:root{--bg-color:#f8fafc;--surface-color:#fff;--surface-hover:#f1f5f9;--primary-color:#2563eb;--primary-hover:#1d4ed8;--text-primary:#0f172a;--text-secondary:#334155;--border-color:#e2e8f0;--safe-bottom:env(safe-area-inset-bottom,0px);--nav-height-mobile:calc(65px + var(--safe-bottom));--nav-width-desktop:250px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5;overflow:hidden}#app-container{flex-direction:column;width:100vw;height:100vh;display:flex}#main-content{padding-bottom:var(--nav-height-mobile);flex:1;position:relative;overflow-y:auto}#main-nav{background-color:var(--surface-color);border-top:1px solid var(--border-color);height:var(--nav-height-mobile);padding-bottom:var(--safe-bottom);z-index:100;justify-content:space-around;align-items:center;display:flex;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -2px 10px #00000005}.nav-brand{color:var(--text-primary);align-items:center;gap:.5rem;margin-bottom:1rem;padding:1.5rem;font-size:1.25rem;font-weight:700;display:none}.nav-brand svg{width:24px;height:24px;color:var(--primary-color)}.nav-btn{color:#94a3b8;cursor:pointer;background:0 0;border:none;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:4px;height:100%;transition:all .2s;display:flex}.nav-btn svg{width:24px;height:24px;transition:transform .2s cubic-bezier(.34,1.56,.64,1)}.nav-btn span{font-size:.75rem;font-weight:600}.nav-btn.active{color:var(--primary-color)}.nav-btn.active svg{transform:translateY(-2px)}.view{min-height:100%;padding:1.5rem 1.25rem;animation:.3s fadeIn;display:none}.view.active{flex-direction:column;display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.view-header{justify-content:space-between;align-items:center;margin-bottom:1.5rem;display:flex}.view-header h1{letter-spacing:-.5px;color:var(--text-primary);font-size:1.75rem;font-weight:800}.current-price-display{color:var(--text-secondary);margin-top:.25rem;font-size:.875rem}.current-price-display .price-value{color:var(--primary-color);margin-left:4px;font-weight:700}.premium-select{appearance:none;background-color:var(--surface-color);color:var(--text-primary);border:1px solid var(--border-color);cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-position:right .75rem center;background-repeat:no-repeat;background-size:16px;border-radius:20px;outline:none;padding:.5rem 2.25rem .5rem 1rem;font-size:.875rem;font-weight:600;transition:border-color .2s,box-shadow .2s;box-shadow:0 1px 2px #00000005}.premium-select:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #3b82f626}.premium-input{background-color:var(--surface-color);width:100%;color:var(--text-primary);border:1px solid var(--border-color);border-radius:12px;outline:none;padding:.875rem 1rem;font-size:1rem;transition:border-color .2s,box-shadow .2s;box-shadow:0 1px 2px #00000005}.premium-input:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #3b82f626}.premium-input::placeholder{color:#94a3b8}.input-group{gap:8px;display:flex}.input-group .premium-input{flex:1}.btn-primary{background-color:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:12px;padding:0 1.5rem;font-size:.9375rem;font-weight:600;transition:background-color .2s,transform .1s}.btn-primary:hover{background-color:var(--primary-hover)}.btn-primary:active{transform:scale(.97)}.btn-primary.success{background-color:#10b981}.security-text{color:#6b7280;margin-top:8px;font-size:.85rem}.tariff-details{color:#6b7280;margin-top:8px;font-size:.85rem;font-style:italic;display:none}.segmented-control{background:#e2e8f0;border-radius:12px;margin-bottom:1.5rem;padding:4px;display:flex;position:relative}.segmented-control input{display:none}.segmented-control label{text-align:center;z-index:1;cursor:pointer;color:var(--text-secondary);flex:1;padding:.6rem 1rem;font-size:.875rem;font-weight:600;transition:color .3s}.segmented-control input:checked+label{color:var(--text-primary)}.segmented-control-bg{background:var(--surface-color);border-radius:8px;width:calc(50% - 4px);transition:transform .3s cubic-bezier(.25,.8,.25,1);position:absolute;top:4px;bottom:4px;left:4px;box-shadow:0 1px 3px #0000001a}.segmented-control input:nth-of-type(2):checked~.segmented-control-bg{transform:translate(100%)}.segmented-control.three-items .segmented-control-bg{width:calc(33.333% - 2.66px)}.segmented-control.three-items input:first-of-type:checked~.segmented-control-bg{transform:translate(0)}.segmented-control.three-items