@import "https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;500;600;700;800&family=IBM+Plex+Mono:wght@400;500&display=swap";
:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--ink:#20252c;--muted:#596675;--primary:#0078d4;--primary-ink:#005a9e;--primary-light:#eaf4fd;--line:#dce3eb;--paper:#f8fafc;--yellow:#f3cf63;--red:#b64b43;--radius:6px;--surface:#fff;--on-primary:#fff;--primary-hover:#106ebe;--selected-bg:#edf6fd;--hover-line:#6daee0;--input-border:#bccada;--placeholder:#64748b;--disabled-bg:#e6ebf1;--disabled-ink:#697786;--soft-bg:#eef2f6;--section-bg:#eaf4fd;--pattern:#dbe7f355;--track:#e0e8f1;--code-bg:#eef2f6;--code-border:#d7e0e8;--code-edge:#8da9c0;--success:#1f7a49;--success-bg:#eaf4ed;--success-border:#9bbb9f;--danger-bg:#fcf0ed;--danger-border:#d1a19a;--warning-bg:#fbf2d5;--warning-ink:#80682d;--warning-border:#c7972d;--partial-bg:#fff0c8;--partial-ink:#876322;--partial-border:#dbbf71;--stat-primary-bg:#e2effb;--stat-red-bg:#f7e9e6;--stat-yellow-bg:#fcf0c9;--stat-yellow-ink:#8b6c1a;--toast-bg:#243447;--toast-ink:#fff}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--ink:#e8edf3;--muted:#adb8c5;--primary:#68b8f8;--primary-ink:#68b8f8;--primary-light:#1d3347;--line:#39424e;--paper:#17191d;--red:#f09a90;--surface:#21252b;--on-primary:#0b2034;--primary-hover:#8acbff;--selected-bg:#20384e;--hover-line:#4d9cd4;--input-border:#58697c;--placeholder:#9ba9ba;--disabled-bg:#303841;--disabled-ink:#a1aebd;--soft-bg:#292f38;--section-bg:#20384e;--pattern:#adb8c50c;--track:#354353;--code-bg:#1b2026;--code-border:#39424e;--code-edge:#6387a5;--success:#91d6b2;--success-bg:#243b2c;--success-border:#60876a;--danger-bg:#412b2a;--danger-border:#aa7770;--warning-bg:#383223;--warning-ink:#edd28e;--warning-border:#ba984e;--partial-bg:#413923;--partial-ink:#edd28e;--partial-border:#ac9153;--stat-primary-bg:#20384e;--stat-red-bg:#442e2c;--stat-yellow-bg:#403823;--stat-yellow-ink:#edd28e;--toast-bg:#dce8f5;--toast-ink:#162434}*{box-sizing:border-box}body{color:var(--ink);background:var(--paper);letter-spacing:0;margin:0;font-family:Be 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span{background:var(--yellow);width:7px;height:7px;position:absolute;top:-3px;right:-3px}.brand-separator{background:var(--line);width:1px;height:20px;margin:0 5px}.brand-subtitle{color:var(--muted);font-size:10px;font-weight:500}nav{align-self:stretch;gap:24px;display:flex}.nav-tab{color:var(--muted);background:0 0;border:0;border-bottom:3px solid #0000;justify-content:center;align-items:center;gap:8px;padding:0 2px;font-size:13px;display:flex}.nav-tab.active{color:var(--primary-ink);border-bottom-color:var(--primary);font-weight:600}.theme-toggle{border:1px solid var(--line);background:var(--surface);width:40px;height:40px;color:var(--primary-ink);border-radius:4px;flex-shrink:0;align-self:center;place-items:center;padding:0;display:grid}.theme-toggle:hover{background:var(--primary-light);border-color:var(--hover-line)}.account-bar{align-items:center;gap:10px;min-width:0;display:flex}.account-bar span{text-overflow:ellipsis;white-space:nowrap;max-width:130px;font-size:12px;overflow:hidden}.auth-layout{max-width:440px;margin:36px auto}.auth-layout .segmented{margin:24px 0}.auth-layout .segmented button{flex:1;padding:10px;font-size:13px}.auth-form input{font-size:16px}.registration-code-row{align-items:center;gap:10px;margin-top:7px;display:flex}.field .registration-code{min-width:0;color:var(--primary-ink);flex:1;margin-top:0;font-family:IBM Plex Mono,monospace;font-size:18px}.registration-code-row .theme-toggle{margin-left:0}.registration-profile{border-block:1px solid var(--line);margin:24px 0;padding-block:16px}.registration-profile p{color:var(--muted);overflow-wrap:anywhere;margin:5px 0 0}.field input[readonly]{background:var(--soft-bg)}.page{max-width:1240px;min-height:calc(100vh - 155px);margin:auto;padding:42px 36px 64px}.eyebrow{color:var(--primary-ink);align-items:center;gap:8px;margin:0 0 10px;font-size:10px;font-weight:700;display:flex}.eyebrow:before{content:"";background:var(--primary);width:7px;height:7px}h1,h2,h3,p{margin-top:0}h1{margin-bottom:9px;font-size:32px;font-weight:700;line-height:1.35}h2{font-size:20px;font-weight:600;line-height:1.5}h3{font-size:15px;line-height:1.6}.muted{color:var(--muted)}.page-intro{justify-content:space-between;align-items:center;gap:24px;padding-bottom:30px;display:flex}.page-intro p{color:var(--muted);margin-bottom:0}.subject-art{border-left:1px solid var(--line);align-items:center;gap:17px;padding:18px 0 18px 36px;display:flex}.subject-art img{object-fit:contain;width:58px;height:58px}.subject-art strong{font-family:IBM Plex Mono,monospace;font-size:16px;display:block}.subject-art small{color:var(--muted);font-size:10px}.stats-band{border-block:1px solid var(--line);background:repeating-linear-gradient(135deg, transparent, transparent 7px, var(--pattern) 7px, var(--pattern) 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h2{margin:0}.section-heading>span{color:var(--muted);font-size:11px}.exam-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.exam-choice{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);cursor:pointer;align-items:center;gap:15px;min-height:108px;padding:18px 16px;transition:border-color .15s,background .15s;display:flex;position:relative}.exam-choice:hover{border-color:var(--hover-line)}.exam-choice.selected{border-color:var(--primary);background:var(--selected-bg);box-shadow:inset 0 0 0 1px var(--primary)}.exam-choice input{opacity:0;width:1px;height:1px;position:absolute}.exam-choice:focus-within{outline:3px solid var(--yellow);outline-offset:2px}.exam-number{color:#a6b2ab;flex-shrink:0;width:40px;font-family:IBM Plex Mono,monospace;font-size:25px;font-weight:500}.selected .exam-number{color:var(--primary-ink)}.exam-choice strong{margin-bottom:5px;font-size:14px;font-weight:600;display:block}.exam-meta{color:var(--muted);flex-wrap:wrap;align-items:center;gap:5px;font-size:10px;display:flex}.exam-meta svg{width:12px;height:12px}.exam-dot{border:1px solid #b7c3ba;border-radius:50%;width:16px;height:16px;position:absolute;top:13px;right:12px}.selected .exam-dot{border:5px solid var(--primary);background:var(--surface)}.entry-panel{border-top:3px solid var(--primary);padding-top:20px}.panel-kicker{color:var(--muted);margin-bottom:4px;font-size:10px;font-weight:600}.entry-panel h2{margin-bottom:18px;font-size:22px}.entry-summary{border-bottom:1px solid var(--line);gap:16px;margin-bottom:24px;padding-bottom:20px;font-size:11px;display:flex}.entry-summary span{align-items:center;gap:7px;display:flex}.entry-summary svg{width:15px;height:15px;color:var(--primary-ink)}.field{margin-bottom:17px;font-size:12px;font-weight:500;display:block}.field input{border:1px solid var(--input-border);background:var(--surface);width:100%;min-height:44px;color:var(--ink);border-radius:4px;margin-top:7px;padding:10px 12px;font-size:13px;display:block}.field input::placeholder{color:var(--placeholder);font-weight:400}.button{border:1px solid #0000;border-radius:4px;justify-content:center;align-items:center;gap:9px;min-height:44px;padding:10px 