:root{--ink:#182b4a;--muted:#596a82;--blue:#173d91;--blue-bright:#2557ba;--line:#dbe2ed;--paper:var(--background);--red:#a13040;--amber:#f4b844;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,sans-serif;font-size:16px;line-height:1.7}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--amber);outline-offset:3px}a{color:var(--blue)}h1,h2,h3,p{margin-top:0}h1{letter-spacing:.02em;margin-bottom:1.2rem;font-size:2.25rem;line-height:1.45}h2{margin-bottom:.5rem;font-size:1.3rem;line-height:1.6}h3{margin-top:1.5rem;font-size:1.1rem}p{margin-bottom:1rem}small{font-size:.875rem}input,textarea,select{border:1px solid var(--control-border);color:var(--ink);background:#fff;border-radius:8px;width:100%;min-height:48px;margin:.5rem 0 1rem;padding:.75rem;display:block}textarea{resize:vertical;word-break:break-all}label{font-size:1rem;font-weight:600;display:block}table{border-collapse:collapse;white-space:nowrap;width:100%;font-size:.95rem}th{text-align:left;background:var(--background)}th,td{border-bottom:1px solid var(--line);padding:.75rem}.table-scroll{overflow-x:auto}.site-header{border-bottom:1px solid var(--line);background:#fff;justify-content:space-between;align-items:center;gap:1rem;height:auto;min-height:76px;padding:1rem max(1.25rem,50vw - 560px);display:flex}.brand{color:var(--ink);flex-wrap:wrap;align-items:center;gap:.65rem;font-size:1.15rem;font-weight:750;text-decoration:none;display:flex}.brand-mark{background:var(--blue);color:#fff;border-radius:9px;place-items:center;width:36px;height:36px;font-size:1.2rem;display:grid}.brand-sub{color:var(--muted);border-left:1px solid var(--line);padding-left:.7rem;font-size:.9rem;font-weight:500}.prototype-tag{border:1px solid var(--line);color:var(--muted);white-space:nowrap;border-radius:5px;padding:.2rem .65rem;font-size:.85rem}.workspace{max-width:1120px;margin:0 auto;padding:2rem 1.5rem 5rem}.student-workspace{max-width:800px;margin:0 auto;padding:2rem 1.5rem 5rem}.entrance{max-width:650px;margin:7vh auto;padding:2rem}.entrance h1{margin-top:1rem;font-size:3rem}.lead{color:var(--muted);font-size:1.125rem;line-height:1.9}.eyebrow{color:var(--blue);letter-spacing:.08em;margin-bottom:.5rem;font-size:.9rem;font-weight:700}.button{border:1px solid #0000;border-radius:9px;justify-content:center;align-items:center;gap:.5rem;min-height:52px;padding:.8rem 1.2rem;font-weight:700;line-height:1.5;text-decoration:none;transition:background .15s;display:inline-flex}.button.primary{background:var(--blue);color:#fff}.button.primary:hover:not(:disabled){background:var(--blue-bright)}.button.secondary{border-color:var(--control-border);color:var(--blue);background:#fff}.button.secondary:hover{background:var(--soft)}.button.ghost{color:var(--muted);background:0 0}.button.danger{background:var(--red);color:#fff}.button.white{color:var(--blue);background:#fff}.wide{width:100%;margin-top:.75rem}.panel{border:1px solid var(--line);background:#fff;border-radius:14px;margin-bottom:1.25rem;padding:1.75rem;box-shadow:0 2px 3px #11223e03}.auth-panel{max-width:620px;margin:1rem auto}.form-panel{max-width:850px;margin:auto}.divider{background:var(--line);height:1px;margin:1.75rem 0}.muted,.privacy-note{color:var(--muted);font-size:.9rem}.privacy-note{text-align:center;margin-top:1.5rem}.entrance-note{color:var(--muted);border-top:1px solid var(--line);margin-top:2.5rem;padding-top:1.3rem;font-size:.95rem}.secret{overflow-wrap:anywhere;background:var(--background);border:1px solid var(--line);-webkit-user-select:all;user-select:all;border-radius:8px;margin:1rem 0;padding:1rem;font-family:ui-monospace,monospace;font-size:1rem;line-height:1.7;display:block}.check{align-items:center;gap:.75rem;margin:1rem 0;font-weight:500;display:flex}.check input{accent-color:var(--blue);flex-shrink:0;width:22px;height:22px;min-height:22px;margin:0}.callout{background:var(--soft);border-left:4px solid var(--blue);color:var(--ink);border-radius:3px;padding:1rem}.page-heading{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1.5rem;display:flex}.page-heading h1{margin-bottom:0}.breadcrumbs{color:var(--muted);margin-bottom:1rem;font-size:.9rem}.breadcrumbs button{font:inherit;color:var(--blue);background:0 0;border:none;padding:.3rem 0}.lesson-banner{background:var(--soft);border:1px solid var(--border);border-radius:14px;justify-content:space-between;align-items:center;gap:2rem;margin-bottom:1.25rem;padding:1.75rem;display:flex}.lesson-banner p{margin-bottom:0}.lesson-banner.is-active{background:var(--blue);color:#fff;border-color:var(--blue)}.lesson-start{align-items:flex-end;gap:1rem;display:flex}.lesson-start input{margin-bottom:0}.lesson-start .button{max-width:230px}.student-url{justify-content:space-between;align-items:center;gap:1rem;display:flex}.student-url>div{min-width:0}.url{overflow-wrap:anywhere;color:var(--muted);font-size:.9rem;display:block}.student-url .button{flex-shrink:0}.section-heading{justify-content:space-between;align-items:center;gap:1rem;margin:1.75rem 0 .75rem;display:flex}.section-heading h2{margin:0}.group-table{padding:0;overflow:hidden}.group-status-row{text-align:left;border:none;border-bottom:1px solid var(--line);width:100%;color:var(--ink);background:#fff;grid-template-columns:1fr 1fr auto;align-items:center;gap:1rem;padding:1.25rem 