5.sched{background:#FFF4D6;color:#8A5A00}

/* ---- materials ---- */
.mgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.mcard{border-radius:12px;overflow:hidden;background:var(--surface);border:var(--card-border);box-shadow:var(--shadow);cursor:pointer;text-align:left;padding:0;font:inherit;color:inherit}
.mcard:hover{box-shadow:var(--shadow-pop)}
.mcard .th{aspect-ratio:16/10;overflow:hidden;background:var(--neutral-soft);position:relative}
.mcard .th > *{width:100%;height:100%;object-fit:cover}
.mcard .th .sld{padding:8% 9%;gap:4px}.mcard .th .sld h4{font-size:15px}.mcard .th .sld p,.mcard .th .sld li{font-size:10px}
.mcard .th .kind{position:absolute;left:8px;bottom:8px;background:rgba(0,0,0,.65);color:#fff;font-size:11px;border-radius:8px;padding:2px 8px;width:auto;height:auto}
.mcard .mb{padding:10px 12px}.mcard .mb b{font-weight:500;display:block;font-size:14px}.mcard .mb small{color:var(--muted);font-size:12px}
.files5{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:16px;align-items:start}
.flist{border-radius:12px;background:var(--surface);border:var(--card-border);overflow:hidden}
.flist button{display:flex;align-items:center;gap:12px;width:100%;min-height:56px;padding:8px 14px;border:0;border-bottom:1px solid var(--line);background:none;font:inherit;text-align:left;cursor:pointer;color:var(--ink)}
.flist button[aria-pressed="true"]{background:var(--accent-soft)}
.flist small{display:block;color:var(--muted);font-size:12px}
.flist .fold{font-size:12px;font-weight:600;letter-spacing:var(--label-ls);text-transform:uppercase;color:var(--muted);padding:10px 14px 6px}
.viewer{border-radius:12px;background:var(--surface);border:var(--card-border);padding:12px;position:sticky;top:120px}
.docpage{background:#fff;border:1px solid var(--line);padding:24px;font-size:14px;line-height:1.6;min-height:300px}
.docpage h4{font-size:18px;margin-bottom:8px}

/* ---- AI studio ---- */
.nb{display:grid;grid-template-columns:260px minmax(0,1fr) 280px;gap:12px;min-height:640px}
.nb.two{grid-template-columns:minmax(0,1fr) 300px}
.nbp{background:var(--surface);border:var(--card-border);border-radius:16px;display:flex;flex-direction:column;min-height:0;overflow:hidden}
.nbp > h3{font-size:15px;font-weight:500;padding:12px 14px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:8px}
.nbp .pb{padding:12px;flex:1;overflow:auto;display:grid;gap:8px;align-content:start}
.src{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:10px;background:var(--neutral-soft);font-size:13px}
.src input{width:18px;height:18px}
.src small{display:block;color:var(--muted);font-size:11.5px}
.chat{flex:1;overflow:auto;padding:14px;display:grid;gap:10px;align-content:start}
.msg{max-width:88%;padding:10px 14px;border-radius:16px;font-size:14px;line-height:1.5}
.msg.me{justify-self:end;background:var(--accent);color:var(--on-accent);border-bottom-right-radius:4px}
.msg.ai{justify-self:start;background:var(--neutral-soft);border-bottom-left-radius:4px}
.msg.ai .qs{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.msg.ai .qs button{min-height:36px;padding:0 12px;border-radius:18px;border:var(--ghost-border);background:var(--surface);font:inherit;font-size:13px;cursor:pointer}
.msg.ai .cite{display:inline-block;font-size:11px;background:var(--accent-soft);color:var(--accent-ink);border-radius:8px;padding:0 6px;margin-left:4px}
.chatin{display:flex;gap:8px;padding:10px;border-top:1px solid var(--line)}
.chatin input{flex:1;min-height:46px;border-radius:23px;border:var(--ghost-border);padding:0 16px;font:inherit;font-size:15px}
.studio{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.studio button{display:flex;align-items:center;gap:8px;min-height:52px;padding:8px 10px;border-radius:12px;border:0;background:var(--neutral-soft);font:inherit;font-size:13px;text-align:left;cursor:pointer;color:var(--ink)}
.studio button:hover{background:var(--accent-soft);color:var(--accent-ink)}
.studio button .ico{flex:none;color:var(--accent-ink)}
.studio.big{grid-template-columns:repeat(auto-fill,minmax(170px,1fr))}
.studio.big button{min-height:84px;flex-direction:column;align-items:flex-start;justify-content:center;font-size:14px;background:var(--surface);border:var(--card-border)}
.outs{display:grid;gap:8px;margin-top:6px}
.outc{padding:10px;border-radius:12px;border:var(--card-border);font-size:13px;background:var(--surface)}
.outc b{display:flex;align-items:center;gap:6px;font-weight:500}
.outc small{color:var(--muted)}
.shimmer{height:12px;border-radius:6px;background:linear-gradient(90deg,var(--neutral-soft),var(--line),var(--neutral-soft));background-size:200% 100%;animation:sh 1.2s linear infinite;margin-top:6px}
@keyframes sh{to{background-position:-200% 0}}
@media (prefers-reduced-motion:reduce){.shimmer{animation:none}.drawer5,.panel5{transition:none}}
.flash{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px}
.flash button{aspect-ratio:3/2;border-radius:12px;border:var(--card-border);background:var(--surface);font:inherit;font-size:15px;cursor:pointer;perspective:600px}
.flash button.flip{background:var(--accent-soft);color:var(--accent-ink)}
.mind{width:100%;height:auto}
.mind text{font-family:var(--body);font-size:13px}
/* architecture flows */
.flow5{display:flex;align-items:stretch;gap:0;flex-wrap:wrap;margin:10px 0}
.flow5 .st{flex:1;min-width:140px;padding:12px;border-radius:12px;background:var(--surface);border:var(--card-border);font-size:13px}
.flow5 .st b{display:block;font-size:14px;font-weight:600;margin-bottom:4px}
.flow5 .st.ours{border-color:var(--accent);background:var(--accent-soft)}
.flow5 .st.ext{border-style:dashed}
.flow5 .st.bad{border-color:var(--warn);background:var(--warn-soft)}
.flow5 .ar{display:grid;place-items:center;width:34px;color:var(--muted);font-size:22px;flex:none}
.facts5{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-top:10px}
.facts5 div{padding:10px 12px;border-radius:10px;background:var(--neutral-soft);font-size:12.5px;color:var(--sub)}
.facts5 b{display:block;font-size:18px;color:var(--ink)}
/* drive picker look-alike */
.gpick{border-radius:10px;overflow:hidden;border:1px solid #DADCE0;background:#fff;font-family:"Segoe UI",sans-serif}
.gpick .gh{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid #DADCE0;font-size:16px}
.gpick .gt{display:flex;gap:18px;padding:0 16px;border-bottom:1px solid #DADCE0;font-size:13px}
.gpick .gt span{padding:10px 0}.gpick .gt span.on{border-bottom:3px solid #1A73E8;color:#1A73E8}
.gpick .gg{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px;padding:14px 16px}
.gpick .gf{border:1px solid #DADCE0;border-radius:8px;overflow:hidden;font-size:12px;cursor:pointer;background:#fff;padding:0;text-align:left;font-family:inherit}
.gpick .gf .gth{aspect-ratio:4/3;background:#F1F3F4;display:grid;place-items:center;overflow:hidden}
.gpick .gf .gth img{width:100%;height:100%;object-fit:cover}
.gpick .gf span{display:block;padding:6px 8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.gpick .gf[aria-pressed="true"]{outline:3px solid #1A73E8}
.gpick .gfoot{display:flex;justify-content:flex-end;gap:8px;padding:10px 16px;border-top:1px solid #DADCE0}
.gpick .gbtn{min-height:36px;padding:0 18px;border-radius:4px;border:0;background:#1A73E8;color:#fff;font:inherit;font-size:14px;cursor:pointer}
.gpick .gbtn.q{background:none;color:#1A73E8}

