:root{--color-primary: #1a365d;--color-primary-light: #2b5797;--color-primary-dark: #0f2440;--color-accent: #e07830;--color-accent-light: #f0943c;--color-accent-dark: #c06020;--color-bg: #ffffff;--color-bg-warm: #faf8f5;--color-bg-blue: #f0f4f8;--color-bg-dark: #1a365d;--color-text: #2d3748;--color-text-light: #718096;--color-text-on-dark: #e2e8f0;--color-border: #e2e8f0;--font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;--font-heading: "Merriweather", Georgia, serif;--max-width: 1100px;--nav-height: 72px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;scroll-padding-top:var(--nav-height)}body{font-family:var(--font-body);color:var(--color-text);background:var(--color-bg);line-height:1.7;font-size:17px;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{font-family:var(--font-heading);line-height:1.3;color:var(--color-primary-dark)}img{max-width:100%}a{color:var(--color-primary-light);text-decoration:none}a:hover{color:var(--color-accent)}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}.section{padding:80px 0}.section-subtitle{font-size:1.15rem;color:var(--color-text-light);max-width:700px;margin-bottom:40px}.btn{display:inline-block;padding:14px 28px;border-radius:6px;font-size:1rem;font-weight:600;font-family:var(--font-body);cursor:pointer;transition:all .2s;border:2px solid transparent;text-align:center}.btn-primary{background:var(--color-accent);color:#fff;border-color:var(--color-accent)}.btn-primary:hover{background:var(--color-accent-dark);border-color:var(--color-accent-dark);color:#fff}.btn-secondary{background:transparent;color:var(--color-primary);border-color:var(--color-primary)}.btn-secondary:hover{background:var(--color-primary);color:#fff}.btn-outline{background:transparent;color:var(--color-primary-light);border-color:var(--color-border);padding:10px 20px;font-size:.9rem}.btn-outline:hover{border-color:var(--color-primary-light);color:var(--color-primary)}.btn-large{padding:18px 36px;font-size:1.1rem}.navbar{position:fixed;top:0;left:0;right:0;height:var(--nav-height);background:#fffffff7;border-bottom:1px solid var(--color-border);z-index:1000;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.navbar-inner{max-width:var(--max-width);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between}.navbar-logo{font-family:var(--font-heading);font-size:1.3rem;font-weight:700;color:var(--color-primary-dark)}.navbar-logo:hover{color:var(--color-primary)}.navbar-links{display:flex;align-items:center;gap:8px;list-style:none}.navbar-links button{background:none;border:none;font-family:var(--font-body);font-size:.95rem;color:var(--color-text);cursor:pointer;padding:8px 14px;border-radius:4px;transition:all .2s}.navbar-links button:hover{color:var(--color-primary);background:var(--color-bg-blue)}.navbar-cta{background:var(--color-accent);color:#fff!important;padding:8px 20px;border-radius:6px;font-weight:600;font-size:.95rem;transition:all .2s}.navbar-cta:hover{background:var(--color-accent-dark);color:#fff!important}.navbar-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px}.navbar-toggle span{display:block;width:24px;height:2px;background:var(--color-text);transition:all .3s}.hero{padding:160px 24px 100px;background:linear-gradient(135deg,var(--color-bg-blue) 0%,var(--color-bg-warm) 100%);text-align:center}.hero-content{max-width:800px;margin:0 auto}.hero h1{font-size:2.6rem;margin-bottom:24px;color:var(--color-primary-dark)}.hero-subtitle{font-size:1.2rem;color:var(--color-text-light);margin-bottom:40px;line-height:1.8}.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.problem{background:var(--color-bg)}.problem h2{margin-bottom:32px;font-size:2rem}.problem-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}.problem-text p{margin-bottom:16px}.problem-stats{display:flex;flex-direction:column;gap:20px}.stat-card{background:var(--color-bg-blue);border-left:4px solid var(--color-accent);padding:24px;border-radius:0 8px 8px 0}.stat-number{display:block;font-size:2.2rem;font-weight:800;color:var(--color-primary-dark);font-family:var(--font-heading)}.stat-label{display:block;font-size:.95rem;color:var(--color-text-light);margin-top:4px}.arguments{background:var(--color-bg-warm)}.arguments h2{margin-bottom:12px;font-size:2rem}.arguments-list{display:flex;flex-direction:column;gap:12px}.argument-card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:8px;padding:24px;cursor:pointer;transition:all .2s}.argument-card:hover{border-color:var(--color-primary-light)}.argument-card.open{border-color:var(--color-accent)}.argument-header{display:flex;justify-content:space-between;align-items:center}.argument-header h3{font-family:var(--font-body);font-size:1.1rem;font-weight:600;color:var(--color-primary-dark)}.argument-toggle{font-size:1.5rem;color:var(--color-text-light);flex-shrink:0;width:32px;text-align:center}.argument-body{margin-top:20px;padding-top:20px;border-top:1px solid var(--color-border)}.argument-section{margin-bottom:16px}.argument-label{font-weight:600;font-size:.85rem;text-transform:uppercase;letter-spacing:.05em;color:var(--color-primary-light);display:block;margin-bottom:4px}.argument-section p{color:var(--color-text)}.argument-hook{background:var(--color-bg-blue);padding:16px 