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#1976d2;outline-offset:2px}@media print{.app-header,.app-footer{display:none}.app-main{padding:0}.calculator-container{box-shadow:none;border:1px solid #ccc}}html,body{margin:0;padding:0;height:100%;width:100%;overflow:hidden}#root{height:100%;width:100%;display:flex;flex-direction:column}:root{--primary-color: #1976d2;--primary-dark: #1565c0;--primary-light: #42a5f5;--accent-color: #ff4081;--background-color: #f5f5f5;--surface-color: #ffffff;--text-primary: #212121;--text-secondary: #757575;--divider-color: #e0e0e0;--error-color: #f44336;--warning-color: #ff9800;--success-color: #4caf50;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-xxl: 3rem;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-md: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-xxl: 1.5rem;--font-size-display: 2rem;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .12);--shadow-md: 0 4px 6px rgba(0, 0, 0, .12);--shadow-lg: 0 10px 20px rgba(0, 0, 0, .15);--border-radius: .5rem;--border-radius-sm: .25rem;--border-radius-lg: 1rem;--transition-fast: .15s ease;--transition-normal: .2s ease;--transition-slow: .3s ease}@media(prefers-color-scheme:dark){:root{--background-color: #121212;--surface-color: #1e1e1e;--text-primary: #e0e0e0;--text-secondary: #a0a0a0;--divider-color: #333333}}html{font-size:16px;scroll-behavior:smooth}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica 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Mono,monospace;font-size:var(--font-size-lg);text-align:right;min-height:60px;display:flex;align-items:center;justify-content:flex-end}.calculator-grid{display:grid;gap:var(--spacing-sm);margin-top:var(--spacing-md)}.calculator-button{min-height:60px;border:none;border-radius:var(--border-radius);font-size:var(--font-size-md);font-weight:500;cursor:pointer;transition:all var(--transition-fast);background-color:var(--surface-color);color:var(--text-primary);border:1px solid var(--divider-color)}.calculator-button:hover{background-color:var(--primary-light);color:#fff;transform:translateY(-1px)}.calculator-button:active{transform:translateY(0)}.calculator-button.operator{background-color:var(--primary-color);color:#fff}.calculator-button.number{background-color:var(--surface-color)}.calculator-button.function{background-color:var(--accent-color);color:#fff}@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@media(prefers-contrast:high){:root{--divider-color: #000000;--text-secondary: #000000}.calculator-button{border-width:2px}}