:root{--bg-color: #0f172a;--card-bg: #1e293b;--text-color: #f1f5f9;--text-muted: #94a3b8;--accent-blue: #3b82f6;--accent-green: #22c55e;--water-color: #38bdf8;--electricity-color: #fbbf24;--electricity-dim: #fbbf24;--danger: #ef4444;--border-radius: 12px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:var(--bg-color);color:var(--text-color);line-height:1.6;min-height:100vh}.app{max-width:900px;margin:0 auto;padding:2rem 1rem}header{text-align:center;margin-bottom:2rem}header h1{font-size:2rem;font-weight:700;margin-bottom:.5rem;background:linear-gradient(135deg,var(--water-color),var(--electricity-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subtitle{color:var(--text-muted);font-size:1.1rem}.input-form{background:var(--card-bg);padding:1.5rem;border-radius:var(--border-radius);margin-bottom:2rem}.form-row{display:flex;gap:1rem;margin-bottom:1rem}.form-group{flex:1}.form-group label{display:block;font-size:.875rem;font-weight:500;margin-bottom:.5rem;color:var(--text-muted)}.form-group input,.form-group select{width:100%;padding:.75rem 1rem;font-size:1rem;border:2px solid transparent;border-radius:8px;background:var(--bg-color);color:var(--text-color);transition:border-color .2s}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--accent-blue)}.form-group input::placeholder{color:var(--text-muted)}.form-actions{display:flex;gap:1rem;margin-top:1rem}.btn{padding:.75rem 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h3{font-size:1rem;color:var(--text-muted);margin-bottom:1rem;text-transform:uppercase;letter-spacing:.05em}.viz-value{margin-bottom:1.5rem}.viz-value .big-number{font-size:3rem;font-weight:700}.water-viz .big-number{color:var(--water-color)}.electricity-viz .big-number{color:var(--electricity-color)}.viz-value .unit{font-size:1.25rem;color:var(--text-muted);margin-left:.25rem}.viz-icons{display:flex;justify-content:center;align-items:flex-end;gap:.5rem;min-height:80px;margin-bottom:1rem;flex-wrap:wrap}.icon{color:var(--text-muted)}.icon.glass svg,.icon.jug svg{width:40px;height:60px}.icon.jug svg{width:50px;height:70px}.icon.phone svg{width:40px;height:70px}.icon.bulb{text-align:center}.icon.bulb svg{width:50px;height:70px}.dim-label{display:block;font-size:.75rem;color:var(--text-muted);margin-top:.25rem}.overflow-indicator{font-size:.875rem;color:var(--text-muted);padding:.5rem}.viz-comparison{font-size:.9rem;color:var(--text-muted)}.comparisons{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap}.comparison-card{display:flex;align-items:center;gap:.75rem;background:var(--card-bg);padding:1rem 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var(--bg-color);gap:1rem}.history-item:last-of-type{border-bottom:none}.history-info{flex:1;display:flex;flex-direction:column;gap:.25rem}.history-model{font-weight:600}.history-tokens{font-size:.875rem;color:var(--text-muted)}.history-date{font-size:.75rem;color:var(--text-muted)}.history-impact{display:flex;flex-direction:column;text-align:right;font-size:.875rem;color:var(--text-muted)}.delete-btn{width:28px;height:28px;border:none;border-radius:50%;background:var(--bg-color);color:var(--text-muted);cursor:pointer;font-size:1rem;line-height:1;transition:all .2s}.delete-btn:hover{background:var(--danger);color:#fff}.history-list .btn.danger{margin:1rem;width:calc(100% - 2rem)}.methodology{background:var(--card-bg);padding:1.5rem;border-radius:var(--border-radius);margin-bottom:2rem}.methodology h3{font-size:1rem;margin-bottom:1rem}.methodology p{font-size:.9rem;color:var(--text-muted);margin-bottom:1rem}.methodology details{font-size:.875rem;color:var(--text-muted)}.methodology 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