:root{font-family:Inter,"Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;color:#223143;background:#f3f5f8;font-size:15px;line-height:1.55;--primary:#205eaa;--border:#dce3ec;--muted:#69788b;--danger:#a62929;--success:#246848;--warning:#805a08}
*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{border:1px solid #cbd5e2;border-radius:7px;background:white;color:#253c58;padding:8px 14px;cursor:pointer;font-weight:600}button:hover:not(:disabled){background:#eef4fb;border-color:#7397c3}button:disabled{cursor:not-allowed;opacity:.58}button.primary{background:var(--primary);border-color:var(--primary);color:white}button.primary:hover:not(:disabled){background:#174c8c}button.quiet{background:transparent}a{color:var(--primary)}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #74b2fb;outline-offset:3px}[hidden]{display:none!important}h1,h2,h3,p{margin:0}h1{font-size:28px;line-height:1.3;letter-spacing:-.02em}h2{font-size:18px;line-height:1.5}h3{font-size:15px}p+p{margin-top:8px}.muted{color:var(--muted)}.small{font-size:13px}.eyebrow{text-transform:uppercase;font-size:12px;letter-spacing:.1em;color:var(--primary);font-weight:700;margin-bottom:7px}.site-header{height:80px;padding:0 max(24px,calc((100vw - 1320px)/2));border-bottom:1px solid var(--border);background:white;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none;font-size:18px;font-weight:750;line-height:1.2}.brand small{display:block;color:var(--muted);font-size:12px;font-weight:500;letter-spacing:.06em;margin-top:5px}.brand-mark{display:grid;place-items:center;width:39px;height:39px;background:#1e568f;border-radius:10px;color:white;font-size:22px}.account{display:flex;gap:16px;align-items:center;font-size:14px}.account span{max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}main{max-width:1320px;margin:auto;padding:32px 24px 92px}.panel{background:white;border:1px solid var(--border);border-radius:12px;box-shadow:0 2px 5px #1a355006}.boot{max-width:480px;margin:100px auto;text-align:center;padding:40px}.boot .spinner{display:inline-block;margin-bottom:12px}.boot button{margin-top:18px}.login-layout{display:grid;grid-template-columns:1.25fr 1fr;gap:64px;max-width:970px;align-items:center;min-height:65vh;margin:auto}.login-intro h1{font-size:42px;max-width:500px}.login-intro>p:not(.eyebrow){font-size:17px;max-width:430px;color:#65758a;margin-top:18px}.scope-note{font-size:13px;color:#586b81;line-height:1.85;border-left:3px solid #a7bdd6;padding-left:16px;margin-top:36px}.login-form{padding:30px}.login-form h2{margin-bottom:22px}form label{display:block;font-size:13px;font-weight:600;margin:17px 0 6px}input{width:100%;border:1px solid #c7d2df;border-radius:7px;padding:10px 11px;background:white;color:#24354a;min-width:0}input[type=file]{font-size:13px;padding:8px;overflow:hidden}input::file-selector-button{border:0;background:#eaf0f7;color:#284c76;border-radius:4px;padding:5px 9px;margin-right:8px}.login-form .primary,.upload-form .primary{width:100%;margin-top:20px;min-height:41px}.login-form>.muted{margin-top:16px}.inline-message{font-size:13px;line-height:1.6;margin-top:10px;min-height:0;overflow-wrap:anywhere}.inline-message:empty{display:none}.inline-message.error{color:var(--danger)}.inline-message.success{color:var(--success)}.inline-message.busy{color:var(--primary)}.workspace-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:22px}.workspace-heading .muted{font-size:14px;margin-top:7px}.notice{border:1px solid #d6e3f2;background:#edf4fc;border-radius:8px;padding:13px 17px;margin:16px 0 20px;font-size:14px;color:#345477;display:flex;gap:18px;flex-wrap:wrap}.notice strong{font-weight:700}.notice span{flex:1;min-width:240px}#owner-notice{margin:-8px 0 16px}.workspace-grid{display:grid;grid-template-columns:330px minmax(0,1fr);gap:22px;align-items:start}.project-sidebar{display:grid;gap:18px}.upload-form{padding:21px}.upload-form