:root{--bg: #ffffff;--surface: #f8f9fa;--border: #e9ecef;--text-primary: #212529;--text-secondary: #6c757d;--accent: #007bff;--accent-red: #dc3545;--accent-green: #28a745;--blur-bg: rgba(255, 255, 255, .8);--gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%)}.light-theme{--bg: #ffffff;--surface: #f8f9fa;--border: #e9ecef;--text-primary: #212529;--text-secondary: #6c757d;--accent: #007bff;--accent-red: #dc3545;--accent-green: #28a745;--blur-bg: rgba(255, 255, 255, .8);--gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%)}.dark-theme{--bg: #121212;--surface: #1e1e1e;--border: #333333;--text-primary: #ffffff;--text-secondary: #b0b0b0;--accent: #4dabf7;--accent-red: #ff6b6b;--accent-green: #51cf66;--blur-bg: rgba(18, 18, 18, .8);--gradient: linear-gradient(135deg, #2c3e50 0%, #34495e 100%)}.btn{font-family:inherit;border-radius:12px;transition:all .2s 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var(--border);background:var(--surface);color:var(--text-primary);padding:12px;font-size:1rem;outline:none;transition:border-color .2s ease}input:focus{border-color:var(--accent)}.app-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;background:var(--blur-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.logo-container{display:flex;align-items:center;gap:.5rem;cursor:pointer;border-radius:12px;padding:.5rem;transition:background-color .2s ease}.logo-container:hover{background:var(--surface)}.logo-container h1{font-size:1.5rem;font-weight:600;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.dark-theme .logo-container h1{color:#fff;background:none;-webkit-background-clip:initial;-webkit-text-fill-color:initial;background-clip:initial}.header-controls{display:flex;align-items:center;gap:.5rem}.user-toggle,.theme-toggle,.settings-toggle{width:40px;height:40px;border-radius:50%;border:1px solid var(--border);background:var(--surface);color:var(--text-primary);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease}.user-toggle:hover,.theme-toggle:hover,.settings-toggle:hover{background:var(--accent);color:var(--bg)}main{flex:1;padding:1.5rem;max-width:800px;margin:0 auto;width:100%}.sticky-footer{background:var(--blur-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-top:1px solid var(--border);padding:1rem 1.5rem;text-align:center}.footer-text{color:var(--text-secondary);font-size:.9rem}.footer-text a{color:var(--accent);text-decoration:none}.footer-text a:hover{text-decoration:underline}.mobile-menu-toggle{display:none;background:none;border:none;color:var(--text-primary);cursor:pointer;padding:8px}.mobile-menu-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;z-index:100;display:flex;justify-content:flex-start}.mobile-menu{background:var(--surface);width:250px;height:100%;padding:1rem;box-shadow:2px 0 10px #0000001a;display:flex;flex-direction:column;gap:.5rem}.mobile-menu-item{padding:12px 16px;border:none;background:none;color:var(--text-primary);text-align:left;cursor:pointer;border-radius:8px;transition:background-color .2s ease}.mobile-menu-item:hover{background:var(--bg)}.mobile-menu-item.active{background:var(--accent);color:var(--bg)}.mobile-bottom-nav{display:none;position:fixed;bottom:0;left:0;right:0;background:var(--blur-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-top:1px solid var(--border);padding:.5rem;z-index:50}.mobile-bottom-nav 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