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var(--border-color);width:100%;max-width:440px;box-shadow:var(--shadow-xl);overflow:hidden}.auth-header{padding:var(--space-8) var(--space-6) var(--space-4);text-align:center}.auth-header h2{font-size:var(--text-2xl);margin-bottom:var(--space-1)}.auth-form{padding:0 var(--space-6) var(--space-6)}.role-security-note{align-items:flex-start;gap:var(--space-2);padding:var(--space-3);border-radius:var(--radius-md);background-color:var(--bg-surface-secondary);border:1px solid var(--border-color);margin-top:var(--space-2);display:flex}.google-auth-btn{justify-content:center;align-items:center;gap:var(--space-3);background-color:var(--bg-surface);width:100%;color:var(--text-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:var(--text-sm);cursor:pointer;transition:all var(--transition-fast);box-shadow:var(--shadow-xs);margin-bottom:var(--space-4);padding:.75rem 1rem;font-weight:600;display:flex}.google-auth-btn:hover{background-color:var(--bg-surface-secondary);border-color:var(--text-muted);box-shadow:var(--shadow-sm);transform:translateY(-1px)}.google-auth-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.google-icon{flex-shrink:0;width:20px;height:20px}.auth-divider{text-align:center;margin:var(--space-4) 0;font-size:var(--text-xs);color:var(--text-muted);align-items:center;display:flex}.auth-divider:before,.auth-divider:after{content:"";border-bottom:1px solid var(--border-color);flex:1}.auth-divider span{padding:0 var(--space-3)}.demo-accounts-grid{gap:var(--space-2);padding:0 var(--space-6) var(--space-6);grid-template-columns:repeat(3,1fr);display:grid}.demo-role-btn{padding:var(--space-3) var(--space-2);font-size:var(--text-xs);text-align:center;flex-direction:column;align-items:center;gap:4px;display:flex}.auth-footer{padding:var(--space-4) var(--space-6);background-color:var(--bg-surface-secondary);border-top:1px solid var(--border-color);text-align:center}.landing-root{background-color:var(--bg-app);flex-direction:column;min-height:100vh;display:flex}.landing-nav{height:70px;padding:0 var(--space-8);background-color:var(--bg-surface);border-bottom:1px solid var(--border-color);z-index:100;justify-content:space-between;align-items:center;display:flex;position:sticky;top:0}.landing-nav-actions{align-items:center;gap:var(--space-3);display:flex}.landing-hero{padding:var(--space-12) var(--space-6);text-align:center;background:radial-gradient(circle at 50% 0%, var(--primary-light) 0%, transparent 60%)}.hero-content{max-width:900px;margin:0 auto}.hero-badge{align-items:center;gap:var(--space-2);background-color:var(--bg-surface);border:1px solid var(--primary-border);border-radius:var(--radius-full);font-size:var(--text-xs);color:var(--primary);margin-bottom:var(--space-5);box-shadow:var(--shadow-sm);padding:.35rem .85rem;font-weight:600;display:inline-flex}.hero-title{letter-spacing:-.02em;margin-bottom:var(--space-5);font-size:clamp(2rem,5vw,3.5rem);font-weight:800;line-height:1.15}.gradient-text{background:var(--gradient-primary);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.hero-description{font-size:var(--text-lg);color:var(--text-secondary);max-width:680px;margin:0 auto var(--space-8);line-height:1.6}.hero-cta-group{justify-content:center;align-items:center;gap:var(--space-4);flex-wrap:wrap;display:flex}.hero-demo-bar{margin-top:var(--space-8);justify-content:center;align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.demo-click-chip{cursor:pointer;transition:transform var(--transition-fast)}.demo-click-chip:hover{transform:translateY(-2px)}.landing-section{padding:var(--space-10) var(--space-8);width:100%;max-width:1280px;margin:0 auto}.section-header{text-align:center;margin-bottom:var(--space-8)}.section-eyebrow{font-size:var(--text-xs);color:var(--primary);letter-spacing:1px;margin-bottom:var(--space-2);font-weight:700;display:block}.section-header h2{font-size:var(--text-3xl)}.feature-card{padding:var(--space-8);gap:var(--space-4);flex-direction:column;display:flex}.feature-icon{border-radius:var(--radius-lg);justify-content:center;align-items:center;width:52px;height:52px;display:flex}.icon-purple{color:#635bff;background-color:#eef2ff}.icon-blue{color:#2563eb;background-color:#eff6ff}.icon-pink{color:#db2777;background-color:#fdf2f8}.feature-list{gap:var(--space-2);font-size:var(--text-xs);color:var(--text-secondary);flex-direction:column;margin-top:auto;list-style:none;display:flex}.feature-list