/* study.css — Study English A2Z (học viên) + phần quản trị Study trong Class & tools. Nạp sau home.css. */
#study{height:100%;overflow:auto;background:#f4f6fb}
.sy-root{--sy-acc:#0e8fa6;--sy-ok:#1e8e4f;--sy-bad:#c62828;--sy-mid:#b7791f;--sy-line:#e3e8f0;--sy-soft:#f6f8fc;font-size:15px;line-height:1.55}
.sy-in{max-width:var(--pg-max,1120px);margin:0 auto;padding:0 var(--pg-pad,20px)}
.sy-exit{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);color:#fff;border-radius:10px;padding:8px 12px;font:700 13px Montserrat,Arial,sans-serif;cursor:pointer;white-space:nowrap}
.sy-exit:hover{background:rgba(255,255,255,.16)}
.sy-tabs{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--sy-line)}
.sy-tabs .sy-in{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.sy-tabs .sy-in::-webkit-scrollbar{display:none}
.sy-tabs button{display:flex;align-items:center;gap:7px;border:0;background:none;padding:13px 12px 11px;border-bottom:3px solid transparent;font:700 13.5px Montserrat,Arial,sans-serif;color:#5a6b7e;cursor:pointer;white-space:nowrap}
.sy-tabs button svg,.sy-head svg,.sy-sech svg,.sy-card h2 svg,.sy-recb svg,.sy-lvl svg,.sy-note svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.sy-tabs button[aria-selected=true]{color:#0f1b2d;border-bottom-color:var(--sy-acc)}
.sy-tabs button:hover{color:#0f1b2d}
.sy-main{padding-top:20px !important;padding-bottom:48px !important}
.sy-card{background:#fff;border:1px solid var(--sy-line);border-radius:16px;padding:18px 20px;margin:0 0 16px;box-shadow:0 8px 24px -18px rgba(15,27,45,.35)}
.sy-card h2{display:flex;align-items:center;gap:8px;margin:0 0 10px;font-size:16px;font-weight:800}
.sy-warn{border-color:#f0c36d;background:#fffaf0}
.sy-note{display:flex;gap:10px;align-items:flex-start;background:#fff7e6;border:1px solid #f3d9a4;border-radius:12px;padding:10px 14px;margin:0 0 16px;font-size:14px}
.sy-hero{display:flex;gap:20px;align-items:flex-end;flex-wrap:wrap;background:#0a1428;color:#fff;border-radius:20px;padding:24px 26px;margin:0 0 18px;background-image:radial-gradient(600px 260px at 90% -30%,rgba(255,77,94,.35),transparent 60%),radial-gradient(500px 260px at 0% 140%,rgba(56,120,255,.38),transparent 60%)}
.sy-hero>div:first-child{flex:1;min-width:260px}
.sy-hero h1{margin:0;font-size:clamp(22px,3vw,30px);font-weight:800}
.sy-hero h1 em{font-style:normal;background:linear-gradient(90deg,#ff8a95,#ffd36e);-webkit-background-clip:text;background-clip:text;color:transparent}
.sy-hero p{margin:8px 0 0;color:#c3cfe2;font-size:14.5px}
.sy-kpis{display:flex;gap:10px;flex-wrap:wrap}
.sy-kpis div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:14px;padding:10px 14px;min-width:110px}
.sy-kpis b{display:block;font-size:22px}.sy-kpis small{color:#c3cfe2;font-size:12px;font-weight:600}
.sy-due{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:#eefaf3;border-color:#bfe6cf}
.sy-secs{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px;margin:0 0 18px}
.sy-sec{background:#fff;border:1px solid var(--sy-line);border-radius:16px;padding:16px 18px;display:flex;flex-direction:column;box-shadow:0 8px 24px -18px rgba(15,27,45,.35);border-top:4px solid var(--sy-acc)}