17px;font-size:12px;font-weight:600;text-decoration:none;display:inline-flex}.button.primary{background:var(--primary);color:var(--on-primary)}.button.primary:hover:not(:disabled){background:var(--primary-hover)}.button.secondary{background:var(--surface);color:var(--ink);border-color:var(--line)}.button:disabled{background:var(--disabled-bg);color:var(--disabled-ink);border-color:var(--disabled-bg)}.full-width{width:100%}.exam-composition{border-top:1px solid var(--line);margin-top:25px;padding-top:20px}.exam-composition h3{margin-bottom:13px;font-size:12px}.composition-row{color:var(--muted);justify-content:space-between;gap:16px;margin-bottom:10px;font-size:11px;display:flex}.composition-row strong{color:var(--ink);font-weight:500}.error-text{color:var(--red);margin:12px 0 0;font-size:12px}.resume-band{background:var(--warning-bg);border-left:3px solid var(--warning-border);justify-content:space-between;align-items:center;gap:14px;margin-bottom:24px;padding:14px 18px;font-size:12px;display:flex}.resume-band strong{display:block}.resume-band span{color:var(--warning-ink);font-size:11px}.library-greeting{font-size:14px}.library-greeting span{color:var(--muted)}.library-overview{border-block:1px solid var(--line);background:repeating-linear-gradient(135deg, transparent, transparent 7px, var(--pattern) 7px, var(--pattern) 8px);flex-wrap:wrap;gap:30px;margin-bottom:28px;padding:19px 0;display:flex}.library-overview>div{align-items:center;gap:9px;font-size:12px;display:flex}.library-overview strong{margin-right:4px;font-size:18px}.overview-icon{color:var(--muted);display:flex}.completed-icon{color:var(--success)}.library-resume{border-left:3px solid var(--primary);background:var(--primary-light);align-items:center;gap:17px;margin-bottom:28px;padding:20px 0 20px 18px;display:flex}.resume-symbol{width:42px;height:42px;color:var(--primary-ink);place-items:center;display:grid}.library-resume h2{margin:1px 0 4px;font-size:18px}.library-resume p{color:var(--muted);margin:0;font-size:12px}.library-resume p span{margin:0 5px}.library-resume>.button{margin:0 18px 0 auto}.library-layout{grid-template-columns:240px minmax(0,1fr);align-items:start;gap:36px;display:grid}.subject-sidebar{border-right:1px solid var(--line);padding-right:24px}.subject-sidebar>h2{color:var(--muted);margin:0 0 15px;font-size:13px}.subject-list{flex-direction:column;gap:6px;display:flex}.mobile-subject{display:none}.subject-button{text-align:left;width:100%;min-height:64px;color:var(--ink);background:0 0;border:1px solid #0000;border-radius:4px;align-items:center;gap:10px;padding:11px;display:flex}.subject-button:hover{background:var(--soft-bg)}.subject-button.selected{background:var(--primary-light);border-color:var(--line)}.subject-symbol{flex-shrink:0;place-items:center;width:32px;height:32px;display:grid}.subject-symbol img{object-fit:contain;width:25px;height:25px}.subject-name{min-width:0;font-size:13px;font-weight:500}.subject-name small{color:var(--muted);margin-top:3px;font-size:10px;font-weight:400;display:block}.subject-count{color:var(--muted);margin-left:auto;font-family:IBM Plex Mono,monospace;font-size:11px}.subject-sql{color:#a0781d}.subject-html{color:#c76754}.subject-css{color:#278291}.subject-network{color:#80639f}.subject-python,.subject-all{color:var(--primary-ink)}:root[data-theme=dark] .subject-sql{color:#e4c46a}:root[data-theme=dark] .subject-html{color:#eba89a}:root[data-theme=dark] .subject-css{color:#82c8cf}:root[data-theme=dark] .subject-network{color:#c5aee4}.library-profile{border-top:1px solid var(--line);flex-direction:column;gap:5px;margin-top:28px;padding-top:20px;display:flex}.library-profile