li{align-items:center;gap:var(--space-2);display:flex}.domain-preview-card{transition:transform var(--transition-normal);overflow:hidden}.domain-preview-card:hover{transform:translateY(-4px)}.domain-preview-thumb{height:140px;padding:var(--space-3);background-position:50%;background-size:cover;justify-content:flex-end;align-items:flex-start;display:flex}.clan-banner-card{background:radial-gradient(circle at 100% 0%, var(--primary-light) 0%, var(--bg-surface) 60%);padding:var(--space-8);border-color:var(--primary-border)}.clan-banner-content{gap:var(--space-4);flex-direction:column;max-width:800px;display:flex}.clan-chips-row{gap:var(--space-3);margin-top:var(--space-2);flex-wrap:wrap;display:flex}.clan-chip{align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-full);box-shadow:var(--shadow-xs);display:flex}.clan-chip-logo{border-radius:50%;width:24px;height:24px}.clan-chip-name{font-size:var(--text-xs);font-weight:600}.clan-chip-pts{font-size:var(--text-xs);color:var(--primary);font-weight:700}.landing-footer{padding:var(--space-8);border-top:1px solid var(--border-color);text-align:center;margin-top:auto}.student-welcome-banner{padding:var(--space-6) var(--space-8);justify-content:space-between;align-items:center;gap:var(--space-6);background:radial-gradient(circle at 10% 50%, var(--primary-light) 0%, var(--bg-surface) 60%);border-color:var(--primary-border);flex-wrap:wrap;display:flex}.welcome-greeting-row{align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.welcome-clan-snippet{align-items:center;gap:var(--space-4);background-color:var(--bg-surface);border:1px solid var(--border-color);padding:var(--space-2) var(--space-4);border-radius:var(--radius-lg);box-shadow:var(--shadow-xs);display:flex}.clan-snippet-badge{align-items:center;gap:var(--space-2);display:flex}.clan-snippet-logo{border:2px solid var(--primary-border);border-radius:50%;width:38px;height:38px}.clan-ranks-pill{border-left:1px solid var(--border-color);padding-left:var(--space-3);flex-direction:column;gap:3px;display:flex}.stat-card{padding:var(--space-5);align-items:center;gap:var(--space-4);display:flex}.stat-icon-wrap{border-radius:var(--radius-md);flex-shrink:0;justify-content:center;align-items:center;width:48px;height:48px;display:flex}.stat-data{flex-direction:column;flex:1;display:flex}.stat-label{font-size:var(--text-xs);color:var(--text-muted);font-weight:600}.stat-value{font-size:var(--text-2xl);color:var(--text-primary);margin:2px 0;font-weight:700;line-height:1.1}.next-task-focus{padding:var(--space-4);background-color:var(--bg-surface-secondary);border-radius:var(--radius-lg);border:1px solid var(--border-color)}.next-task-header-row{justify-content:space-between;align-items:flex-start;display:flex}.requirements-checklist{flex-direction:column;gap:6px;margin-top:6px;list-style:none;display:flex}.next-task-actions{gap:var(--space-3);margin-top:var(--space-5);flex-wrap:wrap;display:flex}.stage-progress-item{align-items:center;gap:var(--space-3);padding:var(--space-2) 0;display:flex}.stage-progress-item.active .stage-num{background-color:var(--primary);color:#fff}.stage-num{background-color:var(--bg-surface-secondary);width:28px;height:28px;color:var(--text-muted);font-size:var(--text-xs);border-radius:50%;justify-content:center;align-items:center;font-weight:700;display:flex}.module-tabs-bar{gap:var(--space-2);padding-bottom:4px;display:flex;overflow-x:auto}.module-tab-btn{padding:.6rem var(--space-4);background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;white-space:nowrap;transition:all var(--transition-fast);text-align:left;flex-direction:column;display:flex}.module-tab-btn:hover{background-color:var(--bg-surface-secondary)}.module-tab-btn.active{background-color:var(--primary-light);border-color:var(--primary)}.tab-stage-num{color:var(--primary);text-transform:uppercase;font-size:.6875rem;font-weight:700}.tab-stage-title{font-size:var(--text-xs);color:var(--text-primary);font-weight:600}.resource-item-card{gap:var(--space-4);padding:var(--space-4);background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);transition:all var(--transition-normal);display:flex}.resource-item-card:hover{border-color:var(--primary-border);box-shadow:var(--shadow-sm)}.resource-item-card.completed{border-left:4px solid