:root{--color-ink:#171717;--color-body:#4d4d4d;--color-mute:#888;--color-hairline:#ebebeb;--color-hairline-strong:#a1a1a1;--color-canvas:#fff;--color-canvas-soft:#fafafa;--color-canvas-soft-2:#f5f5f5;--color-link:#0070f3;--color-link-deep:#0761d1;--color-success:#0070f3;--color-error:#e00;--color-error-soft:#f7d4d6;--color-warning:#f5a623;--color-warning-soft:#ffefcf;--color-warning-deep:#ab570a;--color-primary:#171717;--color-on-primary:#fff;--color-prob-blue:#2563eb;--color-prob-blue-soft:#dbeafe;--color-prob-yellow:#d97706;--color-prob-yellow-soft:#fef3c7;--color-prob-orange:#ea580c;--color-prob-orange-soft:#ffedd5;--color-prob-red:#dc2626;--color-prob-red-soft:#fee2e2;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--space-16:64px;--space-24:96px;--space-32:128px;--radius-xs:4px;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-pill:100px;--radius-full:9999px;--font-sans:"Inter", system-ui, -apple-system, sans-serif;--font-mono:"JetBrains Mono", ui-monospace, SFMono-Regular, monospace;--shadow-1:0 0 0 1px #00000014;--shadow-2:0px 1px 1px #00000005, 0px 2px 2px #0000000a, 0 0 0 1px #00000014;--shadow-3:0px 2px 2px #0000000a, 0px 8px 8px -8px #0000000a, 0 0 0 1px #00000014;--shadow-4:0px 2px 2px #0000000a, 0px 8px 16px -4px #0000000f, 0 0 0 1px #00000014;--container-max:1200px;--nav-height:64px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font-sans);background-color:var(--color-canvas-soft);color:var(--color-ink);-webkit-font-smoothing:antialiased;scroll-behavior:smooth;font-size:16px;line-height:1.5}body{flex-direction:column;min-height:100vh;display:flex}main{flex:1}img,svg{display:block}a{color:inherit;text-decoration:none}button,input,select,textarea{font-family:inherit;font-size:inherit}h1,h2,h3,h4,h5,h6{color:var(--color-ink);font-weight:600;line-height:1.2}.container{max-width:var(--container-max);padding:0 var(--space-6);margin:0 auto}@media (width<=600px){.container{padding:0 var(--space-4)}}.btn{justify-content:center;align-items:center;gap:var(--space-2);cursor:pointer;white-space:nowrap;border:none;font-weight:500;text-decoration:none;transition:all .15s;display:inline-flex}.btn-primary{background:var(--color-primary);color:var(--color-on-primary);border-radius:var(--radius-pill);padding:0 var(--space-6);height:48px;font-size:16px}.btn-primary:hover{opacity:.85}.btn-primary-sm{background:var(--color-primary);color:var(--color-on-primary);border-radius:var(--radius-pill);padding:0 var(--space-3);height:32px;font-size:14px}.btn-primary-sm:hover{opacity:.85}.btn-secondary{background:var(--color-canvas);color:var(--color-ink);border-radius:var(--radius-pill);padding:0 var(--space-6);height:48px;box-shadow:var(--shadow-2);font-size:16px}.btn-secondary:hover{background:var(--color-canvas-soft-2)}.card{background:var(--color-canvas);border-radius:var(--radius-md);box-shadow:var(--shadow-2);padding:var(--space-6)}.card-lg{background:var(--color-canvas);border-radius:var(--radius-lg);box-shadow:var(--shadow-3);padding:var(--space-8)}.form-input{width:100%;height:48px;padding:0 var(--space-3);border:1px solid var(--color-hairline);border-radius:var(--radius-sm);background:var(--color-canvas);color:var(--color-ink);outline:none;font-size:15px;transition:border-color .15s}.form-input:focus{border-color:var(--color-ink);box-shadow:0 0 0 3px #17171714}.form-input::placeholder{color:var(--color-mute)}.section{padding:var(--space-24) 0}.section-sm{padding:var(--space-12) 0}.badge{padding:0 