@keyframes shakeError{0%,to{transform:translateX(0)}20%{transform:translateX(-6px)}40%{transform:translateX(6px)}60%{transform:translateX(-3px)}80%{transform:translateX(3px)}}@keyframes slideIn{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}:root{--accent-color:#0071E3;--accent-hover:#0077ED;--accent-active:#0068D0;--accent-light:#5AC8FA;--accent-ultra-light:rgba(0, 113, 227, 0.08);--accent-gradient:linear-gradient(180deg, #0077ED 0%, #0071E3 100%);--system-green:#30D158;--system-green-dark:#28A745;--system-orange:#FF9F0A;--system-red:#FF453A;--system-purple:#BF5AF2;--gray-50:#FAFAFA;--gray-100:#F5F5F7;--gray-200:#E8E8ED;--gray-300:#D2D2D7;--gray-400:#AEAEB2;--gray-500:#8E8E93;--gray-600:#636366;--gray-700:#48484A;--gray-800:#3A3A3C;--gray-900:#1D1D1F;--gray-950:#141414;--bg-primary:#FFFFFF;--bg-secondary:var(--gray-100);--bg-tertiary:var(--gray-200);--bg-card:rgba(255, 255, 255, 0.72);--bg-card-solid:#FFFFFF;--bg-elevated:rgba(255, 255, 255, 0.9);--text-primary:var(--gray-900);--text-secondary:var(--gray-600);--text-tertiary:var(--gray-500);--text-quaternary:var(--gray-400);--border-color:rgba(0, 0, 0, 0.08);--border-color-strong:rgba(0, 0, 0, 0.12);--border-focus:rgba(0, 113, 227, 0.4);--shadow-xs:0 1px 2px rgba(0, 0, 0, 0.04);--shadow-sm:0 2px 8px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);--shadow-md:0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);--shadow-lg:0 8px 32px rgba(0, 0, 0, 0.12), 0 4px 8px rgba(0, 0, 0, 0.04);--shadow-xl:0 16px 48px rgba(0, 0, 0, 0.16), 0 8px 16px rgba(0, 0, 0, 0.08);--shadow-glow:0 0 0 4px rgba(0, 113, 227, 0.15);--font-primary:'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', system-ui, sans-serif;--font-weight-regular:400;--font-weight-medium:500;--font-weight-semibold:600;--font-weight-bold:700;--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-16:4rem;--space-20:5rem;--space-24:6rem;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px;--radius-2xl:24px;--radius-full:9999px;--ease-out:cubic-bezier(0.16, 1, 0.3, 1);--ease-in-out:cubic-bezier(0.45, 0, 0.55, 1);--duration-fast:150ms;--duration-normal:250ms;--duration-slow:400ms;--blur-sm:blur(8px);--blur-md:blur(20px);--blur-lg:blur(40px)}body:not(.light-mode){--bg-primary:#000000;--bg-secondary:#1C1C1E;--bg-tertiary:#2C2C2E;--bg-card:rgba(28, 28, 30, 0.72);--bg-card-solid:#1C1C1E;--bg-elevated:rgba(44, 44, 46, 0.9);--text-primary:#F5F5F7;--text-secondary:#A1A1A6;--text-tertiary:#8E8E93;--text-quaternary:#636366;--border-color:rgba(255, 255, 255, 0.08);--border-color-strong:rgba(255, 255, 255, 0.12);--shadow-sm:0 2px 8px rgba(0, 0, 0, 0.3);--shadow-md:0 4px 16px rgba(0, 0, 0, 0.4);--shadow-lg:0 8px 32px rgba(0, 0, 0, 0.5);--shadow-xl:0 16px 48px rgba(0, 0, 0, 0.6)}*,::after,::before{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-primary);font-weight:var(--font-weight-regular);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.5;min-height:100vh;min-height:100dvh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;transition:background-color var(--duration-normal) var(--ease-out),color var(--duration-normal) var(--ease-out)}body::before{content:"";position:fixed;inset:0;background:radial-gradient(ellipse 80% 50%at 50% -20%,rgba(0,113,227,.03),transparent);pointer-events:none;z-index:-1}body:not(.light-mode)::before{background:radial-gradient(ellipse 80% 50%at 50% -20%,rgba(0,113,227,.08),transparent)}.t-no-transition,.t-no-transition *,.t-no-transition ::after,.t-no-transition ::before{transition:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}:focus-visible{outline:2px solid var(--accent-color);outline-offset:2px}:focus:not(:focus-visible){outline:0}.container{width:100%;max-width:980px;margin:0 auto;padding:0 var(--space-6)}@media (min-width:1200px){.container{max-width:1120px}}h1,h2,h3,h4,h5,h6{font-weight:var(--font-weight-semibold);line-height:1.1;letter-spacing:-.02em;color:var(--text-primary)}h1{font-size:clamp(2.5rem,6vw,4rem)}h2{font-size:clamp(1.75rem,4vw,2.5rem)}h3{font-size:clamp(1.25rem,3vw,1.75rem)}h4{font-size:1.25rem}p{color:var(--text-secondary);line-height:1.6}.header{position:sticky;top:0;z-index:100;background:var(--bg-card);backdrop-filter:var(--blur-md);-webkit-backdrop-filter:var(--blur-md);border-bottom:1px