.sy-sec.s-grammar{border-top-color:#6b5bd2}.sy-sec.s-vocab{border-top-color:#d97706}.sy-sec.s-listening{border-top-color:#0e8fa6}.sy-sec.s-writing{border-top-color:#c2410c}.sy-sec.s-speaking{border-top-color:#15803d}
.sy-sech{display:flex;align-items:center;gap:8px;font-size:17px}
.sy-secd{flex:1;margin:6px 0 10px;color:#5a6b7e;font-size:13.5px}
.sy-bar{display:block;height:7px;background:#e8edf4;border-radius:99px;overflow:hidden}
.sy-bar i{display:block;height:100%;background:var(--sy-acc);border-radius:99px}
.sy-bar i.ok{background:var(--sy-ok)}.sy-bar i.bad{background:var(--sy-bad)}
.sy-barl{display:block;margin-top:4px;font-size:12px;color:#6b7a8d;font-weight:600}
.sy-secb{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}
.sy-root .btn{font:700 13.5px Montserrat,Arial,sans-serif;border-radius:10px;padding:8px 14px;border:1px solid #c9d2df;background:#fff;color:#0f1b2d;display:inline-flex;align-items:center;gap:6px}
.sy-root .btn.primary{background:#0f1b2d;border-color:#0f1b2d;color:#fff}
.sy-root .btn.ghost{background:transparent}
.sy-root .btn:disabled{opacity:.5;cursor:not-allowed}
.sy-root .btn svg{width:15px;height:15px;fill:currentColor;stroke:currentColor;stroke-width:1.2}
.sy-head{display:flex;align-items:center;gap:12px;margin:0 0 14px}
.sy-head>svg{width:34px;height:34px;padding:7px;background:#fff;border:1px solid var(--sy-line);border-radius:12px}
.sy-head h1{margin:0;font-size:24px}.sy-head .fine{margin:2px 0 0}
.sy-lv{display:flex;align-items:center;gap:10px;font-size:15px;margin:20px 0 8px;color:#33445a}
.sy-lv span{background:#0f1b2d;color:#fff;border-radius:8px;padding:2px 9px;font-size:13px}
.sy-rows{display:flex;flex-direction:column;gap:8px}
.sy-row{display:flex;align-items:center;gap:12px;width:100%;text-align:left;background:#fff;border:1px solid var(--sy-line);border-radius:12px;padding:12px 16px;cursor:pointer;font:inherit;color:inherit}
.sy-row:hover{border-color:#9fb0c6;box-shadow:0 6px 16px -12px rgba(15,27,45,.4)}
.sy-row.locked{opacity:.65}
.sy-rt{flex:1;min-width:0}.sy-rt b{display:block;font-size:15px}.sy-rt small{color:#6b7a8d;font-size:13px}
.sy-rb{display:flex;align-items:center;gap:6px;color:#8a97a8;font-weight:800}
.sy-rb svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2}
.sy-b{display:inline-block;border-radius:99px;padding:2px 9px;font-size:12px;font-weight:800;background:#eef2f7;color:#33445a}
.sy-b.ok{background:#e3f6ea;color:var(--sy-ok)}.sy-b.mid{background:#fff3dc;color:var(--sy-mid)}
.sy-band{display:inline-block;border-radius:6px;padding:1px 7px;font-size:11.5px;font-weight:800;background:#e8f1fb;color:#24508a;white-space:nowrap}
.sy-band.b5{background:#e9f7ef;color:#1e7e4f}.sy-band.b6{background:#e8f1fb;color:#24508a}.sy-band.b7{background:#f3ebfd;color:#6b3fb5}.sy-band.b8{background:#fdeaea;color:#a12828}
.sy-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.sy-topic{display:flex;flex-direction:column;gap:6px;text-align:left;background:#fff;border:1px solid var(--sy-line);border-radius:14px;padding:14px 16px;cursor:pointer;font:inherit;color:inherit}
