:root{color:#283024;background:#f8f4e9;font-family:Noto Sans SC,Microsoft YaHei,sans-serif;font-size:16px;font-synthesis:none;text-rendering:optimizeLegibility;--green: #56663f;--green-dark: #3e4b2d;--green-soft: #e6eadc;--cream: #f8f4e9;--paper: #fffdf7;--ink: #283024;--muted: #68705f;--line: #d9d7ca;--line-strong: #b8b9a9;--clay: #90634e;--clay-soft: #f3e3da;--ochre: #796426;--ochre-soft: #f5edcf;--gray-soft: #ecece7;--danger: #8a3f35;--danger-soft: #f8e6df;--focus: #896c2d;--shadow: 0 10px 30px rgb(52 59 42 / 9%);--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px}*{box-sizing:border-box}html{min-width:320px;background:var(--cream)}body{margin:0;min-width:320px;min-height:100vh}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}a{color:var(--green-dark);text-underline-offset:3px}img{display:block;max-width:100%}p{line-height:1.7;text-wrap:pretty}h1,h2,h3,p{margin-top:0}h1,h2,h3{text-wrap:balance}h1{margin-bottom:10px;font:700 clamp(2rem,4vw,3rem)/1.18 "Noto Serif SC",serif;letter-spacing:-.035em}h2{margin-bottom:8px;font:700 clamp(1.3rem,2vw,1.65rem)/1.3 "Noto Serif SC",serif}h3{font-size:1.1rem;line-height:1.45}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid color-mix(in srgb,var(--focus) 55%,transparent);outline-offset:3px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.app-shell{min-height:100vh;display:flex;flex-direction:column}.topbar{position:sticky;top:0;z-index:20;min-height:72px;padding:0 max(24px,calc((100vw - 1200px)/2));display:flex;align-items:center;gap:32px;border-bottom:1px solid var(--line);background:#f8f4e9f5}.brand{min-height:52px;display:inline-flex;align-items:center;gap:11px;color:var(--ink);text-decoration:none}.brand>span:last-child{display:grid}.brand strong{font-family:"Noto Serif SC",serif;font-size:1rem}.brand small{color:var(--muted);font-size:.78rem}.brand-mark{width:38px;height:38px;display:inline-grid;place-items:center;flex:0 0 auto;border:1px solid var(--green);border-radius:50%;color:var(--paper);background:var(--green);font-family:"Noto Serif SC",serif;font-size:1.25rem;line-height:1}.brand-mark-large{width:48px;height:48px;margin-bottom:22px;font-size:1.5rem}.main-nav{align-self:stretch;display:flex;align-items:stretch;gap:8px}.main-nav a{min-height:52px;padding:0 14px;display:inline-flex;align-items:center;border-bottom:3px solid transparent;color:var(--muted);font-weight:600;text-decoration:none}.main-nav a:hover{color:var(--ink)}.main-nav a.active{border-bottom-color:var(--green);color:var(--green-dark)}.text-button{min-width:88px;min-height:44px;margin-left:auto;border:0;color:var(--muted);background:transparent;cursor:pointer}.text-button:hover{color:var(--green-dark);text-decoration:underline;text-underline-offset:4px}.main-content{width:min(1200px,calc(100% - 48px));margin:0 auto;padding:clamp(38px,7vw,72px) 0 80px;flex:1}.site-footer{padding:20px 24px 28px;color:var(--muted);text-align:center;font-size:.875rem}.page-stack{display:grid;gap:30px}.narrow-page{width:min(720px,100%);margin-inline:auto}.page-header>p,.participant-header p{max-width:720px;margin-bottom:0;color:var(--muted)}.split-header{display:flex;align-items:flex-end;justify-content:space-between;gap:32px}.header-actions,.form-actions,.task-actions{display:flex;gap:10px;flex-wrap:wrap}.eyebrow{display:block;margin-bottom:10px;color:var(--green-dark);font-size:.76rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase}.muted{color:var(--muted)}.button{min-height:46px;padding:10px 18px;display:inline-flex;align-items:center;justify-content:center;border:1px solid transparent;border-radius:var(--radius-sm);font-weight:700;line-height:1.25;text-decoration:none;cursor:pointer;transition:background-color .16s ease,border-color .16s ease,color .16s ease,transform .16s ease}.button:hover:not(:disabled){transform:translateY(-1px)}.button:active:not(:disabled){transform:translateY(0)}.button:disabled{opacity:.58;cursor:wait}.button-primary{border-color:var(--green);color:#fff;background:var(--green)}.button-primary:hover:not(:disabled){background:var(--green-dark)}.button-secondary{border-color:var(--line-strong);color:var(--green-dark);background:var(--paper)}.button-secondary:hover:not(:disabled){border-color:var(--green);background:var(--green-soft)}.button-quiet{border-color:transparent;color:var(--green-dark);background:transparent}.button-quiet:hover:not(:disabled){background:var(--green-soft)}.button-small{min-height:44px;padding:8px 