:root{--ink:#1d1d27;--muted:#777985;--line:#e4e4ed;--panel:#fff;--background:#faf8fd;--purple:#4e40e7;--purple-light:#f0efff;--green:#16895e;--green-light:#e5fff4;--danger:#e02424}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--ink);font-size:14px}body{background:var(--background);display:flex;flex-direction:column}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer}h1{font-size:28px;line-height:1.2;letter-spacing:-.035em;margin:25px 0 26px}h2{font-size:22px;line-height:1.25;letter-spacing:-.025em;margin:0 0 14px}h3{font-size:17px;margin:0 0 14px;line-height:1.35}h4{font-size:13px;margin:0 0 12px}p{line-height:1.6}small{font-size:11px;color:var(--muted)}.muted{color:var(--muted)}.topbar{height:62px;background:#fff;border-bottom:1px solid var(--line)}.topbar-inner{max-width:1280px;padding:0 24px;height:100%;margin:auto;display:flex;align-items:center;gap:34px}.brand{font-weight:750;font-size:17px;letter-spacing:-.035em;white-space:nowrap}.topnav{display:flex;align-items:stretch;gap:28px;height:100%}.topnav>a{display:flex;align-items:center;position:relative;color:#303039;font-size:13px}.topnav>a.selected:after{content:"";position:absolute;bottom:0;left:0;right:0;border-bottom:2px solid var(--purple)}.top-right{margin-left:auto;display:flex;align-items:center;gap:14px}.user-chip{font-size:12px}.quiet{border:0;background:transparent;color:var(--purple)}.page{width:min(1280px,100%);margin:0 auto;padding:20px 24px 55px;flex:1}.footer{margin-top:auto;border-top:1px solid var(--line);padding:18px 24px;background:white;color:var(--muted);font-size:11px}.btn{border:1px solid transparent;border-radius:9px;padding:11px 18px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:12px;white-space:nowrap;min-height:37px}.btn-primary{background:var(--purple);color:#fff}.btn-primary:hover{background:#392cc4}.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}.btn-danger{background:var(--danger);color:white}.btn-small{padding:7px 12px;min-height:30px}.full{width:100%}.inline{display:inline}.tabs{border-bottom:1px solid var(--line);display:flex;gap:8px;margin-bottom:29px;padding-bottom:10px;overflow:auto}.tabs a{padding:7px 14px;font-size:12px;white-space:nowrap}.tabs a.active{background:#eeedf6;border-radius:9px;font-weight:600}.panel{background:var(--panel);border:1px solid var(--line);border-radius:13px;box-shadow:0 1px 2px rgba(35,35,60,.015)}.padded{padding:22px}.cards-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.competition-card{min-height:188px;border-radius:15px;border:1px solid var(--line);background:#fff;padding:23px;display:flex;flex-direction:column}.competition-card:hover{border-color:#b5affd;box-shadow:0 8px 26px #3530900c}.competition-card h3{font-size:16px;letter-spacing:-.02em;margin:17px 0 auto}.card-top,.card-bottom,.chips,.title-row,.form-actions{display:flex;align-items:center;justify-content:space-between;gap:15px}.card-top{align-items:flex-start}.card-bottom{border-top:1px solid var(--line);margin-top:20px;padding-top:16px;color:var(--muted);font-size:11px}.status-text{font-size:11px;white-space:nowrap}.badge{background:#f1f1f7;color:#454453;border-radius:6px;display:inline-block;padding:5px 9px;font-size:10px;line-height:1.25}.badge.purple{background:#eeefff;color:#544ae0}.badge.green{background:var(--green-light);color:var(--green)}.badge.right{float:right}.empty{padding:40px;color:var(--muted)}.detail-page{max-width:940px}.detail-panel{padding:32px}.detail-panel h1{font-size:27px;margin:12px 0 22px}.chips{justify-content:flex-start;gap:6px}.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0;margin-bottom:24px}.facts div,.detail-actions div{display:flex;flex-direction:column;gap:7px}.facts strong,.detail-actions strong{font-size:12px;font-weight:600}.description{font-size:13px;line-height:1.65;white-space:normal}.description p{margin:0 0 12px}.detail-tasks{border-top:1px solid var(--line);padding-top:18px;margin-top:20px}.task-list{display:grid;gap:8px}.task-list a{border:1px solid var(--line);border-radius:7px;padding:12px;display:flex;justify-content:space-between}.task-list span{color:var(--purple)}.detail-actions{border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;margin-top:30px;padding-top:17px}.auth-page{flex:1;display:flex;align-items:center;justify-content:center;padding:45px 20px;min-height:calc(100vh - 120px)}.auth-panel{width:min(450px,100%);padding:30px 28px}.auth-panel h1{text-align:center;font-size:21px;margin:0 0 