:root{font-family:Microsoft YaHei,PingFang SC,system-ui,-apple-system,sans-serif;color:#183044;background:#f5f7f8;font-synthesis:none;text-rendering:optimizeLegibility;--navy-950: #102f43;--navy-900: #143a52;--navy-800: #1a4a67;--navy-700: #28627f;--navy-100: #e7f0f4;--teal-700: #26736b;--teal-100: #e7f3f1;--amber-700: #a76313;--amber-100: #fff1da;--red-700: #b84949;--red-100: #fdecec;--green-700: #2f795e;--green-100: #e7f4ee;--ink: #183044;--muted: #657684;--line: #dfe6ea;--soft: #f5f7f8;--surface: #ffffff;--sidebar: 244px;--shadow: 0 4px 20px rgb(16 47 67 / .06)}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{margin:0;min-width:320px;min-height:100vh;background:#f5f7f8;overscroll-behavior-y:none}button,input,select,textarea{font:inherit}button{color:inherit;touch-action:manipulation;-webkit-tap-highlight-color:transparent}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid rgb(40 98 127 / .2);outline-offset:2px}button:disabled{cursor:not-allowed;opacity:.48}p,h1,h2,h3{margin-top:0}.app-shell{min-height:100vh}.sidebar{position:fixed;z-index:40;inset:0 auto 0 0;width:var(--sidebar);display:flex;flex-direction:column;padding:24px 16px 20px;color:#dfeaf0;background:var(--navy-950)}.brand{display:flex;align-items:center;gap:11px;padding:0 8px 28px}.brand-mark{display:grid;width:38px;height:38px;place-items:center;flex:0 0 auto;border-radius:10px;color:var(--navy-950);background:#e8f0e9;font-size:19px;font-weight:700}.brand div{min-width:0}.brand strong,.brand small{display:block}.brand strong{overflow:hidden;color:#fff;font-size:15px;white-space:nowrap}.brand small{margin-top:2px;color:#91a7b4;font-size:11px}.mobile-close{display:none;margin-left:auto;border:0;color:#fff;background:transparent}.sidebar nav{display:grid;gap:5px}.sidebar nav button{display:flex;min-height:45px;align-items:center;gap:12px;padding:0 12px;border:0;border-radius:9px;color:#adc0cb;background:transparent;cursor:pointer;text-align:left;transition:color .16s ease,background .16s ease}.sidebar nav button:hover{color:#fff;background:#ffffff12}.sidebar nav button.active{color:#fff;background:#1d4a63;box-shadow:inset 3px 0 #9ec8ba}.sidebar nav button i{min-width:25px;margin-left:auto;padding:2px 6px;border-radius:10px;color:#c7d6dd;background:#ffffff1a;font-size:11px;font-style:normal;text-align:center}.sidebar-tip{margin-top:auto;padding:15px;border:1px solid rgb(255 255 255 / .1);border-radius:10px;background:#ffffff0b}.sidebar-tip span,.sidebar-tip strong,.sidebar-tip p{display:block}.sidebar-tip span{margin-bottom:6px;color:#8ca5b2;font-size:10px;letter-spacing:.12em}.sidebar-tip strong{color:#ecf4f6;font-size:13px}.sidebar-tip p{margin:5px 0 0;color:#91a7b4;font-size:11px;line-height:1.55}.main-content{min-height:100vh;margin-left:var(--sidebar)}.topbar{position:sticky;z-index:25;top:0;display:flex;min-height:78px;align-items:center;gap:14px;padding:14px 32px;border-bottom:1px solid #e6ebee;background:#fffffff0;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.topbar h1{margin:0;color:var(--navy-950);font-size:21px;letter-spacing:-.02em}.topbar p{margin:2px 0 0;color:var(--muted);font-size:12px}.topbar-copy{min-width:0}.topbar-actions{display:flex;align-items:center;gap:8px;margin-left:auto}.menu-button{display:none;width:38px;height:38px;place-items:center;border:1px solid var(--line);border-radius:9px;background:#fff}.quick-add{display:flex;min-height:38px;align-items:center;gap:7px;margin-left:0;padding:0 14px;border:1px solid #ccd9df;border-radius:8px;color:var(--navy-900);background:#fff;cursor:pointer;font-size:13px;font-weight:600}.install-app{display:inline-flex;min-height:38px;align-items:center;gap:7px;padding:0 13px;border:1px solid #bdd4cf;border-radius:8px;color:var(--teal-700);background:var(--teal-100);cursor:pointer;font-size:12px;font-weight:700}.install-app:hover{border-color:#8cb9af;background:#dceeea}.quick-add:hover{border-color:var(--navy-700);background:#f8fbfc}.page-container{width:min(1280px,100%);margin:0 auto;padding:28px 32px 64px}.page-stack{display:grid;gap:20px}.panel{border:1px solid #e0e7ea;border-radius:13px;background:var(--surface);box-shadow:var(--shadow)}.panel-heading,.section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.panel-heading h3,.section-heading h3{margin:2px 0 0;color:var(--navy-950);font-size:17px}.panel-heading p{margin:5px 0 0;color:var(--muted);font-size:12px;line-height:1.6}.eyebrow{color:var(--teal-700);font-size:10px;font-weight:700;letter-spacing:.12em;text-transform:uppercase}.button{display:inline-flex;min-height:39px;align-items:center;justify-content:center;gap:8px;padding:0 16px;border:1px solid transparent;border-radius:8px;cursor:pointer;font-size:13px;font-weight:600;transition:transform .14s ease,box-shadow .14s ease,background .14s ease}.button:not(:disabled):active{transform:translateY(1px)}.button.primary{color:#fff;background:var(--navy-900);box-shadow:0 4px 12px #143a5229}.button.primary:hover:not(:disabled){background:var(--navy-800);box-shadow:0 6px 18px #143a5233}.button.secondary{border-color:#d3dee3;color:var(--navy-900);background:#fff}.button.secondary:hover:not(:disabled){border-color:#adc2cd;background:#f7fafb}.button.danger{color:#fff;background:var(--red-700)}.button.large{min-height:47px;padding-inline:22px;font-size:14px}.icon-button{display:inline-grid;width:35px;height:35px;place-items:center;border:1px solid var(--line);border-radius:8px;color:var(--navy-700);background:#fff;cursor:pointer}.icon-button:hover{background:var(--soft)}.icon-button.danger{color:var(--red-700)}.text-button,.back-button{display:inline-flex;align-items:center;gap:6px;padding:0;border:0;color:var(--navy-700);background:transparent;cursor:pointer;font-size:12px;font-weight:600}.back-button{width:fit-content;font-size:13px}.focus-hero{position:relative;display:grid;min-height:252px;grid-template-columns:1.25fr .75fr;gap:32px;overflow:hidden;padding:36px 