:root{--background-color:#121212;--surface-color:#1e1e1e;--primary-color:#007bff;--text-color:#e0e0e0;--border-color:#333;--green:#28a745;--red:#dc3545}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--background-color);color:var(--text-color);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif}.container{max-width:1200px;margin:2rem auto;padding:0 1rem}.navbar{border-bottom:1px solid var(--border-color);background-color:#000;justify-content:space-between;align-items:center;padding:1rem 2rem;display:flex}.navbar .brand{color:var(--text-color);align-items:center;gap:.75rem;font-size:1.2rem;font-weight:700;text-decoration:none;display:flex}.navbar .logo{width:auto;height:40px}.nav-links a{color:var(--text-color);margin-left:1.5rem;text-decoration:none;transition:color .2s}.nav-links a:hover{color:var(--primary-color)}.nav-links .signup-button{color:#000;background-color:#fff;border-radius:5px;padding:.5rem 1rem}.page-title{border-bottom:1px solid var(--border-color);margin-bottom:2rem;padding-bottom:.5rem}.top-dashboard{gap:1.5rem;margin-bottom:2rem;display:flex}.top-dashboard>*{flex:1}.trade-widget{background-color:var(--surface-color);border-radius:8px;justify-content:space-between;align-items:center;padding:1.5rem;display:flex}.ticker h2{margin:0 0 .5rem}.ticker p{margin:0;font-size:2rem;font-weight:700}.trade-actions button{margin-left:1rem}.buy-button,.sell-button{cursor:pointer;border:none;border-radius:5px;padding:.8rem 2rem;font-size:1rem}.buy-button{color:#000;background-color:#fff}.sell-button{color:#fff;background-color:#000;border:1px solid #fff}.terminal-container{background-color:var(--surface-color);border-radius:8px;flex-direction:column;padding:1rem;display:flex}.terminal-container .xterm{width:100%;height:100%}.options-chain{background-color:var(--surface-color);border-radius:8px;padding:1.5rem}.options-chain table{border-collapse:collapse;width:100%;margin-top:1rem}.options-chain th,.options-chain td{text-align:left;border-bottom:1px solid var(--border-color);padding:.75rem}.options-chain th{font-weight:700}.options-chain .tabs{border-bottom:1px solid var(--border-color);margin:-1.5rem -1.5rem 1.5rem;padding:0 1.5rem;display:flex}.options-chain .tabs button{color:var(--text-color);cursor:pointer;background:0 0;border:none;border-bottom:3px solid #0000;padding:.8rem 1rem;font-size:.9rem;transition:color .2s,border-color .2s}.options-chain .tabs button.active,.options-chain .tabs button:hover{color:var(--primary-color);border-bottom-color:var(--primary-color)}.strike-trade-cell{justify-content:space-around;align-items:center;display:flex}@keyframes price-update-flash{0%{background-color:var(--primary-color);color:var(--surface-color)}}.options-chain td.price-updated{animation:.5s ease-out price-update-flash}.auth-page{justify-content:center;padding-top:4rem;display:flex}.auth-form{background-color:var(--surface-color);border-radius:8px;flex-direction:column;width:100%;max-width:400px;padding:2rem;display:flex}.auth-form h2{text-align:center;margin-top:0}.auth-form input{color:#fff;background:#333;border:1px solid #444;border-radius:5px;margin-bottom:1rem;padding:.8rem}.auth-form button{background-color:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:5px;padding:.8rem;font-size:1rem}