10px}.auth-panel>.muted{text-align:center;font-size:12px}.switch{display:flex;background:#f5f4fb;border-radius:9px;padding:4px;margin:20px 0}.switch a{flex:1;text-align:center;padding:9px;border-radius:7px}.switch a.active{background:#fff;box-shadow:0 1px 3px #2222}.form-stack{display:grid;gap:14px}.field{display:grid;gap:6px;margin-bottom:15px}.field label{font-size:12px;font-weight:600}.field input,.field select,.field textarea,input:not([type=checkbox]),select,textarea{width:100%;border:1px solid #dcdce5;background:#fff;border-radius:9px;padding:10px 12px;color:var(--ink);outline:none}.field input:focus,.field select:focus,textarea:focus{border-color:#7367f0}.field textarea{min-height:120px}.field .error{color:#b91919}.check-field{display:flex;align-items:center;gap:10px}.check-field label{order:2;font-weight:400}.check-field input{order:1;width:auto}.narrow-page{max-width:940px}.breadcrumb{color:var(--muted);font-size:12px;margin:12px 0 12px}.breadcrumb a{color:var(--purple)}.form-panel{padding:30px}.form-actions{border-top:1px solid var(--line);padding-top:15px;justify-content:flex-end}.profile-grid{display:grid;grid-template-columns:2fr 1fr;gap:18px}.profile-grid h2{margin:10px 0 16px}.profile-facts{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:28px;font-size:12px;color:var(--muted)}.profile-facts div{display:grid;gap:7px}.profile-facts strong{color:var(--ink)}.stat-card{margin-bottom:16px}.stat-card h2{font-size:31px;margin:8px 0}.stat-card h2 small{font-size:12px}.stat-card p{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:12px}.stat-card a,.section-title a,.card-links a,.actions a{color:var(--purple)}.history-row{padding:20px 4px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;align-items:center}.history-row:last-child{border:0}.history-row h3{margin:10px 0 5px}.searchline{display:flex;gap:10px;margin:20px 0}.searchline input{max-width:350px}.table-scroll{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:12px;text-align:left}th{font-size:11px;color:#555665;font-weight:500;background:#fafafe;padding:14px 20px;white-space:nowrap;border-bottom:1px solid var(--line)}td{padding:17px 20px;border-bottom:1px solid #ececf2;vertical-align:middle}tr:last-child td{border-bottom:0}td strong{font-size:12px}.subline{display:block;margin-top:5px}.place{display:inline-grid;place-items:center;width:23px;height:23px;border-radius:50%;background:#f2f2f7}.place-1{background:#fceacc;color:#a36d00}.place-2{background:#e7eaf0;color:#647080}.place-3{background:#fae6d9;color:#a46033}.filterbar{display:flex;justify-content:space-between;gap:15px;padding:14px;margin:10px 0 22px}.filterbar input{max-width:285px}.segmented{display:flex;background:#f5f5f8;border-radius:8px;padding:3px}.segmented a{font-size:11px;padding:10px;border-radius:6px;white-space:nowrap}.segmented a.active{background:white;box-shadow:0 1px 3px #1112}.actions{min-width:140px}.actions a{display:block;font-size:11px;margin:4px}.empty-cell{text-align:center;padding:70px!important}.empty-cell p{color:var(--muted)}.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;border-top:1px solid var(--line);padding-top:18px;margin-top:20px}.summary-grid div{border:1px solid var(--line);border-radius:8px;padding:15px;display:grid;gap:8px}.summary-grid strong{font-size:16px}.section-title{margin:25px 0 15px}.section-title h3{margin:0}.section-title small{display:block;margin-top:4px}.card-links{display:flex;justify-content:flex-end;gap:15px;border-top:1px solid var(--line);padding-top:12px}.card-links button{background:transparent;border:0;font-size:12px}.link-danger{color:var(--danger)}.row-form{display:flex;align-items:center;gap:8px}.row-form input{max-width:100px}.row-form input[name=title]{max-width:280px}.spaced{margin-top:20px}.solution{white-space:pre-wrap;overflow:auto;background:#f8f8fb;padding:20px;border:1px solid var(--line);border-radius:9px;max-height:550px}.message{padding:11px 15px;border-radius:8px;margin:12px 0;background:#f0efff}.message.error{background:#ffebeb;color:#a11919}.message.success{background:#e7fff3;color:#07683e}.workspace-page{width:100%;flex:1;background:#f5f6f9}.workspace-header{padding:13px 18px;background:white;border-bottom:1px solid var(--line);display:flex;gap:12px;align-items:center;font-size:12px}.brand-icon{background:var(--purple);color:#fff;padding:7px;border-radius:5px}.workspace-layout{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:300px