40px;border-radius:15px;color:#fff;background:var(--navy-900);box-shadow:0 12px 30px #143a5229}.focus-hero:after{position:absolute;right:39%;bottom:-85px;width:170px;height:170px;border:1px solid rgb(255 255 255 / .07);border-radius:50%;content:""}.hero-copy{position:relative;z-index:1;align-self:center}.hero-kicker{display:inline-block;margin-bottom:10px;color:#a7cbbb;font-size:11px;font-weight:700;letter-spacing:.15em}.hero-copy h2{margin-bottom:11px;font-size:clamp(25px,3vw,35px);line-height:1.2}.hero-copy p{margin-bottom:23px;color:#c5d6de;font-size:14px}.hero-copy .button{color:var(--navy-950);background:#e7f1e9;box-shadow:none}.hero-copy .button:hover{background:#f0f6f1}.relation-board{position:relative;z-index:1;display:grid;align-content:center;gap:9px}.relation-board>div{display:flex;min-height:47px;align-items:center;justify-content:space-between;padding:0 15px;border:1px solid rgb(255 255 255 / .1);border-radius:8px;background:#ffffff0e}.relation-board span{color:#fff;font-size:17px;font-weight:700;letter-spacing:.04em}.relation-board p{margin:0;color:#a9bec8;font-size:12px}.relation-board small{padding-top:3px;color:#86a4b2;font-size:10px;text-align:center}.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.metric-card{display:flex;min-height:112px;align-items:center;gap:14px;padding:19px;border:1px solid #e0e7ea;border-radius:12px;background:#fff;box-shadow:var(--shadow)}.metric-card.clickable{cursor:pointer}.metric-card.clickable:hover{border-color:#b8cbd4}.metric-icon{display:grid;width:41px;height:41px;place-items:center;flex:0 0 auto;border-radius:10px}.metric-icon.navy{color:var(--navy-700);background:var(--navy-100)}.metric-icon.amber{color:var(--amber-700);background:var(--amber-100)}.metric-icon.red{color:var(--red-700);background:var(--red-100)}.metric-icon.green{color:var(--green-700);background:var(--green-100)}.metric-card p,.metric-card strong,.metric-card small{display:block}.metric-card p{margin:0 0 3px;color:var(--muted);font-size:11px}.metric-card strong{color:var(--navy-950);font-size:25px;line-height:1.1}.metric-card small{margin-top:4px;color:#81909a;font-size:10px}.history-callout,.backup-reminder,.data-note{display:flex;align-items:center;gap:14px;padding:17px 20px;border:1px solid #ecd6b6;border-radius:11px;background:#fffaf1}.callout-icon{display:grid;width:38px;height:38px;place-items:center;flex:0 0 auto;border-radius:9px;color:var(--amber-700);background:var(--amber-100)}.history-callout div:nth-child(2),.backup-reminder div,.data-note div{flex:1}.history-callout strong,.backup-reminder strong,.data-note strong{color:var(--navy-950);font-size:13px}.history-callout p,.backup-reminder p,.data-note p{margin:3px 0 0;color:var(--muted);font-size:11px;line-height:1.6}.dashboard-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr;gap:16px}.trend-panel,.ranking-panel{min-height:277px;padding:21px}.panel-total,.available-count,.success-count{padding:4px 9px;border-radius:20px;color:var(--navy-700);background:var(--navy-100);font-size:11px;font-weight:600}.weekly-chart{display:grid;height:169px;grid-template-columns:repeat(7,1fr);gap:12px;margin-top:18px}.day-column{display:grid;min-width:0;grid-template-rows:17px 1fr 17px;gap:5px;color:#7a8a95;font-size:10px;text-align:center}.bar-track{position:relative;overflow:hidden;border-radius:5px 5px 2px 2px;background:#f1f4f5}.bar-fill{position:absolute;right:0;bottom:0;left:0;min-height:0;border-radius:5px 5px 2px 2px;background:#4f849a;transition:height .25s ease}.chart-empty{margin:-91px 0 0;color:#93a0a8;font-size:11px;text-align:center}.ranking-list{display:grid;gap:16px;margin:24px 0 0;padding:0;list-style:none}.ranking-list li{display:flex;align-items:center;gap:11px}.rank-number{display:grid;width:28px;height:28px;place-items:center;flex:0 0 auto;border-radius:7px;color:var(--navy-700);background:var(--navy-100);font-size:11px;font-weight:700}.rank-number.cause{color:var(--amber-700);background:var(--amber-100)}.ranking-list strong,.ranking-list small{display:block}.ranking-list strong{color:var(--ink);font-size:12px}.ranking-list small{margin-top:2px;color:#8b98a1;font-size:10px}.empty-state{display:flex;min-height:190px;flex-direction:column;align-items:center;justify-content:center;padding:22px;color:var(--muted);text-align:center}.empty-icon{display:grid;width:46px;height:46px;place-items:center;margin-bottom:12px;border-radius:50%;color:#78909d;background:#eff4f5}.empty-state h3{margin-bottom:5px;color:var(--navy-950);font-size:14px}.empty-state p{max-width:330px;margin:0 0 14px;font-size:11px;line-height:1.6}.segmented-tabs{display:inline-flex;width:fit-content;padding:4px;border:1px solid var(--line);border-radius:9px;background:#edf1f3}.segmented-tabs button{display:flex;min-height:37px;align-items:center;gap:7px;padding:0 16px;border:0;border-radius:6px;color:var(--muted);background:transparent;cursor:pointer;font-size:12px;font-weight:600}.segmented-tabs button.active{color:var(--navy-900);background:#fff;box-shadow:0 2px 7px #102f4314}.form-panel{overflow:hidden}.question-form{display:grid}.form-section{display:grid;gap:17px;padding:26px 30px;border-bottom:1px solid #e8edef}.form-section:last-of-type{border-bottom:0}.relation-section{border-top:3px solid var(--teal-700);background:#f7fbfa}.pending-badge{display:flex;align-items:center;gap:5px;padding:5px 9px;border-radius:20px;color:var(--amber-700);background:var(--amber-100);font-size:10px;font-weight:600}.form-grid{display:grid;gap:15px}.form-grid.three{grid-template-columns:repeat(3,1fr)}.form-grid.two{grid-template-columns:repeat(2,1fr)}label{display:grid;gap:7px;color:#415361;font-size:12px;font-weight:600}label>span small{color:#97a2a9;font-size:10px;font-weight:400}input,select,textarea{width:100%;border:1px solid #ccd7dc;border-radius:8px;color:var(--ink);background:#fff;transition:border-color .15s ease,box-shadow .15s