:root{--bg-color:#121212;--surface-color:#1e1e1e;--primary-color:#3b82f6;--success-color:#10b981;--text-color:#f3f4f6;--text-muted:#9ca3af;--border-color:#374151}body{background-color:var(--bg-color);color:var(--text-color);-webkit-font-smoothing:antialiased;margin:0;padding:0;font-family:Inter,system-ui,-apple-system,sans-serif}.app-container{max-width:800px;margin:0 auto;padding:1rem}header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;margin-bottom:2rem;padding:1rem 0;display:flex}h1{color:var(--primary-color);margin:0;font-size:1.5rem;font-weight:700}.card{background:var(--surface-color);border-radius:12px;margin-bottom:1.5rem;padding:1.5rem;box-shadow:0 4px 6px -1px #0000001a}.workout-grid{flex-direction:column;gap:1.5rem;display:flex}.exercise-row{border:1px solid var(--border-color);border-radius:8px;padding:1rem}.exercise-header{justify-content:space-between;margin-bottom:1rem;display:flex}.set-list{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1.25rem;display:grid}.set-item{border:1px solid var(--border-color);background:#ffffff05;border-radius:12px;flex-direction:column;gap:1rem;padding:1.25rem;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex}.set-item:hover{border-color:#fff3}.set-item:focus-within{border-color:var(--primary-color);box-shadow:0 0 0 1px var(--primary-color);background:#3b82f614}.set-input-row{grid-template-columns:1fr 1fr;align-items:flex-end;gap:1rem;display:grid}.set-input-group{flex-direction:column;gap:.5rem;display:flex}.set-input-label{text-transform:uppercase;letter-spacing:.075em;color:var(--text-muted);font-size:.7rem;font-weight:800}.unit-badge{color:var(--text-muted);pointer-events:none;background:#363636;padding-left:4px;font-size:.75rem;font-weight:600;position:absolute;top:50%;right:12px;transform:translateY(-50%)}.btn{background:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:.6rem 1.2rem;font-weight:600;transition:all .2s}.btn:hover{opacity:.9;transform:translateY(-1px)}.btn-secondary{border:1px solid var(--border-color);color:var(--text-muted);background:#ffffff0d}input{border:1px solid var(--border-color);color:#fff;background:#363636;border-radius:6px;width:100%;padding:.5rem;font-size:1rem;transition:border-color .2s}input:focus{border-color:var(--primary-color);outline:none}input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}input[type=number]{-moz-appearance:textfield}