:root{--color-primary: #6EC1F5;--color-bg: #F9FAFB;--color-text: #111827;--color-subtle: #E5E7EB;--color-white: #FFFFFF;--color-success: #10B981;--color-warning: #F59E0B;--color-error: #EF4444;--color-info: #3B82F6;--radius: 12px;--radius-sm: 8px;--radius-lg: 16px;--shadow-soft: 0 6px 24px rgba(0, 0, 0, .06);--shadow-medium: 0 8px 32px rgba(0, 0, 0, .12);--shadow-strong: 0 12px 48px rgba(0, 0, 0, .18);--font-main: "SF Pro Display", "Inter", "Helvetica Neue", Arial, sans-serif;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--spacing-2xl: 48px;--transition-fast: .15s ease;--transition-normal: .2s ease;--transition-slow: .3s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-main);background:var(--color-bg);color:var(--color-text);line-height:1.6;font-weight:var(--font-weight-normal);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:var(--spacing-2xl) var(--spacing-lg)}.header-section{margin-bottom:var(--spacing-2xl);text-align:center;padding:var(--spacing-2xl) 0}.main-title{font-size:clamp(2.5rem,6vw,4rem);font-weight:var(--font-weight-bold);margin-bottom:var(--spacing-lg);color:var(--color-text);line-height:1.1;background:linear-gradient(135deg,var(--color-text),#4B5563);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.intro-paragraph{font-size:clamp(1.1rem,3vw,1.3rem);color:#6b7280;max-width:800px;margin:0 auto var(--spacing-lg);line-height:1.6;font-weight:var(--font-weight-normal)}.empower-section,.features-section,.getting-started-section{margin-bottom:var(--spacing-2xl);text-align:center;padding:var(--spacing-2xl) 0;background:var(--color-white);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);transition:all var(--transition-normal)}.empower-section:hover,.features-section:hover,.getting-started-section:hover{box-shadow:var(--shadow-medium);transform:translateY(-2px)}.section-title{font-size:clamp(1.8rem,4vw,2.5rem);font-weight:var(--font-weight-bold);margin-bottom:var(--spacing-lg);color:var(--color-text);line-height:1.2}.section-paragraph{font-size:clamp(1rem,2.5vw,1.2rem);color:#6b7280;margin-bottom:var(--spacing-lg);max-width:800px;margin-left:auto;margin-right:auto;line-height:1.6}.quote{font-style:italic;font-size:clamp(1.1rem,3vw,1.3rem);color:var(--color-text);margin:var(--spacing-lg) 0;padding:var(--spacing-lg);border-left:4px solid var(--color-primary);background:#6ec1f50d;border-radius:0 var(--radius) var(--radius) 0;font-weight:var(--font-weight-medium)}.features-list{list-style:none;padding-left:0;display:inline-block;text-align:left;max-width:600px;margin:0 auto}.features-list li{font-size:clamp(1rem,2.5vw,1.2rem);color:var(--color-text);margin-bottom:var(--spacing-md);padding:var(--spacing-md) var(--spacing-lg);position:relative;background:var(--color-white);border-radius:var(--radius);box-shadow:var(--shadow-soft);transition:all var(--transition-normal);border:1px solid var(--color-subtle)}.features-list li:hover{transform:translate(8px);box-shadow:var(--shadow-medium);border-color:var(--color-primary)}.features-list li:before{content:"✓";position:absolute;left:var(--spacing-md);top:50%;transform:translateY(-50%);color:var(--color-primary);font-weight:var(--font-weight-bold);font-size:1.2rem}.features-list li{padding-left:calc(var(--spacing-lg) + 24px)}.legal-disclaimer{font-size:.9rem;color:#6b7280;margin-bottom:var(--spacing-xl);line-height:1.5}.legal-link{color:var(--color-primary);text-decoration:none;cursor:pointer;font-weight:var(--font-weight-medium);transition:all var(--transition-normal);position:relative}.legal-link:after{content:"";position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--color-primary);transition:width