20px;border-radius:6px;margin-top:16px}.argument-hook p{font-style:italic;color:var(--color-primary-dark);font-weight:500}.research{background:var(--color-bg)}.research h2{margin-bottom:12px;font-size:2rem}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:60px}.research-stat{text-align:center;padding:32px 20px;background:var(--color-bg-blue);border-radius:8px}.research-stat-number{font-family:var(--font-heading);font-size:2.4rem;font-weight:900;color:var(--color-primary-dark)}.research-stat-unit{font-size:1rem;font-weight:500;color:var(--color-text-light)}.research-stat-desc{margin-top:8px;font-size:.95rem;color:var(--color-text-light)}.research-buried{background:var(--color-primary-dark);color:var(--color-text-on-dark);padding:48px;border-radius:12px;margin-bottom:32px}.research-buried h3{color:#fff;font-size:1.5rem;margin-bottom:24px}.buried-items{display:flex;flex-direction:column;gap:20px}.buried-item{padding-left:20px;border-left:3px solid var(--color-accent)}.buried-item p{color:var(--color-text-on-dark);line-height:1.7}.research-source{text-align:center;padding:24px;color:var(--color-text-light);font-size:.9rem}.tryit{background:linear-gradient(135deg,var(--color-accent) 0%,var(--color-accent-dark) 100%);color:#fff;text-align:center}.tryit h2{color:#fff;font-size:2rem;margin-bottom:20px}.tryit-content{max-width:650px;margin:0 auto}.tryit p{margin-bottom:20px;font-size:1.1rem;opacity:.95}.tryit .btn-primary{background:#fff;color:var(--color-accent-dark);border-color:#fff;margin-top:12px}.tryit .btn-primary:hover{background:var(--color-bg-warm);border-color:var(--color-bg-warm)}.about{background:var(--color-bg-warm)}.about h2{margin-bottom:32px;font-size:2rem}.about-content{display:grid;grid-template-columns:1fr 1fr;gap:48px}.about-text p{margin-bottom:16px}.about-principles h3{font-size:1.2rem;margin-bottom:16px}.about-principles ul{list-style:none;display:flex;flex-direction:column;gap:16px}.about-principles li{padding-left:24px;position:relative}.about-principles li:before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;background:var(--color-accent);border-radius:50%}.action{background:var(--color-bg)}.action h2{margin-bottom:12px;font-size:2rem}.action-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.action-card{text-align:center;padding:32px 20px}.action-icon{width:48px;height:48px;background:var(--color-bg-blue);color:var(--color-primary-dark);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-weight:700;font-size:1.2rem}.action-card h3{font-family:var(--font-body);font-size:1.05rem;margin-bottom:8px}.action-card p{font-size:.95rem;color:var(--color-text-light)}.footer{background:var(--color-primary-dark);color:var(--color-text-on-dark);padding:60px 0 32px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;margin-bottom:40px}.footer-brand h3{color:#fff;font-size:1.2rem;margin-bottom:8px}.footer-brand p{color:var(--color-text-on-dark);opacity:.8}.footer-links h4{color:#fff;font-family:var(--font-body);font-size:.9rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:12px}.footer-links ul{list-style:none;display:flex;flex-direction:column;gap:8px}.footer-links a{color:var(--color-text-on-dark);opacity:.8;font-size:.95rem}.footer-links a:hover{opacity:1;color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;text-align:center;font-size:.85rem;opacity:.6}.tests-page{padding-top:var(--nav-height)}.tests-page h1{font-size:2.2rem;margin-bottom:16px}.tests-instructions{background:var(--color-bg-blue);padding:24px;border-radius:8px;margin-bottom:40px;border-left:4px solid var(--color-primary-light)}.test-sets{display:grid;grid-template-columns:1fr 1fr;gap:32px;margin-bottom:40px}.test-set-card{border:1px solid var(--color-border);border-radius:12px;padding:32px}.test-set-card h2{font-size:1.6rem;margin-bottom:8px}.test-set-desc{color:var(--color-text-light);margin-bottom:24px}.test-downloads{display:flex;flex-direction:column;gap:16px}.test-download-item{display:flex;justify-content:space-between;align-items:center;padding:16px;background:var(--color-bg-warm);border-radius:8px;gap:16px}.test-download-item h4{font-family:var(--font-body);font-size:1rem;color:var(--color-primary-dark);margin-bottom:4px}.test-download-item p{font-size:.85rem;color:var(--color-text-light)}.tests-note{background:var(--color-bg-warm);padding:24px;border-radius:8px;font-size:.95rem;color:var(--color-text-light)}@media(max-width:900px){.problem-grid,.about-content,.test-sets{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.action-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr;gap:32px}.research-buried{padding:32px 24px}}@media(max-width:640px){body{font-size:16px}.hero{padding:120px 20px 60px}.hero h1{font-size:1.8rem}.hero-subtitle{font-size:1.05rem}.hero-actions{flex-direction:column;align-items:center}.section{padding:48px 0}h2{font-size:1.5rem!important}.stats-grid,.action-grid{grid-template-columns:1fr}.navbar-links{display:none;position:absolute;top:var(--nav-height);left:0;right:0;background:#fff;border-bottom:1px solid var(--color-border);flex-direction:column;padding:16px 24px;gap:4px}.navbar-links.open,.navbar-toggle{display:flex}.test-download-item{flex-direction:column;align-items:flex-start}}