:root{color-scheme:light;--primary-dark:#0b1020;--accent-blue:#158aeb;--white:#ffffff;--bg:#f5f5f5;--bg-sidebar:rgba(255,255,255,0.98);--text:#0b1020;--text-secondary:rgba(11,16,32,0.6);--text-muted:rgba(11,16,32,0.35);--text-reversed:#ffffff;--primary:#0b1020;--primary-hover:#0b1020;--primary-soft:rgba(11,16,32,0.06);--accent:#158aeb;--accent-nav:#007dff;--accent-soft:rgba(21,138,235,0.12);--success:#0d9f6e;--warning:#d97706;--danger:#dc3545;--border:rgba(50,70,133,0.12);--border-light:rgba(255,255,255,0.8);--border-hover:rgba(50,70,133,0.2);--surface:rgba(255,255,255,0.98);--surface-muted:rgba(11,16,32,0.06);--surface-card:rgba(118,170,229,0.1);--surface-reversed:rgba(11,16,32,0.45);--surface-disabled:rgba(11,16,32,0.06);--btn-light-default:rgba(255,255,255,0.3);--btn-light-hover:rgba(255,255,255,0.7);--shadow-sm:0 2px 10px rgba(11,16,32,0.05);--shadow-md:0 8px 24px rgba(11,16,32,0.08);--shadow-lg:0 20px 48px rgba(11,16,32,0.1);--focus-ring:0 0 0 3px rgba(21,138,235,0.2);--radius-sm:8px;--radius-md:12px;--radius-lg:20px;--sidebar-width:279px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--text-xs:11px;--text-sm:13px;--text-base:14px;--text-md:15px;--text-lg:17px;--text-xl:20px;--text-2xl:24px;--text-3xl:28px;--fw-normal:400;--fw-medium:500;--fw-semibold:600;--fw-bold:700;--fw-extrabold:800;--hub-bg:#f0f2f5;--hub-surface:#ffffff;--hub-sidebar-bg:#0b1020;--hub-sidebar-active-bg:rgba(21,138,235,0.18);--hub-sidebar-active-border:#158aeb;--hub-sidebar-hover-bg:rgba(255,255,255,0.06);--hub-sidebar-text:rgba(255,255,255,0.72);--hub-sidebar-text-active:#ffffff;--hub-accent:#158aeb;--hub-accent-hover:#1279d4;--hub-accent-soft:#eff6ff;--hub-accent-soft-border:#bfdbfe;--hub-text:#0b1020;--hub-text-secondary:#374151;--hub-text-muted:#6b7280;--hub-text-faint:#9ca3af;--hub-border:rgba(0,0,0,0.07);--hub-border-medium:rgba(0,0,0,0.1);--hub-border-strong:rgba(0,0,0,0.16);--hub-radius-sm:4px;--hub-radius-md:6px;--hub-radius-lg:8px;--hub-radius-xl:10px;--hub-radius-2xl:12px;--hub-shadow-card:none;--hub-shadow-elevated:none;--hub-shadow-hover:none}*{box-sizing:border-box;margin:0}body,html{height:100%}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--text);background:var(--bg);line-height:1.5;-webkit-font-smoothing:antialiased}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-hover)}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);background:var(--bg-sidebar);border-right:1px solid var(--border);position:fixed;top:0;left:0;bottom:0;z-index:40;overflow-y:auto;transition:transform .25s ease,left .2s ease}.sidebar,.sidebar-brand{display:flex;flex-direction:column}.sidebar-brand{padding:20px 20px 16px;border-bottom:1px solid var(--border);align-items:flex-start;gap:8px}.sidebar-user-name{margin:0;font-size:.9rem;font-weight:600;color:var(--text)}.sidebar-user-meta{margin:0;font-size:.76rem;color:var(--text-secondary);line-height:1.3;word-break:break-word}.sidebar-brand--admin{padding:20px 20px 18px}.sidebar-platform-logo-link{display:inline-flex;align-items:center;max-width:100%;text-decoration:none;color:inherit;border-radius:8px}.sidebar-platform-logo-link:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.sidebar-brand--admin .sidebar-platform-logo-link .brand-logo,.sidebar-brand--platform .brand-logo{max-width:100%;min-width:0}.sidebar-brand--admin .brand-logo-wordmark,.sidebar-brand--platform .brand-logo-wordmark{font-size:clamp(15px,.5vw + 