/* DT_TGS_V1 study Mini App (dibateb.net/tgs_*.php) - mobile-first, light + night */
:root{--fs:17px;--bg:#f4f6fb;--card:#fff;--ink:#14213d;--mut:#5b6476;--line:#e3e8f2;--pri:#0055F8;--pri2:#e8f0ff;--ok:#0f9d58;--bad:#d93025;--warn:#b26a00;--mark:#fff3a3;--shadow:0 1px 3px rgba(20,33,61,.08),0 6px 18px rgba(20,33,61,.05)}
:root[data-theme="dark"]{--bg:#0d1320;--card:#161e2e;--ink:#e6ebf5;--mut:#9aa6bd;--line:#26324a;--pri:#5b8cff;--pri2:#1b2742;--ok:#3ccf83;--bad:#ff6b5e;--warn:#ffb347;--mark:#5a4b00;--shadow:none}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0d1320;--card:#161e2e;--ink:#e6ebf5;--mut:#9aa6bd;--line:#26324a;--pri:#5b8cff;--pri2:#1b2742;--ok:#3ccf83;--bad:#ff6b5e;--warn:#ffb347;--mark:#5a4b00;--shadow:none}}
*{box-sizing:border-box;min-width:0}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Vazirmatn,Tahoma,sans-serif;font-size:16px;line-height:1.8;overflow-x:hidden;padding-bottom:env(safe-area-inset-bottom)}
a{color:var(--pri)}
.tb{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:6px;padding:6px 10px;background:var(--card);border-bottom:1px solid var(--line)}
.tb-t{flex:1;margin:0;font-size:16px;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tb-b,.tb-i,.tb-logo{display:inline-flex;align-items:center;justify-content:center;min-width:44px;height:44px;border-radius:12px;border:0;background:transparent;color:var(--ink);font:inherit;font-size:20px;text-decoration:none;cursor:pointer}
.tb-i small{font-size:12px}
.tb-b:active,.tb-i:active{background:var(--pri2)}
.wrap{max-width:760px;margin:0 auto;padding:12px 16px 90px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px 16px;margin:0 0 12px;box-shadow:var(--shadow)}
.card h2{margin:0 0 6px;font-size:17px}
.card p{margin:4px 0}
.hero h2{font-size:19px}
.mut,.src{color:var(--mut);font-size:14px}
.due{color:var(--warn);font-weight:700;font-size:14px}
.row{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:8px 16px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--ink);font:inherit;font-weight:700;font-size:15px;text-decoration:none;cursor:pointer}
.btn.pri{background:var(--pri);border-color:var(--pri);color:#fff}
.btn[disabled]{opacity:.45;cursor:default}
.btn.wide{width:100%;margin-top:10px}
.lnk{display:inline-flex;align-items:center;min-height:44px;font-weight:700;text-decoration:none}
.chips{display:flex;gap:8px;overflow-x:auto;padding:2px 0 8px;margin:0 0 6px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chips.wrapc{flex-wrap:wrap;overflow:visible}
.chip{flex:0 0 auto;display:inline-flex;align-items:center;min-height:44px;padding:6px 14px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--ink);font:inherit;font-size:14px;font-weight:700;text-decoration:none;cursor:pointer;white-space:nowrap}
.chip.on{background:var(--pri);border-color:var(--pri);color:#fff}
.streak{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px 14px;align-items:center}
.st-n{display:flex;flex-direction:column;align-items:center;justify-content:center;width:84px;height:84px;border-radius:20px;background:linear-gradient(135deg,#ff8a00,#ff3d54);color:#fff}
.st-n b{font-size:30px;line-height:1}
.st-n span{font-size:11px}
.st-t .hi{font-weight:800}
.badges{grid-column:1/-1;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.badge{display:flex;flex-direction:column;align-items:center;padding:6px 2px;border-radius:12px;border:1px dashed var(--line);font-size:22px;opacity:.35;filter:grayscale(1)}
