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var(--space-8)}.landing-container{background:linear-gradient(135deg,var(--bg-primary) 0,var(--bg-secondary) 100%);display:flex;flex-direction:column;min-height:100vh;padding:var(--space-8) var(--space-4);width:100%}.landing-header{animation:slideIn .6s ease-out;margin-bottom:var(--space-12);text-align:center}.landing-title{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,var(--primary) 0,var(--secondary) 100%);-webkit-background-clip:text;background-clip:text;font-size:var(--text-3xl);font-weight:var(--font-weight-700);margin-bottom:var(--space-4)}.landing-subtitle{color:var(--text-secondary);font-size:var(--text-lg);line-height:1.8;margin:0 auto;max-width:600px}.topic-selector-wrapper{display:flex;flex:1 1;flex-direction:column;margin:0 auto;max-width:1000px;width:100%}.selector-section{animation:fadeIn .5s ease-out 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100%);border-radius:2px;content:"";height:24px;width:4px}.section-count{color:var(--text-tertiary);font-size:var(--text-sm);margin-left:auto}.subject-selector-container{position:relative}.subject-label{color:var(--text-secondary);display:block;font-size:var(--text-sm);font-weight:var(--font-weight-600);letter-spacing:.5px;margin-bottom:var(--space-3);text-transform:uppercase}.subject-dropdown{-webkit-appearance:none;appearance:none;background-color:var(--surface);background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' fill='none' stroke='%2360a5fa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 4 4 4-4'/%3E%3C/svg%3E");background-position:right var(--space-4) center;background-repeat:no-repeat;border:2px solid var(--border);border-radius:var(--radius-lg);color:var(--text-primary);cursor:pointer;font-size:var(--text-base);padding:var(--space-4) 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var(--transition-normal)}.topic-card:hover{background-color:var(--surface-hover);border-color:var(--primary);box-shadow:var(--shadow-lg);transform:translateY(-4px)}.topic-card:hover:before{transform:scaleX(1)}.topic-card.selected{background:linear-gradient(135deg,#60a5fa1a,#06b6d40d);border-color:var(--primary);box-shadow:inset 0 0 0 1px var(--primary),var(--shadow-md)}.topic-card.selected:after{align-items:center;background-color:var(--primary);border-radius:50%;color:var(--bg-primary);content:"✓";display:flex;font-size:var(--text-sm);font-weight:700;height:24px;justify-content:center;position:absolute;right:var(--space-4);top:var(--space-4);width:24px}.topic-card-title{color:var(--text-primary);font-size:var(--text-base);font-weight:var(--font-weight-600);margin-bottom:var(--space-2)}.topic-card-count{color:var(--text-tertiary);font-size:var(--text-sm)}.topic-checkbox{display:none}.concepts-filter-container{grid-gap:var(--space-4);background-color:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);display:grid;gap:var(--space-4);grid-template-columns:repeat(auto-fill,minmax(160px,1fr));padding:var(--space-6)}.concept-item{align-items:center;background-color:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-md);cursor:pointer;display:flex;gap:var(--space-3);padding:var(--space-3) var(--space-4);transition:all var(--transition-fast);-webkit-user-select:none;user-select:none}.concept-item:hover{background-color:var(--surface-hover);border-color:var(--primary)}.concept-item input[type=checkbox]:checked{background-color:var(--primary);border-color:var(--primary)}.concept-item input[type=checkbox]:checked~.concept-label{color:var(--primary);font-weight:var(--font-weight-600)}.concept-label{color:var(--text-secondary);cursor:pointer;flex:1 1;font-size:var(--text-sm);transition:color