solid var(--border-color);padding:var(--space-4)0;transition:background-color var(--duration-normal) var(--ease-out),border-color var(--duration-normal) var(--ease-out)}.header .container{justify-content:space-between}.header .container,.logo{display:flex;align-items:center}.logo-image{height:44px;width:auto;transition:opacity var(--duration-fast) var(--ease-out)}.logo-image:hover{opacity:.8}.theme-toggle{position:relative;width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-full);cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.theme-toggle:hover{background:var(--bg-tertiary);transform:scale(1.05)}.theme-toggle:active{transform:scale(.95)}.theme-icon{position:absolute;font-size:1.125rem;transition:all var(--duration-normal) var(--ease-out)}.light-mode .theme-icon-light{opacity:1;transform:rotate(0deg) scale(1);color:#ff9500}.light-mode .theme-icon-dark{opacity:0;transform:rotate(180deg) scale(.5)}body:not(.light-mode) .theme-icon-dark{opacity:1;transform:rotate(0deg) scale(1);color:#0a84ff}body:not(.light-mode) .theme-icon-light{opacity:0;transform:rotate(-180deg) scale(.5)}.main{padding:var(--space-12)0 var(--space-4)}@media (max-width:768px){.main{padding:var(--space-8)0 var(--space-3)}}.hero{text-align:center;margin-bottom:var(--space-12);padding:var(--space-8)0}.hero-title{font-size:clamp(1.75rem,4.5vw,2.75rem);font-weight:var(--font-weight-bold);letter-spacing:-.02em;line-height:1.1;margin-bottom:var(--space-4);color:#1877f2}body:not(.light-mode) .hero-title{color:#1877f2}.hero-subtitle{font-size:clamp(1rem,2.5vw,1.375rem);color:var(--text-secondary);max-width:600px;margin:0 auto;line-height:1.5;font-weight:var(--font-weight-regular)}.card{background:var(--bg-card);backdrop-filter:var(--blur-md);-webkit-backdrop-filter:var(--blur-md);border:1px solid var(--border-color);border-radius:var(--radius-2xl);padding:var(--space-10);margin-bottom:var(--space-8);box-shadow:var(--shadow-sm);transition:all var(--duration-normal) var(--ease-out)}.card:hover{box-shadow:var(--shadow-md);border-color:var(--border-color-strong)}@media (max-width:768px){.card{padding:var(--space-6);border-radius:var(--radius-xl)}}.card-header{margin-bottom:var(--space-8);text-align:center}.card-title{display:flex;align-items:center;justify-content:center;gap:var(--space-3);font-size:1.5rem;font-weight:var(--font-weight-semibold);margin-bottom:var(--space-2);color:var(--text-primary)}.card-title .bi,.form-label .bi{color:var(--accent-color);font-size:1.5rem}.card-subtitle{color:var(--text-secondary);font-size:1rem}.bi{display:inline-flex;align-items:center;justify-content:center;line-height:1;vertical-align:middle}.calculator-form{width:100%}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--space-6);margin-bottom:var(--space-8)}@media (min-width:768px){.form-grid{grid-template-columns:repeat(2,1fr);gap:var(--space-8)}}@media (min-width:1024px){.form-grid{grid-template-columns:repeat(3,1fr)}}.form-group,.form-label{display:flex;gap:var(--space-2)}.form-group{flex-direction:column}.form-label{align-items:center;font-size:.875rem;font-weight:var(--font-weight-medium);color:var(--text-primary)}.form-label .bi{font-size:1rem}.currency-symbol{width:1em;height:1em;display:inline-flex;align-items:center;justify-content:center;vertical-align:middle;margin-right:.25rem;flex-shrink:0}.light-mode .currency-symbol{filter:invert(27%) sepia(100%) saturate(2000%) hue-rotate(200deg) brightness(95%) contrast(101%)}body:not(.light-mode) .currency-symbol{filter:invert(50%) sepia(80%) saturate(2500%) hue-rotate(200deg) brightness(105%) contrast(98%)}.form-input{transition:all var(--duration-fast) var(--ease-out)}.form-input,.form-select{width:100%;padding:var(--space-4);font-size:1rem;font-family:inherit;color:var(--text-primary);background:var(--bg-card-solid);border:1px solid