14px,20px)}.brand-logo{display:inline-flex;align-items:center;gap:10px}.brand-logo-icon{display:block;flex-shrink:0}.brand-logo-text{font-size:.95rem;font-weight:700;color:var(--text);letter-spacing:-.02em;white-space:nowrap}.brand-logo--platform 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ease;display:flex;flex-direction:column;align-items:center;width:100%;min-width:0}.app-main>.app-shell-header{width:100%;max-width:none;align-self:stretch;box-sizing:border-box}.main-content{width:100%;max-width:1180px;margin:0 auto;padding:32px 36px 56px;box-sizing:border-box;flex:1 1 auto;min-width:0;align-self:center}.student-dashboard-layout{display:grid;grid-gap:22px;gap:22px}.student-course-card{border:1px solid var(--border);border-radius:16px;background:linear-gradient(145deg,rgba(255,255,255,.98),rgba(247,251,255,.95));padding:24px;display:grid;grid-gap:16px;gap:16px;box-shadow:var(--shadow-md)}.student-course-head{display:grid;grid-gap:6px;gap:6px}.student-course-title{margin:0;font-size:clamp(1.25rem,2vw,1.75rem);line-height:1.2;letter-spacing:-.02em}.student-course-subtitle{margin:0;color:var(--text-secondary);font-size:.86rem}.student-course-progress{display:grid;grid-gap:8px;gap:8px}.student-progress-value{font-size:.78rem;font-weight:700;color:var(--accent)}.student-section{display:grid;grid-gap:10px;gap:10px}.student-section-title{margin:0;font-size:1.12rem;font-weight:800;letter-spacing:-.015em}.student-progress-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));grid-gap:10px;gap:10px}.student-progress-card{border:1px solid 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var(--border);border-radius:14px;background:var(--surface);padding:16px}.learning-map-hero-head{display:grid;grid-gap:6px;gap:6px}.learning-map-stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:10px;gap:10px}.student-progress-number{margin:0;font-size:1.05rem;font-weight:700}.student-progress-label{margin:0;font-size:.75rem;color:var(--text-secondary)}.student-module-head{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}.student-lessons-list{display:grid;grid-gap:8px;gap:8px}.student-lesson-row{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;border:1px solid var(--border);border-radius:12px;padding:12px;background:rgba(255,255,255,.92)}.event-card{border:1px solid var(--border);border-radius:14px;overflow:visible;background:var(--surface);-webkit-clip-path:inset(0 round 14px);clip-path:inset(0 round 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summary::-webkit-details-marker{display:none}.app-header-lang-chevron{width:24px;height:24px;color:var(--text-muted)}.app-header-lang-panel{position:absolute;right:0;top:calc(100% + 8px);min-width:140px;padding:6px;background:#ffffff;border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow-md);z-index:50}.app-header-lang-panel button{display:block;width:100%;text-align:left;padding:8px 12px;border:none;background:none;font:inherit;font-size:14px;color:var(--text);border-radius:6px;cursor:pointer}.app-header-lang-panel button:hover{background:var(--surface-muted)}.app-shell-header-hamburger{display:none;background:none;border:none;padding:4px;cursor:pointer;color:var(--text);align-items:center;justify-content:center}.mobile-header{display:none}.hamburger{background:none;border:none;padding:4px;cursor:pointer;color:var(--text)}.