var(--transition-fast)}.question-count-container{align-items:center;background-color:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);display:flex;gap:var(--space-6);padding:var(--space-6)}.question-count-input{text-align:center;width:80px}.question-count-input::-webkit-inner-spin-button,.question-count-input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.question-count-input[type=number]{-moz-appearance:textfield}.question-count-label{color:var(--text-secondary);font-size:var(--text-sm);font-weight:var(--font-weight-600)}.question-count-info{color:var(--text-tertiary);font-size:var(--text-sm);margin-left:auto}.mode-cards-container{grid-gap:var(--space-6);display:grid;gap:var(--space-6);grid-template-columns:repeat(auto-fit,minmax(240px,1fr));margin-bottom:var(--space-8)}.mode-card{align-items:center;background-color:var(--surface);border:2px solid var(--border);border-radius:var(--radius-xl);cursor:pointer;display:flex;flex-direction:column;gap:var(--space-4);overflow:hidden;padding:var(--space-8);position:relative;text-align:center;transition:all var(--transition-normal)}.mode-card:before{background:linear-gradient(135deg,#60a5fa1a,#06b6d40d);bottom:0;content:"";left:0;opacity:0;pointer-events:none;position:absolute;right:0;top:0;transition:opacity var(--transition-normal)}.mode-card:hover{background-color:var(--surface-hover);border-color:var(--primary);box-shadow:var(--shadow-lg);transform:translateY(-4px)}.mode-card:hover:before{opacity:1}.mode-card.selected{background:linear-gradient(135deg,#60a5fa1a,#06b6d40d);border-color:var(--primary);box-shadow:inset 0 0 0 1px var(--primary),var(--shadow-lg)}.mode-icon{font-size:2.5rem;margin-bottom:var(--space-2)}.mode-title{color:var(--text-primary);font-size:var(--text-lg);font-weight:var(--font-weight-700)}.mode-description{color:var(--text-secondary);font-size:var(--text-sm);line-height:1.6}.mode-radio{cursor:pointer;position:absolute;right:var(--space-4);top:var(--space-4)}.start-session-btn-container{display:flex;gap:var(--space-4);justify-content:center;margin-top:var(--space-10)}.start-session-btn{background:linear-gradient(135deg,var(--primary) 0,var(--secondary) 100%);border:none;border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);color:var(--bg-primary);cursor:pointer;font-size:var(--text-lg);font-weight:var(--font-weight-700);overflow:hidden;padding:var(--space-4) var(--space-10);position:relative;transition:all var(--transition-normal)}.start-session-btn:before{background:linear-gradient(90deg,#0000,#fff3,#0000);content:"";height:100%;left:-100%;position:absolute;top:0;transition:left var(--transition-normal);width:100%}.start-session-btn:hover:not(:disabled){box-shadow:var(--shadow-2xl);transform:translateY(-2px)}.start-session-btn:hover:not(:disabled):before{left:100%}.start-session-btn:active:not(:disabled){transform:translateY(0)}.start-session-btn:disabled{cursor:not-allowed;opacity:.5}@media (max-width:768px){.landing-container{padding:var(--space-6) var(--space-4)}.landing-title{font-size:var(--text-2xl)}.landing-subtitle{font-size:var(--text-base)}.topics-grid{gap:var(--space-3);grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}.topic-card{padding:var(--space-4)}.concepts-filter-container{gap:var(--space-3);grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}.mode-cards-container{grid-template-columns:1fr}.question-count-container{align-items:flex-start;flex-direction:column}.question-count-info{margin-left:0}.start-session-btn{width:100%}}@media (max-width:480px){.landing-container{padding:var(--space-4)}.landing-title{font-size:var(--text-xl);margin-bottom:var(--space-3)}.landing-header{margin-bottom:var(--space-8)}.section-title{font-size:var(--text-base)}.topics-grid{grid-template-columns:repeat(2,1fr)}.topic-card{padding:var(--space-3)}.topic-card-title{font-size:var(--text-sm)}.mode-card{padding:var(--space-6)}.mode-icon{font-size:2rem}.mode-title{font-size:var(--text-base)}button{font-size:var(--text-sm);padding:var(--space-3) var(--space-4)}}.session-interface{background:linear-gradient(135deg,var(--bg-primary) 