strong{overflow-wrap:anywhere;font-size:12px;font-weight:500}.library-profile>span:not(.panel-kicker){color:var(--muted);overflow-wrap:anywhere;font-size:10px}.library-profile .student-id{font-family:IBM Plex Mono,monospace}.library-section-heading{justify-content:space-between;align-items:center;gap:14px;margin-bottom:22px;display:flex}.library-section-heading h2{margin:0;font-size:23px}.library-section-heading>span{color:var(--muted);font-size:12px}.library-toolbar{gap:12px;margin-bottom:15px;display:flex}.library-search{border:1px solid var(--input-border);background:var(--surface);min-width:0;color:var(--muted);border-radius:4px;flex:1;align-items:center;gap:10px;padding:0 12px;display:flex}.library-search input{width:100%;min-width:0;min-height:45px;color:var(--ink);outline-offset:-2px;background:0 0;border:0;padding:8px 0;font-size:14px}.library-search input::-webkit-search-cancel-button{display:none}.library-search button{color:var(--muted);background:0 0;border:0;flex-shrink:0;place-items:center;width:28px;height:32px;padding:0;display:grid}.library-toolbar select{border:1px solid var(--input-border);background:var(--surface);width:185px;min-height:45px;color:var(--ink);border-radius:4px;padding:8px 11px;font-size:12px}.library-filters{width:fit-content;max-width:100%;margin-bottom:22px}.library-filters button{min-height:35px;padding:7px 14px;font-size:12px}.library-filters button:disabled{opacity:.5;cursor:not-allowed}.library-exam-list{border-top:1px solid var(--line)}.library-exam-row{border-bottom:1px solid var(--line);align-items:center;gap:15px;padding:20px 0;display:flex}.exam-row-icon{background:var(--soft-bg);border-radius:4px;flex-shrink:0;place-items:center;width:41px;height:44px;display:grid}.exam-row-main{flex:1;min-width:0}.exam-row-subject{color:var(--muted);flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:4px;font-size:10px;display:flex}.exam-status{background:var(--soft-bg);color:var(--muted);border-radius:3px;padding:2px 7px;font-size:9px}.exam-status.finished{background:var(--success-bg);color:var(--success)}.exam-status.in-progress{background:var(--warning-bg);color:var(--warning-ink)}.exam-row-main h3{overflow-wrap:anywhere;margin:0 0 6px;font-size:16px}.exam-row-meta{color:var(--muted);flex-wrap:wrap;gap:13px;font-size:11px;display:flex}.exam-row-meta span{align-items:center;gap:5px;display:inline-flex}.exam-row-meta svg{width:13px;height:13px}.exam-row-meta .best-score{color:var(--success)}.exam-row-actions{flex-shrink:0;gap:8px;display:flex}.exam-row-actions .button{min-height:38px;padding:8px 11px;font-size:11px}.library-empty{text-align:center;border-block:1px solid var(--line);padding:60px 15px}.library-empty>svg{width:35px;height:35px;color:var(--muted);margin-bottom:15px}.library-empty h3{font-size:17px}.library-empty p{color:var(--muted);font-size:12px}.library-error{color:var(--red);justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px;padding:12px 0;font-size:12px;display:flex}.breadcrumb{color:var(--muted);align-items:center;gap:8px;margin-bottom:18px;font-size:11px;display:flex}.breadcrumb button{font:inherit;color:inherit;background:0 0;border:0;padding:0}.breadcrumb svg{width:13px;height:13px}.exam-top{border-bottom:1px solid var(--line);justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:28px;padding-bottom:25px;display:flex}.exam-top h1{font-size:27px}.student-line{color:var(--muted);margin:0;font-size:12px}.student-line