var(--transition-normal)}.legal-link:hover:after{width:100%}.legal-link:hover{color:#5ab9f3}.signin-button{background:linear-gradient(135deg,var(--color-primary),#5AB9F3);color:#fff;border:none;padding:var(--spacing-lg) var(--spacing-2xl);font-size:clamp(1rem,2.5vw,1.2rem);font-weight:var(--font-weight-semibold);border-radius:var(--radius);cursor:pointer;transition:all var(--transition-normal);display:block;margin:0 auto;box-shadow:var(--shadow-soft);position:relative;overflow:hidden;min-width:200px}.signin-button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left var(--transition-slow)}.signin-button:hover:before{left:100%}.signin-button:hover{background:linear-gradient(135deg,#5AB9F3,var(--color-primary));transform:translateY(-3px);box-shadow:var(--shadow-medium)}.signin-button:active{transform:translateY(-1px)}.signin-button:disabled{background:var(--color-subtle);cursor:not-allowed;transform:none;box-shadow:none}.signin-button.loading{background:var(--color-subtle);cursor:not-allowed;position:relative}.signin-button.loading:after{content:"...";animation:loading-dots 1.5s infinite}@keyframes loading-dots{0%,20%{content:"..."}40%{content:""}60%{content:"."}80%{content:".."}to{content:"..."}}.footer{margin-top:var(--spacing-2xl);text-align:center;padding:var(--spacing-2xl) 0;background:var(--color-white);border-radius:var(--radius-lg);box-shadow:var(--shadow-soft)}.footer-nav{display:flex;justify-content:center;gap:var(--spacing-lg);margin-bottom:var(--spacing-lg);flex-wrap:wrap}.footer-link{color:var(--color-text);text-decoration:none;font-size:.9rem;font-weight:var(--font-weight-medium);transition:all var(--transition-normal);position:relative;padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-sm)}.footer-link:after{content:"";position:absolute;bottom:0;left:50%;width:0;height:2px;background:var(--color-primary);transition:all var(--transition-normal);transform:translate(-50%)}.footer-link:hover:after{width:100%}.footer-link:hover{color:var(--color-primary);background:#6ec1f50d}#footer-changelog-link,#footer-changelog-link:link,#footer-changelog-link:visited{font-size:1.1rem;color:#6b7280;opacity:.9;font-weight:var(--font-weight-medium);padding:0;border-radius:0;text-decoration:none}#footer-changelog-link:after{display:none}#footer-changelog-link:hover{color:#9ca3af;background:transparent}.copyright{color:#6b7280;font-size:.8rem;opacity:.7;margin:0;font-weight:var(--font-weight-normal)}@media (max-width: 768px){.container{padding:var(--spacing-lg) var(--spacing-md)}.main-title{font-size:clamp(2rem,8vw,3rem)}.section-title{font-size:clamp(1.5rem,6vw,2rem)}.section-paragraph,.intro-paragraph{font-size:clamp(1rem,3vw,1.1rem)}.footer-nav{justify-content:center;flex-wrap:wrap;gap:var(--spacing-md)}.signin-button{width:100%;max-width:300px}.empower-section,.features-section,.getting-started-section{padding:var(--spacing-lg);margin-bottom:var(--spacing-lg)}}@media (max-width: 480px){.main-title{font-size:clamp(1.8rem,8vw,2.5rem)}.section-title{font-size:clamp(1.3rem,6vw,1.8rem)}.footer-nav{flex-direction:column;align-items:center;gap:var(--spacing-sm)}.features-list li{padding:var(--spacing-md);padding-left:calc(var(--spacing-md) + 24px)}.features-list li:before{left:var(--spacing-md)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.header-section,.empower-section,.features-section,.getting-started-section{animation:fadeInUp .6s ease-out}.empower-section{animation-delay:.1s}.features-section{animation-delay:.2s}.getting-started-section{animation-delay:.3s}