:root{--challenge-bg:#06040f;--challenge-bg-2:#0c0824;--challenge-purple:#6c3fff;--challenge-purple-soft:#8b63ff;--challenge-cyan:#38c5f5;--challenge-yellow:#ffc93e;--challenge-green:#2ecb8a;--challenge-orange:#ff7b39;--challenge-pink:#ff5fa0;--challenge-text:#fff;--challenge-text-sub:#ffffff9e}.challenge-list-shell{min-height:100vh;color:var(--challenge-text);background:radial-gradient(circle at top left, #6c3fff2e, transparent 32%), radial-gradient(circle at top right, #38c5f51f, transparent 28%), linear-gradient(180deg, var(--challenge-bg) 0%, var(--challenge-bg-2) 100%);font-family:inherit;position:relative;overflow:hidden}.challenge-list-shell:before{content:"";z-index:0;pointer-events:none;opacity:.14;background-color:#0000;background-image:linear-gradient(#ffffff0a 1px,#0000 1px),linear-gradient(90deg,#ffffff0a 1px,#0000 1px);background-position:0 0,0 0;background-repeat:repeat,repeat;background-size:48px 48px;background-attachment:scroll,scroll;background-origin:padding-box,padding-box;background-clip:border-box,border-box;position:fixed;inset:0;-webkit-mask-image:radial-gradient(circle,#000 38%,#0000 88%);mask-image:radial-gradient(circle,#000 38%,#0000 88%)}.challenge-list-bg{z-index:0;pointer-events:none;position:fixed;inset:0}.list-orb{filter:blur(84px);opacity:.45;border-radius:50%;animation:16s ease-in-out infinite listFloat;position:absolute}.orb-a{background:radial-gradient(circle,#6c3fffa3,#0000 70%);width:360px;height:360px;top:-80px;left:-40px}.orb-b{background:radial-gradient(circle,#38c5f573,#0000 70%);width:320px;height:320px;animation-delay:-5s;top:28%;right:-60px}.orb-c{background:radial-gradient(circle,#ff5fa059,#0000 70%);width:280px;height:280px;animation-delay:-10s;bottom:-80px;left:30%}@keyframes listFloat{0%,to{transform:translate(0,0)scale(1)}50%{transform:translateY(-24px)scale(1.06)}}.challenge-list-page{z-index:1;max-width:1180px;margin:0 auto;padding:0 24px 88px;position:relative}.challenge-nav{z-index:20;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid #6c3fff2e;justify-content:space-between;align-items:center;gap:14px;margin:0 -24px;padding:14px 24px;display:flex;position:sticky;top:0}.nav-logo,.nav-back{align-items:center;gap:10px;text-decoration:none;display:inline-flex}.nav-logo{color:#fff;font-size:.98rem;font-weight:700}.nav-logo:has(.brand-logo--surface-dark){font-size:0;line-height:0}.nav-logo .brand-logo__word{font-size:.98rem;font-weight:700}.nav-logo-ico{background:linear-gradient(135deg, var(--challenge-purple), var(--challenge-purple-soft));border-radius:9px;justify-content:center;align-items:center;width:30px;height:30px;font-size:.72rem;display:flex;box-shadow:0 8px 20px #6c3fff47}.nav-back{color:#ffffff80;font-size:.78rem;font-weight:800;transition:color .2s}.nav-back:hover{color:#fff}.nav-right{align-items:center;gap:10px;display:flex}.nav-auth-btn{color:#fff;background:linear-gradient(135deg, var(--challenge-purple), var(--challenge-purple-soft));border-radius:999px;justify-content:center;align-items:center;min-height:38px;padding:0 15px;font-size:.72rem;font-weight:700;display:inline-flex;box-shadow:0 10px 24px #6c3fff3d}.nav-xp{color:var(--challenge-yellow);background:#ffc13e1f;border:1px solid #ffc13e3d;border-radius:999px;align-items:center;gap:6px;padding:7px 13px;font-size:.72rem;font-weight:700;display:inline-flex}.challenge-list-hero{text-align:center;padding:62px 0 30px;position:relative}.hero-glow{background:radial-gradient(circle,#6c3fff3d,#0000 68%);border-radius:50%;width:620px;height:620px;animation:7s ease-in-out infinite alternate heroPulse;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}@keyframes heroPulse{0%{transform:translate(-50%,-50%)scale(1)}to{transform:translate(-50%,-50%)scale(1.12)}}.hero-content{z-index:1;position:relative}.hero-badge-row{flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;margin-bottom:14px;display:flex}.hero-kicker,.section-overline{letter-spacing:.14em;text-transform:uppercase;color:#ffffff5c;margin-bottom:12px;font-size:.68rem;font-weight:700}.challenge-list-hero h1,.loading-list-card