label:first-of-type{margin-top:14px}#upload-limit{margin-top:6px}.project-list-panel{overflow:hidden}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.project-list-panel>.section-heading{padding:17px 20px;border-bottom:1px solid var(--border)}.count{font-size:12px;background:#eff3f7;border-radius:20px;min-width:24px;padding:2px 8px;text-align:center;color:#52677f}.project-list{max-height:420px;overflow:auto;padding:8px}.project-choice{width:100%;text-align:left;border:1px solid transparent;display:block;padding:13px 12px;border-radius:6px;font-weight:400;margin-bottom:3px}.project-choice:hover:not(:disabled){border-color:#dce4ef}.project-choice[aria-current=true]{background:#edf4fd;border-color:#b9d0ec}.project-choice strong{display:block;font-size:14px;color:#243f62;overflow-wrap:anywhere}.project-choice small{display:flex;gap:8px;justify-content:space-between;align-items:center;margin-top:7px;color:var(--muted);font-size:11px}.project-choice .badge{font-size:11px;padding:2px 6px}.project-detail{min-height:560px;padding:28px}.empty-state{min-height:440px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--muted);gap:12px}.empty-state h2{color:#425975}.empty-state p{max-width:370px;font-size:14px}.empty-icon{font-size:58px;line-height:1;color:#bacbdf;font-weight:300}.empty{padding:21px 15px;color:var(--muted);font-size:13px}.detail-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:14px}.detail-heading h2{font-size:23px;overflow-wrap:anywhere}.detail-meta{font-size:12px;color:var(--muted);margin-top:8px;overflow-wrap:anywhere}.badge{display:inline-block;font-size:12px;font-weight:600;border-radius:5px;padding:4px 9px;background:#edf1f5;color:#5b6c80;white-space:nowrap}.badge.good{background:#e5f3eb;color:var(--success)}.badge.bad{background:#fff0ed;color:var(--danger)}.badge.wait{background:#fff4d9;color:var(--warning)}.badge.active{background:#e8f2ff;color:#255a98}.detail-section{border-top:1px solid #e5eaf0;padding-top:22px;margin-top:24px}.file-list,.job-list{list-style:none;padding:0;margin:12px 0 0}.file-row{display:flex;align-items:center;gap:16px;padding:12px 0;border-bottom:1px solid #edf0f5}.file-row:last-child{border-bottom:0}.file-info{flex:1;min-width:0}.file-info strong{font-size:14px;font-weight:500;display:block;overflow-wrap:anywhere}.file-info small{display:block;color:var(--muted);font-size:12px;margin-top:3px}.file-row a{font-size:13px;font-weight:600;white-space:nowrap}.job-actions{display:flex;align-items:center;gap:16px;margin:20px 0 8px}.job-actions .muted{font-size:13px;max-width:420px}.job-row{border:1px solid #e0e6ee;border-radius:8px;padding:15px 16px;margin-bottom:12px}.job-top{display:flex;justify-content:space-between;align-items:center;gap:10px}.job-top h3{font-size:14px}.job-description{color:#63758b;font-size:13px;margin-top:9px;overflow-wrap:anywhere}.job-footer{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:12px;font-size:12px;color:var(--muted)}.job-footer button{padding:4px 9px;font-size:12px;margin-left:auto}.job-id{font-family:ui-monospace,monospace;font-size:11px;color:#8591a1;overflow-wrap:anywhere;margin-top:8px}.timeline{display:flex;gap:0;margin:20px 0 8px;padding:0;list-style:none;font-size:12px;color:var(--muted)}.timeline li{flex:1;position:relative;padding-top:15px;border-top:2px solid #e2e8f0}.timeline li:before{content:"";display:block;width:9px;height:9px;background:#dce4ef;border:2px solid white;position:absolute;top:-6px;left:0;border-radius:50%;box-shadow:0 0 0 1px #dce4ef}.timeline li.complete{color:var(--success);border-color:#85b69c}.timeline li.complete:before{background:#3b8960;box-shadow:0 0 0 1px #3b8960}.timeline li.current{color:var(--primary);font-weight:700}.timeline li.current:before{background:var(--primary);box-shadow:0 0 0 1px