13px;font-size:.9rem}.button-full{width:100%}.alert{padding:14px 16px;border:1px solid;border-radius:var(--radius-sm);line-height:1.55}.alert-error{border-color:#d5a89c;color:#71332b;background:var(--danger-soft)}.alert-success{border-color:#aeb99c;color:var(--green-dark);background:var(--green-soft)}.alert-neutral{border-color:var(--line);color:var(--ink);background:var(--cream)}.activation-notice{display:grid;gap:10px}.activation-notice small{display:block;margin-top:5px;color:var(--muted)}.activation-code{margin-inline:6px;font-size:1.15rem;letter-spacing:.08em;-webkit-user-select:all;user-select:all}.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);border-block:1px solid var(--line-strong);background:transparent}.stat-strip>div{min-height:94px;padding:18px 24px;display:flex;flex-direction:column;justify-content:center;border-right:1px solid var(--line)}.stat-strip>div:last-child{border-right:0}.stat-strip span{color:var(--muted);font-size:.9rem}.stat-strip strong{margin-top:3px;font:700 2rem/1.1 "Noto Serif SC",serif}.data-section,.timeline-section,.message-section,.form-panel,.answer-document{border:1px solid var(--line);border-radius:var(--radius-md);background:var(--paper)}.data-section{overflow:hidden}.section-toolbar{padding:24px 26px;display:flex;align-items:flex-end;justify-content:space-between;gap:28px;border-bottom:1px solid var(--line)}.section-toolbar p,.section-heading p{margin-bottom:0}.search-field{width:min(320px,100%)}label{display:grid;gap:8px;color:var(--ink);font-weight:600}label small{color:var(--muted);font-size:.875rem;font-weight:400;line-height:1.6}input,textarea,select{width:100%;min-height:48px;border:1px solid var(--line-strong);border-radius:var(--radius-sm);color:var(--ink);background:#fffefa}input,select{padding:10px 12px}textarea{padding:12px;resize:vertical;line-height:1.65}input::placeholder,textarea::placeholder{color:#929486}input:hover,textarea:hover,select:hover{border-color:var(--green)}.responsive-table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}th{padding:13px 18px;color:var(--muted);background:#f4f1e8;font-size:.82rem;letter-spacing:.04em;text-align:left}td{padding:18px;border-top:1px solid var(--line);vertical-align:middle}tbody tr:hover{background:#fbf8f0}.table-action{text-align:right;white-space:nowrap}.table-action a{min-height:44px;display:inline-flex;align-items:center;font-weight:700}.progress-cell{min-width:112px;display:grid;grid-template-columns:auto 70px;align-items:center;gap:10px}progress{width:70px;height:7px;border:0;border-radius:0;overflow:hidden;accent-color:var(--green);background:var(--line)}progress::-webkit-progress-bar{background:var(--line)}progress::-webkit-progress-value{background:var(--green)}progress::-moz-progress-bar{background:var(--green)}.status-badge{width:fit-content;min-height:28px;padding:3px 8px;display:inline-flex;align-items:center;gap:6px;border:1px solid;border-radius:999px;font-size:.82rem;font-weight:700;white-space:nowrap}.status-active,.status-completed,.status-submitted,.status-late-submitted{border-color:#acb89b;color:var(--green-dark);background:var(--green-soft)}.status-paused,.status-draft,.status-reopened{border-color:#d4c17c;color:var(--ochre);background:var(--ochre-soft)}.status-closed{border-color:#cba89a;color:var(--clay);background:var(--clay-soft)}.status-upcoming,.status-open{border-color:#c9c9c0;color:#5e625a;background:var(--gray-soft)}.feedback-state{min-height:230px;padding:44px 24px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.feedback-state p{max-width:560px;margin:8px 0 18px;color:var(--muted)}.loading-mark{width:24px;height:24px;border:2px solid var(--line-strong);border-top-color:var(--green);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.breadcrumb{min-height:44px;display:flex;align-items:center;gap:10px;color:var(--muted);font-size:.9rem}.breadcrumb