1.75rem;display:grid}.group-status-row:last-child{border-bottom:0}.group-status-row:hover{background:var(--soft)}.group-status-row div{flex-wrap:wrap;align-items:center;gap:.75rem;display:flex}.group-status-row div span{color:var(--muted);font-size:.9rem}.status-chip{color:var(--muted);white-space:nowrap;background:#edf0f5;border-radius:5px;padding:.3rem .6rem;font-size:.85rem}.status-chip.blue{color:var(--blue);background:#e9efff}.class-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;display:grid}.class-card{border:1px solid var(--line);border-top:4px solid var(--blue);text-align:left;color:var(--ink);background:#fff;border-radius:12px;padding:1.75rem}.class-card p{justify-content:space-between;gap:1rem;margin-bottom:0;display:flex}.class-card h2{margin-top:.5rem;font-size:1.7rem}.empty{padding:3rem}.form-pair{grid-template-columns:1fr 2fr;gap:1rem;display:grid}.size-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:.75rem;margin:1rem 0 1.75rem;display:grid}.size-card{border:1px solid var(--line);border-radius:8px;padding:1rem}.size-card select{margin-bottom:.5rem}.size-card span{color:var(--muted);font-size:.85rem}.actions{justify-content:space-between;gap:1rem;margin-top:1.5rem;display:flex}.lesson-history{border-bottom:1px solid var(--line);align-items:center;gap:1rem;padding:.5rem 0;display:flex}.lesson-history input{width:auto;margin:.5rem 0}.lesson-history span{color:var(--muted);font-size:.9rem}.student-meta{color:var(--muted);justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1.5rem;font-size:.95rem;display:flex}.student-meta span:last-child{color:var(--blue);font-weight:700}.group-picker{grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;margin-top:1rem;display:grid}.pick-group{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:8px;align-items:center;gap:1rem;padding:1rem;display:flex}.pick-group small{color:var(--muted);margin-left:auto}.or-divider{text-align:center;color:var(--muted);margin:2rem 0;position:relative}.attendance-list{margin:1.5rem 0}.attendance-row{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:1rem;padding:.75rem 0;display:flex}.member-letter{background:var(--soft);border-radius:8px;flex-shrink:0;place-items:center;width:52px;height:52px;font-size:1.5rem;font-weight:750;line-height:1.3;display:inline-grid}.segments{gap:.5rem;display:flex}.segments button{border:1px solid var(--control-border);color:var(--ink);background:#fff;border-radius:8px;min-width:52px;min-height:52px;padding:.5rem 1rem;font-weight:650}.segments button.chosen{background:var(--blue);color:#fff;border-color:var(--blue)}.segments button.chosen.absent{background:var(--text-secondary);border-color:var(--text-secondary)}.attendance-row .segments button{min-width:100px}.parent-picker{grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin:1.5rem 0;display:grid}.parent-choice{border:2px solid var(--control-border);min-height:125px;color:var(--blue);background:#fff;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:.35rem;display:flex}.parent-choice strong{font-size:2.2rem}.parent-choice span{font-size:.95rem}.parent-choice:disabled{background:var(--secondary-soft);border:1px solid var(--line);color:var(--muted);opacity:1}.special-parent{border-top:1px solid var(--line);color:var(--muted);margin-top:2.5rem;padding:1.25rem}.special-parent p:last-child{margin-top:.75rem;margin-bottom:0}summary{cursor:pointer;min-height:32px;font-weight:600}details[open] summary{margin-bottom:1rem}.parent-badge{background:var(--soft);border:1px solid var(--control-border);color:var(--blue);border-radius:7px;margin-bottom:1rem;padding:.55rem 1.4rem;font-size:1.2rem;font-weight:700;display:inline-flex}.in-progress{text-align:center;padding:2.5rem 2rem}.progress-symbol{background:var(--soft);width:80px;height:80px;color:var(--blue);letter-spacing:.05em;border-radius:50%;place-items:center;margin:.5rem 0 1.25rem;font-size:3rem;line-height:1;display:inline-grid}.in-progress .muted{text-align:left}.member-line{gap:.75rem;margin:1.5rem 0;display:flex}.member-line span{background:var(--soft);width:48px;height:48px;color:var(--blue);border-radius:8px;place-items:center;font-size:1.2rem;font-weight:700;display:grid}.score-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:.75rem;margin:1.5rem 0;display:grid}.score-tile{border:1px solid var(--line);background:#fff;border-radius:10px;justify-content:space-between;align-items:baseline;gap:.5rem;padding:1rem 1.25rem;display:flex}.score-tile>span{color:var(--muted);font-size:1.2rem;font-weight:700}.score-tile strong{color:var(--blue);font-variant-numeric:tabular-nums;font-size:2rem;line-height:1.5}.score-tile small{color:var(--muted);margin-left:.35rem;font-size:.9rem;font-weight:500}.result-intro{align-items:center;gap:1rem;margin-bottom:1rem;display:flex}.result-intro p{color:var(--muted);font-size:.95rem}.result-intro .parent-badge{flex-shrink:0}.result-card-heading{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;margin-bottom:1.25rem;padding-bottom:1rem;display:flex}.turn-points{color:var(--muted);font-size:.95rem}.turn-points strong{color:var(--blue);margin-left:.5rem;font-size:1.7rem}.result-controls{grid-template-columns:1fr 1fr;gap:1.5rem;display:grid}.result-controls