var(--primary)}.status-bar{position:fixed;bottom:0;left:0;right:0;min-height:47px;background:#fff;border-top:1px solid var(--border);padding:11px 24px;display:flex;gap:20px;align-items:center;font-size:12px;z-index:5}.connection{display:flex;gap:6px;align-items:center;white-space:nowrap;color:#5d7087}.connection i{width:7px;height:7px;border-radius:50%;background:#9ba9bb}.connection.online i{background:#3d9567}.connection.offline i{background:#c47e26}#global-status{flex:1;overflow-wrap:anywhere;color:#53687f}#global-status.error{color:var(--danger)}.last-sync{white-space:nowrap;color:#7f8ea1}.spinner{width:19px;height:19px;border:2px solid #dce8f5;border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}.skip-link{position:absolute;left:16px;top:-60px;z-index:10;background:white;padding:8px}.skip-link:focus{top:10px}@keyframes spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.spinner{animation:none}}@media(max-width:900px){.workspace-grid{grid-template-columns:285px minmax(0,1fr);gap:16px}.project-detail{padding:20px}.login-layout{gap:35px}.login-intro h1{font-size:35px}}@media(max-width:680px){.site-header{height:70px;padding:0 18px}.brand{font-size:16px}.account{gap:8px}.account span{max-width:90px}main{padding:24px 16px 110px}.login-layout{display:flex;flex-direction:column;gap:26px;min-height:0;align-items:stretch}.login-intro h1{font-size:30px}.login-intro>p:not(.eyebrow){font-size:15px}.scope-note{margin-top:20px}.login-form{padding:24px}.workspace-grid{grid-template-columns:1fr}.project-sidebar{grid-template-columns:1fr}.project-list{max-height:260px}.project-detail{min-height:400px}.empty-state{min-height:320px}.workspace-heading{align-items:flex-start}h1{font-size:25px}.notice{gap:6px}.notice span{min-width:0;flex-basis:100%}.job-actions{align-items:flex-start;flex-direction:column;gap:9px}.status-bar{padding:9px 16px;gap:7px 14px;flex-wrap:wrap}.last-sync{display:none}#global-status{flex-basis:75%;font-size:12px}.detail-heading{flex-wrap:wrap}.timeline{font-size:11px}.file-row{gap:9px}}
.section-empty{margin-top:12px}.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}
.workspace-heading>button{white-space:nowrap;flex-shrink:0}
.qualification-notice{background:#fff5e5;border-color:#edd3a5;color:#875f21}.owner-admin{margin:0 0 22px}.owner-admin>summary{cursor:pointer;padding:15px 20px;font-weight:650}.owner-admin>summary .small{font-weight:400;margin-left:14px}.admin-body{padding:0 22px 22px}.admin-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:32px;margin-top:20px}.admin-create{padding-right:30px;border-right:1px solid var(--border)}.admin-fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}.password-row{display:flex;gap:8px}.password-row input{flex:1;min-width:0}.password-row button{flex-shrink:0;white-space:nowrap}.checkbox-row{display:flex;align-items:center;gap:8px;line-height:1.5}.checkbox-row input{width:17px;height:17px;flex:0 0 17px}.admin-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.admin-user-list{max-height:190px;overflow:auto;margin-top:13px;display:flex;flex-wrap:wrap;align-content:start;gap:7px}.admin-user-list button{font-size:12px;font-weight:500}.admin-user-list button[aria-current=true]{background:#edf4fd;border-color:#b9d0ec}.admin-user-list button small{color:var(--muted);margin-left:6px}#admin-grant-form{margin-top:20px;padding-top:16px;border-top:1px solid var(--border)}#admin-reset-form{margin-top:20px;padding-top:3px;border-top:1px solid var(--border)}.danger{color:#a62929;border-color:#e0bcbc}.secret-card{background:#edf6ef;border:1px solid #c9dece;border-radius:8px;padding:18px;margin-top:24px}.secret-card label{display:block;font-size:13px;margin:12px 0 5px}.secret-card textarea{font:14px/1.65 ui-monospace,monospace;display:block;width:100%;padding:10px;border:1px solid #b8ccb9;border-radius:5px;resize:vertical}.admin-create>.primary{margin-top:16px}#admin-selected-status,#admin-usage{margin-top:5px}@media(max-width:680px){.admin-grid{grid-template-columns:1fr;gap:24px}.admin-create{border-right:0;padding-right:0;border-bottom:1px solid var(--border);padding-bottom:24px}.owner-admin>summary .small{display:block;margin-left:0;margin-top:5px}.admin-body{padding:0 16px 18px}.password-row{flex-wrap:wrap}.password-row input{flex-basis:100%}}
