:root{--calculator-primary:var(--main-primary);--calculator-text-primary:#0f172a;--calculator-text-secondary:#64748b;--calculator-bg:#fff;--calculator-bg-secondary:#f8fafc;--calculator-border:#e2e8f0;--calculator-display-bg:#fff;--calculator-display-text:#0f172a;--calculator-display-expression:#64748b;--calculator-btn-bg:#fff;--calculator-btn-text:#1e293b;--calculator-btn-shadow:0 1px 3px #00000014;--calculator-btn-shadow-hover:0 4px 12px #0000001f;--calculator-btn-number-bg:#fff;--calculator-btn-number-text:#0f172a;--calculator-btn-operator-bg:#f1f5f9;--calculator-btn-operator-text:#6366f1;--calculator-btn-function-bg:#f8fafc;--calculator-btn-function-text:#475569;--calculator-btn-equals-bg:linear-gradient(135deg,#6366f1 0%,#4f46e5 100%);--calculator-btn-equals-text:#fff;--calculator-btn-equals-shadow:0 4px 14px #6366f166;--calculator-btn-scientific-bg:#fef3c7;--calculator-btn-scientific-text:#92400e;--calculator-btn-constant-bg:#e0e7ff;--calculator-btn-constant-text:#3730a3;--calculator-mode-bg:#f1f5f9;--calculator-mode-text:#64748b;--calculator-mode-active-bg:#6366f1;--calculator-mode-active-text:#fff;--calculator-mode-shadow:0 2px 8px #6366f140;--calculator-history-bg:#fff;--calculator-history-border:#e2e8f0;--calculator-history-item-bg:#f8fafc;--calculator-history-item-hover:#f1f5f9;--calculator-history-shadow:0 2px 8px #00000014;--calculator-gap:.625rem;--calculator-padding:1.75rem;--calculator-radius:16px;--calculator-btn-radius:10px;--calculator-shadow-sm:0 1px 2px #0000000d;--calculator-shadow:0 4px 12px #00000014;--calculator-shadow-lg:0 8px 24px #0000001f}._calculator-container{align-items:flex-start;gap:2rem;max-width:1280px;margin:0 auto;padding:0 1rem;display:flex}._calculator-wrapper{flex:1;max-width:520px;margin:0 auto}@media (max-width:1024px){._calculator-container{flex-direction:column;align-items:stretch;gap:1.5rem}._calculator-wrapper{width:100%;max-width:600px;margin:0 auto}}@media (max-width:640px){._calculator-container{gap:1.25rem;padding:0 .75rem}._calculator-wrapper{max-width:100%}}._calculator-wrapper{box-shadow:var(--calculator-shadow-lg);border-radius:var(--calculator-radius);background:var(--calculator-bg);overflow:hidden}._calculator-display{background:var(--calculator-display-bg);border-radius:var(--calculator-radius)var(--calculator-radius)0 0;padding:var(--calculator-padding);margin-bottom:0;padding-bottom:1.5rem;position:relative}._calculator-display:after{content:"";background:var(--calculator-border);opacity:.5;height:1px;position:absolute;bottom:0;left:1.5rem;right:1.5rem}._calculator-display-header{justify-content:space-between;align-items:center;gap:1rem;margin-bottom:1rem;display:flex}._calculator-mode-switch{background:var(--calculator-mode-bg);border-radius:var(--calculator-btn-radius);gap:.5rem;padding:.25rem;display:flex}._calculator-mode-btn{border-radius:calc(var(--calculator-btn-radius) - 2px);color:var(--calculator-mode-text);cursor:pointer;white-space:nowrap;background:0 0;border:0 #0000;padding:.5rem 1.125rem;font-size:.875rem;font-weight:600;transition:all .2s cubic-bezier(.4,0,.2,1)}._calculator-mode-btn:hover{color:var(--calculator-text-primary)}._calculator-mode-btn._calculator-mode-active{background:var(--calculator-mode-active-bg);color:var(--calculator-mode-active-text);box-shadow:var(--calculator-mode-shadow)}._calculator-history-toggle{border-style:solid;border-width:1px;border-color:var(--calculator-border);border-radius:var(--calculator-btn-radius);background:var(--calculator-btn-bg);width:40px;height:40px;color:var(--calculator-text-secondary);cursor:pointer;box-shadow:var(--calculator-shadow-sm);justify-content:center;align-items:center;padding:0;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex}._calculator-history-toggle:hover{color:var(--calculator-primary);box-shadow:var(--calculator-btn-shadow-hover)}._calculator-history-toggle svg{width:18px;height:18px}._calculator-display-expression{min-height:1.75rem;color:var(--calculator-display-expression);text-align:right;word-break:break-all;letter-spacing:.02em;cursor:text;outline:none;margin-bottom:.75rem;font-size:1.125rem;font-weight:600}._calculator-display-expression:focus{outline:none}._calculator-display-expression:empty:before{content:"";display:inline-block}._calculator-display-result{color:var(--calculator-display-text);text-align:right;word-break:break-all;letter-spacing:-.02em;font-size:3rem;font-weight:700;line-height:1.1;transition:opacity .2s}@media (max-width:640px){._calculator-display{border-radius:var(--calculator-radius)var(--calculator-radius)0 0;padding:1.25rem}._calculator-display:after{left:1.25rem;right:1.25rem}._calculator-display-expression{min-height:1.5rem;font-size:.9375rem}._calculator-display-result{font-size:2.25rem}._calculator-mode-btn{padding:.4rem .875rem;font-size:.8125rem}._calculator-history-toggle{width:36px;height:36px}}@media (max-width:480px){._calculator-display{padding:1rem}._calculator-display:after{left:1rem;right:1rem}._calculator-display-header{margin-bottom:.875rem}._calculator-display-expression{margin-bottom:.5rem;font-size:.875rem}._calculator-display-result{font-size:2rem}}._calculator-keyboard{background:var(--calculator-bg);border-radius:0 0 var(--calculator-radius)var(--calculator-radius);padding:var(--calculator-padding);border-style:none;border-width:0;padding-top:1.25rem;position:relative}._calculator-keyboard-standard,._calculator-keyboard-scientific{gap:var(--calculator-gap);display:none}._calculator-keyboard-standard._calculator-keyboard-active,._calculator-keyboard-scientific._calculator-keyboard-active{display:grid}._calculator-keyboard-standard{grid-template-columns:repeat(4,1fr)}._calculator-btn-equals-wide,._calculator-btn-equals-scientific{grid-column:span 3}._calculator-keyboard-scientific{grid-template-columns:repeat(6,1fr)}._calculator-btn{border-style:solid;border-width:1px;border-color:var(--calculator-border);border-radius:var(--calculator-btn-radius);background:var(--calculator-btn-bg);min-height:64px;color:var(--calculator-btn-text);cursor:pointer;-webkit-user-select:none;user-select:none;box-shadow:var(--calculator-btn-shadow);padding:1rem;font-size:1.125rem;font-weight:600;transition:all .2s cubic-bezier(.4,0,.2,1)}._calculator-btn:hover:not(:empty){box-shadow:var(--calculator-btn-shadow-hover);border-color:var(--calculator-primary)}._calculator-btn:active:not(:empty){box-shadow:var(--calculator-shadow-sm);transform:scale(.97)}._calculator-btn:empty{cursor:default;background:0 0;border-width:0}._calculator-btn-number{background:var(--calculator-btn-number-bg);color:var(--calculator-btn-number-text);font-size:1.375rem;font-weight:600}._calculator-btn-operator{background:var(--calculator-btn-operator-bg);color:var(--calculator-btn-operator-text);font-size:1.625rem;font-weight:600}._calculator-btn-operator:hover:not(:empty){background:var(--calculator-btn-operator-bg);color:var(--calculator-primary)}._calculator-btn-function{background:var(--calculator-btn-function-bg);color:var(--calculator-btn-function-text);font-size:1.0625rem;font-weight:600}._calculator-btn-equals{background:var(--calculator-btn-equals-bg);color:var(--calculator-btn-equals-text);box-shadow:var(--calculator-btn-equals-shadow);font-size:1.625rem;font-weight:700}._calculator-btn-equals:hover:not(:empty){box-shadow:0 6px 20px #6366f180}._calculator-btn-equals:active:not(:empty){box-shadow:var(--calculator-btn-equals-shadow)}._calculator-btn-scientific{background:var(--calculator-btn-scientific-bg);color:var(--calculator-btn-scientific-text);font-size:.9375rem;font-weight:600}._calculator-btn-constant{background:var(--calculator-btn-constant-bg);color:var(--calculator-btn-constant-text);font-size:1.0625rem;font-weight:600}._calculator-btn-clear{font-weight:700;color:#dc2626!important;background:#fee2e2!important}._calculator-btn-clear:hover:not(:empty){color:#b91c1c!important;background:#fecaca!important;border-color:#dc2626!important}._calculator-btn-delete{justify-content:center;align-items:center;display:flex}._calculator-btn-delete svg{width:20px;height:20px}@media (max-width:640px){._calculator-keyboard{padding:1rem}._calculator-btn{min-height:56px;padding:.75rem;font-size:1.0625rem}._calculator-btn-number{font-size:1.25rem}._calculator-btn-operator,._calculator-btn-equals{font-size:1.375rem}._calculator-btn-function{font-size:.9375rem}._calculator-btn-scientific{padding:.5rem;font-size:.8125rem}._calculator-btn-delete svg{width:18px;height:18px}}@media (max-width:480px){._calculator-keyboard{border-radius:0 0 