@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Outfit:wght@400;500;600;700;800&display=swap";
*{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary:#f5f5f7;--bg-secondary:#fff;--text-primary:#1d1d1f;--text-secondary:#86868b;--accent-color:#007aff;--accent-hover:#06c;--font-main:"Outfit", "Inter", -apple-system, sans-serif;--glass-bg:#ffffffb8;--glass-border:#00000014;--glass-shadow:0 8px 32px #0000000a;--radius-sm:12px;--radius-md:18px;--radius-lg:24px;--radius-xl:40px;--transition-fast:.15s cubic-bezier(.16, 1, .3, 1);--transition-smooth:.4s cubic-bezier(.16, 1, .3, 1)}[data-theme=kids]{--bg-primary:#f0f9ff;--bg-secondary:#fff;--text-primary:#036;--text-secondary:#4a6a8a;--accent-color:#007aff;--glass-bg:#ffffffe6;--glass-border:#007aff26;--radius-lg:28px}@media (prefers-color-scheme:dark){:root:not([data-theme=kids]){--bg-primary:#000;--bg-secondary:#1c1c1e;--text-primary:#f5f5f7;--text-secondary:#86868b;--accent-color:#0a84ff;--accent-hover:#409cff;--glass-bg:#1c1c1eb8;--glass-border:#ffffff1a;--glass-shadow:0 8px 32px #0006}}html,body{scroll-behavior:smooth;max-width:100vw;height:100%;overflow-x:hidden}body{color:var(--text-primary);background-color:var(--bg-primary);font-family:var(--font-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition-smooth), color var(--transition-smooth)}a{color:var(--accent-color);transition:color var(--transition-fast);text-decoration:none}a:hover{color:var(--accent-hover)}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:saturate(180%)blur(20px);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);border-radius:var(--radius-lg);transition:all var(--transition-smooth)}.apple-btn{background-color:var(--accent-color);color:#fff;cursor:pointer;transition:all var(--transition-fast);border:none;border-radius:980px;justify-content:center;align-items:center;gap:8px;padding:12px 28px;font-size:16px;font-weight:700;display:inline-flex}.apple-btn:hover{background-color:var(--accent-hover);filter:brightness(1.1);transform:scale(1.02)}.apple-btn:active{transform:scale(.98)}.apple-input{background:var(--bg-secondary);border:1px solid var(--glass-border);color:var(--text-primary);border-radius:var(--radius-sm);transition:all var(--transition-fast);outline:none;padding:14px 18px;font-size:16px}.apple-input:focus{border-color:var(--accent-color);box-shadow:0 0 0 4px #007aff1a}.markdown-content{line-height:1.7}.markdown-content h1,.markdown-content h2,.markdown-content h3{color:var(--text-primary);letter-spacing:-.02em;margin:1.5em 0 .8em;font-weight:800}.markdown-content p{margin-bottom:1.2em}.markdown-content table{border-collapse:collapse;border:2px solid var(--text-primary);background:var(--bg-secondary);width:100%;margin:32px 0}.markdown-content th,.markdown-content td{border:1px solid var(--text-primary);text-align:left;padding:16px}.markdown-content th{text-transform:uppercase;letter-spacing:.05em;background:#007aff0d;font-size:.85em;font-weight:800}.katex{color:inherit!important;font-size:1.1em!important}.katex-display{border-radius:var(--radius-sm);background:#00000005;padding:16px;margin:1.5em 0!important}@media (max-width:768px){.problem-sidebar{z-index:100;max-height:80vh;width:calc(100% - 40px)!important;position:fixed!important;top:auto!important;bottom:20px!important;left:20px!important}}@media print{.no-print{display:none!important}body{color:#000!important;background:#fff!important}.glass-panel{box-shadow:none!important;background:0 0!important;border:none!important}.markdown-content table{border:2px solid #000!important}.markdown-content th,.markdown-content td{color:#000!important;border:1px solid #000!important}.markdown-content th{background:#eee!important}}