label{margin-bottom:.65rem;font-size:.95rem}.required{color:var(--red);margin-left:.5rem;font-size:.875rem}.correctness button{padding:.3rem 1.4rem;font-size:1.7rem;line-height:1.4}.result-controls .fooled{grid-column:1/-1}.wrapping{flex-wrap:wrap}.inactive-member{background:var(--secondary-soft);color:var(--muted);border-radius:10px;align-items:center;gap:1rem;margin-bottom:1rem;padding:1rem 1.75rem;display:flex}.save-bar{border-top:3px solid var(--blue);background:#fff;border-radius:8px;margin:1.5rem 0;padding:1.5rem}.save-bar p{color:var(--muted);font-size:.9rem}.student-footer{border-top:1px solid var(--line);justify-content:space-between;gap:1rem;margin-top:2rem;padding-top:1rem;display:flex}.student-footer button{min-height:48px;color:var(--muted);background:0 0;border:0;font-size:.95rem}.error{border:1px solid #d399a0;border-left:4px solid var(--red);color:#8b2233;background:#fff0f2;border-radius:8px;padding:1rem 1.25rem;font-size:1rem}.sticky-error{z-index:15;margin-top:1rem;position:sticky;bottom:1rem;box-shadow:0 4px 20px #12213a16}.modal-backdrop{z-index:25;background:#12213aa8;place-items:center;padding:1rem;display:grid;position:fixed;inset:0;overflow-y:auto}.modal{background:#fff;border-radius:15px;width:100%;max-width:580px;max-height:90vh;padding:2rem;overflow-y:auto}.confirm-group{text-align:center;background:var(--soft);border-radius:8px;margin:1rem 0;padding:1.5rem}.confirm-group h2{font-size:2rem}.turn-detail{border-top:1px solid var(--line);padding:1rem 0}@media (width<=760px){.workspace,.student-workspace{padding:1.5rem 1rem 4rem}.site-header{min-height:68px;padding:.85rem 1rem}.brand{gap:.45rem;font-size:1rem}.brand-sub{padding-left:.5rem;font-size:.85rem}.brand-mark{width:32px;height:32px}.panel{border-radius:11px;padding:1.25rem}h1{font-size:1.85rem}.page-heading{align-items:flex-start}.page-heading .button{font-size:.9rem}.lesson-banner{flex-direction:column;align-items:stretch;gap:1.25rem;padding:1.25rem}.lesson-start{align-items:stretch}.lesson-start label{flex:1;min-width:0}.lesson-start .button{flex:1;font-size:.9rem}.student-url{flex-direction:column;align-items:stretch}.group-table{padding:0}.group-status-row{grid-template-columns:1fr 1fr;gap:.5rem;padding:1rem}.group-status-row>div{flex-direction:column;align-items:flex-start;gap:.1rem}.group-status-row .status-chip{grid-column:1/-1;justify-self:start}.size-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.class-grid{grid-template-columns:1fr}.parent-picker{gap:.6rem}.parent-choice{min-height:105px}.result-controls{gap:1rem}.segments button{min-width:48px;min-height:50px;padding:.45rem .8rem}.correctness button{padding:.3rem 1rem}.result-card-heading{gap:.5rem}.result-intro{flex-direction:column;align-items:flex-start;gap:.1rem}.score-tile{padding:.75rem}.score-tile strong{font-size:1.6rem}.score-tile small{margin-left:.15rem;font-size:.8rem}.student-meta{font-size:.85rem}.modal{padding:1.5rem}.form-pair,.group-picker{grid-template-columns:1fr}.entrance{margin:4vh auto;padding:1.5rem}.entrance h1{font-size:2.5rem}.lesson-history{flex-wrap:wrap;gap:.5rem}}@media (width<=380px){.brand-sub{border:0;padding:0}.prototype-tag{padding:.15rem .35rem}.result-controls{grid-template-columns:1fr}.score-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.attendance-row .segments button{min-width:80px}.brand{max-width:250px}.score-tile strong{font-size:1.75rem}}@media (prefers-reduced-motion:reduce){*{transition:none!important}}.preservation-notice{white-space:pre-line;line-height:1.8}.short-code{text-align:center;letter-spacing:.12em;overflow-wrap:anywhere;font-size:clamp(1.6rem,6vw,2.4rem)}.draft-status{color:var(--muted);min-height:1.5em;font-size:.95rem}.cancelled-turn{background:#fffaf0;border:1px solid #e0ceae;border-radius:16px;margin:1.2rem 0;padding:1.2rem}.lesson-controls{flex-wrap:wrap;gap:.6rem;display:flex}.lesson-start{flex-wrap:wrap}.lesson-start input[type=number]{max-width:7rem}@media (width<=640px){.lesson-controls,.lesson-controls .button{width:100%}.cancelled-turn .actions{flex-direction:column}}.rank-label{margin-top:.4rem;font-size:.9rem;line-height:1.5;display:block}.bonus-label{background:var(--soft);color:var(--primary-text);border-radius:6px;padding:.25rem .5rem;font-size:.85rem;display:inline-block}.game-caption{color:var(--text-secondary);font-weight:700}.edit-member,.teacher-game,.export-item{border-bottom:1px solid var(--border);padding:1rem 0}.edit-member label{margin:.8rem 0 .4rem}.edit-member h3 small{font-size:1rem;font-weight:400}.rescue-actions{flex-wrap:wrap;margin:1rem 0 2rem}.attendance-history{border-bottom:1px solid var(--border);align-items:center;gap:1rem;padding:.7rem 0;display:flex}.attendance-history p{flex:1}.lesson-history{flex-wrap:wrap}.file-picker input{width:100%;padding:1rem}.modal{overscroll-behavior:contain;max-height:90dvh;overflow-y:auto}@media (width<=640px){.attendance-history{flex-direction:column;align-items:stretch;gap:.4rem}.rescue-actions .button{width:100%}}.status-chip.phase-unstarted{color:#334155;background:#e8edf2}.status-chip.phase-preparing{color:#684200;background:#fff1bd}.status-chip.phase-playing{color:#123b80;background:#dbeafe}.rank-winner{box-shadow:0 4px 14px #b57b0020;background:linear-gradient(140deg,#fff8d6,#fff)!important;border:3px solid #b57b00!important}.rank-winner .rank-label{color:#805300;font-size:1.4rem;font-weight:800}.rank-bonus{background:#eef7ff!important;border:2px solid #3475ad!important}.rank-bonus .bonus-label{color:#fff;background:#245b85;border-radius:.4rem;padding:.25rem .5rem}.code-instructions{border:2px solid #22639e;border-radius:.75rem;padding:1rem}.group-table .panel{margin:.5rem 0 1rem}.lesson-controls input{color:var(--text);max-width:8rem}.score-tile{flex-direction:column;justify-content:flex-start;align-items:flex-start;gap:.35rem;min-width:0;display:flex}.score-tile strong{white-space:nowrap}.score-tile>.rank-label{overflow-wrap:anywhere;max-width:100%;font-size:.9rem;font-weight:500}.score-tile>.bonus-label{overflow-wrap:anywhere;max-width:100%;font-size:.85rem}.score-tile.rank-winner>.rank-label{font-size:1.2rem;font-weight:800}@media (width<=640px){.score-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}.status-chip.phase-locked{color:#155b31;background:#d9f3e1}.attendance-guidance{border-width:5px;font-weight:600}.lesson-start{grid-template-columns:repeat(2,minmax(0,1fr));align-items:end;gap:1rem;min-width:0;display:grid}.lesson-start>p{grid-column:1/-1;margin:0}.lesson-start>.button{grid-column:1/-1;width:100%;max-width:none}.minute-control{min-width:0}.minute-presets{margin:.5rem 0}.minute-number{align-items:center;gap:.5rem;display:flex}.minute-number input{width:7rem;max-width:100%;margin:0}.lesson-banner.is-active .minute-control{color:var(--ink);background:#fff;border-radius:8px;padding:.75rem}@media (width<=760px){.lesson-start{flex-direction:column;align-items:stretch;width:100%;display:flex}.lesson-start>label,.lesson-start>.minute-control,.lesson-start>.button{flex:none;width:100%;max-width:none}.lesson-start>p{margin:0}.lesson-controls{width:100%;min-width:0}.lesson-controls>.button{width:100%}.minute-control>label{overflow-wrap:normal}}.merge-peer{border:1px solid var(--line);border-radius:8px;margin:1rem 0;padding:.5rem 1rem}.merge-members{border-top:1px solid var(--line);flex-wrap:wrap;gap:.25rem 1.5rem;display:flex}.merge-record p{margin:.35rem 0}.merge-instruction{font-weight:700}.answer-choices{margin:.6rem 0 1.2rem}.automatic-result{background:var(--soft);border-radius:8px;margin:1rem 0 0;padding:.75rem}.automatic-result small{color:var(--muted);display:block}.external-fooled{margin-top:1rem}.external-fooled select{max-width:12rem}.external-fooled small{font-weight:400}.accordion>summary{cursor:pointer;justify-content:space-between;align-items:center;gap:1rem;min-height:52px;margin:0;font-size:1.1rem;font-weight:700;list-style:none;display:flex}.accordion>summary::-webkit-details-marker{display:none}.accordion>summary:after{content:"›";flex:none;font-size:1.65rem;line-height:1;transition:transform .15s}.accordion[open]>summary:after{transform:rotate(90deg)}.accordion-content{min-width:0;padding-top:1rem}.accordion.student-url{display:block}.accordion.student-url .url{margin-bottom:1rem}.teacher-group-detail .section-heading{margin:0 0 .75rem}.teacher-group-detail .accordion{border-top:1px solid var(--line)}.teacher-group-detail{scroll-margin-top:6rem}.compact-game-summary td,.compact-game-summary th{padding:.5rem .75rem;font-size:.95rem}.teacher-game h3{margin-bottom:.35rem}.game-turn-records>summary{min-height:48px;margin-top:.5rem}.lesson-member-list{flex-wrap:wrap;gap:.65rem 1.25rem;margin-bottom:.75rem;display:flex}.button.compact{min-height:44px;padding:.35rem .65rem;font-size:.875rem;display:block}.turn-participation-list{flex-direction:column;align-items:flex-start;gap:.3rem;display:flex}.participation-toggle{flex-wrap:wrap}.participation-toggle button{white-space:nowrap;min-height:44px;font-size:.875rem}.lesson-review-table th{white-space:nowrap}.lesson-review-table td{vertical-align:top}.lesson-banner{grid-template-columns:minmax(0,1fr) minmax(0,1.6fr);align-items:start;display:grid}.lesson-banner>div,.lesson-start>label{min-width:0}.lesson-start input[type=date]{width:100%;min-width:0;max-width:100%}.lesson-start input[type=date]::-webkit-date-and-time-value{min-width:0}.lesson-controls{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:.75rem;min-width:0;display:grid}.lesson-controls>.minute-control,.lesson-controls>p{grid-column:1/-1}.lesson-controls>.button{align-self:start;min-width:0}.current-lesson-heading{flex-wrap:wrap;align-items:baseline;gap:.25rem .75rem;display:flex}.current-lesson-heading>span,.current-lesson-heading>time{white-space:nowrap}.current-lesson-heading>time{font-size:1.05rem;font-weight:650}.lesson-banner .reception-deadline{border:1px solid #ffffff70;border-radius:8px;flex-wrap:wrap;align-items:baseline;gap:.3rem .6rem;margin-top:.85rem;padding:.4rem .7rem;font-weight:650;display:inline-flex}.reception-deadline time{font-variant-numeric:tabular-nums;white-space:nowrap;font-size:1.25rem;font-weight:800}.group-reissue{margin:0 0 1rem}@media (width>=761px) and (width<=1024px){.lesson-banner:not(.is-active){grid-template-columns:1fr;gap:1.25rem}}@media (width<=760px){.lesson-banner,.lesson-controls{grid-template-columns:minmax(0,1fr)}}.merge-role-choices{grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;display:grid}.merge-role>.muted{margin:1rem 0 0}@media (width<=600px){.merge-role-choices{grid-template-columns:1fr}}.lesson-controls{grid-template-columns:minmax(0,1fr);gap:1rem}.lesson-controls>section{min-width:0}.lesson-controls h3{margin:0 0 .65rem;font-size:1.05rem}.lesson-banner .reception-management{border:1px solid var(--control-border);background:var(--surface);color:var(--text);border-radius:10px;padding:1rem}.lesson-banner .reception-management .reception-deadline{border-color:var(--control-border);background:var(--secondary-soft);width:fit-content;margin:0 0 .85rem;display:flex}.lesson-banner.is-active .reception-management .minute-control{background:0 0;padding:0}.lesson-operation-block{background:#ffffff10;border:1px solid #ffffff70;border-radius:10px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem 1rem;padding:1rem;display:flex}.lesson-operation-block h3{margin:0}.lesson-cancel-block{border-top:1px dashed #ffffff70;margin-top:.4rem;padding:1rem 0 0}.lesson-cancel-block h3{font-size:.9rem;font-weight:500}.lesson-cancel-block .button.ghost{color:var(--on-primary);background:0 0;border:1px solid #ffffff70;font-weight:500}.lesson-start{flex-direction:column;align-items:stretch;gap:1rem;width:100%;display:flex}.lesson-start-fields{grid-template-columns:repeat(2,minmax(0,1fr));align-items:stretch;column-gap:2rem;width:100%;min-width:0;display:grid}.lesson-start-field{background:var(--surface);border-radius:10px;flex-direction:column;justify-content:flex-end;min-width:0;max-width:100%;padding:1rem;display:flex;overflow:hidden}.lesson-start-field>label,.lesson-start-field>.minute-control{width:100%;min-width:0}.lesson-start-field input[type=date]{appearance:none;box-sizing:border-box;inline-size:100%;min-inline-size:0;max-inline-size:100%;margin-bottom:0}.lesson-start-field .minute-number input{flex:0 7rem;min-width:0}.lesson-start .button{width:100%;max-width:none}@media (width<=760px){.lesson-start-fields{grid-template-columns:minmax(0,1fr);row-gap:1rem}.lesson-operation-block .button,.lesson-cancel-block .button{width:100%}}.sticky-review-scroll{isolation:isolate;max-height:65vh;position:relative;overflow:auto}.sticky-review-table{border-collapse:separate;border-spacing:0}.sticky-review-table thead th{z-index:2;background:var(--soft);position:sticky;top:0}.sticky-review-table tr>:first-child{z-index:1;background:var(--surface);min-width:7rem;box-shadow:1px 0 0 var(--border);position:sticky;left:0}.sticky-review-table thead tr>:first-child{z-index:3;background:var(--soft)}.evaluation-bonus{color:var(--primary-text);font-size:.85rem;font-weight:700;display:block}.group-setting-row{border-bottom:1px solid var(--border);grid-template-columns:auto minmax(7rem,1fr) minmax(7rem,1fr) auto;align-items:center;gap:.75rem;padding:.75rem 0;display:grid}.group-setting-row>small{grid-column:2/-1}.group-setting-row select,.group-add select{margin-bottom:0}.group-add,.policy-game-fields{flex-wrap:wrap;align-items:end;gap:1rem;margin:1rem 0;display:flex}.group-add label,.policy-game-fields label{flex:1;min-width:9rem}.parent-policy-settings{border-bottom:1px solid var(--border);padding-bottom:1.5rem}@media (width<=760px){.group-setting-row{grid-template-columns:1fr 1fr}.group-setting-row>strong,.group-setting-row>small,.group-setting-row>.button{grid-column:1/-1}}.policy-game-override{flex-wrap:wrap;align-items:end;gap:.75rem;width:100%;display:flex}.policy-game-override label{flex:1;min-width:8rem}:root,[data-theme=A]{--primary:#2f6b4f;--primary-text:#2f6b4f;--primary-hover:#24563e;--accent:#94a695;--background:#f8f4eb;--surface:#fffdf8;--soft:#e7f0e8;--secondary-soft:#eee8dd;--border:#d5ddcf;--control-border:#94a695;--text:#25362d;--text-secondary:#536458;--bonus-bg:#edf2e8;--bonus-border:#94a695}[data-theme=B]{--primary:#b85c47;--primary-text:#983f2e;--primary-hover:#9c4937;--accent:#8ea88a;--background:#fbf7f2;--surface:#fffdfa;--soft:#f6e9df;--secondary-soft:#edf0e5;--border:#dfd3ca;--control-border:#b49e90;--text:#392b28;--text-secondary:#675c55;--bonus-bg:#edf0e5;--bonus-border:#8ea88a}[data-theme=C]{--primary:#4a456e;--primary-text:#4a456e;--primary-hover:#393554;--accent:#8b86c0;--background:#f2f2fa;--surface:#fff;--soft:#eeedf8;--secondary-soft:#e4e7f2;--border:#b9b6ce;--control-border:#9b97b4;--text:#29283d;--text-secondary:#625f77;--bonus-bg:#eff2ec;--bonus-border:#8ea88a}[data-theme=D]{--primary:#3a3a36;--primary-text:#3a3a36;--primary-hover:#272723;--accent:#d4b15a;--background:#f8f6f1;--surface:#fff;--soft:#f1eee5;--secondary-soft:#eae2d1;--border:#c5baa5;--control-border:#a59c89;--text:#30302d;--text-secondary:#656359;--bonus-bg:#f4efdf;--bonus-border:#b8a36c}[data-theme=E]{--primary:#925e79;--primary-text:#865570;--primary-hover:#78465f;--accent:#a8758f;--background:#faf7f5;--surface:#fff;--soft:#f5eaf0;--secondary-soft:#f1eef5;--border:#dfd6dc;--control-border:#b199a6;--text:#323746;--text-secondary:#626b7b;--bonus-bg:#f1eef5;--bonus-border:#8a96aa}:root{--ink:var(--text);--muted:var(--text-secondary);--blue:var(--primary-text);--blue-bright:var(--primary-hover);--line:var(--border);--paper:var(--background);--gold:#c18a22;--gold-text:#795510;--silver:#717d89;--on-primary:#fff}body{background:var(--background);color:var(--text)}.button.primary,.segments .chosen,.brand-mark,.lesson-banner.is-active{background:var(--primary);color:var(--on-primary)}.segments