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p{color:hsl(var(--muted-foreground));margin-top:4px;font-size:12px}.page-footer{border-top:1px solid hsl(var(--border));color:hsl(var(--muted-foreground));justify-content:space-between;gap:16px;margin-top:36px;padding-top:20px;font-size:12px;display:flex}.content-grid{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.lesson-card{flex-direction:column;gap:16px;display:flex}.lesson-card p{color:hsl(var(--muted-foreground));font-size:13px;line-height:1.7}.lesson-card .button{margin-top:auto}.lesson-detail{grid-template-columns:1.1fr 1fr;gap:24px;display:grid}.lesson-prose p{color:hsl(var(--muted-foreground));margin:16px 0;font-size:14px;line-height:1.9}.takeaway{background:hsl(var(--secondary));color:hsl(var(--secondary-foreground));border-radius:calc(var(--radius) - 2px);margin-top:24px;padding:16px;font-size:13px}.output-box{background:hsl(var(--muted));color:hsl(var(--muted-foreground));border:1px solid hsl(var(--border));border-radius:var(--radius);margin-top:16px;padding:16px}.output-box pre{color:hsl(var(--foreground));white-space:pre-wrap;margin:8px 0 0;font-family:Consolas,monospace;font-size:14px}.activity-layout{grid-template-columns:240px 1fr;gap:24px;display:grid}.activity-menu{flex-direction:column;align-self:start;gap:8px;display:flex}.activity-menu button{white-space:normal;text-align:left;justify-content:flex-start}.activity-menu button.selected{background:hsl(var(--accent));color:hsl(var(--accent-foreground));border-color:hsl(var(--primary) / .2)}.quiz-wrap{max-width:800px;margin:0 auto}.progress-track{background:hsl(var(--muted));border-radius:100px;height:6px;margin:16px 0 24px;overflow:hidden}.progress-fill{background:hsl(var(--primary));height:100%;transition:width var(--transition-smooth);border-radius:100px}.quiz-options{gap:12px;margin:24px 0;display:grid}.quiz-option{border:1px solid hsl(var(--input));border-radius:calc(var(--radius) - 2px);text-align:left;background:hsl(var(--card));color:hsl(var(--card-foreground));align-items:center;gap:12px;padding:16px;display:flex}.quiz-option:hover{border-color:hsl(var(--primary));background:hsl(var(--accent));color:hsl(var(--accent-foreground))}.quiz-option.chosen{border-color:hsl(var(--primary));background:hsl(var(--accent));color:hsl(var(--accent-foreground));box-shadow:inset 0 0 0 1px hsl(var(--primary))}.option-letter{border:1px solid hsl(var(--border));border-radius:6px;padding:2px 8px;font-size:12px}.feedback{background:hsl(var(--success) / .08);color:hsl(var(--success));border:1px solid hsl(var(--success) / .25);border-radius:calc(var(--radius) - 2px);margin:16px 0;padding:16px;font-size:13px}.feedback.error{background:hsl(var(--destructive) / .06);color:hsl(var(--destructive));border-color:hsl(var(--destructive) / .2)}.feedback.info{background:hsl(var(--secondary));color:hsl(var(--secondary-foreground));border-color:hsl(var(--border))}.result-score{color:hsl(var(--primary));letter-spacing:-2px;font-size:48px;font-weight:700}.result-question{border-bottom:1px solid hsl(var(--border));padding:16px 0}.result-question p{color:hsl(var(--muted-foreground));margin-top:8px;font-size:13px}.trace-grid{grid-template-columns:1.4fr 1fr;gap:20px;display:grid}.trace-explanation{color:hsl(var(--muted-foreground));margin-top:16px;font-size:13px;line-height:1.7}.variable-row{border-bottom:1px solid hsl(var(--border));justify-content:space-between;padding:12px 0;font-family:Consolas,monospace;font-size:13px;display:flex}.variable-row strong{color:hsl(var(--primary));font-weight:500}.editor{resize:vertical;background:hsl(var(--ink));width:100%;min-height:280px;color:hsl(var(--ink-foreground));border:1px solid hsl(var(--input));border-radius:var(--radius);tab-size:4;padding:20px;font-family:Consolas,monospace;font-size:13px;line-height:1.8}.field{background:hsl(var(--card));width:100%;color:hsl(var(--card-foreground));border:1px solid hsl(var(--input));border-radius:calc(var(--radius) - 2px);min-height:42px;padding:10px 12px}.field[aria-invalid=true]{border-color:hsl(var(--destructive))}.field-label{margin:16px 0 8px;font-size:13px;font-weight:500;display:block}.form-actions{flex-wrap:wrap;align-items:center;gap:12px;margin-top:20px;display:flex}.empty-state{text-align:center;flex-direction:column;align-items:center;gap:12px;padding:40px 24px;display:flex}.empty-icon{background:hsl(var(--muted));width:48px;height:48px;color:hsl(var(--muted-foreground));border-radius:50%;place-items:center;display:grid}.dashboard-grid{grid-template-columns:1fr 1fr;gap:24px;display:grid}.skill-row{margin:20px 0}.skill-row .progress-track{margin:8px 0 0}.table-scroll{overflow:auto}table{border-collapse:collapse;white-space:nowrap;width:100%;font-size:13px}th{text-align:left;color:hsl(var(--muted-foreground));background:hsl(var(--muted));font-size:12px;font-weight:500;position:sticky;top:0}th,td{border-bottom:1px