var(--border-color-strong);border-radius:var(--radius-md);-webkit-appearance:none;appearance:none}.form-input::placeholder{color:var(--text-quaternary)}.form-input:hover,.form-select:hover{border-color:var(--text-quaternary)}.form-input:focus,.form-select:focus{outline:0;border-color:var(--accent-color);box-shadow:var(--shadow-glow)}.light-mode .form-input,.light-mode .form-select{background-color:#fff;color:var(--text-primary);border-color:var(--border-color-strong)}body:not(.light-mode) .form-input,body:not(.light-mode) .form-select{background-color:#1c1c1e;color:var(--text-primary);border-color:var(--border-color-strong)}.form-select,.light-mode .form-select{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='%23636366' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E")}.form-select{background-repeat:no-repeat;background-position:right var(--space-4) center;background-size:1rem;padding-right:var(--space-12);cursor:pointer;transition:background-color var(--duration-fast) var(--ease-out),border-color var(--duration-fast) var(--ease-out),color var(--duration-fast) var(--ease-out),box-shadow var(--duration-fast) var(--ease-out)}.light-mode .form-select{background-color:var(--bg-card-solid)}body:not(.light-mode) .form-select{background-color:var(--bg-card-solid);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='%23A1A1A6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E")}input[type=date]{color-scheme:light;transition:background-color var(--duration-fast) var(--ease-out),border-color var(--duration-fast) var(--ease-out),color var(--duration-fast) var(--ease-out)}body:not(.light-mode) input[type=date]{color-scheme:dark}input[type=date]::-webkit-calendar-picker-indicator{opacity:.5;cursor:pointer;transition:opacity var(--duration-fast)}input[type=date]::-webkit-calendar-picker-indicator:hover{opacity:1}.form-help{font-size:.8125rem;color:var(--text-tertiary);line-height:1.4}.form-error-message{display:none;align-items:center;gap:var(--space-3);padding:var(--space-4) var(--space-5);margin-bottom:var(--space-6);background:rgba(255,69,58,.1);border:1px solid rgba(255,69,58,.3);border-radius:var(--radius-md);color:var(--system-red);font-weight:var(--font-weight-medium);font-size:.9375rem;animation:shakeError .4s ease}.form-error-message::before{content:"⚠️";font-size:1.125rem;flex-shrink:0}@media (max-width:768px){.form-input,.form-select{min-height:48px;font-size:16px}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-4) var(--space-8);font-size:1rem;font-weight:var(--font-weight-medium);font-family:inherit;line-height:1.4;text-decoration:none;border:0;border-radius:var(--radius-full);cursor:pointer;transition:all var(--duration-fast) var(--ease-out);white-space:nowrap}.btn .bi{font-size:1.125rem}.btn-primary{background:var(--accent-color);color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-primary:active{background:var(--accent-active);transform:translateY(0);box-shadow:var(--shadow-xs)}.btn-secondary{background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border-color-strong)}.btn-secondary:hover{background:var(--bg-tertiary);transform:translateY(-1px)}.btn-secondary:active{transform:translateY(0)}.btn-outline{background:0 0;color:var(--accent-color);border:1px solid var(--accent-color)}.btn-outline:hover{background:var(--accent-color);color:#fff}@media (max-width:768px){.btn{min-height:48px}.btn-primary{width:100%}}.results{margin-top:var(--space-12)}.results-card{overflow:hidden}.amount-display{text-align:center;padding:var(--space-10);background:linear-gradient(135deg,var(--bg-secondary) 0%,var(--bg-tertiary) 100%);border-radius:var(--radius-xl);margin-bottom:var(--space-8);position:relative;overflow:hidden}.amount-display::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 20%,rgba(0,113,227,.08),transparent 70%);pointer-events:none}body:not(.light-mode) .amount-display::before{background:radial-gradient(circle at 30% 20%,rgba(10,132,255,.12),transparent 