.sy-topic:hover{border-color:#9fb0c6}.sy-topic.locked{opacity:.65}
.sy-topic b{font-size:16px}.sy-topic small{color:#6b7a8d;font-size:12.5px}
.sy-bands{display:flex;gap:4px;flex-wrap:wrap}.sy-bands i{font-style:normal;font-size:11px;font-weight:700;background:#f1f4f9;border-radius:5px;padding:1px 5px;color:#5a6b7e}
.sy-chips{display:flex;gap:6px;flex-wrap:wrap;margin:0 0 12px}
.sy-chips button{border:1px solid #c9d2df;background:#fff;border-radius:99px;padding:6px 13px;font:700 13px Montserrat,Arial,sans-serif;color:#33445a;cursor:pointer}
.sy-chips button[aria-pressed=true]{background:#0f1b2d;border-color:#0f1b2d;color:#fff}
.sy-chips.sm button{padding:4px 10px;font-size:12px}
.sy-seg{display:inline-flex;gap:2px;background:#e8edf4;border-radius:11px;padding:3px;margin:0 0 14px;flex-wrap:wrap}
.sy-seg button{border:0;background:transparent;border-radius:8px;padding:7px 13px;font:700 13px Montserrat,Arial,sans-serif;color:#5a6b7e;cursor:pointer}
.sy-seg button[aria-selected=true]{background:#fff;color:#0f1b2d;box-shadow:0 1px 3px rgba(0,0,0,.12)}
.sy-tools{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;align-items:flex-start}
.sy-recs{display:flex;flex-direction:column;gap:12px}
.sy-rec{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.sy-rec .aitype{min-width:180px}
.sy-recb{display:flex;align-items:center;gap:8px;text-align:left;background:var(--sy-soft);border:1px solid var(--sy-line);border-radius:10px;padding:7px 11px;cursor:pointer;font:inherit;color:inherit;max-width:320px}
.sy-recb:hover{border-color:#9fb0c6}.sy-recb b{display:block;font-size:13.5px}.sy-recb small{color:#6b7a8d;font-size:12px}
.sy-stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px;margin:0 0 16px}
.sy-stats div{background:#fff;border:1px solid var(--sy-line);border-radius:12px;padding:12px 14px}
.sy-stats b{display:block;font-size:22px}.sy-stats small{color:#6b7a8d;font-size:12px;font-weight:600}
.sy-ebars{display:flex;flex-direction:column;gap:10px}
.sy-ebar{border-bottom:1px solid #eef1f6;padding:0 0 8px}
.sy-el{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:4px}
.sy-el small.ok{color:var(--sy-ok)}.sy-el small.bad{color:var(--sy-bad)}
.sy-et{display:flex;align-items:center;gap:10px}
.sy-et i{display:block;height:10px;border-radius:99px;background:linear-gradient(90deg,#ff8a95,#d6001c);min-width:6px}
.sy-et b{font-size:15px}.sy-et small{color:#6b7a8d;font-size:12px}
.sy-ebar details{font-size:13.5px;margin-top:4px}
.sy-hist{border:1px solid var(--sy-line);border-radius:12px;padding:10px 14px;margin:0 0 10px;background:#fff}
.sy-hist summary{cursor:pointer}
.sy-mytext{background:var(--sy-soft);border-radius:10px;padding:10px 14px;margin:10px 0;font-size:14px}
.sy-ups{margin:14px 0 0}.sy-ups h4{margin:0 0 6px}
.sy-up{border-left:3px solid var(--sy-acc);padding:4px 0 4px 10px;margin:0 0 8px}
.sy-up .fr{display:block;color:#7a8799;text-decoration:line-through}.sy-up .to{display:block;font-weight:700;color:#0b6479}.sy-up small{display:block;color:#5a6b7e}