button.chosen:not(.absent){background:var(--primary);border-color:var(--primary);color:var(--on-primary)}.lesson-banner.is-active{border-color:var(--primary)}.lesson-banner.is-active .eyebrow{color:var(--on-primary)}.lesson-banner.is-active .button.white{background:var(--surface);color:var(--primary-text)}.callout,.parent-badge,.progress-symbol,.member-line span,.member-letter,.automatic-result{background:var(--soft)}.parent-badge{border-color:var(--control-border)}.panel,.class-card,.group-status-row,.parent-choice,.score-tile,.modal,.save-bar,.site-header{background:var(--surface)}.game-caption{color:var(--text-secondary)}.score-tile>.bonus-label{background:var(--primary);color:var(--on-primary)}.rank-bonus{background:var(--bonus-bg)!important;border-color:var(--bonus-border)!important}.rank-bonus .bonus-label{background:var(--primary);color:#fff}.rank-winner{box-shadow:none;background:var(--surface)!important;border-color:var(--gold)!important}.code-instructions{border-color:var(--primary)}.header-controls{flex-shrink:0;align-items:center;gap:.6rem;display:flex}.theme-control{z-index:22;color:var(--text);position:relative}.theme-control>summary{border:1px solid var(--control-border);background:var(--surface);border-radius:8px;justify-content:center;align-items:center;gap:.35rem;min-width:44px;min-height:44px;padding:.35rem .6rem;font-size:.875rem;list-style:none;display:flex;margin:0!important}.theme-control>summary::-webkit-details-marker{display:none}.theme-popover{background:var(--surface);border:1px solid var(--control-border);border-radius:12px;width:290px;max-width:calc(100vw - 2rem);padding:.85rem;position:absolute;top:calc(100% + .5rem);right:0;box-shadow:0 8px 24px #0002}.theme-popover p{color:var(--text-secondary);margin:.65rem 0 0;font-size:.875rem;line-height:1.6}.theme-swatches{gap:.4rem;display:flex}.theme-swatch{background:0 0;border:2px solid #0000;border-radius:9px;width:46px;min-width:44px;height:46px;padding:6px;position:relative}.theme-swatch.is-selected{border-color:var(--primary-text);background:var(--soft)}.swatch-color{border:1px solid #0002;border-radius:50%;width:30px;height:30px;display:block}.swatch-check{background:var(--surface);color:var(--primary-text);border-radius:50%;position:absolute;bottom:0;right:0}@media (width<=480px){.header-controls .prototype-tag,.theme-control>summary span{display:none}.site-header{gap:.4rem}.brand{font-size:1rem}.brand-sub{font-size:.8rem}}.teacher-page-nav{top:env(safe-area-inset-top,0px);z-index:20;overscroll-behavior-x:contain;-webkit-overflow-scrolling:touch;background:var(--surface);border:1px solid var(--line);scrollbar-width:thin;border-radius:10px;gap:.5rem;margin:0 0 1.25rem;padding:.4rem;display:flex;position:sticky;overflow-x:auto;box-shadow:0 2px 8px #0000000c}.teacher-page-nav a{white-space:nowrap;min-height:48px;color:var(--text-secondary);border:1px solid #0000;border-radius:7px;flex:1 0 auto;justify-content:center;align-items:center;padding:.4rem 1rem;font-size:.95rem;font-weight:600;text-decoration:none;display:flex}.teacher-page-nav a[aria-current=location]{background:var(--soft);border-color:var(--control-border);color:var(--primary-text)}.teacher-page-section,#teacher-lessons{scroll-margin-top:5.5rem}.record-refresh{white-space:nowrap;min-height:44px}.record-refresh span{font-size:1.35rem;line-height:1}.record-refresh-bottom{justify-content:flex-end;margin:.75rem 0 1.5rem;display:flex}#teacher-records>.section-heading{flex-wrap:wrap}#teacher-output>.button{margin-bottom:1rem}@media (width<=480px){.teacher-page-nav{margin-left:-.25rem;margin-right:-.25rem}.teacher-page-nav a{flex:none;min-width:7rem;min-height:52px;padding:.5rem 1rem;font-size:.95rem}#teacher-records>.section-heading{gap:.5rem}#teacher-records>.section-heading h2{font-size:1.1rem}#teacher-records>.section-heading .record-refresh{margin-left:auto}}.score-member{width:100%;color:var(--text-secondary);justify-content:space-between;align-items:center;gap:.5rem;font-size:1.2rem;font-weight:750;display:flex}.rank-cup{flex:none;width:28px;height:28px}.cup-gold,.rank-laurel{color:var(--gold)}.cup-silver{color:var(--silver)}.rank-cup path:first-child{fill:currentColor;fill-opacity:.18}.score-tile.rank-winner{border-width:1px!important}.score-tile.rank-winner.rank-final{background:linear-gradient(135deg,#fff9e7,var(--surface))!important;border-width:3px!important}.score-tile.rank-winner.rank-final>.rank-label{color:var(--gold-text);font-size:1.35rem;font-weight:800}.rank-score-line{justify-content:center;align-items:center;gap:.1rem;width:100%;min-width:0;margin:.35rem 0;display:flex}.rank-laurel{flex:0 0 30px;width:30px;height:76px}.laurel-right{transform:scaleX(-1)}.score-tile.rank-final .rank-score-line strong{text-align:center;font-size:clamp(2.1rem,5.7vw,3rem);line-height:1.2}.rank-score-line strong small{margin-left:.15rem;font-size:.85rem}.score-tile.rank-final.rank-bonus{border-width:2px!important}@media (width<=480px){.rank-laurel{flex-basis:23px;width:23px;height:64px}.score-tile.rank-winner.rank-final{padding:.7rem}.score-tile.rank-final .rank-score-line strong{font-size:2.1rem}.rank-score-line strong small{font-size:.75rem}.rank-cup{width:26px;height:26px}}@media (width<=340px){.score-grid{grid-template-columns:1fr}}:is([data-theme=C],[data-theme=D]) :is(.panel,.class-card,.parent-choice,.save-bar,.merge-peer){box-shadow:0 