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12px;display:flex}.step-btn:hover{background:var(--surface-card-hover);border-color:var(--border-color-strong)}.step-btn:active{transform:scale(.98)}.step-btn:disabled{opacity:.45;cursor:not-allowed;background:var(--surface-bg);border-color:var(--border-color);color:var(--text-muted);box-shadow:none;transform:none}.step-btn:disabled:hover{background:var(--surface-bg);border-color:var(--border-color)}.step-btn:disabled:active{transform:none}.app{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-width);background:var(--surface-sidebar);z-index:50;transition:transform var(--transition-normal);border-right:1px solid #ffffff0d;flex-direction:column;display:flex;position:fixed;top:0;bottom:0;left:0}[data-theme=light] .sidebar{border-right-color:#0f172a14;box-shadow:8px 0 32px #0f172a0d}.sidebar__header{align-items:center;gap:var(--space-3);padding:var(--space-5) var(--space-5);cursor:pointer;border-bottom:1px solid #ffffff0f;display:flex}[data-theme=light] 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.sidebar__item.active:before{background:var(--color-primary-500)}.sidebar__item-icon{width:20px;height:20px;font-size:var(--text-base);opacity:.8;flex-shrink:0;justify-content:center;align-items:center;display:flex}.sidebar__item.active .sidebar__item-icon{opacity:1}.sidebar__item-badge{border-radius:var(--radius-full);font-size:11px;font-weight:var(--font-semibold);margin-left:auto;padding:1px 8px}.sidebar__item-badge--done{color:var(--color-success);background:#22c55e26}.sidebar__item-badge--progress{color:var(--color-primary-400);background:#3b82f626}.sidebar__item-badge--locked{color:#ffffff40;background:#64748b1a}[data-theme=light] .sidebar__item-badge--locked{color:#475569b8;background:#94a3b829}.sidebar__footer{padding:var(--space-4) var(--space-4);border-top:1px solid #ffffff0f}[data-theme=light] .sidebar__footer{border-top-color:#0f172a14}.sidebar__theme-toggle{align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);color:var(--text-sidebar);font-size:var(--text-sm);width:100%;transition:all var(--transition-fast);display:flex}.sidebar__theme-toggle:hover{background:var(--surface-sidebar-hover);color:var(--text-sidebar-active)}.theme-toggle-track{border-radius:var(--radius-full);width:40px;height:22px;transition:background var(--transition-fast);background:#ffffff26;flex-shrink:0;margin-left:auto;position:relative}[data-theme=light] .theme-toggle-track{background:#94a3b847}.theme-toggle-thumb{width:16px;height:16px;transition:transform var(--transition-fast);background:#fff;border-radius:50%;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #0000004d}[data-theme=dark] .theme-toggle-thumb{transform:translate(18px)}[data-theme=dark] .theme-toggle-track{background:var(--color-primary-600)}.main{margin-left:var(--sidebar-width);flex-direction:column;flex:1;min-height:100vh;display:flex}.header{height:var(--header-height);padding:0 var(--space-8);background:var(--surface-card);border-bottom:1px solid var(--border-color);z-index:40;-webkit-backdrop-filter:blur(12px);justify-content:space-between;align-items:center;display:flex;position:sticky;top:0}[data-theme=dark] .header{background:#111827cc}.header__left{align-items:center;gap:var(--space-4);display:flex}.header__breadcrumb{align-items:center;gap:var(--space-2);font-size:var(--text-sm);color:var(--text-secondary);display:flex}.header__crumb-home{color:inherit;font:inherit;transition:color var(--transition-fast);background:0 0;border:0;padding:0}.header__crumb-home:hover{color:var(--text-primary)}.header__breadcrumb-sep{color:var(--text-muted)}.header__breadcrumb-current{color:var(--text-primary);font-weight:var(--font-medium)}.header__right{align-items:center;gap:var(--space-3);display:flex}.header__menu-btn{padding:var(--space-2);color:var(--text-secondary);border-radius:var(--radius-md);display:none}.header__menu-btn:hover{background:var(--surface-card-hover)}[data-theme=light] .header__menu-btn{color:var(--text-primary)}.content{padding:var(--space-6);flex-direction:column;flex:1;display:flex}.content__max{flex-direction:column;flex:1;width:100%;max-width:1400px;margin:0 auto;display:flex}.home-page{gap:var(--space-6);flex-direction:column;display:flex}.home-hero{gap:var(--space-6);grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);align-items:stretch;display:grid}.home-hero__eyebrow,.home-section-heading__eyebrow,.level-page__eyebrow,.level-page__roadmap-eyebrow,.home-level-card__eyebrow{margin-bottom:var(--space-2);font-size:var(--text-xs);font-weight:var(--font-semibold);letter-spacing:.08em;text-transform:uppercase;color:var(--color-primary-500);display:inline-flex}.home-hero__title{letter-spacing:-.03em;color:var(--text-primary);max-width:14ch;font-size:clamp(2rem,3.4vw,3.25rem);line-height:1.02}.home-hero__desc{margin-top:var(--space-4);color:var(--text-secondary);max-width:60ch;font-size:var(--text-base)}.home-hero__actions{gap:var(--space-3);margin-top:var(--space-5);flex-wrap:wrap;display:flex}.home-hero__summary{gap:var(--space-3);display:grid}.home-summary-card{border-radius:var(--radius-lg);padding:var(--space-4);background:linear-gradient(#2f79f01f,#2f79f00a);border:1px solid #2f79f029}[data-theme=dark] 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