:root{color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,Noto Sans JP,Yu Gothic,Hiragino Kaku Gothic ProN,sans-serif;color:#172429;background:#f6f7f4;font-synthesis:none;text-rendering:optimizeLegibility;--page: #f6f7f4;--surface: #ffffff;--surface-soft: #f9faf8;--ink: #172429;--muted: #667479;--line: #dde3e1;--line-strong: #c8d1ce;--action: #176b68;--action-hover: #105b58;--action-pale: #e4f1ef;--absent: #b74a3a;--absent-pale: #fbeae6;--present: #2d7253;--present-pale: #e8f2ec;--waiting: #8a6a2b;--waiting-pale: #f6efdf;--focus: #1d6fd8;--danger: #a43e31;--radius-control: 10px;--radius-panel: 14px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 24px;--space-6: 32px;--space-7: 40px;--space-8: 48px}*{box-sizing:border-box}html{min-width:320px;min-height:100%;background:var(--page)}body{min-width:320px;min-height:100vh;margin:0;background:var(--page);color:var(--ink);font-size:16px;line-height:1.55}body:has(dialog[open]){overflow:hidden}button,input,textarea,select{font:inherit}button,summary,a{-webkit-tap-highlight-color:transparent}button{color:inherit}a{color:var(--action)}h1,h2,h3,p,dl,dd{margin-top:0}h1,h2,h3,strong{letter-spacing:.01em}h1{font-size:clamp(1.55rem,4vw,2rem);line-height:1.25}h2{font-size:1.2rem;line-height:1.35}h3{font-size:1.02rem;line-height:1.4}:focus-visible{outline:3px solid color-mix(in srgb,var(--focus) 72%,transparent);outline-offset:2px}::selection{background:#cbe3e0}.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.eyebrow{margin-bottom:5px;color:var(--action);font-size:.72rem;font-weight:750;letter-spacing:.08em}.muted-copy{color:var(--muted)}.button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:var(--radius-control);padding:9px 16px;font-weight:700;line-height:1.25;text-decoration:none;cursor:pointer;transition:background-color .15s ease,border-color .15s ease,color .15s ease}.button:disabled,button:disabled{cursor:not-allowed;opacity:.58}.button--primary{background:var(--action);color:#fff}.button--primary:hover:not(:disabled){background:var(--action-hover)}.button--secondary{border-color:var(--line-strong);background:var(--surface);color:var(--ink)}.button--secondary:hover:not(:disabled){border-color:#9eafaa;background:var(--surface-soft)}.button--danger{border-color:var(--danger);background:var(--danger);color:#fff}.button--danger:hover:not(:disabled){border-color:#8e3328;background:#8e3328}.button--quiet{background:transparent;color:var(--action)}.button--quiet:hover:not(:disabled){background:var(--action-pale)}.button--full{width:100%;min-height:52px}.text-button{min-height:40px;display:inline-flex;align-items:center;gap:6px;border:0;background:transparent;color:var(--action);font-weight:700;cursor:pointer}.text-button:hover{text-decoration:underline}.icon-button{width:44px;height:44px;flex:0 0 auto;display:inline-grid;place-items:center;border:0;border-radius:9px;background:transparent;cursor:pointer}.icon-button:hover{background:#eef1ef}.spinner{width:18px;height:18px;display:inline-block;flex:0 0 auto;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.page-loading{min-height:100vh;display:flex;align-items:center;justify-content:center;gap:11px;color:var(--muted)}.skeleton-list{display:grid}.skeleton-row{min-height:75px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}.skeleton-row span{height:14px;border-radius:4px;background:#e7ebe9;animation:pulse 1.2s ease-in-out infinite alternate}.skeleton-row span:first-child{width:38%}.skeleton-row span:last-child{width:18%}@keyframes pulse{to{opacity:.45}}.notice{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--line);border-radius:var(--radius-control);padding:13px 