:root{--edmova-navy-900:#0d2535;--edmova-navy-700:#173a4b;--edmova-teal-500:#16a89b;--edmova-teal-700:#087d74;--edmova-gold-500:#d69e50;--edmova-cloud:#f5f7f6;--edmova-white:#fff;--edmova-ink:#162a3b;--edmova-secondary:#526473;--edmova-border:#dce5e6;--edmova-success:#187b59;--edmova-warning:#a8640c;--edmova-error:#b33d42;--edmova-font-sans:"Be Vietnam Pro", Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;--edmova-font-mono:"JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;--edmova-radius-sm:8px;--edmova-radius-md:12px;--edmova-radius-lg:18px;--edmova-shadow-card:0 10px 30px #0d253514;--tint-teal:#16a89b1a;--tint-teal-strong:#16a89b2e;--tint-gold:#d69e5029;--tint-warning:#a8640c17;--tint-error:#b33d4212;--tint-success:#187b5914;--tint-navy:#0d25350d;--bg:var(--edmova-cloud);--surface:var(--edmova-white);--text:var(--edmova-ink);--text-2:var(--edmova-secondary);--line:var(--edmova-border);--primary:var(--edmova-teal-700);--link:var(--edmova-teal-700);--focus:var(--edmova-teal-500);--nav-bg:var(--edmova-navy-900);--nav-fg:var(--edmova-white);--nav-fg-2:#ffffffb8;--nav-active-bg:#16a89b2e;--nav-active-fg:var(--edmova-white);--logo-step3:var(--edmova-white);--logo-word:var(--edmova-white);--hero-bg:var(--edmova-navy-700);--hero-fg:var(--edmova-white);--hero-fg-2:#ffffffc7;--hero-accent:var(--edmova-teal-500);--hero-border:transparent;--card-radius:var(--edmova-radius-md);--card-shadow:none;--card-border:1px solid var(--edmova-border);--s1:4px;--s2:8px;--s3:12px;--s4:16px;--s5:20px;--s6:24px;--s8:32px;--s10:40px;--s12:48px;--nav-h:64px;--tabbar-h:64px;--color-primary-teal:var(--edmova-teal-500);--color-primary-teal-hover:var(--edmova-teal-700);--color-primary-teal-light:var(--tint-teal);--color-brand-navy:var(--edmova-navy-900);--color-brand-navy-secondary:var(--edmova-navy-700);--color-brand-navy-muted:var(--edmova-secondary);--color-accent-gold:var(--edmova-gold-500);--color-accent-gold-light:var(--tint-gold);--color-bg-surface:var(--edmova-cloud);--color-bg-card:var(--edmova-white);--color-border-subtle:var(--edmova-border);--color-text-primary:var(--edmova-ink);--color-text-secondary:var(--edmova-secondary);--color-status-correct:var(--edmova-success);--color-status-incorrect:var(--edmova-error);--color-status-partial:var(--edmova-warning);--font-sans:var(--edmova-font-sans);--font-mono:var(--edmova-font-mono)}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);font-family:var(--edmova-font-sans);-webkit-font-smoothing:antialiased;margin:0;font-size:16px;line-height:1.6}h1,h2,h3,h4{color:var(--edmova-navy-900);letter-spacing:-.01em;margin:0;line-height:1.25}h1{font-size:clamp(26px,3.2vw,34px);font-weight:700}h2{font-size:clamp(20px,2.2vw,24px);font-weight:700}h3{font-size:18px;font-weight:600}p{margin:0}a{color:var(--link);text-underline-offset:3px;text-decoration:underline}a:hover{text-decoration-thickness:2px}[hidden]{display:none!important}:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}.num{font-variant-numeric:tabular-nums}.muted{color:var(--text-2)}.small{font-size:14px}.xsmall{font-size:13px}.sr-only{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.icon{fill:none;stroke:currentColor;stroke-width:1.9px;stroke-linecap:round;stroke-linejoin:round;flex:none;width:20px;height:20px}.icon-sm{width:16px;height:16px}.icon-lg{width:28px;height:28px}.stack>*+*{margin-top:var(--s4)}.row{align-items:center;gap:var(--s3);display:flex}.row-between{justify-content:space-between;align-items:center;gap:var(--s3);display:flex}.wrap{flex-wrap:wrap}.logo{color:var(--logo-word);align-items:center;gap:10px;text-decoration:none;display:inline-flex}.logo svg{width:auto;height:32px}.logo .step3{fill:var(--logo-step3)}.logo-word{letter-spacing:-.02em;font-size:22px;font-weight:800;line-height:1}.logo-word