:root{--bg-color:#f5f5f7;--nav-bg:hsla(0,0%,100%,.8);--text-primary:#1d1d1f;--text-secondary:#6e6e73;--card-bg:hsla(0,0%,100%,.8);--border-color:rgba(0,0,0,.1);--toggle-bg:hsla(0,0%,100%,.9);--toggle-text:#1d1d1f;--toggle-shadow:rgba(0,0,0,.1);--progress-bg:rgba(0,0,0,.08);--progress-fill:#2563eb}.dark-mode{--bg-color:#000;--nav-bg:rgba(22,22,23,.8);--text-primary:#f5f5f7;--text-secondary:#86868b;--card-bg:rgba(22,22,23,.8);--border-color:hsla(0,0%,100%,.1);--toggle-bg:rgba(44,44,46,.9);--toggle-text:#fff;--toggle-shadow:rgba(0,0,0,.3);--progress-bg:hsla(0,0%,100%,.08);--progress-fill:#3b82f6}*{margin:0;padding:0;box-sizing:border-box}body{min-height:100vh;background:var(--bg-color);font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,SF Pro Icons,Helvetica Neue,Arial,sans-serif;color:var(--text-primary);position:relative;line-height:1.47059;font-weight:400;letter-spacing:-.022em;transition:background-color .3s}.nav{position:fixed;top:0;left:0;right:0;height:48px;background:var(--nav-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;padding:0 24px;z-index:100}.nav-links{display:flex;gap:24px}.nav-link{color:var(--text-primary);text-decoration:none;font-size:14px;opacity:.8;transition:opacity .2s}.nav-link:hover{opacity:1}.theme-toggle{background:var(--toggle-bg);color:var(--toggle-text);border:1px solid var(--border-color);padding:4px 12px;border-radius:20px;display:flex;align-items:center;gap:6px;cursor:pointer;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);transition:all .3s;font-size:13px;box-shadow:0 2px 8px var(--toggle-shadow);font-weight:500;height:28px}.theme-toggle:hover{transform:scale(1.05)}.main-content{padding:80px 20px 40px;display:flex;flex-direction:column;align-items:center;min-height:calc(100vh - 200px)}.counter-container{text-align:center;padding:3rem}.counter-container,.supplementary-content{background:var(--card-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:24px;box-shadow:0 4px 24px rgba(0,0,0,.04);border:1px solid var(--border-color);width:100%;max-width:880px;margin-bottom:1rem}.supplementary-content{padding:2rem}.main-title{font-size:2rem;font-weight:700;color:var(--text-primary);margin-bottom:1.5rem;line-height:1.2;letter-spacing:-.025em}.days-container{margin:2rem 0;position:relative;display:flex;flex-direction:column;align-items:center}.days-wrapper{position:relative;display:inline-block;margin:0 auto}.days{font-size:120px;font-weight:700;color:var(--text-primary);line-height:1;letter-spacing:-.015em;text-align:center}.copy-button{position:absolute;bottom:0;right:-40px;width:32px;height:32px;border-radius:50%;border:1px solid var(--border-color);background:var(--card-bg);color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;padding:0}.copy-button:hover{transform:scale(1.1);background:var(--border-color)}.days-label{font-size:24px;margin-top:.5rem}.days-label,.subtitle{color:var(--text-secondary);font-weight:400}.subtitle{font-size:17px;margin-top:1.5rem}.info{font-size:15px;color:var(--text-secondary);font-weight:400;margin-top:1rem;opacity:.8}.content-section{text-align:left;margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border-color)}.content-section:first-child{margin-top:0;padding-top:0;border-top:none}.content-section h2{font-size:1.5rem;margin-bottom:1rem;color:var(--text-primary)}.content-section h3{font-size:1.2rem;margin:1.5rem 0 .5rem;color:var(--text-primary)}.content-section p{margin-bottom:1rem;color:var(--text-secondary);line-height:1.6}.content-section ul{list-style-type:none;padding:0;margin:1rem 0}.content-section li{margin:.5rem 0;color:var(--text-secondary);padding-left:1.5rem;position:relative;line-height:1.6}.content-section li:before{content:"•";position:absolute;left:.5rem;color:var(--text-primary)}.content-section pre{background:var(--progress-bg);padding:1rem;border-radius:8px;overflow-x:auto;margin:1rem 0}.content-section code{font-family:Monaco,Courier New,monospace;font-size:.9em}.features-grid{margin:1rem 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));grid-gap:1rem;gap:1rem}.feature-item{padding:1rem;background:var(--bg-color);border-radius:12px;border:1px solid var(--border-color)}.feature-item h3{margin:0 0 .5rem;font-size:1.1rem}.feature-item p{margin:0;font-size:.9rem}.faq-item{margin-bottom:1.5rem}.faq-item:last-child{margin-bottom:0}.use-cases{margin-top:1rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:1rem;gap:1rem}.use-case h4{color:var(--text-primary);margin-bottom:.5rem;font-size:1rem}.key-dates li{margin:.25rem 0}.year-progress{margin-top:1.5rem;padding:1rem;background:var(--bg-color);border-radius:12px;border:1px solid var(--border-color)}.progress-bar{width:100%;height:8px;background:var(--progress-bg);border-radius:8px;margin:.75rem 0;overflow:hidden;box-shadow:inset 0 1px 2px rgba(0,0,0,.1)}.progress{height:100%;background:var(--progress-fill);border-radius:8px;transition:width .5s ease,background-color .3s ease;box-shadow:0 1px 2px rgba(0,0,0,.1)}.percentage{font-size:.9rem;color:var(--text-secondary);font-weight:500}.footer{background:var(--card-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-top:1px solid var(--border-color);padding:1.5rem 1rem;margin-top:1rem;text-align:center}.footer-content{max-width:880px;margin:0 auto}.footer-section p{margin-bottom:.5rem}.footer-keywords{opacity:.8}.footer-bottom,.footer-keywords{font-size:.8rem;color:var(--text-secondary)}.footer-bottom{margin-top:.5rem;opacity:.7}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(100px);background:var(--card-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-color);padding:12px 24px;border-radius:12px;box-shadow:0 4px 24px rgba(0,0,0,.1);opacity:0;transition:all .3s ease;font-size:14px;z-index:1000}.toast.show{transform:translateX(-50%) translateY(0);opacity:1}@media (max-width:480px){.nav{padding:0 16px}.nav-links{gap:16px}.counter-container,.supplementary-content{padding:1.5rem;margin:.5rem}.main-title{font-size:1.5rem;margin-bottom:1rem}.days{font-size:96px}.days-label{font-size:21px}.copy-button{right:-36px;width:28px;height:28px}.subtitle{font-size:15px}.info{font-size:13px}.content-section{margin-top:1rem;padding-top:1rem}.content-section h2{font-size:1.25rem}.content-section h3{font-size:1.1rem}.content-section li,.content-section p{font-size:.9rem}.footer{margin-top:.5rem;padding:1rem}.faq-item{margin-bottom:1rem}.features-grid,.use-cases{grid-template-columns:1fr}.toast{font-size:13px;padding:10px 20px;margin:0 20px}}