.quota-summary{margin:0 0 18px;line-height:1.8}.quota-reason{color:#875f21}.technical-details{font-size:11px;color:#8290a0;margin-top:8px}.technical-details summary{cursor:pointer}.technical-details p{margin-top:5px}.technical-details[open]{max-width:100%;overflow-wrap:anywhere}

.inline-message.warning,#global-status.warning{color:var(--warning)}

.workspace-open-link{display:inline-block;padding:10px 16px;border-radius:7px;text-decoration:none;font-weight:600}.workspace-open-link:hover{background:#174c8c}

.practice-entry{padding:12px;border:1px solid var(--line,#dce7eb);border-radius:10px;background:#f4f9fa;margin:10px 0 16px}.practice-entry button{width:100%;font-weight:650}.practice-entry p{margin:8px 0 0;line-height:1.55}

.public-intro{padding:28px;margin-bottom:20px}.public-intro>p{max-width:850px;margin-top:12px}.public-actions{display:flex;align-items:center;gap:20px;margin:20px 0}.public-five{display:flex;flex-wrap:wrap;gap:12px 28px;padding-left:22px;font-size:14px}.public-intro video{display:block;width:100%;max-width:720px;max-height:65vh;margin-top:12px;background:#17272d}.public-intro summary{cursor:pointer;margin-top:18px}.public-resume{padding:20px;margin-bottom:20px}.public-resume button{margin:8px 8px 8px 0}.public-resume p{margin:8px 0}#boot-panel{max-width:none;text-align:left;margin:12px 0;padding:12px 18px;font-size:13px}#boot-panel .spinner{margin:0 10px 0 0;width:14px;height:14px}#boot-panel button{margin-top:8px}.login-layout{min-height:0;margin:24px auto}.login-intro h1{font-size:28px}@media(max-width:680px){.public-intro{padding:18px}.public-actions{align-items:stretch;flex-direction:column;gap:12px}.public-five{display:block}.public-five li{margin:7px 0}.public-resume button{width:100%}}

/* Owner diagnostics panel: presentation only, shared API contracts unchanged. */
.admin-history>summary{line-height:1.55}.history-body{padding:0 22px 22px}.history-notice{font-size:13px;color:var(--muted);margin:0 0 18px;max-width:960px}.history-columns{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:18px}.history-card{min-width:0;border:1px solid var(--border);border-radius:9px;padding:18px;background:#f8fafc}.history-card h3{margin-bottom:16px;font-size:16px}.history-field{display:grid;gap:6px;min-width:0;font-size:13px;font-weight:600;color:#465a72}.history-field input,.history-field select{display:block;width:100%;max-width:100%;min-width:0;font:inherit;font-weight:400;color:#24354a;background:white;border:1px solid #c7d2df;border-radius:7px;padding:10px 11px;min-height:42px}.history-field select:focus-visible{outline:3px solid #74b2fb;outline-offset:3px}.history-account-row,.history-renew-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:end}.history-account-row button,.history-renew-row button{min-height:42px;white-space:nowrap}.history-account-summary{margin:16px 0;font-size:13px;color:#52677f;overflow-wrap:anywhere}.history-account-summary dl{margin:0;display:grid;gap:9px}.history-account-summary dl>div{display:grid;grid-template-columns:78px minmax(0,1fr);gap:10px}.history-account-summary dt{color:var(--muted)}.history-account-summary dd{margin:0;color:#304760;min-width:0}.history-dates{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:12px}.history-actions{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 12px}.history-actions button{min-height:42px;max-width:100%}.history-results{margin-top:22px;padding-top:20px;border-top:1px solid