i{background:var(--edmova-teal-500);border-radius:50%;width:6px;height:6px;margin-left:2px;display:inline-block}.btn,.btn-primary,.btn-secondary{justify-content:center;align-items:center;gap:var(--s2);border-radius:var(--edmova-radius-sm);min-height:44px;font:inherit;cursor:pointer;border:1px solid #0000;padding:10px 20px;font-size:15px;font-weight:600;line-height:1.2;text-decoration:none;transition:background .15s,border-color .15s,color .15s;display:inline-flex}.btn-primary{background:var(--edmova-teal-700);color:var(--edmova-white)}.btn-primary:hover:not(:disabled){background:var(--edmova-navy-700)}.btn-secondary{background:var(--surface);color:var(--edmova-navy-900);border-color:var(--edmova-border)}.btn-secondary:hover:not(:disabled){border-color:var(--edmova-navy-900)}.btn-ghost{color:var(--link);background:0 0;padding-inline:12px}.btn-ghost:hover:not(:disabled){background:var(--tint-teal)}.btn-on-dark{background:var(--edmova-white);color:var(--edmova-navy-900)}.btn-on-dark:hover:not(:disabled){background:var(--edmova-cloud)}.btn-sm{min-height:36px;padding:6px 12px;font-size:13.5px}.btn-lg{min-height:52px;padding:14px 24px;font-size:16px}.btn-block{width:100%}.btn[disabled],.btn[aria-disabled=true],button:disabled.btn{background:var(--edmova-border);color:var(--edmova-secondary);cursor:not-allowed;border-color:#0000}.spinner{border:2px solid #fff6;border-top-color:currentColor;border-radius:50%;width:16px;height:16px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.badge,.badge-gold{white-space:nowrap;border-radius:999px;align-items:center;gap:4px;padding:2px 10px;font-size:12.5px;font-weight:600;line-height:1.6;display:inline-flex}.badge-free,.badge-gold{background:var(--tint-gold);color:var(--edmova-navy-900);border:1px solid var(--edmova-gold-500)}.badge-teal{background:var(--tint-teal);color:var(--edmova-teal-700)}.badge-neutral{background:var(--tint-navy);color:var(--edmova-secondary)}.badge-warning{background:var(--tint-warning);color:var(--edmova-warning)}.badge-ref{color:var(--edmova-secondary);border:1px dashed var(--edmova-secondary);background:0 0}.on-dark .badge-ref{color:var(--hero-fg-2);border-color:var(--hero-fg-2)}.field{gap:6px;display:grid}.field+.field{margin-top:var(--s4)}.label{color:var(--edmova-navy-900);font-size:14px;font-weight:600}.label-row{justify-content:space-between;align-items:baseline;gap:var(--s2);display:flex}.hint{color:var(--text-2);font-size:13px}.input{border:1px solid var(--edmova-border);border-radius:var(--edmova-radius-sm);background:var(--edmova-white);width:100%;min-height:48px;color:var(--text);font:inherit;padding:12px 14px}.input::placeholder{color:var(--edmova-secondary);opacity:.8}.input:hover{border-color:var(--edmova-secondary)}.input:focus{border-color:var(--edmova-teal-700);box-shadow:0 0 0 3px var(--tint-teal-strong);outline:none}.input[readonly]{background:var(--edmova-cloud)}.alert{gap:var(--s3);padding:var(--s3) var(--s4);border-radius:var(--edmova-radius-sm);border:1px solid;align-items:flex-start;font-size:14.5px;line-height:1.5;display:flex}.alert .icon{margin-top:1px}.alert strong{color:inherit;display:block}.alert-info{background:var(--tint-teal);color:var(--edmova-navy-900);border-color:#087d7459}.alert-info .icon{color:var(--edmova-teal-700)}.alert-warning{background:var(--tint-warning);color:var(--edmova-ink);border-color:#a8640c66}.alert-warning .icon{color:var(--edmova-warning)}.alert-error{background:var(--tint-error);color:var(--edmova-ink);border-color:#b33d4266}.alert-error .icon{color:var(--edmova-error)}.alert-success{background:var(--tint-success);color:var(--edmova-ink);border-color:#187b5966}.alert-success .icon{color:var(--edmova-success)}.alert .alert-actions{margin-top:var(--s2);gap:var(--s2);flex-wrap:wrap;display:flex}.card,.edmova-card{background:var(--surface);border:var(--card-border);border-radius:var(--card-radius);box-shadow:var(--card-shadow);padding:var(--s6)}.card-head{justify-content:space-between;align-items:flex-start;gap:var(--s3);margin-bottom:var(--s4);display:flex}.card-head