0,var(--bg-secondary) 100%);display:flex;flex-direction:column;min-height:100vh;padding:var(--space-8) var(--space-4);width:100%}.session-container{display:flex;flex:1 1;flex-direction:column;margin:0 auto;max-width:900px;width:100%}.session-header{align-items:center;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;margin-bottom:var(--space-8);padding-bottom:var(--space-4)}.session-title{-webkit-text-fill-color:#0000;background:linear-gradient(135deg,var(--primary) 0,var(--secondary) 100%);-webkit-background-clip:text;background-clip:text;font-size:var(--text-2xl);font-weight:var(--font-weight-700)}.session-progress{align-items:center;display:flex;gap:var(--space-4)}.progress-info{text-align:right}.progress-count{color:var(--text-secondary);font-size:var(--text-sm);font-weight:var(--font-weight-600)}.progress-bar{background-color:var(--border);border-radius:2px;height:4px;overflow:hidden;width:120px}.progress-fill{background:linear-gradient(90deg,var(--primary) 0,var(--secondary) 100%);height:100%;transition:width var(--transition-normal)}.question-card{animation:slideIn .4s ease-out;background-color:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);margin-bottom:var(--space-8);padding:var(--space-8)}.question-header{align-items:flex-start;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;margin-bottom:var(--space-6);padding-bottom:var(--space-4)}.question-meta{display:flex;flex-direction:column;gap:var(--space-2)}.question-topic{color:var(--text-tertiary);font-size:var(--text-sm);font-weight:var(--font-weight-600);letter-spacing:.5px;text-transform:uppercase}.question-concept{color:var(--text-secondary);font-size:var(--text-sm)}.question-number{background-color:var(--primary);border-radius:var(--radius-sm);color:var(--bg-primary);font-size:var(--text-xs);padding:var(--space-1) var(--space-3)}.question-number,.question-text{font-weight:var(--font-weight-600)}.question-text{color:var(--text-primary);font-size:var(--text-xl);line-height:1.8;margin-bottom:var(--space-8)}.hints-section{background-color:#60a5fa0d;border:1px solid #60a5fa33;border-radius:var(--radius-lg);margin:var(--space-6) 0;padding:var(--space-6)}.hints-toggle-btn{align-items:center;background-color:initial;border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-primary);cursor:pointer;display:flex;font-size:var(--text-base);font-weight:var(--font-weight-600);justify-content:space-between;margin-bottom:var(--space-4);padding:var(--space-4) var(--space-6);transition:all var(--transition-fast);width:100%}.hints-toggle-btn:hover{background-color:var(--surface-hover);border-color:var(--primary)}.hints-toggle-icon{display:inline-block;font-size:var(--text-lg);transition:transform var(--transition-normal)}.hints-toggle-btn[aria-expanded=true] .hints-toggle-icon{transform:rotate(180deg)}.hints-list{grid-gap:var(--space-4);animation:fadeIn .3s ease-out;display:grid;gap:var(--space-4)}.hint-item{background-color:var(--surface);border-left:3px solid var(--primary);border-radius:var(--radius-md);color:var(--text-secondary);font-size:var(--text-sm);line-height:1.7;padding:var(--space-4)}.hint-item:before{content:"💡";margin-right:var(--space-2)}.flashcard-container{perspective:1000px}.flashcard{align-items:center;background:linear-gradient(135deg,#60a5fa1a,#06b6d40d);border:2px dashed var(--border);border-radius:var(--radius-xl);cursor:pointer;display:flex;justify-content:center;min-height:200px;overflow:hidden;padding:var(--space-8);position:relative;text-align:center;transition:all var(--transition-normal)}.flashcard:before{background:linear-gradient(90deg,#0000,#ffffff1a,#0000);content:"";height:100%;left:-100%;position:absolute;top:0;transition:left 