.dsc-scope{--accent:#f59e0b;color:var(--text);font-family:var(--font)}.dsc-course-view{grid-template-columns:260px 1fr;height:100%;min-height:0;transition:grid-template-columns .2s;display:grid;position:relative;overflow:hidden}.dsc-mobile-menu-btn{z-index:15;background:var(--sidebar-bg);border:none;border-bottom:1px solid var(--border);color:var(--text-muted);font-family:var(--font);text-align:left;cursor:pointer;align-items:center;gap:8px;width:100%;padding:10px 14px;font-size:13px;font-weight:600;display:none;position:sticky;top:0}.dsc-mobile-menu-btn:hover{color:var(--text)}.dsc-mobile-menu-btn .dsc-mobile-menu-icon{flex-direction:column;gap:3px;width:16px;display:inline-flex}.dsc-mobile-menu-btn .dsc-mobile-menu-icon span{background:currentColor;border-radius:1px;height:2px;display:block}.dsc-mobile-backdrop{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:20;background:#0000008c;display:none;position:absolute;inset:0}.dsc-sidebar{background:var(--sidebar-bg);border-right:1px solid var(--border);flex-direction:column;min-width:0;display:flex;overflow:hidden}.dsc-sidebar-full{flex-direction:column;flex:auto;min-height:0;display:flex;overflow:hidden}.dsc-sidebar-mini{flex-direction:column;align-items:center;gap:6px;width:100%;height:100%;padding:10px 0;display:none;overflow-y:auto}.dsc-sidebar-mini-toggle,.dsc-sidebar-collapse-btn{border:1px solid var(--border);background:var(--surface);width:28px;height:28px;color:var(--text-dim);font-size:14px;font-family:var(--mono);cursor:pointer;border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;transition:all .15s;display:inline-flex}.dsc-sidebar-mini-toggle:hover,.dsc-sidebar-collapse-btn:hover{color:var(--text);border-color:var(--primary)}.dsc-sidebar-mini-toggle{margin-bottom:6px}.dsc-sidebar-mini-units{flex-direction:column;align-items:center;gap:4px;width:100%;padding:0 4px;display:flex}.dsc-sidebar-mini-unit{border:1px solid var(--border);background:var(--surface);width:32px;height:32px;color:var(--text-muted);font-family:var(--mono);cursor:pointer;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;font-size:12px;font-weight:700;transition:all .12s;display:inline-flex}.dsc-sidebar-mini-unit:hover{color:var(--text);border-color:var(--primary)}.dsc-sidebar-mini-unit.active{border-color:var(--primary);color:var(--primary-light);background:#6366f126}.dsc-sidebar-mini-unit.done{color:var(--success);border-color:#6ce7bc59}@media (min-width:768px){.dsc-course-view.nav-collapsed{grid-template-columns:56px 1fr}.dsc-course-view.nav-collapsed .dsc-sidebar-full{display:none}.dsc-course-view.nav-collapsed .dsc-sidebar-mini{display:flex}}@media (max-width:767px){.dsc-sidebar-collapse-btn{display:none}.dsc-course-view.nav-collapsed .dsc-sidebar-full{display:flex}.dsc-course-view.nav-collapsed .dsc-sidebar-mini{display:none}}.dsc-sidebar-header{border-bottom:1px solid var(--border);flex-shrink:0;padding:14px 12px 12px}.dsc-sidebar-title-row{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.dsc-sidebar-title{color:var(--text);font-size:13px;font-weight:700}.dsc-progress-row{align-items:center;gap:8px;display:flex}.dsc-progress-bar{background:var(--surface2);border-radius:2px;flex:1;height:4px;overflow:hidden}.dsc-progress-fill{background:var(--primary);border-radius:2px;height:100%;transition:width .4s}.dsc-progress-label{color:var(--text-dim);font-size:10px;font-family:var(--mono);text-align:right;min-width:32px}.dsc-nav-list{flex:1;padding:8px 