.sy-backlink{border:0;background:none;color:#24508a;font:700 13.5px Montserrat,Arial,sans-serif;cursor:pointer;padding:0;margin:0 0 12px}
.sy-lh{display:flex;align-items:center;gap:14px;margin:0 0 14px}
.sy-lh h1{margin:0;font-size:clamp(20px,2.6vw,26px)}.sy-lh p{margin:2px 0 0;color:#5a6b7e}
.sy-lh>.sy-b{margin-left:auto}
.sy-lvl{display:grid;place-items:center;min-width:48px;height:48px;border-radius:14px;background:#0f1b2d;color:#fff;font-weight:800;font-size:15px;padding:0 8px}
.sy-intro{background:#eef6ff;border:1px solid #cfe0f5;border-radius:12px;padding:10px 16px;margin:0 0 14px}
.sy-intro p{margin:4px 0}
.sy-pt{background:#fff;border:1px solid var(--sy-line);border-radius:14px;padding:14px 18px;margin:0 0 14px}
.sy-pt h3{margin:0 0 8px;font-size:16.5px}.sy-pt p{margin:6px 0}
.sy-pt code,.sy-tip code{background:#f1f4f9;border-radius:4px;padding:0 4px}
.sy-exs{list-style:none;padding:0;margin:8px 0 0}
.sy-exs li{display:flex;gap:8px;align-items:flex-start;padding:5px 0;border-top:1px dashed #e3e8f0}
.sy-exs li:first-child{border-top:0}
.sy-say{flex:none;width:28px;height:28px;border-radius:50%;border:1px solid #c9d2df;background:#fff;display:inline-grid;place-items:center;cursor:pointer;vertical-align:middle;margin-right:6px;padding:0}
.sy-say svg{width:15px;height:15px;fill:none;stroke:#24508a;stroke-width:2}
.sy-say:hover{background:#eef4fb}
.sy-mists{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}
.sy-mist{background:var(--sy-soft);border-radius:10px;padding:8px 12px}
.sy-mist p{margin:2px 0}.sy-mist del{color:var(--sy-bad)}.sy-mist ins{color:var(--sy-ok);text-decoration:none;font-weight:700}.sy-mist small{color:#5a6b7e}
.sy-tip{background:#fff8e6;border:1px solid #f3d9a4;border-radius:14px;padding:14px 18px;margin:0 0 14px}
.sy-tip h3{margin:0 0 6px;font-size:16px}
.sy-q{display:flex;gap:10px;padding:12px 0;border-top:1px solid #eef1f6}
.sy-q:first-child{border-top:0}
.sy-qn{flex:none;width:26px;height:26px;border-radius:50%;background:#e8edf4;display:grid;place-items:center;font-weight:800;font-size:13px}
.sy-q.ok .sy-qn{background:var(--sy-ok);color:#fff}.sy-q.bad .sy-qn{background:var(--sy-bad);color:#fff}
.sy-qb{flex:1;min-width:0}.sy-qb>p{margin:2px 0 6px}
.sy-opts{display:flex;flex-direction:column;gap:4px}
.sy-opts label{display:flex;gap:8px;align-items:flex-start;cursor:pointer;padding:4px 8px;border-radius:8px}
.sy-opts label:hover{background:var(--sy-soft)}
.sy-row3{flex-direction:row;flex-wrap:wrap}
.sy-gap{border:0;border-bottom:2px solid #8aa0b8;background:#f6f9fd;padding:3px 6px;font:inherit;min-width:140px;width:auto;margin:0 4px}
.sy-fix,.sy-dict,.sy-spell{width:100%;border:1px solid #b9c4d2;border-radius:8px;padding:8px 10px;font:inherit}
.sy-fb{font-size:14px;margin-top:4px}.sy-fb .exp{margin:4px 0 0;color:#5a6b7e}
.sy-fb .exp p{margin:2px 0}
.sy-root b.ok,.sy-root span.ok,.sy-root p.ok,.sy-root small.ok{color:var(--sy-ok)}.sy-root b.bad,.sy-root span.bad,.sy-root small.bad{color:var(--sy-bad)}
.sa-edit p.ok{color:#1e7e34}
.sy-score{display:flex;align-items:center;gap:14px;flex-wrap:wrap;border-radius:14px;padding:12px 16px;margin:12px 0;border:1px solid var(--sy-line);background:#fff}