70%)}.amount-primary{position:relative;z-index:1}.amount-label{display:block;font-size:.875rem;font-weight:var(--font-weight-medium);color:var(--text-secondary);text-transform:uppercase;letter-spacing:.1em;margin-bottom:var(--space-2)}.amount-value{display:flex;align-items:center;justify-content:center;gap:var(--space-2);font-size:clamp(2rem,5vw,3rem);font-weight:var(--font-weight-bold);color:var(--text-primary);letter-spacing:-.02em;line-height:1.1}.amount-secondary{position:relative;z-index:1;margin-top:var(--space-4)}.amount-conversion{font-size:1.125rem;font-weight:var(--font-weight-medium);color:var(--text-secondary)}.exchange-rate-info{margin-top:var(--space-6);padding-top:var(--space-4);border-top:1px solid var(--border-color);display:flex;flex-direction:column;align-items:center;gap:var(--space-1)}.exchange-rate-label{font-size:.8125rem;color:var(--text-tertiary)}.exchange-rate-value{font-size:.9375rem;font-weight:var(--font-weight-medium);color:var(--text-secondary)}.exchange-rate-updated{font-size:.75rem;color:var(--text-quaternary);font-style:italic}.calculation-breakdown{background:var(--bg-secondary);border-radius:var(--radius-lg);padding:var(--space-6);margin-bottom:var(--space-8)}.calculation-breakdown h3,.scenario-comparison h3{font-size:1.125rem;margin-bottom:var(--space-4);color:var(--text-primary)}.breakdown-item{display:flex;justify-content:space-between;align-items:center;padding:var(--space-3)0;border-bottom:1px solid var(--border-color);font-size:.9375rem}.breakdown-item:last-child{border-bottom:none;padding-bottom:0;font-weight:var(--font-weight-semibold)}.breakdown-item span:first-child{color:var(--text-secondary)}.breakdown-item span:last-child{color:var(--text-primary);font-weight:var(--font-weight-medium)}.scenario-comparison{margin-bottom:var(--space-8)}.scenario-comparison-note{padding:var(--space-4) var(--space-5);background:var(--bg-secondary);border-radius:var(--radius-md);margin-bottom:var(--space-4);text-align:center}.scenario-comparison-note p{font-size:.875rem;color:var(--text-secondary);margin:0;line-height:1.5}.scenarios-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--space-4)}.scenario{padding:var(--space-5);background:var(--bg-secondary);border-radius:var(--radius-lg);border:1px solid var(--border-color);transition:all var(--duration-fast) var(--ease-out)}.scenario:hover{border-color:var(--border-color-strong);transform:translateY(-2px);box-shadow:var(--shadow-sm)}.scenario-best{border-color:var(--system-green);background:linear-gradient(135deg,var(--bg-secondary) 0%,rgba(48,209,88,.08) 100%)}.scenario-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-3)}.scenario-label{font-size:.8125rem;color:var(--text-secondary);font-weight:var(--font-weight-medium)}.scenario-badge{font-size:.6875rem;font-weight:var(--font-weight-semibold);text-transform:uppercase;letter-spacing:.05em;padding:var(--space-1) var(--space-2);background:var(--system-green);color:#fff;border-radius:var(--radius-sm)}.scenario-amount{font-size:1.25rem;font-weight:var(--font-weight-bold);color:var(--text-primary);margin-bottom:var(--space-3)}.scenario-best .scenario-amount{color:var(--system-green)}.scenario-bar{height:4px;background:var(--border-color);border-radius:var(--radius-full);overflow:hidden}.scenario-bar-fill{height:100%;background:var(--accent-color);border-radius:var(--radius-full);transition:width var(--duration-slow) var(--ease-out)}.scenario-best .scenario-bar-fill{background:var(--system-green)}.scenario-note{font-size:.75rem;color:var(--text-tertiary);font-style:italic;text-align:center;margin-top:var(--space-2)}.annual-breakdown{margin-bottom:var(--space-8)}.breakdown-title{font-size:1.125rem;margin-bottom:var(--space-4);color:var(--text-primary)}.annual-breakdown-table{display:flex;flex-direction:column;gap:var(--space-2)}.annual-year,.result-actions{display:flex;align-items:center}.annual-year{justify-content:space-between;padding:var(--space-4);background:var(--bg-secondary);border-radius:var(--radius-md);border:1px solid var(--border-color);transition:all var(--duration-fast) var(--ease-out)}.annual-year:hover{background:var(--bg-tertiary);transform:translateX(4px)}.annual-year .year{font-size:.875rem;color:var(--text-secondary)}.annual-year .amount{font-weight:var(--font-weight-semibold);color:var(--text-primary)}.result-actions{flex-direction:column;gap:var(--space-4)}.export-controls{display:flex;gap:var(--space-3);justify-content:center;flex-wrap:wrap}@media (max-width:480px){.export-controls{flex-direction:column;width:100%}.export-controls .btn{width:100%}}.export-status{width:100%;padding:var(--space-4);background:rgba(48,209,88,.1);border:1px solid rgba(48,209,88,.3);border-radius:var(--radius-md);animation:slideIn .3s var(--ease-out)}.export-status.error{background:rgba(255,69,58,.1);border-color:rgba(255,69,58,.3)}.status-message{display:flex;align-items:center;justify-content:center;gap:var(--space-2);font-size:.9375rem;font-weight:var(--font-weight-medium);color:var(--system-green)}.export-status.error .status-message{color:var(--system-red)}.disclaimer{margin-top:var(--space-12)}.disclaimer-card{background:var(--bg-secondary);border:0}.disclaimer-card .card-header{text-align:left;margin-bottom:var(--space-4)}.disclaimer-card .card-title{justify-content:flex-start;font-size:1.125rem;color:var(--system-orange)}.disclaimer-card .card-title .bi{color:var(--system-orange)}.disclaimer-content{font-size:.9375rem}.disclaimer-content p{margin-bottom:var(--space-3)}.disclaimer-content ul{margin:var(--space-4)0;padding-left:var(--space-6)}.disclaimer-content li{margin-bottom:var(--space-2);color:var(--text-secondary);line-height:1.5}.disclaimer-note{display:flex;align-items:flex-start;gap:var(--space-3);padding:var(--space-4);background:rgba(0,113,227,.08);border:1px solid rgba(0,113,227,.2);border-radius:var(--radius-md);margin-top:var(--space-4)}.disclaimer-note .bi{color:var(--accent-color);flex-shrink:0;margin-top:2px}.disclaimer-source{margin-top:var(--space-4);padding:var(--space-3);background:var(--bg-tertiary);border-radius:var(--radius-sm);font-size:.9rem;color:var(--text-tertiary)}.footer{margin-top:var(--space-6);padding:var(--space-8)0;background:var(--bg-secondary);border-top:1px solid var(--border-color);transition:background-color var(--duration-normal) var(--ease-out),border-color var(--duration-normal) var(--ease-out)}.footer-content{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:var(--space-4)}@media (max-width:640px){.footer-content{flex-direction:column;text-align:center}}.footer-text{font-size:.9375rem;font-weight:var(--font-weight-medium);color:var(--text-primary);margin-bottom:var(--space-1)}.footer-subtext{font-size:.8125rem;color:var(--text-tertiary);margin:0}.footer-links{display:flex;gap:var(--space-3)}.footer-link{display:flex;align-items:center;justify-content:center;width:44px;height:44px;background:var(--bg-card-solid);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-secondary);text-decoration:none;transition:all var(--duration-fast) var(--ease-out)}.footer-link:hover{background:var(--bg-tertiary);color:var(--accent-color);transform:translateY(-2px);box-shadow:var(--shadow-sm)}.footer-link .bi{font-size:1.125rem}.loading{opacity:.6;pointer-events:none;position:relative}.loading::after{content:"";position:absolute;top:50%;left:50%;width:24px;height:24px;margin:-12px 0 0-12px;border:2px solid var(--accent-color);border-radius:50%;border-top-color:transparent;animation:spin .8s linear infinite}.input-summary{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:var(--space-4);margin-bottom:var(--space-6)}.summary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:var(--space-2)}.summary-item{display:flex;justify-content:space-between;align-items:center;padding:var(--space-2) var(--space-3);background:var(--bg-card-solid);border-radius:var(--radius-sm)}.summary-label,.summary-value{font-size:.8125rem;color:var(--text-secondary)}.summary-value{font-weight:var(--font-weight-medium);color:var(--text-primary);text-align:right;max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}@media (prefers-reduced-motion:reduce){*,::after,::before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}html{scroll-behavior:auto}}@media 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