/* Homepage: first-visit picker, the five sections (one sentence, change it, word order, tenses, next) and the parts. */
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--bar-h) + 12px)}
.display{font-size:clamp(30px,4.2vw,46px);line-height:1.08;font-weight:700;letter-spacing:-.015em;max-width:26ch;margin:6px 0 14px}
.act-title{font-size:clamp(26px,3vw,34px);line-height:1.15;font-weight:700;margin:6px 0 12px}
.act-inner{max-width:1180px;margin:0 auto;width:100%}
.act,.how{padding:clamp(48px,7vw,96px) 16px;border-top:1px solid var(--line)}
.act-one{border-top:0;padding-top:clamp(32px,5vw,64px)}
.prose{margin:0 0 16px}
.prose b{color:var(--ink);font-weight:600;font-family:var(--sans);font-size:.94em}
.act-hint{font-family:var(--mono);font-size:12px;color:var(--ink-3)}

/* scroll progress under the bar (home only) */
.scroll-line{position:absolute;left:0;right:0;bottom:-1px;height:3px;pointer-events:none}
.scroll-line i{display:block;height:100%;width:0;background:var(--ink);opacity:.5}

/* first run */
.first-run{padding:40px 16px;border-top:1px solid var(--line);background:var(--surface)}
.first-inner{max-width:1180px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.first-inner .tog-row{display:flex;flex-wrap:wrap;gap:8px}

/* rows (act 1 and act 2) */
.lang-rows{display:flex;flex-direction:column;gap:8px}
.lang-row{display:grid;grid-template-columns:118px minmax(0,1fr);gap:4px 16px;align-items:center;padding:8px 14px;border-radius:var(--r-card);background:var(--surface);border:1px solid var(--line)}
.lang-row.en{background:transparent;border-color:transparent}
.row-name{display:flex;flex-direction:column;align-items:flex-start;gap:0;font-size:11.5px;color:var(--ink-3)}
.row-name [data-script="devanagari"]{font-family:"Noto Sans Devanagari",var(--sans)}
.row-name [data-script="bengali"],.tp-lang [data-script="bengali"]{font-family:"Noto Sans Bengali",var(--sans)}
.row-name [data-script="arabic"],.tp-lang [data-script="arabic"]{font-family:"Noto Naskh Arabic",var(--sans);font-size:13px}
.row-name b{font-weight:600;font-size:15px;color:var(--ink)}
.row-tiles{display:flex;flex-wrap:wrap;gap:8px 6px;align-items:flex-end;padding-top:14px;min-height:44px;min-width:0}
.row-tr{grid-column:2;direction:ltr;font-family:var(--mono);font-size:12px;color:var(--ink-3);overflow-wrap:anywhere}
.row-why{grid-column:1/-1;font-family:var(--serif);font-size:15px;color:var(--ink-2);border-top:1px dashed var(--line);padding-top:8px;margin-top:4px}
.row-cap{grid-column:1/-1;font-size:12px;color:var(--ink-2);min-height:0}
.row-cap:empty{display:none}
.lang-row .tile{cursor:pointer;transition:opacity .2s,box-shadow .2s,transform .2s;will-change:transform}
.tile .role{position:absolute;top:-17px;left:0;font-family:var(--mono);font-size:10px;letter-spacing:.04em;color:var(--ink-2);white-space:nowrap;pointer-events:none;display:none}
.tile.hovered .role{display:block}
@media (max-width:900px){.tile.hovered .role{display:none}}
.dimming .tile{opacity:.3}
.dimming .tile.lit{opacity:1;box-shadow:0 0 0 1px var(--line),0 6px 20px rgba(0,0,0,.18);transform:translateY(-2px)}
.tile.en{font-size:19px}
/* Arabic: the tiles flow right to left but the block sits at the left, next to its label and romanisation; Naskh reads small, so a little larger */
.row-tiles[dir="rtl"]{justify-content:flex-end}
.lang-row .tile[data-script="arabic"],.machine .tile[data-script="arabic"]{font-size:21px;padding-top:3px;padding-bottom:2px}
.river .tile[data-script="arabic"]{font-size:17px;padding-top:2px;padding-bottom:1px}
@media (max-width:640px){
  .lang-row{grid-template-columns:1fr;gap:2px;padding:10px 12px}
  .lang-row .row-name{flex-direction:row;gap:8px;align-items:baseline}
  .row-tr{grid-column:1}
  .row-tiles{padding-top:16px}
  .tile{font-size:16px}
  .tile.en{font-size:17px}
  .lang-row .tile[data-script="arabic"],.machine .tile[data-script="arabic"]{font-size:19px}
  /* rows wrap on phones: right-to-left rows start at the right so a second line reads on correctly */
  .row-tiles[dir="rtl"]{justify-content:flex-start}
  .row-tiles[dir="rtl"] + .row-tr{text-align:right}
}

