:root{color-scheme:light dark;--calc-bg: #ffffff;--calc-surface: #ffffff;--calc-border: rgba(0, 0, 0, .14);--calc-muted: rgba(0, 0, 0, .55);--calc-text: #111827;--calc-btn: rgba(0, 0, 0, .06);--calc-btn-hover: rgba(0, 0, 0, .1);--calc-accent: #10b981;--calc-display-bg: rgba(0, 0, 0, .05);--calc-shadow: 0 18px 50px rgba(0, 0, 0, .2);--calc-radius: 16px;--calc-font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial}@media(prefers-color-scheme:dark){:root{--calc-bg: #0f1012;--calc-surface: #1a1b1e;--calc-border: rgba(255, 255, 255, .1);--calc-text: rgba(255, 255, 255, .92);--calc-muted: rgba(255, 255, 255, .56);--calc-btn: rgba(255, 255, 255, .07);--calc-btn-hover: rgba(255, 255, 255, .11);--calc-display-bg: rgba(255, 255, 255, .05);--calc-shadow: 0 18px 50px rgba(0, 0, 0, .65);--calc-accent: #10b981}}.calc-fab{position:fixed;right:16px;bottom:16px;z-index:2147483647;width:52px;height:52px;border-radius:999px;border:1px solid var(--calc-border);background:var(--calc-surface);color:var(--calc-text);box-shadow:var(--calc-shadow);display:grid;place-items:center;cursor:pointer;-webkit-user-select:none;user-select:none;font-family:var(--calc-font);-webkit-tap-highlight-color:transparent}.calc-fab:active{transform:translateY(1px)}.calc-fab svg{width:22px;height:22px;opacity:.9}.calc-panel{position:fixed;right:16px;bottom:76px;z-index:2147483647;width:320px;border-radius:var(--calc-radius);border:1px solid var(--calc-border);background:var(--calc-surface);color:var(--calc-text);box-shadow:var(--calc-shadow);overflow:hidden;font-family:var(--calc-font);-webkit-tap-highlight-color:transparent}.calc-panel[hidden]{display:none}.calc-header{display:flex;align-items:center;gap:2px;padding:10px 12px;border-bottom:1px solid var(--calc-border)}.calc-title{font-weight:800;letter-spacing:.2px}.calc-spacer{flex:1}.calc-close{border:1px solid var(--calc-border);background:transparent;color:var(--calc-text);border-radius:10px;padding:6px 10px;cursor:pointer}.calc-display{padding:12px;border-bottom:1px solid var(--calc-border);position:relative}.calc-history-row{display:flex;align-items:center;gap:8px;min-height:24px;padding:0 4px 6px}.calc-icon-btn{background:transparent;border:none;color:var(--calc-muted);cursor:pointer;padding:4px;border-radius:6px;display:grid;place-items:center;flex-shrink:0}.calc-icon-btn:hover{background:var(--calc-btn-hover);color:var(--calc-text)}.calc-icon-btn svg{width:18px;height:18px}.calc-settings-btn svg{width:18px;height:18px}.calc-history-text{flex:1;color:var(--calc-muted);font-size:13px;text-align:right}.calc-history-sheet{position:absolute;left:0;right:0;bottom:0;background:var(--calc-surface);border-top:1px solid var(--calc-border);border-radius:16px 16px 0 0;box-shadow:0 -4px 20px #00000026;z-index:10;max-height:280px;overflow:hidden;display:flex;flex-direction:column;transform:translateY(100%);opacity:0;visibility:hidden;transition:transform .25s cubic-bezier(.4,0,.2,1),opacity .25s cubic-bezier(.4,0,.2,1),visibility .25s}.calc-history-sheet.is-open{transform:translateY(0);opacity:1;visibility:visible}.calc-history-sheet-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--calc-border);font-weight:700;font-size:14px}.calc-history-sheet-actions{display:flex;align-items:center;gap:8px}.calc-history-clear{background:transparent;border:1px solid var(--calc-border);color:var(--calc-muted);border-radius:8px;padding:4px 10px;font-size:12px;cursor:pointer}.calc-history-clear:hover{color:var(--calc-text);background:var(--calc-btn-hover)}.calc-history-close{background:transparent;border:1px solid var(--calc-border);color:var(--calc-muted);border-radius:8px;padding:4px 10px;cursor:pointer;display:grid;place-items:center}.calc-history-close:hover{color:var(--calc-text);background:var(--calc-btn-hover)}.calc-history-close svg{width:16px;height:16px}.calc-history-list{flex:1;overflow-y:auto;padding:8px 0}.calc-settings-sheet{position:absolute;left:0;right:0;bottom:0;background:var(--calc-surface);border-top:1px solid var(--calc-border);border-radius:16px 16px 0 0;box-shadow:0 -4px 20px #00000026;z-index:11;overflow:hidden;display:flex;flex-direction:column;transform:translateY(100%);opacity:0;visibility:hidden;transition:transform .25s cubic-bezier(.4,0,.2,1),opacity .25s cubic-bezier(.4,0,.2,1),visibility .25s}.calc-settings-sheet.is-open{transform:translateY(0);opacity:1;visibility:visible}.calc-settings-sheet-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--calc-border);font-weight:700;font-size:14px}.calc-settings-close{background:transparent;border:1px solid var(--calc-border);color:var(--calc-muted);border-radius:8px;padding:4px 10px;font-size:12px;cursor:pointer}.calc-settings-close:hover{color:var(--calc-text);background:var(--calc-btn-hover)}.calc-settings-body{padding:12px 16px 16px;display:grid;gap:12px}.calc-settings-row{display:grid;gap:6px;font-size:13px;color:var(--calc-muted)}.calc-settings-row-inline{display:flex;align-items:center;justify-content:space-between;gap:12px}.calc-settings-row-box{border:1px solid var(--calc-border);border-radius:10px;padding:8px 10px;background:var(--calc-surface)}.calc-settings-label{color:var(--calc-text);font-weight:600}.calc-settings-thousands{width:100%;border:1px solid var(--calc-border);border-radius:10px;padding:8px 10px;background:var(--calc-display-bg);color:var(--calc-text);font-size:13px;font-family:var(--calc-font);outline:none}.calc-settings-stepper{display:inline-flex;align-items:center;gap:8px}.calc-settings-decimals-minus,.calc-settings-decimals-plus{border:1px solid var(--calc-border);background:transparent;color:var(--calc-text);border-radius:8px;padding:4px 10px;font-size:14px;cursor:pointer}.calc-settings-decimals-minus:hover,.calc-settings-decimals-plus:hover{background:var(--calc-btn-hover)}.calc-settings-decimals-value{min-width:24px;text-align:center;font-weight:700;color:var(--calc-text)}.calc-settings-switch{position:relative;display:inline-flex;align-items:center;width:44px;height:24px}.calc-settings-thousands{appearance:none;-webkit-appearance:none;width:44px;height:24px;margin:0;border:1px solid var(--calc-border);border-radius:999px;background:var(--calc-display-bg);cursor:pointer;transition:background .2s ease,border-color .2s ease}.calc-settings-slider{position:absolute;left:3px;width:18px;height:18px;border-radius:50%;background:var(--calc-text);pointer-events:none;transition:transform .2s ease}.calc-settings-thousands:checked{background:color-mix(in srgb,var(--calc-accent) 15%,var(--calc-display-bg));border-color:color-mix(in srgb,var(--calc-accent) 30%,var(--calc-border))}.calc-settings-thousands:checked+.calc-settings-slider{transform:translate(20px)}.calc-history-item{display:flex;align-items:center;justify-content:space-between;width:100%;padding:10px 16px;background:transparent;border:none;color:var(--calc-text);cursor:pointer;text-align:left;font-family:var(--calc-font)}.calc-history-item:hover{background:var(--calc-btn-hover)}.calc-history-item-expr{color:var(--calc-muted);font-size:13px}.calc-history-item-result{font-weight:700;font-size:15px}.calc-history-empty{padding:20px 16px;text-align:center;color:var(--calc-muted);font-size:13px}.calc-expr{width:100%;border:1px solid var(--calc-border);border-radius:12px;padding:10px 12px;background:var(--calc-display-bg);color:var(--calc-text);font-size:18px;font-weight:600;text-align:right;outline:none;white-space:nowrap;overflow-x:auto;scrollbar-width:thin}.calc-expr::-webkit-scrollbar{height:6px}@media(max-width:420px){.calc-expr{font-size:16px}}.calc-secondary-keys{padding:8px 12px 0;display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.calc-key.calc-key-secondary{padding:8px 0;font-size:14px;border-radius:10px;opacity:.85}.calc-key.calc-key-secondary:hover{opacity:1}.calc-keys{padding:12px;display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.calc-key{border:1px solid var(--calc-border);background:var(--calc-btn);color:var(--calc-text);border-radius:14px;padding:12px 0;font-size:16px;font-weight:800;cursor:pointer;-webkit-user-select:none;user-select:none}.calc-key:hover{background:var(--calc-btn-hover)}.calc-key:active{transform:translateY(1px)}.calc-key.zero{grid-column:span 2}.calc-key.op{background:color-mix(in srgb,var(--calc-btn) 55%,var(--calc-accent) 10%)}.calc-key.eq{background:var(--calc-accent);color:#062018;border-color:color-mix(in srgb,var(--calc-accent) 75%,var(--calc-border))}.calc-key.danger{background:color-mix(in srgb,#ef4444 18%,var(--calc-btn));border-color:color-mix(in srgb,#ef4444 25%,var(--calc-border))}@media(max-width:420px){.calc-panel{width:calc(100vw - 24px);right:12px}.calc-fab{right:12px;bottom:12px}}.calc-header{cursor:grab;user-select:none;-webkit-user-select:none}.calc-header:active{cursor:grabbing}.calc-panel.is-dragging,.calc-fab.is-dragging{user-select:none;-webkit-user-select:none}