var(--border)}.history-result-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}.history-status{margin-top:12px;padding:12px 14px;background:#f0f5fb;border-radius:7px;color:#47627e;font-size:13px;overflow-wrap:anywhere}.history-status:empty{display:none}.history-events{padding:0;margin:14px 0 0;list-style:none;max-height:430px;overflow:auto;overscroll-behavior:contain}.history-events:empty{display:none}.history-events li{padding:13px 2px;border-bottom:1px solid #e6ebf1}.history-events li:last-child{border-bottom:0}.history-event-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.history-event-heading strong{font-size:14px}.history-event-outcome{flex-shrink:0;padding:2px 7px;border-radius:5px;background:#eaf0f6;color:#536d88;font-size:12px}.history-event-outcome[data-outcome=error]{color:var(--danger);background:#fff0ed}.history-event-outcome[data-outcome=ok]{color:var(--success);background:#e5f3eb}.history-event-meta,.history-event-error{margin-top:6px!important;font-size:12px;color:var(--muted);overflow-wrap:anywhere}.history-event-error{color:var(--danger)}
@media(max-width:960px){.history-columns{grid-template-columns:minmax(0,1fr)}.history-card{padding:16px}}
@media(max-width:480px){.history-body{padding:0 14px 16px}.admin-history>summary{padding:14px}.history-columns{gap:14px}.history-card{padding:14px}.history-dates{grid-template-columns:minmax(0,1fr)}.history-account-row,.history-renew-row{grid-template-columns:minmax(0,1fr)}.history-account-summary dl>div{grid-template-columns:68px minmax(0,1fr);gap:8px}.history-actions{display:grid;grid-template-columns:minmax(0,1fr)}.history-actions button{width:100%}.history-event-heading{align-items:flex-start}.history-result-heading button{white-space:nowrap}.history-events{max-height:360px}}

/* Home entry: account controls precede public cases; no private action is automatic. */
.public-auth-actions{display:flex;align-items:center;gap:10px;margin-left:auto}.public-auth-actions a,.public-auth-actions button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:9px 18px;border-radius:8px;text-decoration:none;font-weight:650}.public-auth-actions a{border:1px solid #ccd6e3;background:#fff}.public-intro h1{font-size:28px}.home-upload{display:flex;align-items:center;justify-content:space-between;gap:18px;background:#edf4fc;border:1px solid #bbcee7;border-radius:12px;padding:20px;margin-top:20px}.home-upload button{min-height:46px;flex-shrink:0}.public-intro .challenge-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:18px 0}.public-intro .challenge-card{padding:16px;gap:7px}.public-intro .challenge-card h2{font-size:18px}.challenge-actions{display:flex;flex-direction:column;gap:8px;margin-top:auto;padding-top:10px}.challenge-actions a{display:flex;align-items:center;justify-content:center;min-height:44px;text-decoration:none;border:1px solid #b7cce6;border-radius:7px;padding:8px;font-size:14px;font-weight:600;background:#fff}.challenge-actions a:first-child{color:#fff;background:#205eaa;border-color:#205eaa}.login-layout .login-intro{display:none}.login-layout{display:block;max-width:580px;margin:0 0 18px}.login-layout .login-form{max-width:none}.login-password-row{display:flex;gap:8px}.login-password-row input{flex:1;min-width:0}.login-password-row button{flex-shrink:0;min-width:58px}.field-error{display:block;color:#a62929;font-size:13px;font-weight:500;margin-top:4px}.field-error:empty{display:none}input[aria-invalid=true]{border-color:#b62e2e;background:#fff7f5}#trial-register-status:not(:empty){padding:10px;border-radius:6px;background:#f0f4fa}#trial-register-form label{display:block;margin:12px 0}#trial-register-form input{width:100%;font-size:16px}#trial-register-submit,#trial-register-cancel{min-height:44px;margin:8px 6px 0 0}