/* act 1 */
.act-one .act-inner{max-width:1180px}
.act-one .prose{max-width:62ch}
.one-stage{margin-top:24px;position:relative}
.one-stage .lang-row{opacity:1}
.one-stage.pre .lang-row:not(.en){opacity:0;transform:translateY(8px)}
.one-stage .lang-row.in{opacity:1;transform:none;transition:opacity .28s ease-out,transform .28s ease-out}
.one-foot{margin-top:16px;display:flex;gap:12px;align-items:center}
.ghost-tile{position:fixed;z-index:25;pointer-events:none;margin:0}

/* how intro */
.contents{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:14px}
.contents a{color:var(--ink-2);text-decoration:none;border-bottom:1px solid var(--line);min-height:32px;display:inline-flex;align-items:center}
.contents a:hover{color:var(--ink);border-color:var(--ink)}

/* act 2: machine */
.m-grid{display:grid;grid-template-columns:300px minmax(0,1fr);gap:40px;align-items:start}
.act-side{position:sticky;top:calc(var(--bar-h) + 24px);display:flex;flex-direction:column;gap:18px}
.m-ctl{display:flex;flex-direction:column;gap:8px}
.ctl-label{font-size:12px;font-weight:600;color:var(--ink-2);margin-top:6px}
.ctl-label:first-child{margin-top:0}
.m-chips{display:flex;flex-wrap:wrap;gap:6px}
.m-chips .chip{white-space:normal;text-align:left;line-height:1.3;padding:6px 12px}
/* variant control: wraps onto more lines instead of overflowing the side column */
#variant-seg{display:flex;flex-wrap:wrap;width:100%}
#variant-seg button{flex:1 1 auto;min-width:0;white-space:normal;line-height:1.2;padding:4px 10px}
.ctl-hint{font-size:14px;color:var(--ink-2);margin:2px 0 0;min-height:2.6em}
.m-extra{display:flex;flex-direction:column;gap:8px}
.recipe{display:flex;flex-wrap:wrap;gap:4px}
.rid{font-size:12.5px;padding:3px 8px;border-radius:var(--r-tile);background:var(--cs,var(--surface-2));color:var(--ink);border-bottom:2px solid var(--c,var(--line))}
.legend{display:flex;flex-wrap:wrap;gap:8px 14px;font-size:12px;color:var(--ink-2)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{width:14px;height:4px;border-radius:2px;display:inline-block}
.legend i.x{height:10px;border:1px dashed var(--neutral);background:transparent}
.hover-cap{font-size:13px;color:var(--ink-2);min-height:1.4em;margin:0}
.hover-cap b{color:var(--ink);font-weight:600}
.machine .tile{font-size:18px;padding:5px 9px 4px}
@media (max-width:900px){
  .m-grid{display:flex;flex-direction:column;gap:14px;align-items:stretch}
  .act-side{display:contents}
  .m-head .prose{margin-bottom:0}
  .m-ctl{position:sticky;top:var(--bar-h);z-index:5;background:var(--bg);margin:0 -16px;padding:8px 16px 10px;border-bottom:1px solid var(--line)}
  .m-ctl .ctl-label{display:none}
  .m-chips{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin:0 -16px;padding:0 16px}
  .m-chips::-webkit-scrollbar{display:none}
  .m-chips .chip{white-space:nowrap;min-height:40px}
  .ctl-hint{font-size:13px;min-height:0}
  .m-extra{display:none}
  .m-rows{width:100%}
}
@media (min-width:901px){ .row-cap{display:none} }

/* act 3: rivers */
.rivers-now{margin:-4px 0 14px}
.rivers-list{display:flex;flex-direction:column;gap:10px}
.river{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:12px 16px;display:flex;flex-direction:column;gap:8px;min-width:0}
.river-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px;flex-wrap:wrap}
.river-head b{font-weight:600;font-size:16px}
.river-count{display:flex;align-items:baseline;gap:8px;color:var(--ink-3);font-size:13px}
.river-count .num{font-size:28px;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums;line-height:1}
.river-count .lab{font-family:var(--mono);font-size:11px;color:var(--ink-2)}
.river-body{position:relative;display:flex;flex-direction:column;gap:0;padding:2px 0}
.river-body svg{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}
.river .lbl{font-family:var(--mono);font-size:11px;color:var(--ink-3);margin:0 0 4px;position:static}
.river .lbl.below{margin:4px 0 0}
.river .tiles{display:flex;flex-wrap:wrap;gap:6px;align-items:flex-end;position:relative;z-index:1}
.river .tiles[dir="rtl"]{justify-content:flex-end}
.river .tiles.bot{margin-top:56px}
.river .tile{font-size:15px;cursor:pointer;padding:4px 8px 3px;border-bottom-width:2px;cursor:pointer}
.ribbon{fill:none;stroke-width:2.2;opacity:var(--ribbon-op);transition:opacity .2s,stroke-width .2s}
.ribbon.lit{opacity:1;stroke-width:3.5}
.river-body.dimming .ribbon:not(.lit){opacity:.12}
/* vertical rivers on phones */
.river.vert .river-body{display:grid;grid-template-columns:40% 20% 40%;align-items:start}
.river.vert .tiles{flex-direction:column;align-items:stretch;gap:6px;margin:0}
.river.vert .tiles.top{grid-column:1}
.river.vert .tiles.bot{grid-column:3}
.river.vert .tile{height:34px;justify-content:center;overflow:hidden;text-overflow:ellipsis;font-size:14px;white-space:nowrap;display:flex}
.river.vert .lbl{grid-row:1}
.river.vert .lbl.top-l{grid-column:1}
.river.vert .lbl.bot-l{grid-column:3;margin:0 0 4px}
.river.vert .tiles{grid-row:2}

