:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;color:#333}.calculator-container{max-width:1200px;margin:0 auto;padding:20px;min-height:100vh}h1{text-align:center;color:#fff;font-size:2.5rem;margin-bottom:2rem;text-shadow:2px 2px 4px rgba(0,0,0,.3)}h2{color:#2c3e50;margin-bottom:1.5rem;font-size:1.8rem;border-bottom:3px solid #3498db;padding-bottom:.5rem}h3{color:#34495e;margin:1.5rem 0 1rem;font-size:1.3rem}.billing-inputs-section{background:#f8f9fa;padding:1.5rem;border-radius:10px;margin:1.5rem 0;border:1px solid #e1e8ed}.billing-inputs-section h3{margin-top:0;color:#2c3e50;border-bottom:2px solid #3498db;padding-bottom:.5rem}.billing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin:1.5rem 0}.billing-input label{font-size:.9rem}.billing-input input{padding:10px 12px;font-size:.95rem}.consumption-summary{background:#fff;padding:1rem;border-radius:8px;border-left:4px solid #2ecc71;margin-top:1rem}.consumption-summary p{margin:.5rem 0;font-size:1rem;color:#2c3e50}.consumption-summary .highlight{font-weight:700;color:#2ecc71;font-size:1.1rem}.input-section{background:#fff;padding:2rem;border-radius:15px;box-shadow:0 10px 30px #0000001a;margin-bottom:2rem}.input-group{margin-bottom:1.5rem}label{display:block;margin-bottom:.5rem;font-weight:600;color:#2c3e50;font-size:1rem}input{width:100%;padding:12px 16px;border:2px solid #e1e8ed;border-radius:8px;font-size:1rem;transition:all .3s ease;background:#f8f9fa;color:#2c3e50}select{width:100%;padding:12px 16px;border:2px solid #e1e8ed;border-radius:8px;font-size:1rem;transition:all .3s ease;background:#f8f9fa;color:#2c3e50;cursor:pointer}input:focus{outline:none;border-color:#3498db;background:#fff;box-shadow:0 0 0 3px #3498db1a;color:#2c3e50}select:focus{outline:none;border-color:#3498db;background:#fff;box-shadow:0 0 0 3px #3498db1a}input::placeholder{color:#7f8c8d;opacity:.8}small{display:block;margin-top:.5rem;color:#7f8c8d;font-size:.85rem;font-style:italic}.calculate-btn{width:100%;padding:16px;background:linear-gradient(135deg,#3498db,#2ecc71);color:#fff;border:none;border-radius:10px;font-size:1.2rem;font-weight:600;cursor:pointer;transition:all .3s ease;text-transform:uppercase;letter-spacing:1px;margin-top:1rem}.calculate-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px #3498db4d}.calculate-btn:active{transform:translateY(0)}.results-section{background:#fff;padding:2rem;border-radius:15px;box-shadow:0 10px 30px #0000001a;margin-bottom:2rem}.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin-bottom:2rem}.result-card{background:linear-gradient(135deg,#f8f9fa,#e9ecef);padding:1.5rem;border-radius:12px;text-align:center;border:1px solid #dee2e6;transition:all .3s ease;position:relative;overflow:hidden}.result-card:before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(135deg,#3498db,#2ecc71)}.result-card:hover{transform:translateY(-5px);box-shadow:0 10px 25px #0000001a}.result-card h3{margin:0 0 1rem;color:#2c3e50;font-size:1.1rem}.result-value{font-size:2.5rem;font-weight:700;color:#2c3e50;margin:.5rem 0;line-height:1}.result-unit{color:#7f8c8d;font-size:.9rem;font-weight:500;margin:0}.summary{background:#f8f9fa;padding:1.5rem;border-radius:10px;border-left:5px solid #3498db}.summary h3{margin-top:0;color:#2c3e50}.summary ul{list-style:none;padding:0}.summary li{padding:.5rem 0 .5rem 1.5rem;position:relative;color:#34495e;line-height:1.4}.summary li:before{content:"✓";position:absolute;left:0;color:#2ecc71;font-weight:700}.solar-tips{background:#fff;padding:2rem;border-radius:15px;box-shadow:0 10px 30px #0000001a;margin-bottom:2rem}.recommendation-card{background:#f8f9fa;padding:1.5rem;border-radius:10px;border-left:5px solid #3498db;margin-bottom:2rem}.recommendation-card h3{margin:0 0 .5rem;font-size:1.2rem}.recommendation-card p{margin:0;color:#555;line-height:1.5}.tips-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin-bottom:2rem}.tip-card{background:linear-gradient(135deg,#f8f9fa,#fff);padding:1.5rem;border-radius:12px;border:1px solid #e9ecef;transition:all .3s ease;text-align:center}.tip-card:hover{transform:translateY(-3px);box-shadow:0 8px 25px #0000001a}.tip-icon{font-size:2.5rem;margin-bottom:1rem}.tip-card h4{color:#2c3e50;margin-bottom:.5rem;font-size:1.1rem}.tip-card p{color:#555;line-height:1.4;font-size:.9rem}.financial-highlight{background:linear-gradient(135deg,#2c3e50,#3498db);color:#fff;padding:2rem;border-radius:12px;text-align:center}.financial-highlight h3{color:#fff;margin:0 0 1.5rem}.financial-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem}.stat{text-align:center}.stat-value{display:block;font-size:2.5rem;font-weight:700;color:#f1c40f;margin-bottom:.5rem}.stat-label{font-size:1rem;opacity:.9}@media(max-width:768px){.calculator-container{padding:10px}h1{font-size:2rem}.input-section,.results-section,.solar-tips{padding:1.5rem}.result-grid,.tips-grid{grid-template-columns:1fr}.result-value,.stat-value{font-size:2rem}.financial-stats{grid-template-columns:1fr;gap:1rem}}@media(max-width:480px){h1{font-size:1.8rem}.input-section,.results-section,.solar-tips{padding:1rem}.result-value,.stat-value{font-size:1.8rem}.tip-icon{font-size:2rem}}