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200px;flex-direction:column;gap:8px;justify-content:flex-start;min-width:0}.editor-settings-modal__label{color:var(--nn-text-primary);font-size:14px;font-weight:600;margin:0}.editor-settings-modal__select{-webkit-appearance:none;appearance:none;background:var(--nn-bg-panel-alt);background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12'%3E%3Cpath fill='%238FA1B3' d='m3 4.5 3 3 3-3'/%3E%3C/svg%3E");background-position:right 10px center;background-repeat:no-repeat;border:1px solid var(--nn-border);border-radius:8px;color:var(--nn-text-primary);cursor:pointer;font-size:14px;line-height:1.3;padding:9px 32px 9px 12px;width:100%}.editor-settings-modal__select:hover{border-color:var(--nn-accent-soft)}.editor-settings-modal__select:focus{border-color:var(--nn-accent-soft);box-shadow:0 0 0 2px #4caf5033;outline:none}.editor-settings-modal__preview{border:1px solid var(--nn-border);border-radius:8px;flex:1 1;min-height:168px;min-width:0;overflow:hidden}.editor-settings-modal__hint{color:var(--nn-text-secondary);font-size:12px;line-height:1.45;margin:6px 0 12px}.editor-settings-modal__hint--solo{margin-bottom:0}.editor-settings-modal__token-grid{display:flex;flex-direction:column;gap:8px}.editor-settings-modal__token-row{grid-gap:8px;align-items:center;display:grid;gap:8px}.editor-settings-modal__token-row--preset{grid-template-columns:minmax(88px,110px) 20px minmax(108px,1fr) 32px}.editor-settings-modal__token-row--custom{grid-template-columns:minmax(88px,110px) 20px minmax(108px,1fr)}.editor-settings-modal__token-label{color:var(--nn-text-secondary);font-size:12px}.editor-settings-modal__token-swatch{border:1px solid #ffffff1f;border-radius:4px;height:20px;width:20px}.editor-settings-modal__token-input{background:var(--nn-bg-panel-alt);border:1px solid var(--nn-border);border-radius:6px;color:var(--nn-text-primary);font-family:Consolas,Courier New,monospace;font-size:12px;min-width:108px;padding:7px 10px;width:100%}.editor-settings-modal__token-input:focus{border-color:var(--nn-accent-soft);outline:none}.editor-settings-modal__token-input--readonly{cursor:default;opacity:.85;-webkit-user-select:all;user-select:all}.editor-settings-modal__token-copy{align-items:center;background:var(--nn-bg-panel-alt);border:1px solid var(--nn-border);border-radius:6px;color:var(--nn-text-secondary);cursor:pointer;display:inline-flex;height:32px;justify-content:center;width:32px}.editor-settings-modal__token-copy:hover{border-color:var(--nn-accent-soft);color:var(--nn-text-primary)}.editor-settings-modal__apply-btn{background:#4caf5026;border:1px solid var(--nn-accent-soft);border-radius:8px;color:var(--nn-text-primary);cursor:pointer;font-size:14px;font-weight:600;padding:10px 14px;width:100%}.editor-settings-modal__apply-btn:hover:not(:disabled){background:#4caf5040}.editor-settings-modal__apply-btn:disabled{cursor:not-allowed;opacity:.45}.editor-settings-modal__reset-btn{background:var(--nn-bg-panel-alt);border:1px solid var(--nn-border);border-radius:8px;color:var(--nn-text-primary);cursor:pointer;font-size:14px;font-weight:500;padding:10px 14px;width:100%}.editor-settings-modal__reset-btn:hover:not(:disabled){background:var(--nn-bg-elevated);border-color:var(--nn-accent-soft)}.editor-settings-modal__reset-btn:disabled{cursor:not-allowed;opacity:.5}@media (max-width:560px){.editor-settings-modal__theme-layout{flex-direction:column}.editor-settings-modal__theme-controls{flex-basis:auto}.editor-settings-modal__token-row--preset{grid-template-columns:minmax(72px,1fr) 20px minmax(100px,1.4fr) 32px}.editor-settings-modal__token-row--custom{grid-template-columns:minmax(72px,1fr) 20px minmax(100px,1.6fr)}}@keyframes editorSettingsModalFadeIn{0%{opacity:0}to{opacity:1}}@keyframes editorSettingsModalSlideIn{0%{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:translateY(0)}}.problem-page{background-color:var(--nn-bg-workspace);color:var(--nn-text-primary);display:flex;flex:1 1;gap:0;height:100vh;margin:0;min-height:0;overflow:hidden;padding:0}.problem-icon-rail{--rail-width:var(--nn-problem-rail-width);align-items:stretch;background:var(--nn-bg-workspace);border-right:1px solid var(--nn-border);display:flex;flex:0 0 var(--rail-width);flex-direction:column;padding:12px 0 10px;transition:flex-basis .2s ease,width .2s ease;width:var(--rail-width)}.problem-icon-rail--collapsed{--rail-width:var(--nn-problem-rail-width-collapsed)}.problem-rail-nav{align-items:stretch;display:flex;flex:1 1;flex-direction:column;gap:2px;min-height:0;overflow-y:auto;padding:0 6px}.problem-rail-item{align-items:center;background:#0000;border:none;border-radius:var(--nn-radius-sm);color:var(--nn-text-rail);cursor:pointer;display:flex;flex-direction:column;gap:6px;justify-content:center;min-height:64px;padding:9px 4px;position:relative;text-decoration:none;transition:color .15s,background .15s;width:100%}.problem-rail-item:hover{background:var(--nn-bg-elevated);color:var(--nn-text-rail-hover)}.problem-rail-item.is-active{background:linear-gradient(90deg,var(--nn-accent-soft-14) 0,var(--nn-accent-soft-08) 55%,#0000 100%);color:var(--nn-accent-soft)}.problem-rail-item.is-active:before{background:var(--nn-accent-soft);border-radius:0 3px 3px 0;bottom:8px;box-shadow:0 0 10px var(--nn-accent-soft-55);content:"";left:0;position:absolute;top:8px;width:3px}.problem-rail-item.is-bookmarked{color:var(--nn-accent-soft)}.problem-rail-item.is-bookmarked .problem-rail-icon{filter:drop-shadow(0 0 6px var(--nn-accent-soft-35))}.problem-rail-icon{align-items:center;display:flex;justify-content:center;line-height:1}.problem-rail-icon svg{height:var(--nn-problem-rail-icon-size);width:var(--nn-problem-rail-icon-size)}.problem-rail-label{font-size:var(--nn-problem-rail-label-size);font-weight:500;letter-spacing:.01em;line-height:1.2;max-width:100%;overflow:hidden;text-align:center;text-overflow:ellipsis;white-space:nowrap}.problem-icon-rail--collapsed .problem-rail-label{height:0;opacity:0;overflow:hidden;width:0}.problem-icon-rail--collapsed .problem-rail-item{gap:0;min-height:52px}.problem-rail-collapse{align-items:center;background:var(--nn-bg-elevated);border:1px solid var(--nn-border);border-radius:50%;color:var(--nn-text-rail);cursor:pointer;display:flex;flex-shrink:0;height:32px;justify-content:center;margin:8px auto 0;padding:0;transition:border-color .15s,color .15s,background .15s;width:32px}.problem-rail-collapse:hover{background:var(--nn-accent-soft-08);border-color:var(--nn-accent-soft-45);color:var(--nn-accent-soft)}.problem-rail-collapse-icon{transition:transform .2s ease}.problem-rail-collapse-icon svg{height:14px;width:14px}.problem-rail-collapse-icon.is-flipped{transform:rotate(180deg)}.problem-workspace{--problem-editor-tabs-h:37px;--problem-editor-toolbar-h:47px;display:grid;flex:1 1;grid-template-columns:minmax(280px,30%) minmax(360px,1fr);min-height:0;min-width:0}.problem-workspace--with-notes{grid-template-columns:minmax(280px,30%) minmax(360px,1fr) minmax(220px,260px)}.problem-pane{background:var(--nn-bg-panel);border-right:1px solid var(--nn-border);display:flex;flex-direction:column;min-height:0;overflow:hidden}.problem-pane--side{background:var(--nn-bg-panel);border-right:none}.problem-pane--desc{overflow:hidden;position:relative}.problem-desc-resize-handle{background:#0000;cursor:col-resize;height:100%;position:absolute;right:-3px;top:0;touch-action:none;width:6px;z-index:3}.problem-desc-resize-handle:after{background:var(--nn-border);border-radius:999px;content:"";height:36px;left:50%;position:absolute;top:50%;transform:translate(-50%,-50%);transition:background .15s;width:3px}.problem-desc-resize-handle.is-dragging:after,.problem-desc-resize-handle:hover:after{background:var(--nn-accent-soft)}.problem-desc-resize-handle.is-dragging,.problem-desc-resize-handle:hover{background:var(--nn-accent-soft-08)}.problem-desc-toolbar{align-items:center;display:flex;flex-shrink:0;justify-content:space-between;padding:10px 14px 6px}.problem-back-link{align-items:center;color:var(--nn-text-secondary);display:inline-flex;font-size:13px;gap:8px;text-decoration:none;transition:color .15s}.problem-back-link:hover{color:var(--nn-text-primary)}.problem-class-banner{background:var(--nn-bg-card);border:1px solid var(--nn-border);border-radius:var(--nn-radius-sm);flex-shrink:0;margin:0 14px 10px;padding:10px 12px}.problem-class-banner__comment,.problem-class-banner__row{align-items:flex-start;display:flex;gap:10px}.problem-class-banner__comment{border-top:1px solid var(--nn-border);margin-top:10px;padding-top:10px}.problem-class-banner__icon{background:var(--nn-accent-12);border-radius:8px;color:var(--nn-accent-active);display:grid;flex-shrink:0;font-size:13px;height:28px;place-items:center;width:28px}.problem-class-banner__copy{align-items:baseline;display:flex;flex:1 1;flex-wrap:wrap;gap:6px 10px;min-width:0}.problem-class-banner__class{color:var(--nn-text-strong);font-weight:600;text-decoration:none}.problem-class-banner__class:hover{color:var(--nn-accent-active)}.problem-class-banner__lesson{color:var(--nn-text-secondary);font-size:13px}.problem-class-banner__due{color:var(--nn-text-muted);font-size:12px}.problem-class-banner__due.is-overdue{color:var(--nn-error);font-weight:600}.problem-class-banner__back{color:var(--nn-accent-active);font-size:13px;margin-left:auto;text-decoration:none;white-space:nowrap}.problem-class-banner__back:hover{text-decoration:underline}.problem-class-banner__comment-label{color:var(--nn-text-muted);font-size:12px;font-weight:600;margin-bottom:4px}.problem-class-banner__comment p{color:var(--nn-text-primary);font-size:13px;margin:0;white-space:pre-wrap}.problem-class-banner__open{background:none;border:none;color:var(--nn-accent-active);cursor:pointer;font:inherit;font-size:13px;margin-top:8px;padding:0}.problem-class-banner__open:hover{text-decoration:underline}.problem-class-banner__thread{flex:1 