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var(--space-4);width:100%}.chat-messages::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar-track{background:#0000}.chat-messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.chat-empty-state{align-items:center;animation:fadeIn .5s ease-out;display:flex;flex:1 1;flex-direction:column;justify-content:center;padding:var(--space-12) var(--space-4);text-align:center}.chat-empty-icon{font-size:4rem;margin-bottom:var(--space-4);opacity:.6}.chat-empty-title{color:var(--text-secondary);font-size:var(--text-xl);font-weight:var(--font-weight-600);margin:0 0 var(--space-2)}.chat-empty-subtitle{color:var(--text-tertiary);font-size:var(--text-sm);margin:0}.chat-message{animation:slideIn .2s ease-out;display:flex;gap:var(--space-3)}.chat-message--user{flex-direction:row-reverse}.chat-message-avatar{align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:50%;display:flex;flex-shrink:0;font-size:1.4rem;height:2.25rem;justify-content:center;margin-top:2px;width:2.25rem}.chat-message-bubble{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);max-width:72%;padding:var(--space-3) var(--space-4)}.chat-message--user .chat-message-bubble{background:linear-gradient(135deg,var(--primary-dark) 0,#2563eb 100%);border-color:#0000}.chat-message-bubble--error{background:#ef44441a;border-color:var(--danger)}.chat-message-role{color:var(--text-tertiary);display:block;font-size:var(--text-xs);font-weight:var(--font-weight-600);letter-spacing:.05em;margin-bottom:var(--space-1);text-transform:uppercase}.chat-message--user .chat-message-role{color:#f1f5f9b3;text-align:right}.chat-message-content{color:var(--text-primary);font-size:var(--text-base);line-height:1.7;margin:0;white-space:pre-wrap;word-break:break-word}.chat-cursor{animation:blink .8s step-end infinite;background:var(--primary);display:inline-block;height:1.1em;margin-left:2px;vertical-align:text-bottom;width:2px}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}.chat-input-area{align-items:flex-end;background:var(--surface);border-top:1px solid var(--border);box-shadow:0 -4px 12px #00000026;box-sizing:border-box;display:flex;flex-shrink:0;gap:var(--space-3);margin:0 auto;max-width:860px;padding:var(--space-4) var(--space-6);width:100%}.chat-container>.chat-input-area{max-width:100%}.chat-input{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);color:var(--text-primary);flex:1 1;font-family:var(--font-family-base);font-size:var(--text-base);line-height:1.6;max-height:160px;outline:none;overflow-y:auto;padding:var(--space-3) var(--space-4);resize:none;transition:border-color var(--transition-fast)}.chat-input::placeholder{color:var(--text-tertiary)}.chat-input:focus{border-color:var(--primary);box-shadow:0 0 0 2px #60a5fa33}.chat-input:disabled{cursor:not-allowed;opacity:.6}.chat-send-btn{align-self:flex-end;background:linear-gradient(135deg,var(--primary-dark) 0,#2563eb 100%);border:none;border-radius:var(--radius-lg);color:#fff;cursor:pointer;flex-shrink:0;font-size:var(--text-sm);font-weight:var(--font-weight-600);padding:var(--space-3) var(--space-6);transition:all var(--transition-fast);white-space:nowrap}.chat-send-btn:hover:not(:disabled){box-shadow:0 4px 12px #3b82f666;transform:translateY(-1px)}.chat-send-btn:disabled{cursor:not-allowed;opacity:.45;transform:none}.chat-send-btn--stop{background:linear-gradient(135deg,var(--danger) 0,#dc2626 100%)}.chat-send-btn--stop:hover{box-shadow:0 4px 12px #ef444466}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.nano-root{--n-bg:#0b0d14;--n-surface:hsla(0,0%,100%,.045);--n-surface-2:#ffffff08;--n-surface-3:#ffffff12;--n-border:#ffffff1a;--n-border-2:#ffffff29;--n-float:#12141d;--n-primary:var(--mx,#818cf8);--n-primary-600:color-mix(in srgb,var(--mx,#818cf8) 88%,#000);--n-primary-700:color-mix(in srgb,var(--mx,#818cf8) 76%,#000);--n-primary-soft:color-mix(in srgb,var(--mx,#818cf8) 16%,#0000);--n-primary-line:color-mix(in srgb,var(--mx,#818cf8) 