a{min-height:44px;display:inline-flex;align-items:center}.form-panel{padding:clamp(24px,5vw,40px);display:grid;gap:26px;box-shadow:var(--shadow)}.form-panel label{gap:10px}.schedule-note{padding:18px;border-block:1px solid var(--line)}.schedule-note p{margin:5px 0 0;color:var(--muted)}.form-actions{justify-content:flex-end;padding-top:4px}.participant-header{padding:clamp(24px,4vw,38px);display:flex;align-items:flex-start;justify-content:space-between;gap:36px;border-block:1px solid var(--line-strong)}.participant-facts{min-width:52%;margin:0;display:grid;grid-template-columns:repeat(3,1fr)}.participant-facts div{padding:4px 20px;border-left:1px solid var(--line)}.participant-facts dt,.task-meta dt{margin-bottom:7px;color:var(--muted);font-size:.8rem}.participant-facts dd,.task-meta dd{margin:0;font-weight:600}.timeline-section,.message-section{padding:clamp(22px,4vw,34px)}.message-thread{display:grid;gap:12px;margin-bottom:22px}.message-bubble{width:min(78%,680px);padding:13px 16px;border:1px solid var(--line);border-radius:var(--radius-md)}.message-bubble p{margin:6px 0 0;white-space:pre-wrap;overflow-wrap:anywhere}.message-from-researcher{justify-self:end;border-color:#acb89b;background:var(--green-soft)}.message-from-participant{justify-self:start;background:var(--cream)}.message-meta{color:var(--muted);font-size:.8rem}.message-form{display:flex;align-items:flex-end;gap:12px}.message-form label{flex:1}.message-form textarea{min-height:92px}.section-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:28px}.timeline-legend{display:flex;gap:18px;color:var(--muted);font-size:.85rem}.timeline-legend b{color:var(--green)}.task-timeline{margin:0;padding:0;list-style:none}.timeline-item{position:relative;padding-left:50px}.timeline-item:not(:last-child):before{content:"";position:absolute;left:17px;top:38px;bottom:-1px;width:1px;background:var(--line-strong)}.timeline-marker{position:absolute;left:0;top:16px;width:35px;height:35px;display:grid;place-items:center;z-index:1;border:1px solid var(--line-strong);border-radius:50%;color:var(--muted);background:var(--paper);font-size:.82rem;font-weight:700}.timeline-status-submitted .timeline-marker,.timeline-status-late-submitted .timeline-marker{border-color:var(--green);color:#fff;background:var(--green)}.timeline-status-reopened .timeline-marker,.timeline-status-draft .timeline-marker{border-color:#a58b36;color:var(--ochre);background:var(--ochre-soft)}.task-row{min-height:130px;padding:18px 0 22px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.timeline-item:last-child .task-row{border-bottom:0}.task-main{min-width:0;flex:1}.task-title-line{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.task-title-line h3{margin:0}.week-label{color:var(--green-dark);font-size:.78rem;font-weight:700;letter-spacing:.08em}.task-meta{margin:15px 0 0;display:flex;gap:0;flex-wrap:wrap}.task-meta div{min-width:130px;padding-right:22px;margin-right:22px;border-right:1px solid var(--line)}.task-meta div:last-child{border-right:0}.task-meta dt{margin-bottom:3px}.task-meta dd{font-size:.9rem}.task-actions{max-width:260px;justify-content:flex-end}.no-submission{min-height:44px;display:inline-flex;align-items:center;color:var(--muted);font-size:.9rem}.dialog{width:min(560px,calc(100% - 32px));max-height:calc(100vh - 32px);padding:0;border:1px solid var(--line-strong);border-radius:var(--radius-md);color:var(--ink);background:var(--paper);box-shadow:0 22px 70px #252a1f38}.dialog::backdrop{background:#23281e7a}.dialog-form{padding:clamp(24px,5vw,36px);display:grid;gap:22px;overflow-y:auto}.dialog-form h2{margin-bottom:5px}.dialog-form p{margin-bottom:0}.inline-details{display:flex;align-items:center;gap:14px;flex-wrap:wrap;color:var(--muted)}.revision-select{width:min(280px,100%)}.submission-meta{padding:14px 18px;display:flex;justify-content:space-between;gap:20px;border-block:1px solid var(--line);color:var(--muted);font-size:.9rem}.answer-document{overflow:hidden}.answer-section{padding:clamp(24px,4vw,38px)}.answer-section+.answer-section{border-top:1px solid var(--line)}.answer-section>p{margin-bottom:22px}.answer-section dl{margin:0}.answer-field{display:grid;grid-template-columns:minmax(190px,30%) 1fr;gap:30px;padding:20px 0;border-top:1px solid