h1{letter-spacing:-.04em;background:linear-gradient(135deg,#fff,#ffffffbd);color:#0000;-webkit-background-clip:text;background-clip:text;max-width:760px;margin:0 auto 14px;font-size:clamp(2.1rem,4.8vw,3.8rem);font-weight:700;line-height:1.03}.challenge-list-hero p,.loading-list-card p{max-width:720px;color:var(--challenge-text-sub);margin:0 auto;font-size:.94rem;font-weight:600;line-height:1.8}.hero-stat-row{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:26px;display:flex}.hero-stat-card{background:#ffffff0d;border:1px solid #ffffff14;border-radius:18px;min-width:160px;padding:15px 18px;box-shadow:0 14px 34px #0000002e}.hero-stat-label{letter-spacing:.1em;text-transform:uppercase;color:#ffffff57;margin-bottom:8px;font-size:.62rem;font-weight:700;display:block}.hero-stat-card strong{font-variant-numeric:tabular-nums;color:#fff;font-family:inherit;font-size:1.5rem;font-weight:700;line-height:1}.list-badge{letter-spacing:.04em;border:1px solid #0000;border-radius:999px;align-items:center;gap:6px;padding:6px 12px;font-size:.68rem;font-weight:700;display:inline-flex}.list-badge-live{color:var(--challenge-green);background:#2ecb8a1f;border-color:#2ecb8a3d}.list-badge-ended{color:#ffffff85;background:#ffffff0f;border-color:#ffffff1f}.list-badge-xp,.badge-diff-med{color:var(--challenge-yellow);background:#ffc13e1f;border-color:#ffc13e3d}.badge-diff-easy{color:var(--challenge-green);background:#2ecb8a1f;border-color:#2ecb8a3d}.badge-diff-hard{color:var(--challenge-pink);background:#ff5fa01f;border-color:#ff5fa03d}.list-badge-soft{color:var(--challenge-cyan);background:#38c5f51f;border-color:#38c5f53d}.current-challenge-card,.empty-list-card,.loading-list-card{-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:linear-gradient(140deg,#6c3fff2e,#38c5f514 44%,#ffffff0a),#ffffff0a;border:1px solid #ffffff14;border-radius:30px;gap:24px;padding:30px;display:grid;position:relative;overflow:hidden;box-shadow:0 18px 48px #0000004d}.current-challenge-card:before{content:"";pointer-events:none;background:linear-gradient(135deg,#ffffff14,#0000 26% 72%,#ffffff0d);border-radius:29px;position:absolute;inset:1px}.current-challenge-card{grid-template-columns:minmax(0,1fr) 320px;align-items:stretch}.current-challenge-empty,.loading-list-card,.empty-list-card{text-align:center;grid-template-columns:1fr}.current-copy,.current-preview-card,.empty-list-card,.loading-list-card{z-index:1;position:relative}.current-badges,.card-badges{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:16px;display:flex}.current-copy h2,.empty-list-card h4{letter-spacing:-.03em;margin:0 0 12px;font-size:clamp(1.8rem,3.4vw,2.8rem);font-weight:700;line-height:1.05}.current-copy p,.empty-list-card p{color:#ffffffad;margin:0;font-size:.94rem;font-weight:600;line-height:1.8}.current-requirement-strip{flex-wrap:wrap;gap:10px;margin-top:22px;display:flex}.current-requirement-pill{color:#ffffffc2;background:#ffffff0f;border:1px solid #ffffff14;border-radius:999px;align-items:center;gap:9px;padding:11px 14px;font-size:.76rem;font-weight:800;display:inline-flex}.current-requirement-dot{background:linear-gradient(135deg, var(--challenge-cyan), var(--challenge-purple-soft));border-radius:50%;flex-shrink:0;width:8px;height:8px}.current-meta{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:22px;display:grid}.meta-card{background:#ffffff0d;border:1px solid #ffffff14;border-radius:18px;padding:15px 16px}.meta-label{letter-spacing:.08em;text-transform:uppercase;color:#ffffff57;margin-bottom:6px;font-size:.62rem;font-weight:700;display:block}.meta-card strong{color:#fff;font-size:.86rem;line-height:1.45}.current-preview-card{background:#0c0824db;border:1px solid #6c3fff3d;border-radius:26px;flex-direction:column;justify-content:space-between;gap:18px;padding:24px;display:flex;box-shadow:inset 0 1px #ffffff0a}.current-preview-top{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.current-status-pill,.submission-pill{letter-spacing:.04em;text-transform:uppercase;border-radius:999px;justify-content:center;align-items:center;padding:7px 12px;font-size:.64rem;font-weight:700;display:inline-flex}.current-status-pill,.submission-approved{color:var(--challenge-green);background:#2ecb8a1f;border:1px