ease}input,select{min-height:41px;padding:0 11px}textarea{padding:11px 12px;line-height:1.7;resize:vertical}input::placeholder,textarea::placeholder{color:#9da8ae}input:focus,select:focus,textarea:focus{border-color:#6f98aa;outline:none;box-shadow:0 0 0 3px #28627f17}.options-edit-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.option-input{position:relative;display:block}.option-input input{padding-left:44px}.option-letter{position:absolute;z-index:1;top:8px;left:8px;display:grid;width:25px;height:25px;place-items:center;border-radius:6px;color:var(--navy-700);background:var(--navy-100);font-size:11px}.helper-text{margin:0;color:#778792;font-size:11px;line-height:1.6}fieldset{min-width:0;margin:0;padding:0;border:0}fieldset+fieldset{margin-top:3px}legend{margin-bottom:10px;color:#415361;font-size:12px;font-weight:600}.chip-list,.tag-row{display:flex;flex-wrap:wrap;gap:7px}.toggle-chip{display:inline-flex;min-height:31px;align-items:center;gap:4px;padding:0 10px;border:1px solid #d6e0e4;border-radius:16px;color:#586975;background:#fff;cursor:pointer;font-size:11px}.toggle-chip:hover{border-color:#9eb8c3}.toggle-chip.active{border-color:#6c998e;color:#216359;background:var(--teal-100)}.form-warning{display:flex;align-items:flex-start;gap:10px;margin:20px 30px 0;padding:13px 15px;border:1px solid #f0d7ae;border-radius:9px;color:var(--amber-700);background:#fffaf1}.form-warning svg{flex:0 0 auto;margin-top:2px}.form-warning strong{color:#815114;font-size:12px}.form-warning p{margin:3px 0 0;color:#8e6a3d;font-size:10px}.form-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px}.sticky-actions{position:sticky;z-index:5;bottom:0;padding:15px 30px;border-top:1px solid var(--line);background:#fffffff5;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.batch-panel{padding:27px 30px}.batch-heading{margin-bottom:17px}.batch-heading code{padding:1px 5px;border-radius:4px;background:#edf1f2;font-family:ui-monospace,monospace}.batch-textarea{min-height:420px;margin-bottom:15px;font-family:Microsoft YaHei,sans-serif;font-size:12px}.preview-section{margin-top:26px;padding-top:24px;border-top:1px solid var(--line)}.preview-list{display:grid;gap:8px;margin:16px 0}.preview-item{display:grid;grid-template-columns:10px 1fr auto;gap:10px;align-items:start;padding:13px 14px;border:1px solid var(--line);border-radius:8px;background:#fafcfc}.preview-item.invalid{border-color:#efc8c8;background:snow}.status-dot{width:7px;height:7px;margin-top:5px;border-radius:50%}.status-dot.success{background:var(--green-700)}.status-dot.warning{background:#d38a28}.preview-item strong{color:var(--navy-950);font-size:12px}.preview-item p{overflow:hidden;margin:3px 0;color:#53636e;font-size:11px;text-overflow:ellipsis;white-space:nowrap}.preview-item small{color:var(--amber-700);font-size:10px}.text-success{color:var(--green-700)!important}.text-danger{color:var(--red-700)!important}.page-footnote{margin:0;color:#88959d;font-size:10px;text-align:center}.practice-setup{display:grid;grid-template-columns:1.45fr .7fr;gap:17px}.practice-setup>.panel{padding:25px}.mode-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:19px}.mode-card{position:relative;display:grid;min-height:82px;grid-template-columns:16px 1fr;align-content:center;column-gap:9px;padding:13px;border:1px solid var(--line);border-radius:9px;background:#fff;cursor:pointer;text-align:left}.mode-card:hover{border-color:#abc1cb}.mode-card.active{border-color:#5f8b9e;background:#f3f8fa;box-shadow:inset 0 0 0 1px #5f8b9e}.radio-dot{grid-row:1 / span 2;width:14px;height:14px;margin-top:2px;border:1.5px solid #9eafb8;border-radius:50%}.mode-card.active .radio-dot{border:4px solid var(--navy-700)}.mode-card strong{color:var(--navy-950);font-size:12px}.mode-card small{margin-top:2px;color:#84929b;font-size:10px}.setup-options{display:flex;flex-direction:column}.setup-options h3{margin:2px 0 22px;font-size:17px}.setup-filter{margin-bottom:21px}.count-picker{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}.count-picker button{min-height:38px;border:1px solid var(--line);border-radius:7px;background:#fff;cursor:pointer;font-size:12px}.count-picker button.active{border-color:var(--navy-700);color:#fff;background:var(--navy-700)}.start-practice{width:100%;margin-top:auto}.session-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(290px,340px);gap:17px;align-items:start}.session-main{display:grid;gap:14px}.session-progress{display:flex;align-items:center;gap:12px}.session-progress>div{flex:1}.session-progress span{color:#52636e;font-size:11px;font-weight:600}.question-timer{display:inline-flex;flex:0 0 auto!important;align-items:center;gap:5px;white-space:nowrap}.question-study-grid{display:grid;gap:18px}.material-pane,.question-pane{min-width:0}.progress-track{height:5px;margin-top:6px;overflow:hidden;border-radius:5px;background:#e3e9ec}.progress-track>div{height:100%;border-radius:5px;background:var(--teal-700);transition:width .25s ease}.question-card,.recognition-card,.result-panel,.reflection-panel{padding:25px 28px}.question-meta{display:flex;align-items:center;gap:8px;color:#7e8c95;font-size:10px}.question-meta i{width:3px;height:3px;border-radius:50%;background:#a4b0b6}.material-box{margin:17px 0 0;border:1px solid #e1e8eb;border-radius:8px;background:#f8fafb}.material-box summary{display:flex;min-height:39px;align-items:center;justify-content:space-between;padding:0 13px;color:var(--navy-700);cursor:pointer;font-size:11px;font-weight:600;list-style:none}.material-box[open] summary svg{transform:rotate(180deg)}.material-content>p{padding:0 13px 13px;margin:0;color:#536570;font-size:12px;line-height:1.8;white-space:pre-wrap}.material-content{padding-bottom:13px}.material-content img{display:block;width:calc(100% - 26px);max-width:820px;max-height:900px;margin:0 auto 12px;border:1px solid #dfe7ea;border-radius:8px;object-fit:contain;background:#fff;touch-action:pan-x pan-y