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#00000080}body{background:var(--background);color:var(--foreground);font-family:var(--font-inter),system-ui,-apple-system,sans-serif;transition:background-color .3s,color .3s}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes slideDown{0%{opacity:0;max-height:0}to{opacity:1;max-height:500px}}@keyframes press{0%{transform:scale(1)}50%{transform:scale(.93)}to{transform:scale(1)}}@keyframes ripple{to{opacity:0;transform:scale(4)}}.animate-fade-in{animation:.3s ease-out fadeIn}.animate-slide-down{animation:.3s ease-out slideDown}.animate-press{animation:.15s ease-out press}.calc-btn{cursor:pointer;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;border:1px solid #0000;border-radius:12px;justify-content:center;align-items:center;font-weight:500;transition:all .15s;display:flex;position:relative;overflow:hidden}.calc-btn:active{animation:.15s ease-out press}.calc-btn-num{background:var(--btn-num-bg);color:var(--foreground);box-shadow:var(--shadow-sm)}.calc-btn-num:hover{background:var(--btn-num-hover);box-shadow:var(--shadow-md)}.calc-btn-op{background:var(--btn-op-bg);color:var(--primary);box-shadow:var(--shadow-sm);font-weight:600}.calc-btn-op:hover{background:var(--btn-op-hover);box-shadow:var(--shadow-md)}.calc-btn-sci{background:var(--btn-sci-bg);color:#a855f7;box-shadow:var(--shadow-sm);font-size:.85rem}.dark .calc-btn-sci{color:#c084fc}.calc-btn-sci:hover{background:var(--btn-sci-hover);box-shadow:var(--shadow-md)}.calc-btn-equal{background:var(--primary);color:#fff;box-shadow:var(--shadow-md);font-size:1.3rem;font-weight:700}.calc-btn-equal:hover{background:var(--primary-hover);box-shadow:var(--shadow-lg)}.calc-btn-clear{color:#dc2626;box-shadow:var(--shadow-sm);background:#fee2e2;font-weight:600}.dark .calc-btn-clear{color:#f87171;background:#2d1b1b}.calc-btn-clear:hover{box-shadow:var(--shadow-md);background:#fecaca}.dark .calc-btn-clear:hover{background:#3d2525}.calc-display{background:var(--display-bg);border:1px solid var(--border-color);border-radius:16px;transition:all .2s;box-shadow:inset 0 2px 4px #0000000d}.dark .calc-display{box-shadow:inset 0 2px 4px #0003}.history-item{cursor:pointer;border-radius:8px;padding:8px 12px;transition:background .15s}.history-item:hover{background:var(--surface-hover)}.custom-scrollbar::-webkit-scrollbar{width:4px}.custom-scrollbar::-webkit-scrollbar-track{background:0 0}.custom-scrollbar::-webkit-scrollbar-thumb{background:var(--muted);border-radius:4px}.theme-toggle{cursor:pointer;background:#e2e8f0;border-radius:14px;width:52px;height:28px;transition:background .3s;position:relative}.dark .theme-toggle{background:#475569}.theme-toggle:after{content:"";background:#fff;border-radius:50%;width:22px;height:22px;transition:transform .3s;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #0003}.dark .theme-toggle:after{transform:translate(24px)}.mode-toggle{background:var(--surface);border:1px solid var(--border-color);border-radius:10px;display:flex;position:relative;overflow:hidden}.mode-toggle button{z-index:1;color:var(--muted);cursor:pointer;background:0 0;border:none;padding:6px 16px;font-size:.85rem;font-weight:500;transition:color .3s;position:relative}.mode-toggle button.active{color:#fff}.mode-slider{background:var(--primary);border-radius:8px;transition:left .3s,width .3s;position:absolute;top:2px;bottom:2px}@media (max-width:480px){.calc-btn{border-radius:10px;font-size:.95rem}.calc-btn-sci{font-size:.75rem}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}