:root{--bg-gradient: radial-gradient(circle at 50% 0%, #1e1b4b 0%, #0f172a 60%, #020617 100%);--glow-color: rgba(99, 102, 241, .25);--card-bg: rgba(15, 23, 42, .75);--card-border: rgba(255, 255, 255, .12);--glass-shadow: 0 25px 50px -12px rgba(0, 0, 0, .5);--text-main: #f8fafc;--text-muted: #94a3b8;--text-sub: #cbd5e1;--display-bg: rgba(2, 6, 23, .6);--display-border: rgba(255, 255, 255, .08);--btn-num-bg: rgba(30, 41, 59, .7);--btn-num-hover: rgba(51, 65, 85, .85);--btn-num-text: #f1f5f9;--btn-op-bg: rgba(99, 102, 241, .2);--btn-op-hover: rgba(99, 102, 241, .35);--btn-op-text: #818cf8;--btn-sci-bg: rgba(51, 65, 85, .4);--btn-sci-hover: rgba(71, 85, 105, .6);--btn-sci-text: #38bdf8;--btn-func-bg: rgba(239, 68, 68, .18);--btn-func-hover: rgba(239, 68, 68, .32);--btn-func-text: #f87171;--btn-equals-bg: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);--btn-equals-hover: linear-gradient(135deg, #4f46e5 0%, #4338ca 100%);--btn-equals-text: #ffffff;--btn-equals-shadow: 0 4px 20px rgba(99, 102, 241, .4);--accent-color: #6366f1;--accent-light: #a5b4fc;--radius-xl: 24px;--radius-lg: 16px;--radius-md: 12px;--radius-sm: 8px;--font-main: "Plus Jakarta Sans", sans-serif;--font-mono: "Fira Code", monospace}[data-theme=cyberpunk]{--bg-gradient: radial-gradient(circle at 50% 10%, #2a0845 0%, #0d001a 70%, #05000a 100%);--glow-color: rgba(255, 0, 128, .3);--card-bg: rgba(18, 2, 28, .85);--card-border: rgba(255, 0, 128, .3);--text-main: #00ffff;--text-muted: #ff007f;--text-sub: #e0e7ff;--display-bg: rgba(10, 0, 20, .9);--display-border: rgba(0, 255, 255, .3);--btn-num-bg: rgba(40, 10, 60, .8);--btn-num-hover: rgba(70, 15, 100, .9);--btn-num-text: #ffffff;--btn-op-bg: rgba(0, 255, 255, .15);--btn-op-hover: rgba(0, 255, 255, .3);--btn-op-text: #00ffff;--btn-sci-bg: rgba(255, 0, 128, .15);--btn-sci-hover: rgba(255, 0, 128, .3);--btn-sci-text: #ff66cc;--btn-func-bg: rgba(255, 170, 0, .2);--btn-func-hover: rgba(255, 170, 0, .4);--btn-func-text: #ffaa00;--btn-equals-bg: linear-gradient(135deg, #ff007f 0%, #7928ca 100%);--btn-equals-hover: linear-gradient(135deg, #e00070 0%, #6820b0 100%);--btn-equals-text: #ffffff;--btn-equals-shadow: 0 4px 20px rgba(255, 0, 128, .6);--accent-color: #ff007f;--accent-light: #00ffff}[data-theme=luxury-gold]{--bg-gradient: radial-gradient(circle at 50% 0%, #1c1917 0%, #0c0a09 70%, #000000 100%);--glow-color: rgba(217, 119, 6, .25);--card-bg: rgba(28, 25, 23, .85);--card-border: rgba(217, 119, 6, .3);--text-main: #fef3c7;--text-muted: #d97706;--text-sub: #f59e0b;--display-bg: rgba(12, 10, 9, .9);--display-border: rgba(217, 119, 6, .25);--btn-num-bg: rgba(44, 40, 37, .8);--btn-num-hover: rgba(68, 62, 57, .9);--btn-num-text: #fffbeb;--btn-op-bg: rgba(217, 119, 6, .2);--btn-op-hover: rgba(217, 119, 6, .35);--btn-op-text: #fbbf24;--btn-sci-bg: rgba(120, 53, 15, .3);--btn-sci-hover: rgba(146, 64, 14, .5);--btn-sci-text: #fde68a;--btn-func-bg: rgba(185, 28, 28, .2);--btn-func-hover: rgba(185, 28, 28, .4);--btn-func-text: #fca5a5;--btn-equals-bg: linear-gradient(135deg, #d97706 0%, #b45309 100%);--btn-equals-hover: linear-gradient(135deg, #b45309 0%, #92400e 100%);--btn-equals-text: #ffffff;--btn-equals-shadow: 0 4px 20px rgba(217, 119, 6, .5);--accent-color: #f59e0b;--accent-light: #fde68a}[data-theme=light-crystal]{--bg-gradient: radial-gradient(circle at 50% 0%, #e0f2fe 0%, #f1f5f9 60%, #cbd5e1 100%);--glow-color: rgba(14, 165, 233, .15);--card-bg: rgba(255, 255, 255, .85);--card-border: rgba(255, 255, 255, .6);--glass-shadow: 0 20px 40px rgba(148, 163, 184, .25);--text-main: #0f172a;--text-muted: #64748b;--text-sub: #334155;--display-bg: rgba(248, 250, 252, .9);--display-border: rgba(203, 213, 225, .6);--btn-num-bg: rgba(241, 245, 249, .9);--btn-num-hover: rgba(226, 232, 240, 1);--btn-num-text: #1e293b;--btn-op-bg: rgba(14, 165, 233, .12);--btn-op-hover: rgba(14, 165, 233, .22);--btn-op-text: #0284c7;--btn-sci-bg: rgba(100, 116, 139, .12);--btn-sci-hover: rgba(100, 116, 139, .22);--btn-sci-text: #334155;--btn-func-bg: rgba(239, 68, 68, .1);--btn-func-hover: rgba(239, 68, 68, .2);--btn-func-text: #dc2626;--btn-equals-bg: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);--btn-equals-hover: linear-gradient(135deg, #0369a1 0%, #075985 100%);--btn-equals-text: #ffffff;--btn-equals-shadow: 0 4px 16px rgba(2, 132, 199, .35);--accent-color: #0284c7;--accent-light: #38bdf8}*{margin:0;padding:0;box-sizing:border-box;user-select:none;-webkit-user-select:none;font-family:var(--font-main);transition:background-color .25s ease,color .25s ease,border-color .25s ease,box-shadow .25s ease}body{min-height:100vh;background:var(--bg-gradient);color:var(--text-main);display:flex;justify-content:center;align-items:center;padding:20px;overflow-x:hidden;position:relative}.background-glow{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:600px;height:600px;background:var(--glow-color);filter:blur(120px);border-radius:50%;pointer-events:none;z-index:0}.app-container{width:100%;max-width:520px;position:relative;z-index:1}.app-header{display:flex;flex-direction:column;gap:12px;margin-bottom:16px}.logo-area{display:flex;align-items:center;gap:10px;justify-content:space-between}.logo-icon{width:38px;height:38px;background:var(--btn-equals-bg);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;box-shadow:var(--btn-equals-shadow)}.logo-text h1{font-size:1.35rem;font-weight:700;letter-spacing:-.5px;display:flex;align-items:center;gap:8px}.badge-pro{font-size:.65rem;font-weight:800;background:var(--accent-color);color:#fff;padding:2px 8px;border-radius:20px;letter-spacing:1px;text-transform:uppercase}.header-actions{display:flex;align-items:center;gap:8px;margin-left:auto}.icon-btn{width:38px;height:38px;border-radius:var(--radius-md);border:1px solid var(--card-border);background:var(--card-bg);color:var(--text-main);display:flex;align-items:center;justify-content:center;cursor:pointer;position:relative;font-size:.95rem}.icon-btn:hover{background:var(--btn-num-hover);transform:translateY(-2px)}.badge{position:absolute;top:-4px;right:-4px;background:var(--accent-color);color:#fff;font-size:.65rem;font-weight:700;min-width:18px;height:18px;border-radius:9px;display:flex;align-items:center;justify-content:center;padding:0 4px}.mode-tabs{display:flex;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-lg);padding:4px;gap:4px;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);overflow-x:auto;scrollbar-width:none}.mode-tabs::-webkit-scrollbar{display:none}.tab-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:8px 12px;border:none;background:transparent;color:var(--text-muted);font-size:.82rem;font-weight:600;border-radius:var(--radius-md);cursor:pointer;white-space:nowrap}.tab-btn:hover{color:var(--text-main)}.tab-btn.active{background:var(--btn-equals-bg);color:#fff;box-shadow:var(--btn-equals-shadow)}.theme-dropdown-container{position:relative}.theme-menu{position:absolute;top:46px;right:0;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-md);padding:6px;min-width:170px;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);box-shadow:var(--glass-shadow);z-index:100;display:flex;flex-direction:column;gap:4px}.theme-menu.hidden{display:none}.theme-option{display:flex;align-items:center;gap:10px;padding:8px 