2px 6px #2523380b}:is([data-theme=C],[data-theme=D]) :is(.callout,.automatic-result,.inactive-member){border:1px solid var(--border)}:is([data-theme=C],[data-theme=D]) .callout{border-left:4px solid var(--primary-text)}:is([data-theme=C],[data-theme=D]) .merge-peer{background:var(--surface)}.teacher-workspace .class-card{border-top-color:var(--accent)}.teacher-workspace :is(.student-url,#teacher-settings){background:var(--secondary-soft);border-left:4px solid var(--accent)}.teacher-workspace :is(.section-heading h2,.export-item h3){border-left:4px solid var(--accent);padding-left:.65rem}.teacher-workspace .button.secondary{background:var(--secondary-soft)}.teacher-workspace .button.secondary:hover{background:var(--soft)}.teacher-workspace .group-status-row[aria-expanded=true]{background:var(--secondary-soft);box-shadow:inset 4px 0 var(--accent)}.teacher-workspace .teacher-page-nav a[aria-current=location]{background:var(--secondary-soft);border-color:var(--accent)}.teacher-workspace .minute-presets button:not(.chosen){background:var(--secondary-soft)}.minute-control .minute-description{color:var(--text-secondary);margin:.3rem 0 .6rem;font-size:.9rem;font-weight:400;line-height:1.6}.cup-bronze{color:#a96837}.rank-laurel.laurel-silver{color:var(--silver)}.score-tile.rank-second.rank-final{box-shadow:0 3px 10px #47556912;background:linear-gradient(135deg,#f1f4f7,var(--surface))!important;border:2px solid #8c969f!important}.score-tile.rank-second.rank-final>.rank-label{color:#46535f;font-size:1.25rem;font-weight:800}.score-tile.rank-third.rank-final>.rank-label{color:#80512e;font-size:1.15rem;font-weight:800}.score-tile.rank-third.rank-final>strong{font-size:2.2rem}.score-tile.rank-second.rank-final .rank-score-line strong{font-size:clamp(1.9rem,5vw,2.65rem)}.parent-bonus-celebration{border:1px solid var(--gold);color:#6c4a12;background:#fff9e7;border-radius:10px;padding:1rem 1.25rem}.parent-bonus-celebration>strong{font-size:1.15rem}.parent-bonus-celebration p{margin:.4rem 0;font-weight:700}.turn-outcome-tile .turn-delta{font-size:1rem;font-weight:500}.turn-outcome-tile .turn-delta strong{font-size:1.65rem}.turn-outcome-tile .cumulative-score{font-size:1rem;font-weight:500}.turn-outcome-tile .cumulative-score strong{font-size:1.75rem}.group-live-scores{color:var(--muted);grid-column:1/-1;margin-top:-.35rem;font-size:.85rem}.member-line{flex-wrap:wrap}@media (width<=760px){.group-live-scores{display:none}.score-tile.rank-third.rank-final>strong{font-size:1.9rem}.score-tile.rank-second.rank-final .rank-score-line strong{font-size:1.95rem}}@media (width<=600px){.student-workspace .score-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=340px){.student-workspace .score-grid{grid-template-columns:1fr}}.student-workspace .turn-outcome-tile .cumulative-score{flex-direction:column;gap:.25rem;font-weight:500;display:flex}.student-workspace .turn-outcome-tile .cumulative-score>small{color:var(--muted);font-size:.9rem}.student-workspace .turn-outcome-tile .cumulative-score>strong{color:var(--primary);font-size:2.9rem;line-height:1.2}.student-workspace .turn-outcome-tile .cumulative-score strong small{margin-left:.3rem;font-size:1rem}.student-workspace .turn-outcome-tile .rank-label{font-size:1.1rem;font-weight:700}.student-workspace .turn-outcome-tile .turn-delta{font-size:.9rem;font-weight:400}.student-workspace .turn-outcome-tile .turn-delta strong{font-size:1.05rem;font-weight:600}.student-workspace .turn-outcome-tile.earned-parent-bonus{background:var(--secondary-soft);border:2px solid var(--primary)}.student-workspace .turn-parent-bonus{background:var(--primary);color:#fff;border-radius:999px;padding:.25rem .45rem;font-size:.7rem}@media (width<=600px){.student-workspace .turn-outcome-tile .cumulative-score>strong{font-size:2.3rem}.student-workspace .turn-outcome-tile .score-member{flex-wrap:wrap;gap:.35rem}}.group-live-scores{flex-wrap:wrap;align-items:center;gap:.35rem;margin-top:0;display:flex}.group-score-chip{border:1px solid var(--border);background:var(--secondary-soft);white-space:nowrap;border-radius:6px;align-items:baseline;gap:.35rem;padding:.1rem .5rem;line-height:1.55;display:inline-flex}.group-score-chip strong{color:var(--text);font-variant-numeric:tabular-nums;font-size:.95rem}.group-score-explanation{margin:0 0 .6rem}[data-theme=D] .parent-bonus-celebration{background:var(--primary);color:var(--on-primary);border:2px solid var(--accent)}[data-theme=D] .parent-bonus-celebration>strong{color:var(--on-primary)}[data-theme=D] .parent-bonus-celebration .bonus-gain{color:var(--accent)}@media (width<=760px){.group-live-scores,.group-score-explanation{display:none}}.score-tile.rank-third.rank-final{border:1.5px solid #b77948!important}.brand{flex-wrap:nowrap;min-width:0}.brand-mark,.brand-name{flex-shrink:0}.brand-name{white-space:nowrap}.brand-info{border-left:1px solid var(--line);flex-direction:column;gap:.1rem;padding-left:.7rem;display:flex}.brand-info .brand-sub{white-space:nowrap;border:0;padding-left:0}.author-credit{color:var(--muted);white-space:nowrap;align-items:center;gap:.3rem;font-size:.8125rem;font-weight:500;line-height:1.3;display:inline-flex}.author-seal{color:#9f6079;flex-shrink:0;width:24px;height:24px}.group-settings-target{scroll-margin-top:7rem}.group-settings-target:focus-visible{outline:2px