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:35}.standalone-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:32px 16px;position:relative;overflow:hidden;background:radial-gradient(80% 60% at 20% 0,rgba(21,138,235,.09),transparent 60%),radial-gradient(60% 50% at 90% 10%,rgba(118,170,229,.2),transparent 50%),var(--bg)}.standalone-card{width:100%;max-width:560px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:32px;position:relative;z-index:2}.standalone-card .logo{margin-bottom:24px;justify-content:center}.standalone-pulse-grid{z-index:0;opacity:.42}.standalone-home-btn{position:absolute;top:24px;left:28px;z-index:10;display:inline-flex;align-items:center;gap:7px;padding:8px 16px 8px 12px;border-radius:40px;background:rgba(255,255,255,.72);border:1px solid var(--border);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);color:var(--text-secondary);font-size:13px;font-weight:500;text-decoration:none;transition:background .18s,border-color .18s,color .18s,box-shadow .18s;box-shadow:0 2px 12px rgba(11,16,32,.06)}.standalone-home-btn svg{width:15px;height:15px;flex-shrink:0;transition:stroke .18s}.standalone-home-btn:hover{background:rgba(255,255,255,.96);border-color:var(--accent);color:var(--accent);box-shadow:0 4px 18px rgba(21,138,235,.14)}@media (max-width:480px){.standalone-home-btn span{display:none}.standalone-home-btn{padding:9px;border-radius:50%}.hub-archive-toolbar-right{flex-direction:column-reverse;align-items:unset!important}.hub-archive-rail{width:100%}.hub-disc-tabs{flex-wrap:wrap}}.onboarding-shell{display:grid;grid-gap:14px;gap:14px}.onboarding-main-header{display:grid;grid-gap:6px;gap:6px}.onboarding-main-title{margin:0;font-size:clamp(1.45rem,2vw,1.8rem);line-height:1.15;letter-spacing:-.025em;font-weight:800;color:var(--text)}.onboarding-main-subtitle{margin:0;color:var(--text-secondary);font-size:.9rem;line-height:1.5;max-width:48ch}.onboarding-question-card{border:1px solid var(--border);border-radius:14px;background:var(--surface);padding:16px;display:grid;grid-gap:14px;gap:14px}.onboarding-progress-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px}.onboarding-progress-label{font-size:.85rem;color:var(--text-secondary)}.onboarding-progress-value{font-size:.82rem;font-weight:700;color:var(--text-secondary)}.onboarding-question-head{display:grid;grid-gap:6px;gap:6px}.onboarding-question-title{margin:0;font-size:clamp(1.35rem,2vw,1.7rem);line-height:1.15;letter-spacing:-.02em;font-weight:800}.onboarding-question-help{margin:0;font-size:.9rem;line-height:1.5;color:var(--text-secondary)}.onboarding-options-group{border:0;margin:0;padding:0}.onboarding-options-list{display:grid;grid-gap:10px;gap:10px}.onboarding-choice{min-height:76px;display:grid;grid-template-columns:20px 1fr;grid-gap:12px;gap:12px;align-items:center;border-radius:12px;padding:14px}.onboarding-choice .entity-title{font-size:1.02rem;letter-spacing:-.01em}.onboarding-choice .entity-subtitle{font-size:.88rem}.onboarding-choice-indicator{width:18px;height:18px;border-radius:50%;border:1.5px solid var(--border-hover);background:var(--surface);display:inline-flex;align-items:center;justify-content:center}.onboarding-choice.active .onboarding-choice-indicator{border-color:var(--accent);background:radial-gradient(circle at center,var(--accent) 0 45%,transparent 46%)}.onboarding-choice-content{min-width:0;display:grid;grid-gap:2px;gap:2px}.onboarding-choice:focus-visible{outline:none;border-color:var(--accent);box-shadow:var(--focus-ring)}.onboarding-actions{display:flex;justify-content:space-between;align-items:center;gap:12px}.onboarding-result-header{grid-gap:8px;gap:8px}.onboarding-result-card,.onboarding-result-header{display:grid;justify-items:center;text-align:center}.onboarding-result-card{border:1px solid