pinch-zoom;-webkit-user-select:none;user-select:none;-webkit-user-drag:none}.material-content img:last-child{margin-bottom:0}.library-material{margin:10px 0 14px}.question-stem{margin:19px 0 0;color:var(--navy-950);font-size:18px;line-height:1.75;white-space:pre-wrap}.question-illustration{display:block;width:min(100%,760px);max-height:760px;margin:18px auto 0;border:1px solid #dfe7ea;border-radius:10px;object-fit:contain;background:#fff}.question-illustration.compact{width:min(100%,560px);max-height:520px;margin:12px 0 16px}.recognition-card{animation:reveal .18s ease both}@keyframes reveal{0%{transform:translateY(4px);opacity:0}}.recognition-step{display:flex;align-items:flex-start;gap:11px;margin-bottom:17px}.step-number{display:grid;width:27px;height:27px;place-items:center;flex:0 0 auto;border-radius:7px;color:#fff;background:var(--navy-900);font-size:11px;font-weight:700}.recognition-step strong{color:var(--navy-950);font-size:13px}.recognition-step p{margin:2px 0 0;color:#84919a;font-size:10px}.answer-button-grid{display:grid;gap:8px}.answer-button-grid.relations{grid-template-columns:repeat(4,1fr)}.answer-button-grid.times{grid-template-columns:repeat(5,1fr)}.answer-button-grid button,.choice-list button{border:1px solid #d7e0e4;border-radius:8px;color:#52636e;background:#fff;cursor:pointer}.answer-button-grid button{display:grid;min-height:63px;place-content:center;padding:8px;text-align:center}.answer-button-grid.times button{min-height:43px;font-size:11px}.answer-button-grid button:hover:not(:disabled),.choice-list button:hover:not(:disabled){border-color:#8eabb8;background:#f8fbfc}.answer-button-grid button.selected,.choice-list button.selected{border-color:var(--navy-700);color:var(--navy-900);background:#edf5f7;box-shadow:inset 0 0 0 1px var(--navy-700)}.answer-button-grid button.correct,.choice-list button.correct{border-color:#6da68e!important;color:var(--green-700)!important;background:var(--green-100)!important;box-shadow:inset 0 0 0 1px #6da68e!important}.answer-button-grid button.wrong,.choice-list button.wrong{border-color:#d78787!important;color:var(--red-700)!important;background:var(--red-100)!important;box-shadow:inset 0 0 0 1px #d78787!important}.answer-button-grid span,.answer-button-grid small{display:block}.answer-button-grid span{font-size:14px;font-weight:700}.answer-button-grid small{margin-top:2px;color:#7d8d96;font-size:9px}.choice-list{display:grid;gap:9px}.choice-list button{display:grid;min-height:54px;grid-template-columns:31px 1fr 20px;align-items:center;gap:10px;padding:10px 13px;text-align:left}.choice-list button>span{display:grid;width:28px;height:28px;place-items:center;border-radius:7px;color:var(--navy-700);background:var(--navy-100);font-size:11px;font-weight:700}.choice-list button p{margin:0;font-size:12px;line-height:1.55}.submit-answer{width:100%;margin-top:17px}.result-banner{display:flex;align-items:flex-start;gap:11px;padding:15px;border-radius:9px}.result-banner.success{color:var(--green-700);background:var(--green-100)}.result-banner.danger{color:var(--red-700);background:var(--red-100)}.result-banner.warning{color:#995d13;background:var(--amber-100)}.result-banner svg{flex:0 0 auto}.result-banner strong{font-size:13px}.result-banner p{margin:3px 0 0;color:currentColor;font-size:10px}.recognition-feedback{display:flex;flex-wrap:wrap;gap:9px;margin-top:13px}.recognition-feedback span{display:inline-flex;min-height:30px;align-items:center;gap:5px;padding:0 9px;border-radius:15px;font-size:10px}.recognition-feedback span.correct{color:var(--green-700);background:var(--green-100)}.recognition-feedback span.wrong{color:var(--red-700);background:var(--red-100)}.explanation-box{margin-top:18px;padding:17px;border-left:3px solid var(--teal-700);background:#f7f9fa}.explanation-box p,.notes-box p{margin:8px 0 0;color:#415563;font-size:12px;line-height:1.8;white-space:pre-wrap}.original-explanation{overflow:hidden;margin-top:18px;border:1px solid #d5e2e5;border-radius:10px;background:#fff}.original-explanation-heading{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 16px;border-bottom:1px solid #dfe7ea;background:#f4f8f8}.original-explanation-heading small{color:#71818a;font-size:10px}.original-explanation img{display:block;width:100%;height:auto;background:#fff;touch-action:pan-x pan-y pinch-zoom;-webkit-user-select:none;user-select:none;-webkit-user-drag:none}.original-question-images{overflow:hidden;margin-top:15px;border:1px solid #d8e2e6;border-radius:10px;background:#fff}.original-question-images img{display:block;width:100%;max-height:560px;border-bottom:1px solid #e4eaed;object-fit:contain;background:#fff;touch-action:pan-x pan-y pinch-zoom;-webkit-user-select:none;user-select:none;-webkit-user-drag:none}.original-question-images img:last-child{border-bottom:0}.recognition-intro{display:grid;grid-template-columns:1fr auto;gap:25px;align-items:center;padding:29px 32px;border:1px solid #b9d5d1;border-radius:14px;background:linear-gradient(135deg,#f2f8f6,#f7fafb)}.recognition-intro h2{margin:5px 0 7px;color:var(--navy-950);font-size:20px}.recognition-intro p{margin:0;color:#61747d;font-size:11px;line-height:1.7}.recognition-intro-stats{display:grid;min-width:145px;justify-items:end}.recognition-intro-stats strong{color:var(--teal-700);font-size:34px}.recognition-intro-stats span,.recognition-intro-stats small{color:#6e8188;font-size:10px}.recognition-setup-grid{display:grid;grid-template-columns:1.4fr .7fr;gap:17px}.recognition-setup-grid>.panel,.recognition-question-card,.recognition-answer-sheet,.recognition-standard-answer{padding:25px 28px}.recognition-mode-grid{grid-template-columns:repeat(2,1fr)}.recognition-setup-options{display:flex;flex-direction:column;gap:18px}.recognition-setup-options h3{margin:-14px 0 0;color:var(--navy-950);font-size:17px}.recognition-setup-note{margin:0;color:#7d8d95;font-size:9px;line-height:1.65}.recognition-session{display:grid;width:min(1040px,100%);gap:14px;margin:0 