p{color:var(--text-2);margin-top:2px;font-size:14px}.progress{background:var(--tint-navy);border-radius:999px;height:10px;overflow:hidden}.progress>span{border-radius:inherit;background:var(--edmova-teal-700);height:100%;display:block}.backdrop{z-index:60;padding:var(--s10) var(--s4);overscroll-behavior:contain;background:#0d25359e;justify-content:center;align-items:flex-start;display:flex;position:fixed;inset:0;overflow-y:auto}dialog.modal-dialog{background:0 0;border:0;width:calc(100% - 32px);max-width:640px;margin:auto;padding:0}dialog.modal-dialog:modal{overscroll-behavior:contain}dialog.modal-dialog::backdrop{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);overscroll-behavior:contain;background:#0d25359e;overflow:hidden}.modal{background:var(--surface);border-radius:var(--edmova-radius-lg);width:100%;max-width:640px;color:var(--text);box-shadow:0 30px 80px #0d253559}.modal-sm{max-width:480px}.modal-head{padding:var(--s6) var(--s6) 0;justify-content:space-between;gap:var(--s3);align-items:flex-start;display:flex}.modal-head .eyebrow{text-transform:uppercase;letter-spacing:.05em;color:var(--edmova-teal-700);font-size:13px;font-weight:600}.modal-body{padding:var(--s5) var(--s6)}.modal-foot{padding:var(--s4) var(--s6) var(--s6);gap:var(--s3);flex-wrap:wrap;justify-content:flex-end;display:flex}.icon-btn{width:40px;height:40px;color:var(--text-2);cursor:pointer;background:0 0;border:0;border-radius:8px;flex:none;place-items:center;display:grid}.icon-btn:hover{background:var(--tint-navy);color:var(--edmova-navy-900)}.quota-table{border-collapse:collapse;width:100%;margin-top:var(--s3);font-size:15px}.quota-table th,.quota-table td{padding:10px var(--s2);border-bottom:1px solid var(--edmova-border);text-align:right}.quota-table th:first-child,.quota-table td:first-child{text-align:left}.quota-table th{color:var(--text-2);font-size:13px;font-weight:600}.confirm-box{margin-top:var(--s4);padding:var(--s4);border-radius:var(--edmova-radius-sm);border:1px solid var(--edmova-warning);background:var(--tint-warning)}.player-page{background:var(--edmova-cloud);flex-direction:column;min-height:100vh;display:flex}.ptop{z-index:30;background:var(--edmova-navy-900);color:var(--edmova-white);position:sticky;top:0}.ptop-inner{max-width:1280px;min-height:var(--nav-h);padding:8px var(--s6);align-items:center;gap:var(--s4);flex-wrap:wrap;margin:0 auto;display:flex}.ptop .icon-btn{color:#fffc;text-decoration:none}.ptop .icon-btn:hover{color:var(--edmova-white);background:#ffffff1a}.ptop-title{min-width:0;line-height:1.3}.ptop-title b{white-space:nowrap;text-overflow:ellipsis;color:var(--edmova-white);font-size:15px;display:block;overflow:hidden}.ptop-title small{color:#ffffffb8;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;display:flex}.ptop-right{align-items:center;gap:var(--s3);flex-wrap:wrap;margin-left:auto;display:flex}.mode-switch-group{background:#ffffff1a;border-radius:999px;gap:2px;padding:3px;display:inline-flex}.mode-switch-btn{color:#ffffffbf;cursor:pointer;background:0 0;border:0;border-radius:999px;padding:5px 12px;font-size:12.5px;font-weight:600;transition:background .15s,color .15s}.mode-switch-btn[aria-pressed=true]{background:var(--edmova-teal-500);color:var(--edmova-navy-900);font-weight:700}.sync{color:#ffffffd9;white-space:nowrap;align-items:center;gap:6px;font-size:13.5px;display:inline-flex}.sync .icon{width:16px;height:16px}.sync.ok .icon{color:var(--edmova-teal-500)}.sync.off{color:var(--edmova-gold-500)}.timer{font-variant-numeric:tabular-nums;background:#ffffff1f;border-radius:999px;align-items:center;gap:6px;padding:6px 12px;font-size:14px;font-weight:600;display:inline-flex}.ptop-progress{background:#ffffff1f;height:4px}.ptop-progress span{background:var(--edmova-teal-500);height:100%;transition:width .25s;display:block}.player{width:100%;max-width:1280px;padding:var(--s6);gap:var(--s6);flex:1;grid-template-columns:minmax(0,1fr) 310px;align-items:start;margin:0 auto;display:grid}.qcard{background:var(--surface);border:1px solid var(--edmova-border);border-radius:var(--edmova-radius-md);padding:var(--s8);box-shadow:var(--edmova-shadow-card)}.qmeta{gap:var(--s2);color:var(--text-2);margin-bottom:var(--s4);flex-wrap:wrap;align-items:center;font-size:14px;display:flex}.qmeta-right{align-items:center;gap:var(--s2);margin-left:auto;display:flex}.flag-btn{border:1px solid var(--edmova-border);background:var(--surface);color:var(--text-2);cursor:pointer;border-radius:999px;align-items:center;gap:6px;padding:6px 12px;font-size:13px;font-weight:600;transition:all .15s;display:inline-flex}.flag-btn:hover{border-color:var(--edmova-gold-500);color:var(--edmova-navy-900)}.flag-btn.is-flagged{background:var(--tint-gold);border-color:var(--edmova-gold-500);color:var(--edmova-navy-900)}.qstem{color:var(--text);white-space:pre-line;font-size:18px;line-height:1.7}.qinstr{margin-top:var(--s3);color:var(--edmova-teal-700);flex-wrap:wrap;align-items:center;gap:8px;font-size:14.5px;font-weight:600;display:flex}.options{margin:var(--s5) 0 0;gap:var(--s3);padding:0;list-style:none;display:grid}.opt{position:relative}.opt input{opacity:0;width:1px;height:1px;position:absolute}.opt label{gap:var(--s3);min-height:56px;padding:var(--s3) var(--s4);cursor:pointer;border:1px solid var(--edmova-border);border-radius:var(--edmova-radius-sm);background:var(--surface);grid-template-columns:36px 1fr auto;align-items:start;font-size:16px;line-height:1.55;transition:border-color .15s,background .15s,box-shadow .15s;display:grid}.opt .key{border:1px solid var(--edmova-border);width:32px;height:32px;color:var(--edmova-navy-900);background:var(--edmova-cloud);border-radius:8px;place-items:center;font-size:14px;font-weight:700;display:grid}.opt .verdict{white-space:nowrap;align-items:center;gap:4px;padding-top:4px;font-size:13px;font-weight:700;display:none}.opt label:hover{border-color:var(--edmova-secondary)}.opt input:focus-visible+label{outline:3px solid var(--focus);outline-offset:2px}.opt.is-selected label{border-color:var(--edmova-teal-700);background:var(--tint-teal);box-shadow:inset 0 0 0 1px var(--edmova-teal-700)}.opt.is-selected .key{background:var(--edmova-teal-700);border-color:var(--edmova-teal-700);color:var(--edmova-white)}.opt input:disabled+label{cursor:default}.opt input:disabled+label:hover{border-color:var(--edmova-border)}.opt.is-correct label{border-color:var(--edmova-success);background:var(--tint-success);box-shadow:inset 0 0 0 1px var(--edmova-success)}.opt.is-correct .key{background:var(--edmova-success);border-color:var(--edmova-success);color:var(--edmova-white)}.opt.is-correct .verdict.v-correct{color:var(--edmova-success);display:inline-flex}.opt.is-wrong label{border-color:var(--edmova-error);background:var(--tint-error);box-shadow:inset 0 0 0 1px var(--edmova-error)}.opt.is-wrong .key{background:var(--edmova-error);border-color:var(--edmova-error);color:var(--edmova-white)}.opt.is-wrong .verdict.v-wrong{color:var(--edmova-error);display:inline-flex}.opt.is-checkbox .key{border-radius:6px}.opt-feedback{color:var(--text-2);background:#0d25350a;border-radius:6px;grid-column:2/-1;margin-top:6px;padding:8px 12px;font-size:13.5px}.match-wrap{margin-top:var(--s5);gap:var(--s4);display:grid}.match-grid{gap:var(--s5);grid-template-columns:minmax(0,5fr) minmax(0,7fr);align-items:start;display:grid}.match-col{gap:var(--s3);display:grid}.match-col-head{text-transform:uppercase;letter-spacing:.05em;color:var(--edmova-secondary);border-bottom:1px solid var(--edmova-border);padding-bottom:4px;font-size:13px;font-weight:700}.match-stem-card{padding:var(--s3) var(--s4);border-radius:var(--edmova-radius-sm);border:1px solid