minmax(0,1fr);gap:14px;padding:20px}.workspace-sidebar{background:#f1f2f6}.sidebar-title{padding:15px;margin-bottom:5px}.sidebar-title small{float:right}.sidebar-task{display:flex;justify-content:space-between;align-items:start;gap:10px;font-size:12px;padding:14px 12px;border-left:3px solid transparent}.sidebar-task.selected{border-left-color:var(--purple);background:#e9e9ff}.sidebar-task span:last-child{white-space:nowrap}.task-detail{border-radius:4px}.task-heading{display:flex;justify-content:space-between;padding:20px;border-bottom:1px solid var(--line);align-items:start}.task-heading h2{margin:7px 0 0}.eyebrow{font-size:10px;color:var(--purple)}.timer{color:#ad6600;background:#fff9ee;border:1px solid #ead6a9;border-radius:5px;padding:12px;font-size:11px;white-space:nowrap}.success-line{border-bottom:1px solid var(--line);padding:12px 20px;color:var(--green);font-size:11px}.task-copy{padding:20px;min-height:370px}.task-copy h4{margin-top:14px}.format-grid,.sample-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:20px 0}.soft-box{background:#f8f8fb;border:1px solid var(--line);padding:15px;font-size:11px;line-height:1.5}.sample-grid{border:1px solid var(--line);gap:0}.sample-grid>div{min-width:0}.sample-grid>div+div{border-left:1px solid var(--line)}.sample-grid small{display:block;background:#f1f2f6;padding:8px 13px}.sample-grid pre{padding:12px;margin:0;white-space:pre-wrap}.submit-block{border-top:1px solid var(--line);padding:20px;background:#f8f9fb}.submit-block select{border-radius:5px 5px 0 0}.code-editor{border-radius:0!important;min-height:230px!important;font:12px/1.6 "SFMono-Regular",Consolas,monospace;resize:vertical}.submit-block .form-actions{justify-content:space-between}.workspace-page+.footer{font-size:10px}
@media(max-width:850px){.cards-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.workspace-layout{grid-template-columns:1fr}.workspace-sidebar{display:flex;overflow:auto}.sidebar-title{white-space:nowrap}.sidebar-task{min-width:180px}.filterbar{flex-wrap:wrap}.topbar-inner{gap:20px}.topnav{gap:15px}.user-chip{display:none}}@media(max-width:600px){.page{padding:16px}.topbar-inner{padding:0 14px;gap:12px}.topnav{gap:9px}.topnav>a{font-size:11px}.brand{font-size:14px}.cards-grid,.profile-grid,.summary-grid,.facts,.format-grid,.sample-grid{grid-template-columns:1fr}.detail-panel{padding:20px}.detail-actions{align-items:start;gap:10px}.competition-card{min-height:165px}.title-row{align-items:start}.title-row .btn{white-space:normal}.filterbar{padding:8px}.segmented{overflow:auto;width:100%}.top-right .quiet{display:none}.workspace-layout{padding:7px}.task-heading{flex-wrap:wrap}.row-form{flex-wrap:wrap}.footer{padding:12px}}
.guest-lock{text-align:center;min-height:390px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}.guest-lock h2{margin:4px 0}.guest-lock p{max-width:470px}.guest-lock .badge{font-size:20px;padding:12px}
.form-panel .field>div[id$="_0"]{display:flex;gap:12px}.form-panel .field>div:has(>label>input[type=radio]){display:flex;gap:10px}.form-panel .field>div>div>label{display:flex;align-items:center;gap:5px;padding:8px 10px;border-radius:7px;background:#f6f6fb;font-weight:400}.form-panel input[type=radio]{width:auto}.form-panel input[type=date],.form-panel input[type=time]{max-width:230px;margin-right:8px}
/* Links inside page headings retain the button foreground from the design. */
.btn.btn-primary,.section-title .btn.btn-primary,.title-row .btn.btn-primary{color:#fff}
.btn.btn-primary:hover,.btn.btn-primary:focus-visible{color:#fff}
.btn.btn-danger{color:#fff}
[hidden]{display:none!important}
.test-cases-section{border-top:1px solid var(--line);padding:24px 0;margin-top:15px}
.test-cases-section>p{font-size:12px;margin:0 0 20px}
.test-case{background:#fafafe;border:1px solid var(--line);border-radius:10px;padding:18px;margin:14px 0}
.test-case h4{margin:0}.test-fields{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.test-fields textarea{min-height:90px;font-family:Consolas,monospace;font-size:12px}
.test-weight{max-width:180px;margin:0}.hidden-delete{display:none}.test-weight-summary{display:block;margin:12px 0}
.error{color:#a71919}.submission-status{background:#f2f1ff;border:1px solid #ddd9ff;border-radius:8px;padding:12px 15px;margin:16px 0;font-size:12px}
.workspace-tools{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 20px;background:#fff;border-bottom:1px solid var(--line)}
@media(max-width:600px){.test-fields{grid-template-columns:1fr}.workspace-tools{flex-wrap:wrap}}