.sy-score b{font-size:26px}.sy-score span{font-weight:800;font-size:18px}.sy-score small{flex:1;min-width:200px;color:#5a6b7e}
.sy-score.ok{background:#eefaf3;border-color:#bfe6cf}.sy-score.mid{background:#fff8e6;border-color:#f3d9a4}.sy-score.bad{background:#fdeeee;border-color:#f3c4c4}
.sy-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:12px 0 0}
.sy-actions.center,.center{justify-content:center;text-align:center}
.sy-pn{display:flex;justify-content:space-between;gap:10px;margin:22px 0 0;flex-wrap:wrap}
.sy-pn .btn{max-width:48%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:inline-block}
.sy-words{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:10px}
.sy-word{background:#fff;border:1px solid var(--sy-line);border-radius:12px;padding:10px 14px}
.sy-ww{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.sy-ww b{font-size:16.5px}.sy-ww i{color:#6b7a8d;font-size:13px}
.sy-ipa{color:#6b5bd2;font-size:13.5px}
.sy-vi{margin:4px 0 2px;font-weight:700;color:#33445a}
.sy-wex{margin:2px 0;font-style:italic;color:#33445a;font-size:14px}
.sy-word .fine{margin:4px 0 0}
.sy-cardwrap{max-width:520px;margin:0 auto;text-align:center}
.sy-flash{background:#fff;border:2px solid #d5dde6;border-radius:20px;padding:30px 24px;min-height:200px;cursor:pointer;display:flex;flex-direction:column;justify-content:center;gap:10px;box-shadow:0 12px 30px -20px rgba(15,27,45,.5)}
.sy-flash.flip{border-color:var(--sy-acc)}
.sy-ff{display:flex;flex-direction:column;align-items:center;gap:6px}.sy-ff b{font-size:30px}
.sy-fbk{border-top:1px dashed #d5dde6;padding-top:10px}
.sy-quiz{max-width:620px;margin:0 auto}
.sy-qp{background:#fff;border:1px solid var(--sy-line);border-radius:14px;padding:18px;text-align:center;margin:0 0 10px}
.sy-big{font-size:26px}.sy-big2{font-size:18px;margin:0}
.sy-qopts{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.sy-qo{border:1px solid #c9d2df;background:#fff;border-radius:12px;padding:12px;font:600 14.5px Montserrat,Arial,sans-serif;cursor:pointer;text-align:left;color:#0f1b2d}
.sy-qo:hover:not(:disabled){border-color:#0f1b2d}
.sy-qo.ok{background:#e3f6ea;border-color:var(--sy-ok);color:#0f1b2d}.sy-qo.bad{background:#fdeaea;border-color:var(--sy-bad);color:#0f1b2d}
.sy-qex{background:var(--sy-soft);border-radius:12px;padding:10px 14px;margin:10px 0 0}.sy-qex p{margin:2px 0}
.sy-qrev p{margin:6px 0;padding:6px 10px;background:#fff;border-radius:8px;border:1px solid var(--sy-line)}
.sy-spell{max-width:360px;display:block;margin:10px auto;text-align:center;font-size:20px}
.sy-player{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:#fff;border:1px solid var(--sy-line);border-radius:14px;padding:12px 16px;margin:0 0 14px;position:sticky;top:48px;z-index:5}
.sy-player select{border:1px solid #c9d2df;border-radius:8px;padding:5px 6px;font:inherit}
.sy-player label{font-size:13.5px;font-weight:700}
.sy-dline{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:10px 0;border-top:1px solid #eef1f6}
.sy-dline .sy-dict{flex:1;min-width:220px;width:auto}
.sy-diff{flex-basis:100%;margin:2px 0 0 34px}