var(--space-2);border-radius:var(--radius-full);background:var(--color-canvas-soft-2);height:22px;color:var(--color-body);align-items:center;font-size:12px;font-weight:500;display:inline-flex}.nav{z-index:100;height:var(--nav-height);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--color-hairline);background:#ffffffd9;position:sticky;top:0}.nav .container{height:100%}.nav-inner{grid-template-columns:1fr auto 1fr;align-items:center;height:100%;display:grid}.nav-left{justify-content:flex-start;display:flex}.nav-logo{align-items:center;gap:var(--space-2);color:var(--color-ink);letter-spacing:-.3px;font-size:15px;font-weight:600;text-decoration:none;display:flex}.nav-logo-icon{width:28px;height:28px}.nav-links{justify-content:center;align-items:center;gap:var(--space-1);list-style:none;display:flex}.nav-link{padding:var(--space-2) var(--space-3);border-radius:var(--radius-full);color:var(--color-body);align-items:center;font-size:14px;text-decoration:none;transition:color .15s,background .15s;display:inline-flex}.nav-link:hover{color:var(--color-ink);background:var(--color-canvas-soft-2)}.nav-right{justify-content:flex-end;align-items:center;gap:var(--space-3);display:flex}.nav-cta{align-items:center;gap:var(--space-2);display:flex}.nav-mobile-toggle{border:1px solid var(--color-hairline);border-radius:var(--radius-sm);cursor:pointer;color:var(--color-ink);background:0 0;padding:6px 8px;display:none}@media (width<=768px){.nav-inner{justify-content:space-between;align-items:center;display:flex}.nav-links{display:none}.nav-mobile-toggle{align-items:center;display:flex}.nav-mobile-open .nav-links{top:var(--nav-height);background:var(--color-canvas);border-bottom:1px solid var(--color-hairline);padding:var(--space-4);gap:var(--space-1);flex-direction:column;display:flex;position:absolute;left:0;right:0}}.responsive-grid-4{gap:var(--space-4);grid-template-columns:repeat(4,1fr);display:grid}@media (width<=768px){.responsive-grid-4{grid-template-columns:repeat(2,1fr)}}@media (width<=480px){.responsive-grid-4{grid-template-columns:1fr}}.input-row{gap:8px;margin-bottom:16px;display:flex}@media (width<=480px){.input-row{flex-direction:column}.input-row button{justify-content:center;width:100%}}.footer{background:var(--color-canvas);border-top:1px solid var(--color-hairline);padding:var(--space-16) 0 var(--space-8)}.footer-grid{gap:var(--space-8);margin-bottom:var(--space-12);grid-template-columns:2fr 1fr 1fr 1fr;display:grid}@media (width<=768px){.footer-grid{gap:var(--space-6);grid-template-columns:1fr 1fr}}@media (width<=480px){.footer-grid{grid-template-columns:1fr}}.footer-col-label{font-family:var(--font-mono);color:var(--color-mute);text-transform:uppercase;letter-spacing:.06em;margin-bottom:var(--space-4);font-size:11px;font-weight:400}.footer-links{gap:var(--space-3);flex-direction:column;list-style:none;display:flex}.footer-links a{color:var(--color-body);font-size:14px;text-decoration:none;transition:color .15s}.footer-links a:hover{color:var(--color-ink)}.footer-bottom{padding-top:var(--space-6);border-top:1px solid var(--color-hairline);color:var(--color-mute);justify-content:space-between;align-items:center;font-size:13px;display:flex}@media (width<=480px){.footer-bottom{gap:var(--space-2);text-align:center;flex-direction:column}}@keyframes snowfall{0%{opacity:0;transform:translateY(-20px)rotate(0)}10%{opacity:1}90%{opacity:1}to{opacity:0;transform:translateY(100vh)rotate(360deg)}}@keyframes countUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.prob-ring{justify-content:center;align-items:center;display:flex;position:relative}.skeleton{background:linear-gradient(90deg, var(--color-canvas-soft-2) 