:root{--color-primary: #2d6a4f;--color-primary-light: #40916c;--color-primary-dark: #1b4332;--color-accent: #95d5b2;--color-bg: #fafafa;--color-surface: #ffffff;--color-text: #1a1a2e;--color-text-muted: #555;--color-border: #e0e0e0;--color-error: #d32f2f;--radius: 8px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--max-width: 1200px;--font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family);color:var(--color-text);background:var(--color-bg);line-height:1.6;min-height:100vh}#root{min-height:100vh;display:flex;flex-direction:column}.app-layout{display:flex;flex-direction:column;min-height:100vh}.main-content{flex:1;max-width:var(--max-width);width:100%;margin:0 auto;padding:2rem 1.5rem}.app-header{background:var(--color-surface);border-bottom:1px solid var(--color-border);padding:1rem 1.5rem;position:sticky;top:0;z-index:100}.header-container{max-width:var(--max-width);margin:0 auto;display:flex;align-items:center;justify-content:space-between}.logo{text-decoration:none;color:var(--color-primary-dark)}.logo h1{font-size:1.5rem;font-weight:700;letter-spacing:-.02em}.main-nav{display:flex;align-items:center;gap:1.5rem}.main-nav a{color:var(--color-text);text-decoration:none;font-size:.9rem;font-weight:500;transition:color .2s}.main-nav a:hover{color:var(--color-primary)}.nav-button,.nav-button-primary{background:none;border:none;cursor:pointer;font-size:.9rem;font-weight:500;padding:.5rem 1rem;border-radius:var(--radius);transition:all .2s}.nav-button{color:var(--color-text-muted)}.nav-button:hover{color:var(--color-primary);background:var(--color-accent)}.nav-button-primary{background:var(--color-primary);color:#fff;text-decoration:none}.nav-button-primary:hover{background:var(--color-primary-dark)}.app-footer{text-align:center;padding:1.5rem;color:var(--color-text-muted);font-size:.85rem;border-top:1px solid var(--color-border)}.page{padding:1rem 0}.page h2{font-size:1.75rem;font-weight:700;margin-bottom:.5rem}.page-description{color:var(--color-text-muted);margin-bottom:2rem}.hero{text-align:center;padding:4rem 1rem}.hero h2{font-size:2.5rem;color:var(--color-primary-dark);margin-bottom:1rem}.hero-subtitle{font-size:1.15rem;color:var(--color-text-muted);max-width:600px;margin:0 auto 2rem}.cta-group{display:flex;gap:1rem;justify-content:center}.cta-button{display:inline-block;padding:.75rem 2rem;background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius);font-size:1rem;font-weight:600;text-decoration:none;cursor:pointer;transition:background .2s}.cta-button:hover{background:var(--color-primary-dark)}.cta-button:disabled{opacity:.6;cursor:not-allowed}.cta-button-secondary{display:inline-block;padding:.75rem 2rem;background:transparent;color:var(--color-primary);border:2px solid var(--color-primary);border-radius:var(--radius);font-size:1rem;font-weight:600;text-decoration:none;cursor:pointer;transition:all .2s}.cta-button-secondary:hover{background:var(--color-primary);color:#fff}.features{padding:3rem 0}.features h3{font-size:1.5rem;text-align:center;margin-bottom:2rem}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem}.feature-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow-sm);transition:box-shadow .2s}.feature-card:hover{box-shadow:var(--shadow-md)}.feature-card h4{color:var(--color-primary-dark);margin-bottom:.5rem}.feature-card p{color:var(--color-text-muted);font-size:.9rem}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin-top:1.5rem}.dashboard-card{display:block;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:2rem;text-decoration:none;color:inherit;box-shadow:var(--shadow-sm);transition:all .2s}.dashboard-card:hover{box-shadow:var(--shadow-md);border-color:var(--color-primary-light)}.dashboard-card h3{color:var(--color-primary-dark);margin-bottom:.5rem}.dashboard-card p{color:var(--color-text-muted)}.calculator-form{max-width:500px;display:flex;flex-direction:column;gap:1.25rem}.form-group{display:flex;flex-direction:column;gap:.4rem}.form-group label{font-size:.875rem;font-weight:600;color:var(--color-text)}.form-group input{padding:.6rem .8rem;border:1px solid var(--color-border);border-radius:var(--radius);font-size:1rem;transition:border-color .2s}.form-group input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2d6a4f1a}.calculate-button{padding:.75rem 2rem;background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius);font-size:1rem;font-weight:600;cursor:pointer;transition:background .2s;margin-top:.5rem}.calculate-button:hover{background:var(--color-primary-dark)}.result-card{margin-top:2rem;padding:1.5rem;background:var(--color-surface);border:2px solid var(--color-accent);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.result-card h3{margin-bottom:1rem;color:var(--color-primary-dark)}.result-values{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.result-item{display:flex;flex-direction:column}.result-label{font-size:.8rem;font-weight:600;text-transform:uppercase;color:var(--color-text-muted)}.result-value{font-size:1.5rem;font-weight:700;color:var(--color-primary-dark)}.result-disclaimer{margin-top:1rem;font-size:.8rem;color:var(--color-text-muted);font-style:italic}.auth-page{display:flex;justify-content:center;align-items:flex-start;padding-top:3rem}.auth-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:2rem;width:100%;max-width:400px;box-shadow:var(--shadow-md)}.auth-card h2{margin-bottom:1.5rem;text-align:center}.auth-form{display:flex;flex-direction:column;gap:1rem}.auth-link{margin-top:1.5rem;text-align:center;font-size:.9rem;color:var(--color-text-muted)}.auth-link a{color:var(--color-primary);font-weight:500}.error-message{padding:.75rem;background:#fdecea;color:var(--color-error);border-radius:var(--radius);font-size:.875rem}.empty-state{text-align:center;padding:4rem 2rem;color:var(--color-text-muted)}.empty-state p{margin-bottom:1.5rem}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:4rem;gap:1rem}.loading-spinner{width:32px;height:32px;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:768px){.hero h2{font-size:1.75rem}.feature-grid{grid-template-columns:1fr}.main-nav{gap:.75rem}.result-values{grid-template-columns:1fr}}