var(--line)}.answer-field dt{color:var(--muted);font-weight:600;line-height:1.6}.answer-field dd{margin:0;line-height:1.8;white-space:pre-wrap;overflow-wrap:anywhere}.login-page{min-height:100vh;padding:32px;display:grid;place-items:center;background:var(--cream)}.login-panel{width:min(1040px,100%);min-height:650px;display:grid;grid-template-columns:1.1fr .9fr;overflow:hidden;border:1px solid var(--line-strong);border-radius:var(--radius-md);background:var(--paper);box-shadow:var(--shadow)}.login-copy{position:relative;padding:clamp(40px,7vw,74px);display:flex;flex-direction:column;align-items:flex-start;overflow:hidden;color:#fdfcf7;background:var(--green)}.login-copy .eyebrow{color:#e8ecd9}.login-copy h1{max-width:460px;font-size:clamp(2.4rem,5vw,4.2rem)}.login-copy p{max-width:470px;color:#eff2e8}.login-copy img{width:230px;max-height:230px;margin:auto 0 -30px auto;object-fit:contain;filter:drop-shadow(0 10px 20px rgb(27 32 20 / 16%))}.login-form{padding:clamp(36px,7vw,70px);display:flex;flex-direction:column;justify-content:center;gap:24px}.login-form h2{margin-bottom:7px}.login-form p{margin-bottom:0}@media(max-width:900px){.topbar{padding-inline:24px;gap:16px}.brand small{display:none}.participant-header{display:grid}.participant-facts{width:100%;min-width:0}.task-row{align-items:flex-start;flex-direction:column}.task-actions{max-width:none;justify-content:flex-start}.login-panel{grid-template-columns:.9fr 1.1fr}.login-copy{padding:44px 34px}}@media(max-width:720px){.topbar{position:static;padding:12px 16px 0;min-height:auto;flex-wrap:wrap}.brand{flex:1}.text-button{order:2;margin-left:0}.main-nav{order:3;width:100%;height:50px}.main-nav a{flex:1;justify-content:center;padding-inline:8px}.main-content{width:min(100% - 32px,1200px);padding:36px 0 60px}.split-header,.section-toolbar,.section-heading{align-items:stretch;flex-direction:column}.header-actions .button{flex:1}.stat-strip{grid-template-columns:repeat(2,1fr)}.stat-strip>div{min-height:82px;padding:14px 18px}.stat-strip>div:nth-child(2){border-right:0}.stat-strip>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.section-toolbar{padding:21px 18px}.search-field{width:100%}table,thead,tbody,tr,th,td{display:block}thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}tbody tr{padding:16px 18px;border-top:1px solid var(--line)}td{min-height:40px;padding:7px 0;display:grid;grid-template-columns:125px 1fr;gap:12px;border:0}td:before{content:attr(data-label);color:var(--muted);font-size:.82rem}.table-action{display:block;text-align:left}.table-action a{margin-top:8px}.participant-header{padding-inline:0}.participant-facts{grid-template-columns:1fr}.participant-facts div{padding:13px 0;border-left:0;border-top:1px solid var(--line)}.timeline-section,.message-section{padding-inline:17px}.message-bubble{width:92%}.message-form{align-items:stretch;flex-direction:column}.message-form .button{width:100%}.timeline-legend{display:none}.timeline-item{padding-left:42px}.timeline-item:not(:last-child):before{left:14px}.timeline-marker{width:29px;height:29px;left:0;top:20px}.task-meta{display:grid;grid-template-columns:1fr 1fr;gap:14px}.task-meta div{min-width:0;margin:0;padding:0;border:0}.task-actions{width:100%}.task-actions .button{flex:1}.submission-meta{flex-direction:column;gap:5px}.answer-field{grid-template-columns:1fr;gap:7px}.login-page{padding:0}.login-panel{min-height:100vh;grid-template-columns:1fr;border:0;border-radius:0}.login-copy{min-height:280px;padding:38px 26px 24px}.login-copy h1{font-size:2.4rem}.login-copy p{margin-bottom:0}.login-copy img{position:absolute;right:12px;bottom:-22px;width:130px;margin:0;opacity:.8}.login-form{padding:38px 26px 50px}}@media(max-width:420px){.brand-mark{width:34px;height:34px}.brand strong{font-size:.92rem}.text-button{min-width:74px}.header-actions,.form-actions{flex-direction:column-reverse}.header-actions .button,.form-actions .button{width:100%}td{grid-template-columns:108px 1fr}.progress-cell{min-width:0}.task-meta{grid-template-columns:1fr}.task-actions{flex-direction:column}.login-copy h1{max-width:270px}.login-copy p{padding-right:70px;font-size:.95rem}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}