14px;background:var(--surface-soft);color:var(--ink)}.notice>svg{flex:0 0 auto;margin-top:2px}.notice p{margin:0}.notice small{display:block;margin-top:5px;color:var(--muted)}.notice .text-button{margin-left:auto}.notice--error{border-color:#e7bbb4;background:#fff5f2;color:#7e3026}.notice--error ul{margin:7px 0 0;padding-left:20px}.notice--success{border-color:#bed9ca;background:#f0f8f3;color:#235c42}.notice--neutral{border-color:#cbd8d5;background:#f2f7f6}.field{display:grid;gap:7px}.field label{font-weight:700}.field input,.field textarea,.search-input input{width:100%;border:1px solid var(--line-strong);border-radius:var(--radius-control);background:var(--surface);color:var(--ink);font-size:16px}.field input{height:48px;padding:9px 12px}.field textarea{min-height:108px;resize:vertical;padding:11px 12px;line-height:1.6}.field input:hover,.field textarea:hover,.search-input:hover{border-color:#a5b3af}.field 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.icon-button{width:46px}.modal{width:100%;max-width:none;height:100%;max-height:none;margin:0;padding:0;border:0;background:transparent;overflow:hidden}.modal::backdrop{background:#131f237a;-webkit-backdrop-filter:blur(1px);backdrop-filter:blur(1px)}.modal__surface{width:min(100% - 32px,560px);max-height:min(84vh,760px);position:absolute;left:50%;top:50%;display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--radius-panel);background:var(--surface);box-shadow:0 18px 50px #15222733;transform:translate(-50%,-50%);overflow:hidden}.modal__header{min-height:74px;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);padding:16px 17px 14px 22px}.modal__header h2{margin-bottom:2px;font-size:1.18rem}.modal__header p{margin:0;color:var(--muted);font-size:.84rem}.modal--sheet .modal__surface{width:min(100%,480px);height:100%;max-height:100%;left:auto;right:0;top:0;border-width:0 0 0 1px;border-radius:0;transform:none}.student-number{min-width:2.2em;display:inline-grid;place-items:center;border-radius:6px;padding:2px 6px;background:#edf0ee;color:#4e5d61;font-size:.78rem;font-variant-numeric:tabular-nums;font-weight:750}.status-badge{min-height:27px;display:inline-flex;align-items:center;justify-content:center;gap:4px;border-radius:999px;padding:3px 9px;font-size:.76rem;font-weight:750;white-space:nowrap}.status-badge--present{background:var(--present-pale);color:var(--present)}.status-badge--absent{background:var(--absent-pale);color:var(--absent)}.status-badge--unsubmitted{background:var(--waiting-pale);color:var(--waiting)}.student-page{min-height:100vh;background:var(--page)}.student-page--centered{display:grid;place-items:center;padding:24px}.student-header{min-height:64px;display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--line);padding:10px 16px;background:#f6f7f4f5}.student-brand{min-height:44px;display:inline-flex;align-items:center;color:var(--ink);font-size:1.12rem;font-weight:800;letter-spacing:.04em;text-decoration:none}.student-main{width:min(100% - 32px,560px);margin:0 auto;padding:var(--space-5) 0 var(--space-7)}.student-intro{margin-bottom:var(--space-6);text-align:center}.student-intro h1{margin-bottom:var(--space-2);font-size:clamp(2.05rem,9vw,2.25rem);line-height:1.22;letter-spacing:-.025em}.student-intro>p:last-child{margin-bottom:0;color:var(--ink);font-size:1rem;font-weight:650}.student-intro__date-label{margin-bottom:var(--space-1);color:var(--muted);font-size:.8rem;font-weight:700;letter-spacing:.04em}.student-panel{margin-top:14px;border:1px solid var(--line);border-radius:var(--radius-panel);background:var(--surface)}.attendance-form{padding:0}.attendance-form 