@media(max-width:900px){.public-intro .challenge-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:560px){.site-header{padding:12px 14px;height:auto;min-height:72px;gap:8px}.brand{gap:7px;font-size:16px}.brand-mark{width:32px;height:32px}.public-auth-actions{gap:6px}.public-auth-actions a,.public-auth-actions button{padding:8px 12px}.public-intro{padding:14px}.public-intro h1{font-size:24px}.home-upload{padding:14px;gap:10px;align-items:flex-start}.home-upload h2{font-size:17px}.home-upload button{padding:9px 12px}.public-intro .challenge-grid{gap:8px}.public-intro .challenge-card{padding:12px;gap:6px}.public-intro .challenge-card h2{font-size:16px}.public-intro .challenge-card p{font-size:12px}.public-intro .challenge-card>span:not(.challenge-level){font-size:12px}.challenge-level{font-size:11px}.challenge-level strong{margin-left:3px;padding:2px 3px}.challenge-actions a{font-size:12px;padding:7px 3px}.login-layout input{font-size:16px}.account{gap:8px}.account span{max-width:90px}}

/* Same local-only visibility control in login and both registration fields. */
.login-password-row .password-visibility{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:9px;flex:0 0 44px}.password-visibility svg{pointer-events:none}.registration-field{margin:12px 0}.registration-field>label{margin-bottom:6px!important}.registration-field .login-password-row input{width:0!important;flex:1}

/* Owner-only invitation controls; account panel stays usable on small screens. */
#admin-invitations {padding:16px;border:1px solid var(--line, #d8e0e8);border-radius:12px;margin-bottom:20px;min-width:0}
#admin-invitations .actions {display:flex;flex-wrap:wrap;align-items:center;gap:10px}
#admin-invitations select,#admin-invitations button {min-height:44px}
#admin-invitations textarea {box-sizing:border-box;font:13px/1.6 monospace;resize:vertical}
#admin-invitations .admin-invitation-row {border-bottom:1px solid var(--line, #d8e0e8);padding:8px 0;overflow-wrap:anywhere}
#admin-invitations .admin-invitation-row p {margin:4px 0}
#admin-invitations details {margin-top:14px}
#admin-invitations summary {cursor:pointer;min-height:44px;align-content:center}

/* The owner entry opens the existing management panel, including its loading/retry state. */
.account .admin-entry{min-height:44px;background:#e8f1fc;border-color:#8cacd2;color:#164e90;white-space:nowrap}
#owner-admin,#admin-loader{scroll-margin-top:20px}
@media(max-width:560px){.site-header{flex-wrap:wrap}.site-header .account{margin-left:auto;flex-wrap:wrap;justify-content:flex-end}.account button{min-height:44px;padding:8px 10px}}

/* Account library: source previews and bounded facts, with direct project actions. */
.signed-in-home .public-intro .library-intro,.signed-in-home .public-intro .home-upload{display:none}
.signed-in-home #workspace{margin-bottom:24px}.signed-in-home .public-intro{margin-top:20px}
.library-intro p{margin-top:10px;color:var(--muted)}.library-toolbar{display:flex;gap:8px;flex-wrap:wrap}
.library-toolbar button{min-height:44px}.workspace-grid{display:flex;flex-direction:column;gap:20px}.project-sidebar{width:100%;display:flex;flex-direction:column;gap:16px}.project-detail{width:100%;min-height:0;scroll-margin-top:20px}.project-detail .empty-state{min-height:120px}.upload-panel>summary{padding:14px 20px;min-height:48px;cursor:pointer;font-weight:650}.upload-panel .upload-form{max-width:720px;padding-top:0}.project-list{max-height:none;overflow:visible;padding:18px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.project-list>.empty{grid-column:1/-1}.workpiece-card{min-width:0;border:1px solid var(--border);border-radius:11px;overflow:hidden;display:flex;flex-direction:column;background:#fff}.workpiece-card[data-selected=true]{border-color:#6091cd;box-shadow:0 0 0 1px #6091cd}.workpiece-preview{position:relative;display:flex;align-items:center;justify-content:center;aspect-ratio:320/204;background:linear-gradient(155deg,#f0f5f8,#e3ebf2);text-decoration:none;overflow:hidden;color:#62758a}.workpiece-preview