/* act 4: tenses */
.tp{display:grid;grid-template-columns:360px minmax(0,1fr);gap:48px;align-items:start}
.tp-side{position:sticky;top:calc(var(--bar-h) + 24px);display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.tp-intro{font-size:15px;margin:0}
.tp-sticky{width:100%}
.tp-grid{display:grid;grid-template-columns:auto repeat(3,minmax(0,1fr));gap:6px;width:100%;position:relative}
.tp-ch{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);text-align:center}
.tp-ch.first{padding:0}
.tp-line{grid-column:2/-1;height:9px;position:relative;margin:-4px 0 2px}
.tp-line::before{content:"";position:absolute;left:0;right:5px;top:4px;height:1px;background:var(--ink-3)}
.tp-line::after{content:"";position:absolute;right:0;top:0;border-left:6px solid var(--ink-3);border-top:4.5px solid transparent;border-bottom:4.5px solid transparent}
.tp-line i{position:absolute;left:50%;top:1px;width:7px;height:7px;border-radius:50%;background:var(--ink-2);transform:translateX(-50%)}
.tp-rh{grid-column:1;font-size:12px;font-weight:600;color:var(--ink-2);align-self:start;padding:13px 6px 0 0;text-align:right}
.tp-rh .s{display:none}
.tp-cell{display:flex;flex-direction:column;align-items:center;gap:5px;min-width:0;border:0;background:none;padding:0;cursor:pointer;color:var(--ink)}
.tp-cell .c{width:100%;min-height:44px;display:grid;place-items:center;padding:4px 6px;font-size:13px;line-height:1.2;border:1px solid var(--line);background:var(--surface);border-radius:var(--r-ctl);text-align:center}
.tp-cell:hover .c{border-color:var(--ink-3)}
.tp-cell[aria-pressed="true"] .c{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.tp-cell .c .short{display:none}
.tp-count{display:flex;align-items:center;gap:5px;font-family:var(--mono);font-size:11px;line-height:1;color:var(--ink-2);font-variant-numeric:tabular-nums}
.tp-bar{display:block;width:26px;height:4px;border-radius:2px;background:var(--line);overflow:hidden}
.tp-bar i{display:block;height:100%;background:var(--ink-2)}
.tp-cell[aria-pressed="true"] .tp-count{color:var(--ink)}
.tp-cell[aria-pressed="true"] .tp-bar i{background:var(--ink)}
.tp-legend{margin:0;line-height:1.5}
.tp-now{display:none}
.tp-main{min-width:0}
.tp-head{display:flex;flex-direction:column;gap:4px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.tp-head .en{font-size:28px;font-weight:600;line-height:1.2}
.tp-head .hint{font-size:14px;color:var(--ink-2);margin-top:4px}
.tp-rows{display:flex;flex-direction:column}
.tp-row{display:grid;grid-template-columns:120px minmax(0,1fr);gap:2px 16px;padding:11px 0;border-bottom:1px solid var(--line)}
.tp-lang b{display:block;font-size:15px;font-weight:600}
.tp-lang span{font-size:11.5px;color:var(--ink-3)}
.tp-body{display:flex;flex-direction:column;gap:4px;min-width:0}
.tp-sent{font-size:22px;line-height:1.35;overflow-wrap:anywhere}
.tp-sent[data-script="devanagari"]{font-family:"Noto Sans Devanagari",var(--sans)}
.tp-sent[data-script="bengali"]{font-family:"Noto Sans Bengali",var(--sans)}
.tp-sent[data-script="arabic"]{font-family:"Noto Naskh Arabic",var(--sans);font-size:25px;line-height:1.5}
.tp-sent[dir="rtl"]{text-align:left}
.tp-w{display:inline-block;position:relative}
mark,.tp-sent mark,.tp-head mark{background:var(--turn-soft);color:var(--ink);border-bottom:3px solid var(--turn);padding:0 3px;border-radius:3px}
.tp-trl{font-family:var(--mono);font-size:13px;color:var(--ink-3)}
.tp-trl mark{border-bottom-width:2px;color:var(--ink-2)}
.tp-alt{font-size:13px;color:var(--ink-2)}
.tp-alt .t[data-script="arabic"]{font-size:15px}
.tp-meta{display:flex;gap:8px;align-items:baseline;flex-wrap:wrap;font-size:14px;color:var(--ink-2)}
.badge{font-size:11px;padding:1px 8px;border-radius:999px;border:1px dashed var(--line);color:var(--ink-2);white-space:nowrap}
.badge.none{border-style:solid;color:var(--ink-3)}
.tp-noteline{display:flex;gap:8px;align-items:baseline;min-width:0}
.tp-note{font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;margin:0;flex:1;min-width:0}
.tp-note.open{-webkit-line-clamp:unset;display:block}
.tp-more{font-size:13px;flex:none}
.tp-same{font-size:13px;color:var(--ink-3)}
/* test me */
.tp-sent button.tp-w{font:inherit;border:1px dashed var(--line);background:var(--surface);border-radius:4px;padding:0 4px;margin:1px 0;cursor:pointer;color:var(--ink);min-height:36px}
.tp-sent button.tp-w:hover{border-color:var(--ink-3)}
.tp-sent .tp-w.wrong{text-decoration:line-through;text-decoration-color:var(--bad);color:var(--ink-2)}
.tp-q{font-size:13px;color:var(--ink-2)}
.tp-fb{font-size:14px;font-weight:600}
.tp-fb.ok{color:var(--ok)} .tp-fb.no{color:var(--bad)}
@media (max-width:900px){
  .tp{display:flex;flex-direction:column;gap:12px;align-items:stretch}
  .tp-side{position:static;display:contents}
  .tp-sticky{position:sticky;top:var(--bar-h);z-index:6;background:var(--bg);margin:0 -16px;padding:8px 16px 8px;border-bottom:1px solid var(--line);width:auto}
  .tp-now{display:block;font-size:17px;font-weight:600;padding-top:6px}
  .tp-now .eyebrow{margin-left:6px}
  .tp-head .en,.tp-head .eyebrow{display:none}
  .tp-head{border-bottom:0;padding-bottom:0}
}
@media (max-width:640px){
  .tp-grid{gap:4px}
  .tp-rh{padding:12px 4px 0 0;font-size:11px}
  .tp-rh .s{display:inline}
  .tp-rh .l{display:none}
  .tp-cell .c{min-height:40px;font-size:12.5px;padding:2px 4px}
  .tp-cell .c .long{display:none}
  .tp-cell .c .short{display:inline}
  .tp-bar{width:18px}
  .tp-count{gap:4px;font-size:10.5px}
  .tp-row{grid-template-columns:1fr;gap:3px;padding:10px 0}
  .tp-lang{display:flex;gap:8px;align-items:baseline}
  .tp-lang b{display:inline}
  .tp-sent{font-size:19px}
  .tp-sent[data-script="arabic"]{font-size:22px}
  .tp-sent[dir="rtl"],.tp-sent[dir="rtl"] + .tp-trl{text-align:right}
}