input:nth-of-type(2):checked~.segmented-control-bg{transform:translate(100%)}.segmented-control.three-items input:nth-of-type(3):checked~.segmented-control-bg{transform:translate(200%)}.chart-container{background:var(--surface-color);border:1px solid var(--border-color);border-radius:16px;flex-direction:column;flex:1;width:100%;min-height:480px;padding:1rem;display:flex;position:relative;overflow:hidden;box-shadow:0 4px 6px -1px #0000000d}.chart-scroll-wrapper{-webkit-overflow-scrolling:touch;flex-grow:1;width:100%;height:100%;overflow:auto hidden}.chart-scroll-wrapper::-webkit-scrollbar{display:none}.chart-inner{width:100%;height:480px;position:relative}@media (width<=768px){.chart-inner{min-width:800px}}@media (width>=769px){.chart-container,.chart-inner{min-height:480px}}.chart-overlay{z-index:10;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);width:100%;height:100%;color:var(--text-secondary);text-align:center;background:#ffffffd9;border-radius:16px;justify-content:center;align-items:center;padding:1rem;font-weight:600;display:flex;position:absolute;top:0;left:0}.chart-overlay.hidden{display:none}.settings-form{flex-direction:column;gap:1.5rem;display:flex}.form-group{flex-direction:column;gap:.5rem;display:flex}.form-group label{color:var(--text-primary);font-size:.875rem;font-weight:700}.form-text{color:var(--text-secondary);margin-top:.25rem;font-size:.75rem}.form-section-title{color:var(--text-primary);margin-top:1rem;margin-bottom:-.5rem;font-size:1.125rem;font-weight:700}.settings-card{background:var(--surface-color);border:1px solid var(--border-color);border-radius:16px;overflow:hidden;box-shadow:0 1px 3px #0000000d}.setting-row{justify-content:space-between;align-items:center;padding:1rem 1.25rem;display:flex}.setting-divider{background:var(--border-color);height:1px;margin:0 1.25rem}.setting-info{flex-direction:column;gap:.25rem;display:flex}.setting-title{color:var(--text-primary);font-size:.9375rem;font-weight:600}.setting-desc{color:var(--text-secondary);font-size:.75rem}.mt-xl{margin-top:1.5rem}.toggle-switch{width:50px;height:28px;display:inline-block;position:relative}.toggle-switch input{opacity:0;width:0;height:0}.slider{cursor:pointer;background-color:#cbd5e1;border:1px solid #0000;border-radius:34px;transition:all .3s;position:absolute;inset:0}.slider:before{content:"";background-color:#fff;border-radius:50%;width:22px;height:22px;transition:all .3s cubic-bezier(.25,.8,.25,1);position:absolute;bottom:2px;left:3px;box-shadow:0 1px 2px #0003}input:checked+.slider{background-color:var(--primary-color)}input:checked+.slider:before{transform:translate(22px)}.placeholder-content{text-align:center;color:var(--text-secondary);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:1rem;display:flex}.placeholder-content svg{opacity:.5;width:48px;height:48px}.placeholder-content h2{color:var(--text-primary);font-size:1.25rem}.placeholder-content p{max-width:250px;font-size:.875rem}.total-summary{text-align:center;color:var(--text-primary);margin-top:16px;padding:0 1rem;font-size:1.1rem;font-weight:600}.app-version{text-align:center;color:var(--text-secondary);opacity:.6;pointer-events:none;padding:1rem 0 1.5rem;font-size:.75rem;font-weight:500}@media (width>=768px){#app-container{flex-direction:row}#main-content{padding-bottom:0}#main-nav{width:var(--nav-width-desktop);border-top:none;border-right:1px solid var(--border-color);height:100vh;box-shadow:none;flex-direction:column;justify-content:flex-start;align-items:flex-start;padding:0;position:static}.nav-brand{width:100%;display:flex}.nav-btn{border-left:3px solid #0000;flex-direction:row;flex:none;justify-content:flex-start;gap:1rem;width:100%;height:3.5rem;padding:0 1.5rem}.nav-btn:hover{color:var(--text-secondary);background:#f1f5f9}.nav-btn span{font-size:.9375rem}.nav-btn.active{border-left-color:var(--primary-color);background:#eff6ff}.nav-btn.active svg{transform:none}.view{width:100%;max-width:1000px;margin:0 auto;padding:2rem 3rem}}.segmented-control.four-items .segmented-control-bg{width:calc(25% - 2.66px)}.segmented-control.four-items input:first-of-type:checked~.segmented-control-bg{transform:translate(0)}.segmented-control.four-items input:nth-of-type(2):checked~.segmented-control-bg{transform:translate(100%)}.segmented-control.four-items input:nth-of-type(3):checked~.segmented-control-bg{transform:translate(200%)}.segmented-control.four-items input:nth-of-type(4):checked~.segmented-control-bg{transform:translate(300%)}