solid var(--primary);outline-offset:4px}.group-settings-entry{margin-bottom:.25rem}.game-unlock-entry{margin:.5rem 0 1rem}@media (width<=760px){.brand{grid-template-columns:32px minmax(0,1fr);gap:.1rem .45rem;display:grid}.brand-mark{grid-row:1/3}.brand-info{border:0;flex-flow:wrap;grid-column:2;align-items:center;gap:.2rem .6rem;padding:0}.author-seal{width:22px;height:22px}.brand-info .brand-sub{font-size:.8rem}}@media (width<=350px){.brand-info{flex-direction:column;align-items:flex-start;gap:0}}.student-workspace .turn-outcome-tile.turn-parent{border:2px solid var(--primary)}.student-workspace .turn-parent-role{background:var(--secondary-soft);color:var(--text);border-radius:.4rem;padding:.3rem .6rem;font-size:.9rem;font-weight:700;line-height:1.35}.score-tile>.bonus-label{background:var(--primary);color:#fff;padding:.4rem .65rem;font-size:.95rem;font-weight:700;line-height:1.4}.no-game-start-warning{color:var(--danger,#a32940);font-weight:600}.local-workspace{max-width:900px}.local-save-status{text-align:right;min-height:1.8rem;color:var(--muted);margin-bottom:1rem;font-size:.9rem}.local-storage-note{margin:1.5rem 0;font-size:.9rem}.local-workspace .button+.button{margin:.6rem 0 0}.local-workspace .actions{flex-wrap:wrap}.local-workspace .actions .button+.button{margin:0}.resume-scores{flex-wrap:wrap;gap:.65rem;margin:1rem 0;display:flex}.resume-scores>span{background:var(--soft);border-radius:8px;padding:.5rem .8rem}.resume-scores strong{color:var(--blue);font-size:1.3rem}.record-scores{grid-template-columns:minmax(0,1fr);gap:.6rem;margin:1rem 0;display:grid}.record-scores>div{background:var(--soft);border-radius:8px;flex-direction:row;align-items:center;gap:1rem;padding:.65rem 1rem;font-size:1.3rem;display:flex}.record-scores strong{text-align:center;flex:0 0 2rem;font-size:1.05rem}.peer-sizes{grid-template-columns:repeat(3,minmax(0,1fr));gap:.5rem 1rem;display:grid}.peer-sizes label{font-size:.9rem}.peer-sizes select{margin-bottom:.2rem}.local-workspace .form-pair{gap:1.5rem}.local-workspace .turn-parent-role{padding:.25rem .6rem;font-size:1rem}.local-workspace .score-member{flex-wrap:wrap}.local-workspace .theme-control>summary{min-height:44px}@media (width<=600px){.peer-sizes{grid-template-columns:repeat(2,minmax(0,1fr))}.local-workspace .student-meta{flex-wrap:wrap;gap:.3rem .8rem}.local-workspace .attendance-row{align-items:flex-start}.local-workspace .segments button{min-width:46px;padding:.45rem .6rem}.local-workspace .button{white-space:normal}.local-workspace .actions{flex-direction:column}}.session-choices{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin:1.2rem 0;display:grid}.local-workspace .session-choices .button{min-height:64px;margin:0}.restore-turn{border:1px solid var(--line);border-radius:12px;margin:1.5rem 0;padding:1rem}.restore-members{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;display:grid}.restore-member{border:1px solid var(--line);border-radius:10px;min-width:0;padding:.8rem}.restore-member>strong{margin-bottom:.5rem;font-size:1.4rem;display:block}.restore-member small{font-size:1rem}.restore-member label{font-size:.9rem}.restore-merge{background:var(--soft);border-radius:10px;margin:1rem 0;padding:1rem}.restoration .resume-scores small{display:block}.restoration .segments{margin-bottom:1rem}.restoration .check{align-items:center}.restoration input,.restoration select{min-width:0;max-width:100%}@media (width<=600px){.session-choices,.restore-members{grid-template-columns:1fr}.local-workspace .session-choices .button{min-height:60px}.restore-turn{padding:.8rem}.restoration .form-pair{gap:1rem}}.restored-score-inputs{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;display:grid}.restored-score-inputs input{min-width:0;max-width:100%}.final-record-check{border:1px solid var(--border);border-radius:12px;margin:1.5rem 0;padding:1rem}.final-record-check label{cursor:pointer;align-items:center;gap:.6rem;margin:.85rem 0;display:flex}.final-record-check input[type=checkbox]{flex-shrink:0;width:1.2rem;height:1.2rem}.local-workspace .parent-choice.selected-parent{background:var(--blue);color:#fff;border:2px solid var(--blue);box-shadow:0 0 0 2px var(--paper),0 0 0 4px var(--blue)}.local-workspace .parent-choice.selected-parent span{color:inherit}.peer-rows{gap:1rem;margin:1rem 0;display:grid}.peer-row{border-bottom:1px solid var(--line);padding-bottom:.75rem}.transcription-merge{border:2px solid var(--blue);background:var(--soft);color:var(--blue);border-radius:10px;margin:1rem 0;padding:1rem}.transcription-merge strong{font-size:1.2rem;display:block}.transcription-merge p{margin:.4rem 0 0;font-weight:600}.restore-merge-choices button{white-space:normal}.restore-game-number{flex-wrap:wrap;align-items:center;gap:.5rem;margin:1rem 0;font-weight:600;display:flex}.restore-game-number input{width:5.5rem;min-width:0;margin:0}.restore-merge-turns{gap:.6rem;margin:1rem 0;display:grid}.restore-merge-turn{border:1px solid var(--line);border-radius:8px;padding:.75rem}.restore-merge-heading{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;display:flex}.restore-merge-turn .segments{margin-top:.75rem}.restoration .error{white-space:pre-line}