auto}.recognition-source-meta{flex-wrap:wrap}.recognition-source-meta b{margin-left:auto;padding:4px 8px;border-radius:10px;color:#a15f0b;background:var(--amber-100);font-size:9px}.ten-second-rule{display:flex;align-items:center;gap:8px;margin-top:17px;padding:12px 14px;border-radius:8px;color:#86520d;background:var(--amber-100);font-size:10px}.recognition-answer-sheet{display:grid;gap:19px}.recognition-answer-sheet label>span{display:block;margin-bottom:8px;color:var(--navy-900);font-size:11px;font-weight:700}.recognition-relation-picker,.recognition-time-picker,.recognition-rating>div{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.recognition-relation-picker button,.recognition-time-picker button,.recognition-rating button{min-height:39px;border:1px solid #d6e0e4;border-radius:7px;color:#5d6f79;background:#fff;cursor:pointer;font-size:10px}.recognition-relation-picker button.active,.recognition-time-picker button.active,.recognition-rating button.active{border-color:var(--navy-700);color:#fff;background:var(--navy-700)}.recognition-answer-sheet textarea{width:100%;min-height:88px;resize:vertical;padding:12px 13px;border:1px solid #d6e0e4;border-radius:8px;color:var(--ink);background:#fff;font:inherit;font-size:12px;line-height:1.7}.recognition-result-flags{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 15px}.recognition-result-flags span{display:inline-flex;min-height:30px;align-items:center;gap:5px;padding:0 10px;border-radius:15px;font-size:10px}.recognition-result-flags .correct{color:var(--green-700);background:var(--green-100)}.recognition-result-flags .wrong{color:var(--red-700);background:var(--red-100)}.standard-first-action,.standard-trap,.product-rule{margin-top:13px;padding:15px 17px;border-radius:8px}.standard-first-action{border-left:3px solid var(--teal-700);background:#f1f7f6}.standard-trap{border-left:3px solid #c9893e;background:#fdf8f0}.standard-first-action strong,.standard-trap strong{color:var(--navy-900);font-size:10px}.standard-first-action p,.standard-trap p{margin:5px 0 0;color:#465a65;font-size:12px;line-height:1.75}.product-rule{color:#184f48;background:#e9f4f1;font-size:11px;font-weight:650;line-height:1.75}.recognition-full-review{margin-top:17px;border:1px solid #dbe4e7;border-radius:8px;background:#fafcfc}.recognition-full-review summary{padding:13px 15px;color:var(--navy-700);cursor:pointer;font-size:10px;font-weight:700}.recognition-full-review p{padding:0 15px;color:#526570;font-size:11px;line-height:1.75}.recognition-full-review img{display:block;width:100%;margin-top:10px;background:#fff}.recognition-rating{margin:18px 0}.recognition-rating>div{grid-template-columns:repeat(3,1fr)}.library-original{margin-top:13px}.library-original summary{padding:10px 12px;color:var(--teal-700);cursor:pointer;font-size:10px;font-weight:700}.library-original img{border-top:1px solid #dfe7ea}.result-tags,.notes-box{margin-top:18px}.result-tags>strong,.notes-box>strong{display:block;margin-bottom:8px;color:var(--navy-950);font-size:11px}.tag{display:inline-flex;min-height:23px;align-items:center;padding:0 8px;border-radius:12px;color:#45606e;background:#edf2f4;font-size:9px}.tag.cause{color:#8a5c20;background:var(--amber-100)}.muted{color:#93a0a7;font-size:10px}.state-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin-bottom:20px}.state-picker button{min-height:44px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer;font-size:12px;font-weight:600}.state-picker button.active{border-color:var(--teal-700);color:var(--teal-700);background:var(--teal-100);box-shadow:inset 0 0 0 1px var(--teal-700)}.mastery-rule{margin:16px 0 0;color:#829099;font-size:10px}.next-button{width:100%;margin-top:18px}.session-aside{position:sticky;top:98px;display:grid;gap:13px}.session-aside .panel{padding:17px}.aside-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:11px}.aside-heading>span:last-child{color:#8a98a0;font-size:10px}.mini-history{display:grid}.mini-history>div{display:grid;grid-template-columns:17px 1fr;gap:2px 7px;align-items:center;padding:9px 0;border-bottom:1px solid #edf1f2}.mini-history>div:last-child{border-bottom:0}.mini-history span{font-size:10px}.mini-history small{grid-column:2;color:#98a3a9;font-size:9px}.session-complete{display:flex;min-height:500px;flex-direction:column;align-items:center;justify-content:center;padding:40px;text-align:center}.complete-icon{display:grid;width:65px;height:65px;place-items:center;margin-bottom:17px;border-radius:50%;color:var(--green-700);background:var(--green-100)}.session-complete h2{margin:6px 0 8px;color:var(--navy-950);font-size:24px}.session-complete>p{color:var(--muted);font-size:12px}.completion-metrics{display:grid;width:min(500px,100%);grid-template-columns:repeat(3,1fr);gap:10px;margin:22px 0}.completion-metrics>div{padding:17px 10px;border:1px solid var(--line);border-radius:9px}.completion-metrics strong,.completion-metrics span{display:block}.completion-metrics strong{color:var(--navy-900);font-size:21px}.completion-metrics span{margin-top:3px;color:#84919a;font-size:10px}.filters-panel{padding:18px}.search-sort-row{display:grid;grid-template-columns:1fr auto;gap:12px}.search-box{position:relative;display:flex;align-items:center}.search-box>svg{position:absolute;left:12px;color:#8c9aa2}.search-box input{padding:0 40px}.search-box button{position:absolute;right:9px;display:grid;width:27px;height:27px;place-items:center;border:0;color:#84929a;background:transparent;cursor:pointer}.sort-box{display:flex;align-items:center;gap:8px}.sort-box select{width:145px}.filter-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:12px;padding-top:12px;border-top:1px solid #e9edef}.filter-label{display:inline-flex;align-items:center;gap:5px;color:#60717c;font-size:11px;font-weight:600}.filter-row