.sy-diff span.ok{background:#e3f6ea;border-radius:4px;padding:0 2px}.sy-diff span.bad{background:#fdeaea;border-radius:4px;padding:0 2px;font-weight:700}
.sy-tr{background:#fff;border:1px solid var(--sy-line);border-radius:14px;padding:10px 16px}
.sy-tr p{margin:6px 0;padding:2px 6px;border-radius:6px}.sy-tr p.on{background:#fff3c4}
.sy-chipsv{display:flex;flex-wrap:wrap;gap:6px}
.sy-chipsv>span{background:#fff;border:1px solid var(--sy-line);border-radius:10px;padding:4px 10px;font-size:13.5px}
.sy-vchip{display:flex;flex-direction:column;align-items:flex-start;text-align:left;border:1px solid #d5dde6;background:#fff;border-radius:10px;padding:5px 10px;cursor:pointer;font:inherit;color:inherit}
.sy-vchip:hover{border-color:#0f1b2d}.sy-vchip b{font-size:13.5px}.sy-vchip small{font-size:11.5px;color:#6b7a8d}
.sy-prompt{background:#fff;border:2px solid #0f1b2d;border-radius:14px;padding:12px 18px;margin:0 0 14px;font-size:15.5px}
.sy-prompt p{margin:4px 0}
.sy-wgrid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:16px;align-items:start}
.sy-guide details{background:#fff;border:1px solid var(--sy-line);border-radius:12px;padding:8px 14px;margin:0 0 10px}
.sy-guide summary{cursor:pointer;font-weight:800;padding:4px 0}
.sy-steps{padding-left:20px;margin:6px 0}.sy-steps li{margin:0 0 10px}.sy-steps p{margin:2px 0;font-size:14px;color:#33445a}
.sy-frame{display:flex;align-items:center;gap:8px;background:var(--sy-soft);border:1px dashed #b9c4d2;border-radius:8px;padding:5px 8px;font-style:italic;font-size:14px}
.sy-frame span{flex:1}
.sy-root .mini{border:1px solid #c9d2df;background:#fff;border-radius:7px;padding:3px 8px;font:700 12px Montserrat,Arial,sans-serif;cursor:pointer}
.sy-ideas{padding-left:18px;margin:6px 0;font-size:14px}.sy-ideas li{margin:0 0 4px}
.sy-check label{display:flex;gap:6px;font-weight:500 !important;font-size:14px;margin:4px 0}
.sy-editor{background:#fff;border:1px solid var(--sy-line);border-radius:14px;padding:14px 16px}
.sy-editor textarea{width:100%;border:1px solid #b9c4d2;border-radius:10px;padding:12px;font:16px/1.6 Georgia,"Times New Roman",serif;resize:vertical}
.sy-wc{display:flex;align-items:center;gap:12px;margin:6px 0 0;font-size:13.5px}.sy-wc .sy-bar{flex:1}
.sy-models{display:flex;flex-direction:column;gap:10px;margin:12px 0 0}
.sy-model{background:var(--sy-soft);border:1px solid var(--sy-line);border-radius:12px;padding:10px 14px}.sy-model p{margin:6px 0;font-size:14.5px}
.sy-wait{display:flex;align-items:center;gap:10px;padding:14px;background:#eef6ff;border-radius:12px;margin:12px 0 0}
.sy-spin{width:18px;height:18px;border:3px solid #b9d3f0;border-top-color:#24508a;border-radius:50%;animation:syspin .9s linear infinite;flex:none}
@keyframes syspin{to{transform:rotate(360deg)}}
.sy-cue{background:#fffdf3;border:2px solid #e5d27a;border-radius:14px;padding:12px 16px;margin:0 0 12px}
.sy-cue ul{margin:4px 0;padding-left:20px}.sy-cue p{margin:4px 0}
.sy-notes,.sy-trans{width:100%;border:1px solid #c9d2df;border-radius:8px;padding:8px;font:14px/1.5 Arial,sans-serif;margin-top:6px}