40%,#0000);--n-primary-ink:color-mix(in srgb,var(--mx,#818cf8) 65%,#fff);--n-text:#eaecf7;--n-text-2:#a3aac6;--n-text-3:#6b7189;--n-dsa:#818cf8;--n-mcq:#fbbf24;--n-theory:#38bdf8;--n-flash:#c084fc;--n-interview:#f87171;--n-ok:#34d399;--n-ok-soft:#34d3991f;--n-ok-line:#34d39959;--n-ok-ink:#6ee7b7;--n-err:#f87171;--n-err-soft:#f871711f;--n-err-line:#f8717159;--n-err-ink:#fca5a5;--n-warn:#fbbf24;--n-warn-soft:#fbbf241f;--n-warn-line:#fbbf2459;--n-warn-ink:#fcd34d;--n-info:#60a5fa;--n-info-soft:#60a5fa24;--n-info-line:#60a5fa59;--n-violet:#c084fc;--n-violet-soft:#c084fc24;--n-violet-ink:#d8b4fe;--n-cyan:#38bdf8;--n-cyan-soft:#38bdf824;--n-cyan-ink:#7dd3fc;--n-radius:14px;--n-radius-sm:10px;--n-radius-lg:20px;--n-shadow-sm:0 1px 2px #0006;--n-shadow:0 8px 24px #00000059;--n-shadow-lg:0 24px 60px #00000061;background:var(--n-bg);color:var(--n-text);display:flex;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Inter,Roboto,sans-serif;height:100vh;overflow:hidden;padding:14px;position:relative;transition:--mx .6s ease;width:100%}.nano-root,.nano-root *,.nano-root :after,.nano-root :before{box-sizing:border-box}.nano-root button{white-space:normal}:root{color-scheme:dark}.nano-root,.nano-root *{scrollbar-color:var(--n-border-2) #0000;scrollbar-width:thin}.nano-root ::-webkit-scrollbar{height:9px;width:9px}.nano-root ::-webkit-scrollbar-corner,.nano-root ::-webkit-scrollbar-track{background:#0000}.nano-root ::-webkit-scrollbar-thumb{background:var(--n-border-2);background-clip:padding-box;border:2px solid #0000;border-radius:8px}.nano-root ::-webkit-scrollbar-thumb:hover{background:var(--n-text-3);background-clip:padding-box}.nano-shell{border-radius:var(--n-radius-lg);box-shadow:var(--n-shadow-lg);flex:1 1;min-width:0;overflow:hidden}.nano-shell,.nano-sidebar{background:var(--n-surface);display:flex}.nano-sidebar{border-right:1px solid var(--n-border);flex-direction:column;flex-shrink:0;gap:6px;overflow-y:auto;padding:20px 16px;transition:width .18s ease,padding .18s ease;width:252px}.nano-side-ctx{display:flex;flex-direction:column;gap:10px;margin-bottom:4px}.nano-sidebar .nano-ctx-card{padding:12px}.nano-sidebar .nano-progress{gap:12px}.nano-side-head{gap:4px;padding-bottom:12px}.nano-brand,.nano-side-head{align-items:center;display:flex}.nano-brand{background:none;border:none;cursor:pointer;flex:1 1;gap:10px;min-width:0;padding:4px 6px;text-align:left}.nano-brand-name{overflow:hidden;white-space:nowrap}.nano-side-toggle{background:var(--n-surface-2);border:1px solid var(--n-border);border-radius:10px;color:var(--n-text-2);cursor:pointer;display:grid;flex-shrink:0;height:32px;padding:0;place-items:center;transition:background .15s,color .15s,border-color .15s;width:32px}.nano-side-toggle:hover{background:var(--n-surface-3);border-color:var(--n-border-2);color:var(--n-text)}.nano-side-toggle:focus-visible{outline:2px solid var(--n-primary-line);outline-offset:2px}.nano-brand:hover .nano-brand-name{color:var(--n-primary-ink)}.nano-brand-logo{background:#818cf8;background:var(--mx,#818cf8);border-radius:9px;box-shadow:0 4px 10px color-mix(in srgb,#818cf8 35%,#0000);box-shadow:0 4px 10px color-mix(in srgb,var(--mx,#818cf8) 35%,#0000);display:grid;flex-shrink:0;height:30px;place-items:center;width:30px}.nano-brand-name{font-size:17px;font-weight:700;letter-spacing:-.02em}.nano-nav-label{color:var(--n-text-3);font-size:11px;font-weight:600;letter-spacing:.06em;padding:14px 8px 6px;text-transform:uppercase}.nano-nav-item{align-items:center;background:none;border:none;border-radius:var(--n-radius-sm);color:var(--n-text-2);cursor:pointer;display:flex;font-size:14px;font-weight:500;gap:11px;padding:9px 10px;text-align:left;transition:background .15s,color .15s;width:100%}.nano-nav-item:hover{background:var(--n-surface-3);color:var(--n-text)}.nano-nav-item.active{background:var(--n-primary-soft);color:var(--n-primary-ink);font-weight:600}.nano-nav-item .n-ico{flex-shrink:0;opacity:.9}.nano-today-item{gap:9px}.nano-today-dot{border-radius:7px;display:grid;flex-shrink:0;height:22px;place-items:center;width:22px}.nano-pro{background:linear-gradient(160deg,var(--n-surface-2),var(--n-primary-soft));border:1px solid var(--n-primary-line);border-radius:var(--n-radius);margin-top:auto;padding:14px;text-align:left}.nano-pro-title{align-items:center;display:flex;font-size:14px;font-weight:700;gap:7px}.nano-pro-sub{color:var(--n-text-2);font-size:12px;line-height:1.4;margin:6px 0 12px}.nano-pro-btn{background:var(--n-surface);border:none;border-radius:9px;box-shadow:var(--n-shadow-sm);color:var(--n-primary-ink);cursor:pointer;font-size:13px;font-weight:600;padding:9px;width:100%}.nano-pro-btn:hover{background:var(--n-surface);box-shadow:var(--n-shadow)}.nano-user{align-items:center;border-top:1px solid var(--n-border);display:flex;gap:10px;margin-top:10px;padding:12px 8px 2px}.nano-user-av{background:linear-gradient(135deg,var(--n-primary),var(--n-violet));border-radius:50%;color:#fff;display:grid;flex-shrink:0;height:34px;object-fit:cover;place-items:center;width:34px}.nano-user-av,.nano-user-name{font-size:13px;font-weight:600}.nano-user-mail{color:var(--n-text-3);font-size:11px}.nano-sidebar.is-rail{align-items:center;padding:20px 10px;width:68px}.nano-sidebar.is-rail .nano-side-head{align-items:center;flex-direction:column;gap:10px;padding-bottom:12px;width:100%}.nano-sidebar.is-rail .nano-side-toggle{background:var(--n-surface-3);border-radius:11px;color:var(--n-text-2);height:34px;width:34px}.nano-sidebar.is-rail .nano-side-toggle:hover{background:var(--n-primary-soft);border-color:var(--n-primary-line);color:var(--n-primary-ink)}.nano-sidebar.is-rail .nano-brand{flex:none;justify-content:center;padding:0}.nano-sidebar.is-rail .nano-brand-name,.nano-sidebar.is-rail .nano-nav-txt,.nano-sidebar.is-rail .nano-user-meta{display:none}.nano-sidebar.is-rail .nano-nav-item{gap:0;justify-content:center;padding:10px 0;width:44px}.nano-sidebar.is-rail .nano-nav-label{background:var(--n-border);font-size:0;height:1px;line-height:0;margin:12px auto 6px;overflow:hidden;padding:0;width:24px}.nano-sidebar.is-rail .nano-user{gap:0;justify-content:center;margin-top:auto;padding:12px 0 2px;width:100%}.nano-sidebar.is-rail .nano-user-menu{bottom:0;left:calc(100% + 10px);right:auto;width:208px}.nano-side-handle{background:var(--n-surface-3);border:1px solid var(--n-border);border-left:none;border-radius:0 10px 10px 0;box-shadow:var(--n-shadow-sm);color:var(--n-text-3);cursor:pointer;display:grid;height:56px;left:0;padding:0;place-items:center;position:absolute;top:50%;transform:translateY(-50%);transition:width .15s,background .15s,color .15s;width:16px;z-index:20}.nano-side-handle:hover{background:var(--n-primary-soft);color:var(--n-primary-ink);width:22px}.nano-side-handle:focus-visible{outline:2px solid var(--n-primary-line);outline-offset:2px}@media (prefers-reduced-motion:reduce){.nano-side-handle,.nano-sidebar{transition:none}}.nano-main{background:var(--n-surface-2);min-height:0;min-width:0}.nano-main,.nano-settings{display:flex;flex:1 1;flex-direction:column}.nano-settings{overflow-y:auto}.nano-set-head{align-items:center;border-bottom:1px solid var(--n-border);display:flex;gap:14px;padding:22px 28px}.nano-back,.nano-set-head{background:var(--n-surface)}.nano-back{border:1px solid var(--n-border);border-radius:9px;color:var(--n-text-2);cursor:pointer;display:grid;height:34px;place-items:center;width:34px}.nano-back:hover{background:var(--n-surface-3)}.nano-set-title{font-size:20px;font-weight:700;letter-spacing:-.02em}.nano-set-sub{color:var(--n-text-3);font-size:13px;margin-top:2px}.nano-ghost-btn{align-items:center;background:var(--n-surface);border:1px solid