@media (max-width:900px){
  .nb,.nb.two{grid-template-columns:1fr}
  .split5,.files5{grid-template-columns:1fr}
  .viewer{position:static}
  .paper{padding:20px 14px 24px 50px;font-size:15px}
  .paper .popt{margin-right:8px}
  .ink-score{right:10px;top:8px;font-size:30px}
}
.paper.typed .stu{font-family:var(--body);font-size:16px;color:var(--ink-blue);font-weight:500}
.viewer,.files5 > *,.split5 > *{min-width:0}
@media (max-width:900px){.split5,.files5{grid-template-columns:minmax(0,1fr)}}
.p5,.cmp,[id^="feed"],#fA,#fB,#fC{max-width:680px}
.chipsrow{max-width:680px}
.sld h4{color:inherit}.sld.dark h4{color:#fff}
.tickm,.crossm{left:-60px}
@media (max-width:900px){.tickm,.crossm{left:-48px;width:22px;height:22px}}
.nbp .pb > *{min-width:0}
.src > span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
/* side-by-side comparison pages */
.cmpgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,440px),1fr));gap:16px;align-items:start}
.cmpcol{background:var(--surface);border:var(--card-border);border-radius:16px;box-shadow:var(--shadow);padding:16px;display:grid;gap:12px;min-width:0}
.cmphead{display:flex;gap:12px;align-items:flex-start}
.cmphead h2{font-size:17px}.cmphead .sub{font-size:13px}
.cmpk{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:var(--accent);color:var(--on-accent);font-weight:700;font-size:18px;flex:none}
.cmpsteps{margin:0;padding:10px 12px 10px 30px;background:var(--neutral-soft);border-radius:10px;font-size:13px;display:grid;gap:3px}
.cmpdemo{border:1px dashed var(--line-strong);border-radius:12px;padding:12px;min-width:0}
.cmpfoot{display:grid;gap:4px;font-size:13px}.cmpfoot .good{color:var(--alt-ink)}.cmpfoot .bad{color:var(--warn)}
.fcard{border:var(--card-border);border-radius:12px;padding:10px 12px;margin-top:8px;background:var(--surface)}
.fcard summary{display:flex;align-items:center;gap:10px;cursor:pointer;list-style:none}
.fcard summary::-webkit-details-marker{display:none}
.fcard summary .t{flex:1;min-width:0}.fcard summary small{display:block;color:var(--muted);font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fcard .fic{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:#EFE9F8;flex:none}
.mwk h3{font-size:14px;font-weight:600;color:var(--sub);margin:4px 0 8px}
.mwk + .mwk{margin-top:14px}
.wkrow{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
.hubcard .state5{justify-self:start}
.mcard .th .sld p{display:none}