0;overflow-y:auto}.dsc-unit-section{border-bottom:1px solid var(--border)}.dsc-unit-section:last-child{border-bottom:none}.dsc-unit-header{cursor:pointer;color:var(--text-muted);font-size:12px;font-weight:600;font-family:var(--font);align-items:center;gap:8px;padding:10px 16px;transition:color .15s;display:flex}.dsc-unit-header:hover,.dsc-unit-header.active .dsc-unit-title{color:var(--text)}.dsc-unit-header.done .dsc-unit-title{color:var(--success)}.dsc-unit-number{color:var(--primary);white-space:nowrap;background:#6366f11f;border:1px solid #6366f140;border-radius:4px;flex-shrink:0;padding:1px 6px;font-size:10px;font-weight:700}.dsc-unit-title{font-size:12px}.dsc-unit-check{color:var(--success);margin-left:auto;font-size:11px}.dsc-lesson-list{padding:2px 0 6px}.dsc-lesson-item{cursor:pointer;width:calc(100% - 16px);font-family:var(--font);color:var(--text-muted);text-align:left;background:0 0;border:none;border-radius:6px;align-items:center;gap:8px;margin:1px 8px;padding:7px 16px 7px 28px;font-size:12px;transition:all .15s;display:flex}.dsc-lesson-item:hover{color:var(--text);background:#ffffff0a}.dsc-lesson-item.active{color:var(--primary-light);background:#6366f126}.dsc-lesson-item.done{color:var(--success)}.dsc-lesson-dot{flex-shrink:0;width:14px;font-size:11px}.dsc-main{background:var(--bg);overflow-y:auto}.dsc-home{max-width:900px;padding:32px 40px}.dsc-home-hero{margin-bottom:32px}.dsc-hero-badge{text-transform:uppercase;letter-spacing:.1em;color:var(--primary-light);background:#6366f11f;border:1px solid #6366f14d;border-radius:20px;margin-bottom:14px;padding:3px 12px;font-size:11px;font-weight:700;display:inline-block}.dsc-hero-title{color:var(--text);letter-spacing:-.3px;margin-bottom:10px;font-size:22px;font-weight:700}.dsc-hero-desc{color:var(--text-muted);max-width:540px;margin-bottom:20px;font-size:13px;line-height:1.6}.dsc-hero-stats{gap:28px;margin-bottom:20px;display:flex}.dsc-hero-stat{text-align:center}.dsc-stat-val{color:var(--primary-light);font-size:20px;font-weight:700;font-family:var(--mono);display:block}.dsc-stat-label{color:var(--text-dim);font-size:11px}.dsc-units-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;display:grid}.dsc-unit-card{background:var(--panel-bg);border:1px solid var(--border);cursor:pointer;border-radius:10px;padding:14px;transition:border-color .15s}.dsc-unit-card:hover{border-color:var(--primary-dark)}.dsc-unit-card-header{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.dsc-unit-card-num{text-transform:uppercase;letter-spacing:.08em;color:var(--primary-light);font-size:10px;font-weight:700}.dsc-unit-card-prog{color:var(--text-dim);font-size:11px;font-family:var(--mono)}.dsc-unit-card-title{color:var(--text);margin-bottom:6px;font-size:14px;font-weight:700;line-height:1.3}.dsc-unit-card-sub{color:var(--text-muted);margin-bottom:12px;font-size:11px;line-height:1.4}.dsc-unit-card-bar{background:var(--surface2);border-radius:2px;height:3px;overflow:hidden}.dsc-unit-card-fill{background:var(--primary);border-radius:2px;height:100%;transition:width .3s}.dsc-lesson{max-width:820px;padding:32px 40px}.dsc-lesson-header{margin-bottom:24px}.dsc-lesson-unit-label{color:var(--text-dim);text-transform:uppercase;letter-spacing:.08em;font-size:11px;font-weight:600}.dsc-lesson-title{color:var(--text);letter-spacing:-.3px;margin:8px 