:root{color-scheme:light;--bg:#f4f6fb;--bg-gradient:radial-gradient(circle at 50% 0%, #e4e8fb 0%, #f4f6fb 70%);--card-bg:#ffffffd9;--card-border:#0f172a17;--card-hover-border:#4f46e559;--sidebar-bg:#fffc;--header-bg:#ffffffe0;--bottom-nav-bg:#fffffff5;--input-bg:#fffffff2;--text:#0f172a;--text-strong:#020617;--text-muted:#475569;--text-faint:#0f172a33;--border:#0f172a1a;--hairline:#0f172a0f;--surface-1:#0f172a06;--surface-2:#0f172a0b;--surface-3:#0f172a17;--scrollbar:#0f172a33;--scrollbar-hover:#0f172a59;--accent:#4f46e5;--accent-text:#4338ca;--accent-soft:#4f46e514;--accent-soft-strong:#4f46e524;--accent-soft-border:#4f46e547;--accent-gradient:linear-gradient(135deg, #4f46e5 0%, #9333ea 100%);--text-gradient:linear-gradient(135deg, #4338ca 0%, #7e22ce 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10px 10px -5px #0003}:root{--sidebar-width:272px;--mobile-nav-height:60px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}[hidden]{display:none!important}html{background-color:var(--bg);background-image:var(--bg-gradient);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;height:100%;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;overflow:hidden}body{height:100%;overflow:hidden}h1,h2,h3,h4,h5,h6{color:var(--text);font-family:Plus Jakarta Sans,Inter,system-ui,sans-serif;font-weight:700;line-height:1.25}a{color:var(--accent-text);text-decoration:none;transition:color .2s}a:hover{color:var(--accent)}button,input,select,textarea{font:inherit}code{background-color:var(--surface-2);border:1px solid var(--hairline);border-radius:4px;padding:.15em .3em;font-family:Fira Code,ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}:focus-visible{outline:3px solid 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cubic-bezier(.4,0,.2,1),background .2s,border-color .2s,box-shadow .2s;display:inline-flex}.btn svg{flex-shrink:0;width:16px;height:16px}.btn-primary{background:var(--accent-gradient);color:var(--on-accent);box-shadow:0 4px 12px var(--accent-shadow)}.btn-primary:hover{box-shadow:0 6px 16px var(--accent-shadow);color:var(--on-accent);transform:translateY(-2px)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--surface-2);border-color:var(--border);color:var(--text)}.btn-secondary:hover{background:var(--surface-3);color:var(--text)}.btn-danger{background:var(--danger-bg);border-color:var(--danger-border);color:var(--danger-text)}.btn-danger:hover{background:var(--danger-bg-hover);color:var(--danger-text)}.btn:disabled,.btn[aria-disabled=true]{opacity:.55;cursor:not-allowed;box-shadow:none;transform:none}.toggle-switch{cursor:pointer;user-select:none;align-items:center;gap:.65rem;min-height:44px;display:inline-flex}.toggle-slider{background-color:var(--surface-3);border:1px solid var(--border);border-radius:24px;flex-shrink:0;width:44px;height:24px;transition:background-color .25s,border-color .25s;position:relative}.toggle-slider:before{content:"";background-color:var(--knob);width:18px;height:18px;box-shadow:var(--shadow-sm);border-radius:50%;transition:transform .25s cubic-bezier(.4,0,.2,1);position:absolute;bottom:2px;left:2px}.toggle-switch input:checked+.toggle-slider{background-color:var(--accent);border-color:var(--accent-soft-border)}.toggle-switch input:checked+.toggle-slider:before{transform:translate(20px)}.toggle-switch input:focus-visible+.toggle-slider{outline:3px solid var(--focus-ring);outline-offset:2px}@media (width<=768px){.sidebar{display:none}.mobile-header{display:block}.mobile-bottom-nav{display:flex}.content-container{padding:1rem;padding-bottom:calc(var(--mobile-nav-height) + env(safe-area-inset-bottom) + 1rem)}.page-title{font-size:1.9rem}.page-subtitle{font-size:.95rem}}@media (width<=360px){.mobile-bottom-nav .nav-item{font-size:.64rem}.mobile-title{font-size:.95rem}.header-brand,.header-content{gap:.4rem}.header-actions{gap:.25rem}.mobile-exam{padding:.15rem .4rem;font-size:.65rem}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.glass-card:hover,.btn:hover,.gear-btn:hover{transform:none!important}}.theme-toggle{background:var(--surface-2);border:1px solid var(--border);width:44px;height:44px;color:var(--text-muted);cursor:pointer;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;transition:background .2s,color .2s,border-color .2s;display:inline-flex}.theme-toggle:hover{background:var(--accent-soft-strong);border-color:var(--accent-soft-border);color:var(--accent-text)}.theme-toggle svg{width:20px;height:20px}.theme-toggle .icon-sun{display:none}:root[data-theme=dark] .theme-toggle .icon-sun{display:block}:root[data-theme=dark] .theme-toggle .icon-moon{display:none}