var(--edmova-border);background:var(--surface);gap:var(--s2);cursor:pointer;text-align:left;font:inherit;width:100%;transition:border-color .15s,background .15s,box-shadow .15s;display:grid}.match-stem-card:hover:not(:disabled){border-color:var(--edmova-secondary)}.match-stem-card.is-active{border-color:var(--edmova-teal-700);background:var(--tint-teal);box-shadow:0 0 0 2px var(--tint-teal-strong)}.match-stem-card.is-paired{border-color:var(--edmova-navy-700);background:var(--edmova-cloud)}.match-stem-card.is-correct{border-color:var(--edmova-success);background:var(--tint-success)}.match-stem-card.is-wrong{border-color:var(--edmova-error);background:var(--tint-error)}.match-stem-top{justify-content:space-between;align-items:center;gap:var(--s2);display:flex}.match-stem-idx{background:var(--edmova-navy-900);width:26px;height:26px;color:var(--edmova-white);border-radius:6px;flex:none;justify-content:center;align-items:center;font-size:12.5px;font-weight:700;display:inline-flex}.match-stem-title{color:var(--edmova-navy-900);flex:1;font-size:15.5px;font-weight:600}.match-assigned-box{background:var(--surface);border:1px dashed var(--edmova-border);color:var(--text-2);justify-content:space-between;align-items:center;gap:var(--s2);border-radius:6px;padding:8px 10px;font-size:14px;display:flex}.match-stem-card.is-paired .match-assigned-box{border-style:solid;border-color:var(--edmova-teal-700);color:var(--edmova-ink);font-weight:500}.match-choice-btn{padding:var(--s3) var(--s4);border-radius:var(--edmova-radius-sm);border:1px solid var(--edmova-border);background:var(--surface);gap:var(--s3);text-align:left;font:inherit;cursor:pointer;grid-template-columns:32px 1fr auto;align-items:start;width:100%;font-size:15px;line-height:1.5;transition:border-color .15s,background .15s;display:grid}.match-choice-btn:hover:not(:disabled){border-color:var(--edmova-teal-700);background:var(--tint-teal)}.match-choice-btn.is-used{background:var(--edmova-cloud);border-color:var(--edmova-secondary);color:var(--text-2)}.match-choice-key{border:1px solid var(--edmova-border);background:var(--edmova-cloud);width:28px;height:28px;color:var(--edmova-navy-900);border-radius:6px;place-items:center;font-size:13px;font-weight:700;display:grid}.num-wrap{margin-top:var(--s5);padding:var(--s5);border-radius:var(--edmova-radius-md);border:1px solid var(--edmova-border);background:var(--edmova-cloud);gap:var(--s4);max-width:540px;display:grid}.num-input-row{gap:var(--s3);flex-wrap:wrap;align-items:center;display:flex}.num-input{min-width:200px;height:56px;font-family:var(--edmova-font-mono);color:var(--edmova-navy-900);background:var(--surface);border:2px solid var(--edmova-border);border-radius:var(--edmova-radius-sm);flex:1;padding:12px 16px;font-size:22px;font-weight:700}.num-input:focus{border-color:var(--edmova-teal-700);box-shadow:0 0 0 3px var(--tint-teal-strong);outline:none}.num-input.is-correct{border-color:var(--edmova-success);background:var(--tint-success)}.num-input.is-wrong{border-color:var(--edmova-error);background:var(--tint-error)}.num-unit-badge{border-radius:var(--edmova-radius-sm);background:var(--surface);border:1px solid var(--edmova-border);color:var(--edmova-secondary);padding:10px 14px;font-size:14px;font-weight:600}.num-pad{grid-template-columns:repeat(4,1fr);gap:8px;display:grid}.num-key{border-radius:var(--edmova-radius-sm);border:1px solid var(--edmova-border);background:var(--surface);min-height:44px;font-family:var(--edmova-font-mono);color:var(--edmova-navy-900);cursor:pointer;font-size:16px;font-weight:700;transition:background .12s,border-color .12s}.num-key:hover:not(:disabled){border-color:var(--edmova-teal-700);background:var(--tint-teal)}.num-key:disabled{opacity:.5;cursor:not-allowed}.qactions{align-items:center;gap:var(--s3);margin-top:var(--s6);padding-top:var(--s5);border-top:1px 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