:root{--primary: #4f46e5;--primary-dark: #4338ca;--primary-light: #818cf8;--secondary: #10b981;--danger: #ef4444;--warning: #f59e0b;--gray-50: #f9fafb;--gray-100: #f3f4f6;--gray-200: #e5e7eb;--gray-300: #d1d5db;--gray-600: #4b5563;--gray-700: #374151;--gray-800: #1f2937;--gray-900: #111827;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow: 0 1px 3px 0 rgb(0 0 0 / .1), 0 1px 2px -1px rgb(0 0 0 / .1);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh;color:var(--gray-800);line-height:1.6}.app-header{background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:1.5rem 0;box-shadow:var(--shadow-md);margin-bottom:2rem;border-bottom:3px solid var(--primary)}.app-header h1{color:var(--primary);font-size:2.5rem;font-weight:700;text-align:center;margin:0;display:flex;align-items:center;justify-content:center;gap:.75rem}.app-subtitle{text-align:center;color:var(--gray-600);font-size:1rem;margin-top:.5rem}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem 3rem}.card{background:#fff;border-radius:16px;padding:2rem;box-shadow:var(--shadow-lg);margin-bottom:2rem;transition:transform .2s,box-shadow .2s}.card:hover{transform:translateY(-2px);box-shadow:0 20px 25px -5px #0000001a,0 8px 10px -6px #0000001a}.card-header{border-bottom:2px solid var(--gray-100);padding-bottom:1rem;margin-bottom:1.5rem}.card-header h2{color:var(--gray-800);font-size:1.5rem;font-weight:600;display:flex;align-items:center;gap:.5rem}form{display:grid;gap:1.5rem}.form-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem}.form-group{display:flex;flex-direction:column;gap:.5rem}label{font-weight:600;color:var(--gray-700);font-size:.875rem;text-transform:uppercase;letter-spacing:.05em}input,select{padding:.75rem 1rem;border:2px solid var(--gray-200);border-radius:8px;font-size:1rem;transition:all .2s;background:var(--gray-50);font-family:inherit}input:focus,select:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px #4f46e51a}input:hover,select:hover{border-color:var(--gray-300)}button{padding:.875rem 2rem;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s;box-shadow:var(--shadow);text-transform:uppercase;letter-spacing:.05em}button:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow-lg);background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 100%)}button:active:not(:disabled){transform:translateY(0)}button:disabled{opacity:.6;cursor:not-allowed}.alert{padding:1rem 1.25rem;border-radius:8px;margin-bottom:1.5rem;display:flex;align-items:center;gap:.75rem;font-weight:500;animation:slideIn .3s ease-out}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.alert-error{background-color:#fef2f2;color:#991b1b;border:1px solid #fecaca}.alert-success{background-color:#f0fdf4;color:#166534;border:1px solid #bbf7d0}.loading{text-align:center;padding:3rem;color:var(--gray-600)}.loading:after{content:"";display:inline-block;width:2rem;height:2rem;border:3px solid var(--gray-200);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;margin-left:1rem;vertical-align:middle}@keyframes spin{to{transform:rotate(360deg)}}.measurements-list{list-style:none;display:grid;gap:1rem}.measurement-item{background:var(--gray-50);padding:1.25rem;border-radius:10px;border-left:4px solid var(--primary);display:grid;grid-template-columns:auto 1fr auto;gap:1rem;align-items:center;transition:all .2s}.measurement-item:hover{background:#fff;box-shadow:var(--shadow-md);transform:translate(4px)}.measurement-date{font-weight:600;color:var(--primary);font-size:.875rem}.measurement-data{display:flex;gap:1.5rem;flex-wrap:wrap;align-items:center}.measurement-badge{display:inline-flex;align-items:center;gap:.25rem;padding:.375rem .75rem;background:#fff;border-radius:6px;font-size:.875rem;font-weight:600;box-shadow:var(--shadow-sm)}.badge-bmi{color:var(--primary)}.badge-bmr{color:#f59e0b}.badge-calories{color:var(--secondary)}.empty-state{text-align:center;padding:3rem;color:var(--gray-600);background:var(--gray-50);border-radius:12px;border:2px dashed var(--gray-300)}.chart-container{padding:1.5rem;background:var(--gray-50);border-radius:12px;min-height:300px}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem;margin-bottom:1.5rem}.stat-card{background:linear-gradient(135deg,var(--primary-light) 0%,var(--primary) 100%);color:#fff;padding:1.5rem;border-radius:12px;text-align:center;box-shadow:var(--shadow)}.stat-value{font-size:2rem;font-weight:700;display:block;margin-bottom:.25rem}.stat-label{font-size:.875rem;opacity:.9;text-transform:uppercase;letter-spacing:.05em}@media (max-width: 768px){.app-header h1{font-size:2rem}.card{padding:1.5rem}.form-row{grid-template-columns:1fr}.measurement-item{grid-template-columns:1fr;text-align:center}.measurement-data{justify-content:center}}@media (max-width: 480px){.container{padding:0 1rem 2rem}.card{padding:1rem;border-radius:12px}}