img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}.thumbnail-placeholder{font-size:13px;text-align:center;padding:16px}.thumbnail-caption{position:absolute;bottom:8px;left:10px;border-radius:4px;padding:2px 6px;background:#fff9;color:#586d82;font-size:11px}.workpiece-body{padding:14px;display:flex;flex-direction:column;gap:9px;flex:1;min-width:0}.workpiece-body h3{font-size:16px;line-height:1.45;overflow-wrap:anywhere}.workpiece-status .badge{white-space:normal}.workpiece-counts{display:flex;gap:20px;margin:0;padding:5px 0}.workpiece-counts>div{display:flex;flex-direction:column}.workpiece-counts dt{font-size:12px;color:var(--muted)}.workpiece-counts dd{margin:1px 0 0;font-size:19px;font-weight:650;color:#29455f}.workpiece-note{line-height:1.5}.workpiece-actions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;margin-top:auto;padding-top:5px}.workpiece-actions a,.workpiece-actions button{font-size:13px;min-height:44px;display:flex;align-items:center;justify-content:center;border:1px solid #c4d1df;border-radius:7px;text-decoration:none;padding:8px 5px;font-weight:600;text-align:center}.workpiece-actions .primary-link{background:var(--primary);border-color:var(--primary);color:#fff}.workpiece-actions .replan-link{color:#205eaa;background:#edf4fc}.workpiece-actions a:hover{border-color:#5682b7;filter:brightness(.98)}
.case-library>summary{display:flex;gap:10px;align-items:center;flex-wrap:wrap;cursor:pointer;min-height:48px;font-size:20px;font-weight:650;list-style:none;margin:0}.case-library>summary:before{content:'▸';color:#567087}.case-library[open]>summary:before{content:'▾'}.case-library>summary .small{font-weight:400;margin-left:auto}.challenge-thumbnail{order:-1;position:relative;aspect-ratio:320/204;background:#eaf0f5;border-radius:8px;overflow:hidden}.challenge-thumbnail img{display:block;width:100%;height:100%;object-fit:contain}.challenge-thumbnail>span{position:absolute;bottom:6px;left:8px;font-size:11px;color:#607487;background:#fff9;padding:1px 5px;border-radius:4px}.public-intro .challenge-card{background:#fff;border-color:var(--border)}.challenge-actions button{min-height:44px;background:#edf4fc;color:#205eaa;font-size:14px}.challenge-actions a:first-child{color:#205eaa;background:#fff;border-color:#b7cce6}.case-account-note{font-weight:400;line-height:1.45}.case-boundary{margin:8px 0 0}.home-help{border-top:1px solid var(--border);padding-top:15px;margin-top:15px!important}.home-help a{display:inline-block;min-height:44px;padding:10px 0;font-size:14px}.public-intro .challenge-card p{font-size:13px}.case-library .challenge-card h2{font-size:17px}
@media(max-width:1100px){.project-list{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:800px){.project-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:12px}.workpiece-body{padding:12px}.workspace-heading{align-items:flex-start}.library-toolbar{justify-content:flex-end}.workspace-heading .muted{max-width:420px}}
@media(max-width:560px){.project-list{grid-template-columns:1fr;padding:12px}.workpiece-card{display:grid;grid-template-columns:112px minmax(0,1fr);align-items:start}.workpiece-preview{width:112px;aspect-ratio:1/1;border-radius:7px;margin:12px 0 0 10px}.workpiece-body{padding:12px 10px 12px 20px}.workpiece-counts{gap:18px}.workpiece-body h3{font-size:16px}.workpiece-note{display:none}.workpiece-counts dd{font-size:18px}.workpiece-actions{margin-left:-122px;margin-top:3px}.workpiece-status .badge{font-size:11px}.workpiece-body>p.muted.small{font-size:11px}.case-library>summary{font-size:18px}.case-library>summary .small{font-size:12px;margin-left:0}.public-intro .challenge-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.challenge-actions button{font-size:12px;padding:8px 4px}.library-toolbar button{padding:8px 10px}.workspace-heading{gap:12px;flex-wrap:wrap}.library-toolbar{justify-content:flex-start}.workspace-heading h1{font-size:25px}.signed-in-home .public-intro{padding:14px}.upload-form input{font-size:16px}.project-list-panel>.section-heading{padding:14px 16px}.case-account-note{font-size:11px}}