strong{color:var(--ink);font-weight:500}.status-pill{background:var(--primary-light);color:var(--primary-ink);white-space:nowrap;border-radius:4px;align-items:center;gap:7px;padding:5px 10px;font-size:10px;display:inline-flex}.status-pill:before{content:"";background:currentColor;border-radius:50%;width:5px;height:5px}.status-pill.warning{color:var(--warning-ink);background:var(--warning-bg)}.work-layout{grid-template-columns:minmax(0,1fr) 270px;align-items:start;gap:40px;display:grid}.section-banner{background:var(--section-bg);border-left:3px solid var(--primary);justify-content:space-between;align-items:center;gap:16px;margin-bottom:10px;padding:13px 16px;display:flex}.section-banner h2{margin:0;font-size:14px}.section-banner span{color:var(--muted);font-size:10px}.section-banner.second{background:var(--warning-bg);border-color:var(--warning-border);margin-top:36px}.question{border-bottom:1px solid var(--line);padding:24px 0 28px;scroll-margin-top:30px}.question-heading{align-items:center;gap:11px;margin-bottom:13px;display:flex}.question-heading strong{color:var(--primary-ink);font-size:16px}.question-heading span{color:var(--muted);font-size:12px}.question p{white-space:pre-wrap;overflow-wrap:anywhere;margin-bottom:13px;font-size:17px;line-height:1.75}pre{background:var(--code-bg);border:1px solid var(--code-border);border-left:3px solid var(--code-edge);tab-size:4;border-radius:3px;margin:13px 0;padding:16px 18px;font-family:IBM Plex Mono,monospace;font-size:15px;line-height:1.8;overflow-x:auto}.options{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:17px;display:grid}.option{background:var(--surface);border:1px solid var(--line);cursor:pointer;border-radius:4px;align-items:center;gap:10px;min-height:50px;padding:13px 15px;font-size:16px;display:flex}.option:hover{border-color:var(--hover-line)}.option:has(input:checked){background:var(--primary-light);border-color:var(--primary)}.option input{width:18px;height:18px;accent-color:var(--primary);flex-shrink:0;margin:0}.option .letter{color:var(--muted);font-family:IBM Plex Mono,monospace;font-size:16px}.option-text{white-space:pre-wrap;overflow-wrap:anywhere;min-width:0}.options.code-options{grid-template-columns:1fr}.code-options .option-text{font-family:IBM Plex Mono,monospace;line-height:1.8}.truth-row{border-bottom:1px solid var(--line);grid-template-columns:minmax(0,1fr) 65px 65px;align-items:center;gap:10px;padding:13px 0;font-size:16px;display:grid}.truth-header{color:var(--muted);padding-top:18px;font-size:13px}.truth-header span:not(:first-child){text-align:center}.truth-label{cursor:pointer;justify-content:center;align-items:center;min-height:44px;display:flex}.truth-label input{width:20px;height:20px;accent-color:var(--primary);cursor:pointer;margin:0}.truth-text{overflow-wrap:anywhere}.truth-text strong{color:var(--primary-ink);margin-right:5px;font-weight:500}.work-sidebar{border-top:3px solid var(--primary);padding-top:18px;position:sticky;top:24px}.timer-label{color:var(--muted);align-items:center;gap:7px;margin-bottom:4px;font-size:10px;display:flex}.timer-label svg{width:14px;height:14px}.timer{color:var(--primary-ink);font-family:IBM Plex Mono,monospace;font-size:38px;font-weight:500;line-height:1.4}.timer.urgent{color:var(--red)}.timer-divider{justify-content:space-between;margin:18px 0 8px;font-size:11px;display:flex}.timer-divider strong{color:var(--primary-ink);font-size:12px}.progress-track{background:var(--track);height:4px;margin-bottom:23px;overflow:hidden}.progress-fill{background:var(--primary);height:100%;transition:width .15s}.question-map{border:0}.question-map 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