1;min-width:0}.problem-class-banner__list{display:flex;flex-direction:column;gap:8px;list-style:none;margin:0 0 8px;padding:0}.problem-class-banner__item p{color:var(--nn-text-primary);font-size:13px;margin:4px 0 0;white-space:pre-wrap}.problem-class-banner__item-role{color:var(--nn-text-muted);font-size:11px;font-weight:600}.problem-class-banner__item.is-student p{color:var(--nn-text-strong)}.problem-class-banner__reply{align-items:flex-start;display:flex;flex-direction:column;gap:6px;margin-top:8px}.problem-class-banner__reply-input{background:#0000;background:var(--nn-bg-workspace,#0000);border:1px solid var(--nn-border);border-radius:var(--nn-radius-sm);box-sizing:border-box;color:var(--nn-text-primary);font:inherit;font-size:13px;padding:8px 10px;resize:vertical;width:100%}.problem-class-banner__reply-error{color:var(--nn-error);font-size:12px}.problem-desc-actions{display:flex;gap:6px}.problem-icon-action{align-items:center;background:#0000;border:1px solid var(--nn-border);border-radius:var(--nn-radius-sm);color:var(--nn-text-secondary);cursor:pointer;display:flex;height:30px;justify-content:center;transition:border-color .15s,color .15s,background .15s;width:30px}.problem-icon-action.is-active,.problem-icon-action:hover{background:var(--nn-accent-soft-08);border-color:var(--nn-accent-soft-45);color:var(--nn-accent-soft)}.problem-title-block{flex-shrink:0;padding:0 14px 10px}.problem-title{color:var(--nn-text-strong);font-size:18px;font-weight:700;line-height:1.35;margin:0 0 8px}.problem-title-id{color:var(--nn-text-secondary);font-weight:600}.problem-title-meta{gap:8px;margin-bottom:10px}.problem-tags-row,.problem-title-meta{align-items:center;display:flex;flex-wrap:wrap}.problem-tags-row{gap:6px}.problem-topic-pill{background-color:var(--nn-bg-card);border:1px solid var(--nn-border);border-radius:999px;color:var(--nn-text-secondary);font-size:11px;font-weight:500;padding:3px 10px}.problem-difficulty-pill{align-items:center;display:inline-flex;font-size:12px;font-weight:600;gap:6px;margin-left:auto}.problem-difficulty-dot{border-radius:50%;height:8px;width:8px}.premium-badge--gold{background:linear-gradient(135deg,#d4a64a40,#d4a64a14);border:1px solid #d4a64a73;border-radius:999px;color:var(--nn-accent-premium);font-size:11px;font-weight:700;padding:3px 10px}.problem-solved-badge--compact{border-radius:999px;font-size:11px;padding:4px 8px}.problem-formulas-card{background:var(--nn-bg-panel-alt);border:1px solid var(--nn-border);border-radius:var(--nn-radius);flex-shrink:0;margin:8px 14px 14px;padding:12px 14px}.problem-formulas-title{color:var(--nn-text-secondary);font-size:12px;font-weight:600;margin:0 0 8px}.problem-formulas-list{color:var(--nn-text-secondary);font-size:12px;line-height:1.5;margin:0;padding-left:1.1rem}.problem-pane--editor{background:var(--nn-bg-panel);border-right:1px solid var(--nn-border);padding:0}.problem-pane--editor.code-editor{border-radius:0;max-width:none}.editor-file-tabs{align-items:center;background:var(--nn-bg-panel);border-bottom:1px solid var(--nn-border);display:flex;flex-shrink:0;gap:12px;justify-content:space-between;min-height:var(--problem-editor-tabs-h);padding:0 8px 0 0}.editor-file-tabs-left{align-items:stretch;display:flex;flex:1 1 auto;min-width:0;overflow-x:auto;padding-left:8px}.editor-file-tabs-actions{align-items:center;display:flex;flex-shrink:0;gap:10px;justify-content:flex-end;padding-right:8px}.editor-file-tab{background:#0000;border:none;border-bottom:2px solid #0000;color:var(--nn-text-secondary);cursor:default;font-size:12px;padding:8px 12px;white-space:nowrap}.editor-file-tab--active{background:var(--nn-accent-soft-06);border-bottom-color:var(--nn-accent-soft);color:var(--nn-text-strong)}.editor-file-tab--ghost{opacity:.55}.editor-file-tab--add{color:var(--nn-text-secondary);font-size:16px;line-height:1;padding:6px 10px}.editor-toolbar{align-items:center;background:var(--nn-bg-panel);border-bottom:1px solid var(--nn-border);display:flex;flex-shrink:0;gap:12px;justify-content:space-between;min-height:var(--problem-editor-toolbar-h);padding:8px 12px}.editor-toolbar-left{align-items:center;display:flex;gap:10px;min-width:0}.editor-toolbar-icon-btn{align-items:center;background:#0000;border:1px solid var(--nn-border);border-radius:var(--nn-radius-sm);color:var(--nn-text-secondary);cursor:pointer;display:flex;height:30px;justify-content:center;width:30px}.editor-toolbar-icon-btn:hover:not(:disabled){border-color:var(--nn-text-secondary);color:var(--nn-text-primary)}.editor-toolbar-icon-btn--admin{border-color:color-mix(in srgb,var(--nn-accent,#6c9eff) 45%,var(--nn-border));color:#6c9eff;color:var(--nn-accent,#6c9eff)}.editor-toolbar-icon-btn--admin:hover:not(:disabled){background:color-mix(in srgb,#6c9eff 10%,#0000);background:color-mix(in srgb,var(--nn-accent,#6c9eff) 10%,#0000);border-color:#6c9eff;border-color:var(--nn-accent,#6c9eff);color:#6c9eff;color:var(--nn-accent,#6c9eff)}.editor-autosave-label{align-items:center;color:var(--nn-text-secondary);display:inline-flex;font-size:12px;gap:6px}.editor-autosave-dot{background:var(--nn-success);border-radius:50%;box-shadow:0 