select{width:auto;min-height:34px;padding-right:31px;font-size:10px}.library-summary{display:flex;justify-content:space-between;color:#77868f;font-size:11px}.library-summary strong{color:var(--navy-900)}.table-panel{overflow:hidden}.question-table{min-width:900px}.table-head,.table-row{display:grid;grid-template-columns:minmax(330px,2.1fr) minmax(160px,1fr) 90px 95px 80px;gap:15px;align-items:center}.table-head{min-height:43px;padding:0 20px;border-bottom:1px solid var(--line);color:#819099;background:#f7f9fa;font-size:10px;font-weight:600}.table-record{border-bottom:1px solid #e8edef}.table-record:last-child{border-bottom:0}.table-row{min-height:88px;padding:13px 20px}.question-cell{display:flex;min-width:0;align-items:flex-start;gap:9px}.expand-button{display:grid;width:25px;height:25px;place-items:center;flex:0 0 auto;margin-top:1px;padding:0;border:0;color:#8b99a1;background:transparent;cursor:pointer}.question-cell>div{min-width:0}.source-line,.question-cell strong{display:block}.source-line{margin-bottom:4px;color:#87949c;font-size:9px}.question-cell strong{overflow:hidden;margin-bottom:6px;color:var(--ink);font-size:11px;line-height:1.55;text-overflow:ellipsis;white-space:nowrap}.relation-cell strong,.relation-cell small,.attempt-cell strong,.attempt-cell small{display:block}.relation-cell strong,.attempt-cell strong{color:var(--ink);font-size:10px}.relation-cell small,.attempt-cell small{margin-top:3px;color:#8c98a0;font-size:9px}.status-badge{display:inline-flex;min-height:24px;align-items:center;padding:0 8px;border-radius:12px;font-size:9px;font-weight:600}.status-badge.pending{color:var(--amber-700);background:var(--amber-100)}.status-badge.unlearned{color:var(--red-700);background:var(--red-100)}.status-badge.reviewing{color:var(--navy-700);background:var(--navy-100)}.status-badge.mastered{color:var(--green-700);background:var(--green-100)}.row-actions{display:flex;gap:5px}.expanded-row{display:grid;grid-template-columns:1fr 1.3fr;gap:25px;padding:20px 53px;border-top:1px dashed #dce4e8;background:#fafcfc}.expanded-section>p{margin:7px 0;color:#52636e;font-size:10px;line-height:1.7}.expanded-section>strong{color:var(--navy-900);font-size:10px}.explanation-preview{white-space:pre-wrap}.history-table{display:grid;margin-top:7px}.history-table>div{display:grid;grid-template-columns:70px 65px 42px 95px 1fr;gap:7px;padding:7px 0;border-bottom:1px solid #e7ecee;color:#586974;font-size:9px}.history-table>div>span:first-child{display:flex;align-items:center;gap:4px}.modal-backdrop{position:fixed;z-index:100;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:20px;background:#0a1e2a85;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.confirm-dialog{width:min(430px,100%);padding:27px;border-radius:13px;background:#fff;box-shadow:0 20px 60px #0003}.danger-dialog-icon{display:grid;width:42px;height:42px;place-items:center;margin-bottom:14px;border-radius:10px;color:var(--red-700);background:var(--red-100)}.confirm-dialog h3{margin-bottom:7px;color:var(--navy-950);font-size:18px}.confirm-dialog p{margin-bottom:21px;color:var(--muted);font-size:11px;line-height:1.7}.diagnosis-panel{display:flex;align-items:flex-start;gap:16px;padding:25px 28px;border:1px solid #b8d7ce;border-radius:13px;background:#f2f8f6}.diagnosis-icon{display:grid;width:45px;height:45px;place-items:center;flex:0 0 auto;border-radius:11px;color:var(--teal-700);background:#dfeeea}.diagnosis-panel h2{margin:5px 0 6px;color:#174c45;font-size:17px;line-height:1.6}.diagnosis-panel p{margin:0;color:#688078;font-size:10px}.statistics-metrics{grid-template-columns:repeat(3,1fr)}.relation-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:0 23px 23px}.relation-stats-grid+*{margin-top:0}.relation-stats-grid article{padding:15px;border:1px solid var(--line);border-radius:9px;background:#fafcfc}.relation-stats-grid>article>strong,.relation-stats-grid>article>small{display:block}.relation-stats-grid>article>strong{color:var(--navy-950);font-size:11px}.relation-stats-grid>article>small{margin-top:3px;color:#8a979f;font-size:9px}.relation-stats-grid{margin-top:18px}.dual-stat{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:13px}.dual-stat>div{padding:9px;border-radius:7px;background:#edf3f5}.dual-stat span,.dual-stat small{display:block}.dual-stat span{color:var(--navy-700);font-size:15px;font-weight:700}.dual-stat small{margin-top:2px;color:#819099;font-size:8px}.statistics-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:16px}.statistics-grid .panel,.relation-stats-grid+.panel,.statistics-metrics+.panel{padding:23px}.line-bars{display:grid;height:190px;grid-template-columns:repeat(7,1fr);gap:8px;margin-top:16px}.line-bars>div{display:grid;grid-template-rows:17px 1fr 17px;color:#829099;font-size:9px;text-align:center}.line-bars>div>div{position:relative;overflow:hidden;margin:0 3px;border-radius:4px 4px 1px 1px;background:#eff3f4}.line-bars i{position:absolute;right:0;bottom:0;left:0;min-height:0;background:#668ea1}.cause-bars{display:grid;gap:10px;margin-top:19px}.cause-bars>div{display:grid;grid-template-columns:minmax(125px,.8fr) 1.3fr 24px;align-items:center;gap:10px;font-size:10px}.cause-bars>div>span{overflow:hidden;color:#52636e;text-overflow:ellipsis;white-space:nowrap}.cause-bars>div>div{height:7px;overflow:hidden;border-radius:5px;background:#f0f2f3}.cause-bars i{display:block;height:100%;border-radius:5px;background:#c7893c}.cause-bars strong{color:#6f7e87;font-size:10px}.stats-table-panel{padding:0!important}.table-title{padding:20px 23px;border-bottom:1px solid var(--line)}.stats-table{min-width:650px}.stats-table-head,.stats-table>div:not(.stats-table-head){display:grid;grid-template-columns:2fr repeat(4,1fr);gap:10px;align-items:center;min-height:43px;padding:0 23px;border-bottom:1px solid #ebeff1;font-size:10px}.stats-table-head{color:#7f8d96;background:#f8fafb;font-weight:600}.stats-table>div:last-child{border-bottom:0}.stats-table strong{color:var(--ink);font-size:10px}.stats-table