.sy-sq{border-top:1px solid #eef1f6;padding:10px 0}.sy-sq:first-of-type{border-top:0}.sy-sq>p{margin:2px 0 6px;display:flex;align-items:center;gap:4px}
.sy-recrow{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.sy-recrow audio{height:34px;max-width:260px}
.sy-root .btn.rec{background:var(--sy-bad);border-color:var(--sy-bad);color:#fff;animation:sypulse 1.2s ease-in-out infinite}
@keyframes sypulse{50%{box-shadow:0 0 0 6px rgba(198,40,40,.18)}}
.sy-timer{font:700 14px/1 ui-monospace,Menlo,Consolas,monospace;color:#33445a}
.sy-root .aifb{margin-top:14px}
/* Thẻ trên trang chính IELTS */
.sy-promo{display:flex;align-items:center;gap:16px;width:100%;text-align:left;border:0;border-radius:18px;padding:16px 20px;margin:0 0 18px;cursor:pointer;color:#fff;font-family:Montserrat,"Segoe UI",system-ui,Arial,sans-serif;background:linear-gradient(120deg,#5b3fd1,#0e8fa6);box-shadow:0 12px 28px -16px rgba(43,31,120,.7)}
.sy-promo:hover{filter:brightness(1.06)}
.sy-pi{flex:none;width:52px;height:52px;border-radius:14px;background:rgba(255,255,255,.18);display:grid;place-items:center;font-weight:800;font-size:16px}
.sy-ptx{flex:1;min-width:0}.sy-ptx b{display:block;font-size:19px;font-weight:800}.sy-ptx small{display:block;color:#e2e9ff;font-size:13px;font-weight:600}
.sy-pgo{flex:none;background:#fff;color:#2b1f78;border-radius:10px;padding:8px 14px;font-weight:800;font-size:14px}
/* Quản trị (Class & tools › Study) */
.sa-table{width:100%;border-collapse:collapse;font-size:14px;background:#fff}
.sa-table th,.sa-table td{border-bottom:1px solid #e3e8f0;padding:8px;text-align:left;vertical-align:top}
.sa-table th{background:#f6f8fc;font-size:12.5px}
.sa-act{white-space:nowrap}.sa-act .mini{margin:0 2px 2px 0}
.sa-edit textarea{width:100%;font:13px/1.45 ui-monospace,Menlo,Consolas,monospace;border:1px solid #b9c4d2;border-radius:8px;padding:10px;margin-top:8px;tab-size:2}
.sa-gen,.sa-edit{margin:0 0 14px}
.sy-pv{background:#f4f6fb;padding:6px;border-radius:10px;max-height:72vh;overflow:auto}
.sy-pv .sy-main{padding:10px !important}
.sy-pv .sy-player{position:static}
@media (max-width:820px){
  .sy-wgrid{grid-template-columns:1fr}
  .sy-qopts{grid-template-columns:1fr}
  .sy-promo{flex-wrap:wrap}.sy-pgo{margin-left:68px}
  .sy-hero{padding:18px}
  .sy-exit{padding:7px 9px;font-size:12px}
  .hm-top .bt{display:none}
}

/* Biểu đồ / bảng / sơ đồ của đề Viết */
.sy-charts{margin:0 0 14px}
.sy-charts .chartbox{margin:0 0 12px;border-radius:12px;border-color:var(--sy-line);padding:10px}
.sy-charts .chartbox svg{min-width:500px}
.sy-flow{display:flex;flex-wrap:wrap;gap:26px 30px;list-style:none;counter-reset:st;margin:18px 6px 6px;padding:0 28px 0 0}
.sy-flow li{position:relative;flex:1 1 150px;max-width:200px;min-height:70px;display:flex;align-items:center;justify-content:center;text-align:center;border:2px solid #1f4e79;border-radius:12px;padding:20px 10px 10px;background:#f2f7fc;font-size:14px;line-height:1.35}
.sy-flow li::before{counter-increment:st;content:counter(st);position:absolute;top:-13px;left:50%;transform:translateX(-50%);width:26px;height:26px;border-radius:50%;background:#1f4e79;color:#fff;font-weight:800;font-size:13px;display:grid;place-items:center}