@media(max-width:360px){.public-intro .challenge-grid{grid-template-columns:1fr}}

/* Standalone guide shares the portal's plain visual language and no account code. */
.help-page main{max-width:1000px}.help-page .help-lead{font-size:17px;color:var(--muted);margin:15px 0 22px}.help-nav{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}.help-nav a{padding:8px 13px;background:#fff;border:1px solid var(--border);border-radius:7px;min-height:44px;text-decoration:none}.help-section{padding:24px;margin:18px 0;scroll-margin-top:20px}.help-section h2{font-size:22px;margin-bottom:12px}.help-section h3{font-size:17px;margin:20px 0 8px}.help-section p,.help-section li{line-height:1.8}.help-section ol,.help-section ul{padding-left:24px}.help-section details{border-top:1px solid var(--border);margin-top:18px;padding-top:12px}.help-section summary{cursor:pointer;font-weight:650;min-height:44px}.help-section video{width:100%;max-width:720px;display:block;margin:12px 0;background:#1b2939}.help-table{width:100%;border-collapse:collapse}.help-table td,.help-table th{text-align:left;vertical-align:top;padding:10px;border-bottom:1px solid var(--border)}.help-table th{font-size:14px}.help-section .help-note{padding:12px 15px;background:#edf4fc;border-radius:8px}.help-case-links{display:flex;gap:12px;flex-wrap:wrap}.help-case-links a{min-height:44px;padding:9px 0}@media(max-width:560px){.help-page .site-header{height:auto;min-height:72px;flex-wrap:wrap}.help-section{padding:18px}.help-table{font-size:13px}.help-table td,.help-table th{padding:8px 5px}}
.library-sort{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--muted)}.library-sort select{width:auto;max-width:100%;min-height:40px;padding:7px 10px;font-size:13px}.project-list-panel>.section-heading h2{display:flex;align-items:center;gap:9px}.project-list-panel>.section-heading{gap:12px;flex-wrap:wrap}

.library-first-use{padding:20px;margin:12px 0;border:1px solid #9abdc0;border-radius:10px;background:#edf6f5}.library-first-use h3{margin:0 0 8px}.library-first-use p{line-height:1.6}.library-first-use button{min-height:44px}

/* Public invitation contact stays outside both authentication-only sections. */
.header-contact{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 12px;font-size:14px;font-weight:600;white-space:nowrap;text-underline-offset:4px}
.public-contact{display:flex;align-items:center;justify-content:space-between;gap:28px;margin:24px 0;scroll-margin-top:20px;background:#f7fafc}
.public-contact-copy{max-width:720px;min-width:0}.public-contact-copy h2{font-size:23px;margin:4px 0 12px}.public-contact-copy>p{line-height:1.7}.public-contact-copy .eyebrow{margin:0}
.public-contact-id{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin:16px 0 4px}.public-contact-id code{user-select:all;font-size:18px;font-weight:650;letter-spacing:.02em;color:#203a54}.public-contact-id button{min-height:44px}.public-contact-status{min-height:1.5em;margin:4px 0}
.public-contact-qr{flex:0 0 180px;margin:0;text-align:center}.public-contact-qr img{display:block;width:180px;height:auto;max-width:100%;background:#fff}.public-contact-qr figcaption{font-size:13px;color:var(--muted);margin-top:6px}
.registration-contact{display:inline-block;min-height:44px;padding:10px 0}
@media(max-width:560px){.header-contact{font-size:13px;padding:8px}.public-contact{flex-direction:column;align-items:stretch;gap:14px;padding:18px}.public-contact-copy h2{font-size:21px}.public-contact-qr{flex:none;align-self:center}.public-contact-id{gap:8px}.public-contact-id code{font-size:17px}.public-contact-id button{margin-left:auto}}