span{color:#657680}.backup-reminder{border-color:#ecd6b6}.backup-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.backup-card{display:flex;min-height:330px;flex-direction:column;align-items:flex-start;padding:28px}.backup-card-icon{display:grid;width:50px;height:50px;place-items:center;margin-bottom:20px;border-radius:12px;color:var(--navy-700);background:var(--navy-100)}.backup-card-icon.upload{color:var(--teal-700);background:var(--teal-100)}.backup-card h2{margin:5px 0 8px;color:var(--navy-950);font-size:18px}.backup-card>p{max-width:460px;color:var(--muted);font-size:11px;line-height:1.7}.backup-summary{display:flex;gap:8px;margin:8px 0 21px}.backup-summary span{padding:5px 9px;border-radius:5px;color:#667984;background:#f0f3f4;font-size:10px}.backup-card .button{margin-top:auto}.file-input{display:none}.file-error{margin:10px 0 0!important;color:var(--red-700)!important}.import-preview{padding:25px}.import-counts{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin:18px 0}.import-counts>div{padding:13px;border:1px solid var(--line);border-radius:8px;background:#fafcfc}.import-counts strong,.import-counts span{display:block}.import-counts strong{color:var(--navy-900);font-size:16px}.import-counts span{margin-top:3px;color:#829099;font-size:9px}.import-options{display:grid;grid-template-columns:1fr 1fr;gap:10px}.import-option{display:grid;min-height:90px;grid-template-columns:25px 1fr 18px;gap:10px;align-items:center;padding:15px;border:1px solid #b8d1d9;border-radius:9px;color:var(--navy-700);background:#f7fbfc;cursor:pointer;text-align:left}.import-option.overwrite{border-color:#e6c5c5;color:var(--red-700);background:snow}.import-option strong{display:block;color:var(--ink);font-size:12px}.import-option p{margin:3px 0 0;color:#7d8c94;font-size:9px}.data-note{border-color:#c9ddd7;color:var(--teal-700);background:#f5faf8}.toast{position:fixed;z-index:200;right:24px;bottom:24px;display:flex;min-height:46px;align-items:center;gap:8px;padding:0 16px;border-radius:9px;color:#fff;background:#173f55;box-shadow:0 12px 35px #0003;font-size:12px;animation:toast-in .2s ease both}@keyframes toast-in{0%{transform:translateY(8px);opacity:0}}.mobile-nav,.sidebar-overlay{display:none}@media(max-width:1100px){:root{--sidebar: 88px}.sidebar{width:var(--sidebar);align-items:center;padding:18px 10px;overflow-y:auto;overscroll-behavior:contain}.brand{justify-content:center;padding:0 0 22px}.brand-mark{width:43px;height:43px;border-radius:13px}.brand>div,.sidebar-tip{display:none}.sidebar nav{width:100%;gap:6px}.sidebar nav button{position:relative;min-height:62px;flex-direction:column;justify-content:center;gap:4px;padding:6px 2px;border-radius:13px;font-size:10px;text-align:center}.sidebar nav button.active{box-shadow:inset 0 3px #9ec8ba}.sidebar nav button i{position:absolute;top:5px;right:5px;min-width:17px;padding:1px 4px;font-size:8px}.topbar,.page-container{padding-inline:24px}.metric-grid{grid-template-columns:repeat(2,1fr)}.dashboard-grid{grid-template-columns:1fr 1fr}.trend-panel{grid-column:1 / -1}.relation-stats-grid{grid-template-columns:repeat(2,1fr)}.practice-setup{grid-template-columns:1.25fr .75fr}.answer-button-grid.relations{grid-template-columns:repeat(2,1fr)}}@media(min-width:721px)and (max-width:900px){.dashboard-grid,.practice-setup,.recognition-setup-grid,.statistics-grid,.backup-grid,.session-layout,.recognition-intro{grid-template-columns:1fr}.recognition-intro-stats{justify-items:start}.session-aside{position:static;grid-template-columns:1fr 1fr}.trend-panel{grid-column:auto}}@media(min-width:721px)and (max-width:900px)and (max-height:520px){.sidebar{padding-block:8px}.brand{display:none}.sidebar nav{gap:3px}.sidebar nav button{min-height:47px}.sidebar nav button span{display:none}}@media(max-width:720px){:root{--sidebar: 0px}.sidebar{width:min(82vw,300px);align-items:stretch;padding:max(18px,env(safe-area-inset-top)) 15px 20px;transform:translate(-105%);transition:transform .2s ease}.brand{justify-content:flex-start;padding:0 7px 24px}.brand>div,.sidebar-tip{display:block}.sidebar nav{gap:5px}.sidebar nav button{min-height:50px;flex-direction:row;justify-content:flex-start;gap:12px;padding:0 13px;border-radius:11px;font-size:13px;text-align:left}.sidebar nav button.active{box-shadow:inset 3px 0 #9ec8ba}.sidebar nav button i{position:static;min-width:25px;margin-left:auto;padding:2px 6px;font-size:11px}.sidebar.open{transform:translate(0)}.mobile-close,.menu-button,.sidebar-overlay{display:grid}.sidebar-overlay{position:fixed;z-index:35;top:0;right:0;bottom:0;left:0;border:0;background:#07172175}.topbar{min-height:calc(66px + env(safe-area-inset-top));padding:max(10px,env(safe-area-inset-top)) 14px 10px}.page-container{padding:18px 16px calc(96px + env(safe-area-inset-bottom))}.focus-hero{grid-template-columns:1fr;padding:29px}.relation-board{grid-template-columns:repeat(3,1fr)}.relation-board>div{display:grid;justify-content:center;min-height:65px;text-align:center}.relation-board small{grid-column:1 / -1}.dashboard-grid,.practice-setup,.recognition-setup-grid,.statistics-grid,.backup-grid,.recognition-intro{grid-template-columns:1fr}.recognition-intro-stats{justify-items:start}.trend-panel{grid-column:auto}.form-grid.three{grid-template-columns:1fr 1fr}.session-layout{grid-template-columns:1fr}.session-aside{position:static;grid-template-columns:1fr 1fr}.table-panel,.stats-table-panel{overflow-x:auto}.mobile-nav{position:fixed;z-index:30;right:0;bottom:0;left:0;display:grid;grid-template-columns:repeat(5,1fr);min-height:calc(66px + env(safe-area-inset-bottom));padding:5px 7px max(6px,env(safe-area-inset-bottom));border-top:1px solid #dfe6e9;background:#fffffff5;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.mobile-nav button{display:grid;min-height:54px;place-items:center;align-content:center;gap:2px;border:0;color:#7b8a93;background:transparent;font-size:10px;font-weight:600}.mobile-nav