0 6px #22c55e80;height:8px;width:8px}.editor-toolbar-actions{display:flex;flex-shrink:0;gap:8px}.problem-side-chrome{display:flex;flex-direction:column;flex-shrink:0}.problem-side-chrome-row{align-items:center;background:var(--nn-bg-panel);border-bottom:1px solid var(--nn-border);display:flex;flex-shrink:0;justify-content:flex-end}.problem-side-chrome-row--tabs{min-height:var(--problem-editor-tabs-h);padding:0 10px}.problem-side-chrome-row--toolbar{min-height:var(--problem-editor-toolbar-h)}.problem-side-top-actions{align-items:center;display:flex;gap:10px;justify-content:flex-end;min-width:0}.problem-side-lang{position:relative}.problem-side-lang-btn{align-items:center;background:none;border:none;color:var(--nn-text-secondary);cursor:pointer;display:inline-flex;font-size:13px;font-weight:600;gap:5px;padding:4px 2px;transition:color .15s}.problem-side-lang-btn:hover{color:var(--nn-accent-soft)}.problem-side-lang-code{letter-spacing:.04em;text-transform:uppercase}.problem-side-lang-chevron{opacity:.75;transition:transform .15s ease}.problem-side-lang-chevron.is-open{transform:rotate(180deg)}.problem-side-lang-menu{background:var(--nn-bg-elevated);border:1px solid var(--nn-border);border-radius:var(--nn-radius-sm);box-shadow:0 8px 24px #00000059;min-width:72px;opacity:0;overflow:hidden;position:absolute;right:0;top:calc(100% + 4px);transform:translateY(-6px);transition:opacity .15s,visibility .15s,transform .15s;visibility:hidden;z-index:30}.problem-side-lang-menu.is-open{opacity:1;transform:translateY(0);visibility:visible}.problem-side-lang-option{background:none;border:none;color:var(--nn-text-secondary);cursor:pointer;display:block;font-size:13px;font-weight:600;padding:8px 12px;text-align:left;transition:background .15s,color .15s;width:100%}.problem-side-lang-option.is-active,.problem-side-lang-option:hover{background:var(--nn-accent-soft-08);color:var(--nn-accent-soft)}.problem-side-profile-link{align-items:center;color:var(--nn-text-secondary);display:inline-flex;gap:8px;max-width:140px;padding:4px 0;text-decoration:none;transition:color .15s}.problem-side-profile-link:hover{color:var(--nn-text-primary)}.problem-side-profile-avatar{border:1px solid var(--nn-border);border-radius:50%;flex-shrink:0;height:24px;object-fit:cover;width:24px}.problem-side-profile-name{font-size:12px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.problem-side-section{border-bottom:1px solid var(--nn-border);display:flex;flex:1 1;flex-direction:column;min-height:0;overflow:hidden}.problem-side-head{align-items:center;background:#0000;border:none;color:var(--nn-text-primary);cursor:pointer;display:flex;font-size:12px;font-weight:600;gap:8px;justify-content:space-between;padding:10px 12px;text-align:left;width:100%}.problem-side-head:hover{background:var(--nn-bg-hover)}.problem-side-head--static{cursor:default}.problem-side-head--static:hover{background:#0000}.problem-notes-input{background:var(--nn-bg-page);border:1px solid var(--nn-border);border-radius:var(--nn-radius-sm);color:var(--nn-text-primary);flex:1 1;font-family:inherit;font-size:12px;line-height:1.45;margin:0 12px 12px;min-height:88px;padding:10px;resize:vertical;width:calc(100% - 24px)}.problem-notes-input:focus{border-color:var(--nn-accent-soft);outline:none}.problem-content{display:contents}.problem-premium-blocked{align-items:center;background-color:var(--nn-bg-workspace);border-radius:8px;display:flex;flex:1 1;flex-direction:column;justify-content:center;padding:40px 20px;text-align:center}.problem-premium-blocked-icon{font-size:3rem;margin-bottom:16px}.problem-premium-blocked h2{color:var(--nn-text-primary);font-size:1.5rem;margin:0 0 12px}.problem-premium-blocked 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28px}.sub-trust-grid{grid-gap:24px;display:grid;gap:24px;grid-template-columns:repeat(4,minmax(0,1fr))}.sub-trust-item{text-align:center}.sub-trust-icon{align-items:center;color:var(--sub-teal-soft);display:inline-flex;font-size:18px;height:40px;justify-content:center;margin-bottom:12px;opacity:.85;width:40px}.sub-trust-title{color:var(--nn-text-strong);font-size:14px;font-weight:600;margin:0 0 8px}.sub-trust-desc{color:var(--nn-text-secondary);font-size:12px;line-height:1.55;margin:0}.subscription-modal-overlay{align-items:center;background:var(--nn-overlay);display:flex;inset:0;justify-content:center;padding:20px;position:fixed;z-index:1000}.subscription-modal{background:var(--nn-bg-card);border:1px solid var(--nn-border-subtle);border-radius:16px;box-shadow:var(--nn-shadow-modal);max-width:400px;padding:28px 24px;width:100%}.subscription-modal-title{color:var(--nn-text-strong);font-size:1.25rem;font-weight:700;margin:0 0 20px;text-align:center}.subscription-modal-plan{align-items:center;background:var(--nn-bg-panel);border:1px solid