.badge.on{opacity:1;filter:none;border-style:solid;background:var(--pri2)}
.badge small{font-size:11px;color:var(--mut)}
.list{list-style:none;margin:6px 0 0;padding:0}
.li{display:flex;align-items:center;gap:8px;min-height:48px;padding:6px 0;border-top:1px solid var(--line);color:var(--ink);text-decoration:none;flex-wrap:wrap}
.list li:first-child .li{border-top:0}
.li-k{flex:0 0 auto;font-size:12px;font-weight:800;color:var(--pri);background:var(--pri2);padding:2px 8px;border-radius:8px}
.li-t{flex:1 1 60%;font-size:15px;line-height:1.6}
.pbar{flex:1 1 100%;height:4px;border-radius:4px;background:var(--line);overflow:hidden}
.pbar i{display:block;height:100%;background:var(--pri)}
.tag{font-size:12px;color:var(--mut);border:1px solid var(--line);border-radius:8px;padding:0 6px}
.mini{margin:8px 0 0;padding:0 18px 0 0;color:var(--mut);font-size:13px}
.kpis{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:8px 0}
.kpis div{background:var(--pri2);border-radius:12px;padding:8px;text-align:center}
.kpis b{display:block;font-size:22px}
.kpis span{font-size:12px;color:var(--mut)}
.search{width:100%;min-height:44px;margin:4px 0 6px;padding:8px 12px;border-radius:12px;border:1px solid var(--line);background:var(--bg);color:var(--ink);font:inherit;font-size:15px}
.ch{display:grid;grid-template-columns:34px minmax(0,1fr);gap:4px 8px;align-items:center;padding:8px 0;border-top:1px solid var(--line)}
.ch:first-child{border-top:0}
.ch-n{width:30px;height:30px;border-radius:9px;background:var(--pri2);color:var(--pri);font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center}
.ch-t{font-size:15px;line-height:1.6}
.ch-a{grid-column:2;display:flex;flex-wrap:wrap;gap:6px}
.sbtn{display:inline-flex;align-items:center;min-height:44px;padding:4px 14px;border-radius:10px;background:var(--pri2);color:var(--pri);font-weight:800;font-size:14px;text-decoration:none}
.sbtn.q{background:transparent;border:1px solid var(--line);color:var(--ink)}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:8px}
.tile{display:flex;flex-direction:column;gap:2px;min-height:72px;padding:10px 12px;border-radius:14px;border:1px solid var(--line);background:var(--bg);color:var(--ink);text-decoration:none}
.tile b{font-size:14px;line-height:1.5}
.tile small{color:var(--pri);font-weight:700}
.stack{display:grid;gap:10px;margin-bottom:12px}
.tile.big{display:grid;grid-template-columns:44px minmax(0,1fr);grid-template-rows:auto auto;column-gap:10px;background:var(--card);box-shadow:var(--shadow);padding:14px}
.tile.big .ic{grid-row:1/3;font-size:30px;display:flex;align-items:center;justify-content:center}
.tile.big b{font-size:16px}
.tile.big small{color:var(--mut);font-weight:400;font-size:14px}
.foot{text-align:center;color:var(--mut);font-size:12px;margin:16px 0}
.note{background:var(--pri2);border-radius:12px;padding:10px 12px;font-size:14px;margin:0 0 10px}
/* reader */
.prog{position:sticky;top:57px;z-index:19;height:3px;background:transparent}
.prog i{display:block;height:100%;width:0;background:var(--pri);transition:width .2s}
.rd-head{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:2px 0 10px}
.kchip{font-size:12px;font-weight:800;color:#fff;background:var(--pri);border-radius:8px;padding:2px 10px}