button.active{color:var(--navy-700)}.mobile-nav button.mobile-primary svg{width:42px;height:42px;margin-top:-13px;padding:10px;border-radius:15px;color:#fff;background:var(--navy-900);box-shadow:0 7px 18px #143a523d}.mobile-nav button.mobile-primary span{margin-top:-9px}.button,.quick-add,.install-app{min-height:44px}.icon-button,.menu-button{width:44px;height:44px}input,select,textarea{font-size:16px}.session-progress{position:sticky;z-index:18;top:calc(66px + env(safe-area-inset-top));margin:-6px -3px 0;padding:9px 3px;background:#f5f7f8f2;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.sticky-actions{bottom:calc(66px + env(safe-area-inset-bottom))}}@media(max-width:600px){.topbar h1{font-size:19px}.topbar p,.quick-add span{display:none}.quick-add,.install-app{width:44px;justify-content:center;padding:0}.install-app span{display:none}.page-container{padding-inline:13px}.page-stack{gap:14px}.focus-hero{padding:24px 20px}.hero-copy p{font-size:12px;line-height:1.7}.relation-board{grid-template-columns:1fr}.relation-board small{grid-column:auto}.metric-grid,.statistics-metrics{grid-template-columns:1fr 1fr;gap:8px}.metric-card{min-height:100px;gap:10px;padding:13px}.metric-icon{width:34px;height:34px}.metric-card strong{font-size:20px}.history-callout,.backup-reminder,.data-note{align-items:flex-start}.history-callout .button{display:none}.form-section,.batch-panel,.question-card,.recognition-card,.recognition-question-card,.recognition-answer-sheet,.recognition-standard-answer,.result-panel,.reflection-panel{padding:20px 16px}.question-stem{margin-top:16px;font-size:17px;line-height:1.68}.question-illustration{max-height:none;margin-top:14px;border-radius:8px}.sticky-actions{padding:12px 16px}.form-grid.three,.form-grid.two,.options-edit-grid{grid-template-columns:1fr}.section-heading{gap:8px}.segmented-tabs{width:100%}.segmented-tabs button{flex:1;justify-content:center}.batch-heading{display:grid}.batch-heading .button{width:100%}.preview-item{grid-template-columns:10px 1fr}.preview-item .status-badge{display:none}.practice-setup>.panel{padding:19px 15px}.mode-grid{grid-template-columns:1fr}.recognition-relation-picker,.recognition-time-picker,.answer-button-grid.relations,.answer-button-grid.times{grid-template-columns:repeat(2,1fr)}.answer-button-grid button,.choice-list button{min-height:58px}.answer-button-grid.times button:last-child{grid-column:1 / -1}.session-aside{grid-template-columns:1fr}.submit-answer,.recognition-answer-sheet>.button.primary{position:sticky;z-index:12;bottom:calc(72px + env(safe-area-inset-bottom));min-height:50px;box-shadow:0 8px 24px #102f432e}.state-picker{gap:6px}.search-sort-row{grid-template-columns:1fr}.sort-box{justify-content:space-between}.sort-box select{flex:1}.filter-row select{width:calc(50% - 4px)}.filter-label{width:100%}.relation-stats-grid{grid-template-columns:1fr;padding:0 15px 15px}.import-counts,.import-options{grid-template-columns:1fr}.completion-metrics{gap:5px}.completion-metrics strong{font-size:16px}.toast{right:13px;bottom:72px;left:13px;justify-content:center}}.app-loading{display:grid;min-height:100dvh;place-content:center;justify-items:center;gap:14px;color:var(--navy-800);background:var(--soft)}.backup-actions-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:auto}.offline-card{display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center;padding:24px 28px}.offline-card .backup-card-icon{margin:0}.backup-card-icon.offline{color:var(--teal-700);background:var(--teal-100)}.offline-card h2{margin:4px 0 5px;color:var(--navy-950);font-size:17px}.offline-card p{margin:0;color:var(--muted);font-size:11px;line-height:1.65}.offline-progress{display:block;margin-top:8px;color:var(--teal-700);font-size:11px}.submit-with-confidence{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:end;margin-top:18px}.submit-with-confidence fieldset{min-width:0;margin:0}.confidence-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:7px}.confidence-picker button{min-height:42px;border:1px solid var(--line);border-radius:8px;color:#556872;background:#fff;cursor:pointer}.confidence-picker button.active{border-color:var(--teal-700);color:var(--teal-700);background:var(--teal-100);box-shadow:inset 0 0 0 1px var(--teal-700)}.draft-pad{overflow:hidden}.draft-toolbar,.draft-toolbar>div,.draft-actions{display:flex;align-items:center}.draft-toolbar{justify-content:space-between;gap:10px;margin-bottom:10px}.draft-toolbar>div:first-child{display:grid;gap:3px}.draft-toolbar strong{display:inline-flex;align-items:center;gap:5px;color:var(--navy-900);font-size:11px}.draft-actions{gap:5px}.color-dot{width:24px;height:24px;padding:0;border:3px solid #fff;border-radius:50%;box-shadow:0 0 0 1px var(--line);cursor:pointer}.color-dot.active{box-shadow:0 0 0 2px var(--teal-500)}.draft-pad canvas{display:block;width:100%;height:260px;border:1px solid #d9e3e6;border-radius:9px;background-color:#fff;background-image:linear-gradient(#edf2f4 1px,transparent 1px),linear-gradient(90deg,#edf2f4 1px,transparent 1px);background-size:20px 20px;touch-action:none;cursor:crosshair}.draft-pad textarea{width:100%;margin-top:9px;resize:vertical}@media(min-width:1400px)and (orientation:landscape){.question-study-grid{grid-template-columns:minmax(300px,.9fr) minmax(340px,1.1fr);align-items:start}.material-pane{position:sticky;top:98px;max-height:calc(100dvh - 125px);overflow:auto}.question-study-grid .material-box{margin-top:14px}}@media(min-width:901px)and (max-width:1200px){.session-layout{grid-template-columns:minmax(0,1fr) 300px}.session-progress{flex-wrap:wrap}.question-timer{width:100%;margin-left:56px}}@media(max-width:720px){.offline-card,.submit-with-confidence{grid-template-columns:1fr}.offline-card{align-items:start;padding:20px 16px}.offline-card .button{width:100%}.question-timer{max-width:118px;white-space:normal;line-height:1.45}.draft-pad canvas{height:220px}}