:root{--color-bg: #0d1117;--color-bg-secondary: #161b22;--color-bg-tertiary: #21262d;--color-border: #30363d;--color-text: #c9d1d9;--color-text-secondary: #8b949e;--color-primary: #58a6ff;--color-success: #3fb950;--color-danger: #f85149;--color-warning: #d29922;--color-buy: #26a69a;--color-sell: #ef5350}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans,Helvetica,Arial,sans-serif;background-color:var(--color-bg);color:var(--color-text);line-height:1.6}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}.login-container{background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:8px;padding:40px;width:100%;max-width:400px}.login-container 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