.rd{font-size:var(--fs);line-height:2;overflow-wrap:anywhere;word-break:normal}
.rd>*:first-child{margin-top:0}
.rd h1,.rd h2,.rd h3,.rd h4{line-height:1.6;margin:1.2em 0 .5em}
.rd h1{font-size:1.35em}.rd h2{font-size:1.2em}.rd h3{font-size:1.08em;color:var(--pri)}.rd h4{font-size:1em}
.rd p{margin:.5em 0}
.rd ul,.rd ol{padding-right:1.3em;padding-left:0;margin:.4em 0}
.rd li{margin:.2em 0}
.rd img{display:block;max-width:100%;height:auto;margin:10px auto;border-radius:10px;background:#fff}
.rd figure{margin:12px 0;padding:0}
.rd figcaption,.rd .cap{font-size:.85em;color:var(--mut);text-align:center;line-height:1.7}
.rd svg{max-width:100%;height:auto}
.rd .tw{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;margin:10px 0;border:1px solid var(--line);border-radius:10px}
.rd table{border-collapse:collapse;width:100%;font-size:.88em;line-height:1.7}
.rd td,.rd th{border:1px solid var(--line);padding:6px 8px;vertical-align:top;min-width:90px}
.rd th,.rd td.b{background:var(--pri2);font-weight:700}
.rd .eng,.rd .latin,.rd [lang="en"]{unicode-bidi:isolate}
.rd .hl-key,.rd strong,.rd b{font-weight:800}
.rd .hl-key{background:linear-gradient(transparent 55%,rgba(0,85,248,.16) 55%)}
.rd .part-banner,.rd .rpn{display:block;margin:18px 0 10px;padding:10px 14px;border-radius:12px;background:var(--pri);color:#fff !important;font-weight:800;font-size:.95em}
.rd .part-banner *{color:#fff !important;background:transparent !important}
.rd .rpn{background:var(--pri2);color:var(--mut) !important;font-size:.8em;padding:4px 10px;display:inline-block}
.rd details{border:1px solid var(--line);border-radius:12px;padding:6px 12px;margin:8px 0;background:var(--card)}
.rd summary{cursor:pointer;font-weight:800;min-height:40px;display:flex;align-items:center}
.rd .anki-flip{border:1px solid var(--line);border-radius:12px;margin:8px 0;padding:8px 12px;background:var(--bg)}
.rd .anki-front{font-weight:800}
.rd .anki-back{border-top:1px dashed var(--line);margin-top:6px;padding-top:6px}
.rd .blur-target{filter:blur(5px);cursor:pointer;transition:filter .2s}
.rd .blur-target.shown{filter:none}
.rd .hs{font-weight:800;color:var(--pri);margin:1em 0 .3em}
.rd .chn{color:var(--mut)}.rd .chap{font-size:1.3em;font-weight:800}
.rd .rf{margin:.45em 0}
.rd .k-heading,.rd .k-subheading{font-weight:800;color:var(--pri);margin-top:1em}
.rd .k-caption{font-size:.85em;color:var(--mut)}
.rd .k-ref{font-size:.8em;color:var(--mut);direction:ltr;text-align:left}
.rd .fg{border:1px solid var(--line)}
.rd .te{display:flex;justify-content:space-between;gap:10px}
.rd .te .tp{color:var(--mut);flex:0 0 auto}
.rd .te.h{font-weight:800}
:root[data-theme="dark"] .rd [style]{color:inherit !important}
.rd mark{background:var(--mark);color:inherit;border-radius:3px;padding:0 1px}
.rd mark.c2{background:#b9f6ca}.rd mark.c3{background:#f8bbd0}
:root[data-theme="dark"] .rd mark.c2{background:#1d5a3a}:root[data-theme="dark"] .rd mark.c3{background:#5e2a3d}
.rd .bm-flag{outline:2px dashed var(--pri);outline-offset:4px;border-radius:4px}
.selbar{position:fixed;z-index:40;display:flex;gap:6px;padding:6px;border-radius:14px;background:#14213d;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.selbar button{min-height:44px;padding:4px 12px;border:0;border-radius:10px;background:transparent;color:#fff;font:inherit;font-weight:700;font-size:14px;cursor:pointer}