10px;background:transparent;border:none;color:var(--text-main);font-size:.85rem;font-weight:500;border-radius:var(--radius-sm);cursor:pointer;text-align:left}.theme-option:hover{background:var(--btn-num-hover)}.theme-dot{width:12px;height:12px;border-radius:50%}.theme-dot.dark-glass{background:#6366f1}.theme-dot.cyberpunk{background:#ff007f}.theme-dot.luxury-gold{background:#f59e0b}.theme-dot.light-crystal{background:#0284c7}.calculator-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-xl);padding:20px;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);box-shadow:var(--glass-shadow);display:flex;flex-direction:column;gap:16px}.display-screen{background:var(--display-bg);border:1px solid var(--display-border);border-radius:var(--radius-lg);padding:16px;display:flex;flex-direction:column;justify-content:space-between;min-height:110px;position:relative;overflow:hidden}.display-screen.shake{animation:shakeAnimation .3s ease-in-out}@keyframes shakeAnimation{0%,to{transform:translate(0)}20%,60%{transform:translate(-6px)}40%,80%{transform:translate(6px)}}.display-top{display:flex;justify-content:space-between;align-items:flex-start;min-height:24px}.indicators{display:flex;gap:6px}.indicator-pill{font-size:.65rem;font-weight:700;padding:2px 6px;border-radius:4px;background:var(--btn-op-bg);color:var(--accent-light);border:1px solid var(--card-border);text-transform:uppercase}.indicator-pill.hidden{display:none}.expression-line{font-family:var(--font-mono);font-size:.95rem;color:var(--text-muted);text-align:right;word-break:break-all;max-width:100%;overflow-x:auto;scrollbar-width:none}.expression-line::-webkit-scrollbar{display:none}.display-bottom{text-align:right;margin-top:4px}.result-line{font-family:var(--font-mono);font-size:2.2rem;font-weight:700;color:var(--text-main);letter-spacing:-.5px;word-break:break-all;line-height:1.1}.display-actions{position:absolute;bottom:8px;left:12px;display:flex;gap:6px;opacity:.7}.display-actions:hover{opacity:1}.action-sm-btn{background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:4px;font-size:.85rem;border-radius:4px}.action-sm-btn:hover{color:var(--text-main);background:var(--btn-num-hover)}.keypad-view{display:none;flex-direction:column;gap:12px}.keypad-view.active{display:flex}.memory-bar{display:flex;gap:6px}.btn-mem{flex:1;padding:6px 0;font-size:.75rem;font-weight:700;background:var(--btn-sci-bg);color:var(--btn-sci-text);border:1px solid var(--card-border);border-radius:var(--radius-sm);cursor:pointer}.btn-mem:hover{background:var(--btn-sci-hover)}.key-grid{display:grid;gap:8px}.standard-grid{grid-template-columns:repeat(4,1fr)}.scientific-grid{grid-template-columns:repeat(6,1fr)}.btn{height:52px;border-radius:var(--radius-md);border:1px solid var(--card-border);font-size:1.15rem;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;transition:transform .08s ease,background-color .15s ease,box-shadow .15s