var(--nn-border-subtle);border-radius:10px;display:flex;gap:12px;justify-content:space-between;margin-bottom:20px;padding:16px}.subscription-modal-period{color:var(--nn-text-primary);font-size:.95rem;font-weight:600}.subscription-modal-price{color:var(--sub-teal-soft);font-size:1.1rem;font-weight:700;white-space:nowrap}.subscription-modal-error{color:var(--nn-error);font-size:.9rem;margin:0 0 12px}.subscription-modal-success{color:var(--nn-success);font-size:.95rem;font-weight:500;margin:0 0 12px}.subscription-modal-actions{display:flex;gap:12px;margin-top:20px}.subscription-modal-btn{border:1px solid #0000;border-radius:var(--nn-radius);cursor:pointer;flex:1 1;font-size:.95rem;font-weight:600;padding:12px 20px;transition:all .2s}.subscription-modal-btn:disabled{cursor:not-allowed;opacity:.7}.subscription-modal-btn-close{background:#0000;border-color:var(--nn-border-mid);color:var(--nn-text-secondary)}.subscription-modal-btn-close:hover:not(:disabled){background:var(--nn-bg-hover);color:var(--nn-text-strong)}.subscription-modal-btn-pay{background:linear-gradient(135deg,var(--nn-accent-deep) 0,var(--sub-teal-soft) 100%);border-color:#0000;color:var(--nn-text-on-accent)}.subscription-modal-btn-pay:hover:not(:disabled){filter:brightness(1.06)}@media (max-width:1100px){.sub-plans-grid,.sub-trust-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:768px){.sub-hero-grid{grid-template-columns:1fr;text-align:center}.sub-hero-subtitle{margin:0 auto}.sub-hero-visual{order:-1}.sub-hero-image{width:min(100%,260px)}.sub-billing-toggle{display:flex;margin:0 auto;max-width:360px;width:100%}.sub-billing-option{flex:1 1;font-size:13px;justify-content:center;padding:10px 12px}}@media (max-width:600px){.subscription-page{padding:16px 0 48px}.sub-plans-grid{grid-template-columns:1fr;margin:0 auto;max-width:360px}.sub-trust-card{padding:24px 18px}.sub-trust-grid{gap:20px;grid-template-columns:1fr}.sub-hero-title{font-size:1.5rem}}.dev-promo-page{background:var(--nn-bg-page);color:var(--nn-text-strong);font-family:var(--nn-font-sans);min-height:100vh;padding:32px 0 72px}.dev-promo-container{box-sizing:border-box;margin:0 auto;max-width:var(--nn-content-max);padding:0 16px;width:100%}.dev-promo-hero{margin-bottom:48px;max-width:720px}.dev-promo-badge{background:var(--nn-accent-12);border:1px solid var(--nn-border-teal);border-radius:999px;color:var(--nn-accent-soft);display:inline-block;font-size:12px;font-weight:600;letter-spacing:.04em;margin:0 0 16px;padding:6px 14px;text-transform:uppercase}.dev-promo-title{font-size:clamp(1.75rem,4vw,2.5rem);font-weight:700;letter-spacing:-.02em;line-height:1.15;margin:0 0 16px}.dev-promo-subtitle{color:var(--nn-text-muted);font-size:16px;line-height:1.65;margin:0;max-width:640px}.dev-promo-section{margin-bottom:48px}.dev-promo-section-title{font-size:1.35rem;font-weight:600;margin:0 0 24px}.dev-promo-steps{grid-gap:16px;display:grid;gap:16px;grid-template-columns:repeat(3,minmax(0,1fr))}.dev-promo-step{background:var(--nn-bg-card);border:1px solid var(--nn-border);border-radius:16px;box-shadow:var(--nn-shadow-panel);padding:24px}.dev-promo-step-icon{align-items:center;background:var(--nn-accent-12);border-radius:12px;color:var(--nn-accent-soft);display:inline-flex;font-size:18px;height:44px;justify-content:center;margin-bottom:16px;width:44px}.dev-promo-step h3{font-size:16px;font-weight:600;margin:0 0 10px}.dev-promo-step p{color:var(--nn-text-muted);font-size:14px;line-height:1.6;margin:0}.dev-promo-rewards{background:linear-gradient(135deg,var(--nn-bg-card) 0,var(--nn-accent-08) 100%);border:1px solid var(--nn-border-teal);border-radius:18px;padding:28px}.dev-promo-rewards-head{align-items:center;display:flex;gap:12px;margin-bottom:12px}.dev-promo-rewards-icon{align-items:center;background:var(--nn-premium-cta-20);border-radius:12px;color:var(--nn-accent-premium);display:inline-flex;font-size:18px;height:40px;justify-content:center;width:40px}.dev-promo-rewards-head .dev-promo-section-title{margin:0}.dev-promo-rewards-intro,.dev-promo-rewards-list{color:var(--nn-text-secondary);line-height:1.65;margin:0 0 16px}.dev-promo-rewards-list{padding-left:20px}.dev-promo-rewards-list li{margin-bottom:8px}.dev-promo-note{color:var(--nn-text-muted);font-size:13px;line-height:1.55;margin:0}.dev-promo-cta{display:flex;flex-wrap:wrap;gap:12px}.dev-promo-btn{align-items:center;border-radius:12px;display:inline-flex;font-size:14px;font-weight:600;justify-content:center;min-height:44px;padding:0 22px;text-decoration:none;transition:background .15s,color .15s,border-color .15s,transform .15s}.dev-promo-btn--primary{background:var(--nn-accent);border:1px solid #0000;color:var(--nn-text-on-accent)}.dev-promo-btn--primary:hover{filter:brightness(1.06);transform:translateY(-1px)}.dev-promo-btn--ghost{background:#0000;border:1px solid var(--nn-border-teal);color:var(--nn-accent-soft)}.dev-promo-btn--ghost:hover{background:var(--nn-accent-10)}@media (max-width:900px){.dev-promo-steps{grid-template-columns:1fr}}.checkout-page{--checkout-max:var(--nn-content-max);--checkout-teal:var(--nn-accent);--checkout-teal-soft:var(--nn-accent-soft);--checkout-gold:var(--nn-accent-premium);background:var(--nn-bg-page);color:var(--nn-text-primary);min-height:100vh;overflow:hidden;padding:24px 0 64px;position:relative}.checkout-layout{grid-gap:32px 40px;align-items:start;display:grid;gap:32px 40px;grid-template-columns:minmax(220px,.9fr) minmax(0,1.4fr) minmax(260px,.85fr);margin:0 auto;max-width:var(--checkout-max);position:relative;z-index:1}.checkout-sidebar--left{padding-top:8px}.checkout-back-link{align-items:center;color:var(--nn-text-secondary);display:inline-flex;font-size:13px;gap:6px;margin-bottom:28px;text-decoration:none;transition:color .2s}.checkout-back-link:hover{color:var(--checkout-teal-soft)}.checkout-hero-visual{display:flex;justify-content:center;margin-bottom:24px}.checkout-hero-image{filter:drop-shadow(0 0 40px var(--nn-accent-glow-strong));height:auto;width:min(100%,280px)}.checkout-hero-title{color:var(--nn-text-strong);font-size:clamp(1.35rem,2.2vw,1.85rem);font-weight:700;letter-spacing:.04em;line-height:1.15;margin:0 0 12px;text-transform:uppercase}.checkout-hero-subtitle{color:var(--nn-text-secondary);font-size:13px;line-height:1.65;margin:0 0 28px}.checkout-trust-blocks{display:flex;flex-direction:column;gap:20px;margin-bottom:28px}.checkout-trust-item{align-items:flex-start;display:flex;gap:14px}.checkout-trust-icon{align-items:center;background:var(--nn-bg-card);border:1px solid var(--nn-border-subtle);border-radius:10px;color:var(--checkout-teal-soft);display:flex;flex-shrink:0;font-size:16px;height:40px;justify-content:center;width:40px}.checkout-trust-icon--guarantee span{color:var(--checkout-gold);font-size:13px;font-weight:700}.checkout-trust-item h3{color:var(--nn-text-strong);font-size:13px;font-weight:600;margin:0 0 4px}.checkout-trust-item p{color:var(--nn-text-secondary);font-size:12px;line-height:1.55;margin:0}.checkout-payment-badges{color:var(--nn-text-muted);display:flex;flex-wrap:wrap;font-size:10px;font-weight:600;gap:10px 14px;letter-spacing:.04em;opacity:.7;text-transform:uppercase}.checkout-main{min-width:0}.checkout-form{background:var(--nn-bg-card);border:1px solid var(--nn-border-subtle);border-radius:16px;padding:28px 28px 32px}.checkout-form-header{align-items:center;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;margin-bottom:28px}.checkout-form-header h2{color:var(--nn-text-strong);font-size:1.25rem;font-weight:700;margin:0}.checkout-secure-badge{align-items:center;color:var(--nn-text-secondary);display:inline-flex;font-size:12px;gap:6px}.checkout-secure-badge svg{color:var(--checkout-teal-soft);font-size:11px}.checkout-step{border-bottom:1px solid var(--nn-border-subtle);margin-bottom:28px;padding-bottom:28px}.checkout-step:last-of-type{border-bottom:none;margin-bottom:0;padding-bottom:0}.checkout-step-title{align-items:center;color:var(--nn-text-strong);display:flex;font-size:14px;font-weight:600;gap:10px;margin:0 0 18px}.checkout-step-num{align-items:center;background:var(--nn-accent-08);border:1px solid var(--nn-accent-20);border-radius:50%;color:var(--checkout-teal-soft);display:inline-flex;font-size:12px;font-weight:700;height:24px;justify-content:center;width:24px}.checkout-plan-card{background:var(--nn-bg-panel);border:1px solid var(--nn-border-subtle);border-radius:12px;margin-bottom:16px;padding:18px;position:relative}.checkout-plan-card-head{align-items:center;display:flex;gap:14px;margin-bottom:14px}.checkout-plan-icon{color:var(--checkout-teal-soft);flex-shrink:0;height:40px;width:40px}.checkout-plan-name{color:var(--nn-text-strong);display:block;font-size:15px;font-weight:700}.checkout-plan-price{color:var(--checkout-teal-soft);display:block;font-size:14px;font-weight:600}.checkout-plan-features{display:flex;flex-direction:column;gap:8px;list-style:none;margin:0;padding:0}.checkout-plan-features li{align-items:flex-start;color:var(--nn-text-secondary);display:flex;font-size:12px;gap:8px;line-height:1.45}.checkout-plan-features svg{color:var(--checkout-teal-soft);flex-shrink:0;font-size:10px;margin-top:2px}.checkout-plan-period-badge{color:var(--nn-text-muted);font-size:11px;position:absolute;right:14px;top:14px}.checkout-field{margin-bottom:14px}.checkout-field label{align-items:center;color:var(--nn-text-secondary);display:flex;font-size:12px;font-weight:500;gap:6px;margin-bottom:6px}.checkout-field input,.checkout-field select{background:var(--nn-bg-page);border:1px solid var(--nn-border-subtle);border-radius:var(--nn-radius);color:var(--nn-text-primary);font-size:14px;padding:11px 14px;transition:border-color .2s,box-shadow .2s;width:100%}.checkout-field input::placeholder{color:var(--nn-text-muted)}.checkout-field input:focus,.checkout-field select:focus{border-color:var(--checkout-teal);box-shadow:0 0 0 3px var(--nn-accent-08);outline:none}.checkout-field-row{grid-gap:14px;display:grid;gap:14px;grid-template-columns:1fr 