.selbar button:active{background:rgba(255,255,255,.15)}
.fab{position:fixed;left:16px;bottom:calc(18px + env(safe-area-inset-bottom));z-index:30;width:52px;height:52px;border-radius:50%;border:0;background:var(--pri);color:#fff;font-size:22px;box-shadow:0 6px 18px rgba(0,85,248,.35);cursor:pointer}
.sheet{position:fixed;inset:0;z-index:50;background:rgba(10,15,30,.45);display:flex;align-items:flex-end;justify-content:center}
.sheet[hidden]{display:none}
.sheet-in{width:100%;max-width:760px;max-height:82vh;display:flex;flex-direction:column;background:var(--card);border-radius:18px 18px 0 0;padding:6px 16px calc(16px + env(safe-area-inset-bottom))}
.sheet-h{display:flex;align-items:center;justify-content:space-between;gap:8px;border-bottom:1px solid var(--line)}
.sheet-b{overflow-y:auto;padding:10px 0;font-size:var(--fs);line-height:1.95}
.sheet-b .q{background:var(--pri2);border-radius:10px;padding:8px 10px;font-size:.9em;margin-bottom:8px}
.sheet-b .mut{font-size:13px;margin-top:10px}
.mk{display:flex;align-items:center;gap:8px;border-top:1px solid var(--line);padding:4px 0}
.mk a{flex:1;min-height:44px;display:flex;align-items:center;color:var(--ink);text-decoration:none;font-size:15px}
.mk button{min-height:44px;min-width:44px;border:0;background:transparent;color:var(--bad);font:inherit;cursor:pointer}
.toast{position:fixed;bottom:calc(84px + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);z-index:60;max-width:calc(100% - 32px);background:#14213d;color:#fff;padding:10px 16px;border-radius:12px;font-size:14px;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.toast[hidden]{display:none}
.toast button{margin-right:8px;min-height:44px;border:0;border-radius:8px;background:var(--pri);color:#fff;font:inherit;font-weight:700;padding:0 10px}
.dots{display:inline-block;animation:tgsb 1.2s infinite}
@keyframes tgsb{50%{opacity:.3}}
/* quiz */
.qz-top{display:flex;justify-content:space-between;align-items:center;font-weight:800;color:var(--mut);font-size:14px}
.timer{font-variant-numeric:tabular-nums;background:var(--pri2);color:var(--pri);border-radius:10px;padding:2px 10px;direction:ltr}
.timer.low{color:#fff;background:var(--bad)}
.qz-src{font-size:12px;color:var(--mut);margin:4px 0}
.qz-q{font-size:var(--fs);line-height:1.9;font-weight:700;margin:6px 0 10px}
.opts{display:grid;gap:8px}
.opt{display:flex;gap:10px;align-items:flex-start;width:100%;min-height:48px;padding:10px 12px;border-radius:12px;border:1.5px solid var(--line);background:var(--card);color:var(--ink);font:inherit;font-size:calc(var(--fs) - 1px);line-height:1.7;text-align:right;cursor:pointer}
.opt b{flex:0 0 auto;color:var(--pri)}
.opt.sel{border-color:var(--pri);background:var(--pri2)}
.res-n{font-size:44px;font-weight:900;text-align:center;line-height:1.2}
.res-n small{display:block;font-size:14px;color:var(--mut);font-weight:400}
.wr{border-top:1px solid var(--line);padding:10px 0}
.wr .qt{font-weight:700;margin-bottom:6px}
.wr .a-bad{color:var(--bad)}.wr .a-ok{color:var(--ok)}
.wr details{margin-top:6px}
.wr summary{min-height:44px;display:flex;align-items:center;font-weight:700;color:var(--pri);cursor:pointer}
.wr .ex{font-size:calc(var(--fs) - 1px);line-height:1.9;background:var(--bg);border-radius:10px;padding:8px 10px}
@media (min-width:700px){.wrap{padding:16px 20px 90px}.grid2{grid-template-columns:repeat(4,minmax(0,1fr))}}