0;font-size:22px;font-weight:700}.dsc-lesson-desc{color:var(--text-muted);font-size:14px;line-height:1.6}.dsc-completed-badge{color:var(--success);background:#6ce7bc1a;border:1px solid #6ce7bc40;border-radius:20px;margin-top:8px;padding:2px 10px;font-size:11px;display:inline-block}.dsc-lesson-body{flex-direction:column;gap:18px;margin-bottom:32px;display:flex}.dsc-text{color:var(--text-muted);font-size:14px;line-height:1.75}.dsc-callout{border:1px solid #6366f133;border-left:3px solid var(--primary);background:#6366f10f;border-radius:8px;flex-direction:column;gap:5px;padding:12px 16px;display:flex}.dsc-callout-label{text-transform:uppercase;letter-spacing:.1em;color:var(--primary-light);font-size:10px;font-weight:700}.dsc-callout-body{color:var(--text-muted);font-size:13px;line-height:1.6}.dsc-visual-wrap{border-radius:12px;overflow:hidden}.dsc-code-wrap{background:var(--panel-bg);border:1px solid var(--border);border-radius:8px;overflow:hidden}.dsc-code-header{border-bottom:1px solid var(--border);background:var(--surface);justify-content:space-between;align-items:center;padding:6px 14px;display:flex}.dsc-code-lang{text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);font-size:10px;font-weight:700}.dsc-copy-btn{border:1px solid var(--border);color:var(--text-dim);cursor:pointer;background:0 0;border-radius:4px;padding:2px 8px;font-size:10px;transition:all .12s}.dsc-copy-btn:hover{border-color:var(--primary);color:var(--primary-light)}.dsc-code{font-family:var(--mono);color:#c2cbe0;white-space:pre;margin:0;padding:14px 16px;font-size:12px;line-height:1.65;overflow-x:auto}.dsc-exercises{margin-bottom:28px}.dsc-exercises-title{color:var(--text);text-transform:uppercase;letter-spacing:.08em;margin-bottom:14px;font-size:13px;font-weight:700}.dsc-exercise{background:var(--panel-bg);border:1px solid var(--border);border-radius:10px;margin-bottom:12px;padding:16px}.dsc-exercise-question{color:var(--text);margin-bottom:12px;font-size:13px;font-weight:500;line-height:1.5}.dsc-exercise-options{flex-direction:column;gap:7px;margin-bottom:10px;display:flex}.dsc-exercise-option{background:var(--surface);border:1px solid var(--border);font-family:var(--font);color:var(--text-muted);cursor:pointer;text-align:left;border-radius:7px;align-items:flex-start;gap:10px;padding:9px 12px;font-size:12px;transition:all .12s;display:flex}.dsc-exercise-option:hover:not(:disabled){border-color:var(--primary);color:var(--text)}.dsc-exercise-option.selected{border-color:var(--primary);color:var(--text);background:#6366f114}.dsc-exercise-option.correct{border-color:var(--success);color:var(--success);background:#6ce7bc14}.dsc-exercise-option.wrong{border-color:var(--danger);color:var(--danger);background:#ef444414}.dsc-exercise-option:disabled{cursor:default}.dsc-option-letter{font-size:10px;font-weight:700;font-family:var(--mono);background:var(--surface2);border-radius:4px;flex-shrink:0;padding:1px 5px}.dsc-reveal-btn{color:var(--primary-light);font-size:12px;font-family:var(--font);cursor:pointer;background:#6366f11a;border:1px solid #6366f14d;border-radius:6px;padding:6px 14px;transition:all .15s}.dsc-reveal-btn:hover{background:var(--primary);color:#fff;border-color:var(--primary)}.dsc-explanation{border-radius:7px;align-items:flex-start;gap:8px;margin-top:10px;padding:10px 14px;font-size:12px;line-height:1.6;display:flex}.dsc-explanation.correct{color:var(--text-muted);background:#6ce7bc14;border:1px