var(--calculator-radius)var(--calculator-radius);padding:.875rem .75rem .75rem}._calculator-keyboard-standard{gap:.5rem}._calculator-keyboard-scientific{grid-template-columns:repeat(6,1fr);gap:.375rem}._calculator-btn{min-height:50px;padding:.625rem}._calculator-btn-number{font-size:1.125rem}._calculator-btn-scientific{padding:.375rem;font-size:.75rem}._calculator-btn-delete svg{width:16px;height:16px}}._calculator-history{background:var(--calculator-history-bg);border-style:solid;border-width:1px;border-color:var(--calculator-history-border);border-radius:var(--calculator-radius);width:340px;max-height:600px;box-shadow:var(--calculator-shadow);flex-direction:column;display:flex;overflow:hidden}._calculator-history.hidden{display:none}._calculator-history-header{border-bottom-style:solid;border-bottom-width:1px;border-bottom-color:var(--calculator-history-border);justify-content:space-between;align-items:center;padding:1rem 1.25rem;display:flex}._calculator-history-title{color:var(--calculator-text-primary);letter-spacing:-.01em;margin:0;font-size:1.0625rem;font-weight:700}._calculator-history-clear{border-style:solid;border-width:1px;border-color:var(--calculator-border);border-radius:var(--calculator-btn-radius);color:var(--calculator-text-secondary);cursor:pointer;box-shadow:var(--calculator-shadow-sm);background:0 0;align-items:center;gap:.375rem;padding:.5rem .875rem;font-size:.8125rem;font-weight:600;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex}._calculator-history-clear:hover{color:var(--calculator-text-primary);box-shadow:var(--calculator-btn-shadow-hover)}._calculator-history-clear svg{width:14px;height:14px}._calculator-history-list{flex:1;padding:1rem;overflow-y:auto}._calculator-history-list::-webkit-scrollbar{width:6px}._calculator-history-list::-webkit-scrollbar-track{background:0 0}._calculator-history-list::-webkit-scrollbar-thumb{background:var(--calculator-border);border-radius:3px}._calculator-history-list::-webkit-scrollbar-thumb:hover{background:var(--calculator-text-secondary)}._calculator-history-empty{text-align:center;color:var(--calculator-text-secondary);margin:0;padding:3rem 1.5rem;font-size:.9375rem;font-weight:500}._calculator-history-item{background:var(--calculator-history-item-bg);border-radius:var(--calculator-btn-radius);cursor:pointer;box-shadow:var(--calculator-shadow-sm);border:1px solid #0000;justify-content:space-between;align-items:center;margin-bottom:.625rem;padding:.875rem 1rem;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex}._calculator-history-item:hover{background:var(--calculator-history-item-hover);border-color:var(--calculator-primary);box-shadow:var(--calculator-btn-shadow-hover)}._calculator-history-item:last-child{margin-bottom:0}._calculator-history-item-content{flex:1;min-width:0}._calculator-history-item-expression{color:var(--calculator-text-secondary);text-overflow:ellipsis;white-space:nowrap;letter-spacing:.01em;margin-bottom:.375rem;font-size:.9375rem;font-weight:500;overflow:hidden}._calculator-history-item-result{color:var(--calculator-text-primary);text-overflow:ellipsis;white-space:nowrap;letter-spacing:-.01em;font-size:1.0625rem;font-weight:700;overflow:hidden}._calculator-history-item-delete{border-radius:calc(var(--calculator-btn-radius) - 2px);width:32px;height:32px;color:var(--calculator-text-secondary);cursor:pointer;background:0 0;border-width:0;flex-shrink:0;justify-content:center;align-items:center;margin-left:.625rem;padding:0;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex}._calculator-history-item-delete:hover{background:var(--calculator-bg-secondary);color:#ef4444;box-shadow:0 2px 6px #ef444433}._calculator-history-item-delete svg{width:14px;height:14px}@media (max-width:1024px){._calculator-history{width:100%;max-height:400px}._calculator-history:not(.hidden){display:flex}._calculator-history.hidden{display:none}}@media (max-width:640px){._calculator-history{max-height:350px}._calculator-history-header{padding:1rem}._calculator-history-title{font-size:1rem}._calculator-history-clear{padding:.4rem .75rem;font-size:.75rem}._calculator-history-list{padding:.75rem}._calculator-history-item{margin-bottom:.5rem;padding:.75rem .875rem}._calculator-history-item-expression{font-size:.875rem}._calculator-history-item-result{font-size:1rem}}