*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--grad-start: #667eea;--grad-end: #764ba2;--hero-gradient: linear-gradient(135deg, #667eea 0%, #5a3eab 50%, #764ba2 100%);--white: #ffffff;--bg-light: #f8f9fa;--border: #e0e0e0;--text: #333333;--text-muted: #666666;--input-bg: #ffffff;--input-disabled-bg: #f0f0f0;--radius-sm: 12px;--radius-md: 18px;--radius-lg: 25px;--shadow-card: 0 20px 60px rgba(0, 0, 0, .3);--transition: .25s ease;--sidebar-width: 240px;--sidebar-collapsed-width: 0px;--topbar-height: 60px;--term-bg: #0d1117;--term-text: #c9d1d9;--term-prompt: #58a6ff;--term-success: #3fb950;--term-warning: #d29922;--term-error: #f85149;--term-muted: #6e7681;--term-highlight: #388bfd;--term-border: #21262d;--term-header: #161b22}html.dark{--hero-gradient: linear-gradient(135deg, #1a1f4a 0%, #2b1e5a 50%, #2d1b4e 100%);--white: #1e1e2e;--bg-light: #27273a;--border: #3a3a50;--text: #e2e2f0;--text-muted: #9494b0;--input-bg: #2a2a3e;--input-disabled-bg: #232334;--shadow-card: 0 20px 60px rgba(0, 0, 0, .6)}html{color-scheme:light}html.dark{color-scheme:dark}body,.card,input,select,textarea,button{transition:background-color .3s ease,color .3s ease,border-color .3s ease,box-shadow .3s ease}html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:15px;color:var(--text);background:var(--bg-light);min-height:100vh}html.dark body{background:var(--bg-light)}input,select,textarea{background-color:var(--input-bg);color:var(--text);border-color:var(--border)}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit}@keyframes slideIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:slideIn .3s ease}.placeholder-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:300px;gap:16px;color:var(--text-muted);text-align:center;padding:40px;animation:slideIn .3s ease}.placeholder-page .placeholder-icon{font-size:3rem;opacity:.5}.placeholder-page h2{font-size:1.5rem;font-weight:700;color:var(--text)}.placeholder-page p{font-size:.95rem;max-width:420px;line-height:1.6}.placeholder-page .badge{display:inline-block;padding:4px 12px;border-radius:20px;font-size:.75rem;font-weight:600;background:linear-gradient(135deg,var(--grad-start),var(--grad-end));color:#fff;letter-spacing:.5px}