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strong{font-size:1.02rem}.name-select-button--selected{border-color:var(--line-strong);background:var(--surface);color:var(--action)}.name-select-button--selected:hover{border-color:var(--action);background:var(--action-pale)}.name-select-button--selected>svg:first-child,.name-select-button--selected>svg:last-child{color:var(--action)}.selected-student{min-height:64px;display:flex;align-items:center;gap:var(--space-3);margin-top:var(--space-2);border-radius:var(--radius-control);padding:var(--space-3) var(--space-4);background:var(--action-pale)}.selected-student>div{min-width:0;display:grid;flex:1;gap:3px}.selected-student__identity{min-width:0;display:flex;align-items:center;gap:9px}.selected-student__identity strong{font-size:1.06rem;overflow-wrap:anywhere}.selected-student small{color:var(--muted);font-size:.78rem}.selected-student .student-number{background:var(--action-pale);color:var(--action)}.status-choice{min-width:0;margin:0;padding:0;border:0}.status-choice 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var(--line)}.submission-summary>div{display:grid;grid-template-columns:88px 1fr;gap:12px;border-bottom:1px solid var(--line);padding:12px 4px;text-align:left}.submission-summary dt{color:var(--muted);font-size:.82rem}.submission-summary dd{margin:0;font-weight:650;overflow-wrap:anywhere;white-space:pre-wrap}.submission-summary dd .student-number{margin-right:8px}.submission-time{margin:11px 0 0;color:var(--muted);font-size:.77rem}.submitted-panel__actions{max-width:240px;margin:24px auto 0}.submitted-panel__actions .button{width:100%}.error-panel{max-width:620px;padding:25px}.name-picker .modal__surface{height:min(82vh,690px)}.name-picker__tools{flex:0 0 auto;display:grid;gap:12px;border-bottom:1px solid var(--line);padding:15px 20px}.search-input{min-height:46px;display:flex;align-items:center;gap:8px;border:1px solid var(--line-strong);border-radius:var(--radius-control);padding:0 11px;background:var(--surface)}.search-input>svg{flex:0 0 auto;color:var(--muted)}.search-input 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button:hover{background:#f5f8f7}.student-picker-list button.is-selected{background:var(--action-pale)}.student-picker-list button.is-selected:hover{background:#dbeae7}.student-picker-list__selected-icon{flex:0 0 auto;margin-left:auto;color:var(--action)}.student-name{display:grid}.student-name strong{font-size:.98rem}.student-name small{color:var(--muted);font-size:.76rem}.auth-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:34px 18px}.auth-card{width:min(100%,420px);border:1px solid var(--line);border-radius:var(--radius-panel);padding:31px 30px 25px;background:var(--surface)}.auth-card__icon{width:46px;height:46px;display:grid;place-items:center;margin-bottom:18px;border-radius:10px;background:var(--action-pale);color:var(--action)}.auth-card h1{margin-bottom:10px;font-size:1.55rem}.auth-card__lead{margin-bottom:24px;color:var(--muted);font-size:.9rem}.auth-card form{display:grid;gap:18px}.auth-card .notice{margin:0}.back-link{min-height:44px;display:flex;align-items:center;justify-content:center;gap:7px;margin-top:17px;font-size:.82rem;font-weight:700;text-decoration:none}.auth-page__privacy{max-width:420px;margin:16px 0 0;color:var(--muted);font-size:.75rem;text-align:center}.admin-layout{min-height:100vh;display:grid;grid-template-columns:208px minmax(0,1fr)}.admin-sidebar{height:100vh;position:sticky;top:0;display:flex;flex-direction:column;border-right:1px solid var(--line);padding:20px 14px;background:#f1f3f0}.admin-brand{min-height:51px;display:flex;align-items:center;gap:9px;padding:6px 10px 16px;color:var(--ink);font-size:.97rem;font-weight:800;text-decoration:none}.admin-brand svg{color:var(--action)}.admin-sidebar