ease}.btn:active,.btn.pressed{transform:scale(.94)}.btn-num{background:var(--btn-num-bg);color:var(--btn-num-text)}.btn-num:hover{background:var(--btn-num-hover)}.btn-op{background:var(--btn-op-bg);color:var(--btn-op-text);font-size:1.25rem}.btn-op:hover{background:var(--btn-op-hover)}.btn-sci{background:var(--btn-sci-bg);color:var(--btn-sci-text);font-size:.9rem;font-weight:500}.btn-sci:hover{background:var(--btn-sci-hover)}.btn-func{background:var(--btn-func-bg);color:var(--btn-func-text);font-weight:700}.btn-func:hover{background:var(--btn-func-hover)}.btn-equals{background:var(--btn-equals-bg);color:var(--btn-equals-text);font-size:1.4rem;font-weight:700;box-shadow:var(--btn-equals-shadow)}.btn-equals:hover{background:var(--btn-equals-hover)}.grid-span-all{grid-column:1 / -1;height:46px}.tool-view{display:none;flex-direction:column;gap:16px}.tool-view.active{display:flex}.tool-header{display:flex;justify-content:space-between;align-items:center}.tool-header h3{font-size:1.05rem;font-weight:700;display:flex;align-items:center;gap:8px}.custom-select{background:var(--display-bg);color:var(--text-main);border:1px solid var(--card-border);padding:8px 12px;border-radius:var(--radius-md);font-size:.88rem;font-weight:600;outline:none;cursor:pointer;width:100%}.custom-select option{background:#0f172a;color:#fff}.converter-box{background:var(--display-bg);border:1px solid var(--display-border);border-radius:var(--radius-lg);padding:16px;display:flex;flex-direction:column;gap:12px}.converter-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;align-items:center}.input-group label{font-size:.75rem;color:var(--text-muted);margin-bottom:4px;display:block;font-weight:600}.tool-input{width:100%;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-md);padding:10px 12px;color:var(--text-main);font-size:1.1rem;font-family:var(--font-mono);outline:none}.tool-input:focus{border-color:var(--accent-color)}.swap-row{display:flex;justify-content:center}.swap-btn{width:36px;height:36px;border-radius:50%;background:var(--btn-op-bg);color:var(--btn-op-text);border:1px solid var(--card-border);cursor:pointer;display:flex;align-items:center;justify-content:center}.swap-btn:hover{background:var(--btn-op-hover);transform:rotate(180deg)}.formula-info{font-size:.8rem;color:var(--text-muted);text-align:center;font-style:italic;margin-top:4px}.form-group{display:flex;flex-direction:column;gap:6px;margin-bottom:12px}.form-group label{font-size:.85rem;font-weight:600;color:var(--text-sub)}.input-with-icon{position:relative}.input-with-icon i{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-muted)}.input-with-icon .tool-input{padding-left:36px}.preset-buttons{display:flex;gap:8px}.preset-btn{flex:1;padding:8px;background:var(--btn-num-bg);color:var(--text-main);border:1px solid var(--card-border);border-radius:var(--radius-md);font-size:.88rem;font-weight:600;cursor:pointer}.preset-btn.active{background:var(--btn-equals-bg);color:#fff;border-color:transparent}.counter-input{display:flex;align-items:center;gap:8px}.counter-btn{width:42px;height:42px;background:var(--btn-sci-bg);color:var(--text-main);border:1px solid var(--card-border);border-radius:var(--radius-md);font-size:1.2rem;font-weight:700;cursor:pointer}.counter-btn:hover{background:var(--btn-sci-hover)}.mt-2{margin-top:8px}.text-center{text-align:center}.results-summary{background:var(--display-bg);border:1px solid var(--display-border);border-radius:var(--radius-lg);padding:16px;display:flex;flex-direction:column;gap:12px}.result-card.highlight{background:var(--btn-op-bg);border:1px solid var(--card-border);border-radius:var(--radius-md);padding:12px 