25%, var(--color-canvas) 50%, var(--color-canvas-soft-2) 75%);border-radius:var(--radius-sm);background-size:200% 100%;animation:1.5s infinite shimmer}.tab-group{background:var(--color-canvas-soft-2);border-radius:var(--radius-lg);margin-bottom:var(--space-6);gap:4px;padding:4px;display:flex}.tab-btn{padding:var(--space-2) var(--space-4);border-radius:var(--radius-md);color:var(--color-body);cursor:pointer;background:0 0;border:none;flex:1;font-size:14px;font-weight:500;transition:all .15s}.tab-btn.active{background:var(--color-canvas);color:var(--color-ink);box-shadow:var(--shadow-2)}input[type=range]{appearance:none;border-radius:var(--radius-full);background:var(--color-hairline);cursor:pointer;outline:none;width:100%;height:4px}input[type=range]::-webkit-slider-thumb{appearance:none;background:var(--color-ink);cursor:pointer;border:2px solid var(--color-canvas);width:18px;height:18px;box-shadow:0 0 0 1px var(--color-hairline);border-radius:50%}input[type=range]::-moz-range-thumb{background:var(--color-ink);cursor:pointer;border:2px solid var(--color-canvas);width:18px;height:18px;box-shadow:0 0 0 1px var(--color-hairline);border-radius:50%}.radio-group{gap:var(--space-3);flex-wrap:wrap;display:flex}.radio-option{position:relative}.radio-option input[type=radio]{opacity:0;width:0;height:0;position:absolute}.radio-label{padding:var(--space-3) var(--space-4);border:1px solid var(--color-hairline);border-radius:var(--radius-md);cursor:pointer;background:var(--color-canvas);flex-direction:column;gap:2px;min-width:100px;transition:all .15s;display:flex}.radio-option input[type=radio]:checked+.radio-label{border-color:var(--color-ink);background:var(--color-canvas-soft-2);box-shadow:0 0 0 2px var(--color-ink)}.radio-label:hover{border-color:var(--color-hairline-strong)}.radio-label-title{color:var(--color-ink);font-size:14px;font-weight:500}.radio-label-desc{color:var(--color-mute);font-size:11px}@media (width<=480px){.radio-group{flex-direction:column}.radio-option{width:100%}.radio-label{text-align:center;align-items:center;min-width:0}}.faq-item{border-bottom:1px solid var(--color-hairline)}.faq-question{justify-content:space-between;align-items:center;gap:var(--space-4);width:100%;padding:var(--space-4) 0;cursor:pointer;color:var(--color-ink);text-align:left;background:0 0;border:none;font-size:16px;font-weight:500;transition:color .15s;display:flex}.faq-question:hover{color:var(--color-body)}.faq-icon{flex-shrink:0;width:20px;height:20px;transition:transform .2s}.faq-answer{color:var(--color-body);max-height:0;font-size:15px;line-height:1.7;transition:max-height .3s,padding .3s;overflow:hidden}.faq-item.open .faq-answer{max-height:500px;padding-bottom:var(--space-4)}.faq-item.open .faq-icon{transform:rotate(180deg)}.snowflakes{pointer-events:none;z-index:9999;width:100%;height:100%;display:none;position:fixed;top:0;left:0}.snowflakes.active{display:block}.snowflake{color:#aad4f5;user-select:none;font-size:1.2em;animation:linear infinite snowfall;position:absolute;top:-20px}.result-card{background:var(--color-canvas);border-radius:var(--radius-xl);box-shadow:var(--shadow-4);padding:var(--space-10);text-align:center;position:relative;overflow:hidden}.prob-number{letter-spacing:-4px;font-size:80px;font-weight:600;line-height:1;transition:color .3s}.prob-label{color:var(--color-mute);margin-top:var(--space-2);font-size:14px;font-family:var(--font-mono)}.prob-message{color:var(--color-ink);margin:var(--space-4) 0 