nav{display:grid;gap:4px;margin-top:13px}.admin-sidebar nav a,.admin-logout{min-height:46px;display:flex;align-items:center;gap:10px;border:0;border-radius:9px;padding:9px 11px;background:transparent;color:var(--muted);font-size:.87rem;font-weight:700;text-decoration:none;cursor:pointer}.admin-sidebar nav a:hover,.admin-logout:hover{background:#e7ebe8;color:var(--ink)}.admin-sidebar nav a[aria-current=page]{background:var(--surface);color:var(--action)}.admin-logout{width:100%;margin-top:auto}.admin-main{min-width:0;padding:var(--space-6) clamp(var(--space-5),3vw,var(--space-8)) 56px}.admin-page-header{min-height:72px;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding-bottom:18px}.admin-page-header h1{margin-bottom:4px;font-size:1.75rem;line-height:1.3}.admin-page-header>div>p:last-child{margin-bottom:0;color:var(--muted);font-size:.83rem}.admin-page-header__actions{padding-top:18px}.admin-page-header--compact{min-height:64px;align-items:center;padding-bottom:12px}.admin-page-header--compact .eyebrow{margin-bottom:2px;font-size:.69rem}.admin-page-header--compact h1{margin-bottom:2px;font-size:1.125rem;line-height:1.4}.admin-page-header--compact>div>p:last-child{font-size:.75rem;line-height:1.5}.admin-page-header--compact .admin-page-header__actions{padding-top:0}.admin-bottom-nav{display:none}.date-toolbar{min-height:112px;display:flex;align-items:center;justify-content:space-between;gap:var(--space-5);border-bottom:1px solid var(--line);padding:20px 0}.date-toolbar__date{min-width:max-content}.date-toolbar__date .eyebrow{margin-bottom:2px}.date-toolbar__date h2{display:flex;align-items:center;gap:10px;margin:0;color:var(--ink);font-size:clamp(2.125rem,3vw,2.5rem);line-height:1.15;letter-spacing:-.025em}.selected-period-label{width:fit-content;margin:6px 0 0;border-radius:999px;padding:3px 9px;background:var(--action-pale);color:var(--action);font-size:.75rem;font-weight:750}.date-toolbar__actions{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:var(--space-4)}.date-toolbar__navigation,.date-toolbar__utilities{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-2)}.date-toolbar__actions .button{min-height:44px;padding:8px 12px;font-size:.875rem}.date-today-button{min-width:58px;color:var(--action)}.date-today-button--return{border-color:#9fc3bd;background:var(--surface)}.date-today-button--return:hover:not(:disabled){border-color:var(--action);background:var(--action-pale)}.date-today-button--current:disabled{border-color:transparent;background:var(--action-pale);color:var(--action);opacity:1}.date-refresh-button svg.is-spinning{animation:spin .7s linear infinite}.summary-filter{margin-top:var(--space-5)}.summary-filter__label{margin-bottom:var(--space-2);color:var(--muted);font-size:.875rem;font-weight:700;letter-spacing:.04em}.summary-bar{display:grid;grid-template-columns:repeat(4,minmax(116px,140px));justify-content:start;gap:var(--space-2)}.summary-bar button{min-height:52px;display:flex;align-items:baseline;justify-content:space-between;gap:var(--space-2);border:1px solid;border-radius:12px;padding:8px 13px;cursor:pointer}.summary-bar button:hover{filter:brightness(.98)}.summary-bar button.is-active{box-shadow:inset 0 0 0 2px currentColor}.summary-bar button span{color:inherit;font-size:.9375rem;font-weight:800}.summary-bar button strong{font-size:1.5rem;font-variant-numeric:tabular-nums;line-height:1}.summary-bar button.summary-bar__present{border-color:#bad3c4;background:#f1f8f4;color:var(--present)}.summary-bar button.summary-bar__absent{border-color:#d7a59e;background:var(--absent-pale);color:var(--absent)}.summary-bar 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