16px;display:flex;justify-content:space-between;align-items:center}.result-card.success{background:#10b98126;border-color:#10b9814d}.res-title{font-size:.9rem;font-weight:600;color:var(--text-sub)}.res-amount{font-family:var(--font-mono);font-size:1.5rem;font-weight:700;color:var(--text-main)}.result-details{display:flex;flex-direction:column;gap:6px;font-size:.85rem}.res-row{display:flex;justify-content:space-between;color:var(--text-muted)}.res-row strong{color:var(--text-main);font-family:var(--font-mono)}.text-success{color:#10b981!important}.history-drawer{position:fixed;top:0;right:-360px;width:340px;height:100vh;background:var(--card-bg);border-left:1px solid var(--card-border);backdrop-filter:blur(28px);-webkit-backdrop-filter:blur(28px);z-index:200;padding:20px;display:flex;flex-direction:column;gap:16px;transition:right .3s cubic-bezier(.16,1,.3,1);box-shadow:-10px 0 30px #00000080}.history-drawer.open{right:0}.drawer-header{display:flex;justify-content:space-between;align-items:center}.drawer-header h2{font-size:1.15rem;font-weight:700;display:flex;align-items:center;gap:8px}.drawer-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:150;opacity:0;pointer-events:none;transition:opacity .3s ease}.drawer-overlay.active{opacity:1;pointer-events:auto}.history-controls{display:flex;justify-content:flex-end}.btn-sm{padding:6px 12px;font-size:.8rem;font-weight:600;border-radius:var(--radius-sm);border:none;cursor:pointer;display:flex;align-items:center;gap:6px}.btn-danger{background:var(--btn-func-bg);color:var(--btn-func-text)}.btn-danger:hover{background:var(--btn-func-hover)}.history-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding-right:4px}.history-item{background:var(--display-bg);border:1px solid var(--display-border);border-radius:var(--radius-md);padding:10px 12px;cursor:pointer;display:flex;flex-direction:column;gap:4px;transition:transform .15s ease,border-color .15s ease}.history-item:hover{border-color:var(--accent-color);transform:translate(-3px)}.history-expr{font-family:var(--font-mono);font-size:.82rem;color:var(--text-muted);word-break:break-all}.history-res{font-family:var(--font-mono);font-size:1.15rem;font-weight:700;color:var(--text-main);text-align:right}.empty-history{display:flex;flex-direction:column;align-items:center;justify-content:center;height:200px;color:var(--text-muted);gap:12px}.empty-history i{font-size:2.5rem;opacity:.4}.toast-container{position:fixed;bottom:24px;left:50%;transform:translate(-50%);display:flex;flex-direction:column;gap:8px;z-index:300;pointer-events:none}.toast{background:#0f172a;color:#fff;border:1px solid var(--accent-color);padding:10px 18px;border-radius:30px;font-size:.85rem;font-weight:600;box-shadow:0 10px 25px #0006;display:flex;align-items:center;gap:8px;animation:toastIn .3s cubic-bezier(.16,1,.3,1),toastOut .3s cubic-bezier(.7,0,.84,0) 2.2s forwards}@keyframes toastIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes toastOut{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(20px)}}.app-footer{text-align:center;font-size:.8rem;color:var(--text-muted);margin-top:14px;font-weight:500;opacity:.85}@media (max-width: 480px){body{padding:10px}.app-container{max-width:100%}.calculator-card{padding:14px;border-radius:var(--radius-lg)}.scientific-grid{grid-template-columns:repeat(5,1fr)}.btn{height:46px;font-size:1rem}.result-line{font-size:1.8rem}.history-drawer{width:100vw;right:-100vw}}