var(--border);border-radius:14px;padding:16px;background:var(--surface);grid-gap:10px;gap:10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.course-hero{background:linear-gradient(120deg,rgba(118,170,229,.18),rgba(255,255,255,.95) 45%,rgba(118,170,229,.1));border-radius:var(--radius-lg);padding:30px 28px;border:1px solid var(--border);margin-bottom:8px;box-shadow:var(--shadow-md)}.course-hero h1{font-size:clamp(1.4rem,2.4vw,1.9rem);font-weight:800;letter-spacing:-.025em;line-height:1.15}.course-meta{display:flex;gap:16px;margin-top:8px;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-secondary)}.module-section{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}.module-header{padding:18px 20px 14px;border-bottom:1px solid var(--border)}.module-title{font-size:1.08rem;font-weight:700;letter-spacing:-.01em}.module-subtitle{font-size:.85rem;color:var(--text-secondary);margin-top:2px}.lesson-row{display:flex;align-items:center;gap:14px;padding:14px 20px;border-bottom:1px solid var(--border);text-decoration:none;color:var(--text);transition:background .12s}.lesson-row:last-child{border-bottom:none}.lesson-row:hover{background:var(--surface-muted)}.lesson-row:active{background:rgba(11,16,32,.04)}.lesson-icon{width:36px;height:36px;border-radius:10px;background:var(--primary-soft);display:grid;place-items:center;flex-shrink:0}.lesson-icon svg{width:16px;height:16px;color:var(--primary)}.lesson-icon.done{background:rgba(13,159,110,.12)}.lesson-icon.done svg{color:var(--success)}.lesson-icon.locked{background:rgba(94,102,135,.08)}.lesson-icon.locked svg{color:var(--text-secondary);opacity:.5}.lesson-info{flex:1 1;min-width:0}.lesson-name{font-size:.92rem;font-weight:600}.lesson-duration{font-size:.78rem;color:var(--text-secondary)}.lesson-status{display:flex;align-items:center;gap:8px;flex-shrink:0}.check-icon{width:18px;height:18px;color:var(--success)}.lock-icon{width:16px;height:16px;color:var(--text-secondary);opacity:.45}.stack{display:grid;grid-gap:14px;gap:14px}.stack-tight{gap:10px}.stack-relaxed{gap:18px}.auth-check{gap:8px;text-align:center}.page-shell{display:grid;grid-gap:18px;gap:18px}.container{max-width:1180px;padding:28px 32px 48px}.no-margin{margin:0}.text-center{text-align:center}.text-right{text-align:right}.text-body-sm{font-size:.9rem}.text-caption-strong{font-size:.78rem;color:var(--text-secondary)}.label-xs,.text-caption-strong{font-weight:700;text-transform:uppercase;letter-spacing:.06em}.label-xs{font-size:.7rem}.row-tight{gap:8px}.row-margin-xs{margin-bottom:2px}.row-end{justify-content:flex-end}.section-divider-top{margin-top:24px;padding-top:16px;border-top:1px solid var(--border);text-align:center}.section-top{margin-top:24px}.section-top-sm{margin-top:16px}.flow-header{display:grid;grid-gap:10px;gap:10px}.flow-section-title{margin:0;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-secondary)}.flow-actions{display:grid;grid-gap:10px;gap:10px}.content-muted-panel{background:var(--surface-muted);border-radius:var(--radius-sm);padding:12px}.icon-box-md{width:48px;height:48px}.icon-box-md,.icon-box-sm{margin:0 auto 12px;color:var(--accent)}.icon-box-sm{width:40px;height:40px}.badge-xs{font-size:.7rem}.section-title{font-size:1.06rem;font-weight:700;margin:0}.section-subtitle{font-size:.85rem;color:var(--text-secondary);margin:2px 0 0}.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:20px 22px;box-shadow:var(--shadow-sm);transition:border-color .2s ease,box-shadow .2s 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