var(--color-success)}.resource-item-card.locked{opacity:.65;background-color:var(--bg-surface-secondary)}.resource-icon-wrap{border-radius:var(--radius-md);background-color:var(--primary-light);flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;display:flex}.resource-header-row{align-items:center;gap:var(--space-2);display:flex}.locked-notice{background-color:var(--bg-surface-tertiary);border-radius:var(--radius-sm);align-items:center;gap:6px;padding:6px 10px;display:flex}.task-select-item{align-items:center;gap:var(--space-3);width:100%;padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);background-color:#0000;border:1px solid #0000;margin-bottom:4px;display:flex}.task-select-item:hover{background-color:var(--bg-surface-secondary)}.task-select-item.active{background-color:var(--primary-light);border-color:var(--primary-border)}.task-select-item.locked{opacity:.6}.version-row{padding:var(--space-4) var(--space-6);border-bottom:1px solid var(--border-color)}.version-row:last-child{border-bottom:none}.version-meta{justify-content:space-between;align-items:center;display:flex}.version-repo-link{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--primary);background-color:var(--bg-surface-secondary);border-radius:var(--radius-sm);align-items:center;gap:6px;padding:4px 10px;display:inline-flex}.mentor-feedback-box{margin-top:var(--space-3);padding:var(--space-3);background-color:var(--bg-surface-secondary);border-radius:var(--radius-md);border-left:3px solid var(--primary)}.arena-hero-banner{color:#fff;padding:var(--space-8);justify-content:space-between;align-items:center;gap:var(--space-6);background:radial-gradient(circle at 100%,#4338ca 0%,#111827 80%);flex-wrap:wrap;display:flex}.arena-title{letter-spacing:-.01em;margin:var(--space-2) 0;color:#fff;font-size:clamp(1.75rem,4vw,2.5rem);font-weight:800}.arena-top-clan-podium{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:var(--space-5);border-radius:var(--radius-xl);text-align:center;background-color:#ffffff14;border:1px solid #ffffff26;min-width:220px}.podium-clan-logo{border:2px solid #fcd34d;border-radius:50%;width:56px;height:56px;margin:6px auto}.arena-controls-bar{justify-content:space-between;align-items:center;gap:var(--space-4);flex-wrap:wrap;display:flex}.dual-ranking-toggle{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);gap:4px;padding:4px;display:flex}.ranking-toggle-btn{align-items:center;gap:var(--space-2);color:var(--text-secondary);font-size:var(--text-xs);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);background-color:#0000;border:none;padding:.5rem 1rem;font-weight:600;display:flex}.ranking-toggle-btn.active{background-color:var(--primary);color:#fff;box-shadow:var(--shadow-sm)}.arena-clan-card{padding:var(--space-4) var(--space-6);align-items:center;gap:var(--space-5);transition:all var(--transition-fast);display:flex}.arena-clan-card:hover{transform:translate(4px)}.arena-rank-badge{align-items:center;gap:4px;min-width:50px;display:flex}.arena-clan-card.rank-gold{background:linear-gradient(90deg, #f59e0b0f 0%, var(--bg-surface) 30%);border-left:5px solid #f59e0b}.arena-clan-card.rank-silver{border-left:5px solid #94a3b8}.arena-clan-card.rank-bronze{border-left:5px solid #b45309}.arena-clan-emblem{border-radius:50%;flex-shrink:0;width:44px;height:44px}.arena-clan-points{align-items:center;gap:var(--space-5);display:flex}.ledger-feed-list{flex-direction:column;display:flex}.feed-item{padding:var(--space-3) var(--space-6);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;display:flex}.feed-item:last-child{border-bottom:none}.feed-bullet{background-color:var(--primary);border-radius:50%;width:8px;height:8px}.theme-card-btn{padding:var(--space-4);background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-fast);color:var(--text-primary);flex-direction:column;align-items:center;gap:8px;display:flex}.theme-card-btn:hover{background-color:var(--bg-surface-secondary)}.theme-card-btn.active{border-color:var(--primary);background-color:var(--primary-light);color:var(--primary);font-weight:700}.accent-card-btn{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);color:var(--text-primary);align-items:center;gap:8px;padding:8px 12px;display:flex;position:relative}.accent-card-btn:hover{background-color:var(--bg-surface-secondary)}.accent-card-btn.active{border-color:var(--primary)}.accent-check{color:var(--primary);margin-left:auto}.filter-pill-group{gap:var(--space-2);display:flex}#root{flex-direction:column;min-height:100vh;display:flex}