:root{--bg-color: #030712;--sidebar-bg: rgba(17, 24, 39, .7);--chat-bg: #0f172a;--text-primary: #f3f4f6;--text-secondary: #9ca3af;--accent-color: #6366f1;--accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);--glass-border: rgba(255, 255, 255, .1);--user-msg-bg: #2563eb;--ai-msg-bg: #1f2937;--font-sans: "Inter", sans-serif;--font-serif: "Playfair Display", serif}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);font-family:var(--font-sans);height:100vh;overflow:hidden;-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,h6{font-family:var(--font-serif)}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#374151;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#4b5563}.glass{background:var(--sidebar-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-right:1px solid var(--glass-border)}.btn-primary{background:var(--accent-gradient);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:9999px;font-weight:600;cursor:pointer;transition:transform .1s,opacity .2s;box-shadow:0 4px 12px #6366f14d}.btn-primary:hover{opacity:.9;transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}input[type=text]{background:#1f293780;border:1px solid var(--glass-border);color:#fff;padding:.75rem 1rem;border-radius:12px;width:100%;font-size:1rem;transition:border-color .2s}input[type=text]:focus{outline:none;border-color:var(--accent-color)}