solid hsl(var(--border));padding:16px}tbody tr:hover{background:hsl(var(--muted) / .5)}.numeric{text-align:right}.table-person{align-items:center;gap:12px;display:flex}.dialog-overlay{background:hsl(var(--ink) / .6);z-index:60;position:fixed;inset:0}.dialog-content{background:hsl(var(--popover));width:calc(100% - 32px);max-width:460px;max-height:90vh;color:hsl(var(--popover-foreground));border:1px solid hsl(var(--border));border-radius:var(--radius);box-shadow:var(--shadow-lg);z-index:61;padding:28px;position:fixed;top:50%;left:50%;overflow:auto;transform:translate(-50%,-50%)}.dialog-close{position:absolute;top:12px;right:12px}.notice-banner{border:1px solid hsl(var(--border));background:hsl(var(--secondary));color:hsl(var(--secondary-foreground));border-radius:var(--radius);align-items:center;gap:12px;margin-bottom:20px;padding:12px 16px;font-size:12px;display:flex}.notice-banner span{flex:1}.toast{background:hsl(var(--popover));max-width:420px;color:hsl(var(--popover-foreground));border:1px solid hsl(var(--border));box-shadow:var(--shadow-lg);border-radius:var(--radius);z-index:70;align-items:center;gap:16px;padding:12px 16px;font-size:13px;display:flex;position:fixed;bottom:24px;right:24px}.mobile-nav,.mobile-theme,.mobile-wordmark{display:none}.skeleton{border-radius:var(--radius);background:hsl(var(--muted));height:48px;animation:1.5s infinite pulse}@keyframes pulse{50%{opacity:.5}}@media (width>=1440px){.main-content{padding:40px 48px 24px}.hero-copy{padding:40px}.hero-code{padding:32px}.hero-copy h2{font-size:36px}.hero-panel{min-height:316px}}@media (width<=1279px){.sidebar{width:224px;padding:28px 16px 16px}.main-shell{margin-left:224px}.main-content{padding:28px}.topbar{padding:0 28px}.hero-copy{padding:24px}.hero-copy h2{font-size:28px}.hero-code{padding:20px}.home-columns{grid-template-columns:1.4fr 1fr}.content-grid{grid-template-columns:repeat(2,1fr)}.stat-card{padding:16px}.activity-layout{grid-template-columns:200px 1fr}.trace-grid{grid-template-columns:1fr}.hero-code .code-block{font-size:12px}.lesson-row{padding:16px}.row-meta .pill{display:none}}@media (width<=1023px){.sidebar{display:none}.main-shell{margin-left:0}.main-content{padding:24px 24px 116px}.topbar{height:64px;padding:0 24px}.mobile-nav{background:hsl(var(--card));color:hsl(var(--card-foreground));border-top:1px solid hsl(var(--border));padding:12px 8px calc(12px + env(safe-area-inset-bottom));z-index:40;justify-content:space-around;display:flex;position:fixed;bottom:0;left:0;right:0}.mobile-nav a{color:hsl(var(--muted-foreground));border-radius:6px;flex-direction:column;align-items:center;gap:4px;padding:4px;font-size:10px;display:flex}.mobile-nav a.selected{color:hsl(var(--primary));background:hsl(var(--accent))}.mobile-theme{display:inline-flex}.toast{max-width:none;bottom:100px;left:16px;right:16px}.brand small{font-size:10px}.page-footer{font-size:12px}.content-grid{grid-template-columns:repeat(3,1fr)}}@media (width<=767px){.main-content{padding:24px 16px calc(172px + env(safe-area-inset-bottom))}.topbar{padding:0 16px}.mobile-wordmark{color:hsl(var(--primary));font-size:14px;display:block}.desktop-workspace,.breadcrumb>span:last-child,.breadcrumb>svg{display:none}.toast{bottom:156px}.breadcrumb{gap:4px;font-size:12px}.topbar-right{gap:8px;font-size:0}.topbar-divider{display:none}.page-heading{align-items:flex-start}.page-heading h1{font-size:26px}.page-heading>.pill{display:none}.hero-panel{grid-template-columns:1fr}.hero-copy{padding:24px}.hero-copy h2{max-width:300px;font-size:30px}.hero-code{padding:0 24px 24px}.hero-code .code-block{font-size:12px;transform:none}.stat-grid{grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:24px}.stat-top{font-size:12px}.stat-value{font-size:24px}.home-columns,.dashboard-grid,.lesson-detail{grid-template-columns:1fr}.quick-grid{grid-template-columns:1fr;gap:12px}.content-grid,.activity-layout{grid-template-columns:1fr}.activity-menu{grid-template-columns:repeat(2,1fr);display:grid}.activity-menu button{font-size:12px}.page-footer{flex-direction:column;font-size:12px}.card{padding:20px}.lesson-list{padding:0}.lesson-row{gap:12px}.lesson-row .row-meta{gap:8px}.lesson-row .row-meta .duration{display:none}.section-title h2{font-size:18px}.mobile-nav{grid-template-columns:repeat(4,1fr);gap:4px;padding-left:8px;padding-right:8px;display:grid}.mobile-nav a{min-height:48px;padding:4px 0;font-size:12px}.hero-actions .button{padding:10px 12px}.notice-banner{flex-wrap:wrap}.notice-banner span{flex-basis:100%}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto;transition:none;animation:none}}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@keyframes spin{to{transform:rotate(360deg)}}