solid #6ce7bc40}.dsc-explanation.wrong{color:var(--text-muted);background:#ef44440f;border:1px solid #ef444433}.dsc-explanation-icon{flex-shrink:0;font-size:13px}.dsc-lesson-nav{border-top:1px solid var(--border);justify-content:space-between;align-items:center;padding:16px 0;display:flex}.dsc-nav-btn{background:var(--surface);border:1px solid var(--border);color:var(--text-muted);font-size:13px;font-weight:500;font-family:var(--font);cursor:pointer;border-radius:7px;padding:8px 18px;transition:all .15s}.dsc-nav-btn:hover:not(:disabled){border-color:var(--primary);color:var(--text)}.dsc-nav-btn:disabled{opacity:.3;cursor:not-allowed}.dsc-nav-btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.dsc-nav-btn.primary:hover:not(:disabled){background:var(--primary-dark)}.dsc-nav-center{align-items:center;display:flex}.dsc-complete-btn{color:var(--success);font-size:13px;font-weight:600;font-family:var(--font);cursor:pointer;background:#6ce7bc1a;border:1px solid #6ce7bc4d;border-radius:7px;padding:8px 18px;transition:all .15s}.dsc-complete-btn:hover{background:#6ce7bc33}.dsc-nav-done{color:var(--success);font-size:12px}.dsc-viz-wrap{background:var(--panel-bg);border:1px solid var(--border);border-radius:12px;overflow:hidden}.dsc-viz-header{border-bottom:1px solid var(--border);background:var(--surface);justify-content:space-between;align-items:center;padding:10px 14px;display:flex}.dsc-viz-title{text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);font-size:11px;font-weight:700}.dsc-viz-btn{background:var(--surface2);border:1px solid var(--border);color:var(--text-muted);font-size:11px;font-family:var(--mono);cursor:pointer;border-radius:5px;padding:3px 10px;transition:all .12s}.dsc-viz-btn:hover{border-color:var(--primary);color:var(--text)}.dsc-viz-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.dsc-viz-svg{background:var(--bg);width:100%;max-width:100%;height:auto;display:block}@media (max-width:767px){.dsc-viz-header{flex-wrap:wrap;gap:6px;padding:8px 10px}.dsc-viz-controls{gap:6px;padding:8px 10px}.dsc-viz-btn{padding:6px 10px;font-size:12px}.dsc-viz-info{padding:8px 10px;line-height:1.4}}.dsc-viz-controls{border-top:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:8px;padding:10px 14px;display:flex}.dsc-viz-label{color:var(--text-dim);font-size:11px;font-family:var(--mono)}.dsc-viz-input{accent-color:var(--primary)}.dsc-viz-info{color:var(--text-dim);font-size:11px;font-family:var(--mono);border-top:1px solid var(--border);padding:8px 14px}@media (max-width:767px){.dsc-course-view{height:auto;display:block;overflow:visible}.dsc-mobile-menu-btn{display:flex}.dsc-sidebar{z-index:30;width:280px;max-width:85vw;transition:transform .2s;position:fixed;top:0;bottom:0;left:0;transform:translate(-100%);box-shadow:0 0 40px #0006}.dsc-course-view.uc-mobile-open .dsc-sidebar{transform:translate(0)}.dsc-course-view.uc-mobile-open .dsc-mobile-backdrop{z-index:25;display:block;position:fixed;inset:0}.dsc-main{overflow-y:visible}.dsc-course-view.nav-collapsed .dsc-sidebar-full{display:flex}.dsc-course-view.nav-collapsed .dsc-sidebar-mini,.dsc-sidebar-collapse-btn{display:none}.dsc-home,.dsc-lesson{padding:18px 16px}.dsc-hero-title,.dsc-lesson-title{font-size:20px}.dsc-units-grid{grid-template-columns:1fr}}@media (max-width:480px){.dsc-home,.dsc-lesson{padding:14px 12px}.dsc-hero-title,.dsc-lesson-title{font-size:18px}}