/* the parts */
.stack{display:flex;flex-direction:column;gap:6px;max-width:880px}
.band{display:grid;grid-template-columns:150px 1fr auto;gap:12px;align-items:center;padding:12px 14px;border-radius:var(--r-ctl);background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--c)}
.band b{font-size:15px;font-weight:600}
.band span{font-size:14px;color:var(--ink-2)}
.band .port{font-family:var(--mono);font-size:11px;color:var(--ink-3);text-align:right}
@media (max-width:640px){.band{grid-template-columns:1fr;gap:2px}.band .port{text-align:left}}

/* next */
.next-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:8px}
.next-card{position:relative;display:flex;flex-direction:column;gap:4px;min-height:88px;padding:16px 44px 16px 18px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);text-decoration:none;color:var(--ink)}
.next-card b{font-size:18px;font-weight:600}
.next-card span{font-size:14px;color:var(--ink-2)}
.next-card i{position:absolute;right:16px;top:16px;font-style:normal;font-size:18px;color:var(--ink-2)}
.next-card:hover{border-color:var(--ink-3)}
.next-card.primary{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.next-card.primary span,.next-card.primary i{color:var(--bg);opacity:.85}
@media (max-width:760px){.next-cards{grid-template-columns:1fr}}

.load-err{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.tp-fb:focus{outline:none}
#tp-test{align-self:flex-start}