var(--space-2);letter-spacing:-.5px;font-size:20px;font-weight:600}.prob-sub{color:var(--color-body);font-size:14px}.weather-grid{gap:var(--space-3);margin-top:var(--space-6);grid-template-columns:repeat(3,1fr);display:grid}@media (width<=480px){.weather-grid{grid-template-columns:1fr}}.weather-item{background:var(--color-canvas-soft-2);border-radius:var(--radius-md);padding:var(--space-4);text-align:center}.weather-val{letter-spacing:-.8px;color:var(--color-ink);font-size:24px;font-weight:600}.weather-lbl{color:var(--color-mute);margin-top:2px;font-size:12px}.forecast-strip{gap:var(--space-3);margin-top:var(--space-4);grid-template-columns:repeat(5,1fr);display:grid}@media (width<=600px){.forecast-strip{grid-template-columns:repeat(3,1fr)}}@media (width<=380px){.forecast-strip{grid-template-columns:repeat(2,1fr)}}.forecast-day{background:var(--color-canvas);border-radius:var(--radius-md);box-shadow:var(--shadow-1);padding:var(--space-3);text-align:center}.forecast-day-name{font-size:11px;font-family:var(--font-mono);color:var(--color-mute);text-transform:uppercase;letter-spacing:.05em;margin-bottom:var(--space-2)}.forecast-snow{color:var(--color-ink);letter-spacing:-.3px;font-size:15px;font-weight:600}.forecast-temp{color:var(--color-body);margin-top:2px;font-size:12px}.forecast-prob{margin-top:var(--space-2);border-radius:var(--radius-full);padding:2px 6px;font-size:11px;font-weight:500;display:inline-block}.forecast-condition-label{border-radius:var(--radius-sm);margin-bottom:var(--space-2);padding:2px 6px;font-size:11px;font-weight:500;display:inline-block}.weather-snow{color:#1e40af;background:#dbeafe}.weather-storm{color:#854d0e;background:#fef3c7}.weather-rain{color:#1e3a8a;background:#e0f2fe}.weather-drizzle{color:#0369a1;background:#f0f9ff}.weather-fog{color:#374151;background:#f3f4f6}.weather-cloudy{color:#4b5563;background:#f3f4f6}.weather-mostly-sunny{color:#b45309;background:#fffbeb}.weather-sunny{color:#c2410c;background:#fff7ed}.tips-grid{gap:var(--space-6);grid-template-columns:1fr 1fr;display:grid}@media (width<=640px){.tips-grid{grid-template-columns:1fr}}.tip-item{gap:var(--space-3);align-items:flex-start;display:flex}.tip-icon{flex-shrink:0;margin-top:2px;font-size:20px}.tip-text h4{margin-bottom:2px;font-size:14px;font-weight:500}.tip-text p{color:var(--color-body);font-size:13px;line-height:1.5}.hero-gradient{background:radial-gradient(80% 50% at 50% -20%,#007cf014 0%,#7928ca0a 50%,#0000 100%)}.text-mute{color:var(--color-mute)}.text-body{color:var(--color-body)}.text-ink{color:var(--color-ink)}.font-mono{font-family:var(--font-mono)}.text-center{text-align:center}.sr-only{clip:rect(0,0,0,0);border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.divider{background:var(--color-hairline);height:1px;margin:var(--space-8) 0}.prose h1{letter-spacing:-1px;margin-bottom:var(--space-4);font-size:32px}.prose h2{letter-spacing:-.5px;margin:var(--space-8) 0 var(--space-3);font-size:20px}.prose h3{margin:var(--space-6) 0 var(--space-2);font-size:16px}.prose p{color:var(--color-body);margin-bottom:var(--space-4);font-size:15px;line-height:1.75}.prose ul{color:var(--color-body);margin-bottom:var(--space-4);padding-left:var(--space-6);font-size:15px;line-height:1.75}.prose li{margin-bottom:var(--space-2)}.prose a{color:var(--color-link);text-decoration:underline}.form-group{margin-bottom:var(--space-4)}.form-label{margin-bottom:var(--space-2);font-size:14px;font-weight:500;display:block}textarea.form-input{height:auto;padding:var(--space-3);resize:vertical;min-height:120px}