solid #2ecb8a38}.submission-pending{color:var(--challenge-yellow);background:#ffc13e1f;border:1px solid #ffc13e38}.submission-rejected{color:var(--challenge-pink);background:#ff5fa01f;border:1px solid #ff5fa038}.current-preview-orbit{justify-content:center;align-items:center;padding:12px 0;display:flex}.orbit-core{background:radial-gradient(circle,#6c3fff3d,#0000 66%),#ffffff08;border:1px solid #ffffff1a;border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:170px;height:170px;display:flex;position:relative;box-shadow:0 0 0 14px #6c3fff14,0 0 0 28px #38c5f50a}.orbit-value{font-variant-numeric:tabular-nums;color:#fff;font-family:inherit;font-size:1.8rem;font-weight:700;line-height:1;display:block}.orbit-label{letter-spacing:.08em;text-transform:uppercase;color:#fff6;margin-top:8px;font-size:.68rem;font-weight:800}.current-preview-list{flex-direction:column;gap:10px;display:flex}.preview-row{color:#ffffff85;background:#ffffff0a;border:1px solid #ffffff14;border-radius:14px;justify-content:space-between;align-items:center;gap:14px;padding:12px 14px;font-size:.76rem;font-weight:700;display:flex}.preview-row strong{text-align:right;color:#fff}.current-cta,.card-cta{color:#fff;background:linear-gradient(135deg, var(--challenge-purple), var(--challenge-purple-soft));border-radius:999px;justify-content:center;align-items:center;min-height:50px;padding:12px 16px;font-size:.86rem;font-weight:700;text-decoration:none;transition:transform .2s,box-shadow .2s,opacity .2s;display:inline-flex;box-shadow:0 12px 30px #6c3fff5c}.current-cta:hover,.card-cta:hover{transform:translateY(-2px);box-shadow:0 16px 34px #6c3fff6b}.card-cta.disabled{color:#fff6;box-shadow:none;cursor:not-allowed;background:#ffffff0f;border:1px solid #ffffff1a}.challenge-list-section{margin-top:38px}.section-head{justify-content:space-between;align-items:flex-end;gap:18px;margin-bottom:18px;display:flex}.section-head h3{margin:0;font-size:1.55rem;font-weight:700}.section-count{color:#ffffff85;font-size:.78rem;font-weight:800}.challenge-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.archive-grid .challenge-card.is-expired{opacity:.74}.challenge-card{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffff0a;border:1px solid #ffffff14;border-radius:24px;flex-direction:column;gap:16px;min-height:100%;padding:22px;transition:transform .2s,border-color .2s,box-shadow .2s;display:flex;position:relative;overflow:hidden;box-shadow:0 12px 28px #0000002e}.challenge-card:before{content:"";opacity:.9;width:100%;height:4px;position:absolute;inset:0 auto auto 0}.challenge-card.is-live:before{background:linear-gradient(90deg, var(--challenge-green), var(--challenge-cyan), var(--challenge-purple-soft))}.challenge-card.is-expired:before{background:linear-gradient(90deg,#ffffff2e,#ffffff14)}.challenge-card.is-live:hover{border-color:#6c3fff38;transform:translateY(-4px);box-shadow:0 18px 40px #0000003d}.challenge-card.is-expired{filter:saturate(.76)}.challenge-card-top{justify-content:space-between;align-items:flex-start;gap:12px;display:flex}.challenge-card-body{flex-direction:column;flex:1;gap:14px;display:flex}.challenge-card-copy h4{margin:0 0 8px;font-size:1.18rem;font-weight:700;line-height:1.2}.challenge-card-copy p{color:#ffffffa3;margin:0;font-size:.84rem;font-weight:600;line-height:1.72}.card-info-list{background:#ffffff0a;border:1px solid #ffffff12;border-radius:16px;flex-direction:column;gap:8px;padding:12px 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(max-width:720px){.challenge-list-page{padding-bottom:56px;padding-left:16px;padding-right:16px}.challenge-nav{flex-wrap:wrap;justify-content:space-between;margin-left:-16px;margin-right:-16px;padding-left:16px;padding-right:16px}.challenge-list-hero{padding-top:42px}.hero-stat-row{flex-direction:column;align-items:stretch}.hero-stat-card{min-width:0}.current-challenge-card,.empty-list-card,.loading-list-card,.challenge-card{padding:20px}.current-preview-card{padding:18px}.orbit-core{width:148px;height:148px;box-shadow:0 0 0 12px #6c3fff14,0 0 0 24px #38c5f50a}.section-head{flex-direction:column;align-items:flex-start}}