var(--n-border);border-radius:9px;color:var(--n-text-2);cursor:pointer;display:flex;font-size:13px;font-weight:500;gap:7px;margin-left:auto;padding:9px 14px}.nano-ghost-btn:hover{background:var(--n-surface-3)}.nano-set-body{align-items:flex-start;display:flex;gap:22px;padding:24px 28px}.nano-set-col{display:flex;flex:1 1;flex-direction:column;gap:22px;min-width:0}.nano-card{background:var(--n-surface);border:1px solid var(--n-border);border-radius:var(--n-radius);padding:20px}.nano-card-step{font-size:15px;font-weight:700}.nano-card-hint{color:var(--n-text-3);font-size:13px;margin:2px 0 16px}.nano-modes-grid{grid-gap:12px;display:grid;gap:12px;grid-template-columns:repeat(3,1fr)}.nano-mode-card{background:var(--n-surface);border:1.5px solid var(--n-border);border-radius:var(--n-radius);cursor:pointer;padding:16px;position:relative;text-align:left;transition:border-color .15s,box-shadow .15s,background .15s}.nano-mode-card:hover{border-color:var(--n-border-2);box-shadow:var(--n-shadow-sm)}.nano-mode-card.selected{background:var(--n-primary-soft);border-color:var(--n-primary)}.nano-mode-ico{border-radius:10px;display:grid;height:38px;margin-bottom:12px;place-items:center;width:38px}.nano-mode-name{font-size:14px;font-weight:600;margin-bottom:4px}.nano-mode-desc{color:var(--n-text-2);font-size:12px;line-height:1.45}.nano-mode-check{background:var(--n-primary);border-radius:50%;color:#fff;display:grid;height:20px;place-items:center;position:absolute;right:12px;top:12px;width:20px}.nano-search-row{display:flex;gap:10px;margin-bottom:14px}.nano-search{align-items:center;background:var(--n-surface-2);border:1px solid var(--n-border);border-radius:var(--n-radius-sm);display:flex;flex:1 1;gap:9px;padding:9px 13px}.nano-search input{background:none;border:none;color:var(--n-text);flex:1 1;font-size:13px;outline:none}.nano-search input::placeholder{color:var(--n-text-3)}.nano-filter-btn{align-items:center;background:var(--n-surface);border:1px solid var(--n-border);border-radius:var(--n-radius-sm);color:var(--n-text-2);cursor:pointer;display:flex;font-size:13px;gap:7px;padding:9px 14px}.nano-capture{border:1px solid var(--n-border);border-radius:var(--n-radius);display:flex;gap:16px;overflow:hidden}.nano-tree{border-right:1px solid var(--n-border);max-height:320px;overflow-y:auto;padding:12px;width:46%}.nano-tree-node{align-items:center;border-radius:8px;color:var(--n-text);cursor:pointer;display:flex;font-size:13px;gap:8px;padding:7px 8px}.nano-tree-node:hover{background:var(--n-surface-3)}.nano-tree-node.child{padding-left:26px}.nano-tree-node.gchild{color:var(--n-text-2);padding-left:44px}.nano-tree-node.on{color:var(--n-primary-ink);font-weight:600}.nano-chk{background:var(--n-surface);border:1.5px solid var(--n-border-2);border-radius:5px;display:grid;flex-shrink:0;height:16px;place-items:center;width:16px}.nano-chk.on{background:var(--n-primary);border-color:var(--n-primary);color:#fff}.nano-caret{color:var(--n-text-3);display:grid;flex-shrink:0;place-items:center;width:14px}.nano-selected{flex:1 1;max-height:320px;overflow-y:auto;padding:14px}.nano-selected-head{align-items:center;display:flex;justify-content:space-between;margin-bottom:12px}.nano-selected-head b{font-size:13px}.nano-clear{background:none;border:none;color:var(--n-primary);cursor:pointer;font-size:12px}.nano-chips-grid{grid-gap:10px;display:grid;gap:10px;grid-template-columns:1fr 1fr}.nano-selchip{align-items:center;background:var(--n-surface-2);border:1px solid var(--n-border);border-radius:var(--n-radius-sm);display:flex;gap:9px;padding:10px}.nano-selchip-ico{background:var(--n-surface);border:1px solid var(--n-border);border-radius:7px;display:grid;flex-shrink:0;height:26px;place-items:center;width:26px}.nano-selchip-name{font-size:13px;font-weight:500}.nano-selchip-kind{color:var(--n-text-3);font-size:11px}.nano-selchip-x{background:none;border:none;color:var(--n-text-3);cursor:pointer;display:grid;margin-left:auto;place-items:center}.nano-selchip-x:hover{color:var(--n-interview)}.nano-empty-sel{color:var(--n-text-3);font-size:13px;padding:40px 