.sy-flow li:not(:last-child)::after{content:"➜";position:absolute;right:-25px;top:50%;transform:translateY(-50%);color:#1f4e79;font-size:18px}
.sy-cyc{margin:6px;font-weight:700;color:#1f4e79;font-size:14px}
.sy-maps{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;padding:4px}
.sy-map{margin:0}
.sy-map figcaption{text-align:center;font-weight:800;margin:0 0 6px}
.sy-mapgrid{position:relative;display:grid;grid-template-columns:repeat(3,1fr);grid-auto-rows:minmax(74px,auto);gap:8px;background:#c9ced6;border:3px solid #8a949e;border-radius:6px;padding:8px}
.sy-mapgrid .mc{display:grid;place-items:center;text-align:center;font-size:12.5px;font-weight:700;padding:6px;border-radius:4px;background:#e4ebf5;color:#1b2a3d}
.sy-mapgrid .mc.empty{background:#eef0f3}
.sy-mapgrid .mc.t-g{background:#cfe8c4;color:#22501a}.sy-mapgrid .mc.t-h{background:#f3e3c9;color:#6b4513}.sy-mapgrid .mc.t-w{background:#cde6f5;color:#0f4c75}.sy-mapgrid .mc.t-r{background:#e0e0e0;color:#333}
.sy-compass{position:absolute;top:-12px;right:-10px;background:#0f1b2d;color:#fff;border-radius:99px;padding:2px 7px;font-size:11px;font-weight:800}
@media (max-width:560px){.sy-flow{row-gap:40px;padding-right:0}.sy-flow li{max-width:none;flex-basis:100%}.sy-flow li:not(:last-child)::after{content:"⬇";right:auto;left:50%;top:auto;bottom:-29px;transform:translateX(-50%);font-size:14px}}
/* Trạng thái bài theo tài khoản (04/10/2026): Chưa làm · Đã xem · Đã làm · Kết quả */
.sy-st{display:inline-flex;align-items:center;gap:3px;border-radius:99px;padding:2px 9px;font-size:12px;font-weight:800;white-space:nowrap;line-height:1.5;border:1px solid transparent}
.sy-st.none{background:#fff;color:#8a97a8;border-color:#dfe5ee;font-weight:700}
.sy-st.seen{background:#e8f1fb;color:#24508a}
.sy-st.done{background:#f3ebfd;color:#6b3fb5}
.sy-st.ok{background:#e3f6ea;color:var(--sy-ok,#1e8e4f)}
.sy-st.mid{background:#fff3dc;color:var(--sy-mid,#b7791f)}
.sy-toph{display:flex;align-items:flex-start;justify-content:space-between;gap:8px}
.sy-toph .sy-st{flex:none;margin-top:1px}
.sy-stchips{margin-top:-4px}
.sy-stchips small{opacity:.7;font-weight:700;margin-left:2px}
.sy-dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:5px;vertical-align:1px;background:#cfd8e3}
.sy-dot.seen{background:#4a7fc1}.sy-dot.did{background:#1e8e4f}.sy-dot.none{background:#fff;border:1.5px solid #aab6c5;width:7px;height:7px}
.sa-les{border-top:1px solid #eef1f6;padding:6px 0}
.sa-les summary{cursor:pointer;padding:4px 0}
.sa-les .sa-table{margin:6px 0 4px;width:100%}
@media (max-width:560px){.sy-rb{flex-wrap:wrap;justify-content:flex-end;max-width:46%}.sy-st{font-size:11.5px;padding:2px 7px}}

/* Dải đầu trang Study – cùng kiểu hero tối với IELTS / TOEFL / Aptis / VSTEP */
.sy-top{padding:28px 0 30px}
.sy-top .ex{display:inline-block;margin-bottom:10px;font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#9fb3cf}
.sy-top .sy-kpis:empty{display:none}
@media (max-width:640px){.sy-top{padding:20px 0 22px}.sy-top .sy-kpis div{min-width:0;flex:1}}