1fr}.checkout-change-plan{color:var(--checkout-teal-soft);display:inline-block;font-size:12px;margin-top:4px;text-decoration:none}.checkout-change-plan:hover{text-decoration:underline}.checkout-payment-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}.checkout-payment-tab{background:var(--nn-bg-page);border:1px solid var(--nn-border-subtle);border-radius:var(--nn-radius);color:var(--nn-text-secondary);cursor:pointer;flex:1 1;font-size:13px;font-weight:500;min-width:100px;padding:10px 14px;transition:all .2s}.checkout-payment-tab:hover{border-color:var(--nn-border-mid);color:var(--nn-text-primary)}.checkout-payment-tab--active{background:var(--nn-accent-08);border-color:var(--checkout-teal);color:var(--checkout-teal-soft)}.checkout-card-input-wrap{position:relative}.checkout-card-input-wrap input{padding-right:80px}.checkout-card-brands{color:var(--nn-text-muted);font-size:10px;font-weight:700;letter-spacing:.05em;position:absolute;right:12px;top:50%;transform:translateY(-50%)}.checkout-cvc-hint{color:var(--nn-text-muted);cursor:help;font-size:11px}.checkout-alt-method-note{background:var(--nn-bg-panel);border:1px solid var(--nn-border-subtle);border-radius:var(--nn-radius);color:var(--nn-text-secondary);font-size:13px;line-height:1.55;margin:0 0 16px;padding:14px}.checkout-promo-row{display:flex;gap:8px}.checkout-promo-row input{flex:1 1;min-width:0}.checkout-promo-btn{background:#0000;border:1px solid var(--nn-border-mid);border-radius:var(--nn-radius);color:var(--nn-text-secondary);cursor:pointer;flex-shrink:0;font-size:13px;font-weight:500;padding:0 16px;transition:all .2s}.checkout-promo-btn:hover{border-color:var(--checkout-teal);color:var(--checkout-teal-soft)}.checkout-field-error{color:var(--nn-error);font-size:12px;margin:6px 0 0}.checkout-field-success{color:var(--nn-success);font-size:12px;margin:6px 0 0}.checkout-form-error{color:var(--nn-error);font-size:13px;margin:16px 0 0}.checkout-form-success{color:var(--nn-success);font-size:13px;font-weight:500;margin:16px 0 0}.checkout-sidebar--right{position:static}.checkout-order{background:var(--nn-bg-card);border:1px solid var(--nn-border-subtle);border-radius:16px;padding:24px 22px}.checkout-order-title{color:var(--nn-text-strong);font-size:1.1rem;font-weight:700;margin:0 0 20px}.checkout-order-plan{background:var(--nn-bg-panel);border:1px solid var(--nn-border-subtle);border-radius:12px;margin-bottom:20px;padding:16px}.checkout-order-plan-head{align-items:center;display:flex;gap:12px;margin-bottom:8px}.checkout-order-icon{color:var(--checkout-teal-soft);flex-shrink:0;height:36px;width:36px}.checkout-order-plan-name{color:var(--nn-text-strong);display:block;font-size:14px;font-weight:700}.checkout-order-plan-price{color:var(--checkout-teal-soft);display:block;font-size:13px;font-weight:600}.checkout-order-period{color:var(--nn-text-muted);font-size:12px;margin:0}.checkout-order-breakdown{margin:0 0 16px}.checkout-order-row{align-items:baseline;display:flex;font-size:13px;gap:12px;justify-content:space-between;padding:8px 0}.checkout-order-row dt{color:var(--nn-text-secondary)}.checkout-order-row dd{color:var(--nn-text-primary);font-weight:500;margin:0;text-align:right}.checkout-order-discount{color:var(--nn-success)}.checkout-order-row--total{border-top:1px solid var(--nn-border-subtle);margin-top:4px;padding-top:14px}.checkout-order-row--total dt{color:var(--nn-text-strong);font-size:14px;font-weight:600}.checkout-order-row--total dd{color:var(--nn-text-strong);font-size:1.25rem;font-weight:700}.checkout-order-vat{color:var(--nn-text-muted);display:block;font-size:11px;font-weight:400}.checkout-savings-alert{background:#d7a84a14;border:1px solid #d7a84a59;border-radius:var(--nn-radius);color:var(--checkout-gold);font-size:12px;line-height:1.5;margin-bottom:18px;padding:12px 14px}.checkout-order-promo{margin-bottom:16px}.checkout-order-promo label{color:var(--nn-text-secondary);display:block;font-size:12px;font-weight:500;margin-bottom:6px}.checkout-order-promo .checkout-promo-row input{background:var(--nn-bg-page);border:1px solid var(--nn-border-subtle);border-radius:var(--nn-radius);color:var(--nn-text-primary);flex:1 1;font-size:13px;min-width:0;padding:10px 12px}.checkout-order-promo .checkout-promo-row input:focus{border-color:var(--checkout-teal);box-shadow:0 0 0 3px var(--nn-accent-08);outline:none}.checkout-order-promo .checkout-field-error,.checkout-order-promo .checkout-field-success{margin-top:6px}.checkout-submit-btn{background:linear-gradient(135deg,var(--nn-accent-deep) 0,var(--checkout-teal-soft) 100%);border:none;border-radius:var(--nn-radius);color:var(--nn-text-on-accent);cursor:pointer;font-size:15px;font-weight:700;margin-bottom:14px;padding:14px 20px;transition:filter .2s;width:100%}.checkout-submit-btn:hover:not(:disabled){filter:brightness(1.06)}.checkout-submit-btn:disabled{cursor:not-allowed;opacity:.7}.checkout-page--exclusive .checkout-plan-card{border-color:var(--nn-border-exclusive);box-shadow:var(--nn-shadow-exclusive)}.checkout-page--exclusive .checkout-order-icon,.checkout-page--exclusive .checkout-plan-icon,.checkout-page--exclusive .checkout-plan-price{color:var(--nn-accent-exclusive-soft)}.checkout-faunder-count{color:var(--nn-text-strong);font-size:13px;font-weight:600;margin:0 0 14px}.checkout-legal{color:var(--nn-text-muted);font-size:11px;line-height:1.55;margin:0 0 18px;text-align:center}.checkout-legal a{color:var(--checkout-teal-soft);text-decoration:none}.checkout-legal a:hover{text-decoration:underline}.checkout-cancel-info{align-items:flex-start;background:var(--nn-bg-panel);border:1px solid var(--nn-border-subtle);border-radius:var(--nn-radius);display:flex;gap:10px;padding:14px}.checkout-cancel-info svg{color:var(--checkout-teal-soft);flex-shrink:0;font-size:12px;margin-top:2px}.checkout-cancel-info p{color:var(--nn-text-secondary);font-size:12px;line-height:1.55;margin:0}@media (max-width:1200px){.checkout-layout{grid-template-columns:1fr 1fr}.checkout-sidebar--left{grid-gap:0 32px;align-items:start;display:grid;gap:0 32px;grid-column:1/-1;grid-template-columns:auto 1fr}.checkout-back-link{grid-column:1/-1}.checkout-hero-visual{margin-bottom:0}.checkout-hero-subtitle,.checkout-hero-title{grid-column:2}.checkout-payment-badges,.checkout-trust-blocks{grid-column:1/-1}.checkout-sidebar--right{position:static}}@media (max-width:768px){.checkout-page{padding:16px 0 48px}.checkout-layout{gap:24px;grid-template-columns:1fr}.checkout-sidebar--left{display:block}.checkout-form{padding:20px 18px 24px}.checkout-field-row{grid-template-columns:1fr}.checkout-payment-tabs{flex-direction:column}.checkout-payment-tab{flex:none}}.ach-page{--ach-side-col:minmax(260px,320px);background:var(--nn-bg-page);color:var(--nn-text-primary);font-family:var(--nn-font-sans);min-height:100vh;padding:8px 0 48px}.ach-inner{box-sizing:border-box;margin:0 auto;max-width:var(--nn-content-max);padding:0;width:100%}.ach-state{color:var(--nn-text-secondary);padding:64px 16px;text-align:center}.ach-state--error{color:var(--nn-error)}.ach-hero{margin-bottom:28px}.ach-hero__title{font-size:clamp(1.75rem,3.2vw,2.35rem);font-weight:700;letter-spacing:-.02em;line-height:1.15;margin:0 0 12px;text-transform:uppercase}.ach-hero__lead,.ach-hero__title{color:var(--nn-text-strong)}.ach-hero__accent{color:var(--nn-accent-soft)}.ach-hero__user{color:var(--nn-text-secondary);font-size:.72em;font-weight:600;text-transform:none}.ach-hero__subtitle{color:var(--nn-text-secondary);font-size:15px;line-height:1.55;margin:0;max-width:560px}.ach-stats{grid-gap:12px;align-items:stretch;display:grid;gap:12px;grid-template-columns:repeat(4,minmax(0,1fr)) var(--ach-side-col);margin-bottom:20px}.ach-stat-card{align-items:center;background:var(--nn-bg-card);border:1px solid var(--nn-border);border-radius:12px;box-sizing:border-box;display:flex;gap:10px;min-height:0;min-width:0;padding:12px}.ach-stat-card__icon{align-items:center;background:var(--nn-accent-soft-10);border-radius:50%;color:var(--nn-accent-soft);display:inline-flex;flex-shrink:0;font-size:15px;height:36px;justify-content:center;width:36px}.ach-stat-card__icon--gold{background:var(--nn-premium-cta-20);color:var(--nn-accent-premium)}.ach-stat-card__body{display:flex;flex-direction:column;gap:1px;min-width:0}.ach-stat-card__title{color:var(--nn-text-muted);font-size:11px;font-weight:500;line-height:1.3}.ach-stat-card__value{color:var(--nn-text-strong);font-size:1.2rem;font-weight:700;line-height:1.15}.ach-stat-card__label{color:var(--nn-text-secondary);font-size:11px;line-height:1.3}.ach-stat-card__meta{font-feature-settings:"tnum";color:var(--nn-text-strong);font-size:1.05rem;font-variant-numeric:tabular-nums;font-weight:700;line-height:1.2;margin-top:2px}.ach-stat-card--progress{gap:10px}.ach-ring{flex-shrink:0;position:relative}.ach-ring,.ach-ring 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14px}.ach-goal-card__top{align-items:center;display:flex;gap:12px;min-width:0}.ach-goal-card__head{display:flex;flex-direction:column;gap:2px;min-width:0}.ach-goal-card__title{color:var(--nn-text-strong);font-size:14px;font-weight:600;line-height:1.25;margin:0}.ach-goal-card__name{color:var(--nn-text-secondary);font-size:12px;line-height:1.35;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ach-goal-card__footer{align-items:center;display:flex;gap:8px;justify-content:space-between}.ach-goal-card__progress{font-feature-settings:"tnum";color:var(--nn-text-secondary);font-size:12px;font-variant-numeric:tabular-nums;font-weight:600}.ach-goal-card__xp{color:var(--nn-accent-soft);font-size:12px;font-weight:700}.ach-goal-card__bar{background:#ffffff0f;border-radius:999px;height:4px;overflow:hidden}.ach-goal-card__fill{background:linear-gradient(90deg,var(--nn-accent-deep),var(--nn-accent-soft));border-radius:inherit;height:100%;transition:width .3s 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