0;text-align:center}.nano-include-grid{grid-gap:12px;display:grid;gap:12px;grid-template-columns:repeat(5,1fr)}.nano-inc-card{background:var(--n-surface);border:1.5px solid var(--n-border);border-radius:var(--n-radius);cursor:pointer;padding:14px;position:relative;text-align:left;transition:border-color .15s,background .15s}.nano-inc-card:hover{border-color:var(--n-border-2)}.nano-inc-card.on{background:var(--n-primary-soft);border-color:var(--n-primary)}.nano-inc-ico{border-radius:8px;display:grid;height:30px;margin-bottom:10px;place-items:center;width:30px}.nano-inc-name{font-size:13px;font-weight:600;margin-bottom:3px}.nano-inc-desc{color:var(--n-text-2);font-size:11px;line-height:1.4}.nano-inc-check{background:var(--n-primary);border-radius:5px;color:#fff;display:grid;height:18px;place-items:center;position:absolute;right:10px;top:10px;width:18px}.nano-tip{align-items:center;background:var(--n-primary-soft);border-radius:var(--n-radius-sm);color:var(--n-primary-ink);display:flex;font-size:13px;gap:9px;margin:0 28px 24px;padding:12px 16px}.nano-summary{background:var(--n-surface);border:1px solid var(--n-border);border-radius:var(--n-radius);flex-shrink:0;padding:20px;position:-webkit-sticky;position:sticky;top:0;width:300px}.nano-sum-title{font-size:16px;font-weight:700}.nano-sum-sub{color:var(--n-text-3);font-size:12px;margin:2px 0 18px}.nano-sum-block{margin-bottom:18px}.nano-sum-label{color:var(--n-text-2);display:flex;font-size:12px;font-weight:600;justify-content:space-between;margin-bottom:8px}.nano-sum-chip{background:var(--n-primary-soft);border-radius:20px;color:var(--n-primary-ink);display:inline-flex;font-size:12px;font-weight:600;margin:0 6px 6px 0;padding:4px 10px}.nano-sum-row{align-items:center;display:flex;font-size:13px;gap:10px;padding:8px 0}.nano-sum-row .n-ico{color:var(--n-text-2)}.nano-sum-row .ok{color:var(--n-ok);margin-left:auto}.nano-sum-meta{align-items:center;border-top:1px solid var(--n-border);display:flex;font-size:13px;justify-content:space-between;padding:9px 0}.nano-sum-meta:first-of-type{border-top:none}.nano-sum-meta .lbl{align-items:center;color:var(--n-text-2);display:flex;gap:7px}.nano-sum-meta .val{font-weight:600}.nano-start-btn{align-items:center;background:#818cf8;background:var(--mx,#818cf8);border:none;border-radius:var(--n-radius-sm);box-shadow:0 6px 16px color-mix(in srgb,#818cf8 35%,#0000);box-shadow:0 6px 16px color-mix(in srgb,var(--mx,#818cf8) 35%,#0000);color:#0b0d14;cursor:pointer;display:flex;font-size:14px;font-weight:600;gap:8px;justify-content:center;margin-top:16px;padding:13px;width:100%}.nano-start-btn:hover{filter:brightness(1.05)}.nano-start-btn:disabled{box-shadow:none;cursor:not-allowed;opacity:.5}.nano-chat{display:flex;flex:1 1;flex-direction:column;min-height:0;min-width:0}.nano-chat-topbar{align-items:center;background:var(--n-surface);border-bottom:1px solid var(--n-border);display:flex;gap:12px;padding:14px 22px}.nano-chat-title{align-items:center;display:flex;font-size:15px;font-weight:600;gap:8px}.nano-chat-title 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11px}.nano-mcq-mark:hover{background:var(--n-surface-3)}.nano-mcq-mark.on{background:var(--n-warn-soft);border-color:var(--n-warn-line);color:var(--n-mcq)}.nano-mcq-q{color:var(--n-text);font-size:16px;font-weight:600;line-height:1.45;margin-bottom:16px}.nano-mcq-opts{display:flex;flex-direction:column;gap:10px}.nano-mcq-opt{align-items:center;background:var(--n-surface);border:1.5px solid var(--n-border);border-radius:12px;color:var(--n-text);cursor:pointer;display:flex;font-size:14px;gap:12px;padding:12px 14px;text-align:left;transition:all 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